CN202363886U

CN202363886U - Three-section type IGBT (Insulated Gate Bipolar Translator) temperature alarm and control protecting circuit

Info

Publication number: CN202363886U
Application number: CN2011204668305U
Authority: CN
Inventors: 谭国俊; 何凤有; 李渊; 范长海
Original assignee: China Mining Drives and Automation Co Ltd
Current assignee: China Mining Drives and Automation Co Ltd
Priority date: 2011-11-22
Filing date: 2011-11-22
Publication date: 2012-08-01
Anticipated expiration: 2021-11-22

Abstract

The utility model discloses a three-section type IGBT (Insulated Gate Bipolar Translator) temperature alarm and control protecting circuit and belongs to the technical field of electronic control. The three-section type IGBT temperature alarm and control protecting circuit comprises a first path of temperature given circuit, a second path of temperature given circuit, a third path of temperature given circuit, a temperature detection converting circuit, a first path of temperature comparing circuit, a second path of temperature comparing circuit, a third path of temperature comparing circuit, a first path of temperature alarm and control circuit, a second path of temperature alarm and control circuit, a third path of temperature alarm and control circuit and a power source circuit. The three-section type IGBT temperature alarm and control protecting circuit has the beneficial effect of automatically detecting IGBT temperature and applying sectional alarm and control, simple peripheral circuit, strong anti-jamming capability, good stability, convenience and practicability.

Description

Syllogic IGBT temperature alarming and control protection electric circuit

Technical field

The utility model relates to a kind of temperature alarming and control protection electric circuit, specifically is a kind of syllogic IGBT temperature alarming and control protection electric circuit, belongs to the electron controls technology field.

Background technology

Measurement to temperature parameter is very extensive in commercial production, scientific research.Being in the converter device of power device with IGBT, is one of essential condition of decision current transformer operate as normal as the temperature of the IGBT of switching device.The long-pending heat that the size of circulation power device IGBT electric current, the switching frequency of device and shutoff overvoltage all cause IGBT easily; Its temperature has directly influenced the through-current capability as the IGBT of switching device; In case the temperature during IGBT work surpasses the set upper limit value; Must carry out derate to IGBT and use, work long hours that the as easy as rolling off a log IGBT of causing damages under hot environment, cause the current transformer can't operate as normal.

Traditional temperature detecting method fado passes through instrument manual measurement temperature value, or measures the power device output resistance through inquiry curve acquisition temperature, can not carry out the segmented measurement to temperature automatically and report to the police and control, can't satisfy current transformer and control needs automatically.

Summary of the invention

To the problem that above-mentioned prior art exists, the utility model provides a kind of syllogic IGBT temperature alarming and control protection electric circuit, can address the above problem effectively.

To achieve these goals; The technical scheme that the utility model adopts is: a kind of syllogic IGBT temperature alarming and control protection electric circuit; Comprise first via temperature given circuit, the second tunnel temperature given circuit, Third Road temperature given circuit, temperature detection conversion circuit, first via temperature comparison circuit, the second road temperature comparison circuit, Third Road temperature comparison circuit, first via temperature alarming and control circuit, the second road temperature alarming and control circuit, Third Road temperature alarming and control circuit and power circuit; Power circuit is connected with first via temperature given circuit, the second tunnel temperature given circuit, Third Road temperature given circuit, temperature detection conversion circuit, first via temperature comparison circuit, the second road temperature comparison circuit, Third Road temperature comparison circuit, first via temperature alarming and control circuit, the second road temperature alarming and control circuit, Third Road temperature alarming and control circuit respectively, and first via temperature given circuit is connected with first via temperature comparison circuit, first via temperature alarming and control circuit successively; The second tunnel temperature given circuit is connected with the second road temperature comparison circuit, the second road temperature alarming and control circuit successively; Third Road temperature given circuit is connected with Third Road temperature comparison circuit, Third Road temperature alarming and control circuit successively, and the temperature detection conversion circuit is connected with first via temperature comparison circuit, the second road temperature comparison circuit and Third Road temperature comparison circuit respectively.

Further; Power circuit is made up of a Voltage stabilizing module V1 and capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4; Capacitor C 1 is connected with pin 2 with the pin 1 of Voltage stabilizing module V1 respectively with capacitor C 2 two ends; Capacitor C 3 is connected with pin 2 with the pin 1 of Voltage stabilizing module V1 respectively with capacitor C 4, the pin 3 output voltage V CC of Voltage stabilizing module V1.

