CN114233582B - Special lightning protection plate for variable pitch - Google Patents
Special lightning protection plate for variable pitch Download PDFInfo
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- CN114233582B CN114233582B CN202111558362.9A CN202111558362A CN114233582B CN 114233582 B CN114233582 B CN 114233582B CN 202111558362 A CN202111558362 A CN 202111558362A CN 114233582 B CN114233582 B CN 114233582B
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- lightning protection
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- 238000004891 communication Methods 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 17
- 238000007599 discharging Methods 0.000 claims description 8
- 230000001052 transient effect Effects 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000007613 environmental effect Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000013022 venting Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/30—Lightning protection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
-
- 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
- H02H7/20—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 electronic equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/328—Blade pitch angle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The utility model provides a become special lightning protection board of oar, relates to the field of becoming oar, and this become special lightning protection board of oar includes: a power supply unit for supplying a voltage; the variable pitch working unit is used for controlling the running power of the unit and controlling the variable pitch work; the lightning protection plate unit is used for limiting the working voltage of the variable pitch working unit and preventing damage to the variable pitch working unit devices; the lightning protection sheet unit includes: the low-voltage protection circuit is used for preventing the working voltage of the variable pitch working unit from being lower than a lower limit threshold value; compared with the prior art, the invention has the beneficial effects that: the invention integrates the external control loop on a circuit board (lightning protection board unit), which reduces the system fault rate to a limited extent, is convenient for maintenance, overcomes the defects of piezoresistors, has high response speed (ns level), large transient power and low leakage current, and has the pulse peak current of 10/1000 mu s wave pulse power from 400W to 30KW reaching 544A and the breakdown voltage reaching 550V at the maximum.
Description
Technical Field
The invention relates to the field of variable pitch, in particular to a lightning protection plate special for variable pitch.
Background
The pitch system is a device installed in the hub to act as an air brake or to control the power of the unit operation by changing the blade angle (pitch).
The traditional variable-pitch electrical control, peripheral circuits are all installed in a variable-pitch control cabinet in a scattered manner by adopting independent lightning protection, relays and terminals, so that maintenance is not facilitated, and the fault rate is high. Secondly, the traditional scheme mainly adopts piezoresistors to inhibit overvoltage, static electricity and other phenomena existing in the circuit. When the energy of the piezoresistor exceeds the rated capacity thereof during the transient overvoltage suppression, the piezoresistor is damaged by overheat, mainly presents short circuit and open circuit, has a relatively slow response speed and needs to be improved.
Disclosure of Invention
The invention aims to provide a lightning protection plate special for pitch control, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a lightning protection sheet dedicated for pitch, comprising:
a power supply unit for supplying a voltage;
the variable pitch working unit is used for controlling the running power of the unit and controlling the variable pitch work;
the lightning protection plate unit is used for limiting the working voltage of the variable pitch working unit and preventing damage to the variable pitch working unit devices; the lightning protection sheet unit includes:
the low-voltage protection circuit is used for preventing the working voltage of the variable pitch working unit from being lower than a lower limit threshold value;
the high-voltage judging circuit is used for judging whether the voltage supplied by the power supply unit exceeds an upper limit threshold value or not, and sending a signal to the high-voltage compensating circuit when the voltage exceeds the upper limit threshold value;
the high-voltage compensation circuit is used for adding a resistor in a loop of the power supply unit for supplying the variable pitch working unit when receiving a signal, reducing the input voltage of the variable pitch working unit and finishing voltage compensation;
the super-threshold lightning protection circuit is used for providing a grounding loop for the variable-pitch working unit when the voltage of the variable-pitch working unit still exceeds an upper limit threshold after the voltage compensation is carried out on the voltage of the variable-pitch working unit, so that the variable-pitch working unit is prevented from being damaged; the super threshold lightning protection circuit comprises:
the safety chain protection module is used for discharging the overvoltage of the safety chain circuit into the ground;
the communication protection module is used for discharging overvoltage of the communication bus loop into the ground;
the external sensor protection module is used for discharging the overpressure in the external sensor loop into the ground;
the relay protection module is used for discharging overvoltage in a relay loop into the ground;
the output end of the power supply unit is connected with the input end of the low-voltage protection circuit, the input end of the high-voltage judging circuit and the first input end of the high-voltage compensation circuit, the output end of the high-voltage judging circuit is connected with the second input end of the high-voltage compensation circuit, the output end of the high-voltage compensation circuit is connected with the input end of the super-threshold lightning protection circuit and the input end of the pitch working unit, and the four modules of the safety chain protection module, the communication protection module, the external sensor protection module and the relay protection module are connected in parallel.
