CN107069668A - A kind of frequency converter failure protection device and frequency converter - Google Patents

A kind of frequency converter failure protection device and frequency converter Download PDF

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Publication number
CN107069668A
CN107069668A CN201710304310.6A CN201710304310A CN107069668A CN 107069668 A CN107069668 A CN 107069668A CN 201710304310 A CN201710304310 A CN 201710304310A CN 107069668 A CN107069668 A CN 107069668A
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China
Prior art keywords
resistance
electric capacity
connection
comparator
frequency converter
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CN201710304310.6A
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CN107069668B (en
Inventor
向守兵
夏清和
高建涛
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BEIJING SWORD ELECTRIC INDUSTRIAL Co Ltd
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BEIJING SWORD ELECTRIC INDUSTRIAL Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M1/00—Details of apparatus for conversion
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Inverter Devices (AREA)

Abstract

The invention discloses a kind of frequency converter failure protection device and frequency converter; frequency converter and transformer are connected with power supply respectively; frequency converter outputs signal to contactor to control the start and stop of motor; transformer is connected with safety return circuit, contactor and the start and stop of motor is controlled by safety return circuit; frequency converter and safety return circuit are connected with protection device respectively; protection device includes fault detection module, envelope wave circuit, enabling unit, and the protective effect to frequency converter is realized by protection device.The present invention; by connecting protection device to frequency converter and safety return circuit; protection device is provided with failure detector circuit, envelope wave circuit and enabling unit; various fault messages can effectively be detected and the signal to the IGBT drive circuit output in frequency converter is blocked; so as to which the working condition to frequency converter is effectively protected, the service life, security reliability and service behaviour of frequency converter are improved.

Description

A kind of frequency converter failure protection device and frequency converter
Technical field
The present invention relates to a kind of protection device, and in particular to a kind of frequency converter failure protection device and frequency converter.
Background technology
Frequency converter is widely used in every field, wherein elevator is exactly to pass through frequency conversion as a kind of drive control apparatus The drive control of device realizes operation.
The occurrence of frequency converter often runs into the failure such as under-voltage, over-pressed, excessively stream in use, such failure is such as Fruit does not take the effective precautionary measures, can directly cause frequency converter service life to shorten or even damage, influence the work of frequency converter Performance, so as to trigger the useful life of frequency converter to shorten, security reliability reduction and service behaviour be a series of problems, such as fail.Can See, from the service life, safety and performance perspective of frequency converter, when occurring the failure situations such as under-voltage, over-pressed, excessively stream, why It is the direction for needing to consider that sample, which carries out protection to frequency converter,.
The content of the invention
When the technical problems to be solved by the invention are that frequency converter runs into the failure situation of under-voltage, over-pressed, excessively stream etc., drawn Send out a series of problems of the service life shortening, security reliability reduction and service behaviour failure of frequency converter etc..
In order to solve the above problems, the invention provides a kind of frequency converter failure protection device, the frequency converter and transformation Device is connected with power supply respectively, and the frequency converter outputs signal to contactor to control the start and stop of motor, the transformer and peace Full loop, contactor connect and the start and stop of motor are controlled by the safety return circuit, it is characterised in that the frequency converter and The safety return circuit is connected with the protection device respectively, and the protection device includes：
Fault detection module, for fault detect simultaneously outputs level signals, and the output of input and the safety return circuit End connection, it includes undervoltage detection circuit, high-voltage detecting circuit, over-voltage detection circuit, module fault detecting circuit, over-current detection Circuit and reset detection circuit, and be connected each other with door successively；
Wave circuit is sealed, locking signal, the envelope ripple are exported for receiving the level signal, and according to the level signal The input of circuit is connected with the output end of the fault detection module；
Enabling unit, for receiving the locking signal that the output end of the envelope wave circuit is exported, and according to locking signal pair The IGBT drive signals of the frequency converter are blocked, and the output end of the input of the enabling unit and the envelope wave circuit connects Connect, the output end of the enabling unit and the input of frequency converter are connected.
Preferably, the protection device also includes：
Arm processor, the level signal for receiving the fault detection module output, the arm processor Input is connected with the output end of the fault detection module；
DSP Processor, for receiving described in output signal and the failure detector circuit output of the arm processor Level signal, and the enabling unit is outputed signal to, the input of the DSP Processor is defeated with the failure detector circuit Go out end, the output end connection of the arm processor, the input of the output end of the DSP Processor and the enabling unit connects Connect；
The enabling unit receives the signal of the DSP Processor output, and the IGBT drive signals of the frequency converter are entered Row software pulse blocking.
Preferably, the undervoltage detection circuit includes：Resistance R901, electricity that one end is connected with control supply voltage CVD ends Hinder R902, electric capacity C904, the electric capacity C904 that one end is connected with the other end of the resistance R901 other end and the electricity The resistance R902 other end is connected and is grounded；One end is connected with the other end of the resistance R901, one end of the electric capacity C904 First diode group D901, the plus earth of the first diode of the first diode group D901, the negative pole of the second diode Connect 3.3V power supplys；One end and the resistance R901 other end, one end of the electric capacity C904, the first diode group The resistance R906 of common port connection；The resistance R912 that one end is connected with reference voltage 3.3Vref, one end is with the resistance R912's Resistance R911, resistance R907, the electric capacity C902 of other end connection, the other end of the resistance R911 are another with the electric capacity C902's One end connects and is grounded；Negative pole is connected with the other end of the resistance R906, and positive pole and the resistance R912 other end, institute State the comparator U901 of one end connection of resistance R911 one end, one end of the resistance R907, the electric capacity 901, the ratio Output end compared with device U901 is connected with the other end of the resistance R907, resistance R934 one end, one end and the resistance R934 Other end connection resistance R933, the resistance R933 other end connection 3.3V power supplys, one end and the resistance R934's The other end ground connection of the other end, the electric capacity C902, the electric capacity C902 of one end connection of the resistance R933, one end and the electricity The resistance R934 other end, one end of the resistance R933, one end of the electric capacity C902, the output end of the undervoltage detection circuit Second diode group D902 of LU connections, the plus earth of the 3rd diode of the second diode group D902, the four or two grade The negative pole connection 3.3V power supplys of pipe；
The output end LU of the undervoltage detection circuit is connected with resistance R1 one end, the other end and resistance of the resistance R1 The base stage connection of one end, triode Q1 after R2 and electric capacity C1 is in parallel, the other end and institute after the resistance R2 and electric capacity C1 are in parallel State triode Q1 emitter stage connection and be grounded, the colelctor electrode of the triode Q1 and resistance R3 one end, diode D1 it is negative Pole is connected, the other end ground connection of the resistance R3.
Preferably, the high-voltage detecting circuit includes：One end returns to module T103 A ends, the one of resistance R111 with safety Resistance R114, the resistance R117 that one end is connected with the other end of the resistance R114 of connection are held, the resistance R117's is another End is connected with voltage suppressor D47 one end, and the other end of the voltage suppressor D47 connects with voltage suppressor D48 one end Connect, the A ends of the other end and resistance R120 one end, electric capacity C45 one end, four-way transistor G23 of the voltage suppressor D48 connect Connect；The other end of the resistance R111 returns to module T103 D ends with the safety, the other end of the resistance R120, described The B ends connection of the electric capacity C45 other end, the four-way transistor G23, the C-terminal of the four-way transistor G23 is with resistance R137's One end is connected, the D ends ground connection of the four-way transistor G23, the other end of the resistance R137 and resistance R163 one end, electric capacity C49 one end, schmitt inverter U12A input connection, the schmitt inverter U12A and electric capacity C48 one end ,+ 3V power supplys are connected, and the other end ground connection of the electric capacity C48, the schmitt inverter U12A is provided with earth terminal, the Schmidt Phase inverter U12A output end is connected with resistance R153 one end, double Schottky diode D162 negative pole, the resistance R153 The other end be connected with the input of electric capacity C57 one end, resistance R56 one end, schmitt inverter U12B, the resistance The R56 other end is connected with described couple of Schottky diode D162 positive pole, the other end ground connection of the electric capacity C57；It is described to apply Close special phase inverter U12B output end is connected with resistance R134 one end, light emitting diode L23 negative pole, the light emitting diode L23 positive pole is connected with resistance R131 one end, and the other end of the resistance R131 is connected with+3V power supplys, the resistance R134 The other end be connected with resistance R160 one end, the output end HV of the high-voltage detecting circuit, the other end of the resistance R160 It is connected with electric capacity C63 one end, the other end ground connection of the electric capacity C63；
The output end HV of the high-voltage detecting circuit is connected with diode D2 negative pole, the positive pole of the diode D2 and institute State diode D1 positive pole, resistance R4 one end, one end of C2 electric capacity and be connected with door device U1 A ends, the resistance R4's is another One end connects power supply, the other end ground connection of the C2 electric capacity.
