Capacitor charging and discharging model-based motor relative case short circuit detection system and detection method thereof
The invention relates to the technical field of motor driving and fault detection, in particular to a system and a method for detecting short circuit of a motor relative to a casing based on a capacitor charging and discharging model. The system further comprises a Y capacitor charging and dischargi...
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Main Authors | , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
20.05.2022
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Subjects | |
Online Access | Get full text |
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Summary: | The invention relates to the technical field of motor driving and fault detection, in particular to a system and a method for detecting short circuit of a motor relative to a casing based on a capacitor charging and discharging model. The system further comprises a Y capacitor charging and discharging model operation module, a PWM wave sending module, a three-phase bridge driving module, a current sampling module and a fault detection and protection module. The method comprises the following specific detection steps: S51, constructing a Y capacitor charging and discharging model; s52, operating key parameters of the short-circuit model; s53, a PWM (pulse width modulation) initialization component; s54, PWM (Pulse Width Modulation) state machine control; s55, carrying out PWM key parameter operation; s56, a PWM wave sending module; s57, a three-phase bridge driving module; s58, a current sampling circuit; s59, a sigma-delta sampler and a demodulator; s510, judging whether a fault exists at present or not; s511 |
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Bibliography: | Application Number: CN202210031456 |