CN201523334U

CN201523334U - Novel thyristor rectification reversible trigger device

Info

Publication number: CN201523334U
Application number: CN2009202590667U
Authority: CN
Inventors: 袁建江; 张海花; 杨朝晖
Original assignee: HUNAN KEMEIDA ELECTRIC CO Ltd
Priority date: 2009-10-26
Filing date: 2009-10-26
Publication date: 2010-07-07
Anticipated expiration: 2019-10-26

Abstract

The utility model relates to a novel thyristor rectification reversible trigger device, which comprises a synchronous signal acquisition circuit, an integrated phase-shift trigger chip, a phase sequence detection circuit, an overpressure and overcurrent protection circuit, a PID close-loop control circuit, a soft starting circuit, an impulse amplifying circuit and a power supply circuit, wherein the synchronous signal acquisition circuit collects a synchronous signal, and the relation between the synchronous signal acquisition circuit and a main circuit is judged through the phase sequence detection circuit, then the synchronous signal acquisition circuit is connected to the integrated phase-shift trigger chip; a phase-shift control voltage formed by PID close-loop control circuit comprising external presets and feedbacks is connected to the integrated phase-shift trigger chip; trigger impulses generated by the synchronous signal trigger a controllable thyristor after power amplification through the impulse amplifying circuit; the overpressure and overcurrent protection circuit is connected to an integrated phase-shift trigger chip for outputting impulse and protecting the main circuit; the soft starting circuit is connected to the integrated phase-shift trigger chip for controlling the power-up and the reset to achieve the soft starting; and the power supply circuit provides a working power supply for the whole device. The utility model has the advantages of operation reliability and long service life.

Description

Novel thyristor rectifier possibility of reversal trigger equipment

Technical field

The utility model relates to type silicon controlled rectifier control technology field, refers in particular to a kind of novel thyristor rectifier possibility of reversal trigger equipment.

Background technology

At present, known, be used in the trigger equipment of big inductive load electromagnet silicon controlled rectifier control, be to produce sawtooth waveforms or pulse by common circuits for triggering plate, trigger silicon controlled rectifier, allow its output dc voltage, output in the big inductive load by forward and reverse D.C. contactor then, because the frequent break-make of D.C. contactor, produce spark and cause unnecessary interference, influence entire circuit stable operation, and at the medium-term and long-term logical forward and reverse voltge surge of big inductive load electromagnet, reduce load useful life.

Summary of the invention

The purpose of this utility model is improved, is innovated at shortcoming that exists in the background technology and problem, provide a kind of and can send the pulse train that makes its silicon controlled rectifier make active inversion, can feed back to electrical network to big inductive load electromagnet is surplus, eliminate big inductive load electromagnet energy fast, reduce forward and reverse contactor control, eliminate electromagnetic interference, also increase the novel thyristor rectifier possibility of reversal trigger equipment in the useful life of load simultaneously.

The technical solution of the utility model is a kind of trigger equipment that comprises following structure of structure:

Synchronous signal acquisition circuit, integrated phase shift flip chip, circuit of testing the phase sequence, over-voltage over-current protection circuit, PID closed control circuit, soft starting circuit, pulse amplifying circuit, power circuit; Wherein:

Gather synchronizing signal by the synchronous signal acquisition circuit and judge and the main circuit phase relation, be connected to integrated phase shift flip chip by circuit of testing the phase sequence;

Forms phase shift controlling voltage with the PID closed control circuit formed of feedback and be connected to integrated phase shift flip chip by the outside is given, produce trigger impulse triggering controlled thyristor after the circuit power amplification is sent out in pulse big with synchronizing signal thus;

Described over-voltage over-current protection circuit is connected to integrated phase shift flip chip output pulse protection main circuit, and soft starting circuit is connected to integrated phase shift flip chip and controls it and power up and reset and allow its soft start, power circuit working power is provided for whole device.

