CN205319683U - Safe torque shutoff functional circuit - Google Patents
Safe torque shutoff functional circuit Download PDFInfo
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- CN205319683U CN205319683U CN201521041489.3U CN201521041489U CN205319683U CN 205319683 U CN205319683 U CN 205319683U CN 201521041489 U CN201521041489 U CN 201521041489U CN 205319683 U CN205319683 U CN 205319683U
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Abstract
The utility model discloses a safe torque shutoff functional circuit, include a STO control channel that constitutes by a EMC circuit, an undervoltage protection circuit, an optical coupling isolation circuit, the 3rd undervoltage protection circuit, IGBT control power supply switch circuit and A third voltage comparison circuit, the 2nd STO control channel that constitutes by the 2nd EMC circuit, the 2nd undervoltage protection circuit, the 2nd optical coupling isolation circuit, fourth undervoltage protection circuit, the 2nd IGBT control power supply switch circuit and fourth voltage comparison circuit, and the feedback circuit that constitutes by a voltage comparison circuit, the 2nd voltage comparison circuit, the 3rd optical coupling isolation circuit and triode switch circuit. The utility model has the advantages that: adopt two independent STO control channels, an arbitrary control channel trouble does not influence the another one passageway and independently carries out its function that prevents to produce the torque when motor from stopping, having defeated entry control voltage undervoltage protection circuit of STO and feedback circuit, circuit component configuration optimization, and the cost is lower.
Description
Technical field
The utility model relates to circuit field, relates in particular to a kind of safe torque turn-off function circuit.
Background technology
In recent years, for preventing motor accidental activation and preventing unexpected generation, people have proposed the related request of functional safety for products such as frequency converter, motor servo drivers (abbreviation driver). Wherein safe torque shutoff (SAFETORQUEOFF, STO) is exactly so a kind of security function. Safe torque turn-off function prevents from producing torque when motor from stopping, and makes machine become a part for security system.
Safe torque turn-off function circuit is widely used in injection machine and lathe system, at present common injection machine and lathe system enable terminal to signal that allows operation and can not move of driver by one, this Enable Pin sub-connection is to external input terminals of driver, the signal that the control chip of internal drive receives by this terminal, decides and allows operation and can not move. This decision is a kind of software instruction, if driver software breaks down, likely provides under the signal that can not move at injection machine system, driver itself is given the operating instruction making mistake, make driver operation, thereby drive motor starting may meet accident in this case.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, the utility model provides a kind of safe torque turn-off function circuit, by two independently STO control channel prevent motor accidental activation, and simple in structure, circuit cost is low.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of safe torque turn-off function circuit, it is characterized in that, comprise the STO control channel being formed by an EMC circuit, the first under-voltage protecting circuit, the first optical coupling isolation circuit, the 3rd under-voltage protecting circuit, an IGBT control power switch circuit and tertiary voltage comparison circuit; The 2nd STO control channel being formed by the 2nd EMC circuit, the second under-voltage protecting circuit, the second optical coupling isolation circuit, the 4th under-voltage protecting circuit, the 2nd IGBT control power switch circuit and the 4th voltage comparator circuit; And the feedback line being formed by the first voltage comparator circuit, second voltage comparison circuit, the 3rd optical coupling isolation circuit and transistor switching circuit;
The output of a described input for EMC circuit and the controller of application apparatus is connected, the output of a described EMC circuit is connected with the input of described the first under-voltage protecting circuit, the output of described the first under-voltage protecting circuit is connected with the input of described the first optical coupling isolation circuit, the output of described the first optical coupling isolation circuit is connected with the input of described the 3rd under-voltage protecting circuit, the output of described the 3rd under-voltage protecting circuit is connected with the control end that a described IGBT controls power switch circuit, the output that a described IGBT controls power switch circuit is connected with the input of described tertiary voltage comparison circuit, the output that a described IGBT controls power switch circuit is connected with the drive plate in motor driver, the output of described tertiary voltage comparison circuit is connected with the mainboard in motor driver,
The output of described the 2nd input of EMC circuit and the controller of application apparatus is connected, the output of described the 2nd EMC circuit is connected with the input of described the second under-voltage protecting circuit, the output of described the second under-voltage protecting circuit is connected with the input of described the second optical coupling isolation circuit, the output of described the second optical coupling isolation circuit is connected with the input of described the 4th under-voltage protecting circuit, the output of described the 4th under-voltage protecting circuit is connected with the control end that described the 2nd IGBT controls power switch circuit, the output that described the 2nd IGBT controls power switch circuit is connected with the input of described the 4th voltage comparator circuit, the output that described the 2nd IGBT controls power switch circuit is connected with the drive plate in motor driver, the output of described the 4th voltage comparator circuit is connected with the mainboard in motor driver,
The input of described the first voltage comparator circuit is connected with the output that a described IGBT controls power switch circuit, the output of described the first voltage comparator circuit is connected with the input of described the 3rd optical coupling isolation circuit, the input of described second voltage comparison circuit is connected with the output that described the 2nd IGBT controls power switch circuit, the output of described second voltage comparison circuit is connected with the input of described the 3rd optical coupling isolation circuit, described the 3rd output of optical coupling isolation circuit and the input of described transistor switching circuit are connected, the output of described transistor switching circuit is connected with the input of the controller of described application apparatus.
A described EMC circuit comprises the first electric capacity, the second electric capacity and a TVS protection device; The cathode output end of the control unit interface of described application apparatus is connected with one end of one end of described the first electric capacity, described TVS protection device and its link is connected with described the first under-voltage protecting circuit; the other end of described the first electric capacity is connected with one end of described the second electric capacity and its link picks shell ground, the cathode output end of the other end, the other end of described TVS protection device and the control unit interface of described application apparatus of described the second electric capacity is connected and its link is connected with described the first under-voltage protecting circuit.