As still further aspects of the invention: the power supply unit comprises a transformer W, a rectifier T, a filter Y, a capacitor C2, a switch S2 and a resistor R4, wherein the input end of the transformer W is connected with 220V alternating current, one end of the output end of the transformer W is connected with a No. 1 pin of the rectifier T, the other end of the output end of the transformer W is connected with a No. 3 pin of the rectifier T, a No. 2 pin of the rectifier T is connected with a No. 2 pin of the filter Y, a No. 4 pin of the rectifier T is connected with a No. 1 pin of the filter Y, a No. 3 pin of the filter Y is connected with the switch S2 and the capacitor C2, the other end of the switch S2 is connected with the resistor R4, and the other end of the resistor R4 is connected with the input end of the low-voltage protection circuit, the input end of the high-voltage judgment circuit and the first input end of the high-voltage compensation circuit.
As still further aspects of the invention: the low-voltage protection circuit comprises a resistor R2, a resistor R3, a capacitor C1, a diode D1, a potentiometer RP1, an integrated circuit U1, a resistor R1, a relay J1, a diode D2 and a diode D3, wherein one end of the resistor R2 is connected with the output end of a power supply unit, the other end of the resistor R2 is connected with the resistor R3 and the anode of the diode D1, the other end of the resistor R3 is connected with the circuit cathode, the cathode of the diode D1 is connected with the capacitor C1 and the potentiometer RP1, the other end of the capacitor C1 is connected with the circuit cathode, the other end of the potentiometer RP1 is connected with the circuit cathode, the sliding end of the potentiometer RP1 is connected with a pin 5 of the integrated circuit U1, a pin 4 of the integrated circuit U1 is connected with the circuit cathode, a pin 2 of the integrated circuit U1 is connected with the cathode of the relay J1 through the resistor R1, the anode of the diode D2 and the anode of the diode D3 are connected with the anode of the circuit cathode, the other end of the relay J1 is connected with the circuit cathode, the anode of the diode D2 is connected with the circuit cathode, the cathode of the diode D3 is connected with the cathode of the integrated circuit U1, and the type is TWH 78.
As still further aspects of the invention: the high-voltage judging circuit comprises a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a diode D9, an inverter X1, an inverter X2 and an inverter X3, wherein one end of the resistor R5 is connected with the resistor R7, the resistor R9 and the output end of the power supply unit, the other end of the resistor R5 is connected with the negative electrode of the diode D4, the positive electrode of the diode D4 is connected with the input end of the resistor R6, the other end of the resistor R6 is grounded, the other end of the resistor R7 is connected with the negative electrode of the diode D5, the positive electrode of the diode D5 is connected with the negative electrode of the diode D6, the other end of the resistor R8 is grounded, the other end of the resistor R9 is connected with the negative electrode of the diode D7, the positive electrode of the diode D8 is connected with the negative electrode of the diode D8, the positive electrode of the diode D8 is connected with the negative electrode of the diode D9, and the positive electrode of the diode D9 is connected with the input end of the resistor R10.
As still further aspects of the invention: the high-voltage compensation circuit comprises a resistor R11, a resistor R12, a resistor R13, a switch S1, a MOS tube V2 and a MOS tube V3, wherein one end of the resistor R11 is connected with the D pole of the MOS tube V1 and the output end of a power supply unit, the other end of the resistor R11 is connected with the resistor R12, the S pole of the MOS tube V1 and the D pole of the MOS tube V2, the other end of the resistor R12 is connected with the resistor R13, the S pole of the MOS tube V2 and the D pole of the MOS tube V3, the other end of the resistor R13 is connected with the S pole of the MOS tube V3 and the switch S1, the other end of the switch S1 is connected with the input end of the super-threshold lightning protection circuit and the input end of the pitch working unit, the G pole of the MOS tube V1 is connected with the output end of the inverter X1, the G pole of the MOS tube V2 is connected with the output end of the inverter X2, and the G pole of the MOS tube V3 is connected with the output end of the inverter X3.