Preferably, the over-voltage detection circuit includes：Resistance R903, electricity that one end is connected with control supply voltage DBVD ends Hinder R904；Electric capacity C905, the electric capacity C905 that one end is connected with the other end of the resistance R903 other end and the electricity The resistance R904 other end is connected and is grounded；One end is connected with the other end of the resistance R903, one end of the electric capacity C905 3rd diode group D903, the plus earth of the 5th diode of the 3rd diode group D903, the negative pole of the 6th diode Connect 3.3V power supplys；One end and the resistance R903 other end, one end of the electric capacity C905, the 3rd diode group The resistance R905 of common port connection；The resistance 909 that one end is connected with reference voltage, one end and the other end of the resistance R909 connect Resistance R908, resistance R910, the electric capacity C903 connect, the other end of the resistance R908 is connected with the other end of the electric capacity C903 And be grounded；Negative pole be connected with the other end of the resistance R905 and positive pole and the resistance R908 one end, the resistance R909 The other end, one end of the resistance R910, the electric capacity 903 one end connection comparator U902, the comparator U902 Output end be connected with the other end of the resistance R910, resistance R936 one end；One end and the other end of the resistance R936 The resistance R935, the resistance R935 of connection other end connection 3.3V power supplys；One end and the resistance R936 other end, institute State the electric capacity C922, the electric capacity C922 of resistance R935 one end connection other end ground connection；One end is with the resistance R936's The other end, one end of the resistance R935, one end of the electric capacity C922, the output end LU connections of the undervoltage detection circuit 4th diode group D904, the plus earth of the 7th diode of the 4th diode group D904, the negative pole of the 8th diode Connect 3.3V power supplys；
The output end OU and electric capacity C3 of the over-voltage detection circuit one end and it is connected with door device U1 B ends, the electric capacity C3 other end ground connection, is connected with door device U1 Y ends with the A ends with door device U2.
Preferably, the module fault detecting circuit includes：The resistance that one end is connected with dc bus sampled point DC_BUS R211, the other end of the resistance R211 is connected with resistance R213 one end, electric capacity C202 one end, and the resistance R213's is another One end is connected with the positive pole of resistance R215 one end, resistance R216 one end, comparator U204, the other end of the resistance R215 It is connected with reference voltage terminal REF, the other end of the electric capacity C202 is connected with resistance R212 one end, resistance R214 one end； The other end of the resistance R212 and zero line N, the other end of the resistance R216, electric capacity C204 one end, the one of electric capacity C205 End, resistance R222 are connected with one end after electric capacity C206 parallel connections；The other end of the resistance R214 is with the comparator U204's One end after negative pole, resistance R232 are in parallel with electric capacity C216 is connected；The output end of the comparator U204 and the one of resistance R233 End is connected, the other end, resistance R218 after the other end of the resistance R233 is in parallel with electric capacity C216 with the resistance R232 One end is connected, the other end, comparator U201 negative pole, the comparator of the other end of the resistance R218 and the electric capacity C205 U202 positive pole connection；Positive pole, resistance R219 one end, the resistance of the other end of the electric capacity C204 and the comparator U201 One end after R220 is in parallel with resistance R221 is connected, and the other end of the resistance R219 is connected with reference voltage terminal REF；The electricity The other end after resistance R222 and electric capacity C206 are in parallel and the resistance R220 and the other end after resistance R221 parallel connections, described compared Device U202 negative pole connection, the comparator U202 is connected with power port+VCC and zero line N, the output of the comparator U202 End is connected with the B ends of the output end of the comparator U201, resistance R230 one end, four-way transistor, the resistance R230 The other end be connected with the one end at the A ends, resistance R223 one end, electric capacity C219 of the four-way transistor, the resistance The R223 other end and resistance R240 one end, power port+VCC are connected, the other end and the electric capacity of the resistance R240 C219 other end connection, the C-terminal of the four-way transistor is connected and is grounded with electric capacity C220 one end, and the four-way is brilliant The D ends of body pipe are connected with resistance R231 one end, resistance R239 one end, the other end ground connection of the resistance R231, the electricity The resistance R239 other end is connected with the other end of the electric capacity C220, the output end FO of module fault detecting circuit；
The output end FO of the module fault detecting circuit is connected with resistance R5 one end, resistance the R5 other end and electric capacity C4 one end, it is connected with door device U2 B ends, is connected with door device U2 Y ends with the A ends with door device U3.
Preferably, the over-current detection circuit includes：Supply voltage IU ends and resistance R802 one end, the one of resistance R803 End connection, the other end of the resistance R802 is connected with electric capacity C808 one end, comparator U801 negative pole, the comparator The positive pole that electric current+Vref_OC is compared in U801 positive pole and electric capacity C803 one end, benchmark is connected, and the electric capacity C803's is another End ground connection；The comparator U801 is connected with 15V power supplys, and the negative pole of the 15V power supplys is connected with electric capacity C819 one end, described Electric capacity C819 other end ground connection, the positive pole of the 15V power supplys is connected with electric capacity C820 one end, and the electric capacity C820's is another End ground connection；The other end of the resistance R803 is connected with electric capacity C809 one end, comparator U802 positive pole, the electric capacity C809 The other end be connected and be grounded with the other end of the electric capacity C808, the negative pole of the comparator U802 compared with benchmark electric current- One end connection of Vref_OC negative pole, electric capacity C802, electric capacity C802 other end ground connection；
Supply voltage IV ends are connected with resistance R804 one end, resistance R805 one end, the other end of the resistance R804 One end, comparator U803 negative pole with electric capacity C810 are connected, the positive pole of the comparator U803 and electric capacity C805 one end, base Standard compares electric current+Vref_OC positive pole connection, the other end ground connection of the electric capacity C805；The comparator U803 is connected with 15V Power supply, the negative pole of the 15V power supplys is connected with electric capacity C817 one end, the other end ground connection of the electric capacity C817, the 15V electricity The positive pole in source is connected with electric capacity C818 one end, the other end ground connection of the electric capacity C818；The other end of the resistance R805 with Electric capacity C811 one end, comparator U804 positive pole connection, the other end of the electric capacity C811 are another with the electric capacity C810's End is connected and is grounded, and the negative pole of the comparator U804 is compared electric current-Vref_OC negative pole, electric capacity C804 one end with benchmark Connection, electric capacity C804 other end ground connection；
Supply voltage IW ends are connected with resistance R806 one end, resistance R807 one end, the other end of the resistance R806 One end, comparator U805 negative pole with electric capacity C812 are connected, the positive pole of the comparator U805 and electric capacity C807 one end, base Standard compares electric current+Vref_OC positive pole connection, the other end ground connection of the electric capacity C807；The comparator U805 is connected with 15V Power supply, the negative pole of the 15V power supplys is connected with electric capacity C815 one end, the other end ground connection of the electric capacity C815, the 15V electricity The positive pole in source is connected with electric capacity C816 one end, the other end ground connection of the electric capacity C816；The other end of the resistance R807 with Electric capacity C813 one end, comparator U806 positive pole connection, the other end of the electric capacity C813 are another with the electric capacity C812's End is connected and is grounded, and the negative pole of the comparator U806 is compared electric current-Vref_OC negative pole, electric capacity C806 one end with benchmark Connection, electric capacity C806 other end ground connection；
The output end of the comparator U801 and comparator U802, U803, U804, U805, U806 output end, resistance R812 one end connection；The other end of the resistance R812 is connected with resistance R811 one end, triode Q802 base stage, described The resistance R811 other end is connected with the colelctor electrode of+3.3V power supplys, the triode Q802, the emitter stage of the triode Q802 One end, resistance R852 one end with resistance R851, schmitt inverter UA07 input are connected, and the resistance R851's is another One end is connected with electric capacity C841 one end, the other end of the resistance R852, and is grounded.Schmitt inverter UA07 output end It is connected with resistance R853 one end, the other end of the resistance R853 and electric capacity C814 one end, the output of over-current detection circuit Hold OC connections, the other end ground connection of the electric capacity C814；
The output end OC and electric capacity C5 of the over-current detection circuit one end, it is connected with door device U3 B ends, electric capacity C5's is another One end is grounded, and is connected with door device U3 Y ends with the A ends with door device U4.