Described the first under-voltage protecting circuit comprises the first resistance, the second resistance, the 3rd electric capacity, the tenth diode and the first Zener diode; One end of described the first resistance is connected with a described EMC circuit, the other end of the first resistance is connected with one end of one end of described the second resistance, described the 3rd electric capacity, the negative pole of described the first Zener diode, the positive pole of described the first Zener diode is connected with the negative pole of described the tenth diode, and the positive pole of described the tenth diode is connected with the other end of the other end of described the second resistance, described the 3rd electric capacity and its link is connected with a described EMC circuit.
Described the first optical coupling isolation circuit comprises the first optocoupler; the positive terminal of described the first optocoupler is connected with described the first under-voltage protecting circuit respectively with end of oppisite phase; the grounded emitter of described the first optocoupler, the colelctor electrode of described the first optocoupler is connected with described the 3rd under-voltage protecting circuit.
Described the 3rd under-voltage protecting circuit comprises the 4th resistance and the 3rd Zener diode; The positive pole of described the 3rd Zener diode is connected with described the first optical coupling isolation circuit, and the negative pole of described the 3rd Zener diode is connected with one end of described the 4th resistance, and the other end of described the 4th resistance is controlled power switch circuit with a described IGBT and is connected.
A described IGBT controls power switch circuit and comprises the 3rd resistance, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity and the first triode, one end of the base stage of described the first triode and described the 3rd resistance, one end of described the 4th electric capacity connects and its link is connected with described the 3rd under-voltage protecting circuit, the other end of the emitter stage of described the first triode and described the 3rd resistance, the other end of described the 4th electric capacity and 5V voltage connect, one end of the colelctor electrode of described the first triode and described the 5th electric capacity, one end of the 6th electric capacity connects and its link and described the first voltage comparator circuit, drive plate in described tertiary voltage comparison circuit and described motor driver connects, the other end of described the 5th electric capacity is connected with the other end of described the 6th electric capacity and its link ground connection.
Described tertiary voltage comparison circuit comprises the 25 resistance, the 26 resistance, the 27 resistance, the 28 resistance, the 21 resistance, the 22 resistance, the 21 electric capacity, the 22 electric capacity, the 19 electric capacity and the 3rd comparator, one end of described the 26 resistance is connected with 5V voltage, the other end of described the 26 resistance, one end of described the 25 resistance, one end of described the 21 electric capacity is connected with the in-phase input end of described the 3rd comparator, the other end of described the 25 resistance, the other end of described the 21 electric capacity connects and its link ground connection, one end of described the 27 resistance is controlled power switch circuit with a described IGBT and is connected, the other end of described the 27 resistance, one end of described the 28 resistance, one end of described the 22 electric capacity is connected with the inverting input of described the 3rd comparator, the other end of described the 28 resistance, the other end of described the 22 electric capacity connects and its link ground connection, the output of described the 3rd comparator is connected with one end of described the 21 resistance, described the 21 other end of resistance and one end of described the 22 resistance, one end of described the 19 electric capacity connects and its link is connected with the mainboard in described motor driver, the other end of described the 22 resistance is connected with 5V voltage, the other end ground connection of described the 19 electric capacity.
Described the first voltage comparator circuit comprises the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 electric capacity, the 14 electric capacity, the 15 electric capacity and the first comparator, one end of described the 9th resistance is connected with 5V voltage, the other end of described the 9th resistance, one end of the 11 resistance, one end of the 13 electric capacity is connected with the in-phase input end of described the first comparator, the other end of described the 11 resistance is connected with the other end of described the 13 electric capacity and its link ground connection, one end of described the tenth resistance is controlled power switch circuit with a described IGBT and is connected, the other end of described the tenth resistance, one end of the 12 resistance, one end of the 15 electric capacity is connected with the inverting input of described the first comparator, the other end of described the 12 resistance is connected with the other end of described the 15 electric capacity and its link ground connection, the power end of described the first comparator is connected with one end of described the 14 electric capacity and 5V voltage, the other end ground connection of described the 14 electric capacity, the earth terminal ground connection of described the first comparator, the output of described the first comparator is connected with described the 3rd optical coupling isolation circuit.
Described the 3rd optical coupling isolation circuit comprises the 17 resistance, the 18 resistance, the 18 electric capacity and the 3rd optocoupler; One end of described the 17 resistance is connected with described the first voltage comparator circuit, one end of the other end of described the 17 resistance, one end of described the 18 resistance, described the 18 electric capacity is connected with the end of oppisite phase of described the 3rd optocoupler, the other end of described the 18 resistance, the other end of described the 18 electric capacity are connected with the positive terminal of described the 3rd optocoupler and it connects termination 5V voltage, and the emitter and collector of described the 3rd optocoupler is connected with described transistor switching circuit.
Described transistor switching circuit comprises the 19 resistance, the 20 resistance, the 3rd diode, the 3rd triode and resettable fuse, one end of described the 20 resistance is connected with described the 3rd optical coupling isolation circuit, other end ground connection, one end of described the 19 resistance is connected with the base stage of described the 3rd triode and its link is connected with described the 3rd optical coupling isolation circuit, the emitter stage of the other end of described the 19 resistance and described the 3rd triode, the negative pole of described the 3rd diode connects and it connects termination 24V voltage, the colelctor electrode of described the 3rd triode, described the 3rd positive pole of diode and one end of described resettable fuse are connected, the other end of resettable fuse is connected with the input of the controller of described application apparatus.
Compared with prior art, the advantage of a kind of safe torque turn-off function circuit of the present utility model is:
(1) circuit of the present utility model adopts two independently STO control channels, any one control channel fault does not affect another one passage independently carries out it and prevents from producing when motor from stopping the function of torque, and circuit of the present utility model is hardware implement, shield all software attempts, the fault rate of safe torque turn-off function is reduced, more safe and reliable.
(2) circuit of the present utility model has STO input control voltage under-voltage protecting circuit, can prevent that low-voltage from misleading, further more protection function.
(3) circuit of the present utility model has STO state feedback function, the running status of STO can be fed back to system.
(4) circuit structure number of elements design of the present utility model is more excellent, and circuit cost is low.
