INVERTER CONTROLLER
To provide an inverter controller which can improve torque responsiveness when control transits from PWM control to rectangular wave control.SOLUTION: An inverter controller 20 is configured to switch PWM control and rectangular wave control, and comprises a rectangular wave control unit 40 and a PW...
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Sprache: | eng ; jpn |
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Zusammenfassung: | To provide an inverter controller which can improve torque responsiveness when control transits from PWM control to rectangular wave control.SOLUTION: An inverter controller 20 is configured to switch PWM control and rectangular wave control, and comprises a rectangular wave control unit 40 and a PWM control unit 30. The PWM control unit 30 has: a voltage vector absolute value calculation unit 33 which calculates an absolute value Vdq of a voltage vector Bv on the basis of a table in which a preliminarily stored torque command value Tref is associated with the absolute value Vdq of the voltage vector Bv; a PI control unit 34 which calculates a torque difference value ΔT, an angle θ to be formed by the voltage vector and a q-axis; a command value calculation unit 35 which calculates a d-axis voltage command value Vd* and a q-axis voltage command value Vq* by the absolute value Vdq of the voltage vector Bv and the angle θ; a voltage command value determination unit 36 which calculates three-phase voltage command values Vu, Vv and Vw; and a PWM control signal generation unit 37 which generates a PWM control signal S1.SELECTED DRAWING: Figure 1
【課題】PWM制御から矩形波制御に移行したときのトルク応答性を向上させることができるインバータ制御装置を提供すること。【解決手段】PWM制御と矩形波制御とを切り替えるようにしたインバータ制御装置20であって、矩形波制御部40と、PWM制御部30と、を備え、PWM制御部30は、予め記憶したトルク指令値Trefと電圧ベクトルBvの絶対値Vdqとを対応付けたテーブルに基づいて電圧ベクトルBvの絶対値Vdqを演算する電圧ベクトル絶対値演算部33と、トルク差分値ΔT前記電圧ベクトルとq軸とのなす角度θを演算するPI制御部34と、電圧ベクトルBvの絶対値Vdq及び角度θによってd軸電圧指令値Vd*及びq軸電圧指令値Vq*を演算する指令値演算部35と、三相電圧指令値Vu,Vv,Vwを演算する電圧指令値決定部36と、PWM制御信号S1を生成するPWM制御信号生成部37と、を有している。【選択図】図1 |
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