VOLTAGE DETECTION DEVICE

To provide a voltage detection device capable of measuring the voltage of a driving circuit with a simple circuit configuration.SOLUTION: The voltage Vcc of an inverter 8 for driving a motor 7 is detected. The voltage detection device includes resistances 10, 11, 12, an inverter 8, ADCs 41, 42, 43,...

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Bibliographic Details
Main Author NOZAKI MITSUHIRO
Format Patent
LanguageEnglish
Japanese
Published 10.10.2019
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Summary:To provide a voltage detection device capable of measuring the voltage of a driving circuit with a simple circuit configuration.SOLUTION: The voltage Vcc of an inverter 8 for driving a motor 7 is detected. The voltage detection device includes resistances 10, 11, 12, an inverter 8, ADCs 41, 42, 43, and a control unit. The resistances 10, 11, 12 are respectively connected in series with the u-, v-, w-phases of the motor 7. The inverter 8 applies, at a prescribed cycle, a pulse voltage to, among the phases, the u-phase and v-phase which do not arise from rotation of the motor 7. The ADC 41 detects current Iuv flowing through the resistance 10 connected with the u phase when the inverter 8 applies the pulse voltage. The control unit detects the voltage Vcc of the inverter 8 on the basis of the current Iuv detected by the ADC 41, the resistance 10, the resistance 11 connected with the v-phase, and the internal resistance of the motor 7.SELECTED DRAWING: Figure 2 【課題】駆動回路の電圧を簡易な回路構成で測定できる電圧検出装置を提供することである。【解決手段】モータ7を駆動するインバータ8の電圧Vccを検出する。電圧検出装置は、抵抗10、11、12、インバータ8、ADC41、42、43、制御部を備える。抵抗10、11、12、は、モータ7のu、v、w各相に直列に接続する。インバータ8は、各相のうちでモータ7の回転に起因しない相であるu相とv相の間に所定周期でパルス電圧を印加する。ADC41は、インバータ8がパルス電圧を印加した時、u相に接続した抵抗10に導通する電流Iuvを検出する。制御部は、ADC41により検出した電流Iuvと、抵抗10、v相に接続した抵抗11、及びモータ7の内部抵抗とに基づき、インバータ8の電圧Vccを検出する。【選択図】図2
Bibliography:Application Number: JP20180061025