Hitachi Automotive: 800V high-volt inverter unveiled: output density increased by 2.7 times
Hitachi Automotive Systems:
The 46th Tokyo Motor Show 2019 introduces the company’s electrification technology and automatic driving system.
800V high voltage inverter: specs
Maximum output is 135kW,
Maximum torque is 315Nm.
Maximum rotation speed is 13,000 rpm,
System voltage is 650V
Distributed winding is adopted for the stator winding method, and the coil is distributed from 2 slots to 4 slots.
This suppresses torque ripple that is a source of vibration and noise.
Start of mass production:
Japan will start mass production in November 2019,
In China, mass production will begin within 2020.
Mass production started in the US in 2022
800V high voltage inverter: Comparison with conventional products
The high-voltage, high-power inverter achieves 800V withstand voltage performance that is twice that of the company’s conventional product and an output density of 94.3kVA / l (liter), which is 2.7 times higher.
In order to improve the pressure resistance performance, the insulation design of the entire inverter has been reviewed.
Increasing the amount of heat generated due to higher voltages can be achieved by expanding the diameter of the water-cooled fins on both sides of the power module.
MONOist