CN105576952A - Safe torque off (STO) control circuit and system - Google Patents

Safe torque off (STO) control circuit and system Download PDF

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Publication number
CN105576952A
CN105576952A CN201511022226.2A CN201511022226A CN105576952A CN 105576952 A CN105576952 A CN 105576952A CN 201511022226 A CN201511022226 A CN 201511022226A CN 105576952 A CN105576952 A CN 105576952A
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China
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resistance
output
circuit
sto
input
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CN201511022226.2A
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CN105576952B (en
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梁剑龙
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INVT POWER ELECTRONICS (SUZHOU) Co.,Ltd.
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Shenzhen Invt Electric Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • H02M1/325Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters

Abstract

The application provides a safe torque off (STO) control circuit and system. The STO control circuit comprises a signal conversion circuit, a first photocoupling circuit, a second photocoupling circuit, a first NOT gate, a second NOT gate, a third NOT gate, a fourth NOT gate, a first RC filter circuit and a second RC filter circuit, wherein the first photocoupling circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a first diode, a second diode, a third diode, a fourth diode, a first voltage stabilization diode and a first isolation photocoupler, and the second photocoupling circuit comprises a fourth resistor, a fifth resistor, a sixth resistor, a third capacitor, a fourth capacitor, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a second voltage stabilization diode and a second isolation photocoupler. In the application, the STO control circuit provided by the invention is used for achieving an STO function and circuit self-detection.

Description

STO control circuit and system
Technical field
The application relates to field of power electronics, particularly a kind of STO (SafeTorqueOff, security interrupt torque) control circuit and system.
Background technology
At present, along with the application of adjustable speed electrical equipment (as frequency converter) in daily life and industry is more and more extensive, more and more higher to the Security Function Requirements of adjustable speed electrical equipment.
For the adjustable speed electrical equipment controlling motor, when there is the faults such as hypervelocity or accidental activation when it, need the Driving Torque of the motor of reliably positive closing adjustable speed electrical equipment to meet safety requirements.Aforesaid operations by STO functional realiey, if adjustable speed electrical equipment possesses STO function, then can promote the safety function of adjustable speed electrical equipment greatly.
But, still there is not a kind of STO control circuit at present to realize the reliable STO function of adjustable speed electrical equipment.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of STO control circuit and system, and to reach the object realizing STO function and circuitry self test, technical scheme is as follows:
A kind of STO control circuit, comprising: signaling conversion circuit, the first photoelectric coupled circuit, the first shaping circuit and a RC filter circuit;
The input of described signaling conversion circuit, for receiving the first narrow pulse signal;
The first input end of described first photoelectric coupled circuit is connected with the output of described signaling conversion circuit, second input of described first photoelectric coupled circuit is for receiving a STO function triggering signal, the output of described first photoelectric coupled circuit is connected with the input of described first shaping circuit, and the output of described first shaping circuit is connected with the input of a described RC filter circuit;
Described signaling conversion circuit, for being converted to the second narrow pulse signal that described first photoelectric coupled circuit can identify by described first narrow pulse signal;
Described first photoelectric coupled circuit, for isolating described second narrow pulse signal and a described STO function triggering signal and compare process, obtains the first safe input signal;
Described first shaping circuit, for carrying out shaping to described first safe input signal, obtains the second safe input signal, and exports described second safe input signal;
A described RC filter circuit, for carrying out filtering to described second safe input signal, obtains the 3rd safe input signal, and exports described 3rd safe input signal.
Preferably, described signaling conversion circuit comprises: the 3rd isolation optocoupler, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 5th electric capacity, the first triode and the 3rd voltage stabilizing didoe;
Described first photoelectric coupled circuit comprises: the first resistance, the second resistance, the 3rd resistance, the first electric capacity, the second electric capacity and the first isolation optocoupler;
A described RC filter circuit comprises: the 12 resistance and the 6th electric capacity;
The first end of described 7th resistance is as the input of described signaling conversion circuit, second end of described 7th resistance is connected with the described 3rd second input of isolating optocoupler with the first end of described 8th resistance respectively, and the second end of described 8th resistance is connected with described 3rd first input end of isolating optocoupler with the first power supply respectively;
First output of described 3rd isolation optocoupler is connected with the first end of described tenth resistance with the collector electrode of described first triode respectively, second output of described 3rd isolation optocoupler is connected with the base stage of described first triode with the first end of described 5th electric capacity, the first end of described 9th resistance respectively, second end ground connection of described 5th electric capacity, second end ground connection of described 9th resistance, the grounded emitter of described first triode;
Second end of described tenth resistance is as the output of described signaling conversion circuit, the first end of described 11 resistance is connected with the second end of described tenth resistance, second end of described 11 resistance is connected with second source, the negative electrode of described 3rd voltage stabilizing didoe is connected with the second end of described tenth resistance, the plus earth of described 3rd voltage stabilizing didoe;
The first end of described first resistance is as the first input end of described first photoelectric coupled circuit, the second input that second end of described first resistance isolates optocoupler with second end and described first of described first electric capacity is respectively connected, and the first end of described first electric capacity is connected with the described first first input end of isolating optocoupler and as the second input of described first photoelectric coupled circuit;
First output of described first isolation optocoupler is connected with the first end of described 3rd resistance with the first end of described second resistance respectively, second end of described second resistance is connected with the first power supply, second end of described 3rd resistance is connected as the output of described first photoelectric coupled circuit with the first end of described second electric capacity respectively, second end ground connection of described second electric capacity, the second output head grounding of described first isolation optocoupler;
The first end of described 12 resistance is as the input of a described RC filter circuit, second end of described 12 resistance is connected with the first end of described 6th electric capacity and as the output of a described RC filter circuit, the second end ground connection of described 6th electric capacity.
Preferably, described first photoelectric coupled circuit also comprises:
First voltage stabilizing didoe, the anode of described first voltage stabilizing didoe is connected with the second end of described first resistance, and the second input that the negative electrode and described first of described first voltage stabilizing didoe isolates optocoupler is connected.
Preferably, described first isolation optocoupler also comprises: the first diode and the 4th diode;
The anode of described first diode is connected with the first end of described first electric capacity, and the negative electrode of described first diode is connected with the described first first input end of isolating optocoupler;
The negative electrode of described 4th diode is connected with the second end of described first electric capacity, and the anode of described 4th diode is connected with the anode of described first voltage stabilizing didoe.
Preferably, described first photoelectric coupled circuit also comprises:
Second diode and the 3rd diode;
The negative electrode of described second diode is connected with the first end of described first electric capacity, and the anode of described second diode is connected with the anode of described first voltage stabilizing didoe;
The anode of described 3rd diode is connected with the second end of described first resistance, and the negative electrode of described 3rd diode is connected with the described first first input end of isolating optocoupler.
Preferably, described STO control circuit also comprises:
Second photoelectric coupled circuit identical with described first photoelectric coupled circuit structure;
Second shaping circuit identical with described first shaping circuit structure;
The two RC filter circuit identical with a described RC filter circuit construction;
The first input end of described second photoelectric coupled circuit is connected with the output of described signaling conversion circuit, second input of described second photoelectric coupled circuit is for receiving a described STO function triggering signal, the output of described second photoelectric coupled circuit is connected with the input of described second shaping circuit, and the output of described second shaping circuit is connected with the input of described 2nd RC filter circuit;
Described second photoelectric coupled circuit, for isolating described second narrow pulse signal and a described STO function triggering signal and compare process, obtains the 4th safe input signal;
Described second shaping circuit, for carrying out shaping to described 4th safe input signal, obtains the 5th safe input signal, and exports described 5th safe input signal;
Described 2nd RC filter circuit, for carrying out filtering to described 5th safe input signal, obtains the 6th safe input signal, and exports described 6th safe input signal.
A kind of STO control system, comprises electrical equipment and the STO control circuit as described in above-mentioned any one;
Described electrical equipment comprises: control module, the first enable control circuit, the first tristate buffer and the first pull-up resistor group;
Described control module, for exporting the first narrow pulse signal to described STO control circuit, and export the 2nd STO function triggering signal to described first enable control circuit, and export PWM drive singal to described first tristate buffer, and receive the second safe input signal of described STO control circuit output, and whether STO control circuit breaks down according to described second safe input-signal judging;
Described first enable control circuit, for receiving the 3rd safe input signal of described STO control circuit output and described 2nd STO function triggering signal, and described 3rd safe input signal and described 2nd STO function triggering signal are carried out and computing, export corresponding first and enablely control signal to described first tristate buffer;
Described first tristate buffer, for when described first enable control signal is effective, output drive signal is to the drive circuit of described electrical equipment;
Described first pull-up resistor group is connected with the output of described first tristate buffer.
