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Synchronous motor driving device, control method for synchronous motor driving device, refrigerator-freezer, and air conditioner

Koichi Arisawa, +11 more
TLDR
In this article, the authors proposed a synchronous motor driving device with rectangular wave excitation in which any excitation width between 120° and 180° inclusive is selectable and sine wave excitations can be accomplished by one piece of circuitry, and the excitation wave form can be changed in a very short time according to driving conditions (high-efficiency driving conditions, low-noise driving conditions) required for a motor to be driven.
Abstract: 
PROBLEM TO BE SOLVED: To provide a synchronous motor driving device wherein rectangular wave excitation in which any excitation width between 120° and 180° inclusive is selectable and sine wave excitation can be accomplished by one piece of circuitry, and the excitation wave form can be changed in a very short time according to driving conditions (high-efficiency driving conditions, low-noise driving conditions) required for a synchronous motor to be driven. SOLUTION: The synchronous motor driving device is used to drive a synchronous motor through an inverter device. The driving device comprises: an output voltage vector computing means that determines the output voltage vector outputted by the inverter device according to a command value of rotational speed; a rectangular wave exciting means that outputs voltage in rectangular waveform with any excitation width between 120° and 180° inclusive according to the output voltage vector; a sine wave exciting means that outputs voltage by sine waveform excitation according to the output voltage vector; and an excitation waveform selecting means that selects an excitation method and an excitation width according to conditions required in driving the synchronous motor. COPYRIGHT: (C)2005,JPO&NCIPI

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Patent

Variable magnetic flux drive system

Kazuaki Yuuki, +2 more
TL;DR: In this paper, a variable magnetic flux motor drive system is described, which is a low-coercive permanent magnet with an inverter that drives the variable magnet and a boosting unit boosting an input DC voltage to a predetermined target value to output it to the inverter.
Patent

Variable magnetic flux motor drive system

Kazuaki Yuuki, +2 more
TL;DR: A variable magnetic flux motor drive system includes a permanent magnet motor (4), an inverter (1), and magnetization means for applying a magnetization current for controlling the magnetic flux of the permanent magnet.
Patent

Motor driving control apparatus

Tanaka Masato, +2 more
TL;DR: In this paper, the authors present a motor driving control apparatus that includes a smoothing processing unit, an insufficiency output unit, and an assist torque calculating unit that performs calculation processing of mixing the first torque value calculated by the smoothing unit and the pedal input torque in accordance with output of the insufficient output unit to calculate assist torque.
Patent

Motor drive control device

Toshifumi Yamakawa, +3 more
TL;DR: In this article, a motor drive controller (10) comprises a battery (B), a converter (12), an inverter (16), and a control unit (20) for outputting a control signal to the converter and the inverter.
Patent

Motor drive unit

Hideto Hanada, +1 more
TL;DR: In this article, a motor drive unit 100 comprises a boosting converter 12 which boosts a power supply voltage and outputs the boosted voltage; an inverter 14 which drives a motor M1 by receiving the boost voltage from the boosting converter, and a control device 30 which indicates a target value of the boosted signal to the boosting signal and determines the control system of the inverter 12 into either of rectangular wave control or non-rectangular wave control.