CN2170602Y - Multifunctional DC speed regulator - Google Patents

Abstract

The utility model provides a multifunctional DC speed regulator, belonging to the technical field of a DC dragging control device. The utility model comprises a positive-negative dual-DC power supply circuit, a control circuit formed by a fixing integrating circuit, a voltage regulator circuit, and a current regulation circuit, a dipulse trigger circuit formed by an ordinary pulse triggering phase shifting chip and a corresponding peripheral circuit, a silicon controlled main circuit, an excess voltage protective circuit, an overload protective circuit, and a fixed length stepping given circuit formed by a timing circuit and an analog switch. The utility model can adapt to bad working environment, having the advantages of high reliability and low cost.

Description

Multifunctional DC speed regulator

The utility model belongs to direct current and drags the control device field.

At present, the small-power controllable silicon direct current speeder that is used for machine industry generally adopts voltage negative feedback, positive current feedback compensation to control the speed regulating control loop of single closed loop, adopting the unijunction transistor circuit is its circuits for triggering, only uses the current cut-off negative feedback as current-limiting protection; Outside the dividing circuit safeguard measure is complete, can not work reliably under the adverse circumstances such as big in variations in temperature, that voltage ripple of power network is big, electric motor starting, braking are frequent, often cause machine tool capability to descend.

The purpose of this utility model is to overcome the deficiency of prior art, the multi-functional direct current speeder that provide a kind of reliability height, be adapted to abominable operational environment, cost is low.

The technical solution of the utility model is: multi-functional direct current speeder, form by power circuit 1, speed-regulating control circuit 3, circuits for triggering 6, controllable silicon main circuit 4, protective circuit; Its special character is that power circuit 1 is positive and negative two dc power supply circuit, and it is made up of the transformer of dual output winding and two identical common full-wave rectifying circuits being connected in its two output winding respectively; Speed-regulating control circuit 3 power supply signals are gone into end and are connected in power circuit 1 and go out end, it by common given integrating circuit 10, go into end be connected in given integrating circuit 10 go out end common voltage regulating circuit 9, go into end be connected in voltage regulator circuit 9 go out end common current regulating circuit 8, be connected in given integrating circuit 10 and go into given potentiometer WR5 and the continuous given K switch 1(common single-phase switch of end between going out to hold with power circuit 1) form; Circuits for triggering 6 are that the dipulse of 180 ° of phase places at interval triggers phase-shift circuit, it is gone into end and is connected in that speed-regulating control circuit 3 goes out end and power circuit 1 goes out end, it by normal pulsed trigger phase shift integrated circuit (IC) chip (available KJ001 or KC01 type) and the corresponding known peripheral circuit of forming by resistance, electric capacity, zero potentiometer WR7, triode, dual output winding transformer thereof, be connected in that power circuit 1 goes out to hold and zero potentiometer WR7 between thermistor RC form; The synchronizing signal of normal pulsed triggering phase shift integrated circuit (IC) chip is taken from the full wave rectified signal of power circuit 1, and its 4 pin links to each other with the end that goes out of power circuit 1 rectifier bridge; Controllable silicon main circuit 4 goes out end and links to each other with motor, goes into end and links to each other with AC power, the single phase bridge type rectifier circu that it is made up of 2 controllable silicons, 2 diodes and be serially connected with its reactor, resistance, sampling potentiometer WR1, WR2, WR3, WR4 that goes out to hold and form; The potentiometer WR1 and the WR4 other end and common given integrating circuit 10 go out end and common voltage regulating circuit 9 and go into end and link to each other, form voltage negative feedback and positive current feedback and compensate and control outer shroud; The potentiometer WR3 other end and common voltage regulating circuit 9 goes out end and conventional, well-known current regulating circuit 8 and goes into end and link to each other, forms in the Current Negative Three-Point Capacitance control and encircles; Two controllable silicons link to each other with circuits for triggering 6 outlet transformers two output windings; Power circuit 1 goes out the under-voltage protecting circuit 7 between end and circuits for triggering 6 transistor bases to protective circuit and the overload protecting circuit 5 that is connected between the controllable silicon main circuit 4 potentiometer WR2 other ends and circuits for triggering 6 transistor bases is formed by being connected in; Under-voltage protecting circuit 7 is made up of 2 base stages link to each other with collector electrode, emitter links to each other mutually triode and corresponding resistor; 1 silicon triode that overload protecting circuit 5 is linked to each other mutually by base stage and collector electrode, 1 germanium triode and corresponding resistor, electric capacity are formed; Also go here and there separately between two protective circuits 5,7 and circuits for triggering 6 transistor bases 1 diode is arranged.Special character of the present utility model is that also the common given integrating circuit 10 of speed-regulating control circuit 3 goes into end and also be connected with fixed length stepping given circuit 2(and be used to control lathe stepping feeding distance), it can be with common timing circuits such as 555 timing circuits by common timing circuit 11(), common simulation K switch 3(can be with common simulation switches such as CD4016), the common single-phase switch of interrupted given K switch 2() and corresponding resistor, potentiometer WR6 form.

