CN105490248A - Comprehensive protection circuit for active power filter (APF) - Google Patents
Comprehensive protection circuit for active power filter (APF) Download PDFInfo
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- CN105490248A CN105490248A CN201510841823.1A CN201510841823A CN105490248A CN 105490248 A CN105490248 A CN 105490248A CN 201510841823 A CN201510841823 A CN 201510841823A CN 105490248 A CN105490248 A CN 105490248A
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Abstract
The invention discloses and provides a comprehensive protection circuit for an active power filter (APF), and the comprehensive protection circuit is simple, stable, low in cost and easy to achieve. The comprehensive protection circuit comprises a feedback signal receiving circuit (1), an intelligent control circuit (2), a comprehensive arithmetic circuit (3), a failure indicating circuit (4) and an equipment off-network circuit (5), wherein the feedback signal receiving circuit (1) comprises a temperature detection circuit (11) and a feedback signal circuit (12); the temperature detection circuit (11) comprises a temperature arithmetic circuit (111) of A, B, C and N paths, a reference circuit (112) and a temperature control comprehensive circuit (113); the comprehensive arithmetic circuit is used for carrying out comprehensive arithmetic treatment on signals after being treated by the feedback signal receiving circuit and then correspondingly putting the signals into the intelligent control circuit, the failure indicating circuit and the equipment off-network circuit; the intelligent control circuit is used for outputting control signals; the failure indicating circuit is used for outputting failure indicating signals; and the equipment off-network circuit is used for outputting the signals to control breaker coil and IGBT driving.
Description
Technical field
The present invention relates to the general protective circuit of power compensation devices in power electronics control field, particularly one is used for the general protective circuit of active filter (APF).
Background technology
Along with the development of science and technology, the progress of society, electric energy cleans as one, fast, the controllable type energy is easily carried to be widely used in all trades and professions, become the resource that people depend on for existence, due to the input of rectification and frequency conversion equipment, while bringing great convenience to user, also pollution is caused to electrical network, for this reason, Active Power Filter-APF (APF) arises at the historic moment as Modern Electric Power Quality abatement equipment, little by means of its volume, capacity continuously adjustabe, the features such as compensation harmonic tracking velocity is fast, the main flow equipment of power quality controlling industry will be become, wherein, general protective circuit becomes the key technology of Active Power Filter-APF development, also be the stable foundation stone of Active Power Filter-APF device security, when there is various possible errors or people for misoperation, Active Power Filter-APF can be excised out from electrical network, turn off IGBT simultaneously, proterctive equipment is not damaged, protection electrical network is unaffected, ensure the safety of staff, ensure the safe operation of electrical network, comprehensive protection function becomes the important foundation that Active Power Filter-APF administers safely electrical network, thus, general protective circuit becomes and improves Active Power Filter-APF efficiency, the important content of stability, good control appliance comprehensive protection function just well can utilize Active Power Filter-APF.
For this reason; lot of domestic and international scholar proposes different integrated protection modes; such as use high accuracy conversion chip, or use multistage treatment method etc., but; considerably increase the cost of the Active Power Filter-APF using this technology like this; based on this, we have proposed a kind of general protective circuit for Active Power Filter-APF (APF), this circuit has simple and stable; cost is low, is easy to the advantages such as realization.
Summary of the invention
To be solved by this inventionly ask that carrying is overcome the deficiencies in the prior art, provide a kind of simple and stable, cost is low, is easy to the Active Power Filter-APF general protective circuit realized.
