CN2062900U - High-efficient energy saving controller for electromagnetic switch - Google Patents

Abstract

The utility model relates to a circuit device providing exciting current for the electromagnetic switches of the alternating current contactor, the magnetic starter, etc. Apart from having a common current starting circuit (1), the circuit device also has a current starting automatic switching and controlling circuit (3) and a current holding circuit (2) which have simple structures. The device changes the running of the alternate-current coil into a direct-current running and can largely save power and reduce the running temperature of the coil, eliminating the alternate-current noise, raising the power factor and reliably and frequently starting the electromagnetic switches.

Description

High-efficient energy saving controller for electromagnetic switch

The utility model relates to a kind ofly provides the circuit arrangement of exciting curent to electromagnetic switch, further is meant a kind of high-efficient energy-saving controller of exciting curent being provided for A.C. contactor and magnetic starter.

Electromagnetic switch such as widely used A.C. contactor and magnetic starter in the industrial production, the general direct use alternating current of its solenoid, copper loss, iron loss and reactive loss etc. are bigger during operation, solenoid burns easily because of the big temperature rise of energy consumption, and AC noise along with increase running time and the armature adhesive bad and become big gradually.In order to cut down the consumption of energy and to eliminate hum, the direct current supply of using instead is also arranged, but generally have the circuit structure complexity again and cost is higher and problem such as unsuitable frequent starting.

The purpose of this utility model, it is the high-efficient energy-saving controller that will provide a kind of solenoid for electromagnetic switch such as A.C. contactor and magnetic starters to use, realize becoming AC coil and be DC operation, economize on electricity significantly and reduce operating temperature, eliminate AC noise, make the simple in structure and frequent starting electromagnetic switch reliably of this device circuit simultaneously.

Referring to the utility model structural principle Fig. 1, this high-efficient energy-saving controller still is divided into the power supply circuits of solenoid J starting current circuit (1) and keeps current circuit (2) two parts, a starting current automatic switching control circuit (3) also is set simultaneously supplies with starting current circuit (1) to trigger control signal, the realization solenoid is enabled under the low-voltage under full voltage works.Feature part of the present utility model is the simple starting current automatic switching control circuit of project organization (3) and keeps current circuit (2).

Below in conjunction with drawings and Examples the utility model is described in detail.

Fig. 1 is the utility model circuit frame principle figure;

Fig. 2 is the utility model physical circuit schematic diagram.

Referring to Fig. 1 and Fig. 2, starting current circuit (1) is made of controllable silicon KG, keeps current circuit (2) by exchanging protector RX ₁, power transformer KB, diode D ₃With D ₄, dc insurance device RX ₂And operating switch K composition, starting current automatic switching control circuit (3) is by diode D ₁, voltage-stabiliser tube D ₂, resistance R and capacitor C ₁With C ₂Form the A.C. contactor that J is connected when being the utility model work or the solenoid of magnetic starter.Behind closed operating switch K, the 220V AC power is added on by C ₁, D ₂And the loop of J composition, pass through C ₁Step-down is at D ₂Direct voltage is set up at two ends, and this voltage passes through D again ₁, C ₂And R is added between the control utmost point and negative electrode of controllable silicon KG, makes the conducting of KG synchronous triggering, so the direct voltage about KG output 100V is given the J two ends.Meanwhile, AC power also by after the KB step-down again via D ₃With D ₄The full-wave rectifying circuit rectification of forming, this rectification circuit and controllable silicon KG supply with J with being in parallel (certain, exciting curent also comprise and flows through C with exciting curent ₁With D ₂Electric current), make electromagnetic switch under total head, start, the D here ₃With D ₄The afterflow usefulness of double as KG simultaneously also can increase the startup gravitation of electromagnetic switch greatly within former specified coil power limited.The triggering Control current of controllable silicon KG when triggering and conducting approximates C ₂Charging current, work as C ₂Charge to voltage and equal D ₂During both end voltage, the control pole tension of KG equals zero, and it turn-offs because of electric current out of hand, and this moment, solenoid J only relied on D ₃With D ₄Rectification low pressure supply with exciting curent, continue to keep the adhesive of electromagnetic switch.When operating switch disconnects, the J decompression, electromagnetic switch disconnects, and R is as C ₂Discharge resistance, in order to next time, KG can conducting when restarting.The primary coil N of transformer KB ₁With secondary coil N ₂Ratio be about 37 times, the various A.C. contactors that the direct voltage that obtains at last is adapted to 60-600A use, also the transformation ratio and the various magnetic starter that can as required transformer KB design be fit to be used.

The utility model and A.C. contactor and magnetic starter isodynamic switch are used in conjunction, and the change Alternating Current Power Supply is direct current supply, has eliminated AC noise, can economize on electricity about 97%, and power factor is brought up to more than 95%. Solenoid is in low pressure operation, and the little temperature rise of electric current is low, is difficult for burning, and has improved service life. This device circuit is simple in structure, reliable working performance, and low cost of manufacture through test, is adapted to the frequent starting of electromagnetic switch 3000 times/hour.

Claims (2)

1, a kind of electromagnetic switch high-efficient energy-saving controller of exciting curent being provided for A.C. contactor and magnetic starter, comprise starting current circuit (1) and keep current circuit (2) two parts power supply circuits and supply with starting current circuit (1) to trigger the starting current automatic switching control circuit (3) of control signal, starting current circuit (1) is made of controllable silicon KG, of the present utility model being characterised in that, starting current automatic switching control circuit (3) is by diode D ₁, voltage-stabiliser tube D ₂, resistance R and capacitor C ₁With C ₂Form.

2, electromagnetic switch high-efficient energy-saving controller as claimed in claim 1 is characterized in that, keeps current circuit (2) by exchanging protector RX ₁, power transformer KB, diode D ₃With D ₄, dc insurance device RX ₂And operating switch K forms.