Further, first via temperature given circuit is by the adjustable shunting a reference source of three ends D1A, adjustable potentiometer W1; Resistance R 1, R2, R3, R4, R5, capacitor C 5, C6, C7 form, and capacitor C 7 links to each other with voltage VCC; Voltage VCC links to each other with resistance R 3 through resistance R 4, and resistance R 3 is connected with the pin 2 of adjustable potentiometer W1, and resistance R 5 is connected with the pin 1 of adjustable potentiometer W1; The pin 3 of adjustable potentiometer W1 links to each other with the pin 8 of the adjustable shunting a reference source of three ends D1A; Capacitor C 6 two ends link to each other with pin 6 with the pin 1 of adjustable shunting a reference source D1A respectively, and resistance R 1 links to each other with resistance R 2, and capacitor C 5 is connected in parallel on resistance R 2 two ends.

Further, the second tunnel temperature given circuit is by the adjustable shunting a reference source of three ends D1B, adjustable potentiometer W2; Resistance R 6, R7, R8, capacitor C 8, C9 form, and capacitor C 9 links to each other with voltage VCC; Resistance R 7 is connected with the pin 2 of adjustable potentiometer W2; Resistance R 6 is connected with the pin 1 of adjustable potentiometer W2, and the pin 3 of adjustable potentiometer W2 links to each other with the pin 8 of the adjustable shunting a reference source of three ends D1B, and capacitor C 8 two ends link to each other with pin 6 with the pin 1 of adjustable shunting a reference source D1B respectively.

Further, Third Road temperature given circuit is by the adjustable shunting a reference source of three ends D1C, adjustable potentiometer W3; Resistance R 9, R10, R11, R12, capacitor C 10, C11 form, and capacitor C 11 links to each other with voltage VCC; Voltage VCC links to each other with resistance R 10 through resistance R 11; Resistance R 10 is connected with the pin 2 of adjustable potentiometer W3, and resistance R 9 is connected with the pin 1 of adjustable potentiometer W3, and the pin 3 of adjustable potentiometer W3 links to each other with the pin 8 of the adjustable shunting a reference source of three ends D1C; Capacitor C 10 two ends link to each other with pin 6 with the pin 1 of adjustable shunting a reference source D1C respectively, and LED display lamp L0 links to each other with resistance R 12.

Further, the temperature detection conversion circuit is by integrated drive chips U1A, resistance R 13, R14; Capacitor C T1, thermistor RT1 forms, and resistance R 14 is connected with the pin 3 of integrated drive chips U1A; The pin 4 of integrated drive chips U1A is connected with voltage VCC, and resistance R 13 two ends are connected with resistance R 14 with voltage VCC respectively, and thermistor RT1 one end is connected with resistance R 13; Other end ground connection; Capacitor C T1 is connected in parallel on thermistor RT1 two ends, and the pin 2 of integrated drive chips U1A is connected with the pin 1 of integrated drive chips U1A, the pin 1 output signal Vout of integrated drive chips U1A.

Further; First via temperature comparison circuit is by resistance R 15, R16, R17; Integrated drive chips U1B; Diode D1 forms, and the given signal VREF1 of first via temperature is connected with the pin 5 of integrated drive chips U1B through resistance R 15, and the pin 5 of integrated drive chips U1B is connected through the pin 7 of resistance R 17 and integrated drive chips U1B; Temperature detection conversion circuit output signal Vout is connected with the pin 6 of integrated drive chips U1B through resistance R 16, and the pin 7 of integrated drive chips U1B is through diode D1 output signal OUT1.

Further; The second road temperature comparison circuit is by resistance R 18, R19, R20; Integrated drive chips U1C; Diode D2 forms, and the given signal VREF2 of the second tunnel temperature is connected with the pin 10 of integrated drive chips U1C through resistance R 18, and the pin 10 of integrated drive chips U1C is connected through the pin 8 of resistance R 20 and integrated drive chips U1C; Temperature detection conversion circuit output signal Vout is connected with the pin 9 of integrated drive chips U1C through resistance R 19, and the pin 8 of integrated drive chips U1C is through diode D2 output signal OUT2.

Further; The Third Road temperature comparison circuit is by resistance R 21, R22, R23; Integrated drive chips U1D; Diode D3 forms, and the given signal VREF3 of Third Road temperature links to each other with the pin 13 of integrated drive chips U1D through resistance R 21, and temperature detection conversion circuit output signal Vout links to each other with the pin 12 of integrated drive chips U1D through resistance R 22; The pin 12 of integrated drive chips U1D links to each other through the pin 14 of resistance R 23 and integrated drive chips U1D, and the pin 14 of integrated drive chips U1D is through diode D3 output signal OUT3.