Technical scheme of the present invention is: a kind of general protective circuit for active filter, and it comprises feedback signal reception circuit, intelligent control circuit, comprehensive computing circuit, failure indicating circuit, equipment off-grid circuit, working power is provided by external circuit, described comprehensive computing circuit respectively with described feedback signal reception circuit, intelligent control circuit, failure indicating circuit, equipment off-grid circuit is electrically connected, and described feedback signal reception circuit comprises temperature sensing circuit, feedback signal circuit, described temperature sensing circuit comprises A, B, C, N tetra-tunnel temperature computing circuit, reference circuit, temperature control synthetic circuit, described A, B, C, N tetra-tunnel temperature computing circuit each road input anode connects external temperature transducing signal, described A, B, C, temperature computing circuit each road, N tetra-tunnel input negative terminal connects described reference circuit, described A, B, C, temperature computing circuit each road, N tetra-tunnel output connects described temperature control synthetic circuit input, and described temperature control synthetic circuit output connects described comprehensive computing circuit by described feedback signal circuit.
Described reference circuit comprises the resistance of two series connection, and one end connects external power source+5V end, and other end connecting circuit is held altogether, and described two resistant series points export reference signal RT and connect described A, B, C, N tetra-tunnel temperature computing circuit each road input negative terminal.
Described A, B, C, temperature computing circuit Zhong Ge road, N tetra-tunnel circuit structure is identical, include an operational integrated circuit and three resistance electric capacity, for A road: comprise the first operational integrated circuit, first resistance, second resistance, 3rd resistance, first electric capacity, the input anode of described operational integrated circuit connects one end of described first resistance, the other end of described first resistance connects external temperature transducing signal TA, the input negative terminal of described operational integrated circuit connects described reference circuit, described second resistor coupled in parallel is at the input anode of described operational integrated circuit and output, the output of described operational integrated circuit also connects one end of described 3rd resistance, one end of first electric capacity, the other end of described 3rd resistance connects external power source+5V end, the other end connecting circuit of described first electric capacity is held altogether, the output of described operational integrated circuit exports rear class desired signal OH-A to described temperature control synthetic circuit input.
Described temperature control synthetic circuit comprises the 5th integrated circuit, 6th integrated circuit, 7th integrated circuit, 8th integrated circuit, 9th integrated circuit, tenth integrated circuit, 11 integrated circuit, 12 integrated circuit, 16 resistance, 5th electric capacity, second switch, described 5th integrated circuit, 6th integrated circuit, 7th integrated circuit, the input B end of the 8th integrated circuit connects described A respectively successively, B, C, output signal OH-A in the temperature computing circuit of N tetra-tunnel, OH-B, OH-C, OH-N, described 5th integrated circuit, 6th integrated circuit, 7th integrated circuit, the input A of the 8th integrated circuit holds respectively connection signal HF-A successively, HF-B, HF-C, HF-N, the input A of described 9th integrated circuit of output connection of described 5th integrated circuit holds, the input B that described 6th integrated circuit connects described 9th integrated circuit holds, the input A of described tenth integrated circuit of output connection of described 7th integrated circuit holds, the input B of described tenth integrated circuit of output connection of described 8th integrated circuit holds, the output of described 9th integrated circuit, the output of described tenth integrated circuit connects described 11 integrated circuit input side a and b respectively successively, the output of described 11 integrated circuit connects one end of described 5th electric capacity and the RST end of described 12 integrated circuit, the other end connecting circuit of described 5th electric capacity is held altogether, the D end of described 12 integrated circuit, CLK holds connecting circuit to hold altogether, the SET end of described 12 integrated circuit connects described one end of 16 resistance and one end of described second switch respectively, the other end connecting circuit of described 16 resistance is held altogether, the other end of described second switch connects external power source+5V end, and the output of described 12 integrated circuit connects described comprehensive computing circuit by described feedback signal circuit.
