Title:
MOTOR DRIVING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/019121
Kind Code:
A1
Abstract:
[Problem] To provide a motor driving system of which loss is reduced further than a case where a sinusoidal wave, which is a fundamental wave, is adopted as a signal wave. [Solution] This motor driving system 1 comprises: a 3-phase inverter unit 2 which outputs a 3-phased PWM driving voltage that drives a permanent magnet synchronization motor 5; and a motor control unit 4 which controls the 3-phase inverter unit 2. This motor control unit 4 switches a pulse width at an intersection point of a carrier wave and a signal wave h(t)(=m•sin(2πf11t)+n•sin(2π•5 f1t+φ)) in which a fifth-order harmonic wave is overlapped with a fundamental sinusoidal wave g(t) and generates a PWM drive signal, supplies the PWM drive signal to the 3-phase inverter unit 2 and causes a PWM driving voltage to be output. This motor driving system 1 operates with an upper limit of an overlap ratio n/m of the signal wave h(t) and a lower limit of the overlap ratio n/m, the upper limit being a value of n/m at which a fundamental wave current If1 begins to decrease due to a change in magnetic characteristics, and the lower limit being a value of n/m at which a decrease effect of the fundamental wave current If1 is greater than an increase due to harmonic components.
Inventors:
FUJISAKI KEISUKE (JP)
NARUSE KENYA (JP)
NARUSE KENYA (JP)
Application Number:
PCT/JP2023/026631
Publication Date:
January 25, 2024
Filing Date:
July 20, 2023
Export Citation:
Assignee:
TOYOTA SCHOOL FOUND (JP)
International Classes:
H02P23/04; H02P27/08
Foreign References:
| JP2006020381A | 2006-01-19 | |||
| JP2016208668A | 2016-12-08 | |||
| JP2017147840A | 2017-08-24 |
Attorney, Agent or Firm:
SANO Hiroshi et al. (JP)
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