CN1039686A - Invertible thyristor speed-regulating device of dc motor - Google Patents

Abstract

Invertible thyristor speed-regulating device of DC motor, by power transformer, controllable silicon master control rectification circuit, trigger impulse control circuit and main components and parts fault monitoring circuit are formed; It is characterized by: the former consequent pole of power transformer B places on the same post line of iron core middle column, its former secondary coil can be put upside down mutually, square can be regulated therebetween, change leakage inductance and distributed capacitance to reach, be provided with a thickness between the former consequent pole and be copper coin about the 1mm back ground connection that links to each other with iron core, make electric screen, the former utmost point of transformer connects power frequency 380 hints and presses do input power supply; Can be used for machine-tool processing equipment metal-planing machine and make reversible speed control usefulness.

Description

Invertible thyristor speed-regulating device of DC motor

Technical field of the present invention is an invertible thyristor speed-regulating device of DC motor.

Present SCR-D system (as domestic common KBK system); its technology application and system principle be more complicated all; the KBK system adopts three phase mains to make the input power supply; every table apparatus components and parts reach thousands of, complex structure, and anti-interference and overcurrent protection difference must adopt fast acting fuse; controllable silicon and fast acting fuse are easy to burn; add the device that original device does not have energy consumption braking and energy consumption absorbs when stopping in emergency, poor stability, gantry of being controlled wound is often jumped car.

Invertible thyristor speed-regulating device of DC motor of the present invention; simple in structure; only need 50 components and parts; adopt 380 volts to make the input power supply; use is through the power transformer of certain leakage inductance of having of particular design and distributed capacitance; anxious dynamic braking device and the main components and parts malfunction monitoring apparatus that stops arranged; this device has anti-interference and function overcurrent protection; the no matter unexpected reclosing of mains switch, or the moment impact of contiguous load is all harmless to this device; when create at control gantry; gantry wound can not jumped car, because malfunction monitoring apparatus is arranged, and easy to maintenance.

Below, present invention will be described in detail with reference to the accompanying.

Fig. 1 is a DC motor invertible thyristor speed-regulating circuit diagram of the present invention, and wherein, the frame of broken lines I is a controllable silicon master control rectification circuit, and the frame of broken lines II is main components and parts fault monitoring circuit, and the frame of broken lines III is the trigger impulse circuit, and Fig. 2 is a control circuit.

Fig. 3 is power transformer B ₁Structure chart.

Fig. 4 is power transformer B ₁Equivalent electric circuit.

Among Fig. 3,1 is secondary level, and 2 are the shielding copper coin, and 3 is the former utmost point, and 4 is unshakable in one's determination.

Among Fig. 1 and Fig. 2,

B ₁, B ₂Be power transformer, DW is a voltage-stabiliser tube,

B ₃Be pulse transformer, BG ₁, BG ₂Be triode,

K is an air circuit, BG ₃Be double base diode,

C is B ₁The secondary centre tap, L is a smoothing reactor,

T ₁～T ₇Be controllable silicon, AN ₁～AN ₇Be push-button switch,

g ₁～g ₇Be the SCR control utmost point, J ₀～J ₈Be relay,

LH ₁～LH ₆Be current transformer or R ₆, R ₈, R ₁₀, R ₁₂, R ₁₄And

Senser.R ₁₆Be potentiometer,

A is an ammeter, R ₁, R ₂, R ₃, R ₄, R ₅, R ₇Be resistance

V is a voltmeter, R ₉, R ₁₁, R ₁₃, R ₁₅, R ₁₇Be resistance

D is a DC motor, R ₁₈～R ₂₅Be resistance,

DL is the DC motor excitation winding, C ₁, C ₂, C ₃Be capacitor,

F is a tachogenerator,

FL is the magnetic field winding of tachogenerator,

D ₁～D ₁₁Be diode

DL ₁～DL ₇Be light-emitting diode,

Z ₁, Z ₂, Z ₃Be rectifier,

Invertible thyristor speed-regulating device of DC motor of the present invention is by anti-interference and supply unit overcurrent protection, and main components and parts fault monitoring circuit, controllable silicon master control rectification circuit and trigger impulse and control circuit four parts are formed.