Described comprehensive computing circuit comprises the 13 integrated circuit, 14 integrated circuit, described intelligent control circuit comprises the first switch, 6th electric capacity, CPU control signal, panel control signals, described failure indicating circuit comprises the 17 resistance, 18 resistance, the first transistor, described equipment off-grid circuit comprises the 19 resistance, 20 resistance, the first transistor, described comprehensive computing circuit connects described intelligent control circuit respectively, described failure indicating circuit, described equipment off-grid circuit, correspondence after signal synthesis calculation process after described feedback signal reception processing of circuit is inputed to described intelligent control circuit by described comprehensive computing circuit, described failure indicating circuit, described equipment off-grid circuit, described intelligent control circuit exports control signal, described failure indicating circuit exports fault indication signal, described equipment off-grid circuit output signal controls breaker coil and IGBT drives.
The invention has the beneficial effects as follows: because the present invention it it comprises feedback signal reception circuit, intelligent control circuit, comprehensive computing circuit, failure indicating circuit, equipment off-grid circuit, working power is provided by external circuit, described comprehensive computing circuit respectively with described feedback signal reception circuit, intelligent control circuit, failure indicating circuit, equipment off-grid circuit is electrically connected, and described feedback signal reception circuit comprises temperature sensing circuit, feedback signal circuit, described temperature sensing circuit comprises A, B, C, N tetra-tunnel temperature computing circuit, reference circuit, temperature control synthetic circuit, described A, B, C, N tetra-tunnel temperature computing circuit each road input anode connects external temperature transducing signal, described A, B, C, temperature computing circuit each road, N tetra-tunnel input negative terminal connects described reference circuit, described A, B, C, temperature computing circuit each road, N tetra-tunnel output connects described temperature control synthetic circuit input, and described temperature control synthetic circuit output connects described comprehensive computing circuit by described feedback signal circuit, and described comprehensive computing circuit comprises the 13 integrated circuit, 14 integrated circuit, described intelligent control circuit comprises the first switch, 6th electric capacity, CPU control signal, panel control signals, described failure indicating circuit comprises the 17 resistance, 18 resistance, the first transistor, described equipment off-grid circuit comprises the 19 resistance, 20 resistance, the first transistor, described comprehensive computing circuit connects described intelligent control circuit respectively, described failure indicating circuit, described equipment off-grid circuit, correspondence after the signal synthesis calculation process after described feedback signal reception processing of circuit is inputed to described intelligent control circuit by described comprehensive computing circuit, described failure indicating circuit, described equipment off-grid circuit, described intelligent control circuit exports control signal, and described failure indicating circuit exports fault indication signal, and described equipment off-grid circuit output signal controls breaker coil and IGBT drives.So the present invention is a kind of simple and stable, cost is low, is easy to the Active Power Filter-APF general protective circuit realized.
Accompanying drawing explanation
Fig. 1 is circuit theory schematic diagram of the present invention;
Fig. 2 is electrical block diagram of the present invention;
Fig. 3 is described A, B, C, N tetra-tunnel temperature computing circuit 111 structural representation;
Fig. 4 is described reference circuit 112 structural representation;
Fig. 5 is described temperature control synthetic circuit 113 structural representation;
Fig. 6 is described intelligent control circuit 2 structural representation;
Fig. 7 is described comprehensive computing circuit 3 structural representation;
Fig. 8 is described failure indicating circuit 4 structural representation;
Fig. 9 is described equipment off-grid circuit 5 structural representation.
Embodiment
As shown in Figures 1 to 9, the present invention it comprise feedback signal reception circuit 1, intelligent control circuit 2, comprehensive computing circuit 3, failure indicating circuit 4, equipment off-grid circuit 5, working power is provided by external circuit, described comprehensive computing circuit 3 respectively with described feedback signal reception circuit 1, intelligent control circuit 2, failure indicating circuit 4, equipment off-grid circuit 5 is electrically connected, and described feedback signal reception circuit 1 comprises temperature sensing circuit 11, feedback signal circuit 12, described temperature sensing circuit 11 comprises A, B, C, N tetra-tunnel temperature computing circuit 111, reference circuit 112, temperature control synthetic circuit 113, described A, B, C, N tetra-tunnel temperature computing circuit 111 each road input anode connects external temperature transducing signal, described A, B, C, N tetra-tunnel temperature computing circuit 111 each road input negative terminal connects described reference circuit 112, described A, B, C, temperature computing circuit 111 each road, N tetra-tunnel output connects described temperature control synthetic circuit 113 input, and described temperature control synthetic circuit 113 output connects described comprehensive computing circuit 3 by described feedback signal circuit 12.
