BYD Co., the Chinese automaker backed by billionaire Warren Buffett, and Daimler have set up a venture to develop electric cars in the world’s largest auto market.
Daimler, the world’s second-biggest manufacturer of luxury cars, and BYD will invest $88 million in the 50-50 partnership in China, the carmaker from Stuttgart, Germany, said in an e-mailed statement last week.
Daimler is pushing into electric-vehicle production in China to challenge luxury leader BMW, while the venture gives Shenzhen-based BYD access to Daimler’s technologies. Battery-powered electric vehicles may make up 3 percent of the more than 90 million cars sold globally by 2020, consulting company IHS Global Insight said.
read this news @ http://www.evhub.in/news/32
Monday 31 May 2010
Reva gets a recharge
The electric car brand Reva may soon have a new logo which will include the name of Mahindra. But will rebranding alone help in creating mass appeal?
It took him six years to create a saleable, environment-friendly electric car, and almost 10 more years to make it the world’s single-largest selling model. Today, it’s probably the world’s largest selling electric car with little over 3,500 units sold in the last one decade. Chetan Maini, a technocrat entrepreneur, however, did not break even.
His company invested more than $50 million (around Rs 225 crore) to manufacture EVs, but saw limited returns due to the high cost of manufacturing. Maini, thus, could not lend Reva – India’s first electric car – a touch of mass appeal. Many factors worked against him. India, for one, does not have enough charging stations. Besides, his company did not have enough money to keep on pushing the product merely on its environment-friendly features.
read this news @ http://www.evhub.in/news/31
Sunday 30 May 2010
EVHUB Discussions updates
Growth Of Electric Bikes, A Potential Business Opportunity ( 9 Comments ) - http://www.evhub.in/content/
Technology Overview Of Electric Bikes In India ( 2 Comments ) -
Review of Lectrix E1 ( 3 comments )
India On Electric Wheels ( 6 Comments )
Understanding Of Various Features Observed In Existing Electric Bikes ( 2 Comments )
Electric Bikes In India - Presentation ( 2 Comments )
Battery Technology Used In EVs ( 3 Comments )
Saturday 29 May 2010
U.S. and China focus on hybrid, electric vehicles, expecting partner opportunities
INDIANAPOLIS, May 28 (Xinhua) -- Hundreds of officials and entrepreneurs from China and the United States fixed their eyes on hybrid and electric vehicles on Friday, when the first U.S.-China Advanced Technology Vehicle Summit kicked off in Indianapolis.
The summit, which is hosted by the Energy Systems Network, a non-profit organization focused on growth and commercialization within the clean technologies and energy sectors, brought together a delegation of Chinese automakers and Indiana manufacturers of components for hybrid and plug-in electric vehicles to share information and explore potential business relationships that could result in new opportunities for Hoosier firms and future foreign investment in the state.
The Chinese delegation was led by Wang Chao, the Assistant Minister of Chinese Ministry of Commerce, and comprised by nearly 100 Chinese government officials and automotive executives coming from several Chinese top automakers and vehicle parts suppliers
read this article @ http://www.evhub.in/news/30
World's Hottest Electric Vehicles On Display at EP!C
VANCOUVER, Canada– EPIC: The Vancouver Sun Sustainable Living Expo is back May 28-30 at the Vancouver Convention Centre West for its fourth year as Western Canada’s largest smart lifestyle consumer tradeshow and eco-marketplace.
 |
| Epic 2009 (Photo: Epic) |
read this article @ http://www.evhub.in/news/28
Nissan Smyrna Electric Vehicle Project To Create 1,500 Jobs In Tennessee
Deputy Secretary Poneman Attends Ground Breaking at Tennessee Advanced Vehicle Battery Plant.
The U.S. Deputy Secretary of Energy Daniel Poneman participated in the groundbreaking ceremony for Nissan North America’s advanced battery manufacturing facility in Smyrna, Tennessee.
This past January the Department closed a $1.4 billion loan with Nissan North America to retool the Smyrna factory to build advanced electric automobiles and an advanced battery manufacturing facility.