The supply unit of anti-interference and overcurrent protection:

See shown in Figure 3ly, this device is actually a kind of to have power transformer certain leakage inductance and distributed capacitance and that be provided with electric screen and (sees B among Fig. 1 ₁And B ₂).

The former secondary level of transformer places on the same post line of iron core middle column among Fig. 3, and its position can be put upside down mutually, and the square scalable is to change leakage inductance and distributed capacitance therebetween.Be provided with a thickness between the former secondary level and be copper coin about the 1mm ground connection afterwards that links to each other with iron core, make electric screen, its equivalent circuit is shown in Figure 4.The simple power frequency 380 hint line balls that connect of transformer.

C ' among the figure ₂Between the former secondary level of transformer, and former secondary level is to the distributed capacitance after the ground connection between the iron core and simultaneously, L ' ₂₅Be total leakage inductance of transformer, L ₁Be the simple magnetizing inductance of transformer, this just is not difficult to find out, when having transient overvoltages such as thunderbolt or operation to invade when power end, and will be because of C ' ₂With L ' ₂₅Filter action, and weakened greatly or eliminated, exempt from infringement to guarantee secondary level components and parts.When forming the intrusion of overcurrent or short circuit current if load has various reasons, again can be because of leakage inductance L ' ₂₅The current limliting and the hypotensive effect of leakage reactance and being eliminated.This has just realized anti-interference and purpose overcurrent protection.

Controllable silicon master control rectification circuit:

See among Fig. 1 shown in the frame of broken lines I and (to annotate: J wherein ₀～J ₈Be micro electromagnetic relay, HK ₁～HK ₃Subtract before being respectively, preceding change the back and the limit switch that advances, QK ₁～QK ₃Divide

Do not subtract after being, after change preceding and retreat limit switch.Symbol

Be normally opened contact, Be normally-closed contact).

This circuit is by T ₁, T ₂Anode link to each other T ₃, T ₄Negative electrode be connected to 22 points among the figure after linking to each other.T ₁, T ₃Anode and cathode link to each other T ₂, T ₄Anode and cathode be connected to the ab two ends of the secondary level of transformer after linking to each other respectively; Transformer B ₁Secondary level centre cap is connected to 22 points among the figure after C → ammeter A → DC motor D → smoothing reactor L goes here and there mutually; Voltmeter V and in the two ends of D.

The controllable silicon T that dynamic braking is used ₅, T ₆Anode and cathode link to each other, and with energy consumption resistance R ₂₇Behind the string, be connected to the two ends of D mutually; By J _4-6→ J _6-8With J _0-3And QK ₃And AN ₁Mutually and after be connected to T ₅Control utmost point g ₅And between the anode; By J _5-6→ J _7-8With J _0-4And HK ₃And AN ₁Mutually and after be connected to T ₆Control utmost point g ₆And between the anode; AN wherein ₁, HK ₃, QK ₃The usefulness that work stops in emergency, J _4-6→ J _6-8And J _5-6→ J _7-8The usefulness of low speed switching when doing conversion is to reduce the current of commutation and mechanical shock.

Magnetic field winding DL → ammeter A by motor D _C→ field loss protection relay J ₈→ rectifier Z ₁; Magnetic field winding FL by tachogenerator F is connected to rectifier Z ₂Output Q, H; The output of tachogenerator F is connected to negative feedback input 12 and 13 required in trigger impulse and the control circuit; By current transformer that provides main components and parts fault monitoring to use or senser LH ₁～LH ₆, be connected to T respectively ₁～T ₆Negative electrode, like this, after being connected of above-mentioned electricity and line, promptly form controllable silicon master control rectification circuit.

The principle that motor D can obtain reversible speed control is such, when establishing motor D and need just change, only need utilize pulse output control, and the pulse output signals that established phase place is adjustable is added on T ₁, T ₂Trigger electrode g ₁, g ₂, motor D can obtain positive modulation speed.When motor D need reverse speed governing, only need utilize pulse output control, the pulse output signals that established phase place is adjustable is added on T ₃, T ₄Trigger electrode g ₃, g ₄, then motor D can obtain the speed governing of reversing again.