Described reference circuit 112 comprises the resistance of two series connection, one end connects external power source+5V end, other end connecting circuit is held altogether, and described two resistant series points export reference signal RT and connect described A, B, C, N tetra-tunnel temperature computing circuit 111 each road input negative terminal.
Described A, B, C, temperature computing circuit 111 Zhong Ge road, N tetra-tunnel circuit structure is identical, include an operational integrated circuit and three resistance electric capacity, for A road: comprise the first operational integrated circuit U1, first resistance R1, second resistance R2, 3rd resistance R3, first electric capacity C1, the input anode of described operational integrated circuit U1 connects one end of described first resistance (R1), the other end of described first resistance R1 connects external temperature transducing signal TA, the input negative terminal of described operational integrated circuit U1 connects described reference circuit 112, described second resistance R2 is connected in parallel on input anode and the output of described operational integrated circuit U1, the output of described operational integrated circuit U1 also connects one end of described 3rd resistance R3, one end of first electric capacity C1, the other end of described 3rd resistance R3 connects external power source+5V end, the other end connecting circuit of described first electric capacity C1 is held altogether, the output of described operational integrated circuit U1 exports rear class desired signal OH-A to described temperature control synthetic circuit 113 input.
Described temperature control synthetic circuit 113 comprises the 5th integrated circuit U5, 6th integrated circuit U6, 7th integrated circuit U7, 8th integrated circuit U8, 9th integrated circuit U9, tenth integrated circuit U10, 11 integrated circuit U11, 12 integrated circuit U12, 16 resistance R16, 5th electric capacity C5, second switch S2, described 5th integrated circuit U5, 6th integrated circuit U6, 7th integrated circuit U7, the input B end of the 8th integrated circuit U8 connects described A respectively successively, B, C, output signal OH-A in N tetra-tunnel temperature computing circuit 111, OH-B, OH-C, OH-N, described 5th integrated circuit U5, 6th integrated circuit U6, 7th integrated circuit U7, the input A of the 8th integrated circuit U8 holds respectively connection signal HF-A successively, HF-B, HF-C, HF-N, the input A of the described 9th integrated circuit U9 of output connection of described 5th integrated circuit U5 holds, the input B that described 6th integrated circuit U6 connects described 9th integrated circuit U9 holds, the input A of the described tenth integrated circuit U10 of output connection of described 7th integrated circuit U7 holds, the input B of the described tenth integrated circuit U10 of output connection of described 8th integrated circuit U8 holds, the output of described 9th integrated circuit U9, the output of described tenth integrated circuit U10 connects described 11 integrated circuit U11 respectively successively and inputs side a and b, the output of described 11 integrated circuit U11 connects one end of described 5th electric capacity C5 and the RST end of described 12 integrated circuit U12, the other end connecting circuit of described 5th electric capacity C5 is held altogether, the D end of described 12 integrated circuit U12, CLK holds connecting circuit to hold altogether, the SET end of described 12 integrated circuit U12 connects one end of described 16 resistance R16 and one end of described second switch S2 respectively, the other end connecting circuit of described 16 resistance R16 is held altogether, the other end of described second switch S2 connects external power source+5V end, and the output of described 12 integrated circuit U12 connects described comprehensive computing circuit 3 by described feedback signal circuit 12.