Brief description of the drawings
Fig. 1 is the theory diagram of a kind of safe torque turn-off function circuit of the present utility model;
Fig. 2 is the circuit diagram of a kind of safe torque turn-off function circuit of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail, but not as to restriction of the present utility model.
As shown in Figure 1, the utility model is applied to the safe torque turn-off function of the one circuit of injection machine, comprises a STO control channel, the 2nd STO control channel, feedback line. The one STO control channel comprises: an EMC (ElectroMagneticCompatibility; Electro Magnetic Compatibility) circuit 11, the first under-voltage protecting circuit 12, the first optical coupling isolation circuit 13, the 3rd under-voltage protecting circuit 14, an IGBT (InsulatedGateBipolarTransistor, insulated gate bipolar transistor) control power switch circuit 15 and tertiary voltage comparison circuit 16. The 2nd STO control channel comprises: the 2nd EMC circuit 21, the second under-voltage protecting circuit 22, the second optical coupling isolation circuit 23, the 4th under-voltage protecting circuit 24, the 2nd IGBT control power switch circuit 25 and the 4th voltage comparator circuit 26. Feedback line comprises: the first voltage comparator circuit 31, second voltage comparison circuit 32, the 3rd optical coupling isolation circuit 33 and transistor switching circuit 34.
The output of the one input of EMC circuit 11 and the controller of application apparatus is connected, in the present embodiment, be connected with the output of controller of plastic injection molding, the output of the one EMC circuit 11 is connected with the input of the first under-voltage protecting circuit 12, the output of the first under-voltage protecting circuit 12 is connected with the input of the first optical coupling isolation circuit 13, the output of the first optical coupling isolation circuit 13 is connected with the input of the 3rd under-voltage protecting circuit 14, the output of the 3rd under-voltage protecting circuit 14 is connected with the control end that an IGBT controls power switch circuit 15, the output that the one IGBT controls power switch circuit 15 is connected with the input of tertiary voltage comparison circuit 16, the output that the one IGBT controls power switch circuit 15 is connected with the drive plate in motor driver, the output of tertiary voltage comparison circuit 16 is connected with the mainboard in motor driver.
The 2nd input of EMC circuit 21 and the output of controller of plastic injection molding are connected, the output of the 2nd EMC circuit 21 is connected with the input of the second under-voltage protecting circuit 22, the output of the second under-voltage protecting circuit 22 is connected with the input of the second optical coupling isolation circuit 23, the output of the second optical coupling isolation circuit 23 is connected with the input of the 4th under-voltage protecting circuit 24, the output of the 4th under-voltage protecting circuit 24 is connected with the control end that the 2nd IGBT controls power switch circuit 25, the output that the 2nd IGBT controls power switch circuit 25 is connected with the input of the 4th voltage comparator circuit 26, the output that the 2nd IGBT controls power switch circuit 25 is connected with the drive plate in motor driver, the output of the 4th voltage comparator circuit 26 is connected with the mainboard in motor driver.
The input of the first voltage comparator circuit 31 is connected with the output that an IGBT controls power switch circuit 15, the output of the first voltage comparator circuit 31 is connected with the input of the 3rd optical coupling isolation circuit 33, the input of second voltage comparison circuit 32 is connected with the output that the 2nd IGBT controls power switch circuit 25, the output of second voltage comparison circuit 26 is connected with the input of the 3rd optical coupling isolation circuit 33, the output of the 3rd optical coupling isolation circuit 33 is connected with the input of transistor switching circuit 34, the output of transistor switching circuit 34 is connected with the input of controller of plastic injection molding.
As shown in Figure 2, in the present embodiment, an EMC circuit 11 comprises the first capacitor C 1, the second capacitor C 2 and TVS (TransientVoltageSuppressor) protection device D1. The cathode output end STO1+ of controller of plastic injection molding interface is connected with one end of one end of the first capacitor C 1, a TVS protection device D1 and its link is connected with the first under-voltage protecting circuit 12; the other end of the first capacitor C 1 is connected with one end of the second capacitor C 2 and its link picks shell ground, and the cathode output end STO1-of controller of plastic injection molding interface is connected and its link is connected with the first under-voltage protecting circuit 12 for the other end, an other end of TVS protection device D1 of the second capacitor C 2. The one EMC circuit 11 can suppress the input electromagnetic interference of STO1+ and STO1-.
The first under-voltage protecting circuit 12 comprises the first resistance R 1, the second resistance R 2, the 3rd capacitor C 3, the tenth diode D10 and the first Zener diode ZD1. one end of the first resistance R 1 is connected with the electrode input end STO1+ of an EMC circuit 11, one end of the other end of the first resistance R 1 and the second resistance R 2, one end of the 3rd capacitor C 3, the negative pole of the first Zener diode ZD1 connects, the positive pole of the first Zener diode ZD1 is connected with the negative pole of the tenth diode D10 and its link is connected with the positive terminal of the first optocoupler PC1 of the first optical coupling isolation circuit 13, the other end of the positive pole of the tenth diode D10 and the second resistance R 2, the other end of the 3rd capacitor C 3 connect and its link respectively with the negative input STO1-of an EMC circuit 11, the end of oppisite phase of the first optocoupler PC1 of the first optical coupling isolation circuit 13 connects. the first under-voltage protecting circuit 12 can detect the voltage of a STO control channel input control signal, when the control voltage of input is during lower than STO conducting voltage lower limit, and the first not conducting of Zener diode ZD1.
The first optical coupling isolation circuit 13 comprises the first optocoupler PC1, and the positive terminal of the first optocoupler PC1 is connected with the negative pole of the tenth diode D10, and end of oppisite phase is connected with the positive pole of the tenth diode D10, grounded emitter, and colelctor electrode is connected with the 3rd under-voltage protecting circuit 14. In the time of the first Zener diode ZD1 normally in the first under-voltage protecting circuit 12, the input conducting of the first optocoupler PC1, makes the output conducting of the first optocoupler PC1, and makes the signal photoelectricity isolation of input and output.