“I’m excited about the future we have begun to build here today — a future where America’s workers have good jobs, making clean cars that will reduce our dependence on oil and help us transition to a clean energy economy,” said Deputy Secretary Poneman.
read this article @ http://www.evhub.in/news/28
Friday 28 May 2010
To launch Maxximo electric trucks by yr-end: Anand Mahindra
Mahindra and Mahindra (M&M) has bought a majority stake in electric car company, Reva. The commercial vehicle major would now hold 55.2% in Reva via the stake sale and fresh equity infusion. M&M would invest USD 10 million in the electric car major and would rename thecompany as Mahindra Reva Electric.
A day after sealing the deal with Reva, Anand Mahindra, VC & MD, M&M explained his strategy to CNBC-TV18 of entering the electric car segment.
Q: What would this move mean for the Indian consumer?
A: I would say one has to view this acquisition as an acquisition of a competence, of a capability. Don’t focus on are we going into small cars and what’s in it right away for the consumer. Mahindra andMahindra as an automaker with global aspirations has to have the competence for alternate fuel technology. As you know yourself, you have been following the company for a long time, we have been putting our tentacles out in each possible area of technology.
As you know every year at the Auto Expo we showcase what progress we have made, whether they are on even the hydrogen combustion, three wheeler for example or biofuels which we have been following for a long time. I think our operating management led by Pawan felt very clearly that the investment in Reva would put us ahead of our planned trajectory and that’s why the acquisition made sense.
So you have to put yourself in our shoes and realise that a company of our aspirations must have the ability to play in the field of electric vehicles and that is essentially what we have acquired.
read the news article @ http://www.evhub.in/news/26
M&M’s green move
If the future of vehicular motion is total electrification, the acquisition of electric carmaker Reva by utility vehicles major Mahindra & Mahindra (M&M) makes strategic sense. The move would also boost synergy, with M&M benefiting from Reva’s technology for electric variants of its three-wheeler and minitruck.
Reva, in turn, stands to gain from M&M’s marketing presence and strong dealer network. Opinion has it that sales of electric cars would touch 1.5-2 million globally within a decade. But others more sanguine say the percentage of electric cars could reach 25% in that period, driven by sustained technological improvements.
Now, Reva cars are green, environment-friendly and zero-emission vehicles, but the numbers on the road add up to only about 3,500 in 24 countries. The limited battery capacity, need for repeated charging and its modest seating space have all been a drag on Reva sales. But note that 45% of the energy released by electric-car batteries is spent on propulsion — it points at an efficiency level that is already between 10% and 30% higher that those in conventional internal-combustion engines.
read news article @ http://www.evhub.in/news/27
Thursday 27 May 2010
Topic ” Pros & Cons of Electric vehicles ” Article writing Contest! from EVHUB
Topic ” Pros & Cons of Electric vehicles ” @ http://evcontest.evhub.biz/
Last date of submitting articles is 30th June 2010. Write your articles as per our Contest rules and email us to articles@evhub.biz.
Results will be declared and published on this page by 10th July 2010.
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Tuesday 25 May 2010
Ford Invests $135M In Green Parts For Hybrid Electric Vehicles
Ford Motor Company announced that it will invest $135 million in two Michigan factories to design, engineer and build key green vehicle parts for the next generation of hybrid-electric vehicles that go into production in 2012.
The investment will result in adding 170 jobs to its Rawsonville plant, while Engineers in Dearborn will design the battery packs and more than 50 engineers to its Van Dyke Transmission Plant in Sterling Heights in the next two years.
Ford would be pumping about $10 million at its Rawsonville components plant to produce lithium-ion battery packs for future hybrid vehicles, also moving its work to Michigan that is currently performed by Delphi in Mexico. About 40 new jobs will be created in the starting of 2012. As of now Ford employs about 780 at Rawsonville plant.
Ford would be pumping about $10 million at its Rawsonville components plant to produce lithium-ion battery packs for future hybrid vehicles, also moving its work to Michigan that is currently performed by Delphi in Mexico. About 40 new jobs will be created in the starting of 2012. As of now Ford employs about 780 at Rawsonville plant.
Read full article @ http://www.evhub.in/news/23
Electric and Hybrid Cars Taking Off
The global market forelectric carsis ready to surge, proving skeptics wrong and leaving car companies scrambling to make them, the chief executive of Nissan told theWall Street Journal. Nissan will begin selling the all-electric Leaf sedan in December.