Further, first via temperature alarming and control circuit be by Schmidt trigger T1A, T1B, T1C, T1D, resistance R 24, R25, R26, R27, R28; Capacitor C 12, C13, diode D4, relay J 1; Triode BG1, light-emitting diode L1 forms, the base stage that output signal OUT1 passes through Schmidt trigger T1C, Schmidt trigger T1D, resistance R 25 and triode BG1 successively; The collector electrode of triode BG1 is connected with the anode of diode D4 and the pin 1 of relay J 1 respectively, and the pin 16 of the negative electrode of diode D4 and relay J 1 is connected, and the anode of capacitor C 12 is connected with the pin 16 of relay J 1; The grounded emitter of triode BG1, the pin 1 of Schmidt trigger T1A is connected with the pin 11 of Schmidt trigger T1D, and Schmidt trigger T1A is connected with Schmidt trigger T1B, resistance R 28 and light-emitting diode L1 successively; Resistance R 26 is connected with the pin 2 of Schmidt trigger T1A; Resistance R 26 is connected with resistance R 27, and resistance R 27 is connected with the pin 3 of Schmidt trigger T1A, and resistance R 27 is connected with capacitor C 13; Capacitor C 13 is connected with the pin 4 of Schmidt trigger T1B, and resistance R 24 is connected with Schmidt trigger T1C.

Further, the second road temperature alarming and control circuit be by Schmidt trigger T2A, T2B, T2C, T2D, resistance R 29, R30, R31, R32, R33; Capacitor C 13, C15, diode D5, relay J 2; Triode BG2, light-emitting diode L2 forms, the base stage that output signal OUT2 passes through Schmidt trigger T2C, Schmidt trigger T2D, resistance R 30 and triode BG2 successively; The collector electrode of triode BG2 is connected with the anode of diode D5 and the pin 1 of relay J 2 respectively, and the pin 16 of the negative electrode of diode D5 and relay J 2 is connected, and the anode of capacitor C 14 is connected with the pin 16 of relay J 2; The grounded emitter of triode BG2, the pin 1 of Schmidt trigger T2A is connected with the pin 11 of Schmidt trigger T2D, and Schmidt trigger T2A is connected with Schmidt trigger T2B, resistance R 33 and light-emitting diode L2 successively; Resistance R 31 is connected with the pin 2 of Schmidt trigger T2A; Resistance R 31 is connected with resistance R 32, and resistance R 32 is connected with the pin 3 of Schmidt trigger T2A, and resistance R 32 is connected with capacitor C 15; Capacitor C 15 is connected with the pin 4 of Schmidt trigger T2B, and resistance R 29 is connected with Schmidt trigger T2C.

Further, the 3rd temperature alarming and control circuit be by Schmidt trigger T3A, T3B, T3C, T3D, resistance R 34, R35, R36, R37, R38; Capacitor C 16, C17, diode D6, relay J 3; Triode BG3, light-emitting diode L3 forms, the base stage that output signal OUT3 passes through Schmidt trigger T3C, Schmidt trigger T3D, resistance R 35 and triode BG3 successively; The collector electrode of triode BG3 is connected with the anode of diode D6 and the pin 1 of relay J 3 respectively, and the pin 16 of the negative electrode of diode D6 and relay J 3 is connected, and the anode of capacitor C 16 is connected with the pin 16 of relay J 3; The grounded emitter of triode BG3, the pin 1 of Schmidt trigger T3A is connected with the pin 11 of Schmidt trigger T3D, and Schmidt trigger T3A is connected with Schmidt trigger T3B, resistance R 38 and light-emitting diode L3 successively; Resistance R 36 is connected with the pin 2 of Schmidt trigger T3A; Resistance R 36 is connected with resistance R 37, and resistance R 37 is connected with the pin 3 of Schmidt trigger T3A, and resistance R 37 is connected with capacitor C 17; Capacitor C 17 is connected with the pin 4 of Schmidt trigger T3B, and resistance R 34 is connected with Schmidt trigger T3C.

The beneficial effect of the utility model is: can detect the IGBT temperature automatically and implement segmentation warning and control, peripheral circuit is simple, and antijamming capability is strong, and good stability is convenient and practical.

Description of drawings

Fig. 1 is the electric theory diagram of the utility model;

Fig. 2 is the temperature given circuit figure of the utility model;

Fig. 3 is the power circuit diagram of the utility model;

Fig. 4 is the temperature detection and the comparison circuit figure of the utility model;

Fig. 5 is first temperature alarming and the control circuit figure of the utility model;

Fig. 6 is second temperature alarming and the control circuit figure of the utility model;

Fig. 7 is the 3rd temperature alarming and the control circuit figure of the utility model.

Among the figure: 1, first via temperature given circuit, 2, the second tunnel temperature given circuit, 3, Third Road temperature given circuit; 4, temperature detection conversion circuit, 5, first via temperature comparison circuit, 6, the second road temperature comparison circuit; 7, Third Road temperature comparison circuit, 8, first via temperature alarming and control circuit, 9, the second road temperature alarming and the control circuit; 10, Third Road temperature alarming and control circuit, 11, power circuit.

