WASHING MACHINE MOTOR DRIVE DEVICE

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 incl...

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Bibliographic Details
Main Authors NAKAO HIROSHI, FUJIOKA HIROTOMO
Format Patent
LanguageEnglish
Japanese
Published 30.08.2018
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Summary: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 【課題】モータをセンサレスにてインバータ駆動する洗濯機のモータ駆動装置において、騒音とは逆位相の音波を発生させて騒音を低減できる洗濯機のモータ駆動装置を実現する。【解決手段】直流電力を交流電力に変換する第1のインバータ回路7と、第1のインバータ回路7により駆動する洗濯モータ4と、洗濯モータ4の電流を検出する電流検出手段と、洗濯モータ4の位置検出用電圧を発生させる位置検出電圧制御手段と、洗濯モータ4の位置検出用電圧発生時のモータ電流変化から洗濯モータ4の回転位置を検出する回転位置検出手段と、第2のインバータ回路12と、第2のインバータ回路12により駆動する消音用モータ13と、消音用モータ13を制御する消音制御手段14とを備え、消音制御手段14は洗濯モータ4の位置検出用電圧と逆位相の電圧を出力することにより、騒音とは逆位相の音波を発生させて騒音を低減することができる。【選択図】図6
Bibliography:Application Number: JP20170031149