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Constant-magnetic maintaining AC contactor control circuit and control method thereof

A technology for AC contactors and control circuits, applied in circuits, relays, electrical components, etc., can solve the problems of long charging and discharging pulse time, inability to completely extinguish the arc, and low reliability, so as to avoid heavy pull-in and improve safety performance , to avoid the effect of arc short circuit

Active Publication Date: 2013-08-14
沈阳欧诺尔电器有限公司
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AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of complex structure, high energy consumption, long charge and discharge pulse time, low reliability, slow response speed, and inability to completely extinguish the arc in the existing control circuit, the present invention provides a simple structure, low cost, working Low energy consumption, easy installation, high safety performance, strong reliability, fast response, intelligent energy-saving control circuit based on microprocessor MCU

Method used

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  • Constant-magnetic maintaining AC contactor control circuit and control method thereof
  • Constant-magnetic maintaining AC contactor control circuit and control method thereof

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Embodiment Construction

[0017] The energy-saving constant magnetic holding AC contactor control circuit of the present invention ( figure 1 ) is composed of a power supply and detection module 101, a control and drive module 102, and an execution module 103. The periphery adopts a three-wire system, and is externally connected with a normally open start switch SW1 and a normally closed stop switch SW2. The power supply and detection module 101 generates the stable direct current required by the circuit; when the start switch SW1 is pressed, the level of the input signal KG of the P2 port of the microprocessor MCU is reversed, changing from high level to low level; When the stop switch SW2 is turned off, the input signal ST of the P3 port of the microprocessor MCU is flipped from high level to low level. When the input signal KG is high level, the microprocessor MCU has no output signal; when the input signal KG is low level, the P0 port of the microprocessor MCU outputs low level, and the relay J1 co...

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Abstract

The invention discloses a constant-magnetic maintaining AC contactor control circuit and a control method thereof. The control circuit comprises a power source and detection module, a control and driver module and an execution module, wherein a three-wire system is adopted at the periphery of the control circuit; the control circuit is connected to a normally-opened start switch and a normally-closed stop switch externally; the control and driver module comprises a micro control unit (MCU), a first drive circuit, a second drive circuit, a relay coil J1 and a relay coil J2; and the execution module comprises an inductor L1, a rectifier bridge BD1, a capacitor C1, a capacitor C2, a diode D1, a diode D2, five contact terminals of the relay coil J1, five contact terminals of the relay coil J2 and a contactor coil. The control circuit provided by the invention is simple in structure, low in cost, small in work energy consumption, convenient for installation, high in safety, strong in reliability and quick in reaction speed.

Description

technical field [0001] The invention relates to a constant magnetic holding AC contactor, in particular to an energy-saving constant magnetic holding AC contactor control circuit and a control method based on microprocessor MCU control, belonging to the field of electrical engineering. Background technique [0002] AC contactor is one of the main electrical products with large output and wide use in electrical equipment. Its main control objects are various electrical equipment such as motors, transformers, lighting, and resistance furnaces. Its applications involve industry, agriculture, and transportation. , commerce, people's lives and all aspects of the national economy. The biggest difference between the permanent magnet holding AC contactor and the traditional electromagnetic mechanism in structure is that the coil can realize the holding function of the pull-in position without energizing after pull-in, which has high reliability and remarkable energy-saving effect. ...

Claims

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Application Information

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IPC IPC(8): H01H47/02
Inventor 潘天红谢华盛占石
Owner 沈阳欧诺尔电器有限公司
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