The 3rd under-voltage protecting circuit 14 comprises the 4th resistance R 4 and the 3rd Zener diode ZD3. The positive pole of the 3rd Zener diode ZD3 is connected with the colelctor electrode of the first optocoupler PC1, and the negative pole of the 3rd Zener diode ZD3 is connected with one end of the 4th resistance R 4, and the other end of the 4th resistance R 4 is controlled power switch circuit 15 with an IGBT and is connected. The 3rd under-voltage protecting circuit 14 can detect an IGBT and control the input 5V voltage of power switch circuit 15, when input terminal voltage is during lower than STO conducting voltage lower limit, and the 3rd not conducting of Zener diode ZD3.
The one IGBT controls power switch circuit 15 and comprises the 3rd resistance R 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6 and the first triode Q1. one end of the 3rd resistance R 3, one end of the 4th capacitor C 4, the base stage of the first triode Q1 is connected with one end of the 4th resistance R 4, the other end of the 3rd resistance R 3, the other end of the 4th capacitor C 4 is connected with the emitter stage of the first triode Q1 and its link is also connected with 5V voltage, one end of the colelctor electrode of the first triode Q1 and the 5th capacitor C 5, one end of the 6th capacitor C 6 connect and its link respectively with the first voltage comparator circuit 31, drive plate in tertiary voltage comparison circuit 16 and motor driver connects, the other end of the 5th capacitor C 5 is connected with the other end of the 6th capacitor C 6 and its link ground connection. the one IGBT controls power switch circuit 15 and turns on and off for controlling IGBT. in the time of the 3rd Zener diode ZD3 normally in the 3rd under-voltage protecting circuit 14, the first triode Q1 conducting, by input 5V voltage, by the first triode Q1 output, the output that an IGBT controls power switch circuit 15 has Voltage-output.
Tertiary voltage comparison circuit 16 comprises the 25 resistance R the 25, the 26 resistance R the 26, the 27 resistance R the 27, the 28 resistance R the 28, the 21 resistance R the 21, the 22 resistance R the 22, the 21 capacitor C the 21, the 22 capacitor C the 22, the 19 capacitor C 19 and the 3rd comparator U1C. one end of the 26 resistance R 26 is connected with 5V voltage, the other end of the 26 resistance R 26, one end of the 25 resistance R 25, one end of the 21 capacitor C 21 is connected with the in-phase input end of the 3rd comparator U1C, the other end of the 25 resistance R 25 is connected with the other end of the 21 capacitor C 21 and its link ground connection, one end of the 27 resistance R 27 is connected with the colelctor electrode of the first triode Q1, the other end of the 27 resistance R 27, one end of the 28 resistance R 28, one end of the 22 capacitor C 22 is connected with the inverting input of the 3rd comparator U1C, the other end of the 28 resistance R 28 is connected with the other end of the 22 capacitor C 22 and its link ground connection, the output of the 3rd comparator U1C is connected with one end of the 21 resistance R 21, the 21 other end of resistance R 21 and one end of the 22 resistance R 22, one end of the 19 capacitor C 19 connects and its link is connected with the mainboard in motor driver, to mainboard output STO1out signal, the other end of the 22 resistance R 22 is connected with 5V voltage, the other end ground connection of the 19 capacitor C 19. tertiary voltage comparison circuit 16 is by 5V voltage, after electric resistance partial pressure, be input to the in-phase input end of the 3rd comparator U1C, an IGBT is controlled the output voltage in power switch circuit 15 by tertiary voltage comparison circuit 16, after electric resistance partial pressure, be input to the inverting input of the 3rd comparator U1C, voltage is the signal from the output output relatively of the 3rd comparator U1C after relatively, exports STO1out signal to the mainboard in motor driver through the 21 resistance R 21. when the collector terminal of the first triode Q1 of controlling power switch circuit 15 as an IGBT has Voltage-output, the output output low level signal of the 3rd comparator U1C, STO1out signal is low level, this signal is exported to the mainboard in motor driver.
In the present embodiment, the 2nd EMC circuit 21 comprises the 7th capacitor C 7, the 8th capacitor C 8 and the 2nd TVS protection device D2. The cathode output end STO2+ of controller of plastic injection molding interface is connected with one end of one end of the 7th capacitor C 7, the 2nd TVS protection device D2 and its link is connected with the second under-voltage protecting circuit 22; the other end of the 7th capacitor C 7 is connected with one end of the 8th capacitor C 8 and its link picks shell ground, and the cathode output end STO2-of controller of plastic injection molding interface is connected and its link is connected with the second under-voltage protecting circuit 22 for the other end, the 2nd other end of TVS protection device D2 of the 8th capacitor C 8. The 2nd EMC circuit 21 can suppress the input electromagnetic interference of STO2+ and STO2-.
The second under-voltage protecting circuit 22 comprises the 5th resistance R 5, the 6th resistance R 6, the 9th capacitor C the 9, the 11 diode D11 and the second Zener diode ZD2. one end of the 5th resistance R 5 is connected with the electrode input end STO2+ of the 2nd EMC circuit 21, one end of the other end of the 5th resistance R 5 and the 6th resistance R 6, one end of the 9th capacitor C 9, the negative pole of the second Zener diode ZD2 connects, the positive pole of the second Zener diode ZD2 is connected with the negative pole of the 11 diode D11 and its link is connected with the positive terminal of the second optocoupler PC2 of the second optical coupling isolation circuit 23, the other end of the positive pole of the 11 diode D11 and the 6th resistance R 6, the other end of the 9th capacitor C 9 connect and its link respectively with the negative input STO2-of the 2nd EMC circuit 21, the end of oppisite phase of the second optocoupler PC2 of the second optical coupling isolation circuit 23 connects. the second under-voltage protecting circuit 22 can detect the voltage of the 2nd STO control channel input control signal, when the control voltage of input is during lower than STO conducting voltage lower limit, and the second not conducting of Zener diode ZD2.