Embodiment

To combine accompanying drawing that the utility model is described further below.

Like Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and shown in Figure 7; A kind of syllogic IGBT temperature alarming and control protection electric circuit; Comprise first via temperature given circuit 1, the second tunnel temperature given circuit 2, Third Road temperature given circuit 3, temperature detection conversion circuit 4, first via temperature comparison circuit 5, the second road temperature comparison circuit 6, Third Road temperature comparison circuit 7, first via temperature alarming and control circuit 8, the second road temperature alarming and control circuit 9, Third Road temperature alarming and control circuit 10 and power circuit 11; Power circuit 11 is connected with first via temperature given circuit 1, the second tunnel temperature given circuit 2, Third Road temperature given circuit 3, temperature detection conversion circuit 4, first via temperature comparison circuit 5, the second road temperature comparison circuit 6, Third Road temperature comparison circuit 7, first via temperature alarming and control circuit 8, the second road temperature alarming and control circuit 9, Third Road temperature alarming and control circuit 10 respectively, and first via temperature given circuit 1 is connected with first via temperature comparison circuit 5, first via temperature alarming and control circuit 8 successively; The second tunnel temperature given circuit 2 is connected with the second road temperature comparison circuit 6, the second road temperature alarming and control circuit 9 successively; Third Road temperature given circuit 3 is connected with Third Road temperature comparison circuit 7, Third Road temperature alarming and control circuit 10 successively, and temperature detection conversion circuit 4 is connected with Third Road temperature comparison circuit 7 with first via temperature comparison circuit 5, the second road temperature comparison circuit 6 respectively.

Power circuit 11 is made up of a Voltage stabilizing module V1 and capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4; Capacitor C 1 is connected with pin 2 with the pin 1 of Voltage stabilizing module V1 respectively with capacitor C 2 two ends; Capacitor C 3 is connected with pin 2 with the pin 1 of Voltage stabilizing module V1 respectively with capacitor C 4, the pin 3 output voltage V CC of Voltage stabilizing module V1.

First via temperature given circuit 1 is by the adjustable shunting a reference source of three ends D1A, adjustable potentiometer W1, resistance R 1, R2, R3, R4, R5; Capacitor C 5, C6, C7 form, and capacitor C 7 links to each other with voltage VCC, and voltage VCC links to each other with resistance R 3 through resistance R 4; Resistance R 3 is connected with the pin 2 of adjustable potentiometer W1; Resistance R 5 is connected with the pin 1 of adjustable potentiometer W1, and the pin 3 of adjustable potentiometer W1 links to each other with the pin 8 of the adjustable shunting a reference source of three ends D1A, and capacitor C 6 two ends link to each other with pin 6 with the pin 1 of adjustable shunting a reference source D1A respectively; Resistance R 1 links to each other with resistance R 2, and capacitor C 5 is connected in parallel on resistance R 2 two ends.

The second tunnel temperature given circuit 2 is by the adjustable shunting a reference source of three ends D1B, adjustable potentiometer W2, resistance R 6, R7, R8; Capacitor C 8, C9 form; Capacitor C 9 links to each other with voltage VCC, and resistance R 7 is connected with the pin 2 of adjustable potentiometer W2, and resistance R 6 is connected with the pin 1 of adjustable potentiometer W2; The pin 3 of adjustable potentiometer W2 links to each other with the pin 8 of the adjustable shunting a reference source of three ends D1B, and capacitor C 8 two ends link to each other with pin 6 with the pin 1 of adjustable shunting a reference source D1B respectively.

Third Road temperature given circuit 3 is by the adjustable shunting a reference source of three ends D1C, adjustable potentiometer W3, resistance R 9, R10, R11, R12; Capacitor C 10, C11 form; Capacitor C 11 links to each other with voltage VCC, and voltage VCC links to each other with resistance R 10 through resistance R 11, and resistance R 10 is connected with the pin 2 of adjustable potentiometer W3; Resistance R 9 is connected with the pin 1 of adjustable potentiometer W3; The pin 3 of adjustable potentiometer W3 links to each other with the pin 8 of the adjustable shunting a reference source of three ends D1C, and capacitor C 10 two ends link to each other with pin 6 with the pin 1 of adjustable shunting a reference source D1C respectively, and LED display lamp L0 links to each other with resistance R 12.

Temperature detection conversion circuit 4 is by integrated drive chips U1A, resistance R 13, R14, capacitor C T1; Thermistor RT1 forms, and resistance R 14 is connected with the pin 3 of integrated drive chips U1A, and the pin 4 of integrated drive chips U1A is connected with voltage VCC; Resistance R 13 two ends are connected with resistance R 14 with voltage VCC respectively; Thermistor RT1 one end is connected with resistance R 13, other end ground connection, and capacitor C T1 is connected in parallel on thermistor RT1 two ends; The pin 2 of integrated drive chips U1A is connected with the pin 1 of integrated drive chips U1A, the pin 1 output signal Vout of integrated drive chips U1A.