Nissan is trying to carve out a leadership position in the industry with electric vehicles. It plans to sell 50,00 electrics in the U.S., Japan and Europe in each of 2011 and 2012n, and then leap to 500,000 in 2013 when the Leaf will be profitable, according to the Journal.
Meanwhile Ford said it plans to make more of the components for its hybrid and electric vehicles in the U.S. as part of an effort to increase the number of low- or zero-emission models it offers over the next few years, reported the Journal. By 2020, the automaker expects that 10% to 25% of its global lineup will be such models.
Read the news @ http://www.evhub.in/news/24
Electric Vehicles video thread started in EVHUB.IN
Now EVHUB.IN has started compiling and collecting various useful videos related to electric vehicles
Electric Vehicles video thread started in EVHUB.IN @ http://www.evhub.in/topic/electric-vehicle-videos/
Electric Vehicles video thread started in EVHUB.IN @ http://www.evhub.in/topic/electric-vehicle-videos/
Terry McAuliffe firm buys electric car company
Terry McAuliffe is in the car business.
The former Virginia Democratic gubernatorial hopeful last week paid $20 million for Hong Kong-based EuAuto Technology, which builds an electric vehicle called the MyCar.
MyCar is for people who need wheels to run errands or tool around the neighborhood.
"It's really a second car if you live in Washington," McAuliffe said.
McAuliffe bought MyCar through his McLean-based holding company, GreenTech Automotive. GreenTech will provide MyCar with capital and access to the U.S. market.
McAuliffe said if MyCar is approved by the U.S. regulators, it could be on sale next year.
MyCar can travel 70 miles on a single charge and has a top speed of 45 miles per hour.
The MyCar is not for highway travel, and is designed to sell as a second car for families. The MyCar will be priced between $13,000 and $16,000, McAuliffe said. It will take four hours to charge.
In addition to the MyCar, GreenTech is developing four highway-ready prototypes using European technology. Three of the vehicles are hybrids and one is electric. McAuliffe said GreenTech is scouting sites in Mississippi, Tennessee and Virginia for a plant where it can manufacture his product line.
Read complete news @ http://www.evhub.in/news/22
MyCar is for people who need wheels to run errands or tool around the neighborhood.
"It's really a second car if you live in Washington," McAuliffe said.
McAuliffe bought MyCar through his McLean-based holding company, GreenTech Automotive. GreenTech will provide MyCar with capital and access to the U.S. market.
McAuliffe said if MyCar is approved by the U.S. regulators, it could be on sale next year.
MyCar can travel 70 miles on a single charge and has a top speed of 45 miles per hour.
The MyCar is not for highway travel, and is designed to sell as a second car for families. The MyCar will be priced between $13,000 and $16,000, McAuliffe said. It will take four hours to charge.
In addition to the MyCar, GreenTech is developing four highway-ready prototypes using European technology. Three of the vehicles are hybrids and one is electric. McAuliffe said GreenTech is scouting sites in Mississippi, Tennessee and Virginia for a plant where it can manufacture his product line.
Read complete news @ http://www.evhub.in/news/22
LI-ION MOTORS CORP. UNVEILS WORLD’S best an all ELECTRIC SUPERCAR - “THE INIZIO”
(I-Newswire) May 24, 2010 - Li-ion Motors Corp. (OTCBB:LMCO) www.Li-ionMotors.com manufactures emission free electric vehicle using lithium-ion batteries technology. The company will reveal its super electric car Inizio to the media and to shareholders and the public at an open house on September 15, 2010.
The Inizio is a world class an all electric super car. This super car will be manufactured in North Carolina where the company has 40,000 foot facility. With the heavy production in this electric super car; LMCO and its associated people can now think of great revenues.
This super car runs at a speed of 170 miles per hour or 272 kilometer per hour with an acceleration of 0 to 60 miles or 0 to 96 kilometers in just 3.4 seconds. LMCO’s electric car uses an advanced lithium ion battery technology. This lithium–ion battery ranges 250miles or 400miles per charge. LMCO says that with excellent power the car has a bigger cockpit than other cars for the comfort of taller customers. Li-ion Motors electric car is designed very beautifully and has a multifunction power seats that include both heating and cooling. With this LMCO offers removable hardtop stores in the car and can be raised or lowered for the ease of entrance and exit. The car is easy in handling steep curbs and driveways. All the body parts of the car designed such that it offers better quality, lighter and stronger parts.
