AC MOTOR CONTROL DEVICE AND CLEANER USING THE SAME

To provide an AC motor control device capable of suppressing a shock due to switching of a pulse mode so as to stably perform a high-speed drive of an AC motor.SOLUTION: An AC motor control device includes: an AC motor; a power converter for supplying a three-phase AC voltage; a current detector for...

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Bibliographische Detailangaben
Hauptverfasser:	HADINATA AGNES, RI TOSHO, NIWA AKIO, YOSHINO TOMOYA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROL OR REGULATION THEREOF CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	To provide an AC motor control device capable of suppressing a shock due to switching of a pulse mode so as to stably perform a high-speed drive of an AC motor.SOLUTION: An AC motor control device includes: an AC motor; a power converter for supplying a three-phase AC voltage; a current detector for detecting a current signal of the power converter; and a controller for controlling the power converter so as to obtain a desired rotation speed of the AC motor based on the current signal detected by the current detector. In the AC motor control device, the controller includes: a current processor for generating a reproduction current from the current signal; a PWM signal generator for generating a pulse of a PWM switching signal to switch a switching element; a synchronization PWM controller for switching a pulse mode of the PWM switching signal in response to the rotation speed of the AC motor; and a current detection value corrector for generating a correction current of almost the same amplitude value before/after switching of the pulse mode by calculation of a gain value corresponding to the pulse mode and the reproduction current.SELECTED DRAWING: Figure 10 【課題】パルスモードの切り替えによるショックを抑制し、交流モータを安定的に高速駆動できる交流モータ制御装置を提供する。【解決手段】交流モータと、三相交流電圧を供給する電力変換器と、電力変換器の電流信号を検出する電流検出器と、電流検出器が検出した電流信号に基づいて交流モータが所望の回転速度となるように電力変換器を制御する制御器と、を備えた交流モータ制御装置であって、制御器は、電流信号から再現電流を生成する電流処理器と、スイッチング素子をスイッチングさせるＰＷＭスイッチング信号のパルスを生成するＰＷＭ信号生成器と、交流モータの回転速度に応じてＰＷＭスイッチング信号のパルスモードを切り替える同期ＰＷＭ制御器と、パルスモードに応じたゲイン値と再現電流の演算により、パルスモードの切り替え前後で同程度の振幅値の補正電流を生成する電流検出値補正器と、を備えることを特徴とする交流モータ制御装置。【選択図】図１０