CN2229713Y

CN2229713Y - AC contactor

Info

Publication number: CN2229713Y
Application number: CN 95234106
Authority: CN
Inventors: 冯国栋; 冯勇; 王美德; 王德润; 杜焕松; 陈学升; 胡建东; 李强; 王丙信; 许兵
Original assignee: 冯国栋
Priority date: 1995-06-13
Filing date: 1995-06-13
Publication date: 1996-06-19
Anticipated expiration: 2005-06-13

Abstract

The utility model relates to an AC contactor which belongs to an electric switch operated by the change of a magnetic field and comprises an electromagnetic coil with an iron core, and a control contact and a self-holding contact which are connected to the magnetic force of the electromagnetic coil; both ends of the electromagnetic coil are connected to the output end of a bridge rectifier. One of two input ends of the bridge rectifier is directly led out, and the other is led out after connecting with a voltage reduction capacitor and a self-holding contact in series. The AC contactor has no noise of 50 rounds. The utility model can not burn out the electromagnetic coil and can save 70%-80% of electric power consumption.

Description

A.C. contactor

A.C. contactor relates to the electric switch by the change operation in magnetic field.

Present general various types of A.C. contactors, comprise iron core, be entangled in the coil on the iron core, the control contact that is connected with coil magnetic force, all be by a start button in use, one alternating voltage is connected on the coil two ends, utilizes the variation in magnetic field to make the control closing of contact of A.C. contactor, connect the power supply of electrical appliance.Above-mentioned general A.C. contactor has following deficiency;

1, produces the hazardous noise that exchanged for 50 weeks.Because the coil of A.C. contactor is an Alternating Current Power Supply, electric current is sinusoidal wave to be changed, thereby makes A.C. contactor produce drone noise, contaminated environment;

2, the many and easy burn-out coil of power consumption.For making the A.C. contactor operate as normal, need the electric current about 50MA to flow through coil usually, this is excessive keeps the heat that electric current produces, and causes waste not only at high temperature season easy burn-out coil, and to electric energy.

The purpose of this utility model be design a kind of do not have exchange 50 all noises, power consumption less and the coil A.C. contactor of easy burn-out not.

This A.C. contactor comprises the solenoid of ribbon core, the control contact and the self holding contact that are connected with this solenoid magnetic force, its design feature is that the two ends of this solenoid are connected with the output of a full-wave rectifier, two inputs of this full-wave rectifier, one end is directly drawn, and draws behind other end series connection decompression capacitor and the self holding contact.

When mounted, connect power firestreak behind the input termination zero-power line that full-wave rectifier is directly drawn, another input tandem promoter button and the cut-off push button, wherein start button is connected in parallel on the two ends of the series loop that is made of decompression capacitor and self holding contact.

Because cut-off push button is closure state under normal conditions, start button is off-state under normal conditions, therefore, in use, press start button, connect the power supply of full-wave rectifier, the direct voltage of this full-wave rectifier output is added in the two ends of solenoid, produce direct current in the solenoid, this direct current produces magnetic potential, magnetic potential is amplified through iron core, magnetic flux density is increased, produce the suction more than 10 kilograms, to control contact and self holding contact closure, the control closing of contact is connected the electrical appliance power supply, the closed power supply of connecting the full-wave rectifier of this A.C. contactor of self holding contact, at this moment, unclamp start button, the power supply of full-wave rectifier is to pass through decompression capacitor, self holding contact and cut-off push button are connected, decompression capacitor is selected numerical value according to 70%-80% the step-down rate that reduces supply voltage, after the supply voltage step-down, has only 20%-30% voltage to be added in the two ends of solenoid after the full-wave rectifier rectification, the direct current that is produced and the magnetic flux density that generates can make control contact and self holding contact adhesive to keep completely.When electrical appliance stops electricity consumption, only need to disconnect stop button and get final product.

This A.C. contactor has following characteristics

Press with full when 1, starting, make control contact and self holding contact closed strong reliable, action is clear-cut, has avoided general A.C. contactor because of the contact arcing discharge that the chatter transient process causes, and has prolonged contact endurance;

2, start after because the non-power consumption hypotensive effect of decompression capacitor can be saved 70-80% electric energy,, thereby can not burn out solenoid because the heat that solenoid produced of ribbon core significantly reduces;

3, solenoid is direct current supply, has eliminated the hazardous noise that exchanged for 50 weeks.

The embodiment of this A.C. contactor provides in conjunction with the accompanying drawings, accompanying drawing provides be the circuit structure schematic diagram of embodiment and when using with the annexation figure of outside line, wherein the interior part of dotted line is the circuit structure schematic diagram

In the present embodiment, A.C. contactor comprises the solenoid 2 of ribbon core 1, and with control contact 3 and the self holding contact 4 that these solenoid 2 magnetic force are connected, the two ends of solenoid 2 are connected with G, the F output of full-wave rectifier 6, full-wave rectifier 6 is bridge rectifiers, by diode D ₁-D ₄Constitute, two inputs of the D of full-wave rectifier 6, E, the E end is directly drawn, and draws behind D end series connection decompression capacitor 5 and the self holding contact 4.Among the figure, AN ₁Be start button, AN ₂Be cut-off push button, M is for using electric loading, AN ₁Be connected in parallel on the two ends of the series loop of decompression capacitor 5 and self holding contact 4 formations.

Claims

1, a kind of A.C. contactor, the solenoid (2) that comprises ribbon core (1), the control contact (3) and the self holding contact (4) that are connected with this solenoid (2) magnetic force, the two ends that it is characterized in that this solenoid (2) are connected with the output of a full-wave rectifier (6), two inputs of this full-wave rectifier (6), one end is directly drawn, and draws behind other end series connection decompression capacitor (5) and the self holding contact (4).

2,, it is characterized in that full-wave rectifier (6) is a bridge rectifier according to the said A.C. contactor of claim 1.