Main components and parts fault monitoring circuit:

See frame of broken lines II among Fig. 1, it is a resistance R ₂₈→ diode D ₁→ light-emitting diode DL ₁→ 0; Resistance R ₂₉→ diode D ₂→ light-emitting diode DL ₂→ 0; Resistance R ₃₀→ diode D ₃→ light-emitting diode DL ₃→ 0; Resistance R ₃₁→ diode D ₄→ light-emitting diode DL ₄→ 0; Resistance R ₃₂→ diode D ₅→ light-emitting diode DL ₅→ 0; Resistance R ₃₃→ diode D ₆→ light-emitting diode DL ₆→ 0; Be connected to current transformer LH respectively ₁～LH ₆And between 0, make main components and parts fault monitoring part; Resistance R ₃₄→ diode D ₇→ light-emitting diode DL ₇→ 0; Be connected to DC power supply 4,5 two ends, make the usefulness of power supply indication; After being connected of above-mentioned electricity and line, promptly constitute the fault monitoring circuit of main components and parts like this.Therefore, as long as with T ₁～T ₆In running order, will be by current transformer LH ₁～LH ₆The signal of telecommunication is offered light-emitting diode DL respectively ₁～DL ₆Convert optical response signal to and come out, thereby reach main components and parts T ₁～T ₆The fault monitoring effect.

Trigger impulse and control circuit:

It is by rectifier Z ₁(being connected into bridge rectifier by four 2CZ14F) is for the magnetic field power supply of DL; Rectifier Z ₂(being connected into bridge rectifier by four 2CZ12B) is for the magnetic field power supply of tachogenerator FL; Rectifier Z ₃(being connected into bridge rectifier by four 2CZ12B) is through resistance R ₁And 2,5 two power supplys behind the voltage-stabiliser tube DW amplitude limit for trigger impulse; Through resistance R ₂After 3,5 two points, for the power supply of pulse amplifier; Through resistance R ₃After 4,5 two points, for the power supply of control section; By point 2 → R ₄→ 6 → J _2-3→ 7 → J _1-5→ J _4-2→ J _7-5→ R ₅→ potentiometer R ₆→ 11, do to advance given input; By point 7 → J _3-5→ J _5-2→ J _6-5→ R ₇→ potentiometer R ₈→ 11, retreat given input; By point 7 → J _4-3→ J _6-6→ R ₉→ potentiometer R ₁₀→ 11, subtract given input before the work; By point 7 → J _5-3→ J _7-6→ R ₁₁→ potentiometer R ₁₂→ 11, subtract given input behind the work; By point 6 → J _2-4→ 8 → J _1-6→ R ₁₃→ potentiometer R ₁₄→ 11, do the given input of stepping; By point 8 → J _3-6→ R ₁₅→ potentiometer R ₁₆→ 11, do to go on foot to return to decide input; By J _7-7And J _6-7Be connected to respectively between 6-9 and 6 → 10, make low speed and switch to reduce the usefulness of the current of commutation and mechanical impact; By point 12 → R ₁₇→ potentiometer R ₁₈→ J _1-9→ 11, the negative feedback input of doing to advance; By point 13 → R ₂₀→ potentiometer R ₁₉→ J _3-9→ 11, retreat the negative feedback input; Above-mentioned two kinds of inputs are in 11 comprehensive inputs back, that make trigger impulse that superpose, capacitor C ₁Be connected to the usefulness that constitutes time-delay between 11 and 5 with above-mentioned input; Transistor BG ₁Base stage b connect 11, current collection collection C and emitter e be respectively through resistance R ₂₁Meet R ₂₂Be connected between 2,5 transistor BG ₂Base stage b meet BG ₁Collector electrode C, its emitter e and collector electrode C, respectively through resistance R ₂₃With capacitor C ₂Be connected between 2,5 unijunction transistor BG ₃Emitter e meet BG ₂Collector electrode, its first base stage b ₁With the second base stage b ₂Respectively through resistance R ₂₄And R ₂₅Be connected between 2,5, make trigger impulse input and pulse shaping part; By point 2 → R ₂₄→ pulse transformer B ₃→ controllable silicon T ₇Make the pulse amplifier part; After being connected of above-mentioned electricity and line, promptly form the trigger impulse part; By point 4 → HK ₃→ QK ₃→ AN ₁→ AN ₂With J _0-1Back → J in parallel _8-1→ J ₀Form start-up control at → 5; By point 4 → AN ₇→ J _0-2→ J ₈→ 18 → →