Preferably, the reset detection circuit includes：Power supply monitor U103, the VCC ends of the power supply monitor U103 It is connected with 3.3V power supplys, the GND ends ground connection of the power supply monitor U103, the RESET ends of the power supply monitor U103 are carried out Power reset works and is connected with the output end RST of reset detection circuit；
The output end RST and resistance R6 of reset detection circuit one end, diode D3 negative pole, diode D4 it is negative Pole is connected, and the resistance R6 other end is connected with resistance R7 one end, electric capacity C6 one end, with door device U4 B ends, and resistance R7's is another One end is connected with diode D3 positive pole, diode D4 positive pole, electric capacity C6 other end ground connection.
The C-terminal with door device U4 and electric capacity C7 one end, 3.3V power supplys are connected, and the D ends with door device U4 are grounded, institute State electric capacity C7 other end ground connection, the Y ends with door device U4 are connected with resistance R8 one end, the other end of the resistance R8 and The base stage connection of one end, triode Q2 after resistance R9 and electric capacity C8 is in parallel, it is another after the resistance R9 and electric capacity C8 are in parallel End is connected and is grounded with the emitter stage of the triode Q2；The colelctor electrode of the triode Q2 is connected with resistance R10 one end, and Outputs level signals, the other end of the resistance R10 is connected with the 3.3V power supplys.
Preferably, the envelope wave circuit includes：
The resistance R101 that one end is connected with the output end OE of the failure detector circuit；
Electric capacity C101, the electric capacity C101 that one end is connected with the other end of the resistance R101 other end ground connection；
The non-gate device F that input is connected with the other end of the resistance R101, one end of the electric capacity C101, the NOT gate Device F output end is connected with resistance R102 one end, and the other end of the resistance R102 connects the 3.3V power supplys, and exports institute Locking signal is stated to the enabling unit.
A kind of frequency converter, including a kind of any of the above-described described frequency converter failure protection device.
The present invention, by connecting protection device to frequency converter and safety return circuit, protection device is provided with failure detector circuit, envelope Wave circuit and enabling unit, can effectively detect various fault messages and to the letter of the IGBT drive circuit output in frequency converter Number blocked, so that the working condition to frequency converter is effectively protected, improve service life, the safety of frequency converter Reliability and service behaviour.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention Some embodiments, for those skilled in the art, on the premise of not paying creative work, can also be according to these Accompanying drawing obtains other accompanying drawings.
Fig. 1 is system module schematic diagram of the invention；
Fig. 2 is the undervoltage detection circuit figure of the fault detection module of the present invention；
Fig. 3 is the high-voltage detecting circuit figure of the fault detection module of the present invention；
Fig. 4 is the over-voltage detection circuit figure of the fault detection module of the present invention；
Fig. 5 is the module fault detecting circuit figure of the fault detection module of the present invention；
Fig. 6 is the over-current detection circuit figure of the fault detection module of the present invention；
Fig. 7 is the reset detection circuit diagram of the fault detection module of the present invention；
Fig. 8 is the first partial circuit diagram of the protection device of the present invention；
Fig. 9 is the second partial circuit diagram of the protection device of the present invention；
Figure 10 is the 3rd partial circuit diagram of the protection device of the present invention；
Figure 11 is the circuit diagram for sealing wave circuit of the invention.
Drawing reference numeral
1. the envelope wave circuit of fault detection module 2.
3. enabling unit 4.ARM processor 5.DSP processors
Embodiment
In order that beneficial effects of the present invention become apparent it is understandable, below in conjunction with the accompanying drawings to technical scheme carry out Detailed description.
Detail is elaborated in the following description to fully understand the present invention.But the present invention can with it is a variety of not Other manner described here is same as to implement.Therefore the present invention is not limited by following public embodiment.
It is as shown in Figure 1 the system module schematic diagram of the present invention, frequency converter and transformer are connected with power supply respectively, and power supply is Three-phase electricity, frequency converter outputs signal to contactor to control the start and stop of motor, and frequency converter output signal is IGBT drive signals； Transformer is connected with safety return circuit, contactor and the start and stop of motor is controlled by safety return circuit, and safety return circuit is by multiple peaces Full switch is constituted, when multiple safety switches are all closed, safety return circuit conducting, as long as conversely, having a safety switch not have Closure, safety return circuit is not turned on；Frequency converter and safety return circuit are connected with protection device respectively, and frequency converter receives the control of protection device Signal processed realizes protective effect, and safety return circuit is the precondition that trigger protection device works, when only safety return circuit is turned on, and is protected Protection unit works, otherwise does not work.Protection device includes：Fault detection module 1, envelope wave circuit 2 and enabling unit 3.
Fault detection module 1 is used for fault detect and outputs level signals, and the output end of input and safety return circuit connects Connect, mainly detect the failures such as under-voltage, high pressure, overvoltage, module failure, excessively stream.It includes undervoltage detection circuit, high pressure detection electricity Road, over-voltage detection circuit, module fault detecting circuit, over-current detection circuit and reset detection circuit, and connect each other with door successively Connect, connected each other by multiple electronic components, the effect for the fault detect effectively realized.
Wherein, reference voltage of the undervoltage detection circuit by voltage comparator to the voltage sampled with setting compares Compared with, when the voltage sampled be more than setting reference voltage when, be that high pressure is effective；When the voltage sampled is less than the benchmark of setting During voltage, undervoltage warning signal is now exported.Opening of the high-voltage detecting circuit by one or more Boolean value output sensors simultaneously The action of high-voltage detecting circuit is triggered with closure, the opening of configuration switch quantity sensor or closure are high pressure detection according to demand The alarm output signal of circuit.Reference voltage of the over-voltage detection circuit by voltage comparator to the voltage sampled with setting enters Row compares, and is that low pressure is effective when the voltage sampled is less than the reference voltage of setting；When the voltage sampled is more than setting During reference voltage, now output overvoltage alarm signal.Over-current detection circuit gathers three-phase voltage and is converted to current signal, passes through Comparator is compared with the reference current value set, when current signal is more than the reference current value of setting, output overcurrent report Alert signal；When current signal is less than the reference current value of setting, not output overcurrent alarm signal.Reset detection circuit is by adopting The supply voltage that collection power supply monitor is monitored, to be operated.It is multiple when the magnitude of voltage that power supply monitor is detected occurs abnormal Position circuit carries out reset work；When the magnitude of voltage that power supply monitor is detected is normal, reset circuit is without work.