First via temperature comparison circuit 5 is by resistance R 15, R16, R17; Integrated drive chips U1B; Diode D1 forms; The given signal VREF1 of first via temperature is connected with the pin 5 of integrated drive chips U1B through resistance R 15; The pin 5 of integrated drive chips U1B is connected through the pin 7 of resistance R 17 and integrated drive chips U1B, and temperature detection conversion circuit output signal Vout is connected with the pin 6 of integrated drive chips U1B through resistance R 16, and the pin 7 of integrated drive chips U1B is through diode D1 output signal OUT1.

The second road temperature comparison circuit 6 is by resistance R 18, R19, R20; Integrated drive chips U1C; Diode D2 forms; The given signal VREF2 of the second tunnel temperature is connected with the pin 10 of integrated drive chips U1C through resistance R 18; The pin 10 of integrated drive chips U1C is connected through the pin 8 of resistance R 20 and integrated drive chips U1C, and temperature detection conversion circuit output signal Vout is connected with the pin 9 of integrated drive chips U1C through resistance R 19, and the pin 8 of integrated drive chips U1C is through diode D2 output signal OUT2.

Third Road temperature comparison circuit 7 is by resistance R 21, R22, R23; Integrated drive chips U1D; Diode D3 forms; The given signal VREF3 of Third Road temperature links to each other with the pin 13 of integrated drive chips U1D through resistance R 21; Temperature detection conversion circuit output signal Vout links to each other with the pin 12 of integrated drive chips U1D through resistance R 22, and the pin 12 of integrated drive chips U1D links to each other through the pin 14 of resistance R 23 and integrated drive chips U1D, and the pin 14 of integrated drive chips U1D is through diode D3 output signal OUT3.

First via temperature alarming and control circuit 8 be by Schmidt trigger T1A, T1B, T1C, T1D, resistance R 24, R25, R26, R27, R28, capacitor C 12, C13; Diode D4, relay J 1, triode BG1; Light-emitting diode L1 forms, the base stage that output signal OUT1 passes through Schmidt trigger T1C, Schmidt trigger T1D, resistance R 25 and triode BG1 successively, and the collector electrode of triode BG1 is connected with the anode of diode D4 and the pin 1 of relay J 1 respectively; The pin 16 of the negative electrode of diode D4 and relay J 1 is connected, and the anode of capacitor C 12 is connected the grounded emitter of triode BG1 with the pin 16 of relay J 1; The pin 1 of Schmidt trigger T1A is connected with the pin 11 of Schmidt trigger T1D; Schmidt trigger T1A is connected with Schmidt trigger T1B, resistance R 28 and light-emitting diode L1 successively, and resistance R 26 is connected with the pin 2 of Schmidt trigger T1A, and resistance R 26 is connected with resistance R 27; Resistance R 27 is connected with the pin 3 of Schmidt trigger T1A; Resistance R 27 is connected with capacitor C 13, and capacitor C 13 is connected with the pin 4 of Schmidt trigger T1B, and resistance R 24 is connected with Schmidt trigger T1C.

The second road temperature alarming and control circuit 9 be by Schmidt trigger T2A, T2B, T2C, T2D, resistance R 29, R30, R31, R32, R33, capacitor C 13, C15; Diode D5, relay J 2, triode BG2; Light-emitting diode L2 forms, the base stage that output signal OUT2 passes through Schmidt trigger T2C, Schmidt trigger T2D, resistance R 30 and triode BG2 successively, and the collector electrode of triode BG2 is connected with the anode of diode D5 and the pin 1 of relay J 2 respectively; The pin 16 of the negative electrode of diode D5 and relay J 2 is connected, and the anode of capacitor C 14 is connected the grounded emitter of triode BG2 with the pin 16 of relay J 2; The pin 1 of Schmidt trigger T2A is connected with the pin 11 of Schmidt trigger T2D; Schmidt trigger T2A is connected with Schmidt trigger T2B, resistance R 33 and light-emitting diode L2 successively, and resistance R 31 is connected with the pin 2 of Schmidt trigger T2A, and resistance R 31 is connected with resistance R 32; Resistance R 32 is connected with the pin 3 of Schmidt trigger T2A; Resistance R 32 is connected with capacitor C 15, and capacitor C 15 is connected with the pin 4 of Schmidt trigger T2B, and resistance R 29 is connected with Schmidt trigger T2C.