Preferably, described first enable control circuit comprises: the 9th diode, the tenth diode and the 26 resistance;
Described first pull-up resistor group comprises: the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance and the 19 resistance;
The first input end of described control module is connected with the output of the first shaping circuit of described STO control circuit, first output of described control module is connected with the input of the signaling conversion circuit of described STO control circuit, second output of described control module is connected with the negative electrode of described tenth diode, 3rd output of described control module is connected with the first input end of described first tristate buffer, 4th output of described control module is connected with the second input of described first tristate buffer, 5th output of described control module is connected with the 3rd input of described first tristate buffer, 6th output of described control module is connected with the four-input terminal of described first tristate buffer, 7th output of described control module is connected with the 5th input of described first tristate buffer, 8th output of described control module is connected with the 6th input of described first tristate buffer,
The negative electrode of the 9th diode is connected with the output of a RC filter circuit of described STO control circuit, the anode of described 9th diode is connected with the first Enable Pin of described first tristate buffer with the anode of described tenth diode, the first end of described 26 resistance respectively, and the second end of described 26 resistance is connected with the first power supply;
First output of described first tristate buffer, the second output, the 3rd output, the 4th output, the 5th output are all connected with the second input of described drive circuit with the 6th output;
The first end of described 14 resistance is connected with the first output of described first tristate buffer, the first end of described 15 resistance is connected with the second output of described first tristate buffer, the first end of described 16 resistance is connected with the 3rd output of described first tristate buffer, the first end of described 17 resistance is connected with the 4th output of described first tristate buffer, the first end of described 18 resistance is connected with the 5th output of described first tristate buffer, the first end of described 19 resistance is connected with the 6th output of described first tristate buffer,
Second end of described 14 resistance, the second end of described 15 resistance, the second end of described 16 resistance, the second end of described 17 resistance, the second end of described 18 resistance are all connected with described first power supply with the second end of described 19 resistance.
Preferably, also comprise: the second enable control circuit, the second tristate buffer and the second pull-up resistor group;
Described second enable control circuit, for receiving the 6th safe input signal of described STO control circuit output and described 2nd STO function triggering signal, and described 6th safe input signal and described 2nd STO function triggering signal are carried out and computing, export corresponding second and enablely control signal to described second tristate buffer;
Described second tristate buffer, for when described second enable control signal is effective, output drive signal is to the drive circuit of described electrical equipment;
Described second pull-up resistor group is connected with the output of described second tristate buffer.
Preferably, described second enable control circuit comprises: the 11 diode, the 12 diode and the 27 resistance;
Described second pull-up resistor group comprises: the 20 resistance, the 21 resistance, the 22 resistance, the 23 resistance, the 24 resistance and the 25 resistance;
The negative electrode of the 11 diode is connected with the output of described 2nd RC filter circuit, the anode of described 11 diode is connected with the first Enable Pin of described second tristate buffer with the second Enable Pin of described first tristate buffer respectively with the first end of the anode of described 12 diode, described 27 resistance respectively, and the second end of described 27 resistance is connected with described first power supply;
Second Enable Pin of described second tristate buffer is connected with the anode of described 9th diode;
First output of described first tristate buffer is connected with the first input end of described second tristate buffer, second output of described first tristate buffer is connected with the second input of described second tristate buffer, 3rd output of described first tristate buffer is connected with the 3rd input of described second tristate buffer, 4th output of described first tristate buffer is connected with the four-input terminal of described second tristate buffer, 5th output of described first tristate buffer is connected with the 5th input of described second tristate buffer, 6th output of described first tristate buffer is connected with the 6th input of described second tristate buffer,
First output of described second tristate buffer, the second output, the 3rd output, the 4th output, the 5th output are all connected with the second input of described drive circuit with the 6th output;
The first end of described 20 resistance is connected with the first output of described second tristate buffer, the first end of described 21 resistance is connected with the second output of described second tristate buffer, the first end of described 22 resistance is connected with the 3rd output of described second tristate buffer, the first end of described 23 resistance is connected with the 4th output of described second tristate buffer, the first end of described 24 resistance with tell the second tristate buffer the 5th output be connected, the first end of described 25 resistance is connected with the 6th output of described second tristate buffer,
Second end of described 20 resistance, the second end of described 21 resistance, the second end of described 22 resistance, described second end of the 23 resistance, the second end of the 24 resistance are all connected with described first power supply with the second end of described 25 resistance.
Compared with prior art, the beneficial effect of the application is:
In this application, when the STO function of adjustable speed electrical equipment is not triggered, one STO function triggering signal is high level signal, first photoelectric coupled circuit receives a STO function triggering signal of the second narrow pulse signal and high level, first photoelectric coupled circuit conducting, export the second safe input signal, second safe input signal is through the first shaping circuit, first shaping circuit exports the control module of the second more regular safe input signal to adjustable speed electrical equipment, if the control module of adjustable speed electrical equipment detects the narrow pulse signal in the second safe input signal, STO control circuit fault-free is described, if control module can't detect the narrow pulse signal in the second safe input signal, illustrate that STO control circuit exists fault, achieve the self-inspection to STO control circuit, narrow pulse signal in the safe input signal of one RC filter circuit filtering second, output low level signal is to the enable control circuit of adjustable speed electrical equipment, make the effective enable control signal of enable control circuit output low level of adjustable speed electrical equipment, to make the IGBT of adjustable speed electrical equipment normally work, do not affect adjustable speed electrical equipment and normally work.
When the STO function of adjustable speed electrical equipment is triggered, the unsettled no signal input of second input of the first photoelectric coupled circuit, namely a STO function triggering signal disconnects, first photoelectric coupled circuit only receives the second narrow pulse signal, first photoelectric coupled circuit not conducting, first photoelectric coupled circuit exports the high level signal continued, the high level signal that first photoelectric coupled circuit exports exports the control module of adjustable speed electrical equipment to after the first shaping circuit, the control module of adjustable speed electrical equipment can't detect narrow pulse signal, the 3rd safe input signal that one RC filter circuit exports also is high level signal, the enable control circuit of adjustable speed electrical equipment is made to export the enable control signal of high level, to control the IGBT not conducting of adjustable speed electrical equipment, reach STO function.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present application, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of operation principle schematic diagram of the STO control circuit that the application provides;
Fig. 2 is a kind of electronic schematic diagram of the STO control circuit that the application provides;
Fig. 3 is the another kind of electronic schematic diagram of the STO control circuit that the application provides;
Fig. 4 is another electronic schematic diagram of the STO control circuit that the application provides;
Fig. 5 is another electronic schematic diagram of the STO control circuit that the application provides;
Fig. 6 is another electronic schematic diagram of the STO control circuit that the application provides;
Fig. 7 is the another kind of operation principle schematic diagram of the STO control circuit that the application provides;
Fig. 8 is another electronic schematic diagram of the STO control circuit that the application provides;
Fig. 9 is another electronic schematic diagram of the STO control circuit that the application provides;
Figure 10 is a kind of electronic schematic diagram of the STO control system that the application provides;
Figure 11 is the another kind of electronic schematic diagram of the STO control system that the application provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Embodiment one
Refer to Fig. 1, it illustrates a kind of logical construction schematic diagram of the STO control circuit that the application provides, STO control circuit comprises: signaling conversion circuit 11, first photoelectric coupled circuit 12, first shaping circuit 13 and a RC filter circuit 14.
The input of described signaling conversion circuit 11, for receiving the first narrow pulse signal.
In the present embodiment, the first narrow pulse signal is for realizing the self-inspection of STO control circuit.
In the present embodiment, the first narrow pulse signal specifically can be exported by the control module of electrical equipment corresponding to STO control circuit.
The first input end of described first photoelectric coupled circuit 12 is connected with the output of described signaling conversion circuit 11, second input of described first photoelectric coupled circuit 12 is for receiving a STO function triggering signal, the output of described first photoelectric coupled circuit 12 is connected with the input of described first shaping circuit 13, and the output of described first shaping circuit 13 is connected with the input of a described RC filter circuit 14.