Read complete news @ http://www.evhub.in/news/21
Saturday 22 May 2010
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Friday 21 May 2010
Electric cars leave Nissan hot, Toyota warm and Honda cold. Read this article @ http://ping.fm/nzxWa
Tuesday 18 May 2010
New Lithium Battery and Management System Doubles Range of ZAP Electric Cars
SANTA ROSA, Calif., May 18, 2010 (BUSINESS WIRE) -- Electric vehicle pioneer ZAP(ZAAP 0.38, -0.01, -2.56%) has begun shipping lithium battery systems for various models of its electric cars, trucks, vans and scooters, offering at least four times the life of standard lead-acid batteries and twice the driving range. The new battery system is the first turnkey, drop-in replacement battery system that fits in the same space as the G-31 lead acid batteries used in many of ZAP's vehicles, equipped with a BMS (battery management system) that increases reliability and extends range.
The lightweight lithium battery system is used in the ZAP Alias, allowing it to drive up to 100 miles on a single charge. In China, ZAP's new fleet vehicles use a similar system for its electric taxis and corporate vehicles based on the Jonway A380 SUV. A sub-chassis array of more than 100 battery cells is networked with an electronic monitoring system, ensuring that temperature and voltage of each cell are in balance and that electricity is automatically rerouted should any of the cell voltages change.
read the article @ http://www.evhub.in/news/14
AM General to assemble Ford’s electric vehicle in Livonia
AM General L.L.C.
will assemble
Ford Motor Co.’s all electric Transit Connect commercial vehicle at its engineering and product development center in Livonia.
Oak Park-based
Azure Dynamics Corp.is designing and manufacturing the lithium ion battery-powered electric powertrain system and
Johnson Controls Inc.is supplying the battery packs and cells for the powertrain.
will assemble
Ford Motor Co.’s all electric Transit Connect commercial vehicle at its engineering and product development center in Livonia.
Oak Park-based
Azure Dynamics Corp.is designing and manufacturing the lithium ion battery-powered electric powertrain system and
Johnson Controls Inc.is supplying the battery packs and cells for the powertrain.
Read the news here - http://www.evhub.in/news/15
Monday 17 May 2010
Are Lithium Air Batteries the Future of Electric Vehicles?
Researchers at Argonne Labs are in the early stages of developing lithium air batteries, which according to some scientists, could be as much as 100 times more powerful than current electric vehicle battery packs.
But what if lithium batteries could be lighter, cheaper and at least five times more powerful than those that will power cars like the Chevy Volt,Mitsubishi i-MiEV, or Nissan Leaf?
Go to http://www.evhub.in/news/13 for this article
Nissan says Leaf electric car to cost under $38,100
LONDON, May 17 (Reuters) - Nissan (7201.T), Japan's third-biggest carmaker, said on Monday its Leaf electric car would cost under 30,000 euros ($38,110) in most European countries after incentives offered by governments to push the new technology.
Nissan Motor Co and French alliance partner Renault (RENA.PA) are investing over 4 billion euros in electric vehicles and see them accounting for 10 percent of new car sales by 2020, an ambitious forecast compared with those of other carmakers and analysts. [ID:nLDE63R29H] Electric vehicles are expected to account for 4.5 percent of the total 100 million strong light vehicle market by 2020, according to a recent report by HSBC analysts.
