Permanent magnet double-coil contactor control circuit and control method thereof
A technology for controlling circuits and contactors, applied to circuits, electromagnetic relays, detailed information of electromagnetic relays, etc., can solve the problems of slow on-off speed, easy damage, and long response time of contactors, and achieve the effect of fast on-off speed
Inactive Publication Date: 2018-03-09
山西埃斯曼电气科技有限公司
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Problems solved by technology
[0003] However, the existing control circuit controls a single coil, and the control circuit provides two opposite DC currents, that is, the pull-in current and the disconnection current. The two currents act on the same coil, the reaction time is long, and the contactor's on-off speed is slow. Two kinds of direct current repeatedly act on the same coil, causing the coil to heat up and age seriously, and it is easy to be damaged
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[0015] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0016] Such as figure 2 and 3 As shown, the control circuit 8 includes a rectifier circuit connected in parallel and a surge suppression, filtering and protection circuit; a series circuit of a voltage comparison circuit one, a thyristor one, and a pull-in coil connected in sequence, and the series circuit is connected in parallel with a filter Circuit 1; sequentially connected energy storage and voltage stabilization circuit, voltage comparison circuit 2, triode amplifier circuit, thyristor 2, release coil circuit, the circuit is...
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The invention belongs to the technical field of contactors and in particular relates to a permanent magnet double-coil contactor control circuit and a control method thereof. The permanent magnet double-coil contactor control circuit comprises a rectification circuit and a surge suppression, filtering and protection circuit, which are connected in parallel; a series circuit is formed by connectinga voltage comparison circuit I, a silicon controlled rectifier I and a suction coil in sequence and the series circuit is connected with a filtering circuit I; a circuit is formed by connecting an energy storage and voltage stabilization circuit, a voltage comparison circuit II, a triode amplification circuit, a silicon controlled rectifier II and a releasing coil in sequence and the circuit is connected with a filtering circuit II in parallel; and the surge suppression, filtering and protection circuit is connected with the voltage comparison circuit I and the energy storage and voltage stabilization circuit respectively. Compared with a single-coil permanent magnet alternating-current contactor, an on-off speed is high and the coils have longer service life and are not easy to burn out.
Description
technical field [0001] The invention belongs to the technical field of contactors, and in particular relates to a permanent magnet double-coil contactor control circuit and a control method thereof. Background technique [0002] The permanent magnet contactor is a new type of low-voltage switching appliance. It uses the working principle of electromagnetic operation and permanent magnet retention to overcome the shortcomings of the traditional electromagnetic contactor, such as high energy consumption, large operating noise, and great influence on the grid voltage. Very good energy saving effect. [0003] However, the existing control circuit controls a single coil, and the control circuit provides two opposite DC currents, that is, the pull-in current and the disconnection current. The two currents act on the same coil, the reaction time is long, and the contactor's on-off speed is slow. The two kinds of direct current repeatedly act on the same coil, causing the coil to h...
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IPC IPC(8): H01H47/02H01H50/44
Inventor 张莉萍
Owner 山西埃斯曼电气科技有限公司