Described signaling conversion circuit 11, for being converted to the second narrow pulse signal that described first photoelectric coupled circuit 12 can identify by described first narrow pulse signal.
Described first photoelectric coupled circuit 12, for isolating described second narrow pulse signal and a described STO function triggering signal and compare process, obtains the first safe input signal.
Described first shaping circuit 13, for carrying out shaping to described first safe input signal, obtains the second safe input signal, and exports described second safe input signal.
In the present embodiment, when a STO function triggering signal is high level signal, whether the control module of the adjustable speed electrical equipment that STO control circuit is corresponding is by existing narrow pulse signal in the safe input signal of detection second, judge whether STO control circuit breaks down, if detect in the second safe input signal to there is narrow pulse signal, illustrate that STO control circuit does not break down, if detect in the second safe input signal to there is not narrow pulse signal, illustrate that STO control circuit breaks down.
A described RC filter circuit 14, for carrying out filtering to described second safe input signal, obtains the 3rd safe input signal, and exports described 3rd safe input signal.
One RC filter circuit 14, for the narrow pulse signal in the safe input signal of filtering second, obtains the 3rd safe input signal, and exports described 3rd safe input signal.
Refer to Fig. 1, the operation principle of STO control circuit is described, specific as follows:
Signaling conversion circuit 11 receives the first narrow pulse signal Self_Ts (as 1KHz, duty ratio is 5 ~ 15%), first narrow pulse signal Self_Ts is converted to the second narrow pulse signal Self_Test, second narrow pulse signal Self_Test inputs to the first photoelectric coupled circuit 12, first photoelectric coupled circuit 12 is isolated a STO function triggering signal STO_PW and the second narrow pulse signal Self_Test and compares process, obtain the first safe input signal HIGH_SITE, first safe input signal HIGH_SITE obtains the second safe input signal STO1 through the first shaping circuit 13, first shaping circuit 13 exports the second safe input signal STO1, one RC filter circuit 14 carries out filtering to the second safe input signal STO1, export the 3rd safe input signal STO_HIGH_CTR.
When the STO function of adjustable speed electrical equipment is not triggered, a STO function triggering signal STO_PW is always high level signal, and the second narrow pulse signal Self_Test is narrow pulse signal.When first photoelectric coupled circuit 12 receives a STO function triggering signal STO_PW of low level second narrow pulse signal Self_Test and high level, first photoelectric coupled circuit 12 conducting, the the first safe input signal HIGH_SITE exported is low level, and low level first safe input signal HIGH_SITE exports the control module of the second more regular safe input signal STO1 to adjustable speed electrical equipment after the first shaping circuit 13 shaping; When the first photoelectric coupled circuit 12 receives the second narrow pulse signal Self_Test of a high level and STO function triggering signal STO_PW of high level, first photoelectric coupled circuit 12 not conducting, first photoelectric coupled circuit 12 exports the first safe input signal HIGH_SITE of high level, exports the safe input signal STO1 of more regular high level second after shaping; Therefore, when adjustable speed electrical equipment normally runs, when namely STO function is not triggered, a STO function triggering signal STO_PW is always high level signal, and the second safe input signal STO1 and the first narrow pulse signal Self_Ts is narrow pulse signal; One RC filter circuit 14 is by the 3rd safe input signal STO_HIGH_CTR of output low level after the second safe input signal STO1 filtering.
When the STO function of adjustable speed electrical equipment is triggered, the unsettled no signal input of second input of described first photoelectric coupled circuit 12, namely a STO function triggering signal STO_PW disconnects, first photoelectric coupled circuit 12 only receives the second narrow pulse signal Self_Test, first photoelectric coupled circuit 12 not conducting, first photoelectric coupled circuit 12 exports the high level signal continued, the high level signal that first photoelectric coupled circuit 12 exports exports the control module of adjustable speed electrical equipment to after the first shaping circuit 13, the control module of adjustable speed electrical equipment only can detect lasting high level signal and can't detect narrow pulse signal, the 3rd safe input signal STO_HIGH_CTR that one RC filter circuit 14 exports also is high level signal, the enable control circuit of adjustable speed electrical equipment is made to export the enable control signal of high level, to control the IGBT not conducting of adjustable speed electrical equipment, reach STO function.
When the control module of adjustable speed electrical equipment can't detect the narrow pulse signal in the second safe input signal STO1, illustrate that circuit devcie in STO control circuit (i.e. the first photoelectric coupled circuit 12 and the first shaping circuit 13) lost efficacy or a STO function triggering signal STO_PW is low level invalid signals, control module prompting STO control circuit breaks down, when determining that a STO function triggering signal STO_PW is high level signal, determine that circuit devcie in STO control circuit (i.e. the first photoelectric coupled circuit 12 and the first shaping circuit 13) lost efficacy; When the control module of adjustable speed electrical equipment detects the narrow pulse signal in the second safe input signal STO1, STO control circuit fault-free is described, achieves the self-inspection to STO control circuit.Narrow pulse signal in the safe input signal STO1 of one RC filter circuit 14 filtering second, output low level signal is to the enable control circuit of adjustable speed electrical equipment, make the effective enable control signal of enable control circuit output low level of adjustable speed electrical equipment, to make the IGBT of adjustable speed electrical equipment normally work, do not affect adjustable speed electrical equipment and normally work.
In this application, when the STO function of adjustable speed electrical equipment is not triggered, one STO function triggering signal is high level signal, first photoelectric coupled circuit 12 receives a STO function triggering signal of the second narrow pulse signal and high level, first photoelectric coupled circuit 12 conducting, export the second safe input signal, second safe input signal is through the first shaping circuit 13, first shaping circuit 13 exports the control module of the second more regular safe input signal to adjustable speed electrical equipment, if the control module of adjustable speed electrical equipment detects the narrow pulse signal in the second safe input signal, STO control circuit fault-free is described, if control module can't detect the narrow pulse signal in the second safe input signal, illustrate that STO control circuit exists fault, achieve the self-inspection to STO control circuit, narrow pulse signal in the safe input signal of one RC filter circuit 14 filtering second, output low level signal is to the enable control circuit of adjustable speed electrical equipment, make the effective enable control signal of enable control circuit output low level of adjustable speed electrical equipment, to make the IGBT of adjustable speed electrical equipment normally work, do not affect adjustable speed electrical equipment and normally work.
When the STO function of adjustable speed electrical equipment is triggered demand, the unsettled no signal input of second input of the first photoelectric coupled circuit 12, namely a STO function triggering signal disconnects, first photoelectric coupled circuit 12 only receives the second narrow pulse signal, first photoelectric coupled circuit 12 not conducting, first photoelectric coupled circuit 12 exports the high level signal continued, the high level signal that first photoelectric coupled circuit 12 exports exports the control module of adjustable speed electrical equipment to after the first shaping circuit 13, the control module of adjustable speed electrical equipment can't detect narrow pulse signal, the 3rd safe input signal that one RC filter circuit 14 exports also is high level signal, the enable control circuit of adjustable speed electrical equipment is made to export the enable control signal of high level, to control the IGBT not conducting of adjustable speed electrical equipment, reach STO function.
Refer to Fig. 2, in the present embodiment, signaling conversion circuit 11 can comprise: the 3rd isolation optocoupler PC2, the 7th resistance Rt2, the 8th resistance RT1, the 9th resistance Rt3, the tenth resistance Rt4, the 11 resistance Rt5, the 5th electric capacity Ct1, the first triode Q1 and the 3rd voltage stabilizing didoe Z2.
First photoelectric coupled circuit 12 comprises: the first resistance R1, the second resistance R2, the 3rd resistance R3, the first electric capacity C1, the second electric capacity C2 and first isolation optocoupler PC1.
In the present embodiment, a RC filter circuit 14 comprises: the 12 resistance R12 and the 6th electric capacity C6.