As shown in Fig. 2 undervoltage detection circuit includes：Resistance R901, resistance that one end is connected with control supply voltage CVD ends R902, the electric capacity C904 that one end is connected with the resistance R901 other end, the electric capacity C904 other end and the resistance R902 other end Connect and be grounded.The first diode group D901 that one end is connected with the resistance R901 other end, electric capacity C904 one end, the one or two The plus earth of pole pipe group D901 the first diode, the negative pole connection 3.3V power supplys of the second diode.One end and the resistance The R901 other end, electric capacity C904 one end, the resistance R906 of the common port connection of the first diode group.One end and reference voltage The resistance R912 of connection, resistance R911 that one end is connected with the resistance R912 other end, resistance R907, electric capacity C902, resistance The R911 other end is connected and is grounded with the electric capacity C902 other end；Negative pole is connected with the resistance R906 other end, and positive pole with The resistance R912 other end, resistance R911 one end, resistance R907 one end, the comparator U901 of one end connection of electric capacity 901, Comparator U901 output end is connected with the resistance R907 other end, resistance R934 one end.One end is another with resistance R934's Hold the resistance R933 of connection, resistance R933 other end connection 3.3V power supplys, one end and resistance the R934 other end, resistance R933 One end connection electric capacity C902, electric capacity C902 other end ground connection, one end and resistance the R934 other end, the one of resistance R933 End, electric capacity C902 one end, the second diode group D902 of the output end LU connections of undervoltage detection circuit, the second diode group The plus earth of D902 the 3rd diode, the negative pole connection 3.3V power supplys of the 4th diode.
Specific operation principle：The voltage at control supply voltage CVD ends passes through resistance R901, resistance R902, electric capacity C904 Effect reduce impedance, then pass through the first diode group D901 effect and carry out sending anti-phase defeated to comparator U901 after amplitude limit Enter end.Reference voltage 3.3Vref reduces impedance by resistance R911, electric capacity C902 effect and sent to comparator U901 just Phase input.When the voltage at the control supply voltage CVD ends that inverting input is received is higher than the base that positive input is received During quasi- voltage 3.3Vref, comparator U901 output end output low level；The control supply voltage received when inverting input When the voltage at CVD ends is less than the reference voltage 3.3Vref that positive input is received, the comparator U901 high electricity of output end output It is flat.Because undervoltage detection circuit is that high level is effective, so only when comparator U901 output end exports high level, and lead to Resistance R933, electric capacity C902 filter action are crossed, after the second diode group D902 amplitude limit effect, output undervoltage warning signal is extremely The output end LU of undervoltage detection circuit.
As shown in figure 3, high-voltage detecting circuit includes：One end returns to module T103 A ends, resistance R111 one end with safety The resistance R114 of connection, the resistance R117 that one end is connected with the resistance R114 other end, resistance the R117 other end press down with voltage Device D47 processed one end connection, the voltage suppressor D47 other end is connected with voltage suppressor D48 one end, voltage suppressor The D48 other end is connected with resistance R120 one end, electric capacity C45 one end, four-way transistor G23 A ends.Resistance R111's is another End returns to module T103 D ends, the resistance R120 other end, the electric capacity C45 other end, four-way transistor G23 B ends with safety Connection, four-way transistor G23 C-terminal is connected with resistance R137 one end, four-way transistor G23 D ends ground connection.Resistance R137's The other end is connected with the input of resistance R163 one end, electric capacity C49 one end, schmitt inverter U12A, and Schmidt is anti-phase Device U12A and electric capacity C48 one end ,+3V power supplys are connected, electric capacity C48 other end ground connection, and schmitt inverter U12A is provided with connecing Ground terminal, schmitt inverter U12A output end is connected with resistance R153 one end, Schottky diode D162 negative pole.Resistance The R153 other end is connected with the input of electric capacity C57 one end, resistance R56 one end, schmitt inverter U12B, resistance The R56 other end is connected with double Schottky diode D162 positive pole, electric capacity C57 other end ground connection.Schmitt inverter U12B output end is connected with resistance R134 one end, light emitting diode L23 negative pole, light emitting diode L23 positive pole and electricity R131 one end connection is hindered, the resistance R131 other end is connected with+3V power supplys, the resistance R134 other end and the one of resistance R160 End, the output end HV connections of high-voltage detecting circuit, the resistance R160 other end are connected with electric capacity C63 one end, and electric capacity C63's is another One end is grounded.
Specific operation principle：Safety return circuit T103 A ends, the voltage signal at D ends pass through voltage suppressor D47, D48 Voltage inhibitory action limitation low-voltage is flowed into；Resistance R120, electric capacity C45 effect reduction impedance, schmitt inverter U12A, U12B low and high level transformation；Resistance R156 carries out the effect of partial pressure after being connected with Schottky diode D162；Resistance R160 connects with electric capacity C163 is filtered effect, the output end HV of output alarm for high voltage signal to high-voltage detecting circuit.
As shown in figure 4, over-voltage detection circuit includes：Resistance R903, electricity that one end is connected with control supply voltage DBVD ends Hinder R904.The electric capacity C905 that one end is connected with the resistance R903 other end, electric capacity the C905 other end are another with resistance R904's End connects and is grounded.The 3rd diode group D903 that one end is connected with the resistance R903 other end, electric capacity C905 one end, the 3rd The plus earth of diode group D903 the 5th diode, the negative pole connection 3.3V power supplys of the 6th diode.One end and resistance The R903 other end, electric capacity C905 one end, the resistance R905 of the common port connection of the 3rd diode group.One end and reference voltage The resistance 909 of connection, resistance R908 that one end is connected with the resistance R909 other end, resistance R910, electric capacity C903, resistance R908 The other end be connected and be grounded with the electric capacity C903 other end.Negative pole is connected and positive pole and resistance with the resistance R905 other end R908 one end, the resistance R909 other end, resistance R910 one end, the comparator U902 of one end connection of electric capacity 903, compare Device U902 output end is connected with the resistance R910 other end, resistance R936 one end.One end and the resistance R936 other end connect The resistance R935 connect, resistance R935 other end connection 3.3V power supplys.One end and resistance the R936 other end, the one of resistance R935 Hold the electric capacity C922 of connection, electric capacity C922 other end ground connection.One end and resistance R936 other end, resistance R935 one end, Electric capacity C922 one end, the 4th diode group D904, the 4th diode group D904 of the output end LU connections of undervoltage detection circuit The 7th diode plus earth, the 8th diode negative pole connection 3.3V power supplys.
Specific operation principle：The voltage at control supply voltage DBVD ends passes through resistance R903, resistance R904, electric capacity C905 Effect reduce impedance, then pass through the 3rd diode group D903 effect and carry out sending anti-phase defeated to comparator U902 after amplitude limit Enter end.Reference voltage 3.3Vref reduces impedance by resistance R908, electric capacity C903 effect and sent to comparator U902 just Phase input.When the voltage at the control supply voltage DBVD ends that inverting input is received is higher than the base that positive input is received During quasi- voltage 3.3Vref, comparator U902 output end output low level；The control supply voltage received when inverting input When the voltage at DBVD ends is less than the reference voltage 3.3Vref that positive input is received, comparator U902 output end output is high Level.Because over-voltage detection circuit is that low level is effective, so only when comparator U902 output end exports low level, and Pass through resistance R935, electric capacity C922 filter action, after the second diode group D904 amplitude limit effect, output overvoltage alarm signal To the output end OU of over-voltage detection circuit.
