Low EMI motor driving circuit

Abstract

The invention relates to the technical field of motor driving circuits, in particular to a low EMI motor driving circuit. The low EMI motor driving circuit comprises a motor coil and an EMI sensor which is arranged on the part, close to the motor coil, of a motor driver. The output end of a sensor circuit of the EMI sensor is connected with the input end of a time-domain and frequency-domain switching circuit. The output end of the time-domain and frequency-domain switching circuit is connected with the input end of a subtraction circuit. The input end of the subtraction circuit is further connected with the output end of a pre-set frequency spectrum circuit. The output end of the subtraction circuit is connected with the input end of an integral circuit. The output end of the integral circuit is connected with the input end of a frequency jittering circuit. The input end of the frequency jittering circuit is further connected with the output end of a PWM circuit. The output end of the frequency jittering circuit is connected with the input end of an H-bridge driving circuit. The output end of the H-bridge driving circuit is connected with the input end of an H-bridge circuit. The output end of the H-bridge circuit is connected with the motor coil. Running is stable, the energy consumption is low, and the damage is low.

Description

technical field [0001] The invention relates to the technical field of motor drive circuits, in particular to a low EMI motor drive circuit. Background technique [0002] The motor will generate EMI (electromagnetic interference) when it is working, which will cause certain harm to the surrounding electronic equipment and personnel, especially the instability of the motor during work, which will easily form super strong EMI (electromagnetic interference) and cause damage to equipment and Personnel cause great damage, and the existing drive circuits all have the above-mentioned problems, and a motor drive circuit that operates more stably and can maintain lower EMI is needed. Contents of the invention [0003] An object of the present invention is to provide a low-EMI motor drive circuit that operates stably, consumes less energy, and is less harmful. [0004] The above-mentioned technical purpose of the present invention is achieved by the following technical scheme: a ki...

AI Technical Summary

Problems solved by technology

[0002]The motor will generate EMI (electromagnetic interference) when it is working, which will cause certain harm to the surrounding electronic equipment and personnel, especially the instability of the motor during work. It is very easy to form super strong EMI (electromagnetic interference) and cause great damage to equipment and personnel. The existing drive circuits have the above problems, and a motor drive circuit with more stable operation and low EMI is needed.

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