Spotlight on the Zytek Components in the Yamaha MOTIV.e
Zytek Automotive recently released info that the Yamaha MOTIV.e EV presented in Tokyo three months ago uses the new generation of Zytek powertrain components.
According to Zytek, ultra-high-speed motor design, thermal management and control integration cut cost, weight and size for new powertrain.
By ultra-high speed, Zytek means 15,000 rpm. Weight of the motor is about 13 kg. An additional 11 kg is for Vocis reduction gearbox with 1-speed. Power electronics is manufactured by Continental, which owns Zytek, and weight of inverter is another 7.5 kg. In total, it will be 31.5 kg or almost 70 lbs for 15 kW continuous and 25 kW peak power.
Zytek’s sales and marketing director, Steve Tremble remakred:
“Yamaha wanted the vehicle to reflect the company’s reputation for outstanding engines. Interpreting this in an electric vehicle has driven excellence in performance and driveability, but also in weight reduction and efficiency to build on the potential of iStream to deliver an agile drivers’ car as well as maximising the range.”
Zytek’s engineering program manager, Neil Cheeseman stated:
“The motor weighs just 13kg, the gearbox just 11kg. These are components that you can pick up with one hand.”
“By making everything in house, Continental has eliminated many of the compromises that stem from using bought-in components,” he said. “Their substantial investment in power electronics has delivered a scalable, power-dense and cost-effective product range that is already proven on everything from small city cars to hybrid commercial vehicles.”
Zytek supplies the electronic vehicle control module (EVCM), which provides the interface between the powertrain and the rest of the vehicle.
“This is a new generation of EVCM that integrates torque arbitration, temperature control and voltage management to allow better decision making. It optimises the driver’s torque request based on a broad range of parameters including battery charge and temperature and the grip available at the tyres to support control. By integrating these decisions, we can provide more with less to improve both the driving experience and the range while reducing the size, weight and cost of the power electronics and battery pack.”
At the end of the press release from Zytek we see one more interesting number:
“There are now more than 4,000 vehicles on the road driven by Zytek powertrain.“