As still further aspects of the invention: the safety chain protection module comprises an integrated circuit ZGXM_M1J-24C, TVS tube array, wherein a safety chain signal is connected with the TVS tube array through the integrated circuit ZGXM_M1J-24C, and the other end of the TVS tube array is grounded.
As still further aspects of the invention: the communication protection module comprises an integrated circuit ZGXM_M1J-5C, TVS pipe array, the communication bus is connected with the TVS pipe array through the integrated circuit ZGXM_M1J-5C, and the other end of the TVS pipe array is grounded.
As still further aspects of the invention: the external sensor protection module comprises a TVS tube array, the external sensor is connected with the TVS tube array, and the other end of the TVS tube array is grounded.
As still further aspects of the invention: the relay protection module comprises a TVS tube array, a normally open contact loop of the relay is connected with the TVS tube array, and the other end of the TVS tube array is grounded.
Compared with the prior art, the invention has the beneficial effects that: the invention integrates the external control loop on a circuit board (lightning protection board unit), which reduces the system fault rate to a limited extent, is convenient for maintenance, overcomes the defects of piezoresistors, has high response speed (ns level), large transient power and low leakage current, and has the pulse peak current of 10/1000 mu s wave pulse power from 400W to 30KW reaching 544A and the breakdown voltage reaching 550V at the maximum.
Drawings
Fig. 1 is a schematic diagram of a lightning protection plate special for pitch control.
Fig. 2 is a circuit diagram of the power supply unit.
Fig. 3 is a circuit diagram of the low voltage protection circuit.
Fig. 4 is a circuit diagram of the high voltage determination circuit.
Fig. 5 is a circuit diagram of a high voltage compensation circuit.
Fig. 6 is a schematic diagram of a lightning protection circuit.
Fig. 7 is an internal structural diagram of the integrated circuit zgxm_m1j-24C.
Fig. 8 is a circuit diagram of a TVS tube array.
Fig. 9 is a circuit diagram of the relay protection module.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
Referring to fig. 1 and 6, a lightning protection plate special for pitch control, comprising:
a power supply unit 1 for supplying a voltage;
the variable pitch working unit 2 is used for controlling the running power of the unit and controlling the variable pitch work;
the lightning protection plate unit 3 is used for limiting the working voltage of the variable pitch working unit 2 and preventing the variable pitch working unit 2 from being damaged; the lightning protection sheet unit 3 includes:
a low voltage protection circuit 31 for preventing the operating voltage of the pitch operating unit 2 from being lower than a lower limit threshold;
a high voltage judging circuit 32 for judging whether the voltage supplied from the power supply unit 1 exceeds an upper threshold value, and when the voltage exceeds the upper threshold value, sending a signal to a high voltage compensating circuit 33;
the high-voltage compensation circuit 33 is configured to add a resistor to a loop of the power supply unit 1 for supplying the pitch working unit 2 when receiving a signal, reduce an input voltage of the pitch working unit 2, and complete voltage compensation;
the super-threshold lightning protection circuit 34 is used for providing a grounding loop for the variable-pitch working unit 2 when the voltage of the variable-pitch working unit 2 still exceeds an upper limit threshold after the voltage of the variable-pitch working unit 2 is subjected to voltage compensation, so that the variable-pitch working unit 2 is prevented from being damaged; the super-threshold lightning protection circuit 34 includes:
a safety chain protection module 341 for venting an overpressure of the safety chain circuit to ground;
the communication protection module 343 is configured to leak an overvoltage of the communication bus loop into the ground;
an external sensor protection module 344 for venting overpressure in the external sensor circuit to ground;
a relay protection module 342 for venting excess voltage in the relay circuit to ground;
the output end of the power supply unit 1 is connected with the input end of the low-voltage protection circuit 31, the input end of the high-voltage judging circuit 32 and the first input end of the high-voltage compensation circuit 33, the output end of the high-voltage judging circuit 32 is connected with the second input end of the high-voltage compensation circuit 33, the output end of the high-voltage compensation circuit 33 is connected with the input end of the super-threshold lightning protection circuit 34 and the input end of the pitch working unit 2, and the four modules of the safety chain protection module 341, the communication protection module 343, the external sensor protection module 344 and the relay protection module 342 are connected in parallel.
