A motor current sampling circuit and a motor current sampling method

Abstract

The present application relates to the technical field of current sampling, and particularly relates to a motor current sampling circuit. The circuit comprises a motor output module, a sampling module, an offset signal generation module, a signal amplification module, a rectification filtering module and an MCU microcontroller. The first end of the sampling module is electrically connected to one end of the motor output module, and the second end of the sampling module is electrically connected to the first end of the signal amplification module. One end of the offset signal generation module is electrically connected to the second end of the signal amplification module. The third end of the signal amplification module is electrically connected to the first end of the rectification filtering module. The second end of the rectification filtering module is electrically connected to the MCU microcontroller. The present application can process the triangular waveform signal output by the motor, so that the processed waveform signal is more suitable for the MCU microcontroller processing, thereby reducing the calculation burden of the MCU microcontroller.