As shown in figure 5, module fault detecting circuit includes：The resistance that one end is connected with dc bus sampled point DC_BUS R211, resistance the R211 other end are connected with resistance R213 one end, electric capacity C202 one end, resistance the R213 other end and electricity Hinder the positive pole connection of R215 one end, resistance R216 one end, comparator U204, resistance the R215 other end and reference voltage terminal REF connections, the electric capacity C202 other end is connected with resistance R212 one end, resistance R214 one end.The resistance R212 other end It is in parallel with electric capacity C206 with zero line N, the resistance R216 other end, electric capacity C204 one end, electric capacity C205 one end, resistance R222 One end connection afterwards.One after the resistance R214 other end is in parallel with electric capacity C216 with comparator U204 negative pole, resistance R232 End connection.Comparator U204 output end is connected with resistance R233 one end, resistance the R233 other end and resistance R232 and electricity Hold the other end after C216 parallel connections, resistance R218 one end connection, the resistance R218 other end and the electric capacity C205 other end, ratio The positive pole connection of negative pole, comparator U202 compared with device U201.The electric capacity C204 other end and comparator U201 positive pole, resistance R219 one end, resistance R220 are connected with one end after resistance R221 parallel connections, resistance the R219 other end and reference voltage terminal REF Connection.The other end after resistance R222 and electric capacity C206 are in parallel and resistance R220 and the other end after resistance R221 parallel connections, compared Device U202 negative pole connection, comparator U202 is connected with power port+VCC and zero line N, and comparator U202 output end is with being compared Device U201 output end, resistance R230 one end, four-way transistor PC202 B ends connection.The resistance R230 other end and four Channel transistor PC202 A ends, resistance R223 one end, electric capacity C219 one end connection, resistance the R223 other end and resistance R240 one end, power port+VCC connections, the resistance R240 other end are connected with the electric capacity C219 other end, four-way crystal Pipe PC202 C-terminal is connected and is grounded with electric capacity C220 one end, four-way transistor PC202 D ends and the one of resistance R231 End, resistance R239 one end connection, resistance R231 other end ground connection, the resistance R239 other end are another with electric capacity C220's End, the output end FO connections of module fault detecting circuit.
Specific operation principle is as follows：Dc bus sampled point DC_BUS current signal, the current signal of N-terminal is received, It is compared by comparator U204 and exports high level or low level signal, level signal carries out reduction impedance, filtered at end After reason, then it is compared by comparator U201, comparator U202, and output end level signal is sent to four-way transistor PC202, by four-way transistor PC202 output module fault detection signals.
As shown in fig. 6, over-current detection circuit includes：Supply voltage IU ends and resistance R802 one end, the one of resistance R803 End connection, the resistance R802 other end is connected with electric capacity C808 one end, comparator U801 negative pole, comparator U801 positive pole The positive pole that electric current+Vref_OC is compared in one end, benchmark with electric capacity C803 is connected, electric capacity C803 other end ground connection.Comparator U801 is connected with 15V power supplys, and the negative pole of 15V power supplys is connected with electric capacity C819 one end, electric capacity C819 other end ground connection, 15V The positive pole of power supply is connected with electric capacity C820 one end, electric capacity C820 other end ground connection.The resistance R803 other end and electric capacity C809 one end, comparator U802 positive pole connection, the electric capacity C809 other end are connected and are grounded with the electric capacity C808 other end, Comparator U802 negative pole compares electric current-Vref_OC negative pole, electric capacity C802 one end with benchmark and is connected, and electric capacity C802's is another One end is grounded.
Supply voltage IV ends are connected with resistance R804 one end, resistance R805 one end, resistance the R804 other end and electricity Hold C810 one end, comparator U803 negative pole connection, comparator U803 positive pole is compared electric with electric capacity C805 one end, benchmark Stream+Vref_OC positive pole connection, electric capacity C805 other end ground connection.Comparator U803 is connected with 15V power supplys, 15V power supplys it is negative Pole is connected with electric capacity C817 one end, and electric capacity C817 other end ground connection, the positive pole of 15V power supplys connects with electric capacity C818 one end Connect, electric capacity C818 other end ground connection.The positive pole of the resistance R805 other end and electric capacity C811 one end, comparator U804 connects Connect, the electric capacity C811 other end is connected and is grounded with the electric capacity C810 other end, comparator U804 negative pole is compared electric with benchmark One end connection of stream-Vref_OC negative pole, electric capacity C804, electric capacity C804 other end ground connection.
Supply voltage IW ends are connected with resistance R806 one end, resistance R807 one end, resistance the R806 other end and electricity Hold C812 one end, comparator U805 negative pole connection, comparator U805 positive pole is compared electric with electric capacity C807 one end, benchmark Stream+Vref_OC positive pole connection, electric capacity C807 other end ground connection.Comparator U805 is connected with 15V power supplys, 15V power supplys it is negative Pole is connected with electric capacity C815 one end, and electric capacity C815 other end ground connection, the positive pole of 15V power supplys connects with electric capacity C816 one end Connect, electric capacity C816 other end ground connection.The positive pole of the resistance R807 other end and electric capacity C813 one end, comparator U806 connects Connect, the electric capacity C813 other end is connected and is grounded with the electric capacity C812 other end, comparator U806 negative pole is compared electric with benchmark One end connection of stream-Vref_OC negative pole, electric capacity C806, electric capacity C806 other end ground connection.
Comparator U801 output end and comparator U802, U803, U804, U805, U806 output end, resistance R812 One end is connected.The resistance R812 other end is connected with resistance R811 one end, triode Q802 base stage, and resistance R811's is another End is connected with the colelctor electrode of+3.3V power supplys, triode Q802, triode Q802 emitter stage and resistance R851 one end, resistance R852 one end, schmitt inverter UA07 input connection, the resistance R851 other end and electric capacity C841 one end, resistance R852 other end connection, and be grounded.Schmitt inverter UA07 output end is connected with resistance R853 one end, resistance R853 The other end be connected with electric capacity C814 one end, the output end OC of over-current detection circuit, electric capacity C814 other end ground connection.
Specific operation principle is as follows：IU ends, IV ends, the voltage signal at IW ends are received, and passes through series resistance respectively R802, R803, R804, R805, R806, R807, send current signal to comparator U801, U803, U805 end of oppisite phase, compare Device U802, U804, U806 forward end.Comparator U801, U803, U805 positive terminal receive benchmark and compare electric current+Vref_ OC, comparator U802, U804, U806 end of oppisite phase receive benchmark and compare electric current-Vref_OC.According to comparative result comparator U801, U802, U803, U804, U805, U806 export high level or low level respectively, and output end is connected to a common node, Pass through triode Q802, schmitt inverter UA07 effect, the output end of output overcurrent alarm signal to over-current detection circuit OC。
As shown in fig. 7, power supply monitor U103, power supply monitor U103 VCC ends are connected with 3.3V power supplys, Power Supply Monitoring Device U103 GND ends ground connection, power supply monitor U103 RESET ends carry out power reset work and defeated with reset detection circuit Go out to hold RST to connect.The power supply voltage signal of power supply monitor U103 collections is compared with 3.3V power supplys, when the power supply gathered Voltage signal deviates 3.3V and when within the scope of set by power supply monitor U103, and power supply monitor U103 does not export reset Alarm signal；As the power supply voltage signal deviation 3.3V gathered and when outside the scope set by power supply monitor U103, Power supply monitor U103 outputs reset alarm signal to the output end RST of reset detection circuit.
Wherein Fig. 8, Fig. 9, Figure 10 are followed successively by the partial circuit diagram of protection device, as shown in figure 8, undervoltage detection circuit is defeated Go out to hold LU and resistance R1 one end to be connected, one end, triode Q1 after the resistance R1 other end is in parallel with resistance R2 and electric capacity C1 Base stage connection, the other end is connected and is grounded with triode Q1 emitter stage after resistance R2 and electric capacity C1 are in parallel, triode Q1's Colelctor electrode is connected with resistance R3 one end, diode D1 negative pole, resistance R3 other end ground connection.