→ 15 → AN ₅→ HK ₁→ HK ₂→ J _3-2→ J _4-1→ J _6-3→ J ₁→ 5 points; By the point 14 → → 16 → AN ₄→ QK ₁→ QK ₂→ J _1-2→ J _5-1→ J _7-3→ J ₃→ 5; By point 18 → AN ₃With AN ₆, J _2-2Back → J in parallel ₂→ 5; By point 4 → HK ₁→ J _1-3→ J _3-3→ J _6-4→ J ₄→ 5; By point 4 → QK ₁→ J _1-4→ J _3-4→ J _7-4→ J ₅→ 5; By point 4 → HK ₂→ J _7-2→ J ₆→ 5; By point 4 → QK ₂→ J _6-2→ J ₇→ 5; After being connected of above-mentioned electricity and line trigger impulse and control circuit.

Like this can be according to the needs of reversible speed control, do the pulse input after going to control given input and the comprehensive stack of negative velocity feedback input by control circuit.Then after pulse form to be amplified, (its speed regulation can change R among the figure by the rule of reversible speed control by control circuit again ₆, R ₈, R ₁₀, R ₁₂, R ₁₄, R ₁₆Resistance realize), respectively amplified pulse signal is sent into T ₁～T ₄Trigger electrode, control simultaneously T like clockwork ₅～T ₆Trigger electrode input, thereby realize this device accurately, reliable and stable reversible speed control function.

Invertible thyristor speed-regulating device of DC motor of the present invention, in the governing system of machine-tool and other many processing equipments, can realize stepping, step move back and advance → preceding subtracting → preceding change the back → after subtract → after reciprocating motion function before changing, and reliable and stable interference-free.See Fig. 1

Stepping:

As the automatic air circuit breaker K that closes, there is electricity in system, vows magnetic protective current relay J ₈Work, its normally opened contact J ₈With J _8-1All closed, press system start-up button AN ₂, starting relay J ₀Through putting 4 → HK ₃→ QK ₃→ AN ₁→ AN ₂→ J _8-1Electric and work, make system be in the preparation state, unclamp AN ₂The back is by J ₀Self-holding contact J _0-1Make system keep the preparation state, press step button AN this moment ₄, J ₁Through putting 4 → AN ₇→ J _0-2→ 18 → AN ₄→ AN ₅→ HK ₁→ HK ₂→ J _3-2→ J _4-1→ J _6-3Electric and work, its all normally opened contact closures, normally-closed contact disconnect; The trigger impulse input is by point 2 → R ₄→ J _2-4→ J _1-6→ R ₁₃→ potentiometer R ₁₄→ 11, with the point 12 → R of stepping negative feedback input ₁₇→ potentiometer R ₁₈→ J _1-9→ 11, do the input of stepping trigger impulse after the comprehensive stack, behind pulse formation and pulse amplifier by pulse transformer B ₃Output.Again by J _1-7→ D ₈And J _1-8→ D ₉Supply with T respectively ₁, T ₂Control utmost point g ₁, g ₂Trigger impulse and make T ₁, T ₂Be in the rectification operating state, DC motor D is through C point → ammeter A → smoothing reactor L, controllable silicon T ₁, T ₂And must electricly just change stepping.Unclamp step button AN ₄, J ₁And dead electricity and quit work T ₁, T ₂Control utmost point g ₁, g ₂Also lose trigger impulse and quit work.The running of D also just stops.If the time and by close, the time and unclamp AN ₄, then the running of D also can the time and when startup and stopping, this has just realized the purpose of stepping.