The beneficial effects of the utility model:

The utility model trigger equipment is by being that core is sent six road pulse trains with high-performance thyristor flip chip TC787AP.Be connected to flip chip after the interference of whole device by synchronous filtering circuit for eliminating synchronizing signal, outside given signal and feedback signal are regulated the controllable phase-shifting voltages of processing formation through PID and are connected to flip chip, synchronizing signal is handed over back generation six road burst signals mutually with phase shift signal, amplifies through the pulse power amplification circuit to be connected to thyristor.Phase sequence detects integrated chip TC783AP reliable Detection and goes out the phase relation of control circuit and main circuit, but provides the work-based logic condition to TC787AP.Main circuit, soft starting circuit when in time protecting fault by over-voltage over-current protection circuit again makes it to power on and realizes soft start when resetting.Can make silicon controlled rectifier be in rectification or inverter mode by changing phase-shifting voltages, the purpose that reach given fast, discharges big inductive load electromagnet energy realizes that entire equipment is reliable, stable operation.

The beneficial effects of the utility model are to have simplified the entire equipment structure, minimizing maintenance of equipment amount, operational reliability, stability and the useful life of having improved equipment.

Description of drawings

Fig. 1 is the system framework figure of this trigger equipment

Fig. 2 is utility model apparatus control system figure

Embodiment

As shown in Figure 1, the utility model comprises: synchronous signal acquisition circuit (1), integrated phase shift flip chip (2), circuit of testing the phase sequence (3), over-voltage over-current protection circuit (4), PID closed control circuit (5), soft starting circuit (6), pulse amplifying circuit (7), power circuit (8);

Wherein:

Gather synchronizing signal by synchronous signal acquisition circuit (1) and judge and the main circuit phase relation, be connected to integrated phase shift flip chip (2) by circuit of testing the phase sequence (3);

Form phase shift controlling voltage with the PID closed control circuit (5) formed of feedback and be connected to integrated phase shift flip chip (2) by the outside is given, after circuit (7) power amplification is sent out in pulse big, trigger controlled thyristor with synchronizing signal generation trigger impulse thus;

Described over-voltage over-current protection circuit (4) is connected to integrated phase shift flip chip (2) output pulse protection main circuit; soft starting circuit (6) is connected to integrated phase shift flip chip (2) and controls it and power up and reset and allow its soft start, and power circuit (8) provides working power for whole device.

As shown in Figure 1, the utility model adopts power synchronization signal 1 to carry out sending into phase shift integrated trigger circuit 2 after the fine-tuning Phase Processing, and sync direction is detected and form carrier lock phase shift point; After 3 pairs of three-phase synchro sources of circuit of testing the phase sequence carry out phase-detection, form logical relation control phase shift Integrated Circuit Working State; PID closed control circuit 5 is formed with feedback by the outside is given, calculates the back through PID and forms control voltage, and 1 phase shift integrated trigger circuit makes the silicon controlled rectifier output voltage stabilization reliable in the control chart; Soft starting circuit 6 assurance devices reach soft start control among the figure when powering on and reset; Power amplification is carried out in the pulse that 7 pairs of these devices of pulse amplifying circuit produce among the figure, so that the reliable high-power thyristor that triggers; Over-voltage over-current protection circuit 4 among the figure, block the output pulse when overvoltage, overload, overcurrent appear in circuit fast, protection main circuit and device, and control power circuit 8 provides whole device chip and pulse power device working power among the figure;

As shown in Figure 2, the utility model sends pulse-triggered silicon controlled rectifier 9 by trigger equipment 11, making the AC rectification by three phase mains 10 inputs is direct current, directly offer big inductive load work of electromagnet, feedback sample 12 provides reliable negative feedback for PID control circuit 5, to stablize rectifier output voltage; When needs quit work to big inductive load electromagnet, trigger equipment sends pulse-triggered silicon controlled rectifier 9 makes it be operated in the active inversion state, the energy of big inductive load electromagnet 13 is turned back to electrical network, eliminate the energy of big inductive load electromagnet 13 fast, need not to give once more big inductive load input direct reverse voltage;

Embodiment described in the utility model only is the description that preferred implementation of the present utility model is carried out; be not that the utility model design and scope are limited; under the prerequisite that does not break away from the utility model design philosophy; engineers and technicians make the technical solution of the utility model in this area various modification and improvement; all should fall into protection range of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.

Claims

1. a novel thyristor rectifier possibility of reversal trigger equipment is characterized in that comprising: synchronous signal acquisition circuit (1), integrated phase shift flip chip (2), circuit of testing the phase sequence (3), over-voltage over-current protection circuit (4), PID closed control circuit (5), soft starting circuit (6), pulse amplifying circuit (7), power circuit (8); Wherein: