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Patent Searching and Data


Title:
MOTOR CONTROL DEVICE, VACUUM CLEANER, AND HAND DRYER
Document Type and Number:
WIPO Patent Application WO/2017/077599
Kind Code:
A1
Abstract:
Provided is a motor control device that outputs a drive signal to a single-phase inverter for driving a single-phase motor, the motor control device performing PWM control on the single-phase inverter on the basis of a detected value of a motor current flowing to the single-phase motor. The motor control device executes synchronous PWM control in which a carrier is synchronized to the phase of a voltage command, and asynchronous PWM control in which the carrier is not synchronized to the phase of the voltage command, and the motor control device switches from asynchronous PWM control to synchronous PWM control according to an increase in the number of rotations of the motor. In the operation sections in which asynchronous PWM control and synchronous PWM control are executed, the carrier frequency used for asynchronous PWM control and synchronous PWM control is set to be lower than an upper limit frequency which is the upper limit of the carrier frequency.

Inventors:
YAMAKAWA TAKASHI (JP)
TAKAYAMA YUJI (JP)
UEMURA KEISUKE (JP)
SHINOMOTO YOSUKE (JP)
Application Number:
PCT/JP2015/081041
Publication Date:
May 11, 2017
Filing Date:
November 04, 2015
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P25/04; H02P27/08
Foreign References:
JPS5510834A1980-01-25
JP2009207261A2009-09-10
JP2015053824A2015-03-19
JP2015172473A2015-10-01
JP2015000342A2015-01-05
JP2007209394A2007-08-23
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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