CN2398713Y

CN2398713Y - A. C.-D. C. two-purpose D. C. electromagnet controller

Info

Publication number: CN2398713Y
Application number: CN 99242542
Authority: CN
Inventors: 赵年振
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-30
Filing date: 1999-08-30
Publication date: 2000-09-27
Anticipated expiration: 2009-08-30

Abstract

The utility model to an AC/DC double-purpose electromagnet controller, which is suitable for the control of brake electromagnets. The utility model comprises a main circuit, a thyristor trigger circuit, a high-current and low-current time delay switching circuit, wherein, the main circuit comprises an AC input terminal, a DC input terminal, a thyristor, and a bridge rectifier circuit; the thyristor is connected between the cathode of the DC input terminal, and the input terminal of an electromagnet; the control electrode of the thyristor is connected with the output terminal of the trigger circuit. The utility model has the advantages that both DC power supply and AC power supply can be used. The utility model also has the advantages of small size, light weight, low cost, and less power consumption.

Description

AC/DC direct solenoid rail controller

The utility model relates to a kind of AC/DC direct solenoid rail controller, is applicable to the control of braking electromagnet.

Present known direct solenoid rail controller, generally start current-limiting resistance by forceful electric power, light current is kept formations such as the current-limiting resistance and the time relay, when braking electromagnet starts, controller keep current-limiting resistance owing to be excluded by short circuit, electromagnet is transfused to high-tension forceful electric power at this moment, when needing light current to keep after startup is finished, keep current-limiting resistance and sealed in, play metering function, the forceful electric power of input electromagnet is become the light current of low-voltage.The shortcoming of this control device is that volume is big, and power consumption is big, the cost height, and some is only limited to the use DC power supply, and the scope of application is limited, bad adaptability.Known in addition ac brake electromagnet controller all is alternating voltage inputs, and the output of high-low pressure conversion direct current is only limited to the use AC power, and adaptability also is restricted.

Therefore, the purpose of this utility model provides a kind of AC/DC direct solenoid rail controller, and it not only not only can use DC power supply but also can use AC power, and volume is little, and in light weight, cost is low.

The purpose of utility model realizes by following mode.

AC/DC direct solenoid rail controller, comprise main circuit, produce the thyristor gating circuit of pulse direct current triggering signal, thereby the forceful electric power of the pulse direct current triggering signal of control triggering electric circuit control thyristor operating angle size, the light current delayed switching circuit, the formation of main circuit comprises ac input end, direct-flow input end, controllable silicon and the bridge rectifier that is connected with ac input end, the output of rectification circuit is connected with negative pole with the positive pole of direct-flow input end respectively, controllable silicon is connected between the input (also being the negative pole of main circuit output) of direct-flow input end negative pole and electromagnet, another input of the positive pole of direct-flow input end and electromagnet (also is the positive pole of main circuit output, the shared positive pole of the input and output of main circuit) connects, and be connected with delayed switching circuit with circuits for triggering by dropping resistor, the silicon controlled control utmost point is connected with the output of circuits for triggering.

When using AC power, alternating voltage becomes pulsating dc voltage after by the bridge rectifier rectification, is input to electromagnet by controllable silicon then; When using DC power supply, its pulsating dc voltage directly is input to electromagnet by controllable silicon.Braking electromagnet starts and when keeping, pulsating dc voltage provides the pulsating dc voltage synchronous with main circuit voltage by dropping resistor to circuits for triggering and delayed switching circuit, can guarantee that circuits for triggering and delayed switching circuit are to the silicon controlled control performance.In the start-up course, the delayed switching circuit output signal, control triggering electric circuit output makes the big pulse direct current triggering signal of thyristor operating angle, and this signal is input to the SCR control utmost point, makes main circuit start required forceful electric power starting resistor by controllable silicon output electromagnet; After electromagnet starts, the delayed switching circuit output signal, control triggering electric circuit output makes the little pulse direct current triggering signal of thyristor operating angle, this signal be input to the silicon controlled control utmost point, makes main circuit keep voltage by the required light current of controllable silicon output electromagnet.

