Title:
MOTOR DRIVING DEVICE AND OUTDOOR UNIT OF AIR CONDITIONER USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/213453
Kind Code:
A1
Abstract:
Provided is a motor driving device that can reduce noise and vibration caused by mechanical resonance without requiring preadjustment such as a preliminary test and has high versatility adaptable to various motors. The motor driving device is characterized by comprising: a power conversion circuit that drives a permanent magnet synchronous motor; a control unit that controls the power conversion circuit; and a current sensor that detects a three-phase current supplied to the permanent magnet synchronous motor, wherein the control unit comprises a three-phase/dq conversion unit that converts a detected three-phase current detected by the current sensor into a d-axis detection current and a q-axis detection current, a command voltage calculation unit that calculates a command voltage contributing to driving of the permanent magnet synchronous motor, a torque pulsation suppression control unit that calculates a voltage correction command contributing to reduction of the pulsation torque of the permanent magnet synchronous motor on the basis of a preset value related to a distortion component in the induced voltage of the permanent magnetic synchronous motor, a parameter estimation unit that corrects the preset value so as to reduce a pulsation component in at least one of the d-axis detection current and the q-axis detection current, and an addition unit that adds the command voltage and the voltage correction command.
Inventors:
NAKAO NORIYA (JP)
TOBARI KAZUAKI (JP)
TAKAOKA MIDORI (JP)
SUGINO TOMOHIRO (JP)
TOBARI KAZUAKI (JP)
TAKAOKA MIDORI (JP)
SUGINO TOMOHIRO (JP)
Application Number:
PCT/JP2020/015521
Publication Date:
October 22, 2020
Filing Date:
April 06, 2020
Export Citation:
Assignee:
HITACHI POWER SEMICONDUCTOR DEVICE LTD (JP)
International Classes:
H02P21/05; H02P21/14; H02P21/22; H02P21/24
Foreign References:
| JP2006191737A | 2006-07-20 | |||
| JP2012244735A | 2012-12-10 | |||
| JPH0698596A | 1994-04-08 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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