The 3rd temperature alarming and control circuit 10 be by Schmidt trigger T3A, T3B, T3C, T3D, resistance R 34, R35, R36, R37, R38, capacitor C 16, C17; Diode D6, relay J 3, triode BG3; Light-emitting diode L3 forms, the base stage that output signal OUT3 passes through Schmidt trigger T3C, Schmidt trigger T3D, resistance R 35 and triode BG3 successively, and the collector electrode of triode BG3 is connected with the anode of diode D6 and the pin 1 of relay J 3 respectively; The pin 16 of the negative electrode of diode D6 and relay J 3 is connected, and the anode of capacitor C 16 is connected the grounded emitter of triode BG3 with the pin 16 of relay J 3; The pin 1 of Schmidt trigger T3A is connected with the pin 11 of Schmidt trigger T3D; Schmidt trigger T3A is connected with Schmidt trigger T3B, resistance R 38 and light-emitting diode L3 successively, and resistance R 36 is connected with the pin 2 of Schmidt trigger T3A, and resistance R 36 is connected with resistance R 37; Resistance R 37 is connected with the pin 3 of Schmidt trigger T3A; Resistance R 37 is connected with capacitor C 17, and capacitor C 17 is connected with the pin 4 of Schmidt trigger T3B, and resistance R 34 is connected with Schmidt trigger T3C.

The course of work: the potentiometer W1 that regulates first via temperature given circuit 1 makes it export the reference voltage signal VREF1 of corresponding high-temperature temperature t1; The potentiometer W2 that regulates the second tunnel temperature given circuit 2 makes the reference voltage signal VREF2 of its output corresponding temperature t2 (t1>t2); The potentiometer W1 that regulates Third Road temperature given circuit 3 makes its reference voltage signal VREF3 that exports corresponding cryogenic temperature t3 (t1>t2>t3), will through gather in the temperature detection conversion circuit 4 bury in the IGBT voltage signal Vout that thermistor RT1 generates respectively with VREF1, VREF2, VREF3 through first via temperature comparison circuit 5, the second road temperature comparison circuit 6, Third Road temperature comparison circuit 7 relatively export high temperature signal out1 (IGBT temperature t >=t1), normal temperature signal out2 (and t1>IGBT temperature t >=t2), low-temperature signal out3 (t3 >=IGBT temperature t).When IGBT temperature t >=t1; High temperature signal out1 lights light-emitting diode L1 through first via temperature alarming and control circuit 8 output alarm signals; Make relay J 1 action simultaneously, through auxiliary contact 13-9 (often opening) or 13-11 (normally closed) the output control signal of J1; As t1>during IGBT temperature t >=t2; Normal temperature signal out2 lights light-emitting diode L2 through the second road temperature alarming and control circuit 9 output alarm signals; Make relay J 2 actions simultaneously, through auxiliary contact 13-9 (often opening) or 13-11 (normally closed) the output control signal of J2; When t3 >=IGBT temperature t; Low-temperature signal out3 lights light-emitting diode L3 through Third Road temperature alarming and control circuit 10 output alarm signals; Make relay J 3 actions simultaneously, through auxiliary contact 13-9 (often opening) or 13-11 (normally closed) the output control signal of J3.

Claims

1. syllogic IGBT temperature alarming and control protection electric circuit; It is characterized in that; Comprise first via temperature given circuit (1), the second tunnel temperature given circuit (2), Third Road temperature given circuit (3), temperature detection conversion circuit (4), first via temperature comparison circuit (5), the second road temperature comparison circuit (6), Third Road temperature comparison circuit (7), first via temperature alarming and control circuit (8), the second road temperature alarming and control circuit (9), Third Road temperature alarming and control circuit (10) and power circuit (11); Power circuit (11) is connected with first via temperature given circuit (1), the second tunnel temperature given circuit (2), Third Road temperature given circuit (3), temperature detection conversion circuit (4), first via temperature comparison circuit (5), the second road temperature comparison circuit (6), Third Road temperature comparison circuit (7), first via temperature alarming and control circuit (8), the second road temperature alarming and control circuit (9), Third Road temperature alarming and control circuit (10) respectively, and first via temperature given circuit (1) is connected with first via temperature comparison circuit (5), first via temperature alarming and control circuit (8) successively; The second tunnel temperature given circuit (2) is connected with the second road temperature comparison circuit (6), the second road temperature alarming and control circuit (9) successively; Third Road temperature given circuit (3) is connected with Third Road temperature comparison circuit (7), Third Road temperature alarming and control circuit (10) successively, and temperature detection conversion circuit (4) is connected with first via temperature comparison circuit (5), the second road temperature comparison circuit (6) and Third Road temperature comparison circuit (7) respectively.