In particular embodiments: when the energy of the piezoresistor exceeds the rated capacity of the piezoresistor during the transient overvoltage suppression, the piezoresistor is damaged due to overheat, and the piezoresistor mainly has the defects of short circuit, open circuit and relatively slow response speed. The response speed of the lightning protection plate (the lightning protection plate unit 3) is high (ns level), the transient power is high, the leakage current is low, the 10/1000 mu s wave pulse power can reach 544A at maximum from 400W-30 KW pulse peak current, and the breakdown voltage can reach 550V at maximum. The working voltage of the pitch working unit 2 is higher than the upper threshold value, and the lightning protection circuit discharges voltage due to harmonic interference, static electricity release, lightning time, voltage and current in a line exceeding the tolerance value of the system and the like.
In this embodiment: referring to fig. 2, the power supply unit 1 includes a transformer W, a rectifier T, a filter Y, a capacitor C2, a switch S2, and a resistor R4, wherein an input end of the transformer W is connected to 220V ac, one end of an output end of the transformer W is connected to pin 1 of the rectifier T, the other end of the output end of the transformer W is connected to pin 3 of the rectifier T, pin 2 of the rectifier T is connected to pin 2 of the filter Y, pin 4 of the rectifier T is connected to pin 1 of the filter Y, pin 3 of the filter Y is connected to the switch S2 and the capacitor C2, pin 4 of the filter Y is connected to the other end of the capacitor C2, the other end of the switch S2 is connected to the resistor R4, and the other end of the resistor R4 is connected to the input end of the low voltage protection circuit 31, the input end of the high voltage determination circuit 32, and the first input end of the high voltage compensation circuit 33.
The transformer W converts 220V alternating current into low-voltage alternating current, the rectifier T converts the low-voltage alternating current into direct current, the filter Y carries out filtering treatment on the direct current, and the switch S2 is a circuit main switch.
In this embodiment: referring to fig. 3, the low voltage protection circuit 31 includes a resistor R2, a resistor R3, a capacitor C1, a diode D1, a potentiometer RP1, an integrated circuit U1, a resistor R1, a relay J1, a diode D2, and a diode D3, wherein one end of the resistor R2 is connected to the power supply unit 1, the other end of the resistor R2 is connected to the resistor R3, the positive end of the diode D1 is connected to the circuit negative electrode, the negative end of the diode D1 is connected to the capacitor C1, the other end of the capacitor C1 is connected to the circuit negative electrode, the other end of the potentiometer RP1 is connected to the circuit negative electrode, the sliding end of the potentiometer RP1 is connected to pin 5 of the integrated circuit U1, pin 4 of the integrated circuit U1 is connected to the circuit negative electrode, pin 2 of the integrated circuit U1 is connected to the negative electrode through the resistor R1, pin 1 of the integrated circuit U1 is connected to the relay J1, the negative electrode of the diode D2, the positive electrode of the diode D3 is connected to the negative electrode of the relay J1, the positive electrode of the diode D2 is connected to the circuit negative electrode of the diode D2, the other end of the resistor D2 is connected to the circuit negative electrode, the other end of the resistor is connected to the negative electrode of the diode D3 is connected to the negative electrode of the circuit 78, and the circuit is of the model 78.
When the voltage at the pin 5 of the integrated circuit TWH8778 reaches 1.6V, the pin 1 of the integrated circuit TWH8778 outputs a high level, so that the relay J1 is electrified to work, the power supply unit 1 is controlled to supply voltage to the switch S1 of the line where the pitch working unit 2 is positioned to be closed, and the power supply unit 1 supplies power to the pitch working unit 2; when the voltage at pin 5 of the integrated circuit TWH8778 does not reach 1.6V, the power supply unit 1 is not supplying power to the pitch work unit 2, preventing the pitch work unit 2 from operating doubtfully due to the low voltage. The 1.6V voltage is the acquisition voltage, and the position of the potentiometer RP1 is regulated and controlled at the beginning, so that the pin 5 of the integrated circuit U1 is 1.6V when the voltage VCC supplied by the power supply unit 1 is at the lower limit threshold value.
