MOTOR CONTROLLER, MOTOR CONTROL METHOD, HYBRID SYSTEM, STEP-UP CONVERTER SYSTEM, AND ELECTRICALLY-DRIVEN POWER STEERING SYSTEM

• Main Authors: TSUKAGOSHI TAKAYA, HARA TAKAFUMI, YASUJIMA TOSHIYUKI, HOSHINO KATSUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 27.05.2021
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROL OR REGULATION THEREOF; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

To effectively suppress vibration and noise generated at a permanent magnet synchronous motor.SOLUTION: A motor controller 1 comprises: a triangular wave generation unit 17 for generating a triangular wave signal Tr, a carrier; a carrier frequency adjustment unit 16 for adjusting a carrier frequency fc representing a frequency of the triangular wave signal Tr; and a gate signal generation unit 18 that uses the triangular wave signal Tr to perform pulse width modulation on three-phase voltage commands Vu*, Vv*, Vw* depending on a torque command T* to generate a gate signal for controlling operation of an inverter. The carrier frequency adjustment unit 16, on the basis of the torque command T* and rotation speed ωr of the motor, adjusts the carrier frequency fc so as to change a voltage phase error Δθv representing a phase difference between the triangular wave signal Tr and the three-phase voltage commands Vu*, Vv*, Vw*.SELECTED DRAWING: Figure 2 【課題】永久磁石同期モータで発生する振動や騒音を効果的に抑制する。【解決手段】モータ制御装置１は、搬送波である三角波信号Ｔｒを生成する三角波生成部１７と、三角波信号Ｔｒの周波数を表す搬送波周波数ｆｃを調整する搬送波周波数調整部１６と、三角波信号Ｔｒを用いてトルク指令Ｔ＊に応じた三相電圧指令Ｖｕ＊、Ｖｖ＊、Ｖｗ＊をパルス幅変調し、インバータの動作を制御するためのゲート信号を生成するゲート信号生成部１８とを備える。搬送波周波数調整部１６は、トルク指令Ｔ＊と、モータの回転速度ωｒとに基づき、三相電圧指令Ｖｕ＊、Ｖｖ＊、Ｖｗ＊と三角波信号Ｔｒの位相差を表す電圧位相誤差Δθｖを変化させるように、搬送波周波数ｆｃを調整する。【選択図】図２