Described comprehensive computing circuit 3 comprises the 13 integrated circuit U13, 14 integrated circuit U14, described intelligent control circuit 2 comprises the first switch S 1, 6th electric capacity C6, CPU control signal, panel control signals, described failure indicating circuit 4 comprises the 17 resistance R17, 18 resistance R18, the first transistor Q1, described equipment off-grid circuit 5 comprises the 19 resistance R19, 20 resistance R20, the first transistor Q1, described comprehensive computing circuit 3 connects described intelligent control circuit 2 respectively, described failure indicating circuit 4, described equipment off-grid circuit 5, after signal synthesis calculation process after described feedback signal reception circuit 1 processes by described comprehensive computing circuit 3, correspondence inputs to described intelligent control circuit 2, described failure indicating circuit 4, described equipment off-grid circuit 5, described intelligent control circuit 2 exports control signal, described failure indicating circuit 4 exports fault indication signal, described equipment off-grid circuit 5 output signal controls breaker coil and IGBT drives.
In the present embodiment, various feedback signal is carried out integrated treatment by feedback signal reception circuit, form the operable signal OC of late-class circuit, OV, OH, E, intelligent control circuit is by manual ringing, CPU control signal, panel control signals is processed into the operable signal of late-class circuit, above-mentioned signal synthesis calculation process is become fault indication signal FAULT and off-grid control signal C_NET by comprehensive computing circuit, then, fault indication signal LED_F is delivered to panel and carries out fault alarm by failure indicating circuit, equipment off-grid circuit converts signal C_NET to signal LOCK, and signal LOCK is delivered to respective circuit breakers control end and carry out the action of equipment off-grid, whole process completes and obtains integrated protection to Active Power Filter-APF, for the safe operation of Active Power Filter-APF is ready, thus ensure the stable operation of electrical network.
Reference circuit is by R4, R5 forms, form reference voltage signal RT, this signal RT is for four tunnel temperature computing circuits, this A road temperature computing circuit is by R1, R2, R3, C1 and integrated chip U1 forms, the temperature voltage signal T_A that external temperature sensor collects by this A road temperature computing circuit and reference signal RT compares, form the signal OH_A that late-class circuit needs, R2 is 1M resistance, OH_A signal is disturbed for preventing outer signals, signal OH_A and IGBT module feedback temperature signal HF_A is admitted to temperature control synthetic circuit, other three tunnels temperature computing circuit as shown in Figure 2, wherein, T_B is B phase temperature voltage signal, T_C is C phase temperature voltage signal, T_N is N phase temperature voltage signal, signal OH_B, OH_C, OH_N and feedback temperature signal HF_B, HF_C, HF_N is sent into temperature integrated circuit respectively.
Temperature control synthetic circuit is made up of U5, U6, U7, U8, U9, U10, U11, U12, S2, R16, C5, signal OH_A, OH_B, OH_C, OH_N in above-mentioned and signal HF_A, HF_B, HF_C, HF_N are carried out integrated treatment by this circuit, form the temperature feedback signal OH that late-class circuit needs, wherein, signal OHFA, OHFB, OHFC, OHFN, HAB, HCN, OH_1 is temperature control synthetic circuit inter-process signal.
Feedback signal circuit, signal OC, OV, E of mainly being fed back by peripheral circuit, give late-class circuit, and wherein, OC is current feedback signal, E is IGBT drived control feedback signal, and OV is overvoltage signal.
Intelligent control circuit, this circuit is by manual lockout circuit and CPU control signal IC_PWM_C, panel control signals M_C forms, wherein, manual lockout circuit is by S1, C1 forms, when for commissioning device, manual blockade IGBT, C1 is used for hand switch and disappears the effect of trembling, and form manual control signal H_C, IC_PWM_C is the feedback signal of equipment CPU control IGBT, whether the control signal sent for monitoring CPU is normal, M_C is panel control signals, whether come into operation for control appliance, this intelligent control circuit is by signal H_C, IC_PWM_C, M_C is processed into the operable signal of late-class circuit.
