CN87102014A

CN87102014A - Thyristor homophase trigger equipment and homophase triggering method

Info

Publication number: CN87102014A
Application number: CN87102014.9A
Authority: CN
Inventors: 周鹏
Original assignee: HENGYANG CITY SEMICONDUCTOR FACTORY HUNAN PROV
Priority date: 1987-04-11
Filing date: 1987-04-11
Publication date: 1988-10-26
Also published as: CN1016303B

Abstract

The invention provides a kind of thyristor homophase trigger equipment and homophase triggering method.This trigger equipment turns to one with synchronous, power supply, triggering, phase shift, automatic control etc. in design, therefore circuit structure is simple, triggering mode is to trigger A phase controllable silicon according to the A phase waveform, and the B phase waveform triggers B phase controllable silicon, and the C phase waveform triggers C phase silicon controlled homophase trigger theory and carries out.The versatility of circuit is good, can be used for various three-phases and single-phase rectifier, inverter circuit, with the purpose that reaches control, regulates output voltage.This device can be used as the automatic holding device of various three-phases or single-phase electrical appliance.To reach the purpose of protection electrical appliance under situation about breaking down.

Description

The present invention is relevant with the thyristor triggering technique.

Existing thyristor triggering technique all is to adopt the out-phase triggering method to trigger, and basic functions such as circuit is synchronous by rectification haply, vibration, phase shift, automatic control, automatic protection are partly formed.Their typical rectification circuit block diagram as shown in Figure 4.Basic functional principle is: under synchronizing signal control, carry out three tunnel phase shifts vibration, under the effect of automatic or manual, adjust the frequency or the forward position of its pulse signal, behind output or power amplifier, trigger three thyristors respectively, owing to there is the phase shift vibration, so trigger B phase thyristor by A phase current potential often, B phase current potential triggers C phase thyristor, and C phase current potential triggers A phase thyristor.This out-phase trigger structure complexity, the cost height, difficult in maintenance, the harmonic wave composition that electrical network is caused is big, produce in debugging complicated, reliability is restive.

Purpose of the present invention is exactly in order to improve the weak point that existing trigger equipment exists.Provide a kind of simple in structure, reliability is high, automatic performance is good, the convenient simple trigger equipment of control.

Fig. 1 is the circuit block diagram and the circuit theory diagrams of thyristor homophase trigger equipment provided by the present invention.It mainly is made up of three-phase half controlled bridge, three-phase full wave rectifier circuit, detection sampler and phase-shift controller.

Thyristor SCR1, SCR2, SCR3 and diode D1, D2, D3 form major loop half control bridge, but also can form three-phase semiwave bridge and three-phase full-controlled bridge.Diode D1, D2, D3 and diode D4, D5, D6 form three-phase full wave rectifier circuit, the output current of this rectifier is as the operating current of trigger equipment, the waveform of its output voltage is corresponding one by one with the major loop waveform, this voltage had both been made the working power of trigger equipment, do trigger equipment phase shift signal source again, output voltage as major loop is higher, then need add a winding or transformer in addition, to obtain suitable trigger voltage value.

Detecting sampler is made up of diode D7, D8, D9, D10, resistance R 1, R2, R3, R4 and voltage-stabiliser tube CW1, CW2, CW3, CW4.See accompanying drawing 2, it is the OR circuit that is constituted by a diode, as long as a, b, c, d end have a signal input, OR circuit P end just has an output signal, import when a, b, c, d end have two above signals, the output of P is as the criterion with the amplitude of input signal the maximum, and does not have crosstalking between signal, change the numerical value of R1, R2, R3, R4, the output amplitude of scalable P.Because the control of trigger is direct current signal, interference can not appear scurrying mutually in its multichannel control, and the sampling loop that detects sampler is not only limited to four tunnel samplings, and is according to actual conditions, the amount doesn't matter.Therefore, the homophase circuits for triggering have very strong input compatibility.

Phase-shift controller is the controlled amplifying circuit formed of triode BG1 and the emitter output circuit of being made up of BG2 and attached device resistance R 5, R6, diode D11, D12, D13 composition.Controlled amplifying circuit also can be made up of two triodes.Can increase or reduce the attached device of phase-shift controller according to the different requirements of circuit.

