How Companies Advancing Electric Vehicles (EVs) with Multi-Speed Transmission

9 Oct
2019

 
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Combustion free electric vehicles (EVs) have been developing with advanced transmission technologies. The benefits of this new technological addition to the world of electric vehicles are attracting the drivers. Most of the EVs have a single-speed transmission, unlike those combustion engine cars with the multi-speed transmission. This is because electric motors have a much larger range of revolution per minute (RPM) as compared to combustion engines with full torque at zero rpm. Moreover, the engineers may use a multi-speed transmission for benefitting the performance in EVs, as it can offer several advantages such as:

  • Improved efficiency of the powertrain to produce better range and smaller battery pack with reduced weight and cost of the powertrain.
  • Multi-speed transmission can help to avoid extreme wide RPM in EVs with improved acceleration requirements and extreme top speed requirements.

Additionally, with varied alterations in EVs, the EV transmission market is developing. According to a report published by Allied Market Research, the global electric vehicle (EV) transmission market is estimated to reach $15.38 billion at a CAGR of 25.8% by 2026. Likewise, various companies have stepped up to provide EVs a better status with the multispeed transmission. Ricardo is developing an electric drive unit (EDU) to control transmissions, inverter, and motor for improving the performance of EV. On the other hand, Tata introduces another technology Ziptron to enhance power trains for EVs. The following is the in-detailed presentation:

Ricardo develops a scalable EDU to control transmission, motor, and inverter:

To provide the better power and torque density along with system efficiency, better vibration, harshness, and noise performance, Ricardo, a British automotive company took efforts to develop an EDU. According to the company, the multispeed transmission is more beneficial than single-speed transmission in terms of system cost, energy efficiency, compressed electric motor with reduced weight and small battery size. Furthermore, the single EDU will be used to control the transmission, motor, and inverter.

The electric motor has active oil jets on the end windings which doesn’t require a back-iron cooling. On the other hand, the inverter is oil-cooled with direct jet cooling. Moreover, the transmission is innovated with dual-clutch to enable fewer frictional losses and lesser bearings.

Tata introduces Ziptron technology to improve powertrain:

Another technology that has been developed by Tata Motors, an Indian multinational locomotive company is offers a consistent power train including engine, transmission, axles, and the driveshaft for EVs. The company claims to offer eight years of battery and motor warranty. This can be a transforming feature as batteries in fuel or lead acid-based vehicles don’t have more than four years of warranty.

Furthermore, all the electronic vehicles by the company will be powered by Ziptron. The president of the company claims Ziptron powertrain to be tested across 1 million kilometers. The full-charged battery lasts up to 200kms and it is certified to be water and dustproof.

After various transmissions, the engineers are modifying EVs with multispeed transmissions. Moreover, the multispeed transmission has proved to be beneficial in several terms such as speed, acceleration, and performance efficiency. However, with major companies stepping ahead towards the latest EV transmission technologies, there will soon be an increase in the adoption of EVs as well. On the other hand, the technological advancements in transmission and efficient EVs will provide lucrative growth to the EV transmission market.

Reference :

  • electronicdesign.com
  • thenewsminute.com
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    Jessica Hamelburg

    Jessica Hamelburg

    PR & Marketing Professional at EquipNet, Inc.

    Jessica Hamelburg is a content marketing coordinator and social media manager for a global industrial asset management company, EquipNet, Inc. Jessica holds a Bachelor's Degree in Communications and Public Relations from Suffolk University and offers many years of experience in various forms of writing. Some of her favorite hobbies include exploring new music, creative writing and spending time with her dogs.

     
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