Comprehensive computing circuit, this circuit is made up of integrated chip U13, U14, U13 is used for combination current feedback signal OC, voltage feedback signal OV, IGBT temperature signal OH, IGBT drived control feedback signal E, OC, OV, OH, E are combined composite signal FAULT, FAULT is used for equipment fault instruction, and late-class circuit comprehensively uses, U14 is used for the signal C_NET comprehensively becoming to judge whether off-grid by signal H_C, IC_PWM_C, M_C, FAULT, wherein, U13 is integrated chip SN74HC20D, U14 is integrated chip SN74HC21D.
Failure indicating circuit, this circuit is made up of R17, R18, Q1, and wherein, R17 is 10K resistance, and R18 is 1K resistance, and Q1 is NPN triode, and higher level's fault-signal FAULT is processed into signal LED_F by this circuit, and signal LED_F is delivered to panel carries out faulty indication.
Equipment off-grid circuit, this electric routing resistance R19, resistance R20, Q2 composition, wherein, R20 is 1K resistance, R19 is 10K resistance, and Q2 is NPN triode, and the signal C_NET in foregoing circuit is processed into signal LOCK by this circuit, signal LOCK is for controlling breaker coil, and synchronous signal LOCK is for the driver output of control IGBT.
Claims (5)
1. for a general protective circuit of APF, it is characterized in that: it comprises feedback signal reception circuit (1), intelligent control circuit (2), comprehensive computing circuit (3), failure indicating circuit (4), equipment off-grid circuit (5), working power is provided by external circuit, described comprehensive computing circuit (3) respectively with described feedback signal reception circuit (1), intelligent control circuit (2), failure indicating circuit (4), equipment off-grid circuit (5) is electrically connected, and described feedback signal reception circuit (1) comprises temperature sensing circuit (11), feedback signal circuit (12), described temperature sensing circuit (11) comprises A, B, C, N tetra-tunnel temperature computing circuit (111), reference circuit (112), temperature control synthetic circuit (113), described A, B, C, N tetra-tunnel temperature computing circuit (111) each road input anode connects external temperature transducing signal, described A, B, C, temperature computing circuit (111) each road, N tetra-tunnel input negative terminal connects described reference circuit (112), described A, B, C, temperature computing circuit (111) each road, N tetra-tunnel output connects described temperature control synthetic circuit (113) input, and described temperature control synthetic circuit (113) output connects described comprehensive computing circuit (3) by described feedback signal circuit (12).
2. a kind of general protective circuit for APF according to claim 1; it is characterized in that: described reference circuit (112) comprises the resistance of two series connection; one end connects external power source+5V end; other end connecting circuit is held altogether, and the series connection point of two described resistance exports reference signal RT and connects described A, B, C, N tetra-each road input in tunnel temperature computing circuit (111) negative terminal.
3. a kind of general protective circuit for APF according to claim 2, it is characterized in that: described A, B, C, temperature computing circuit (111) Zhong Ge road, N tetra-tunnel circuit structure is identical, include an operational integrated circuit and three resistance electric capacity, for A road: comprise the first operational integrated circuit (U1), first resistance (R1), second resistance (R2), 3rd resistance (R3), first electric capacity (C1), the input anode of described operational integrated circuit (U1) connects one end of described first resistance (R1), the other end of described first resistance (R1) connects external temperature transducing signal TA, the input negative terminal of described operational integrated circuit (U1) connects described reference circuit (112), described second resistance (R2) is connected in parallel on input anode and the output of described operational integrated circuit (U1), the output of described operational integrated circuit (U1) also connects one end of described 3rd resistance (R3), one end of first electric capacity (C1), the other end of described 3rd resistance (R3) connects external power source+5V end, the other end connecting circuit of described first electric capacity (C1) is held altogether, the output of described operational integrated circuit (U1) exports rear class desired signal OH-A to described temperature control synthetic circuit (113) input.