The first end of described 7th resistance Rt2 is as the input of described signaling conversion circuit 11, second end of described 7th resistance Rt2 is connected with the described 3rd second input of isolating optocoupler PC2 with the first end of described 8th resistance RT1 respectively, and second end of described 8th resistance RT1 is connected with described 3rd first input end of isolating optocoupler PC2 with the first power supply respectively;
First output of described 3rd isolation optocoupler PC2 is connected with the first end of described tenth resistance Rt4 with the collector electrode of described first triode Q1 respectively, second output of described 3rd isolation optocoupler PC2 is connected with the base stage of described first triode Q1 with the first end of described 5th electric capacity Ct1, the first end of described 9th resistance Rt3 respectively, the second end ground connection of described 5th electric capacity Ct1, the second end ground connection of described 9th resistance Rt3, the grounded emitter of described first triode Q1;
Second end of described tenth resistance Rt4 is as the output of described signaling conversion circuit 11, the first end of described 11 resistance Rt5 is connected with second end of described tenth resistance Rt4, second end of described 11 resistance Rt5 is connected with second source, the negative electrode of described 3rd voltage stabilizing didoe Z2 is connected with second end of described tenth resistance Rt4, the plus earth of described 3rd voltage stabilizing didoe Z2.
The first end of described first resistance R1 is as the first input end of described first photoelectric coupled circuit 12, the second input that second end of described first resistance R1 isolates optocoupler PC1 with second end and described first of described first electric capacity C1 is respectively connected, and the first end of described first electric capacity is connected with the described first first input end of isolating optocoupler PC1 and as the second input of described first photoelectric coupled circuit 12.
First output of described first isolation optocoupler PC1 is connected with the first end of described 3rd resistance R3 with the first end of described second resistance R2 respectively, second end of described second resistance R2 is connected with the first power supply, second end of described 3rd resistance R3 is connected as the output of described first photoelectric coupled circuit 12 with the first end of described second electric capacity C2, the second end ground connection of described second electric capacity C2, second output head grounding of described first isolation optocoupler PC1.
The first end of described 12 resistance R12 is as the input of a described RC filter circuit 14, second end of described 12 resistance R12 is connected with the first end of described 6th electric capacity C6 and as the output of a described RC filter circuit 14, the second end ground connection of described 6th electric capacity C6.
In the present embodiment, the first shaping circuit 13 specifically can comprise: the first not gate U1-A and the second not gate U1-C, as shown in Figure 3.
The input of the first not gate U1-A is as the input of the first shaping circuit 13, and the output of the first not gate U1-A is connected with the input of the second not gate U1-C, and the output of the second not gate U1-C is as the output of the first shaping circuit 13.
In the present embodiment, the first photoelectric coupled circuit 12 shown in Fig. 2 can also comprise: the first voltage stabilizing didoe Z1, the anode of described first voltage stabilizing didoe Z1 is connected with the second end of described first resistance, the second input that the negative electrode and described first of described first voltage stabilizing didoe Z1 isolates optocoupler PC1 is connected, as shown in Figure 4.
In the present embodiment, increase by the first voltage stabilizing didoe Z1, improve the antijamming capability of the first photoelectric coupled circuit 12.
In the present embodiment, the first photoelectric coupled circuit 12 shown in Fig. 4 can also comprise: the first diode D1 and the 4th diode D4, as shown in Figure 5.
The anode of described first diode D1 is connected with the first end of described first electric capacity C1, and the negative electrode of described first diode D1 is connected with the described first first input end of isolating optocoupler PC1.
The negative electrode of described 4th diode D4 is connected with second end of described first electric capacity C1, and the anode of described 4th diode D4 is connected with the anode of described first voltage stabilizing didoe Z1.
In aforementioned and the present embodiment, the first input end of the first isolation optocoupler PC1 and the second input need respectively with a STO function triggering signal STO_PW and the second narrow pulse signal Self_Test is corresponding is connected, can not reversal connection; Increase the fault that the first diode D1 and the 4th diode D4 can prevent the first input end of the first isolation optocoupler PC1 and the second input reversal connection from causing.
In the present embodiment, the first photoelectric coupled circuit 12 shown in Fig. 5 can also comprise: the second diode D2 and the 3rd diode D3, as shown in Figure 6.
The negative electrode of described second diode D2 is connected with the first end of described first electric capacity C1, and the anode of described second diode D2 is connected with the anode of described first voltage stabilizing didoe Z1.
The anode of described 3rd diode D3 is connected with second end of described first resistance R1, and the negative electrode of described 3rd diode D3 is connected with the described first first input end of isolating optocoupler PC1.
In the present embodiment, the basis of the first photoelectric coupled circuit 12 shown in Fig. 6 increases the second diode D2 and the 3rd diode D3, make the mode of connection of the first input end of the first isolation optocoupler PC1 and the second input no longer restricted, no matter how first input end and the second input be connected with a STO function triggering signal STO_PW of outside and the second narrow pulse signal Self_Test, all can ensure that the first isolation optocoupler PC1 normally works, improve the fail safe of circuit.
Embodiment two
In the present embodiment, the basis of the STO control circuit shown in embodiment one expands another STO control circuit, refer to Fig. 7, the basis of the STO control circuit shown in embodiment one also comprises: second photoelectric coupled circuit 15 identical with described first photoelectric coupled circuit 12 structure; Second shaping circuit 16 identical with described first shaping circuit 13 structure; The two RC filter circuit 17 identical with described RC filter circuit 14 structure.
The first input end of described second photoelectric coupled circuit 15 is connected with the output of described signaling conversion circuit 11, second input of described second photoelectric coupled circuit 15 is for receiving a described STO function triggering signal, the output of described second photoelectric coupled circuit 15 is connected with the input of described second shaping circuit 16, and the output of described second shaping circuit 16 is connected with the input of described 2nd RC filter circuit 17.
Described second photoelectric coupled circuit 15, for isolating described second narrow pulse signal and a described STO function triggering signal and compare process, obtains the 4th safe input signal.
Described second shaping circuit 16, for carrying out shaping to described 4th safe input signal, obtains the 5th safe input signal, and exports described 5th safe input signal;
Described 2nd RC filter circuit 17, for carrying out filtering to described 5th safe input signal, obtains the 6th safe input signal, and exports described 6th safe input signal.
In the present embodiment, the second photoelectric coupled circuit 15, second shaping circuit 16 is identical with the operation principle of the STO control circuit shown in embodiment one with the operation principle of the branch road that the 2nd RC filter circuit 17, signaling conversion circuit 11 are formed, and does not repeat them here.Concrete operation principle schematic diagram can see Fig. 7.
In the present embodiment, the second photoelectric coupled circuit 15 specifically comprises: the 4th resistance Rr1, the 5th resistance Rr2, the 6th resistance Rr3, the 3rd electric capacity Cc1, the 4th electric capacity Cc2 and second isolation optocoupler PCc1.
2nd RC filter circuit 17 specifically comprises: the 13 resistance R13 and the 7th electric capacity C7.
The first end of described 4th resistance Rr1 is as the first input end of the second photoelectric coupled circuit 15, the second input that second end of described 4th resistance Rr1 isolates optocoupler PCc1 with second end and described second of described 3rd electric capacity Cc1 is respectively connected, and the first end of described 3rd electric capacity Cc1 is connected with the described second first input end of isolating optocoupler PCc1 and as the second input of described second photoelectric coupled circuit 15.
First output of described second isolation optocoupler PCc1 is connected with the first end of described 6th resistance Rr3 with the first end of described 5th resistance Rr2 respectively, second end of described 5th resistance Rr2 is connected with described first power supply, second end of described 6th resistance Rr3 is connected with the first end of described 3rd electric capacity Cc1 and the output of described second photoelectric coupled circuit 15, the second end ground connection of described 4th electric capacity Cc2, second output head grounding of described second isolation optocoupler PCc1.
The first end of described 13 resistance R13 is as the input of described 2nd RC filter circuit 17, second end of described 13 resistance R13 is connected with the first end of described 7th electric capacity C7 and as the output of described 2nd RC filter circuit 17, the second end ground connection of described 7th electric capacity C7.
In the present embodiment, the two-way hardware redundancy design of the one article of branch road adopting one article of branch road of the first photoelectric coupled circuit 12, first shaping circuit 13, RC filter circuit 14 composition and the second photoelectric coupled circuit 15, second shaping circuit 16, the 2nd RC filter circuit 17 to form, after a branch road breaks down wherein, another branch road can be used to carry out STO control, enhance the reliability that STO control circuit controls.
