CN2332060Y - Soundproofing energy-saving A. C. contactor - Google Patents

Abstract

The utility model discloses a soundproofing energy-saving AC contactor with a fast breaking capacity. The utility model comprises a frame, an iron core, an armature, an electromagnetic coil, a limiting resistor R, a contact, a wire connection pile head and a rectifier. The electromagnetic coil is a combination series coil and combines with the limiting resistor R into a retention working loop, wherein, a coil L3 and the limiting resistor R are connected in parallel with an auxiliary normally closed contact; a starting work loop is composed of a series connection of the auxiliary normally closed contact and coils L2, L1; a freewheeling diode is arranged on the coil L1 to achieve the effect of quick start and quick breaking. The utility model has simple structure, high operational reliability and broad range of application, which is used for occasions requiring fast breaking.

Description

The energy-saving silencing A.C. contactor

The utility model belongs to electric switch.

A.C. contactor is used for remote electronic control connection and breaking operation, has decompression, under-voltage protection effect concurrently, and purposes is very wide.Common A.C. contactor mainly is made up of contact, arc-control device, electromagnet mechanism, realizes the closure and the disjunction of contact with the action of button control electromagnet mechanism, and its response time is shorter, but energy consumption is big, the noise height; The energy-saving silencing contactor of DC operation, dc coil adhesive and sticking are adopted in its contact, have received and have eliminated the noise and energy-conservation effect, but the disjunction recovery time of most product technologies is long, reaches hundreds of milliseconds, thereby has reduced functional reliability, influence control precision, limited its range of application.

The purpose of this utility model is to utilize the energy-saving silencing A.C. contactor that provides a kind of quick disjunction to use the mode of local coil afterflow to realize quick disjunction, and don't influence traditional structure.

Energy-saving silencing A.C. contactor of the present utility model, comprise support, iron core, armature, electromagnetism wire ring, current-limiting resistance, contact, wiring pile crown and rectifying device, it is characterized in that said solenoid is the composite type series coil, wherein one is starting, the shared coil of sticking, and another is the sticking interpole coil; Interpole coil and current-limiting resistance series connection, in parallel with normally closed interlock then; Draw the tap that coil sections is arranged on the coil rising to employ, connect fly-wheel diode on this coil.

Of the present utility model simple in structure, its local coil afterflow the time that has reduced from afterflow to actual disjunction is set, obtained the effect of rapid release.

Embodiment and description of drawings are as follows:

Fig. 1 is the expansion circuit theory diagrams of A.C. contactor.

Fig. 2 is the outline drawing of A.C. contactor.

Referring to accompanying drawing.Shown in Figure 1, this circuit theory legend is the power supply of 380V three-phase alternating current, is connected to control contact CJ between motor D and knife switch DK, and the interlock of CJ contact comprises three normally open contacts and a normally closed interlock.Pick out the control power supply lead wire from any two phase lines, mid-span has stop button TA and starting button QA, again by VD _1-4Make bridge path rectification, its output termination solenoid load.Solenoid is by L ₁, L ₂, L ₃Three sections series connection, a series connection current-limiting resistance R (also being economy resistance) in the path; Normally closed interlock and R, L ₃Parallel connection forms direct path, makes L ₁+ L ₂Become the solenoid that starts to work.Starting back normally closed interlock disconnects L when entering the sticking operating state ₃Be automatically connected into, promptly by L ₁+ L ₂+ L ₃Form the sticking actuating coil, constitute the work loop, holding current is reduced compared with streaming current with current-limiting resistance R; Again at L ₁Two ends connect a fly-wheel diode VD ₅, the afterflow path of formation local coil, when normally-closed contact disconnected, electric current discharged by fly-wheel diode, caused L ₂, L ₃The induction effect of coil makes holding current reduce to realize quick disjunction, and constant L/R continued to discharge in the loop between branch was had no progeny on time.Because the release current requirement is bigger during beginning, L ₁Resistance by the less suitable value of principle.

Rated current is the energy-saving silencing A.C. contactor of 250A, gets L ₁Be 140 circles, φ 0.27; L ₂Be 1950 circle φ 0.27; L ₃Be 2000 circles, φ 0.16, and R is 10K, actual measurement response break-time≤50 millisecond.

Figure 2 shows that the outline drawing of energy-saving silencing contactor, be close with common A.C. contactor profile.Fig. 2-I is the profile of CJ10 Series AC Contactor.Fig. 2-II is the profile of CJ Series AC Contactor.

Claims (1)

1, the energy-saving silencing A.C. contactor used of a kind of quick disjunction, comprise support, iron core, armature, solenoid, current-limiting resistance R, contact CJ, wiring pile crown and rectifying device, it is characterized in that said solenoid is the composite type series coil, wherein one is starting, the shared coil of sticking, and another is sticking interpole coil L ₃Interpole coil L ₃With current-limiting resistance R series connection, in parallel with normally closed interlock then, employ coil (L rising ₁+ L ₂) on draw some coil L ₁Tap, this coil L ₁Last connection fly-wheel diode VD ₅

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