4. a kind of general protective circuit for APF according to claim 3, is characterized in that: described temperature control synthetic circuit (113) comprises the 5th integrated circuit (U5), 6th integrated circuit (U6), 7th integrated circuit (U7), 8th integrated circuit (U8), 9th integrated circuit (U9), tenth integrated circuit (U10), 11 integrated circuit (U11), 12 integrated circuit (U12), 16 resistance (R16), 5th electric capacity (C5), second switch (S2), described 5th integrated circuit (U5), 6th integrated circuit (U6), 7th integrated circuit (U7), the input B end of the 8th integrated circuit (U8) connects described A respectively successively, B, C, output signal OH-A in N tetra-tunnel temperature computing circuit (111), OH-B, OH-C, OH-N, described 5th integrated circuit (U5), 6th integrated circuit (U6), 7th integrated circuit (U7), the input A of the 8th integrated circuit (U8) holds respectively connection signal HF-A successively, HF-B, HF-C, HF-N, the input A of described 9th integrated circuit (U9) of output connection of described 5th integrated circuit (U5) holds, the input B that described 6th integrated circuit (U6) connects described 9th integrated circuit (U9) holds, the input A of described tenth integrated circuit (U10) of output connection of described 7th integrated circuit (U7) holds, the input B of described tenth integrated circuit (U10) of output connection of described 8th integrated circuit (U8) holds, the output of described 9th integrated circuit (U9), the output of described tenth integrated circuit (U10) connects described 11 integrated circuit (U11) respectively successively and inputs side a and b, the output of described 11 integrated circuit (U11) connects one end of described 5th electric capacity (C5) and the RST end of described 12 integrated circuit (U12), the other end connecting circuit of described 5th electric capacity (C5) is held altogether, the D end of described 12 integrated circuit (U12), CLK holds connecting circuit to hold altogether, the SET end of described 12 integrated circuit (U12) connects described one end of 16 resistance (R16) and one end of described second switch (S2) respectively, the other end connecting circuit of described 16 resistance (R16) is held altogether, the other end of described second switch (S2) connects external power source+5V end, and the output of described 12 integrated circuit (U12) connects described comprehensive computing circuit (3) by described feedback signal circuit (12).
5. a kind of general protective circuit for APF according to claim 4, it is characterized in that: described comprehensive computing circuit (3) comprises the 13 integrated circuit (U13), 14 integrated circuit (U14), described intelligent control circuit (2) comprises the first switch (S1), 6th electric capacity (C6), CPU control signal, panel control signals, described failure indicating circuit (4) comprises the 17 resistance (R17), 18 resistance (R18), the first transistor (Q1), described equipment off-grid circuit (5) comprises the 19 resistance (R19), 20 resistance (R20), the first transistor (Q1), described comprehensive computing circuit (3) connects described intelligent control circuit (2) respectively, described failure indicating circuit (4), described equipment off-grid circuit (5), correspondence after signal synthesis calculation process after described feedback signal reception circuit (1) process is inputed to described intelligent control circuit (2) by described comprehensive computing circuit (3), described failure indicating circuit (4), described equipment off-grid circuit (5), described intelligent control circuit (2) exports control signal, described failure indicating circuit (4) exports fault indication signal, described equipment off-grid circuit (5) output signal controls breaker coil and IGBT drives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510841823.1A CN105490248B (en) | 2015-11-28 | 2015-11-28 | A kind of general protective circuit for APF |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510841823.1A CN105490248B (en) | 2015-11-28 | 2015-11-28 | A kind of general protective circuit for APF |
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| CN105490248A true CN105490248A (en) | 2016-04-13 |
| CN105490248B CN105490248B (en) | 2018-06-22 |
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| CN201510841823.1A Expired - Fee Related CN105490248B (en) | 2015-11-28 | 2015-11-28 | A kind of general protective circuit for APF |
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2015
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| CN105490248B (en) | 2018-06-22 |
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