In the present embodiment, above-mentioned second photoelectric coupled circuit 15 can also comprise: the second voltage stabilizing didoe Zz1, the anode of described second voltage stabilizing didoe Zz1 is connected with second end of described 4th resistance Rr1, and the second input that the negative electrode and described second of described second voltage stabilizing didoe Zz1 isolates optocoupler PCc1 is connected.
In the present embodiment, above-mentioned second photoelectric coupled circuit 15 can also comprise: the 5th diode Dd1 and the 8th diode Dd4.
The anode of described 5th diode Dd1 is connected with the first end of described 3rd electric capacity Cc1, and the negative electrode of described 5th diode Dd1 is connected with the described second first input end of isolating optocoupler PCc1.
The negative electrode of described 8th diode Dd4 is connected with second end of described 3rd electric capacity Cc1, and the anode of described 8th diode Dd4 is connected with the anode of described second voltage stabilizing didoe Zz1.
In aforementioned and the present embodiment, the first input end of the second isolation optocoupler PCc1 and the second input need respectively with a STO function triggering signal STO_PW and the second narrow pulse signal Self_Test is corresponding is connected, can not reversal connection; Increase the fault that the 5th diode Dd1 and the 8th diode Dd4 can prevent the first input end of the second isolation optocoupler PCc1 and the second input reversal connection from causing.
In the present embodiment, above-mentioned second photoelectric coupled circuit 15 can also comprise: the 6th diode Dd2 and the 7th diode Dd3, as shown in Figure 8.
The negative electrode of described 6th diode Dd2 is connected with the first end of described 3rd electric capacity Cc1, and the anode of described 6th diode Dd2 is connected with the anode of described second voltage stabilizing didoe Zz1.
The anode of described 7th diode Dd3 is connected with second end of described 4th resistance Rr1, and the negative electrode of described 7th diode Dd3 is connected with the described second first input end of isolating optocoupler PCc1.
In the present embodiment, the basis of the second photoelectric coupled circuit 15 including increase the 5th diode Dd1 and the 8th diode Dd4 increases the 6th diode Dd2 and the 7th diode Dd3, make the mode of connection of the first input end of the second isolation optocoupler PCc1 and the second input no longer restricted, no matter how first input end and the second input be connected with a STO function triggering signal STO_PW of outside and the second narrow pulse signal Self_Test, all can ensure that the second isolation optocoupler PCc1 normally works, improve the fail safe of circuit.
Second shaping circuit 16 specifically comprises: the 3rd not gate U1-B and described 4th not gate U1-D, refers to Fig. 9.
The input of the 3rd not gate U1-B is as the input of the second shaping circuit 16, and the output end of the 3rd not gate U1-B is connected with the input of the 4th not gate U1-D, and the output of the 4th not gate U1-D is as the output of the second shaping circuit 16.
Embodiment three
In the present embodiment, show a kind of STO control system, refer to Figure 10, comprise electrical equipment 151 and STO control circuit 152.
The composition of STO control circuit 152 and electrical principle refer to the STO control circuit shown in embodiment one, do not repeat them here.
It should be noted that, STO control circuit 152 realizes the input of a STO function triggering signal STO_PW by emergency stop switch SW1.Emergency stop switch SW1 is connected with the second input of the first photoelectric coupled circuit 12.Wherein, emergency stop switch SW1 is normally closed switch, disconnects to trigger STO function when pressing.
When the STO function of STO control circuit 152 is not triggered, emergency stop switch SW1 is in closure state, and the STO function triggering signal STO_PW that the second input of the first photoelectric coupled circuit 12 receives is always high level signal; Disconnect when emergency stop switch SW1 is pressed, when triggering STO function, the unsettled no signal input of the second input of the first photoelectric coupled circuit 12, namely a STO function triggering signal STO_PW disconnects.
Electrical equipment 151 comprises: control module 1511, first enable control circuit 1512, first tristate buffer U2 and the first pull-up resistor group.
Described control module 1511, for exporting the first narrow pulse signal to described STO control circuit 152, and export the 2nd STO function triggering signal to described first enable control circuit 1512, and export PWM drive singal to described first tristate buffer U2, and receive the second safe input signal of described STO control circuit 152 output, and whether STO control circuit 152 breaks down according to described second safe input-signal judging.
Described first enable control circuit 1512, for receiving the 3rd safe input signal of described STO control circuit 152 output and described 2nd STO function triggering signal, and described 3rd safe input signal and described 2nd STO function triggering signal are carried out and computing, export corresponding first and enablely control signal to described first tristate buffer U2.
Described first tristate buffer U2, for when described first enable control signal is effective, output drive signal is to the drive circuit 1516 of described electrical equipment.
Described first pull-up resistor group is connected with the output of described first tristate buffer U2.
In the present embodiment, described first enable control circuit 1512 comprises: the 9th diode D9, the tenth diode D10 and the 26 resistance R26.
Described first pull-up resistor group comprises: the 14 resistance R14, the 15 resistance R15, the 16 resistance R16, the 17 resistance R17, the 18 resistance R18 and the 19 resistance R19.
The first input end of described control module 1511 is connected with the output of the first shaping circuit 13 of described STO control circuit, first output of described control module 1511 is connected with the input of the signaling conversion circuit 11 of described STO control circuit, second output of described control module 1511 is connected with the negative electrode of described tenth diode D10,3rd output of described control module 1511 is connected with the first input end of described first tristate buffer U2,4th output of described control module 1511 is connected with second input of described first tristate buffer U2,5th output of described control module 1511 is connected with the 3rd input of described first tristate buffer U2,6th output of described control module 1511 is connected with the four-input terminal of described first tristate buffer U2,7th output of described control module 1511 is connected with the 5th input of described first tristate buffer U2,8th output of described control module 1511 is connected with the 6th input of described first tristate buffer U2,
The negative electrode of the 9th diode D9 is connected with the output of a RC filter circuit 14 of described STO control circuit, the anode of described 9th diode D9 is connected with first Enable Pin of described first tristate buffer U2 with the anode of described tenth diode D10, the first end of described 26 resistance R26 respectively, and second end of described 26 resistance R26 is connected with the first power supply;
First output of described first tristate buffer U2, the second output, the 3rd output, the 4th output, the 5th output are all connected with the input of described drive circuit 1516 with the 6th output;
The first end of described 14 resistance R14 is connected with first output of described first tristate buffer U2, the first end of described 15 resistance R15 is connected with second output of described first tristate buffer U2, the first end of described 16 resistance R16 is connected with the 3rd output of described first tristate buffer U2, the first end of described 17 resistance R17 is connected with the 4th output of described first tristate buffer U2, the first end of described 18 resistance R18 is connected with the 5th output of described first tristate buffer U2, the first end of described 19 resistance R19 is connected with the 6th output of described first tristate buffer U2,
Second end of described 14 resistance R14, second end of described 15 resistance R15, second end of described 16 resistance R16, second end of described 17 resistance R17, second end of described 18 resistance R18 are all connected with described first power supply with second end of described 19 resistance R19.
In the present embodiment, first Enable Pin of the first tristate buffer U2 is connected with second Enable Pin of the first tristate buffer U2.
In the present embodiment, refer to Figure 10, the operation principle of STO control system is described, wherein, the operation principle of STO control circuit 152 refers to STO control circuit 152 operation principle shown in embodiment one, and do not repeat them here, the operation principle of STO control system is specific as follows:
Control module 1511 exports the first narrow pulse signal Self_Ts to STO control circuit 152, STO control circuit 152 exports the second safe input signal STO1 to control module 1511, and export the 2nd STO function triggering signal STO_EN that the 3rd safe input signal STO_HIGH_CTR to the first safe input signal STO_HIGH_CTR of enable control circuit the 1512, three and control module 1511 export obtain the first enable control signal HIGH_DRV_EN for controlling the enable operating state of the first tristate buffer U2 after the first enable control circuit 1512 carries out logic and operation.
Control module 1511 exports a PWM drive singal EPWM1A, the 2nd PWM drive singal EPWM2A of electrical equipment breaker in middle pipe, the 3rd PWM drive singal EPWM3A, the 4th PWM drive singal EPWM1B, the 5th PWM drive singal EPWM2B and the 6th PWM drive singal EPWM3B to the first tristate buffer U2, wherein the Enable Pin of the first tristate buffer U2 is Low level effective, in running order, quit work when Enable Pin is high level.