News @ http://www.evhub.in/news/12
EVHUB Forum updates
| What is the difference between 40Cr steel and EN8 Steel and which is better? Created on May 12 2010 at 07:00:35 AM by murali | 1 |
| Useful links in Brushless DC Drives Created on May 12 2010 at 06:15:38 AM by Admin | 1 |
| Useful links in Electric Hybrid Vehicles Created on May 12 2010 at 06:15:04 AM by Admin | 2 |
| Dealers in Delhi/NCR Created on May 11 2010 at 03:52:23 PM by Payal Mehra | 2 |
| how to maintain the electric vehicle battery Created on May 11 2010 at 03:02:48 PM by selvan | 2 |
| how to convert cylinder capacity(cc) to power( watts) Created on May 11 2010 at 02:36:56 PM by selvan | 2 |
| What do you prefer? Electric Bike or Petrol Bike? and Why? Created on May 11 2010 at 02:30:43 AM by murali | 3 |
| Electric Byke shops in chennai Created on May 10 2010 at 04:37:56 PM by Gowri Shankara Rao Uriti | 3 |
| Encouraging schemes to switch over to electrical bykes Created on May 10 2010 at 04:34:37 PM by Gowri Shankara Rao Uriti | 3 |
| Electric Vehicles Vs Petrol Vehicles Created on May 9 2010 at 04:25:22 AM by sireesha | 4 |
Friday 14 May 2010
Paper_on_PM_motor_by_Ashish_D
Permanent Magnet Motors Introduction and Trends
Introduction of Author:
Ashish Deshpande has been working in the domain of electrical motor design and air conditioning for last 11years. His area of interest is Interior Permanent Magnet motor design and development. He is continuing his master degree from Bharati Vidyapeeth, Pune. This article is related to his dissertation work which is guided by Prof.Mrs. S.S. More. His dissertation topic is Design of Permanent Magnet Motor (PMSM) for Air Conditioning Compressor by Optimum Utilization of Induction Motor Manufacturing Set Up. You can contact him on ashishonmail@rediffmail.com
Induction motor is preferred choice of manufacturer and customer primarily due its robustness, easy manufacturing, and low maintenance. But is this the most efficient motor? Answer is obviously no. Efficiency is function of losses, so let us revisit the Induction Motor losses as shown in figure1. Now if compare these losses with permanent magnet (PM) motor, we would notice that there is rotor copper loss which is almost 15 to 20% of overall losses.
As these losses goes down the cooling requirement of motor can be reduced.
Figure1 : Losses Comparison of IM and PMSM
PM motor offers following benefits over Induction Motor,
· No rotor copper losses
· Cooling of the motor only for the stator copper and iron loses, cooling requirements goes down
· Different size/ volume and arrangements of magnets on the rotor will lead variety of desired characteristics.
· Higher efficiency because of fewer losses.
· Compact high density magnets can reduce the overall size of motor
The indicative comparison of various parameters is covered in Conclusion.
If we compare various motor technologies as against design, performance and manufacturing parameters, following table helps to select the appropriate technology. The scale between Excellent and Positive is larger to magnify the difference in various technologies.
Excellent: 10
Positive: 3
Weak: 1
Table 1: Motor Technology Comparison
Parameters | IM | PMSM | BLDC | Variable SRM |
3 | 10 | 10 | 3 | |
Noise (low) | 3 | 10 | 3 | 10 |
Converter Complexity | 1 | 1 | 3 | 1 |
Power Density | 1 | 10 | 10 | 3 |
Power Factor | 3 | 10 | 10 | 3 |
Torque Ripple Low Speed | 1 | 10 | 3 | 1 |
Starting | 3 | 3 | 3 | 3 |
Manufacturing | 3 | 3 | 3 | 1 |
Total Score | 18 | 57 | 45 | 25 |
IM: Induction Motor
PMSM: Permanent Magnet Synchronous Motor (or BLAC)
BLDC: Brushless DC (Uses Permanent magnet)
SRM: Switched Reluctance Motor
Above comparison clearly shows that PMSM will be the future technology.
What is Difference between PMSM and BLDC motor?
There is confusion or misconception about Brushless DC and Permanent Magnet AC. Many people think that BLDC (Brushless DC Motor) is permanent magnet motor. But there are two separate technologies available, BLDC and BLAC (Brushless AC Motor). BLAC motor is nothing but PMSM.
The significant difference in operation of these two motors is the stator winding design and in turn back EMF generated.
Following are several terms interchangeably used in BLDC and BLAC literature.
· BLDC: Square wave motor, Trapezoidal wave motor
· BLAC: Permanent Magnet Synchronous Motor (PMSM), Sinwave motor
The BLDC needs separate manufacturing set up for stator to develop BLDC motor for Induction Motor manufacturer. Whereas the BLAC (PMSM) motor can utilize the existing induction stator set up including winding machines.
Figure 2 shows the winding distribution for BLDC and BLAC.
BLAC (or PMSM) stator is similar to Induction motor stator and uses distributed winding. Whereas BLDC motor uses concentrated winding unlike Induction Motor. So BLAC stator can easily built on Induction motor manufacturing set up, but for BLDC motor new manufacturing set up is required.