Accompanying drawing is the utility model circuit diagram.

Further set forth embodiment of the present utility model below in conjunction with accompanying drawing:

As shown in drawings, this multi-functional direct current speeder is made up of power circuit 1, speed-regulating control circuit 3, circuits for triggering 6, controllable silicon main circuit 4, protective circuit.Power circuit 1 is positive and negative two dc power supply circuit, it by the transformer (T1) of dual output winding and two identical common full-wave rectifying circuits being connected in its two output winding respectively (by bridge rectifier chips W Z1, WZ2, capacitor C 4, C5, two integrated package T815 and T915 form) form; Speed-regulating control circuit 3 power supply signals are gone into end and are connected in power circuit 1 and go out end, it by common given integrating circuit 10, go into end be connected in given integrating circuit 10 go out end common voltage regulating circuit 9, go into end be connected in voltage regulator circuit 9 go out end common current regulating circuit 8, be connected in given integrating circuit 10 and go into given potentiometer WR5 and the continuous given K switch 1(common single-phase switch of end between going out to hold with power circuit 1) form; Circuits for triggering 6 are that the dipulse of 180 ° of phase places at interval triggers phase-shift circuit, it goes into to hold to be connected in, and speed-regulating control circuit 3 goes out end and power circuit 1 goes out end, it triggers phase shift integrated circuit (IC) chip KJ001 and corresponding to resistance (R2 by normal pulsed, R3, R5, R6, R7, R8), electric capacity (C1, C2), zero potentiometer WR7, triode (TR5), the known peripheral circuit that dual output winding transformer (T2) is formed, be connected in power circuit 1 and go out common temperature-sensitive resistance R C composition between end and zero potentiometer WR7, the synchronizing signal of normal pulsed triggering phase shift integrated circuit (IC) chip KJ001 is taken from the full wave rectified signal of power circuit 1, and its 4 pin links to each other with the end that goes out of power circuit 1 rectifier bridge (WZ2); Controllable silicon main circuit 4 goes out end and links to each other with motor (M), go into end and link to each other, the single phase bridge type rectifier circu that it is made up of 2 controllable silicons (D1, D2), 2 diodes (D3, D4) and be serially connected with its reactor (L), resistance (R), sampling potentiometer WR1, WR2, WR3, WR4 that goes out to hold and form with AC power; The potentiometer WR1 and the WR4 other end and common given integrating circuit 10 go out end and common voltage regulating circuit 9 and go into end and link to each other, form voltage negative feedback and positive current feedback and compensate and control outer shroud; The potentiometer WR3 other end and common voltage regulating circuit 9 goes out end and conventional, well-known current regulating circuit 8 and goes into end and link to each other, forms in the Current Negative Three-Point Capacitance control and encircles; Two controllable silicons (D1, D2) link to each other with circuits for triggering 6 outlet transformers (T2) two output windings; Protective circuit by be connected in power circuit 1 go out the under-voltage protecting circuit 7 between end and circuits for triggering 6 triodes (TR5) base stage and be connected in the controllable silicon main circuit 4 potentiometer WR2 other ends and circuits for triggering 6 triodes (TR5) base stage between overload protecting circuit 5 form; Under-voltage protecting circuit 7 is made up of 2 base stages link to each other with collector electrode, emitter links to each other mutually triode (TR3, TR4) and corresponding resistor (R13, R14, R15, R16, R17, R18); 1 silicon triode (TR2) that overload protecting circuit 5 is linked to each other mutually by base stage and collector electrode, 1 germanium triode (TR1) and corresponding resistor (R9, R10, R11, R12), electric capacity (forming C3); Also go here and there separately between two protective circuits 5,7 and circuits for triggering 6 triodes (TR5) base stage 1 diode (D5, D6) is arranged; The common given integrating circuit 10 of speed-regulating control circuit 3 is gone into end and also is connected with fixed length stepping given circuit 2, and it is by common 555 timing circuits 11, common simulation switch chip CD4016(K3), the common single-phase switch of interrupted given K switch 2() and corresponding resistor (R1), potentiometer WR6 form.