In this embodiment: referring to fig. 4, the high voltage determination circuit 32 includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a diode D9, an inverter X1, an inverter X2, and an inverter X3, wherein one end of the resistor R5 is connected to the resistor R7, the resistor R9, and an output end of the power supply unit 1, the other end of the resistor R5 is connected to a negative electrode of the diode D4, an anode of the diode D4 is connected to the resistor R6 and an input end of the inverter X1, the other end of the resistor R6 is grounded, the other end of the resistor R7 is connected to a negative electrode of the diode D5, an anode of the diode D5 is connected to a negative electrode of the diode D6, an input end of the inverter X2, the other end of the resistor R8 is grounded, the other end of the resistor R9 is connected to a negative electrode of the diode D7, the anode of the diode D7 is connected to a negative electrode of the diode D8, and the anode of the diode D8 is connected to the negative electrode of the diode D9 is connected to the positive electrode of the diode D10.
When the voltage output by the power supply unit 1 does not exceed the upper limit threshold, all the voltage stabilizing diodes D4, D5 and D7 are not conducted, the input ends of the inverters X1, X2 and X3 are all low level, and the output ends are all high level; when the voltage output by the power supply unit 1 exceeds the upper limit threshold, if the voltage exceeds 10% -20%, the zener diode D4 is turned on; when the voltage exceeds 20% -30%, the voltage stabilizing diodes D5 and D6 are also conducted; when the voltage exceeds 30%, the voltage stabilizing diodes D7, D8 and D9 are also conducted; for example, the input terminals of the inverters X1 and X2 are at high level, and the input terminal of the inverter X3 is at low level, so that the output terminals of the inverters X1 and X2 are at low level, and the output terminal of the inverter X3 is at high level.
In this embodiment: referring to fig. 5, the high voltage compensation circuit 33 includes a resistor R11, a resistor R12, a resistor R13, a switch S1, a MOS tube V2, and a MOS tube V3, wherein one end of the resistor R11 is connected to the D pole of the MOS tube V1 and the output end of the power supply unit 1, the other end of the resistor R11 is connected to the resistor R12, the S pole of the MOS tube V1, and the D pole of the MOS tube V2, the other end of the resistor R12 is connected to the resistor R13, the S pole of the MOS tube V2, and the D pole of the MOS tube V3, the other end of the resistor R13 is connected to the S pole of the MOS tube V3 and the switch S1, the other end of the switch S1 is connected to the input end of the super-threshold lightning protection circuit 34 and the input end of the pitch operation unit 2, the G pole of the MOS tube V1 is connected to the output end of the inverter X1, the G pole of the MOS tube V2 is connected to the output end of the inverter X2, and the G pole of the MOS tube V3 is connected to the output end of the inverter X3.
When the voltage output by the power supply unit 1 does not exceed the upper limit threshold, the inverters X1, X2 and X3 all output high level, so that the MOS tube V1, the MOS tube V2 and the MOS tube V3 are all conducted, the resistor R11, the resistor R12 and the resistor R13 are respectively connected with the MOS tube V1, the MOS tube V2 and the MOS tube V3 in parallel, the circuit resistance is extremely small, and the output voltage VCC of the power supply unit 1 can be considered to directly supply power to the pitch working unit 2; when the voltage VCC output by the power supply unit 1 exceeds the upper limit threshold, the voltage VCC exceeds 20% -30%, at this time, the output ends of the inverters X1 and X2 are at low level, the output end of the inverter X3 is at high level, at this time, the resistor R13 and the MOS tube V3 are connected in parallel, the resistor R11 and the resistor R12 are added into a loop of the power supply unit 1 for supplying power to the pitch working unit 2, the voltage VCC is reduced through the resistor R11 and the resistor R12, so that the voltage output to the pitch working unit 2 is lower than the upper limit threshold, the circuit still operates normally when the voltage exceeds the upper limit threshold, and the loss of stopping operation of the pitch working unit 2 is reduced.
