Method for effectively solving in-phase interference of contactor and microcontroller

A microcontroller and contactor technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of unclear interference types in circuits, differential mode noise oscilloscope observation, and unsatisfactory processing effects, etc., to achieve wide application, Improved reliability and low cost
CN103401414AInactive Publication Date: 2013-11-20XUCHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XUCHANG UNIV
Publication Date
2013-11-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for effectively solving in-phase interference of a contactor and a microcontroller and solves the in-phase interference of the contactor and the microcontroller through designing a noise processing circuit. Before an alternating current power supply passes through a bridge rectifier circuit, high-frequency noise and differential mode noise in the alternating current are removed through a capacitance network and a choking coil; after the voltage subjected to high-frequency noise and differential mode noise filtering passes through inductance and capacitance networks, rest high-frequency interference signals and common-mode noise in the current are removed, and the voltage supplies electricity to an MCU (micro control unit); and a TVS (transient voltage suppressor) diode is switched into the power supply end of the MCU, and the impact of surge current such as lightning and charges on a machine case is effectively inhibited. The method has the advantages that the cost is low, the application is wide, and the work is reliable.
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Description

technical field

[0001] The invention relates to a method for effectively solving the in-phase interference between a contactor and a microcontroller. Background technique

[0002] Where large motors need to be controlled, the contactor and the controller are usually powered in the same phase and installed in the same box. The action of the contactor generates strong electromagnetic interference and noise. Coupled with the frequent start and stop of heavy machinery on the job site, a large amount of harmonics are injected into the power grid. Waves will cause problems such as microcontroller (MCU) reset, crash and display garbled characters. Through scientific circuit design and ingenious circuit arrangement, the invention well solves the problem that the contactor and microcontroller (MCU) cannot work due to the interference caused by the same phase power supply.

[0003] Heavy machinery such as construction sites, ports, and docks start and stop frequently. The start and s...

Claims

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