The output end HV of high-voltage detecting circuit is connected with diode D2 negative pole, and diode D2 positive pole is with diode D1's Positive pole, resistance R4 one end, one end of C2 electric capacity and it is connected with door device U1 A ends, resistance R4 other end connection power supply, C2 electricity The other end ground connection of appearance.
The output end OU and electric capacity C3 of over-voltage detection circuit one end and it is connected with door device U1 B ends, electric capacity C3's is another End ground connection, is connected with door device U1 Y ends with the A ends with door device U2.
As shown in figure 9, the output end FO of module fault detecting circuit is connected with resistance R5 one end, the resistance R5 other end One end with electric capacity C4, it is connected with door device U2 B ends, is connected with door device U2 Y ends with the A ends with door device U3.
The output end OC and electric capacity C5 of over-current detection circuit one end, it is connected with door device U3 B ends, the electric capacity C5 other end Ground connection, is connected with door device U3 Y ends with the A ends with door device U4.
As shown in Figure 10, the output end RST and resistance R6 of reset detection circuit one end, diode D3 negative pole, two poles Pipe D4 negative pole connection, the resistance R6 other end is connected with resistance R7 one end, electric capacity C6 one end, with door device U4 B ends, electricity The resistance R7 other end is connected with diode D3 positive pole, diode D4 positive pole, electric capacity C6 other end ground connection.With door device U4's C-terminal and electric capacity C7 one end, 3.3V power supplys are connected, and are grounded with door device U4 D ends, electric capacity C7 other end ground connection, with door device U4 Y ends be connected with resistance R8 one end, one end, triode Q2 after the resistance R8 other end is in parallel with resistance R9 and electric capacity C8 The other end after base stage connection, resistance R9 and electric capacity C8 parallel connections is connected and is grounded with triode Q2 emitter stage；Triode Q2's Colelctor electrode is connected with resistance R10 one end, and by output end OE outputs level signals, resistance the R10 other end and 3.3V power supplys Connection.
Wave circuit 2 is sealed, the level signal for receiving fault detection module output end OE outputs, and it is defeated according to level signal Go out locking signal, the input of envelope wave circuit 2 is connected with the output end of fault detection module 1.As shown in figure 11, wave circuit 2 is sealed Including：The resistance R20 that one end is connected with the output end OE of fault detection module 1；One end is connected electric capacity with the resistance R20 other end C10, electric capacity C10 other end ground connection；The non-gate device F that input is connected with the resistance R20 other end, electric capacity C10 one end is non- Door device F output end is connected with resistance R21 one end, resistance R20 other end connection 3.3V power supplys, and exports locking signal extremely Enabling unit 3.
Enabling unit 3, the locking signal of the output end DRIVE-EN outputs for receiving envelope wave circuit 2, and according to block Signal is blocked to IGBT drive signals in frequency converter, and the input of enabling unit 3 is connected with sealing the output end of wave circuit 2, The output end of enabling unit 3 and the input of frequency converter are connected.
Protection device except the fault detection module 1 including the above, envelope wave circuit 2 and enabling unit 3 in addition to, in addition to for The arm processor 4 and DSP Processor 5 for the level signal that fault detection module 1 is exported are received respectively, and arm processor 4 receives event Hinder the level signal that detection module 1 is exported, and export the signal after processing to DSP Processor 5；DSP Processor 5 is received at ARM The level signal that device 4 and fault detection module 1 are exported is managed, and exports the signal after processing to enabling unit 3.Enabling unit 3 connects The output signal of DSP Processor 5 is received, software pulse blocking is carried out to frequency converter.
The specific course of work is as follows：
Three end points R, S, T of three phase mains provide required power supply, wherein transformer to transformer and frequency converter respectively The three phase mains received is subjected to transformer action and the power supply after transformation and safety return circuit, contactor formation loop is exported, when When safety return circuit is conducting state, loop is connected, and the coil of contactor obtains electric, and the normally opened contact closure of contactor, motor is obtained Electricity operation.
Equally, frequency converter carries out the three phase mains received after rectification, filtering and reversion reaction, according to frequency converter IGBT drive signals carry out the action of control contactor, so as to control the operation of motor.Due to transformer and safety return circuit, contact The loop of device formation belongs to hardware controls, fast response time of the action than the IGBT drive signals of frequency converter of hardware controls, When the IGBT drive signal control contactors of frequency converter, contactor has been realized in the control to motor.So, it is Prevent over-current phenomenon avoidance occur to the conflict that Motor Control is acted on, protection device is by sealing IGBT of the wave circuit 2 to frequency converter Drive signal is blocked.
Protection device detection frequency converter whether there is under-voltage, high pressure, overvoltage, module failure, excessively stream and the failure of reset；If In the presence of protection device exports locking signal to enabling unit by sealing wave circuit 2, and the IGBT drive signals of frequency converter are sealed Lock, the block that envelope wave circuit 2 is carried out is hardware lockout；Meanwhile, protection device is exported by arm processor 4 and DSP Processor 5 Locking signal is blocked to enabling unit 3 to the IGBT drive signals of frequency converter, and the block that DSP Processor 5 is carried out is software Pulse blocking；The response speed of hardware lockout will be faster than the response speed of software pulse blocking, be that hardware is first blocked, software is again Block, both be combined with each other, and not only effectively realize the block to frequency converter IGBT drive signals, while having reached redundancy Effect, improves the speed and reliability of block effect.When fault detection module 1 confirms fault-free, seal at wave circuit 2 and DSP Reason device 5 is lifted a blockade.
Safety return circuit, which is sent, outputs signal to contactor, and contactor closure, electric motor operation, frequency converter sends output signal There is the response time to contactor and lag behind safety return circuit, by the protection device of elevator frequency converter excessively stream frequency converter is sent to The output signal of contactor carries out envelope ripple, it is to avoid frequency converter receives reverse during transmission outputs signal to contactor Signal output excessively stream, and the elevator caused by frequency converter excessively stream are out of service.
The present invention, by connecting protection device to frequency converter and safety return circuit, protection device is provided with failure detector circuit, envelope Wave circuit and enabling unit, can effectively detect various fault messages and to the letter of the IGBT drive circuit output in frequency converter Number blocked, so that the working condition to frequency converter is effectively protected, improve service life, the safety of frequency converter Reliability and service behaviour.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn that the knot made under the enlightenment of the present invention Structure changes, and the technical schemes that are same or similar to the present invention are each fallen within protection scope of the present invention.

Claims (10)

1. a kind of frequency converter failure protection device, frequency converter and transformer are connected with power supply respectively, the frequency converter output signal The start and stop of motor are controlled to contactor, the transformer is connected with safety return circuit, contactor and by the safety return circuit To control the start and stop of motor, it is characterised in that the frequency converter and the safety return circuit are connected with the protection device respectively, The protection device includes：
Fault detection module, the output end for fault detect and outputs level signals, and input and the safety return circuit connects Connect, it includes undervoltage detection circuit, high-voltage detecting circuit, over-voltage detection circuit, module fault detecting circuit, over-current detection circuit With reset detection circuit, and it is connected each other with door successively；
Wave circuit is sealed, locking signal, the envelope wave circuit are exported for receiving the level signal, and according to the level signal Input be connected with the output end of the fault detection module；
Enabling unit, for receiving the locking signal that the output end of the envelope wave circuit is exported, and according to the locking signal pair The IGBT drive signals of the frequency converter are blocked, and the output end of the input of the enabling unit and the envelope wave circuit connects Connect, the output end of the enabling unit and the input of frequency converter are connected.