The second optical coupling isolation circuit 23 comprises the second optocoupler PC2, and the positive terminal of the second optocoupler PC2 is connected with the negative pole of the 11 diode D11, and end of oppisite phase is connected with the positive pole of the 11 diode D11, grounded emitter, and colelctor electrode is connected with the 4th under-voltage protecting circuit 24. In the time of the second Zener diode ZD2 normally in the second under-voltage protecting circuit 22, the input conducting of the second optocoupler PC2, makes the output conducting of the second optocoupler PC2, and makes the signal photoelectricity isolation of input and output.
The 4th under-voltage protecting circuit 24 comprises the 8th resistance R 8 and the 4th Zener diode ZD4. The positive pole of the 4th Zener diode ZD4 is connected with the colelctor electrode of the second optocoupler PC2, and the negative pole of the 4th Zener diode ZD4 is connected with one end of the 8th resistance R 8, and the other end of the 8th resistance R 8 is controlled power switch circuit 25 with the 2nd IGBT and is connected. The 4th under-voltage protecting circuit 24 can detect the 2nd IGBT and control the input 5V voltage of power switch circuit 25, when input terminal voltage is during lower than STO conducting voltage lower limit, and the 4th not conducting of Zener diode ZD4.
The 2nd IGBT controls power switch circuit 25 and comprises the 7th resistance R 7, the tenth capacitor C the 10, the 11 capacitor C the 11, the 12 capacitor C 12 and the second triode Q2. one end of the 7th resistance R 7, one end of the tenth capacitor C 10, the base stage of the second triode Q2 is connected with one end of the 8th resistance R 8, the other end of the 7th resistance R 7, the other end of the tenth capacitor C 10 is connected with the emitter stage of the second triode Q2 and its link is also connected with 5V voltage, the second colelctor electrode of triode Q2 and one end of the 11 capacitor C 11, one end of the 12 capacitor C 12 connect and its link respectively with second voltage comparison circuit 32, drive plate in the 4th voltage comparator circuit 26 and motor driver connects, the other end of the 11 capacitor C 11 is connected with the other end of the 12 capacitor C 12 and its link ground connection. the 2nd IGBT controls power switch circuit 25 and turns on and off for controlling IGBT. in the time of the 4th Zener diode ZD4 normally in the 4th under-voltage protecting circuit 24, the second triode Q2 conducting, by input 5V voltage, by the second triode Q2 output, the output that the 2nd IGBT controls power switch circuit 25 has Voltage-output.
The 4th voltage comparator circuit 26 comprises the 29 resistance R the 29, the 30 resistance R the 30, the 31 resistance R the 31, the 32 resistance R the 32, the 23 resistance R the 23, the 24 resistance R the 24, the 23 capacitor C the 23, the 24 capacitor C the 24, the 20 capacitor C 20 and the 4th comparator U1D. one end of the 30 resistance R 30 is connected with 5V voltage, the other end of the 30 resistance R 30, one end of the 29 resistance R 29, one end of the 23 capacitor C 23 is connected with the in-phase input end of the 4th comparator U1D, the other end of the 29 resistance R 29 is connected with the other end of the 23 capacitor C 23 and its link ground connection, one end of the 31 resistance R 31 is connected with the colelctor electrode of the second triode Q2, the other end of the 31 resistance R 31, one end of the 32 resistance R 32, one end of the 24 capacitor C 24 is connected with the inverting input of the 4th comparator U1D, the other end of the 32 resistance R 32 is connected with the other end of the 24 capacitor C 24 and its link ground connection, the output of the 4th comparator U1D is connected with one end of the 23 resistance R 23, the 23 other end of resistance R 23 and one end of the 24 resistance R 24, one end of the 20 capacitor C 20 connects and its link is connected with the mainboard in motor driver, to mainboard output STO2out signal, the other end of the 24 resistance R 24 is connected with 5V voltage, the other end ground connection of the 20 capacitor C 20. the 4th voltage comparator circuit 26 is by 5V voltage, after electric resistance partial pressure, be input to the in-phase input end of the 4th comparator U1D, the 2nd IGBT is controlled the output voltage in power switch circuit 25 by the 4th voltage comparator circuit 26, after electric resistance partial pressure, be input to the inverting input of the 4th comparator U1D, voltage is the signal from the output output relatively of the 4th comparator U1D after relatively, exports STO2out signal to the mainboard in motor driver through the 23 resistance R 23. when the collector terminal of the second triode Q2 of controlling power switch circuit 25 as the 2nd IGBT has Voltage-output, the output output low level signal of the 4th comparator U1D, STO2out signal is low level, this signal is exported to the mainboard in motor driver.
The first voltage comparator circuit 31 comprises the 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R the 11, the 12 resistance R the 12, the 13 capacitor C the 13, the 14 capacitor C the 14, the 15 capacitor C 15 and the first comparator U1A. one end of the 9th resistance R 9 is connected with the emitter stage of the first triode Q1, the other end of the 9th resistance R 9, one end of the 11 resistance R 11, one end of the 13 capacitor C 13 is connected with the in-phase input end of the first comparator U1A, the other end of the 11 resistance R 11 is connected with the other end of the 13 capacitor C 13 and its link ground connection, one end of the tenth resistance R 10 is connected with the colelctor electrode of the first triode Q1, the other end of the tenth resistance R 10, one end of the 12 resistance R 12, one end of the 15 capacitor C 15 is connected with the inverting input of the first comparator U1A, the other end of the 12 resistance R 12 is connected with the other end of the 15 capacitor C 15 and its link ground connection, first power end of comparator U1A and one end of the 14 capacitor C 14 and 5V voltage is connected, the other end ground connection of the 14 capacitor C 14, the earth terminal ground connection of the first comparator U1A, the output of the first comparator U1A is connected with the 3rd optical coupling isolation circuit 33. the first voltage comparator circuit 31 is by 5V voltage, after electric resistance partial pressure, be input to the in-phase input end of the first comparator U1A, an IGBT is controlled the output voltage in power switch circuit 15 by the first voltage comparator circuit 31, after electric resistance partial pressure, be input to the inverting input of the first comparator U1A, voltage is the signal from the output output relatively of the first comparator U1A after relatively. when the collector terminal of the first triode Q1 of controlling power switch circuit 15 as an IGBT has Voltage-output, the output output low level signal of the first comparator U1A.
