CN2182453Y

CN2182453Y - Energy-saving alternating current contactor unit

Info

Publication number: CN2182453Y
Application number: CN 94202133
Authority: CN
Inventors: 李景松
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-26
Filing date: 1994-01-26
Publication date: 1994-11-09
Anticipated expiration: 2004-01-26

Abstract

The utility model belongs to the technical field of transistor circuit low-voltage electric appliances, and more specifically, the utility model relates to an energy-saving AC contactor unit. The utility model is characterized in that the upper part of an electromagnet is provided with a starting coil, the lower part of the electromagnet is provided with a stopping coil, and the upper part if the starting coil is provided with an armature; a lock hook is fixed by a supporting point and a tension spring; an auxiliary contact is connected in series with D < 1 >, D < 2 > and D < 3 >, the starting coil is respectively connected with terminals S < 1 > and S < 2 >, C < 1 >, the emission plate of BG, the negative terminal of C < 2 > and D < 4 >, and the D < 3 > is connected in parallel with the stopping coil. The utility model has the advantages of no noise, no vibration, no electromagnetic interference, power saving, no temperature rise and high safety.

Description

Energy-saving alternating current contactor unit

The utility model relates to crystal circuitron low-voltage electrical apparatus field, is specially the energy saving ac contactor device.

Present common A.C. contactor is widely used in the control system of electromechanical equipment; starting such as all kinds of machine tools stops; the running of all kinds of electromechanical equipments with stop all to widely apply A.C. contactor; this is because A.C. contactor has and is swift in motion; advantages such as far distance controlled and power controlling are big, A.C. contactor also has zero-pressure and under-voltage protection function in addition, promptly when line voltage suddenly disappears or be reduced to certain numerical value; contactor can cut off electric current automatically, plays a protective role.But there are many shortcomings in widely used common A.C. contactor at present, never is improved in decades.The shortcoming that exists has: 1, as long as equipment one starts, contactor just has electric current to pass through all the time, and this electric current becomes heat exhaustion and falls electricity wasting; 2, because iron-core coil passes to alternating current, although the iron core contact-making surface is provided with the short-circuited conducting sleeve device, magnetic field can not be constant fully, the variation of the reaction force of armature and each attracted position in addition, make and have noise and vibration in the contactor real work, this is unallowed in some precision equipments, also is difficult to overcome; 3, because the existence of vibration makes the contact of contact also vibrate thereupon, this just makes the reliability of contact and the life-span of contact reduce; 4, there is electromagnetic interference on every side, influences other electronic circuit operate as normal; 5, because contactor is an inductive element, and power factor is low, reactive power consumption is big.

The purpose of this utility model be to provide a kind of in steady operation the coil no current pass through the A.C. contactor of noiselessness, friction, no electromagnetic interference, saves energy.

The purpose of this utility model is achieved in that an actuating coil is arranged at the top of electromagnet, and the bottom has one to stop coil, and the top of actuating coil is armature.Lock hook is fixed by fulcrum, extension spring, auxiliary contact and D ₁, R ₂, C ₂The serial connection, actuating coil respectively with terminals S ₁, S ₂, C ₁, the emitter of BG, C ₂Negative pole, D ₄Positive pole join D ₃With stop coils from parallel connection of coils.

Advantage of the present utility model is: noiselessness, friction, no electromagnetic interference, economize on electricity, do not have temperature rise, safe and reliable.

Fig. 1 is the utility model structural principle schematic diagram;

Fig. 2 is the utility model electrical schematic diagram.

1-armature, 2-extension spring, 3-actuating coil, 4-electromagnet, 5-stop coil, 6-main contacts, 7-auxiliary contact, 8-fulcrum, 9-lock hook, RD-fuse, D ₄Voltage-stabiliser tube, C-electric capacity, R-resistance, SCR-controllable silicon, BG-triode, D-diode, S ₁, S ₂, S ₃-terminals, HK-switch, QA-button, D-motor, QA-starting button, TA-stop button.

Below in conjunction with accompanying drawing in detail the utility model most preferred embodiment is described in detail: this circuit is to be in motor not have electric off position.When pressing starting button QA, power supply B, the C phase utmost point are through fuse RD ₂, stop button TA, connect actuating coil (3), and make electromagnet produce magnetic potential, attract magnet to move downward, the main and auxiliary contact that is driven by magnet moves downward simultaneously, connects promptly major-minor closing of contact conducting, motor D entry into service with corresponding fixed contact.The closure of auxilliary contact (7) is connected, and makes power supply C through fuse RD ₂, stop button TA, diode D ₁, resistance R ₂, capacitor C ₂Charging.When armature attracted to lower dead center, its lock hook caught on armature under the effect of fulcrum and extension spring, decontrol starting button (QA) this moment, the actuating coil outage, the electromagnet magnetic potential disappears, then armature does not return yet, and this moment, major-minor contact still kept the state connected, made electric motor normal working.Because the connection of auxilliary contact (7) makes capacitor C ₂Be recharged, because of triode is operated in saturation condition, can not trigger controllable silicon, turn-offed by controllable silicon thereby stop coil, no current passes through.Very little electric current is only arranged by triode this moment, therefore economize on electricity, when pressing stop button, the utility model power supply is all cut off, at this moment, and C ₂Be regarded as power supply, finish quitting work.Triode transfers cut-off state to by saturation condition, and collector potential raises, and triggers controllable silicon and makes its conducting, so C ₂Electric energy to stopping coil discharge, make and stop coil by electric current and make electromagnet attract the lock hook lower end to move right, the lock hook upper end is to left movement, release armature promptly takes off and colludes, because the effect of spring, armature returns, having driven major-minor contact simultaneously returns, cut off the power supply of motor, it is shut down, cut off power supply.Work as C ₂After discharge finished, controllable silicon automatically shut down, and lock hook returns under the effect of extension spring.

Claims

1, a kind of energy saving ac contactor device, it is by fulcrum (8), lock hook (9), auxiliary contact (7), main contacts (6), stops coil (5), electromagnet (4), actuating coil (3), extension spring (2), armature (1), fuse (RD), controllable silicon (SCR), triode (BG), diode (D), voltage-stabiliser tube (D ₄), electric capacity (C), resistance compositions such as (R), it is characterized in that: an actuating coil (3) is arranged at the top of electromagnet (4), the bottom has one to stop coil (5), and the top of actuating coil (3) is that armature (1), lock hook (9) are fixing by fulcrum (8), extension spring (2), auxiliary contact (7) and D ₁, R ₂, C ₂The serial connection, actuating coil respectively with terminals S ₁, S ₂, C ₁, the expelling plate of BG, C ₂Negative pole, D ₄Positive pole join D ₃Coil (5) is in parallel with stopping.