Motor drive control device, motor unit, and motor drive control method

• Main Authors: Hayashi, Syu, Nogamida, Wataru, Aoki, Masato, Kaidu, Hiroyuki, Asami, Takahiro
• Format: Patent
• Language: English
• Published: 13.02.2024
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

A motor drive control device 1_2 includes a target point determination unit 12_2 determining a target point P of zero crossing of a coil current Iu of a U phase based on a position detection signal Shu, a current zero crossing point estimation unit 14_2 estimating a zero crossing point Q of the coil current Iu of the U phase by detecting a change in a current direction of the coil current Iu of the U phase at a predetermined timing in every cycle of a PWM signal, an adjustment instruction signal generation unit 19_2 generating at least one of a phase adjustment instruction signal Sp for instructing phase adjustment of the coil current Iu and a frequency adjustment instruction signal Sf for instructing frequency adjustment of the PWM signal according to a phase difference Δφ between the target point P and the zero crossing point Q such that the phase difference is within a predetermined range, and a drive control signal generation unit 16_2 generating a drive control signal Sd based on at least one of the phase adjustment instruction signal Sp and the frequency adjustment instruction signal Sf.