Second voltage comparison circuit 32 comprises the 14 resistance R the 14, the 15 resistance R the 15, the 13 resistance R the 13, the 16 resistance R the 16, the 16 capacitor C the 16, the 17 capacitor C 17 and the second comparator U1B. one end of the 14 resistance R 14 is connected with the emitter stage of the second triode Q2, the other end of the 14 resistance R 14, one end of the 13 resistance R 13, one end of the 16 capacitor C 16 is connected with the in-phase input end of the second comparator U1B, the other end of the 13 resistance R 13 is connected with the other end of the 16 capacitor C 16 and its link ground connection, one end of the 15 resistance R 15 is connected with the colelctor electrode of the second triode Q2, the other end of the 15 resistance R 15, one end of the 16 resistance R 16, one end of the 17 capacitor C 17 is connected with the inverting input of the second comparator U1B, the other end of the 16 resistance R 16 is connected with the other end of the 17 capacitor C 17 and its link ground connection, the output of the second comparator U1B is connected with the 3rd optical coupling isolation circuit 33. second voltage comparison circuit 32 is by 5V voltage, after electric resistance partial pressure, be input to the in-phase input end of the second comparator U1B, the 2nd IGBT is controlled the output voltage in power switch circuit 25 by second voltage comparison circuit 32, after electric resistance partial pressure, be input to the inverting input of the second comparator U1B, voltage is the signal from the output output relatively of the second comparator U1B after relatively. when the collector terminal of the second triode Q2 of controlling power switch circuit 25 as the 2nd IGBT has Voltage-output, the output output low level signal of the second comparator U1B.
The 3rd optical coupling isolation circuit 33 comprises the 17 resistance R the 17, the 18 resistance R the 18, the 18 capacitor C 18 and the 3rd optocoupler PC3. One end of the 17 resistance R 17 is connected with the output of the second comparator U1B in output, the second voltage comparison circuit 32 of the first comparator U1A in the first voltage comparator circuit 31 respectively, one end of the other end of the 17 resistance R 17, one end of the 18 resistance R 18, the 18 capacitor C 18 is connected with the end of oppisite phase of the 3rd optocoupler PC3, the other end of the 18 resistance R 18, the other end of the 18 capacitor C 18 are connected with the positive terminal of the 3rd optocoupler PC3 and it connects termination 5V voltage, and the emitter and collector of the 3rd optocoupler PC3 is connected with transistor switching circuit 34.
Transistor switching circuit 34 comprises the 19 resistance R the 19, the 20 resistance R 20, the 3rd diode D3, the 3rd triode Q3 and resettable fuse F1. One end of the 20 resistance R 20 is connected with the emitter stage of the 3rd optocoupler PC3, the other end ground connection of the 20 resistance R 20, one end of the 19 resistance R 19, the base stage of the 3rd triode Q3 are connected with the colelctor electrode of the 3rd optocoupler PC3, the emitter stage of the other end of the 19 resistance R 19 and the 3rd triode Q3, the negative pole of the 3rd diode D3 is connected and its link is connected with 24V voltage, the colelctor electrode of the 3rd triode Q3, the positive pole of the 3rd diode D3 are connected with one end of resettable fuse F1, and the other end of resettable fuse F1 is connected with the input of controller of plastic injection molding. In the time of the 3rd optocoupler PC3 conducting in the 3rd optical coupling isolation circuit 33, the 3rd triode Q3 conducting, resettable fuse F1 output STOFB high level signal, this signal is exported to controller of plastic injection molding.
The principle of a kind of safe torque turn-off function circuit of the present utility model is: in the time that the system fault-free of for example injection machine of application apparatus is exported, between two interface input STO1+ and STO1-, input 24V rank (15V～30V) and control voltage, the first Zener diode ZD1 conducting, then positive terminal and the end of oppisite phase of the first optocoupler PC1 have electric current to pass through, make the collector and emitter conducting of the first optocoupler PC1, then the 3rd Zener diode ZD3 conducting, the first also conducting of triode Q1, the collector terminal of the first triode Q1 has Voltage-output to the drive plate in driver, provide voltage for controlling turning on and off of IGBT. on the other hand, tertiary voltage comparison circuit 16 is by 5V voltage, after electric resistance partial pressure, be input to the in-phase input end of the 3rd comparator U1C, an IGBT is controlled the output voltage in power switch circuit 15 by tertiary voltage comparison circuit 16, after electric resistance partial pressure, be input to the inverting input of the 3rd comparator U1C, voltage is the signal from the output output relatively of the 3rd comparator U1C after relatively, in the time that the collector terminal of above-mentioned the first triode Q1 has Voltage-output, the 3rd comparator U1C inverting input voltage ratio in-phase input end voltage is high, the output output low level signal of the 3rd comparator U1C, and by the 21 resistance R 21, output STO1out low level signal, be that normal working signal is to the mainboard in motor driver.
In addition, the first voltage comparator circuit 31 is by 5V voltage, after electric resistance partial pressure, be input to the in-phase input end of the first comparator U1A, an IGBT is controlled the output voltage in power switch circuit 15 by the first voltage comparator circuit 31, after electric resistance partial pressure, be input to the inverting input of the first comparator U1A, voltage is the signal from the output output relatively of the first comparator U1A after relatively, in the time that the collector terminal of above-mentioned the first triode Q1 has Voltage-output, the first comparator U1A inverting input voltage ratio in-phase input end voltage is high, the output output low level signal of the first comparator U1A, make the 3rd optocoupler PC3 conducting, also make thus the 3rd triode Q3 conducting, 24V high level is by the 3rd triode Q3, after resettable fuse F1, export STOFB high level signal, be that normal working signal feeds back to controller of plastic injection molding.