The AC/DC direct solenoid rail controller that the utility model provides has following advantage: 1. both can use DC power supply, and can use AC power again, adaptability is strong; 2. volume is little, and is in light weight, and cost is low, and power consumption is few, reliable, and Installation and Debugging are convenient; 3. the different power supply of voltage height of different occasions, different electric power systems can be adapted to, the control of DC electromagnet such as the rated voltage difference disc type different, clapper-type can be adapted to stroke length.

Below in conjunction with accompanying drawing the utility model is described in detail.

Accompanying drawing is the circuit theory diagrams of the AC/DC direct solenoid rail controller that provides according to the utility model.

Controller as shown in drawings, comprise main circuit, produce the thyristor gating circuit of pulse direct current triggering signal, thereby forceful electric power, the light current delayed switching circuit of the pulse direct current triggering signal of control triggering electric circuit control thyristor operating angle size, the formation of main circuit comprises ac input end A and B, direct-flow input end C and D, controllable silicon SCR, the bridge rectifier D that is connected with ac input end ₁-D ₄The output of rectification circuit is connected with negative pole D with the anodal C of direct-flow input end respectively, controllable silicon SCR is connected between the input (also being the negative pole E of the output of main circuit) of direct-flow input end negative pole D and electromagnet, the anodal C of direct-flow input end and another input of electromagnet (also are the anodal C of main circuit output, the shared positive pole of the input and output of main circuit) connects, and be connected with delayed switching circuit with circuits for triggering by dropping resistor, the control utmost point of controllable silicon SCR is connected with the output of circuits for triggering.

As shown in drawings, circuits for triggering and delayed switching circuit can adopt following circuit: the formation of circuits for triggering comprises voltage-stabiliser tube CW, unijunction transistor CS, two resistance W ₁And W ₂, a capacitor C ₇, two resistance W ₁And W ₂Series connection back and capacitor C ₇Form self-maintained circuit with unijunction transistor CS, first base stage of unijunction transistor CS is connected with the control utmost point of the controllable silicon SCR of main circuit as the output of circuits for triggering.The formation of delayed switching circuit comprises three terminal regulator IC ₁, photoelectrical coupler U, amplifier IC ₂, a resistance W ₃, a capacitor C ₈, three terminal regulator IC ₁For the coupler U in the delayed switching circuit and delay circuit provide by the power supply after its step-down for the second time, amplifier IC ₂With resistance W ₃And capacitor C ₈Constitute delay circuit, amplifier IC ₂Output be connected two resistance W in the output resistance of coupler U and the circuits for triggering with the input of coupler U ₁And W ₂One of them parallel connection.

The operation principle of circuits for triggering and delayed switching circuit is as follows:

The pulsating dc voltage of main circuit, by obtaining trapezoidal synchronous direct voltage behind dropping resistor step-down, the voltage-stabiliser tube CW slicing, this voltage is by resistance W ₁And W ₂To capacitor C ₇Charging, when the voltage of the emitter of unijunction transistor reaches its peak point voltage, the CS conducting, this moment, the output of CS was exported first interior pulse direct current signal of half-wave, and the controllable silicon SCR conducting is behind the half-wave, the voltage of CS emitter is lower than its valley point voltage, and CS ends, at this moment, the control utmost point no pulse triggering signal of controllable silicon SCR, simultaneously, because the pulsating dc voltage in circuits for triggering and the main circuit is synchronous, the zero passage of the SCR anode zero passage with circuits for triggering constantly is constantly consistent, therefore, SCR ends.After second half-wave occurs, repeat said process.In each half-wave first pulse to go out now big more with the time difference at half-wave zero point be that phase shift is big more, the angle of flow of SCR is more little, the voltage that main circuit is exported is low more, otherwise high more.In the electromagnet start-up course, through IC ₁Voltage after the secondary step-down is by resistance W ₃To capacitor C ₈Charging, IC during beginning ₂Input and the voltage of output be low pressure, the output resistance of photoelectrical coupler is minimum, will with its parallel resistor W ₁Or W ₂Short circuit, the moment that so just makes the single crystals pipe export first pulse shifts to an earlier date, i.e. and phase shift is little, makes the angle of flow of SCR big, and main circuit output electromagnet starts required high pressure forceful electric power, after this along with IC ₂Input terminal voltage increases, and its output end voltage increases, and coupler U exports very big resistance, makes resistance W ₁Or W ₂Again sealed in circuits for triggering, this moment, first pulse of unijunction transistor output lagged behind, i.e. phase shift is big, and the SCR angle of flow is diminished, and main circuit output electromagnet is kept required low pressure light current.