2. a kind of frequency converter failure protection device according to claim 1, it is characterised in that the protection device is also wrapped Include：
Arm processor, the level signal for receiving the fault detection module output, the input of the arm processor End is connected with the output end of the fault detection module；
DSP Processor, for receiving the output signal of the arm processor and the level of failure detector circuit output Signal, and output signal to the enabling unit, the output of the input of the DSP Processor and the failure detector circuit End, the output end connection of the arm processor, the output end of the DSP Processor are connected with the input of the enabling unit；
The enabling unit receives the signal of the DSP Processor output, and the IGBT drive signals progress to the frequency converter is soft Part pulse blocking.
3. a kind of frequency converter failure protection device according to claim 1, it is characterised in that the undervoltage detection circuit bag Include：Resistance R901, resistance R902 that one end is connected with control supply voltage CVD ends, one end and the other end of the resistance R901 The electric capacity C904 of connection, the other end of the electric capacity C904 is connected and is grounded with the other end of the resistance R902；One end and institute State the first diode group D901 of one end connection of resistance the R901 other end, the electric capacity C904, the first diode group The plus earth of D901 the first diode, the negative pole connection 3.3V power supplys of the second diode；One end is with the resistance R901's The other end, one end of the electric capacity C904, the resistance R906 of the common port connection of the first diode group；One end and benchmark electricity Press the resistance R912 of 3.3Vref connections, resistance R911 that one end is connected with the other end of the resistance R912, resistance R907, electricity Hold C902, the other end of the resistance R911 is connected and is grounded with the other end of the electric capacity C902；Negative pole and the resistance R906 other end connection, and the other end, one end of the resistance R911, the resistance R907 of positive pole and the resistance R912 One end, the comparator U901, the output end of the comparator U901 and the resistance R907 of one end connection of the electric capacity 901 The other end, resistance R934 one end connection；The resistance R933 that one end is connected with the other end of the resistance R934, the resistance R933 other end connection 3.3V power supplys, one end is connected with the other end of the resistance R934, one end of the resistance R933 Electric capacity C902, the electric capacity C902 other end ground connection, one end and the resistance R934 other end, the one of the resistance R933 End, one end of the electric capacity C902, the second diode group D902 of the output end LU connections of the undervoltage detection circuit, described The plus earth of two diode group D902 the 3rd diode, the negative pole connection 3.3V power supplys of the 4th diode；
The output end LU of the undervoltage detection circuit is connected with resistance R1 one end, the other end of the resistance R1 and resistance R2 and The base stage connection of one end, triode Q1 after electric capacity C1 is in parallel, the other end and described three after the resistance R2 and electric capacity C1 are in parallel Pole pipe Q1 emitter stage connection and ground connection, the colelctor electrode of the triode Q1 and resistance R3 one end, diode D1 negative pole connect Connect, the other end ground connection of the resistance R3.
4. a kind of frequency converter failure protection device according to claim 1, it is characterised in that the high-voltage detecting circuit bag Include：The resistance R114 that one end returns to module T103 A ends with safety, resistance R111 one end is connected, one end and the resistance The resistance R117 of R114 other end connection, the other end of the resistance R117 is connected with voltage suppressor D47 one end, described The voltage suppressor D47 other end is connected with voltage suppressor D48 one end, the other end and the electricity of the voltage suppressor D48 Hinder R120 one end, electric capacity C45 one end, four-way transistor G23 A ends connection；The other end of the resistance R111 and the peace The full D ends for returning to module T103, the other end of the resistance R120, the other end of the electric capacity C45, the four-way transistor G23 B ends connection, the C-terminal of the four-way transistor G23 is connected with resistance R137 one end, the D of the four-way transistor G23 End ground connection, the other end of the resistance R137 and resistance R163 one end, electric capacity C49 one end, schmitt inverter U12A Input is connected, and the schmitt inverter U12A and electric capacity C48 one end ,+3V power supplys are connected, and the electric capacity C48's is another End ground connection, the schmitt inverter U12A is provided with earth terminal, output end and the resistance R153 of the schmitt inverter U12A One end, Schottky diode D162 negative pole connection, the other end of the resistance R153 and electric capacity C57 one end, resistance R56 One end, schmitt inverter U12B input connection, the other end of the resistance R56 and the Schottky diode D162 Positive pole connection, the electric capacity C57 the other end ground connection；The output end of the schmitt inverter U12B and the one of resistance R134 End, light emitting diode L23 negative pole connection, the positive pole of the light emitting diode L23 are connected with resistance R131 one end, the electricity The resistance R131 other end is connected with+3V power supplys, and the other end of the resistance R134 is detected with resistance R160 one end, the high pressure The output end HV connections of circuit, the other end of the resistance R160 is connected with electric capacity C63 one end, and the electric capacity C63's is another End ground connection；
The output end HV of the high-voltage detecting circuit is connected with diode D2 negative pole, the positive pole of the diode D2 and described two Pole pipe D1 positive pole, resistance R4 one end, one end of C2 electric capacity and it is connected with door device U1 A ends, the other end of the resistance R4 Connect power supply, the other end ground connection of the C2 electric capacity.
5. a kind of frequency converter failure protection device according to claim 1, it is characterised in that the over-voltage detection circuit bag Include：Resistance R903, resistance R904 that one end is connected with control supply voltage DBVD ends；One end and the other end of the resistance R903 The electric capacity C905 of connection, the other end of the electric capacity C905 is connected and is grounded with the other end of the resistance R904；One end and institute State the 3rd diode group D903 of one end connection of resistance the R903 other end, the electric capacity C905, the 3rd diode group The plus earth of D903 the 5th diode, the negative pole connection 3.3V power supplys of the 6th diode；One end is with the resistance R903's The other end, one end of the electric capacity C905, the resistance R905 of the common port connection of the 3rd diode group；One end and benchmark electricity Press the resistance 909 of connection, resistance R908 that one end is connected with the other end of the resistance R909, resistance R910, electric capacity C903, institute The other end for stating resistance R908 is connected and is grounded with the other end of the electric capacity C903；The other end of negative pole and the resistance R905 It is connection and positive pole and one end of the resistance R908, the other end of the resistance R909, one end of the resistance R910, described The comparator U902 of one end connection of electric capacity 903, the output end of the comparator U902 and the other end, the electricity of the resistance R910 Hinder R936 one end connection；The resistance R935 that one end is connected with the other end of the resistance R936, the resistance R935's is another End connection 3.3V power supplys；The electric capacity C922 that one end is connected with the other end of the resistance R936, one end of the resistance R935, institute State electric capacity C922 other end ground connection；One end and the other end, one end of the resistance R935, the electric capacity of the resistance R936 C922 one end, the 4th diode group D904 of the output end LU connections of the undervoltage detection circuit, the 4th diode group The plus earth of D904 the 7th diode, the negative pole connection 3.3V power supplys of the 8th diode；
The output end OU and electric capacity C3 of the over-voltage detection circuit one end and it is connected with door device U1 B ends, the electric capacity C3's The other end is grounded, and is connected with door device U1 Y ends with the A ends with door device U2.