It should be noted that; the foregoing is only preferred embodiment of the present utility model; not thereby limit scope of patent protection of the present utility model, the utility model can also carry out to the structure of above-mentioned various parts the improvement of structure, or adopts technical equivalents thing to replace. Therefore the equivalent structure that all utilizations description of the present utility model and diagramatic content are done changes, or directly or indirectly apply to other correlative technology fields and be all in like manner all contained in the scope that the utility model contains.
Claims (10)
1. a safe torque turn-off function circuit, it is characterized in that, comprise the STO control channel being formed by an EMC circuit, the first under-voltage protecting circuit, the first optical coupling isolation circuit, the 3rd under-voltage protecting circuit, an IGBT control power switch circuit and tertiary voltage comparison circuit; The 2nd STO control channel being formed by the 2nd EMC circuit, the second under-voltage protecting circuit, the second optical coupling isolation circuit, the 4th under-voltage protecting circuit, the 2nd IGBT control power switch circuit and the 4th voltage comparator circuit; And the feedback line being formed by the first voltage comparator circuit, second voltage comparison circuit, the 3rd optical coupling isolation circuit and transistor switching circuit;
The output of a described input for EMC circuit and the controller of application apparatus is connected, the output of a described EMC circuit is connected with the input of described the first under-voltage protecting circuit, the output of described the first under-voltage protecting circuit is connected with the input of described the first optical coupling isolation circuit, the output of described the first optical coupling isolation circuit is connected with the input of described the 3rd under-voltage protecting circuit, the output of described the 3rd under-voltage protecting circuit is connected with the control end that a described IGBT controls power switch circuit, the output that a described IGBT controls power switch circuit is connected with the input of described tertiary voltage comparison circuit, the output that a described IGBT controls power switch circuit is connected with the drive plate in motor driver, the output of described tertiary voltage comparison circuit is connected with the mainboard in motor driver,
The output of described the 2nd input of EMC circuit and the controller of application apparatus is connected, the output of described the 2nd EMC circuit is connected with the input of described the second under-voltage protecting circuit, the output of described the second under-voltage protecting circuit is connected with the input of described the second optical coupling isolation circuit, the output of described the second optical coupling isolation circuit is connected with the input of described the 4th under-voltage protecting circuit, the output of described the 4th under-voltage protecting circuit is connected with the control end that described the 2nd IGBT controls power switch circuit, the output that described the 2nd IGBT controls power switch circuit is connected with the input of described the 4th voltage comparator circuit, the output that described the 2nd IGBT controls power switch circuit is connected with the drive plate in motor driver, the output of described the 4th voltage comparator circuit is connected with the mainboard in motor driver,
The input of described the first voltage comparator circuit is connected with the output that a described IGBT controls power switch circuit, the output of described the first voltage comparator circuit is connected with the input of described the 3rd optical coupling isolation circuit, the input of described second voltage comparison circuit is connected with the output that described the 2nd IGBT controls power switch circuit, the output of described second voltage comparison circuit is connected with the input of described the 3rd optical coupling isolation circuit, described the 3rd output of optical coupling isolation circuit and the input of described transistor switching circuit are connected, the output of described transistor switching circuit is connected with the input of the controller of described application apparatus.
2. safe torque turn-off function circuit as claimed in claim 1, is characterized in that, a described EMC circuit comprises the first electric capacity, the second electric capacity and a TVS protection device; The cathode output end of the control unit interface of described application apparatus is connected with one end of one end of described the first electric capacity, described TVS protection device and its link is connected with described the first under-voltage protecting circuit; the other end of described the first electric capacity is connected with one end of described the second electric capacity and its link picks shell ground, the cathode output end of the other end, the other end of described TVS protection device and the control unit interface of described application apparatus of described the second electric capacity is connected and its link is connected with described the first under-voltage protecting circuit.
3. safe torque turn-off function circuit as claimed in claim 1, is characterized in that, described the first under-voltage protecting circuit comprises the first resistance, the second resistance, the 3rd electric capacity, the tenth diode and the first Zener diode; One end of described the first resistance is connected with a described EMC circuit, the other end of the first resistance is connected with one end of one end of described the second resistance, described the 3rd electric capacity, the negative pole of described the first Zener diode, the positive pole of described the first Zener diode is connected with the negative pole of described the tenth diode, and the positive pole of described the tenth diode is connected with the other end of the other end of described the second resistance, described the 3rd electric capacity and its link is connected with a described EMC circuit.
4. safe torque turn-off function circuit as claimed in claim 1; it is characterized in that; described the first optical coupling isolation circuit comprises the first optocoupler; the positive terminal of described the first optocoupler is connected with described the first under-voltage protecting circuit respectively with end of oppisite phase; the grounded emitter of described the first optocoupler, the colelctor electrode of described the first optocoupler is connected with described the 3rd under-voltage protecting circuit.
5. safe torque turn-off function circuit as claimed in claim 1, is characterized in that, described the 3rd under-voltage protecting circuit comprises the 4th resistance and the 3rd Zener diode; The positive pole of described the 3rd Zener diode is connected with described the first optical coupling isolation circuit, and the negative pole of described the 3rd Zener diode is connected with one end of described the 4th resistance, and the other end of described the 4th resistance is controlled power switch circuit with a described IGBT and is connected.
6. safe torque turn-off function circuit as claimed in claim 1, is characterized in that, a described IGBT controls power switch circuit and comprises the 3rd resistance, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity and the first triode, one end of the base stage of described the first triode and described the 3rd resistance, one end of described the 4th electric capacity connects and its link is connected with described the 3rd under-voltage protecting circuit, the other end of the emitter stage of described the first triode and described the 3rd resistance, the other end of described the 4th electric capacity and 5V voltage connect, one end of the colelctor electrode of described the first triode and described the 5th electric capacity, one end of the 6th electric capacity connects and its link and described the first voltage comparator circuit, drive plate in described tertiary voltage comparison circuit and described motor driver connects, the other end of described the 5th electric capacity is connected with the other end of described the 6th electric capacity and its link ground connection.
