Circuit with EMC

Abstract

The invention discloses a circuit with EMC. The circuit with EMC is applied to a motor to improve the EMC performance of the motor. The circuit comprises at least one multilayer ceramic capacitor andat least one energy storage filtering element; an electric conductor is connected with the multilayer ceramic capacitor and the energy storage filtering element; the multilayer ceramic capacitor comprises a first common-mode capacitor, a second common-mode capacitor and a differential mode capacitor; the first common-mode capacitor and the second common-mode capacitor are electrically connected inparallel between the positive electrode and negative electrode of the motor; the energy storage filtering element comprises a first differential mode inductor and a second differential mode inductor;the differential mode capacitor is electrically connected in parallel between the positive electrode and the negative electrode of the motor; the first differential mode inductor and the second differential mode inductor are directly connected to the two electrodes of the motor; and the circuit with the EMC further comprises a piezoresistor, so that the EMC performance of the motor is effectivelyimproved.

Description

technical field [0001] The invention relates to a circuit of a motor, more specifically to a circuit with EMC applied to the motor. Background technique [0002] As a necessary component to generate driving torque, the motor realizes the conversion or transmission of electric energy based on electromagnetic induction. In the actual electrical mechanism, the electromagnetic induction between various operating electric equipment is related to each other and affects each other. To a certain extent, it will affect the The operating equipment and personnel produce certain interference and hazards. Therefore, people put forward the concept of EMC (Electro Magnetic Compatibility), that is, electromagnetic compatibility, which refers to the ability of a device or system to operate in compliance with the requirements in its electromagnetic environment and not produce unbearable electromagnetic interference to any equipment in its environment. [0003] On the one hand, the EMC means ...

AI Technical Summary

Problems solved by technology

[0005] In particular, there are a variety of motors and other electrical components in the current automotive system. When the EMC performance of the motor or other electrical components is low, the probability of each motor or other electrical components due to electromagnetic interaction is increased, which increases the number of components in the automotive system. The probability of damage and failure of some electrical components is detrimental to the safety of drivers and pedestrians, so the need to improve the EMC index is imminent

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