6. a kind of frequency converter failure protection device according to claim 1, it is characterised in that the module failure detection electricity Road includes：The resistance R211 that one end is connected with dc bus sampled point DC_BUS, the other end and resistance of the resistance R211 R213 one end, electric capacity C202 one end connection, the other end of the resistance R213 and resistance R215 one end, resistance R216 One end, comparator U204 positive pole connection, the other end of the resistance R215 are connected with reference voltage terminal REF, the electric capacity The C202 other end is connected with resistance R212 one end, resistance R214 one end；The other end and zero line N of the resistance R212, After the other end, electric capacity C204 one end, electric capacity C205 one end, the resistance R222 of the resistance R216 are in parallel with electric capacity C206 One end is connected；After the other end of the resistance R214 is in parallel with electric capacity C216 with negative pole, the resistance R232 of the comparator U204 One end connection；The output end of the comparator U204 is connected with resistance R233 one end, the other end of the resistance R233 with The other end, resistance R218 one end after the resistance R232 is in parallel with electric capacity C216 are connected, the other end of the resistance R218 It is connected with the positive pole of the other end, comparator U201 negative pole, comparator U202 of the electric capacity C205；The electric capacity C204's is another One end is connected with the positive pole of the comparator U201, resistance R219 one end, resistance R220 with one end after resistance R221 parallel connections, The other end of the resistance R219 is connected with reference voltage terminal REF；The other end after the resistance R222 is in parallel with electric capacity C206 The negative pole of the other end, the comparator U202 after in parallel with resistance R221 with the resistance R220 is connected, the comparator U202 is connected with power port+VCC and zero line N, the output end of the comparator U202 and the comparator U201 output end, Resistance R230 one end, four-way transistor PC202 B ends connection, the other end and the four-way of the resistance R230 are brilliant The A ends of body pipe, resistance R223 one end, electric capacity C219 one end connection, the other end of the resistance R223 is with resistance R240's One end, power port+VCC connections, the other end of the resistance R240 are connected with the other end of the electric capacity C219, the four-way Road transistor PC202 C-terminal is connected and is grounded with electric capacity C220 one end, the D ends of the four-way transistor PC202 and resistance R231 one end, resistance R239 one end connection, the other end ground connection of the resistance R231, the other end of the resistance R239 with The output end FO connections of the other end, module fault detecting circuit of the electric capacity C220；
The output end FO of the module fault detecting circuit is connected with resistance R5 one end, and the resistance R5 other end is with electric capacity C4's One end, it is connected with door device U2 B ends, is connected with door device U2 Y ends with the A ends with door device U3.
7. a kind of frequency converter failure protection device according to claim 1, it is characterised in that the over-current detection circuit bag Include：Supply voltage IU ends are connected with resistance R802 one end, resistance R803 one end, the other end and electric capacity of the resistance R802 C808 one end, comparator U801 negative pole connection, the positive pole of the comparator U801 are compared with electric capacity C803 one end, benchmark Electric current+Vref_OC positive pole connection, the other end ground connection of the electric capacity C803；The comparator U801 is connected with 15V power supplys, The negative pole of the 15V power supplys is connected with electric capacity C819 one end, the other end ground connection of the electric capacity C819, the 15V power supplys Positive pole is connected with electric capacity C820 one end, the other end ground connection of the electric capacity C820；The other end and electric capacity of the resistance R803 C809 one end, comparator U802 positive pole connection, the other end of the other end of the electric capacity C809 and the electric capacity C808 connect Connect and be grounded, negative pole and the benchmark of the comparator U802 compare electric current-Vref_OC negative pole, electric capacity C802 one end is connected, Electric capacity C802 other end ground connection；
Supply voltage IV ends are connected with resistance R804 one end, resistance R805 one end, the other end and the electricity of the resistance R804 Hold C810 one end, comparator U803 negative pole connection, the positive pole of the comparator U803 and electric capacity C805 one end, benchmark ratio Positive pole connection compared with electric current+Vref_OC, the other end ground connection of the electric capacity C805；The comparator U803 is connected with 15V electricity Source, the negative pole of the 15V power supplys is connected with electric capacity C817 one end, the other end ground connection of the electric capacity C817, the 15V power supplys Positive pole be connected with electric capacity C818 one end, the other end of electric capacity C818 ground connection；The other end of the resistance R805 and electricity Hold C811 one end, comparator U804 positive pole connection, the other end of the other end of the electric capacity C811 and the electric capacity C810 Connect and be grounded, the negative pole of the comparator U804 is compared electric current-Vref_OC negative pole, electric capacity C804 one end company with benchmark Connect, electric capacity C804 other end ground connection；
Supply voltage IW ends are connected with resistance R806 one end, resistance R807 one end, the other end and the electricity of the resistance R806 Hold C812 one end, comparator U805 negative pole connection, the positive pole of the comparator U805 and electric capacity C807 one end, benchmark ratio Positive pole connection compared with electric current+Vref_OC, the other end ground connection of the electric capacity C807；The comparator U805 is connected with 15V electricity Source, the negative pole of the 15V power supplys is connected with electric capacity C815 one end, the other end ground connection of the electric capacity C815, the 15V power supplys Positive pole be connected with electric capacity C816 one end, the other end of electric capacity C816 ground connection；The other end of the resistance R807 and electricity Hold C813 one end, comparator U806 positive pole connection, the other end of the other end of the electric capacity C813 and the electric capacity C812 Connect and be grounded, the negative pole of the comparator U806 is compared electric current-Vref_OC negative pole, electric capacity C806 one end company with benchmark Connect, electric capacity C806 other end ground connection；
The output end of the comparator U801 and comparator U802, U803, U804, U805, U806 output end, resistance R812 One end is connected；The other end of the resistance R812 is connected with resistance R811 one end, triode Q802 base stage, the resistance The R811 other end is connected with the colelctor electrode of+3.3V power supplys, the triode Q802, emitter stage and the electricity of the triode Q802 Hinder the input connection of R851 one end, resistance R852 one end, schmitt inverter UA07, the other end of the resistance R851 One end, the other end of the resistance R852 with electric capacity C841 are connected, and are grounded.Schmitt inverter UA07 output end and electricity Hinder R853 one end connection, the other end of the resistance R853 and electric capacity C814 one end, the output end OC of over-current detection circuit Connection, the other end ground connection of the electric capacity C814；
The output end OC and electric capacity C5 of the over-current detection circuit one end, it is connected with door device U3 B ends, the electric capacity C5 other end Ground connection, is connected with door device U3 Y ends with the A ends with door device U4.
8. a kind of frequency converter failure protection device according to claim 1, it is characterised in that the reset detection circuit bag Include：Power supply monitor U103, the VCC ends of the power supply monitor U103 are connected with 3.3V power supplys, the power supply monitor U103 GND ends ground connection, the RESET ends of the power supply monitor U103 carry out power reset work and with the output of reset detection circuit Hold RST connections；
The output end RST and resistance R6 of the reset detection circuit one end, diode D3 negative pole, diode D4 negative pole connect Connect, the resistance R6 other end is connected with resistance R7 one end, electric capacity C6 one end, with door device U4 B ends, the resistance R7 other end Positive pole, diode D4 positive pole with diode D3 are connected, electric capacity C6 other end ground connection.
The C-terminal with door device U4 and electric capacity C7 one end, 3.3V power supplys are connected, and the D ends with door device U4 are grounded, the electricity Hold C7 other end ground connection, the Y ends with door device U4 are connected with resistance R8 one end, the other end and resistance of the resistance R8 The base stage connection of one end, triode Q2 after R9 and electric capacity C8 are in parallel, the other end after the resistance R9 and electric capacity C8 are in parallel with The emitter stage connection of the triode Q2 and ground connection；The colelctor electrode of the triode Q2 is connected with resistance R10 one end, and is exported Level signal, the other end of the resistance R10 is connected with the 3.3V power supplys.
9. a kind of frequency converter failure protection device according to claim 1, it is characterised in that the envelope wave circuit includes：
The resistance R101 that one end is connected with the output end OE of the failure detector circuit；
Electric capacity C101, the electric capacity C101 that one end is connected with the other end of the resistance R101 other end ground connection；
Non-gate device F, the non-gate device F that input is connected with the other end of the resistance R101, one end of the electric capacity C101 Output end be connected with resistance R102 one end, the other end of the resistance R102 connects the 3.3V power supplys, and exports described Locking signal is to the enabling unit.
10. a kind of frequency converter, it is characterised in that protect dress including a kind of any described frequency converter failure of claim 1 to 9 Put.
CN201710304310.6A 2017-05-03 2017-05-03 Frequency converter fault protection device and frequency converter Active CN107069668B (en)

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