When the voltage VCC output by the power supply unit 1 exceeds the upper limit threshold by more than 30%, the power supply unit 1 outputs the voltage VCC to supply power to the variable pitch working unit 2 through the resistor R11, the resistor R12 and the resistor R13, and if the voltage reduced by the three resistors exceeds the upper limit threshold, the super-threshold lightning protection circuit 34 works, and the internal TVS tube is connected to the ground to prevent damage to the variable pitch working unit 2.
In this embodiment: referring to fig. 6, 7 and 8, the safety chain protection module 341 includes an integrated circuit zgxm_m1j-24C, TVS pipe array, and the safety chain signal is connected to the TVS pipe array through the integrated circuit zgxm_m1j-24C, and the other end of the TVS pipe array is grounded.
The internal structure of the integrated circuit ZGXM_M1J-24C is shown as 4, when the pitch working unit 2 works internally, the main control chip sends a safety chain signal for pitch, the pitch is damaged due to overlarge safety chain signal, therefore, the safety chain signal is collected through the integrated circuit ZGXM_M1J-24C, TVS pipe array, and when the safety chain signal is overlarge, the TVS pipe array is conducted, so that the safety chain signal is grounded through the TVS pipe array, and the pitch is prevented from being damaged.
In this embodiment: referring to fig. 6, 7 and 8, the communication protection module 343 includes an integrated circuit zgxm_m1j-5C, TVS pipe array, the communication bus is connected to the TVS pipe array through the integrated circuit zgxm_m1j-5C, and the other end of the TVS pipe array is grounded.
When the variable pitch working unit 2 works, interaction with external information can exist, for example, through a Canopen communication bus, in order to prevent external communication devices from being damaged due to overlarge output information interaction voltage, the communication bus is connected with a TVS tube array through an integrated circuit ZGXM_M1J-5C, and voltage discharge is completed when the output information interaction voltage is overlarge or the TVS tube array is conducted to the ground. The internal structure of the integrated circuit ZGXM_M1J-24C and the internal structure of the integrated circuit ZGXM_M1J-5C are similar, and the integrated circuit ZGXM_M1J-24C is manufactured by adopting medium light.
In this embodiment: referring to fig. 6 and 8, the external sensor protection module 344 includes a TVS tube array, and the external sensor is connected to the TVS tube array, and the other end of the TVS tube array is grounded.
The variable pitch working unit 2 obtains environmental information through a plurality of external sensors, and in order to prevent the input voltage of the external sensors from being too large, the main control chip of the variable pitch working unit 2 is damaged, and the variable pitch working unit is grounded through a TVS tube array, so that the voltage is prevented from being too large. The single external sensor is connected with the main control chip and the TVS tube array, when the environmental voltage signal is normal, the external sensor transmits the environmental voltage signal for the main control chip, and when the environmental voltage signal is overlarge, the TVS tube array is grounded, so that the environmental voltage signal output to the main control chip is discharged from the ground, and the device is not damaged. And the single external sensor is grounded through one TVS, so that when the single external sensor fails, the operation of other external sensors is not influenced to output an environmental voltage signal to the main control chip.
In this embodiment: referring to fig. 6, 8 and 9, the relay protection module 342 includes a TVS tube array, and a normally open contact loop of the relay is connected to the TVS tube array, and the other end of the TVS tube array is grounded.
The pitch working unit 2 is provided with a plurality of relays, the relays are electrified to work, and the normally open contact loop is controlled to be closed, so that the circuit where the normally open contact loop of the relays is positioned is conducted, and meanwhile, the loop is connected with the TVS tube array to prevent the normally open contact loop of the relays from being excessively high in voltage.
