ELECTRONIC CONTROL DEVICE

WIPO Patent Application WO/2024/057448

A1

The present disclosure provides an electronic control device that is capable of limiting noise from an electric motor when switching carrier frequencies. This electronic control device controls an electric motor for the travel of a vehicle, the device including a switching condition storage unit (122), a traveling load computing unit (121), a switching condition determining unit (123), and a frequency control unit (124). The switching condition storage unit (122) stores a switching condition in which the rotation speed of the electric motor is less than a predetermined lower limit value and a torque command of the electric motor is higher than a predetermined upper limit value. The traveling load computing unit (121) calculates a traveling load (Lt) of the vehicle on the basis of the rotation speed (ω) and the torque command (Tc) of the electric motor. The switching condition determining unit (123) determines whether the switching condition is satisfied after a predetermined time period has elapsed, on the basis of the traveling load (Lt) of the vehicle and the rotation speed (ω) and the torque command (Tc) of the electric motor. When the switching condition determining unit (123) has determined that the switching condition is satisfied, the frequency control unit (124) reduces the carrier frequency of the electric motor when the torque command of the electric motor is equal to or less than the upper limit value.

SATO YASUAKI (JP)
AOYAGI SHIGEHISA (JP)
MIYAMOTO SHOGO (JP)
TSUKAGOSHI TAKAYA (JP)

PCT/JP2022/034430

March 21, 2024

September 14, 2022

Click for automatic bibliography generation  

HITACHI ASTEMO LTD (JP)

B60L3/00; B60L9/18

JP2008131851A	2008-06-05
JP2007143303A	2007-06-07
JP2020162202A	2020-10-01

HIRAKI & ASSOCIATES (JP)

View/Download PDF      PDF Help

Previous Patent: CONNECTOR CONNECTION STRUCTURE AND METHOD FOR MANUFACTURING SAME

Next Patent: ROTATING MACHINE CONTROL DEVICE