CN2138343Y - Non-contact energy saving coil of AC contactor - Google Patents

Abstract

The utility model relates to a non-contact energy saving coil for AC contactors. The non-contact energy saving coil is composed of a transformer, bidirectional thyristor time delay switch loops, rectifying bridge loops and an AC contactor coil, wherein, the rectifying bridge loop (D[2]-D[7]) and the bidirectional thyristor time delay loop (D[1], R[1], R[2], C1 and SCR[1]) are all made into a circuit board which is fixed in a shell body together with the AC contactor coil and the transformer and is mutually connected with a power supply through two connection points (1) and (2). The bidirectional thyristor time delay switch loop replaces mechanical contact points to finish attraction and conversion, and the energy saving coil is made to have long lifetime, convenient conversion, obvious energy saving effect and little energy consumption.

Description

Non-contact energy saving coil of AC contactor

The utility model relates to a kind of interchange and contacts contactless energy-saving coil, can realize the contactless power-saving running of A.C. contactor.

In order to make A.C. contactor carry out power-saving running, the data of home and abroad discloses multiple electricity-saving appliance.Various electricity-saving appliances are concluded two kinds, that is: condenser type and transformer type are two kinds.No matter finish the moving and maintenance conversion of suction but which kind of electricity-saving appliance all be unable to do without the use mechanical contact.Though all kinds of electricity-saving appliances are all comparatively effective on the function of economize on electricity.But utilize mechanical contact to finish to inhale moving and keep conversion that bigger shortcoming is arranged.For example the electricity-saving appliance of transformer type must be by DC start, direct current sticking after the bridge circuit rectification.Because direct-current arc than alternating current arc length, has been quickened burning of contact.Even utilize the travel switch conversion of double break point, its life-span also is limited.Under the situation that needs frequently cut-off, make the life-span of electricity-saving appliance also be subjected to certain restriction.

The purpose of this utility model is: eliminate the disadvantage of utilizing mechanical contact in the energy-saving coil and bringing the life-span weak point, develop long contactless energy-saving coil of a kind of life-span.

Scheme of the present utility model is: ac contactor coil provides the DC operation mode by the secondary coil of bridge type return and transformer.Two terminations of power supply and the two ends of transformer L1 join, and one of them termination and rectifier bridge loop join, and the direct current that constitutes coil JC starts the loop.Another termination of power supply and the common point of transformer solid circles join by a delay switch loop of being made up of R1, R2, D1, C1 and bidirectional triode thyristor SCR1 and the inferior coil L2 of transformer.Interchange contact coil, bridge rectifier loop, transformer B, bidirectional triode thyristor timing circuit all are contained in the housing bone, and two outer contacts (1), (2) join by QA, TA and power supply.Wherein, the delay switch loop has replaced the mechanical contact conversion.Because above-mentioned switch loop is arranged, conversion is convenient, and all components and parts can be concentrated easily and be fitted together.

The utility model do not touch switch and replaces contact switch with there being point, eliminated all unfavorable that mechanical contact brings, and the life-span of energy-saving coil is improved.The power savings of coil is obvious, and power consumption is few.

The drawings and Examples explanation:

Fig. 1 is the utility model line map.

Fig. 2 is the utility model structure chart.

The bridge rectifier loop is made up of D2, D3, D4, D5, D6, the primary coil L1 of transformer B, secondary coil L2.R1, D1, R2, C2 and bidirectional triode thyristor SCR1 form bidirectional triode thyristor delay switch loop, primary coil L1 two ends and the power supply of transformer B join, and connect above-mentioned bidirectional triode thyristor delay switch loop between the common point A of D2, D3 in the end of the first coil L1 of transformer and transformer time coil L2 and the rectifier bridge loop.Rectifier bridge is fixed on the coil JC, makes the coil of rectifier bridge that DC operation is provided.The startup loop of coil direct current is provided, start: press QA, electric current by (1) point → SCR1 → D2 → JC to coil power supply, to D7 behind the C point to (2) end or via (2) point → D6 → JC → D3 → SCR1 → (1) end operation, starting state bidirectional triode thyristor delay switch loop after delaying time disconnects, and starts the loop and disconnects.Bidirectional triode thyristor delay switch loop replaces mechanical contact and rectifier bridge loop and transformer B to start the operating loop of return line direct current for coil JC provides direct current together.

Rectifier bridge loop and bidirectional triode thyristor timing circuit all make circuit board (3) be contained in the shell and transformer B, coil JC together.Contact (1) joins by QA and power supply, and contact (2) joins by TA and power supply.

Claims (1)

1, the contactless energy-saving coil of A.C. contactor, ac contactor coil JC is fixed in the housing, it is characterized in that above-mentioned ac contactor coil JC is by rectifier bridge loop D ₂, D ₃, D ₄, D ₅, D ₆, D ₇Inferior coil L with transformer B ₂Two ends join the first coil L of transformer ₁Two ends (1), (2) and power supply join, and the wiring of power supply (2) end joins by rectifier bridge loop and JC, and power supply wiring (1) end passes through by SCR ₁, R ₁, R ₂, D ₁, C ₁The bidirectional triode thyristor delay switch loop of forming and the inferior coil L of transformer ₂And D ₂, D ₃Common point A join above-mentioned transformer B and above-mentioned by D ₂, D ₃, D ₄, D ₅, D ₆, D ₇The bridge type return of forming reaches by SCR ₁, D ₁, C ₁, R ₁, R ₂The bidirectional triode thyristor delay switch loop of forming is made circuit board and all is contained in the housing.

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