Step moves back:

Press the step and move back button AN ₅, J ₃By point 4 → AN ₇→ J _0-2→ J ₈→ AN ₅→ AN ₄→ QK ₁→ QK ₂→ J _1-2→ J _5-1→ J _7-3→ 5 electric and work.Its all normally opened contact closures, normally-closed contact disconnects.Step is moved back input by 2 → R ₄→ J _2-4→ J _3-6→ R ₁₅→ potentiometer R ₁₆→ 11 move back the point 13 → R of negative feedback input with the step ₂₀→ potentiometer R ₁₉→ 11 comprehensive inputs back, that make trigger impulse that superpose are behind pulse formation and pulse amplifier, by pulse transformer B ₃Output is again by J _3-7→ D ₁₀And J _3-8→ D ₁₁, supply with T respectively ₃, T ₄Control utmost point g ₃, g ₄Trigger impulse, make T ₃, T ₄Be in the rectification operating state, motor D gets electric and antiport step moves back through smoothing reactor L → ammeter A → C, unclamps the step and moves back button AN ₅, promptly cut off T ₃, T ₄The triggering control loop, and D is quit work, if the time and by fashionable and disconnect AN ₅, then motor D also with regard to the time and when running and stopping, this has just realized the purpose that the step moves back.

Advance:

