PROBLEM TO BE SOLVED: To provide a motor drive circuit capable of facilitating simplification of a circuit configuration while having a detection function of an insulation resistance for each segment.SOLUTION: The motor drive circuit includes: a power supply line connected with a DC power supply; an inverter whose inside is connected with the power supply line and which inverts input power into AC and outputs the AC to the motor; a voltage detection part which detects a voltage between the DC power supply and the inverter; and an insulation resistance detection part which detects an insulation resistance on subsequent stage side from an upper element included in the inverter, on the basis of a detection result of the voltage detection part in a state where at least one of the upper elements is on after an operation for detecting an insulation resistance on pre-stage side from the upper element is performed, on the basis of the detection result of the voltage detection part under a state where all the upper elements included in the inverter are off.SELECTED DRAWING: Figure 2
【課題】部分ごとに絶縁抵抗の検出を行うものでありながら、回路構成を簡素化することが容易となるモータ駆動回路を提供する。【解決手段】直流電源に接続された電源ラインと、入力側が電源ラインに接続されており、入力電力を交流に変換してモータに出力するインバータと、前記直流電源と前記インバータの間の電圧を検出する電圧検出部と、前記インバータに含まれる上素子を全てオフとさせた状態における前記電圧検出部の検出結果に基づいて、前記上素子より前段側の絶縁抵抗を検出する動作を行った後、前記上素子の少なくとも一つをオンとさせた状態における前記電圧検出部の検出結果に基づいて、前記上素子より後段側の絶縁抵抗を検出する絶縁抵抗検出部と、を備えるモータ駆動回路とする。【選択図】図2
MOTOR DRIVE CIRCUIT, MOTOR DEVICE AND ELECTRIC VEHICLE
モータ駆動回路、モータ装置、および電動車両
08.12.2016
Patent
Elektronische Ressource
Japanisch
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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