Now 1 couple of the present invention makes and further specifying in conjunction with the accompanying drawings:

The negative electrode of D1 and the anode series of SCR1, the negative electrode of D2 and the anode series of SCR2, the negative electrode of D3 and the anode series of SCR3, major loop half control bridge is formed in back in parallel then.The control utmost point of SCR1, SCR2, SCR3 also connects the back and joins with the emitter of BG2, and negative electrode also connects the positive pole of back as circuit output end, and the anode of D1, D2, D3 also connects the negative pole of back as circuit output end.The inferior utmost point of three-phase transformer B is connected on respectively between the anode of the negative electrode of D1, D2, D3 and SCR1, SCR2, SCR3 successively, joins with the anode of D4, D5, D6 respectively successively then.The negative electrode of D4, D5, D6 also connects the back and joins with the collector electrode of BG2.R1, DW1, D7 serial connection, R2, DW2, D8 serial connection, R3, DW3, D9 serial connection, R4, DW4, D10 serial connection, the negative electrode of D7, D8, D9, D10 and connect the back and join then with the base stage of BG1.The utmost point electrode of BG1 and the base stage of BG2 are joined, and are connected to resistance R 5 between its contact 2 and the contact 1.Between emitter that is serially connected with D11, D12, D13, BG2 between the negative pole of the emitter of BG1 and circuit output end and circuit output end negative pole, be connected to resistance R 6.

Triggering phase shift process provided by the present invention directly removes to trigger three controllable silicons by the rectification pulsating dc voltage of the three-phase full wave rectifier circuit that D1, D2, D3, D4, D5, D6 formed by BG2, its triggering mode is not to carry out according to existing traditional out-phase triggering mode, but carries out according to the mode that homophase triggers.Be that the A phase waveform triggers A phase controllable silicon; The B phase waveform triggers B phase controllable silicon; The C phase waveform triggers C phase silicon controlled homophase triggering mode and carries out.By changing the voltage of BG1, just can change the output voltage amplitude of BG2, by the change of amplitude, can realize that just three-phase circuit is that 60 °, single phase circuit are the purpose of 90 ° of phase shifts.

RCR homophase trigger equipment provided by the present invention has automatic adjusting and automatic protection functions.Phase shift in the circuit increases or reduce this current potential owing to be BG1 collector potential control, just can change the output voltage in controllable silicon loop, and is constant when the BG1 emitter voltage, and inserts negative feedback in its base stage, just can finish automatic regulatory function.When in a single day a, b, c, d input in the circuit have certain overload or fault to take place; detect the just exportable overload protection signal of sample circuit; the size of this signal amplitude; directly magnifying state and the shutoff of decision BG1; when the overload signal is enough big; triggering signal is cut off, and controllable silicon is closed at automatic zero crossing, finishes automatic protection.

IGCT homophase flip flop equipment provided by the present invention has following characteristics:

1, the no harmonic wave control of IGCT, as long as import the square wave of a certain amplitude at the input of trigger, make trigger be output as zero, just can be easily at the certain hour cutoff thyristor, remove this square wave, SCR output recovers at once, controls the width of this square wave, just can realize not having the voltage-regulation of harmonic wave.

2, do not have oscillator, the mode that homophase triggers is that the forward position that changes triggering signal reaches the purpose that control triggers, and does not swing device and attached amplification and rectification circuit so pull, and its ambient temperature range generally can be at-55 ℃～90 ℃. Particular design can reach-80 ℃～140 ℃.

3, desirable signal source, because the output signal of IGCT homophase flip flop equipment is directly from full-wave rectifier, as long as it is suitable that transformer is paid the power capacity of polygonal voltage or BG2, its amplitude output signal all is suitable for for various SCR, from 1A～1000A, its design need not change, because the internal resistance in rectification control triggering loop is very little, gate pole for SCR triggers, and can be similar to think desirable signal source.