Press forwarding button AN ₃, J ₂Through putting 4 → AN ₇→ J _0-2→ J ₈→ AN ₃Get electric work.Its normally opened contact J _2-1, J _2-2Closure, J ₁Through putting 4 → AN ₇→ J _0-2→ J ₈→ AN ₃→ AN ₅→ HK ₁→ HK ₂→ J _3-2→ J _4-1→ J _6-3Electric and work, the input of advancing is by point 2 → R ₄→ J _2-3→ J _1-5→ J _4-2→ J _7-5→ R ₅→ potentiometer R ₆→ 11, with the point 12 → R of the negative feedback input of advancing ₁₇→ potentiometer R ₁₈→ J _1-9Do the input of trigger impulse after → 11 comprehensive stacks, behind pulse formation and pulse amplifier, by pulse transformer output, again by J _1-7→ D ₈And J _1-8→ D ₉Supply with T respectively ₁, T ₂Control utmost point g ₁, g ₂Trigger impulse, make T ₁, T ₂Be in the rectification operating state, motor D just gets electric and the work of just changing a job by C point → ammeter A → motor D → smoothing reactor L.When unclamping AN ₃After, T ₁, T ₂Also by self-holding contact J own _1-1With J _2-1Electric and work on, D also just remains in operation and advances.Before running advances to conversion, subtract switch HK before must rushing open ₁, this moment J ₁Outage, its all normally opened contacts disconnect, and normally-closed contact is closed again, J ₄Through putting 4 → HK ₁→ J _1-3→ J _3-3→ J _6-4Electric and work its all normally opened contact closures, normally-closed contact J _4-4, J _4-5Disconnect, thereby disconnect T ₁, T ₂The control utmost point triggers the loop, makes g ₁, g ₂Lose trigger impulse and quit work, utilize the energy storage of D simultaneously, through J _4-6→ J _6-8Supply with T ₅The trigger impulse of the control utmost point, and by T ₅With R ₂₇The dynamic braking that constitutes absorbs the energy storage of motor D, to reach the purpose of fast braking, simultaneously, by point 7 → J _4-3→ J _6-6→ R ₉→ potentiometer R ₁₀→ 11 supply with the input of advancing, behind pulse formation and pulse amplifier, by pulse transformer B ₃Output is again by J _4-4→ D ₈And J _4-5→ D ₉, supply with T respectively ₁, T ₂Control utmost point g ₁, g ₂Trigger impulse, make T ₁, T ₂Be in rectification state work once more, motor is in low-speed forward, switch HK after low-speed forward is changed before rush open ₂The time, with J ₁Continue to disconnect, its normally opened contact also continues to disconnect, the normally-closed contact closure.J ₆By point 4 → HK ₂→ J _7-2Electric and work, its all normally opened contact closures, normally-closed contact disconnects, therefore, by T ₅With R ₂₇The dynamic braking loop of forming is by J _6-8→ J _4-6Disconnect, make T ₅Quit work.This moment J ₃By point 4 → AN ₇→ J _0-2→ J ₈→ J _2-1→ J _6-1→ AN ₄→ QK ₁→ QK ₂→ J _1-2→ J _5-1→ J _7-3Electric and work, its all normally opened contact closures, normally-closed contact disconnects.Therefore, this input that retreats in a flash is not by J _3-5→ J _5-2→ J _6-5→ R ₇→ R ₈Provide, but the step is moved back the point 2 → R of input ₄→ J _6-7→ R ₁₅→ R ₁₆Provide, with the point 13 → R that retreats the negative feedback input ₂₀→ R ₁₉→ J _3-9→ 11 comprehensive stack backs retreat the input of pulse, behind pulse formation and pulse amplifier, by pulse transformer B ₃Output is again through J _3-7→ D ₁₀And J _3-8→ D ₁₁, supply with T respectively ₃, T ₄Control utmost point g ₃, g ₄Trigger impulse, make T ₃, T ₄Be in small-signal rectification operating state, motor D gets electric and ease astern through smoothing reactor L → ammeter A → C, when return to hit Hui Qianhuan after switch HK ₂And cut-out J ₆Electric loop, make T ₆Quit work.Also cut off the step simultaneously and move back input, and insert the actual required input that retreats, promptly by point 2 → R ₄→ J _2-3→ J _3-5→ J _5-2→ J _6-5→ R ₇→ R ₈Provide, and that other retreat condition is constant, then D promptly continues to retreat by retreating required speed.Subtract switch HK when retreating into before hitting back ₁The time, can make T ₁Be in the readiness for operation that advances fully.Subtract switch QK if retreat into again after rushing open ₁The time, disconnect J again ₃Electric loop and make J ₃Quit work J ₃, J ₄Also just temporarily stop, D also temporarily shuts down and retreats, at this moment J ₅By point 4 → QK ₁→ J _1-4→ J _3-4→ J _7-4And get electric work, and its all normally opened contact closures, normally-closed contact disconnect, and the energy storage that utilizes D is by J _5-6→ J _7-8Supply with T ₆Control utmost point g ₆Triggering signal, and make T ₆With R ₂₇The dynamic braking of forming makes it very fast deceleration with the energy absorption of D, simultaneously access point 7 → J _5-3→ J _6-6→ R ₉→ R ₁₀Subtract input after → 11, behind pulse formation and pulse amplifier, by pulse transformer output, again by J _5-4→ D ₁₀And J _5-5→ D ₁₁Supply with T respectively ₃, T ₄Control utmost point g ₃, g ₄Trigger impulse, make T ₃, T ₄Be in small-signal rectification operating state, make D can keep ease astern again, change preceding switch QK after hitting when retreating into ₂The time, disconnect T ₃, T ₄The control utmost point trigger the loop, make T ₃, T ₄Quit work, the counter-rotating of D retreats also and just stops.At this moment, J ₇By point 4 → QK ₂→ J _6-2Electric and work, its all normally opened contact closures, normally-closed contact disconnects, the input of advancing this moment is not by the required point 7 → J of reality _1-5→ J _4-2→ J _7-5→ R ₅→ R ₆→ 11 provide, but by point 6 → J _7-7→ R ₁₃→ R ₁₄Stepping input provide, behind pulse formation and pulse amplifier, export by pulse transformer, again by J _1-7→ D ₈And J _1-8→ D ₉, supply with T respectively ₁, T ₂Control utmost point g ₁, g ₂Trigger impulse, make T ₁, T ₂Be in small-signal rectification operating state, D also just is in low speed just to be changeed and is advancing, and changes preceding switch QK when advancing to after hitting back ₂, cut off the stepping input, and insert the actual required input of advancing, by point 7 → J _1-5→ J _4-2→ J _7-5→ R ₅→ R ₆→ 11 provide, and D can just change by the required speed of reality and advance.Go down and so forth, D can realize advancing → preceding subtracting → preceding change the back → after subtract → after reciprocating motion before changing.If press stop button AN ₁Or AN ₇, D can suddenly stop, if press back AN again ₆, then the characteristics of motion of D is the same.(above-mentioned speed governing only need change R ₆, R ₈, R ₁₀, R ₁₂, R ₁₄, R ₁₆Resistance, can realize)