During circuits for triggering 6 work, because of pulse-triggered phase shift integrated circuit (IC) chip (KJ001) is held the full wave rectified signal of the synchronizing signal V3 of 4 pin from the WZ2 of power circuit 1 synchronously, so producing one-period at its 2 pin is the sawtooth signal (its amplitude and slope size can change by the adjustment of R2, C2) of 10ms, this signal and the dc control signal V1 that goes out end from control circuit 3 relatively, stack and produce a phase signal, after differential capacitance C2 becomes phase pulse signal, export from 9 pin; Like this, in an AC sine signal period (20ms), to produce two pulse-triggered phase signals, making from the phase pulse signal corresponding with control signal V1 of 9 pin output is the dipulse signal at 180 ° at interval, this signal after triode TR5 amplifies, again through transformer T2 output action in controllable silicon D1, D2.Owing to be connected in series thermistor RC on zero potentiometer WR7, when operating ambient temperature changed, zeroing signal voltage V2 can change automatically thereupon, guarantees that chip output 9 pin phase-shift pulse phase of output signal are constant.

During this multi-functional direct current speeder work, Closing Switch K1, by the given motor speed signal of given potentiometer WR5, this signal acts on alignment circuit through common given integrating circuit 10, the impact when preventing electric motor starting; Adjusting by common voltage regulating circuit 9 and current regulating circuit 8, produce control signal input pulse circuits for triggering 6, through circuits for triggering 6 with this control signal be transformed into one at interval 180 ° and with the Phase Double pulse signal of the corresponding phase place of control signal size, and, flow to motor M thereby produce a voltage swing adjustable DC voltage with acting on the controllable silicon of controllable silicon main circuit 4 after this signal amplification.Because this Voltage Feedback is to voltage regulator circuit 9, therefore, it is controlled by the given motor speed signal through WR5, and when changing the rotational speed setup signal, the direct voltage of controllable silicon main circuit 4 outputs just changes, thereby reaches the purpose that changes motor speed.

When current of electric surpass to allow maximum, the triode TR2 conducting of overload protecting circuit 5, the circuit output low level, make simultaneously triode TR1 also conducting keep the conducting of TR2; The low level signal of circuit output acts on controllable silicon, blocks the silicon controlled trigger impulse, closes the controllable silicon conducting, thereby avoids burning speed regulating device and motor.

When line voltage drops to when allowing minimum value, the triode TR3 of under-voltage protecting circuit 7 ends, and makes triode TR4 conducting and produces a low level signal and remove to block the SCR trigger pulse signal, closes the controllable silicon conducting.When line voltage when allowing minimum value, triode TR3 conducting, triode TR4 ends, circuit is exported a high level signal, open start pulse signal makes device recover operate as normal.

Owing to be provided with fixed length feeding circuit 3, this device is used for machine tool feed device, can realize the fixed length step motion of platen or driving shaft.Every Closing Switch K2 once just gives common timing circuit 11 1 starting signals, and making 11 one times of output of timing circuit is the high level signal of △ t, makes analog switch CD4016(K3 then) to connect, the Vg signal acts on speed-regulating control circuit, and motor is rotated; When timing △ t finishes, timing circuit 11 outputs one low level signal, analog switch (K3) disconnects, and acts on the signal vanishing of speed-regulating control circuit, and motor is shut down; Like this, K switch 2 every closures once, motor just moves the △ t time, machine tool feed device reaches the purpose of fixed length feeding with regard to stepping △ t length (can adjust Vg size realize its size).

By adjusting each potentiometer WR1, WR2, WR3, WR4, WR5, WR6, can change circuit parameter, to adapt to different occasion needs.