Figure 2: BLDC and BLAC (PMSM) Stator Winding
In case of BLDC motor, the winding is energized in normally 60 electrical degrees. This generates pulsation in torque. So BLDC motors are prone to vibrate more and needs attention if the application is sensitive to sound and vibration. The advantage of BLDC motor is simple construction and less expensive controller. BLDC stator can be easily build on DC motor manufacturing set up. In case of PMSM there are very less torque pulsation and sound quality and vibration are at par with BLDC and IM. But PMSM need complex field oriented controller and start up algorithm making it bit expensive than BLDC.
Depending winding type, rotor mounting method, back EMF waveform,
Permanent Magnet motor can be classified as shown in figure 3,
Figure 3: Classification of Permanent magnet motor
Both BLDC and BLAC have got the permanent magnet on rotor, various rotor configurations are available depending on magnet mounting on rotor. Two major rotor configurations as shown below (figure 4),
Figure 4: Permanent magnet rotor configuration
BLAC (PMSM) with Buried Magnet or interior magnet rotor is most popular configuration to replace Induction Motor. The Interior magnet rotor makes motor to operate in field weakening region or above base speed as shown in figure 5.
Figure 5: Operation Range of IPM motor
Spoke type or C type interior designs are manufacturing friendly.
Sensors are used for sensing rotor position to drive current in stator winding. Resolvers, Hall sensors, optical encoders are few of the sensors available with these motors. Following figure 6 shows the typical BLDC motor block diagram.
Figure 6: Block Diagram of Typical BLDC Motor with Sensor.
In certain applications sensors can not be used, like hermetic motor for air conditioning compressor. So there are sensorless PMSM motors which estimate the rotor position and voltages from mathematical model of motor. There is ready made solution from IC manufacturers for PMSM. In India also there are few IC companies who offer this technology from there counterparts in US or Japan.
Trends in Motor and Drives Technology
Following figure shows the overall technology trend in motor-drive segment.
Figure 7: Motor and Drives Technology Trend
With the development of MOSFET and IGBT switches, the power electronics
widened the applications for high current and voltage applications. Especially
Inverters technology developed rapidly and now most efficient and sophisticated
Space Vector PWM technique is available.
In case of motor technology, Induction motor posed lot of challenges to new
technologies due to its simplicity, low maintenance and cost. For next couple of years Induction motor may be back bone for most of the electromechanical energy conversion applications. But with energy crisis the need of efficient technology is posing great threat to Induction Motor. PM motor is primarily developed from demanding energy efficiency requirements. Also BLAC (PMSM) is widely accepted technology for Hybrid Electric Vehicles, so the development and research is on rampage. Following is electric machine technology trend.
Figure 8: Motor Technology Trend
Conclusion:
As Interior Permanent magnet (IPM) rotor configuration allow the field weakening operation, it is considered to be Induction Motor replacement. Also IPM offers better protection against demagnetization of magnets due to stator magnetic field. It provided barriers to stator flux and avoid demagnetization. So IPM is proffered configuration.
Surface mount PM rotor configurations is suitable where field weakening is not required and motor runs at constant speed. The magnets are glued over the rotor surface, hence there is restriction on rpm for surface mount PM rotor configuration.
Instead of simple PWM, Space Vector PWM controllers are efficient and hence it is preferred. To reduce switching losses and hysteresis losses, the number of poles needs to selected for Permanent magnet motor.
As PMSM or BLAC develops less torque pulsation, it is used in the applications where noise and vibrations need to match with Induction motor. The BLDC can be used where there is not stringent requirement on noise and vibration. PMSM needs field oriented control and start up algorithm so its controller is expensive than BLDC. Depending customer specification BLDC or BLAC can be selected.
For induction motor manufacturers, it easy to switch to BLAC or PMSM type motor as stator manufacturing facility can be utilized as it is. BLAC is getting popular for Electric Vehicle application.
With reference to Induction Motor, PMSM motor parameters are compared in following charts. Volume and weight of equivalent will be reduced by 20 to 25%.
Figure 7: Volume of IM and PMSM
Figure 8: Weight of IM and PMSM
Figure 9: Efficiency of IM and PMSM
Above comparison is for rating 5hp and above. Following chart shows IM and PMSM efficiency comparison for 5hp and below ratings.
