Title:
洗濯機のモータ駆動装置
Document Type and Number:
Japanese Patent JP6681554
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To achieve a washing machine motor drive device that can reduce noise by generating a sound wave with an opposite phase to the noise in the washing machine motor drive device to perform a sensorless inverter drive of a motor.SOLUTION: The washing machine motor drive device includes: a first inverter circuit 7 that converts DC power into AC power; a washing motor 4 that is driven by the first inverter circuit 7; current detecting means that detects electric current in the washing motor 4; position detection voltage control means that generates voltage for position detection in the washing motor 4; rotation position detecting means that detects a rotation position of the washing motor 4 from a change of motor current when generating the voltage for position detection in the washing motor 4; a second inverter circuit 12; a noise reduction motor 13 that is driven by the second inverter circuit 12; and noise reduction control means 14 that controls the noise reduction motor 13. The noise reduction control means 14 can reduce noise by generating a sound wave with an opposite phase to the noise by outputting voltage with an opposite phase to the voltage for position detection in the washing motor 4.SELECTED DRAWING: Figure 6
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Inventors:
Hirotomo Fujioka
Hiroshi Nakao
Hiroshi Nakao
Application Number:
JP2017031149A
Publication Date:
April 15, 2020
Filing Date:
February 22, 2017
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
H02P5/52; D06F33/30; H02M7/48
Domestic Patent References:
| JP2007325406A | ||||
| JP2010051078A | ||||
| JP2015050804A | ||||
| JP2004343822A | ||||
| JP2008233490A | ||||
| JP2008023805A |
Attorney, Agent or Firm:
Kenji Kamada
Koichi Nomura
Koichi Nomura