When not using STO control circuit 152, the 2nd STO function triggering signal STO_EN=0 that control module 1511 exports, the level of the 3rd safe input signal STO_HIGH_CTR no matter STO control circuit 152 exports is high or low, the first enable control signal HIGH_DRV_EN that first enable control circuit 1512 exports is always low level, first enable control signal HIGH_DRV_EN controls the first tristate buffer U2 and normally works, export the first drive singal U+, second drive singal V+, 3rd drive singal W+, four-wheel drive signal U-, 5th drive singal V-and the 6th drive singal W-is to drive circuit 1516, drive circuit 1516 is respectively according to the first drive singal U+, second drive singal V+, 3rd drive singal W+, four-wheel drive signal U-, 5th drive singal V-and the 6th drive singal W-drives corresponding IGBT work in the three-phase full-bridge inverting circuit in electrical equipment.
When needing when there being STO demand to use STO control circuit 152, the STO_EN=1 that control module 1511 exports, the first enable control signal HIGH_DRV_EN that first enable control circuit 1512 exports is relevant with the level height of the STO control circuit 152 exports the 3rd safe input signal STO_HIGH_CTR, when the 3rd safe input signal STO_HIGH_CTR is low level, the first enable control signal HIGH_DRV_EN is low level, and when the 3rd safe input signal STO_HIGH_CTR is high level, the first enable control signal HIGH_DRV_EN is high level.And first to ensure that STO control circuit 152 can normally work, therefore need to judge whether STO control circuit 152 breaks down.When judging whether STO control circuit 152 breaks down, ensure that emergency stop switch SW1 is in closure state, the first narrow pulse signal Self_Ts to STO control circuit 152 is exported by control module 1511, control module 1511 is when the narrow pulse signal in the second safe input signal STO1 being detected, STO control circuit 152 fault-free is described, can normally uses; Control module 1511, when can't detect the narrow pulse signal in the second safe input signal STO1, illustrates that STO control circuit 152 breaks down, and control module 1511 points out STO control circuit 152 to break down, and fixes a breakdown in time to make staff.
When detecting STO control circuit 152 fault-free, in order to trigger STO function, emergency stop switch SW1 is disconnected, first photoelectric coupled circuit 12 not conducting, first photoelectric coupled circuit 12 exports the high level signal continued, 3rd safe input signal STO_HIGH_CTR is high level, 3rd safe input signal STO_HIGH_CTR and STO_EN synthesizes, obtain the first enable control signal HIGH_DRV_EN of high level, thus cut-off the first tristate buffer U2, to control a PWM drive singal EPWM1A, 2nd PWM drive singal EPWM2A, 3rd PWM drive singal EPWM3A, 4th PWM drive singal EPWM1B, 5th PWM drive singal EPWM2B and the 6th PWM drive singal EPWM3B cannot export thus realize STO function.
When detecting STO control circuit 152 fault-free, and when not triggering STO function, emergency stop switch SW1 is closure state, the 3rd safe input signal STO_HIGH_CTR that STO control circuit 152 exports is low level, first enable control signal HIGH_DRV_EN is also low level, and the first tristate buffer U2 normally works.
Embodiment four
In the present embodiment, STO control system shown in embodiment three expands another STO control system, refer to Figure 11, the basis of the STO control system shown in Figure 10 can also comprise: the second enable control circuit 1513, second tristate buffer U3 and the second pull-up resistor group.
Described second enable control circuit 1513, for receiving the 6th safe input signal of described STO control circuit output and described 2nd STO function triggering signal, and described 6th safe input signal and described 2nd STO function triggering signal are carried out and computing, export corresponding second and enablely control signal to described second tristate buffer U3;
Described second tristate buffer U3, for when described second enable control signal is effective, output drive signal is to the drive circuit 1516 of described electrical equipment;
Described second pull-up resistor group is connected with the output of described second tristate buffer U3.
Described second enable control circuit 1513 comprises: the 11 diode D11, the 12 diode D12 and the 27 resistance R27.
Described second pull-up resistor group comprises: the 20 resistance R20, the 21 resistance R21, the 22 resistance R22, the 23 resistance R23, the 24 resistance R24 and the 25 resistance R25.
The negative electrode of the 11 diode D11 is connected with the output of described 2nd RC filter circuit 17, the anode of described 11 diode D11 is connected with first Enable Pin of described second tristate buffer U3 with the second Enable Pin of described first tristate buffer respectively with the first end of the anode of described 12 diode D12, described 27 resistance R27 respectively, and second end of described 27 resistance R27 is connected with described first power supply;
Second Enable Pin of described second tristate buffer U3 is connected with the anode of described 9th diode;
First output of described first tristate buffer U2 is connected with the first input end of described second tristate buffer U3, second output of described first tristate buffer U2 is connected with second input of described second tristate buffer U3, 3rd output of described first tristate buffer U2 is connected with the 3rd input of described second tristate buffer U3, 4th output of described first tristate buffer U2 is connected with the four-input terminal of described second tristate buffer U3, 5th output of described first tristate buffer U2 is connected with the 5th input of described second tristate buffer U3, 6th output of described first tristate buffer U2 is connected with the 6th input of described second tristate buffer U3,
First output of described second tristate buffer U3, the second output, the 3rd output, the 4th output, the 5th output are all connected with the input of described drive circuit 1516 with the 6th output;
The first end of described 20 resistance R20 is connected with first output of described second tristate buffer U3, the first end of described 21 resistance R21 is connected with second output of described second tristate buffer U3, the first end of described 22 resistance R22 is connected with the 3rd output of described second tristate buffer U3, the first end of described 23 resistance R23 is connected with the 4th output of described second tristate buffer U3, the first end of described 24 resistance R24 with tell the second tristate buffer U3 the 5th output be connected, the first end of described 25 resistance R25 is connected with the 6th output of described second tristate buffer U3,
Second end of described 20 resistance R20, second end of described 21 resistance R21, second end of described 22 resistance R22, described second end of the 23 resistance R23, second end of the 24 resistance R24 are all connected with described first power supply with second end of described 25 resistance R25.
In the present embodiment, refer to Figure 11, the operation principle of STO control system is described, wherein, the operation principle of STO control circuit 152 refers to STO control circuit 152 operation principle shown in embodiment two, and do not repeat them here, the operation principle of STO control system is specific as follows:
Control module 1511 exports the first narrow pulse signal Self_Ts to STO control circuit 152, STO control circuit 152 exports the second safe input signal STO1 and the 5th safe input signal STO2 to control module 1511, and export the enable control circuit 1512 of the 3rd safe input signal STO_HIGH_CTR to the first, export the enable control circuit 1513 of the 6th safe input signal STO_LOW_CTR to the second, the 2nd STO function triggering signal STO_EN that 3rd safe input signal STO_HIGH_CTR and control module 1511 export obtains the first enable control signal HIGH_DRV_EN after the first enable control circuit 1512 carries out logic and operation, the 2nd STO function triggering signal STO_EN that 6th safe input signal STO_LOW_CTR and control module 1511 export obtains the second enable control signal LOW_DRV_EN after the second enable control circuit 1513 carries out logic and operation.
Control module 1511 exports a PWM drive singal EPWM1A, the 2nd PWM drive singal EPWM2A, the 3rd PWM drive singal EPWM3A, the 4th PWM drive singal EPWM1B, the 5th PWM drive singal EPWM2B and the 6th PWM drive singal EPWM3B to the first tristate buffer U2, wherein the Enable Pin of the first tristate buffer U2 is Low level effective, in running order, quit work when Enable Pin is high level.