Figure 10: Efficiency of IM and PMSM (5HP and below rating)
These performance and dimensional parameters are studied and compared from
various motor manufacturers catalogue and brochures. This comparison is
indicative and sets expectations from PM motor. User may get more benefits by using PM motor as indications are based on conservative data.
PMSM technology provides good opportunity to reduce energy
Consumption and get more star ratings developed by BEE for many appliances and applications. The challenges to build permanent magnet rotor is also reducing as many Chinese suppliers are providing sophisticated permanent magnet rotor manufacturing set up. Even though initial cost of PM motor will be high, the pay back period will be less than IM. PM motor can be future back bone for many electromechanical conversion applications.
.
Note from EVHUB.BIZ
This article was published in http://www.evhub.biz for sharing the importance of Permanent magnet motors. Permanent magnet motors are being used in various electric vehicles - 2 wheelers, 3 wheelers and heavy vehicles due to the advantages explained in the above article.
Thursday 13 May 2010
Introduction To Hybrid Electric Vehicle And Key Challenges
Due to increase in fuel cost and high efficiency demand from market, electric vehicle development is ramped up. Toyota launched its first Hybrid Electric Vehicle (HEV) and it is commercially available across the world. This article focuses on introduction of HEV and some of its design challenges in electrical system perspective. It also covers how simulation technology is going to play important role in the product (HEV) development.
Inverter, battery, converter and motor are the major additional or new components in the vehicle to make if HEV or EV. Here the battery is also referred as additional component as it would battery pack unlikesingle battery in existing conventional vehicle. Refer figure1, the major components and its likely positions are indicated in the vehicle.
Permanent Magnet Motors Introduction And Trends
Induction motor is preferred choice of manufacturer and customer primarily due its robustness, easy manufacturing, and low maintenance. But is this the most efficient motor? Answer is obviously no. Efficiency is function of losses, so let us revisit the Induction Motor losses as shown in figure1. Now if compare these losses with permanent magnet (PM)motor, we would notice that there is rotor copper loss which is almost 15 to 20% of overall losses.
As these losses goes down the cooling requirement of motor can be reduced.
Read full article @ http://www.evhub.in/content/permanent-magnet-motors-introduction-and-trends/
Video Of EVHUB's Stall In Bangalore International Auto Expo 2010
EVHUB's Stall in Bangalore International Auto Expo 2010 as Electric Vehicle media partner to the event.
Go the video - http://www.evhub.in/content/video-of-evhubs-stall-in-bangalore-international-auto-expo-2010/
Go the video - http://www.evhub.in/content/video-of-evhubs-stall-in-bangalore-international-auto-expo-2010/
Battery Technology Used In EVs
A battery is the most expensive and least environmentally friendly component of an electric car. It is a real pain - a hurdle that keeps the electric motoring from development. Using the knowledge we posses, we cannot make an EC travel further than 120 miles between recharges.
With such a low range it is and remains limited by city borders not giving us the real mobility and flexibility. Is there a chance we could come up with a new electric car battery that gives us a better range? Let's first look at the known and available options.
1. Lead-Acid Batteries
Although Alessandro Volta invented a battery in 1800, it was 1859 when a lead-acid prototype was created by Gaston Plante. These batteries are robust, tolerant to abuse, tried and tested and because of their low cost.
Ø For higher power applications with intermittent loads however, Lead acid batteries are generally too big and heavy and they suffer from a shorter cycle life and typical usable power down to only 50% Depth of Discharge (DOD). Despite these shortcomings Lead acid batteries are still being specified for Power Net applications (36 Volts 2 kWh capacity) because of the cost, but this is probably the limit of their applicability and NiMH and Li-Ion batteries are making inroads into this market.
Ø Lead-acid batteries are composed of a Lead-dioxide cathode, a sponge metallic Lead anode and a Sulphuric acid solution electrolyte. This heavy metal element makes them toxic and improper disposal can be hazardous to the environment.
The cell voltage is 2 Volts
The cell voltage is 2 Volts
read full article @ http://www.evhub.in/content/battery-technology-used-in-evs/
Wednesday 12 May 2010
Introduction To Electric Motors And BLDC Motors
Presentation on " Introduction To Electric Motors And BLDC Motors "
http://www.evhub.in/content/introduction-to-electric-motors-and-bldc-motors/
http://www.evhub.in/content/introduction-to-electric-motors-and-bldc-motors/
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