The dc motor invertible thyristor speed-regulating system that designs according to new technical scheme proposed by the invention at present is in the application of 1.5 meters * 4 meters gantry wound beds, with of the same type with capacity System (such as domestic common KBK system) compare, not only volume can reduce more than two times, used components and parts can reduce more than 10 times, and have system principle extremely the letter, be easy to be familiar with acceptance by the people, antijamming capability is strong, stability and reliability is high, mechanical property is better, the working service utmost point just, characteristics that investment and maintenance cost are very low. The good news is that more the phenomenon of often burning controllable silicon, burning fastp-acting fuse has not had, the wound platform is often jumped the phenomenon of car and has also been eliminated. Really belong to the splendid dc motor invertible thyristor speed-regulating system of technical-economic index.

Claims (2)

1, invertible thyristor speed-regulating device of DC motor comprises the input power supply, power transformer, controllable silicon master control rectification circuit and trigger impulse and control circuit; Wherein, controllable silicon master control rectification circuit is by thyristor T ₁, T ₂Anode link to each other controllable silicon T ₃, T ₄Negative electrode be connected to 22 points among Fig. 1, T after linking to each other ₁, T ₃Anode and cathode link to each other, T ₂, T ₄Anode and cathode be connected to transformer B respectively after linking to each other ₁The a of consequent pole, b two ends are connected to 22 points among Fig. 1 after transformer consequent pole centre cap C → ammeter A → DC motor D → smoothing reactor L is in series, voltmeter V and in the two ends of motor D, and transformer B is elementary to connect 380 volts of power supplys; When if motor need just change, only need utilize pulse output control, the pulse output signals that established phase place is adjustable is added on T ₁, T ₂Trigger electrode g ₁, g ₂, then motor D can obtain positive modulation speed, when motor D need reverse speed governing, only need utilize pulse output control, and the pulse output signals that established phase place is adjustable is added on T ₃, T ₄Trigger electrode g ₃, g ₄, then motor D obtains the speed governing of reversing again; It is characterized by:

A, the former consequent pole of power transformer B place on the same post line of iron core middle column, its former secondary coil can be put upside down mutually, square can be regulated therebetween, change leakage inductance and distributed capacitance to reach, be provided with a thickness between the former consequent pole and be copper coin about the 1mm back ground connection that links to each other with iron core, make electric screen, the former utmost point of transformer connects power frequency 380 hints and presses do input power supply; When having transient overvoltages such as thunderbolt or operation to invade when power end, will be by the filter action of distributed capacitance and leakage inductance, and weakened greatly or eliminated, to guarantee that the consequent pole components and parts exempt from infringement, when load has overcurrent or short circuit current to invade, can be eliminated because of the current limliting of leakage inductance and the hypotensive effect of leakage reactance again, play anti-interference and overcurrent protection;

The controllable silicon T that b, dynamic braking are used ₅, T ₆Anode and cathode link to each other, and with energy consumption resistance R ₂₇Behind the string, be connected to the two ends of motor D mutually; By J _4-6→ J _6-8→ J _0-3And QM ₃And AN ₁Mutually and after be connected to T ₅Control utmost point g ₅And between the anode; By J _5-6→ J _7-8With J _0-4And HK ₃And AN ₁Be connected to controllable silicon T after being in parallel ₆Control between the utmost point and the anode 19, wherein AN ₁(AN ₁Be button) HK ₃(HK ₃Be normally-closed contact) QK ₃The usefulness that (QK is a normally opened contact) work stops in emergency, J _4-6→ J _6-8And J _5-6→ J _7-8The usefulness of low speed switching when doing conversion is to reduce the current of commutation and mechanical shock;