When not using STO control circuit 152, the 2nd STO function triggering signal STO_EN=0 that control module 1511 exports, the level of the 3rd safe input signal STO_HIGH_CTR no matter STO control circuit 152 exports is high or low, the first enable control signal HIGH_DRV_EN that first enable control circuit 1512 exports is always low level, the second enable control signal LOW_DRV_EN that second enable control circuit 1513 exports is always low level, first enable control signal HIGH_DRV_EN and the second enable control signal LOW_DRV_EN controls the first tristate buffer U2 and the second tristate buffer U3 by interleaved mode, first tristate buffer U2 and the second tristate buffer U3 can normally be worked, second tristate buffer U3 exports the first drive singal U+, second drive singal V+, 3rd drive singal W+, four-wheel drive signal U-, 5th drive singal V-and the 6th drive singal W-is to drive circuit 1516, drive circuit 1516 is respectively according to the first drive singal U+, second drive singal V+, 3rd drive singal W+, four-wheel drive signal U-, 5th drive singal V-and the 6th drive singal W-drives corresponding IGBT work in the three-phase full-bridge inverting circuit in electrical equipment.It should be noted that, the object that the first enable control signal HIGH_DRV_EN and the second enable control signal LOW_DRV_EN controls the first tristate buffer U2 and the second tristate buffer U3 by interleaved mode reduces to cause the uncontrollable probability of the signal for controlling drive circuit 1516 because certain cell enable in the first tristate buffer U2 and the second tristate buffer U3 loses efficacy.And the first tristate buffer U2 and the second tristate buffer U3 realizes redundancy, improves hardware circuit safety integrity level.
Wherein, the Enable Pin of the second tristate buffer U3 is Low level effective, in running order, quits work when Enable Pin is high level.
When needing when there being STO demand to use STO control circuit 152, the 2nd STO function triggering signal STO_EN=1 that control module 1511 exports.The first enable control signal HIGH_DRV_EN that first enable control circuit 1512 exports and the second enable control signal LOW_DRV_EN that the second enable control circuit 1513 exports are all relevant with the level height of the STO control circuit 152 exports the 3rd safe input signal STO_HIGH_CTR, when the 3rd safe input signal STO_HIGH_CTR is low level, the first enable control signal HIGH_DRV_EN is low level and the second enable control signal LOW_DRV_EN is low level, and when the 3rd safe input signal STO_HIGH_CTR is high level, the first enable control signal HIGH_DRV_EN is high level and the second enable control signal LOW_DRV_EN is high level.And first to ensure that STO control circuit 152 can normally work, therefore need to judge whether STO control circuit 152 breaks down.When judging whether STO control circuit 152 breaks down, ensure that emergency stop switch SW1 is in closure state, the first narrow pulse signal Self_Ts to STO control circuit 152 is exported by control module 1511, during the narrow pulse signal of control module 1511 in the narrow pulse signal detected in the second safe input signal STO1 and the 5th safe input signal STO2, STO control circuit 152 fault-free is described, can normally uses; During the safe input signal of control module 1511 in the narrow pulse signal that can't detect in the second safe input signal STO1 and the 5th safe input signal STO2, illustrate that STO control circuit 152 breaks down, control module 1511 points out STO control circuit 152 to break down, and fixes a breakdown in time to make staff.
When detecting STO control circuit 152 fault-free, in order to trigger STO function, emergency stop switch SW1 is disconnected, 3rd safe input signal STO_HIGH_CTR and the 6th safe input signal STO_LOW_CTR is high level, 3rd safe input signal STO_HIGH_CTR and STO_EN synthesizes, obtain the first enable control signal HIGH_DRV_EN of high level, 6th safe input signal STO_LOW_CTR and STO_EN synthesizes, obtain the second enable control signal LOW_DRV_EN of high level, thus cut-off the first tristate buffer U2 and the second tristate buffer U3, to control a PWM drive singal EPWM1A, 2nd PWM drive singal EPWM2A, 3rd PWM drive singal EPWM3A, 4th PWM drive singal EPWM1B, 5th PWM drive singal EPWM2B and the 6th PWM drive singal EPWM3B cannot export thus realize STO function.
When detecting STO control circuit 152 fault-free, and when not triggering STO function, emergency stop switch SW1 is closure state, the 3rd safe input signal STO_HIGH_CTR that STO control circuit 152 exports is low level, first enable control signal HIGH_DRV_EN and the second enable control signal are also low level, and the first tristate buffer U2 and the second tristate buffer U3 normally works.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
A kind of STO control circuit provided the application above and system are described in detail, apply specific case herein to set forth the principle of the application and execution mode, the explanation of above embodiment is just for helping method and the core concept thereof of understanding the application; Meanwhile, for one of ordinary skill in the art, according to the thought of the application, all will change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application.

Claims (10)

1. a STO control circuit, is characterized in that, comprising: signaling conversion circuit, the first photoelectric coupled circuit, the first shaping circuit and a RC filter circuit;
The input of described signaling conversion circuit, for receiving the first narrow pulse signal;
The first input end of described first photoelectric coupled circuit is connected with the output of described signaling conversion circuit, second input of described first photoelectric coupled circuit is for receiving a STO function triggering signal, the output of described first photoelectric coupled circuit is connected with the input of described first shaping circuit, and the output of described first shaping circuit is connected with the input of a described RC filter circuit;
Described signaling conversion circuit, for being converted to the second narrow pulse signal that described first photoelectric coupled circuit can identify by described first narrow pulse signal;
Described first photoelectric coupled circuit, for isolating described second narrow pulse signal and a described STO function triggering signal and compare process, obtains the first safe input signal;
Described first shaping circuit, for carrying out shaping to described first safe input signal, obtains the second safe input signal, and exports described second safe input signal;
A described RC filter circuit, for carrying out filtering to described second safe input signal, obtains the 3rd safe input signal, and exports described 3rd safe input signal.
2. STO control circuit according to claim 1, is characterized in that,
Described signaling conversion circuit comprises: the 3rd isolation optocoupler, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 5th electric capacity, the first triode and the 3rd voltage stabilizing didoe;
Described first photoelectric coupled circuit comprises: the first resistance, the second resistance, the 3rd resistance, the first electric capacity, the second electric capacity and the first isolation optocoupler;
A described RC filter circuit comprises: the 12 resistance and the 6th electric capacity;
The first end of described 7th resistance is as the input of described signaling conversion circuit, second end of described 7th resistance is connected with the described 3rd second input of isolating optocoupler with the first end of described 8th resistance respectively, and the second end of described 8th resistance is connected with described 3rd first input end of isolating optocoupler with the first power supply respectively;
First output of described 3rd isolation optocoupler is connected with the first end of described tenth resistance with the collector electrode of described first triode respectively, second output of described 3rd isolation optocoupler is connected with the base stage of described first triode with the first end of described 5th electric capacity, the first end of described 9th resistance respectively, second end ground connection of described 5th electric capacity, second end ground connection of described 9th resistance, the grounded emitter of described first triode;
Second end of described tenth resistance is as the output of described signaling conversion circuit, the first end of described 11 resistance is connected with the second end of described tenth resistance, second end of described 11 resistance is connected with second source, the negative electrode of described 3rd voltage stabilizing didoe is connected with the second end of described tenth resistance, the plus earth of described 3rd voltage stabilizing didoe;
The first end of described first resistance is as the first input end of described first photoelectric coupled circuit, the second input that second end of described first resistance isolates optocoupler with second end and described first of described first electric capacity is respectively connected, and the first end of described first electric capacity is connected with the described first first input end of isolating optocoupler and as the second input of described first photoelectric coupled circuit;
First output of described first isolation optocoupler is connected with the first end of described 3rd resistance with the first end of described second resistance respectively, second end of described second resistance is connected with the first power supply, second end of described 3rd resistance is connected as the output of described first photoelectric coupled circuit with the first end of described second electric capacity respectively, second end ground connection of described second electric capacity, the second output head grounding of described first isolation optocoupler;
The first end of described 12 resistance is as the input of a described RC filter circuit, second end of described 12 resistance is connected with the first end of described 6th electric capacity and as the output of a described RC filter circuit, the second end ground connection of described 6th electric capacity.
3. STO control circuit according to claim 2, is characterized in that, described first photoelectric coupled circuit also comprises:
First voltage stabilizing didoe, the anode of described first voltage stabilizing didoe is connected with the second end of described first resistance, and the second input that the negative electrode and described first of described first voltage stabilizing didoe isolates optocoupler is connected.
4. STO control circuit according to claim 3, is characterized in that, described first isolation optocoupler also comprises: the first diode and the 4th diode;
The anode of described first diode is connected with the first end of described first electric capacity, and the negative electrode of described first diode is connected with the described first first input end of isolating optocoupler;
The negative electrode of described 4th diode is connected with the second end of described first electric capacity, and the anode of described 4th diode is connected with the anode of described first voltage stabilizing didoe.
