US 12,463,576 B2
Inverter control device and inverter control method
Shigehisa Aoyagi, Hitachinaka (JP); Takafumi Hara, Tokyo (JP); and Takaya Tsukagoshi, Hitachinaka (JP)
Assigned to HITACHI ASTEMO, LTD., Hitachinaka (JP)
Appl. No. 18/565,657
Filed by HITACHI ASTEMO, LTD., Hitachinaka (JP)
PCT Filed Feb. 15, 2022, PCT No. PCT/JP2022/005918
§ 371(c)(1), (2) Date Nov. 30, 2023,
PCT Pub. No. WO2022/259624, PCT Pub. Date Dec. 15, 2022.
Claims priority of application No. 2021-096908 (JP), filed on Jun. 9, 2021.
Prior Publication US 2024/0291417 A1, Aug. 29, 2024
Int. Cl. H02P 27/08 (2006.01); H02P 23/14 (2006.01); H02P 25/026 (2016.01)
CPC H02P 27/085 (2013.01) [H02P 23/14 (2013.01); H02P 25/026 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An inverter control device that controls an inverter to rotationally drive a motor by generating a PWM pulse signal for driving a plurality of switching elements included in the inverter by pulse width modulation and outputting the PWM pulse signal to the inverter, wherein
the inverter control device performs the pulse width modulation by selecting one of a synchronous pulse control mode in which a frequency of a carrier wave used in the pulse width modulation is changed in accordance with a rotation speed of the motor and an asynchronous pulse control mode in which the frequency of the carrier wave is constant regardless of the rotation speed of the motor, and
at a time of switching from the asynchronous pulse control mode to the synchronous pulse control mode, the inverter control device changes a carrier reference phase that is a reference value of a phase of the carrier wave to a different value before and after the switching.