MOTOR CONTROL DEVICE, MECHATRONIC UNIT, AND ELECTRIC VEHICLE SYSTEM

WIPO Patent Application WO/2021/049248

A1

Conventionally, changes in switching frequency, such as an increase in switching frequency, have posed the problem of causing greater switching loss in an inverter.　A first electric current command generation unit 111 receives input of a battery voltage E and a torque command T*. A second electric current command generation unit 112 receives input of: the battery voltage E; the torque command T*; and a voltage usage rate obtained by dividing a line voltage effective value by a battery voltage (DC voltage). An electric current command selection unit 113 receives input of the magnet temperature Tmag of a rotor magnet. In normal operation, the electric current command selection unit 113 selects an electric current command that is output from the first electric current command generation unit 111. When the magnet temperature exceeds a prescribed value, the electric current command selection unit 113 selects an electric current command that is output from the second electric current command generation unit 112. The second electric current command generation unit 112 causes the voltage usage rate to be outside the range of 0.3-0.4.

HARA TAKAFUMI (JP)
AJIMA TOSHIYUKI (JP)
HOSHINO KATSUHIRO (JP)
MAEKAWA NORIYUKI (JP)

PCT/JP2020/030845

March 18, 2021

August 14, 2020

Click for automatic bibliography generation  

HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

H02P21/14; H02K7/116; H02K11/33; H02P27/08

JP2014128122A	2014-07-07
JP2008245486A	2008-10-09
JP4292871B2	2009-07-08

TODA Yuji (JP)

View/Download PDF      PDF Help

Previous Patent: FUEL PUMP

Next Patent: WINDING SWITCHING DEVICE, AND ROTATING ELECTRICAL MACHINE DRIVE SYSTEM USING SAME