2. according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit; It is characterized in that; Described power circuit (11) is made up of a Voltage stabilizing module V1 and capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4; Capacitor C 1 is connected with pin 2 with the pin 1 of Voltage stabilizing module V1 respectively with capacitor C 2 two ends, and capacitor C 3 is connected with pin 2 with the pin 1 of Voltage stabilizing module V1 respectively with capacitor C 4, the pin 3 output voltage V CC of Voltage stabilizing module V1.

3. according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit, it is characterized in that described first via temperature given circuit (1) is by the adjustable shunting a reference source of three ends D1A; Adjustable potentiometer W1, resistance R 1, R2, R3, R4, R5, capacitor C 5, C6, C7 form; Capacitor C 7 links to each other with voltage VCC; Voltage VCC links to each other with resistance R 3 through resistance R 4, and resistance R 3 is connected with the pin 2 of adjustable potentiometer W1, and resistance R 5 is connected with the pin 1 of adjustable potentiometer W1; The pin 3 of adjustable potentiometer W1 links to each other with the pin 8 of the adjustable shunting a reference source of three ends D1A; Capacitor C 6 two ends link to each other with pin 6 with the pin 1 of adjustable shunting a reference source D1A respectively, and resistance R 1 links to each other with resistance R 2, and capacitor C 5 is connected in parallel on resistance R 2 two ends.

4. according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit, it is characterized in that described the second tunnel temperature given circuit (2) is by the adjustable shunting a reference source of three ends D1B; Adjustable potentiometer W2; Resistance R 6, R7, R8, capacitor C 8, C9 form, and capacitor C 9 links to each other with voltage VCC; Resistance R 7 is connected with the pin 2 of adjustable potentiometer W2; Resistance R 6 is connected with the pin 1 of adjustable potentiometer W2, and the pin 3 of adjustable potentiometer W2 links to each other with the pin 8 of the adjustable shunting a reference source of three ends D1B, and capacitor C 8 two ends link to each other with pin 6 with the pin 1 of adjustable shunting a reference source D1B respectively.

5. according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit, it is characterized in that described Third Road temperature given circuit (3) is by the adjustable shunting a reference source of three ends D1C; Adjustable potentiometer W3; Resistance R 9, R10, R11, R12, capacitor C 10, C11 form, and capacitor C 11 links to each other with voltage VCC; Voltage VCC links to each other with resistance R 10 through resistance R 11; Resistance R 10 is connected with the pin 2 of adjustable potentiometer W3, and resistance R 9 is connected with the pin 1 of adjustable potentiometer W3, and the pin 3 of adjustable potentiometer W3 links to each other with the pin 8 of the adjustable shunting a reference source of three ends D1C; Capacitor C 10 two ends link to each other with pin 6 with the pin 1 of adjustable shunting a reference source D1C respectively, and LED display lamp L0 links to each other with resistance R 12.

6. according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit, it is characterized in that described temperature detection conversion circuit (4) is by integrated drive chips U1A; Resistance R 13, R14, capacitor C T1, thermistor RT1 forms; Resistance R 14 is connected with the pin 3 of integrated drive chips U1A; The pin 4 of integrated drive chips U1A is connected with voltage VCC, and resistance R 13 two ends are connected with resistance R 14 with voltage VCC respectively, and thermistor RT1 one end is connected with resistance R 13; Other end ground connection; Capacitor C T1 is connected in parallel on thermistor RT1 two ends, and the pin 2 of integrated drive chips U1A is connected with the pin 1 of integrated drive chips U1A, the pin 1 output signal Vout of integrated drive chips U1A.

7. according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit; It is characterized in that; Described first via temperature comparison circuit (5) is by resistance R 15, R16, R17, integrated drive chips U1B, and diode D1 forms; The given signal VREF1 of first via temperature is connected with the pin 5 of integrated drive chips U1B through resistance R 15; The pin 5 of integrated drive chips U1B is connected through the pin 7 of resistance R 17 and integrated drive chips U1B, and temperature detection conversion circuit output signal Vout is connected with the pin 6 of integrated drive chips U1B through resistance R 16, and the pin 7 of integrated drive chips U1B is through diode D1 output signal OUT1.

8. according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit; It is characterized in that; Described the second road temperature comparison circuit (6) is by resistance R 18, R19, R20, integrated drive chips U1C, and diode D2 forms; The given signal VREF2 of the second tunnel temperature is connected with the pin 10 of integrated drive chips U1C through resistance R 18; The pin 10 of integrated drive chips U1C is connected through the pin 8 of resistance R 20 and integrated drive chips U1C, and temperature detection conversion circuit output signal Vout is connected with the pin 9 of integrated drive chips U1C through resistance R 19, and the pin 8 of integrated drive chips U1C is through diode D2 output signal OUT2.