4, versatility, because the homophase triggering mode is not to be based upon in the vibration phase shift, the circuit that homophase triggers is common to three-phase and single-phase multiple halbgesteuerte Gleichrichterbrueckenschaltung. Just the phase shifting angle of single-phase circuit is slightly big. The circuit theory diagrams of the IGCT homophase flip flop equipment of single-phase circuit are seen Fig. 3. By diode D Forming major loop with IGCT SCR can be single-phase semi-controlling bridge or single-phase half-wave bridge. Or single-phase full wave bridge. The circuit of its detection sampler and phase-shift controller is the same with the IGCT homophase flip flop equipment of three-phase circuit. Because SCR homophase flip flop equipment has the output characteristics in ideal signal source, versatility single-phase, three-phase circuit is arranged, have simple structure and perfect function, and control simple, can design and be packaged into the universal standard D-flip flop that is equivalent to the thick film integrated circuit form, also can be designed to the thin film integrated circuit form.

Thyristor homophase trigger equipment provided by the present invention and the trigger equipment that some is traditional compare, its device count has been lacked about 80%, reliability improves 1 times to 4 numbers of poles, and volume reduces 99%, and can adapt to the immalleable high deterioration environment of general circuits for triggering.It can with various three-phases, single-phase rectifier, inverter circuit associated working; control three-phase, single-phase full wave rectification or control phase shift; reach the purpose that changes output voltage; also can be used as the automatic holding device of various three-phases or single-phase electrical appliance, to reach the purpose of protection electrical appliance under the situation of breaking down.The present invention also can be used for the dynamo governor of various delivery type motor vehicles, reaches the purpose of regulating and controlling generator output.

Claims

1, a kind of thyristor homophase trigger equipment, it is characterized in that this device is made up of following components: one by D ₁Negative electrode and SCR ₁Anode series, D ₂Negative electrode and SCR ₂Anode series, D ₃Negative electrode and SCR ₃Anode series, the major loop half control bridge that back in parallel is then formed, SCR ₁, SCR ₂, SCR ₃The control utmost point and connect the back and BG ₂Emitter join SCR ₁, SCR ₂, SCR ₃Negative electrode and connect the back as the positive pole of circuit output end, D ₁, D ₂, D ₃Anode and connect the back as the negative pole of circuit output end; One by D ₁, D ₂, D ₃And D ₄, D ₅, D ₆That forms both makes the trigger equipment working power, makes the three-phase full wave rectifier circuit in trigger equipment phase shift signal source again, D ₄, D ₅, D ₆Anode be connected on D successively ₁, D ₂, D ₃Negative electrode and SCR ₁, SCR ₂, SCR ₃Anode between, join D with the inferior utmost point of transformer B respectively successively then ₄, D ₅, D ₆Negative electrode and connect the back and BG ₂Collector electrode join; One by R ₁, DW ₁, D ₇Serial connection, R ₂, DW ₂, D ₈Serial connection, R ₃, DW ₃, D ₉Serial connection, R ₄, DW ₄, D ₁₀Four tunnel detection samplers that the input compatibility that composes in series is very strong, D ₇, D ₈, D ₉, D ₁₀Negative electrode and connect the back and BG ₁Base stage join; One by BG ₁Controlled amplifier and BG ₂Emitter follower and be serially connected in BG ₁Emitter and the D between the negative pole of output end ₁₁, D ₁₂, D ₁₃And be connected on resistance R between the contact 1,2 ₅, be connected on BG ₂Resistance R between emitter and the circuit output end positive pole ₆The phase-shift controller of being formed.

2, a kind of thyristor homophase trigger equipment as claimed in claim 1, it is characterized in that by the major loop that diode D and thyristor SCR form can be three-phase half controlled bridge or three-phase semiwave bridge or three-phase full-wave bridge, also can be single-phase semi-controlling bridge or single-phase half-wave bridge or single-phase fully controlled bridge.

3, a kind of thyristor homophase trigger equipment as claimed in claim 1 or 2 is characterized in that the sampling loop of the detection sampler that composed in series by R, DW, D can be less than four road sampling loops, also can be more than four road sampling loops.

4, a kind of thyristor homophase triggering method is characterized in that the rectification pulsating dc voltage of three-phase full wave rectifier circuit passes through BG ₂Directly remove to trigger three controllable silicons, the thyristor triggering mode is to trigger A phase controllable silicon, B phase waveform triggering B phase controllable silicon, C phase waveform triggering C phase silicon controlled homophase triggering method triggering controllable silicon according to the A phase waveform, and its phase shift range three-phase circuit is that 60 degree, single phase circuit are 90 degree.