System and method for reducing electromagnetic interference of equipment based on pulse modulation circuit

Abstract

The invention discloses a system and a method for reducing electromagnetic interference of equipment based on a pulse modulation circuit. The system comprises strong current equipment, electromagneticradiation monitoring equipment, a pulse modulation circuit and a linear motor; the strong current equipment generates electromagnetic radiation; the electromagnetic radiation monitoring equipment isused for monitoring the electromagnetic radiation generated by the strong current equipment so as to obtain first electromagnetic radiation quantity; the first electromagnetic radiation quantity is compared with a radiation quantity threshold value; and the pulse modulation circuit is used for controlling the linear motor through the pulse modulation circuit when the first electromagnetic radiation quantity is equal to the radiation quantity threshold value. According to the system, the linear motor is driven by the driving mode of the pulse width modulation circuit, so that the problem of internal interference of strong current to weak current is solved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic interference, and in particular relates to a system and method for reducing electromagnetic interference of equipment based on a pulse modulation circuit. Background technique [0002] Electromagnetic compatibility refers to the ability of a device or system to operate in accordance with the requirements in its electromagnetic environment without causing unbearable electromagnetic interference to any equipment in its environment. The electromagnetic compatibility of complex systems has always been a difficult problem to be solved in the engineering field. Electromagnetic interference is generally radiated through space and conducted through wires. When electromagnetic interference occurs when multiple electronic devices are mixed, it is more complicated to determine the source of interference. The traditional method It is to deal with the wire and cable, signal cable and the leakage of the...

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Problems solved by technology

The traditional method is to deal with wires and cables, signal cables and shield leakage to weaken radiation and conduction. However, the special equipment has not achieved the expected effect of eliminating internal electromagnetic interference. The instantaneous drive current of the switch is too large, and the switching process is also It will increase electromagnetic leakage, and there is still a need to improve the design to eliminate electromagnetic interference, and drive the motor more smoothly

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