9. according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit; It is characterized in that; Described Third Road temperature comparison circuit (7) is by resistance R 21, R22, R23, integrated drive chips U1D, and diode D3 forms; The given signal VREF3 of Third Road temperature links to each other with the pin 13 of integrated drive chips U1D through resistance R 21; Temperature detection conversion circuit output signal Vout links to each other with the pin 12 of integrated drive chips U1D through resistance R 22, and the pin 12 of integrated drive chips U1D links to each other through the pin 14 of resistance R 23 and integrated drive chips U1D, and the pin 14 of integrated drive chips U1D is through diode D3 output signal OUT3.

10. according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit, it is characterized in that described first via temperature alarming and control circuit (8) are by Schmidt trigger T1A, T1B, T1C, T1D; Resistance R 24, R25, R26, R27, R28, capacitor C 12, C13, diode D4; Relay J 1, triode BG1, light-emitting diode L1 forms; The base stage that output signal OUT1 passes through Schmidt trigger T1C, Schmidt trigger T1D, resistance R 25 and triode BG1 successively, the collector electrode of triode BG1 is connected with the anode of diode D4 and the pin 1 of relay J 1 respectively, and the pin 16 of the negative electrode of diode D4 and relay J 1 is connected; The anode of capacitor C 12 is connected with the pin 16 of relay J 1; The grounded emitter of triode BG1, the pin 1 of Schmidt trigger T1A is connected with the pin 11 of Schmidt trigger T1D, and Schmidt trigger T1A is connected with Schmidt trigger T1B, resistance R 28 and light-emitting diode L1 successively; Resistance R 26 is connected with the pin 2 of Schmidt trigger T1A; Resistance R 26 is connected with resistance R 27, and resistance R 27 is connected with the pin 3 of Schmidt trigger T1A, and resistance R 27 is connected with capacitor C 13; Capacitor C 13 is connected with the pin 4 of Schmidt trigger T1B, and resistance R 24 is connected with Schmidt trigger T1C.

11., it is characterized in that described the second road temperature alarming and control circuit (9) are by Schmidt trigger T2A, T2B, T2C, T2D according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit; Resistance R 29, R30, R31, R32, R33, capacitor C 13, C15, diode D5; Relay J 2, triode BG2, light-emitting diode L2 forms; The base stage that output signal OUT2 passes through Schmidt trigger T2C, Schmidt trigger T2D, resistance R 30 and triode BG2 successively, the collector electrode of triode BG2 is connected with the anode of diode D5 and the pin 1 of relay J 2 respectively, and the pin 16 of the negative electrode of diode D5 and relay J 2 is connected; The anode of capacitor C 14 is connected with the pin 16 of relay J 2; The grounded emitter of triode BG2, the pin 1 of Schmidt trigger T2A is connected with the pin 11 of Schmidt trigger T2D, and Schmidt trigger T2A is connected with Schmidt trigger T2B, resistance R 33 and light-emitting diode L2 successively; Resistance R 31 is connected with the pin 2 of Schmidt trigger T2A; Resistance R 31 is connected with resistance R 32, and resistance R 32 is connected with the pin 3 of Schmidt trigger T2A, and resistance R 32 is connected with capacitor C 15; Capacitor C 15 is connected with the pin 4 of Schmidt trigger T2B, and resistance R 29 is connected with Schmidt trigger T2C.

12., it is characterized in that described the 3rd temperature alarming and control circuit (10) are by Schmidt trigger T3A, T3B, T3C, T3D according to described a kind of syllogic IGBT temperature alarming of claim 1 and control protection electric circuit; Resistance R 34, R35, R36, R37, R38, capacitor C 16, C17, diode D6; Relay J 3, triode BG3, light-emitting diode L3 forms; The base stage that output signal OUT3 passes through Schmidt trigger T3C, Schmidt trigger T3D, resistance R 35 and triode BG3 successively, the collector electrode of triode BG3 is connected with the anode of diode D6 and the pin 1 of relay J 3 respectively, and the pin 16 of the negative electrode of diode D6 and relay J 3 is connected; The anode of capacitor C 16 is connected with the pin 16 of relay J 3; The grounded emitter of triode BG3, the pin 1 of Schmidt trigger T3A is connected with the pin 11 of Schmidt trigger T3D, and Schmidt trigger T3A is connected with Schmidt trigger T3B, resistance R 38 and light-emitting diode L3 successively; Resistance R 36 is connected with the pin 2 of Schmidt trigger T3A; Resistance R 36 is connected with resistance R 37, and resistance R 37 is connected with the pin 3 of Schmidt trigger T3A, and resistance R 37 is connected with capacitor C 17; Capacitor C 17 is connected with the pin 4 of Schmidt trigger T3B, and resistance R 34 is connected with Schmidt trigger T3C.