For electromagnet and the required difference control voltage of different stroke that adapts to different rated voltages, two resistance W in the circuits for triggering of being mentioned ₁And W ₂, and the resistance W in the delayed switching circuit ₃, be adjustable resistance.By these adjustable resistances, can regulate starting resistor, keep voltage and start-up time.

As shown in drawings, rectification circuit connects capacitor C ₁-C ₄, play anti-High-frequency Interference effect, make controllable silicon not have false triggering phenomenon, capacitor C ₈Parallel resistance R ₉, R ₉Have discharge process, guarantee that delay circuit repeats the performance of work, diode D ₅, resistance R ₁₂And capacitor C ₆Controllable silicon is shielded resistance R ₈And R ₁₀Be used to set the reference voltage of amplifier.

As shown in drawings, electric pressure converter K and 2-5 dropping resistor that is in series is set between the anodal C of main circuit direct-flow input end and circuits for triggering and the delayed switching circuit, each resistance connects an access contact of matching with transducer K.Figure is shown with 5 dropping resistor R ₁-R ₅According to difference between supply voltage and this controller required voltage, provide suitable voltage by transducer K and dropping resistor for circuits for triggering and delayed switching circuit, thereby make this controller can adapt to the different power supply of voltage height of different occasions, different electric power systems.As: when transducer K and resistance R ₂Access contact when connecting, resistance R ₁And R ₂All sealed in circuit, all play the step-down effect, and resistance R 3, R4 and R5 are cut, do not play the step-down effect.

Claims

1. AC/DC direct solenoid rail controller, comprise main circuit, produce the thyristor gating circuit of pulse direct current triggering signal, thereby the forceful electric power of the pulse direct current triggering signal of control triggering electric circuit control thyristor operating angle size, the light current delayed switching circuit, it is characterized in that: the formation of main circuit comprises ac input end, direct-flow input end, controllable silicon and the bridge rectifier that is connected with ac input end, the output of rectification circuit is connected with negative pole with the positive pole of direct-flow input end respectively, controllable silicon is connected between the input of direct-flow input end negative pole and electromagnet, the positive pole of direct-flow input end is connected with another input of electromagnet, and be connected with delayed switching circuit with circuits for triggering by dropping resistor, the silicon controlled control utmost point is connected with the output of circuits for triggering.

2. by the described controller of claim 1, it is characterized in that: the formation of circuits for triggering comprises voltage-stabiliser tube, unijunction transistor, two resistance and an electric capacity, self-maintained circuit is formed with electric capacity and unijunction transistor in two resistance series connection backs, and first base stage of unijunction transistor is connected with the silicon controlled control utmost point of main circuit as the output of circuits for triggering; The formation of delayed switching circuit comprises three terminal regulator, photoelectricity coupling device, amplifier, a resistance and an electric capacity, coupler and delay circuit that three terminal regulator switches in the electrical equipment for time-delay provide by the power supply after its step-down for the second time, amplifier and resistance and electric capacity constitute delay circuit, the output of amplifier is connected with an input of coupler, and one of them of two resistance in the output resistance of coupler and the circuits for triggering is in parallel.

3. by the described controller of claim 2, it is characterized in that: two resistance in the circuits for triggering of being mentioned and a resistance in the delayed switching circuit are adjustable resistance.

4. by claim 1,2 or 3 described controllers, it is characterized in that: electric pressure converter and 2-5 dropping resistor that is in series are set between the positive level of main circuit direct-flow input end and circuits for triggering and the delayed switching circuit, and each resistance connects an access contact of matching with transducer.