7. safe torque turn-off function circuit as claimed in claim 1, it is characterized in that, described tertiary voltage comparison circuit comprises the 25 resistance, the 26 resistance, the 27 resistance, the 28 resistance, the 21 resistance, the 22 resistance, the 21 electric capacity, the 22 electric capacity, the 19 electric capacity and the 3rd comparator, one end of described the 26 resistance is connected with 5V voltage, the other end of described the 26 resistance, one end of described the 25 resistance, one end of described the 21 electric capacity is connected with the in-phase input end of described the 3rd comparator, the other end of described the 25 resistance, the other end of described the 21 electric capacity connects and its link ground connection, one end of described the 27 resistance is controlled power switch circuit with a described IGBT and is connected, the other end of described the 27 resistance, one end of described the 28 resistance, one end of described the 22 electric capacity is connected with the inverting input of described the 3rd comparator, the other end of described the 28 resistance, the other end of described the 22 electric capacity connects and its link ground connection, the output of described the 3rd comparator is connected with one end of described the 21 resistance, described the 21 other end of resistance and one end of described the 22 resistance, one end of described the 19 electric capacity connects and its link is connected with the mainboard in described motor driver, the other end of described the 22 resistance is connected with 5V voltage, the other end ground connection of described the 19 electric capacity.
8. safe torque turn-off function circuit as claimed in claim 1, it is characterized in that, described the first voltage comparator circuit comprises the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 electric capacity, the 14 electric capacity, the 15 electric capacity and the first comparator, one end of described the 9th resistance is connected with 5V voltage, the other end of described the 9th resistance, one end of the 11 resistance, one end of the 13 electric capacity is connected with the in-phase input end of described the first comparator, the other end of described the 11 resistance is connected with the other end of described the 13 electric capacity and its link ground connection, one end of described the tenth resistance is controlled power switch circuit with a described IGBT and is connected, the other end of described the tenth resistance, one end of the 12 resistance, one end of the 15 electric capacity is connected with the inverting input of described the first comparator, the other end of described the 12 resistance is connected with the other end of described the 15 electric capacity and its link ground connection, the power end of described the first comparator is connected with one end of described the 14 electric capacity and 5V voltage, the other end ground connection of described the 14 electric capacity, the earth terminal ground connection of described the first comparator, the output of described the first comparator is connected with described the 3rd optical coupling isolation circuit.
9. safe torque turn-off function circuit as claimed in claim 1, is characterized in that, described the 3rd optical coupling isolation circuit comprises the 17 resistance, the 18 resistance, the 18 electric capacity and the 3rd optocoupler; One end of described the 17 resistance is connected with described the first voltage comparator circuit, one end of the other end of described the 17 resistance, one end of described the 18 resistance, described the 18 electric capacity is connected with the end of oppisite phase of described the 3rd optocoupler, the other end of described the 18 resistance, the other end of described the 18 electric capacity are connected with the positive terminal of described the 3rd optocoupler and it connects termination 5V voltage, and the emitter and collector of described the 3rd optocoupler is connected with described transistor switching circuit.
10. safe torque turn-off function circuit as claimed in claim 1, is characterized in that, described transistor switching circuit comprises the 19 resistance, the 20 resistance, the 3rd diode, the 3rd triode and resettable fuse, one end of described the 20 resistance is connected with described the 3rd optical coupling isolation circuit, other end ground connection, one end of described the 19 resistance is connected with the base stage of described the 3rd triode and its link is connected with described the 3rd optical coupling isolation circuit, the emitter stage of the other end of described the 19 resistance and described the 3rd triode, the negative pole of described the 3rd diode connects and it connects termination 24V voltage, the colelctor electrode of described the 3rd triode, described the 3rd positive pole of diode and one end of described resettable fuse are connected, the other end of resettable fuse is connected with the input of the controller of described application apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521041489.3U CN205319683U (en) | 2015-12-14 | 2015-12-14 | Safe torque shutoff functional circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521041489.3U CN205319683U (en) | 2015-12-14 | 2015-12-14 | Safe torque shutoff functional circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205319683U true CN205319683U (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521041489.3U Withdrawn - After Issue CN205319683U (en) | 2015-12-14 | 2015-12-14 | Safe torque shutoff functional circuit |
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| CN (1) | CN205319683U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449638A (en) * | 2015-12-14 | 2016-03-30 | 宁波安信数控技术有限公司 | Safe torque turnoff function circuit |
| CN106877291A (en) * | 2017-04-21 | 2017-06-20 | 南京埃斯顿自动控制技术有限公司 | A kind of safe torque breaking circuit and system |
| CN108233338A (en) * | 2016-12-15 | 2018-06-29 | 博世力士乐(西安)电子传动与控制有限公司 | Converter power supply device and the frequency converter comprising the device |
| CN112947387A (en) * | 2021-03-29 | 2021-06-11 | 苏州伟创电气科技股份有限公司 | Diagnostic device and safe torque shutoff system |
-
2015
- 2015-12-14 CN CN201521041489.3U patent/CN205319683U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449638A (en) * | 2015-12-14 | 2016-03-30 | 宁波安信数控技术有限公司 | Safe torque turnoff function circuit |
| CN105449638B (en) * | 2015-12-14 | 2017-10-27 | 宁波安信数控技术有限公司 | A kind of safe torque turn-off function circuit |
| CN108233338A (en) * | 2016-12-15 | 2018-06-29 | 博世力士乐(西安)电子传动与控制有限公司 | Converter power supply device and the frequency converter comprising the device |
| CN108233338B (en) * | 2016-12-15 | 2021-04-30 | 博世力士乐(西安)电子传动与控制有限公司 | Frequency converter power supply device and frequency converter comprising same |
| CN106877291A (en) * | 2017-04-21 | 2017-06-20 | 南京埃斯顿自动控制技术有限公司 | A kind of safe torque breaking circuit and system |
| CN106877291B (en) * | 2017-04-21 | 2019-06-28 | 南京埃斯顿自动化股份有限公司 | A kind of safe torque breaking circuit and system |
| CN112947387A (en) * | 2021-03-29 | 2021-06-11 | 苏州伟创电气科技股份有限公司 | Diagnostic device and safe torque shutoff system |
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