5. STO control circuit according to claim 4, is characterized in that, described first photoelectric coupled circuit also comprises:
Second diode and the 3rd diode;
The negative electrode of described second diode is connected with the first end of described first electric capacity, and the anode of described second diode is connected with the anode of described first voltage stabilizing didoe;
The anode of described 3rd diode is connected with the second end of described first resistance, and the negative electrode of described 3rd diode is connected with the described first first input end of isolating optocoupler.
6. the STO control circuit according to claim 2-5 any one, is characterized in that, described STO control circuit also comprises:
Second photoelectric coupled circuit identical with described first photoelectric coupled circuit structure;
Second shaping circuit identical with described first shaping circuit structure;
The two RC filter circuit identical with a described RC filter circuit construction;
The first input end of described second photoelectric coupled circuit is connected with the output of described signaling conversion circuit, second input of described second photoelectric coupled circuit is for receiving a described STO function triggering signal, the output of described second photoelectric coupled circuit is connected with the input of described second shaping circuit, and the output of described second shaping circuit is connected with the input of described 2nd RC filter circuit;
Described second photoelectric coupled circuit, for isolating described second narrow pulse signal and a described STO function triggering signal and compare process, obtains the 4th safe input signal;
Described second shaping circuit, for carrying out shaping to described 4th safe input signal, obtains the 5th safe input signal, and exports described 5th safe input signal;
Described 2nd RC filter circuit, for carrying out filtering to described 5th safe input signal, obtains the 6th safe input signal, and exports described 6th safe input signal.
7. a STO control system, is characterized in that, comprises electrical equipment and the STO control circuit as described in claim 1-6 any one;
Described electrical equipment comprises: control module, the first enable control circuit, the first tristate buffer and the first pull-up resistor group;
Described control module, for exporting the first narrow pulse signal to described STO control circuit, and export the 2nd STO function triggering signal to described first enable control circuit, and export PWM drive singal to described first tristate buffer, and receive the second safe input signal of described STO control circuit output, and whether STO control circuit breaks down according to described second safe input-signal judging;
Described first enable control circuit, for receiving the 3rd safe input signal of described STO control circuit output and described 2nd STO function triggering signal, and described 3rd safe input signal and described 2nd STO function triggering signal are carried out and computing, export corresponding first and enablely control signal to described first tristate buffer;
Described first tristate buffer, for when described first enable control signal is effective, output drive signal is to the drive circuit of described electrical equipment;
Described first pull-up resistor group is connected with the output of described first tristate buffer.
8. STO control system according to claim 7, is characterized in that, described first enable control circuit comprises: the 9th diode, the tenth diode and the 26 resistance;
Described first pull-up resistor group comprises: the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance and the 19 resistance;
The first input end of described control module is connected with the output of the first shaping circuit of described STO control circuit, first output of described control module is connected with the input of the signaling conversion circuit of described STO control circuit, second output of described control module is connected with the negative electrode of described tenth diode, 3rd output of described control module is connected with the first input end of described first tristate buffer, 4th output of described control module is connected with the second input of described first tristate buffer, 5th output of described control module is connected with the 3rd input of described first tristate buffer, 6th output of described control module is connected with the four-input terminal of described first tristate buffer, 7th output of described control module is connected with the 5th input of described first tristate buffer, 8th output of described control module is connected with the 6th input of described first tristate buffer,
The negative electrode of the 9th diode is connected with the output of a RC filter circuit of described STO control circuit, the anode of described 9th diode is connected with the first Enable Pin of described first tristate buffer with the anode of described tenth diode, the first end of described 26 resistance respectively, and the second end of described 26 resistance is connected with the first power supply;
First output of described first tristate buffer, the second output, the 3rd output, the 4th output, the 5th output are all connected with the input of described drive circuit with the 6th output;
The first end of described 14 resistance is connected with the first output of described first tristate buffer, the first end of described 15 resistance is connected with the second output of described first tristate buffer, the first end of described 16 resistance is connected with the 3rd output of described first tristate buffer, the first end of described 17 resistance is connected with the 4th output of described first tristate buffer, the first end of described 18 resistance is connected with the 5th output of described first tristate buffer, the first end of described 19 resistance is connected with the 6th output of described first tristate buffer,
Second end of described 14 resistance, the second end of described 15 resistance, the second end of described 16 resistance, the second end of described 17 resistance, the second end of described 18 resistance are all connected with described first power supply with the second end of described 19 resistance.
9. system according to claim 8, is characterized in that, also comprises: the second enable control circuit, the second tristate buffer and the second pull-up resistor group;
Described second enable control circuit, for receiving the 6th safe input signal of described STO control circuit output and described 2nd STO function triggering signal, and described 6th safe input signal and described 2nd STO function triggering signal are carried out and computing, export corresponding second and enablely control signal to described second tristate buffer;
Described second tristate buffer, for when described second enable control signal is effective, output drive signal is to the drive circuit of described electrical equipment;
Described second pull-up resistor group is connected with the output of described second tristate buffer.
10. STO control system according to claim 9, is characterized in that, described second enable control circuit comprises: the 11 diode, the 12 diode and the 27 resistance;
Described second pull-up resistor group comprises: the 20 resistance, the 21 resistance, the 22 resistance, the 23 resistance, the 24 resistance and the 25 resistance;
The negative electrode of the 11 diode is connected with the output of described 2nd RC filter circuit, the anode of described 11 diode is connected with the first Enable Pin of described second tristate buffer with the second Enable Pin of described first tristate buffer respectively with the first end of the anode of described 12 diode, described 27 resistance respectively, and the second end of described 27 resistance is connected with described first power supply;
Second Enable Pin of described second tristate buffer is connected with the anode of described 9th diode;
First output of described first tristate buffer is connected with the first input end of described second tristate buffer, second output of described first tristate buffer is connected with the second input of described second tristate buffer, 3rd output of described first tristate buffer is connected with the 3rd input of described second tristate buffer, 4th output of described first tristate buffer is connected with the four-input terminal of described second tristate buffer, 5th output of described first tristate buffer is connected with the 5th input of described second tristate buffer, 6th output of described first tristate buffer is connected with the 6th input of described second tristate buffer,
First output of described second tristate buffer, the second output, the 3rd output, the 4th output, the 5th output are all connected with the second input of described drive circuit with the 6th output;
The first end of described 20 resistance is connected with the first output of described second tristate buffer, the first end of described 21 resistance is connected with the second output of described second tristate buffer, the first end of described 22 resistance is connected with the 3rd output of described second tristate buffer, the first end of described 23 resistance is connected with the 4th output of described second tristate buffer, the first end of described 24 resistance with tell the second tristate buffer the 5th output be connected, the first end of described 25 resistance is connected with the 6th output of described second tristate buffer,
Second end of described 20 resistance, the second end of described 21 resistance, the second end of described 22 resistance, described second end of the 23 resistance, the second end of the 24 resistance are all connected with described first power supply with the second end of described 25 resistance.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106451737A (en) * 2016-10-12 2017-02-22 苏州佳世达光电有限公司 Power supply 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140160804A1 (en) * 2012-07-04 2014-06-12 Rohm Co., Ltd. Dc/dc converter
CN104038188A (en) * 2013-03-08 2014-09-10 控制技术有限公司 Apparatus For Preventing Output Of Input Signal, Apparatus Providing Output Voltage To Driving Motor And Motor Driving System
CN104539214A (en) * 2015-01-12 2015-04-22 深圳市英威腾电气股份有限公司 Communication circuit used for tracking rotation speed of motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140160804A1 (en) * 2012-07-04 2014-06-12 Rohm Co., Ltd. Dc/dc converter
CN104038188A (en) * 2013-03-08 2014-09-10 控制技术有限公司 Apparatus For Preventing Output Of Input Signal, Apparatus Providing Output Voltage To Driving Motor And Motor Driving System
CN104539214A (en) * 2015-01-12 2015-04-22 深圳市英威腾电气股份有限公司 Communication circuit used for tracking rotation speed of motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YUDUOFENGD..: ""安全功能"", 《道客巴巴:HTTP://WWW.DOC88.COM/P-771678482713.HTML》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106451737A (en) * 2016-10-12 2017-02-22 苏州佳世达光电有限公司 Power supply circuit
CN106451737B (en) * 2016-10-12 2019-12-03 苏州佳世达光电有限公司 Power supply 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
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

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