C, trigger impulse and control circuit are by rectifier Z ₁(being connected into bridge rectifier by four diodes) is for the magnetic field power supply of magnetic field winding DL; Rectifier Z ₂(being connected into bridge rectifier by four diodes) is for the magnetic field power supply of tachogenerator FL; Rectifier Z ₃(being connected into bridge rectifier by four diodes) is through resistance R ₁And 2,5 two power supplys behind the voltage-stabiliser tube DW amplitude limit for trigger impulse; Through resistance R ₂After 3,5 two points, for the power supply of pulse amplifier; Through resistance R ₃After 4,5 two points, for the power supply of control section; By point 12 → R ₁₇→ potentiometer R ₁₈→ J _1-9→ 11 series connection, the negative feedback input of doing to advance; By point 13 → R ₂₀→ potentiometer R ₁₉→ J _3-9→ 11 series connection retreat the negative feedback input; Above-mentioned two kinds input to 11 comprehensive stacks after, do the input of trigger impulse; Capacitor C ₁Be connected to the usefulness that constitutes time-delay between 11 and 5 with above-mentioned input; Transistor BG ₁Base stage b contact 11, collector electrode C and emitter e are respectively through resistance R ₂₁And R ₂₂Be connected between 2,5; Transistor BG ₂Base stage b meet transistor BG ₁Collector electrode C, its emitter e and collector electrode c meet R respectively ₂₃With capacitor C ₂Be connected between 2,5, singly meet transistor BG ₃Emitter e meet transistor BG ₂Collector electrode, its first base stage b ₁With the second base stage b ₂Respectively through resistance R ₂₄And R ₂₅Be connected between 2,5, make trigger impulse input and pulse shaping part, by point 2 → R ₂₄→ pulse transformer B ₃→ controllable silicon T ₇, make the Pulse Power Magnification part; After being connected of above-mentioned electricity and line, promptly form trigger impulse control.Foregoing circuit is through the needs of reversible speed control, and after doing pulse shaping after going to control given input and the comprehensive stack of negative velocity feedback input by control circuit, amplifying, again by control circuit, (its speed regulation can change R among the figure by the rule of reversible speed control ₆, R ₈, R ₁₀, R ₁₂, R ₁₄, R ₁₆Resistance realize), respectively amplified pulse signal is sent into T ₁～T ₄Trigger electrode, control simultaneously T like clockwork ₅～T ₆Trigger electrode input, thereby realize accurately reliable and stable reversible speed control of the present invention.

2, invertible thyristor speed-regulating device of DC motor according to claim 1 is characterized by main components and parts fault monitoring and partly is following circuit connecting mode: current transformer or senser LH ₁～LH ₆Be connected to T respectively ₁～T ₆Negative electrode; Resistance R ₂₈→ diode D ₁→ light-emitting diode DL ₁→ 0 point; Resistance R ₂₉→ diode D ₂→ light-emitting diode DL ₂→ 0 point, resistance R ₃₀→ diode D ₃→ light-emitting diode DL ₃→ 0 point; Resistance R ₃₁→ diode D ₄→ light-emitting diode DL ₄→ 0 point; Resistance R ₃₂→ diode D ₅→ light-emitting diode DL ₅→ 0 point; Resistance R ₃₃→ diode D ₆→ light-emitting diode DL ₆→ 0 point; Above-mentioned six series arms are connected to current transformer or senser LH respectively ₁～LH ₆And between 0, make main components and parts fault monitoring part; Resistance R ₃₄→ diode D ₇→ light-emitting diode DL ₇→ 0, be connected to DC power supply 4,5 two ends, make the usefulness of power supply indication, after being connected of above-mentioned electricity and line, promptly constitute the fault monitoring circuit of main components and parts like this,

Therefore, as long as T ₁～T ₆In running order, will be by current transformer LH ₁～LH ₆The signal of telecommunication is offered light-emitting diode DL respectively ₁～DL ₆Convert optical response signal to and come out, thereby reach main components and parts T ₁～T ₆The fault monitoring effect.

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