CONTROL APPARATUS
To provide a control apparatus that controls operation of an inverter which drives a dynamo-electric motor on the basis of the position of a rotator estimated from a phase of an expansion induction voltage of the dynamo-electric motor, and that suppresses deterioration in controllability of the dyna...
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Main Authors | , , , , , |
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Format | Patent |
Language | English Japanese |
Published |
09.04.2024
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Subjects | |
Online Access | Get full text |
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Summary: | To provide a control apparatus that controls operation of an inverter which drives a dynamo-electric motor on the basis of the position of a rotator estimated from a phase of an expansion induction voltage of the dynamo-electric motor, and that suppresses deterioration in controllability of the dynamo-electric motor.SOLUTION: A current flowing in each phase of a dynamo-electric motor M is converted into a d-axis current and a q-axis current by using a position θ^ of a rotator estimated from a phase of an expansion induction voltage of the dynamo-electric motor M. A high-frequency signal is superimposed on a d-axis current command value Id*, and the d-shaft current command value Id* is offset so that magnetic saturation occurs in the d-axis to generate an offset d-axis current command value Id* '. The d-axis current command value Id* is calculated such that a difference between a d-axis current Id and the offset d-axis current command value Id* ' is small, and a q-axis voltage command value Vq* is calculated such that a difference between a q-axis current Iq and a q-axis current command value Iq* is small. By using the position θ^, the d-axis voltage command value Vd* and the q-axis voltage command value Vq* are converted to voltage command values Vu*, Vv*, and Vw*.SELECTED DRAWING: Figure 1
【課題】電動機の拡張誘起電圧の位相により推定される回転子の位置に基づいて電動機を駆動させるインバータの動作を制御する制御装置において、電動機の制御性低下を抑制する。【解決手段】電動機Mの拡張誘起電圧の位相により推定される回転子の位置θ^を用いて電動機Mの各相に流れる電流をd軸電流及びq軸電流に変換し、d軸電流指令値Id*に高周波信号を重畳させるとともに、d軸において磁気飽和が起きるようにd軸電流指令値Id*をオフセットさせてオフセットd軸電流指令値Id*´を生成し、d軸電流Idとオフセットd軸電流指令値Id*´との差が小さくなるようにd軸電圧指令値Vd*を算出するとともに、q軸電流Iqとq軸電流指令値Iq*との差が小さくなるようにq軸電圧指令値Vq*を算出し、位置θ^を用いてd軸電圧指令値Vd*及びq軸電圧指令値Vq*を電圧指令値Vu*、Vv*、Vw*に変換する。【選択図】図1 |
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Bibliography: | Application Number: JP20220155196 |