The utility model owing to adopt is provided with that given integrating circuit and voltage negative feedback and positive current feedback compensation are controlled to be outer shroud, current feedback control is the double closed loop speed regulation system control system of interior ring, can overcome torque disturbance and motor load change to impact, the advantage of quickening system adjusting time of system so have. Because circuits for triggering adopt that the linearity is good, peripheral cell is few and have the Two-pulse triggering phase-shift circuit of temperature compensation function, thus have the reliability height, can the adaptive temperature changing environment advantage. In addition, owing to also be provided with in the device

Load holding circuit, under-voltage protecting circuit, and fixed length feeding circuit are so also have the advantage that safeguard measure is complete, be adapted to abominable working environment and can be advantageously used in the fixed length feeding control of the equipment such as lathe.

Claims (2)

1, a kind of multi-functional direct current speeder, form by power circuit 1, speed-regulating control circuit 3, circuits for triggering 6, controllable silicon main circuit 4, protective circuit, it is characterized in that power circuit 1 is positive and negative two dc power supply circuit, it is made up of the transformer of dual output winding and two identical common full-wave rectifying circuits being connected in its two output winding respectively; Speed-regulating control circuit 3 power supply signals are gone into end and are connected in power circuit 1 and go out end, it by common given integrating circuit 10, go into end be connected in given integrating circuit 10 go out end common voltage regulating circuit 9, go into end be connected in voltage regulator circuit 9 go out end common current regulating circuit 8, be connected in given integrating circuit 10 and go into given potentiometer WR5 and the continuous given K switch 1 of end between going out to hold with power circuit 1 and form; Circuits for triggering 6 are that the dipulse of 180 ° of phase places at interval triggers phase-shift circuit, it is gone into end and is connected in that speed-regulating control circuit 3 goes out end and power circuit 1 goes out end, it by normal pulsed trigger phase shift integrated circuit (IC) chip and the corresponding known peripheral circuit of forming by resistance, electric capacity, zero potentiometer WR7, triode, dual output winding transformer thereof, be connected in that power circuit 1 goes out to hold and zero potentiometer WR7 between thermistor RC form; The synchronizing signal of normal pulsed triggering phase shift integrated circuit (IC) chip is taken from the full wave rectified signal of power circuit 1, and its 4 pin links to each other with the end that goes out of power circuit 1 rectifier bridge; Controllable silicon main circuit 4 goes out end and links to each other, goes into end with motor and link to each other with AC power, the single phase bridge type rectifier circu that it is made up of 2 controllable silicons, 2 diodes and be serially connected with its reactor, resistance, sampling potentiometer WR1, WR2, WR3, WR4 that goes out to hold and form; The potentiometer WR1 and the WR4 other end and common given integrating circuit 10 go out end and common voltage regulating circuit 9 and go into end and link to each other, form voltage negative feedback and positive current feedback and compensate and control outer shroud; The potentiometer WR3 other end and common voltage regulating circuit 9 goes out end and conventional, well-known current regulating circuit 8 and goes into end and link to each other, forms in the Current Negative Three-Point Capacitance control and encircles; Two controllable silicons link to each other with circuits for triggering 6 outlet transformers two output windings; Power circuit 1 goes out the under-voltage protecting circuit 7 between end and circuits for triggering 6 transistor bases to protective circuit and the overload protecting circuit 5 that is connected between the controllable silicon main circuit 4 potentiometer WR2 other ends and circuits for triggering 6 transistor bases is formed by being connected in; Under-voltage protecting circuit 7 is made up of 2 base stages link to each other with collector electrode, emitter links to each other mutually triode and corresponding resistor; 1 silicon triode that overload protecting circuit 5 is linked to each other mutually by base stage and collector electrode, 1 germanium triode and corresponding resistor, electric capacity are formed; Also go here and there separately between two protective circuits 5,7 and circuits for triggering 6 transistor bases 1 diode is arranged.

2, multi-functional direct current speeder according to claim 1, the common given integrating circuit 10 that it is characterized in that speed-regulating control circuit 3 is gone into end and also is connected with fixed length stepping given circuit 2, and it is made up of common timing circuit 11, common simulation K switch 3, interrupted given K switch 2 and corresponding resistor, potentiometer WR6.

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