The working principle of the invention is as follows: when the power supply unit 1 supplies power normally, the power supply unit 1 directly supplies power to the pitch working unit 2, and the pitch working unit 2 is powered on to work; when the power supply of the power supply unit 1 is lower than the lower limit threshold, the low-voltage protection circuit 31 breaks a loop between the pitch working unit 2 and the power supply unit 1, so that the pitch working unit 2 is prevented from working doubtfully under the low-voltage condition; when the power supply voltage VCC of the power supply unit 1 exceeds the upper limit threshold (detected by the high voltage judging circuit 32), if the power supply voltage VCC is compensated by the high voltage compensating circuit 33 and becomes normal power supply, the power supply voltage VCC is compensated by the voltage compensation and then the power supply voltage VCC is supplied to the pitch working unit 2; the upper threshold is still exceeded after the supply voltage VCC has undergone voltage compensation, at which time the over-threshold lightning protection circuit 34 operates to drain the voltage through ground.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (9)
1. The utility model provides a become special lightning protection board of oar which characterized in that:
this become special lightning protection board of oar includes:
a power supply unit for supplying a voltage;
the variable pitch working unit is used for controlling the running power of the unit and controlling the variable pitch work;
the lightning protection plate unit is used for limiting the working voltage of the variable pitch working unit and preventing damage to the variable pitch working unit devices; the lightning protection sheet unit includes:
the low-voltage protection circuit is used for preventing the working voltage of the variable pitch working unit from being lower than a lower limit threshold value;
the high-voltage judging circuit is used for judging whether the voltage supplied by the power supply unit exceeds an upper limit threshold value or not, and sending a signal to the high-voltage compensating circuit when the voltage exceeds the upper limit threshold value;
the high-voltage compensation circuit is used for adding a resistor in a loop of the power supply unit for supplying the variable pitch working unit when receiving a signal, reducing the input voltage of the variable pitch working unit and finishing voltage compensation;
the super-threshold lightning protection circuit is used for providing a grounding loop for the variable-pitch working unit when the voltage of the variable-pitch working unit still exceeds an upper limit threshold after the voltage compensation is carried out on the voltage of the variable-pitch working unit, so that the variable-pitch working unit is prevented from being damaged; the super threshold lightning protection circuit comprises:
the safety chain protection module is used for discharging the overvoltage of the safety chain circuit into the ground;
the communication protection module is used for discharging overvoltage of the communication bus loop into the ground;
the external sensor protection module is used for discharging the overpressure in the external sensor loop into the ground;
the relay protection module is used for discharging overvoltage in a relay loop into the ground;
the output end of the power supply unit is connected with the input end of the low-voltage protection circuit, the input end of the high-voltage judging circuit and the first input end of the high-voltage compensation circuit, the output end of the high-voltage judging circuit is connected with the second input end of the high-voltage compensation circuit, the output end of the high-voltage compensation circuit is connected with the input end of the super-threshold lightning protection circuit and the input end of the pitch working unit, and the four modules of the safety chain protection module, the communication protection module, the external sensor protection module and the relay protection module are connected in parallel.
2. The lightning protection plate special for variable pitch according to claim 1, wherein the power supply unit comprises a transformer W, a rectifier T, a filter Y, a capacitor C2, a switch S2 and a resistor R4, wherein an input end of the transformer W is connected with 220V ac, one end of an output end of the transformer W is connected with pin 1 of the rectifier T, the other end of the output end of the transformer W is connected with pin 3 of the rectifier T, pin 2 of the rectifier T is connected with pin 2 of the filter Y, pin 4 of the rectifier T is connected with pin 1 of the filter Y, pin 3 of the filter Y is connected with a switch S2 and a capacitor C2, pin 4 of the filter Y is connected with the other end of the capacitor C2, the other end of the switch S2 is connected with a resistor R4, and the other end of the resistor R4 is connected with an input end of the low voltage protection circuit, an input end of the high voltage judgment circuit and a first input end of the high voltage compensation circuit.
3. The lightning protection plate special for pitch control according to claim 1, wherein the low-voltage protection circuit comprises a resistor R2, a resistor R3, a capacitor C1, a diode D1, a potentiometer RP1, an integrated circuit U1, a resistor R1, a relay J1, a diode D2 and a diode D3, one end of the resistor R2 is connected with an output end of the power supply unit, the other end of the resistor R2 is connected with the resistor R3 and an anode of the diode D1, the other end of the resistor R3 is connected with a circuit cathode, the cathode of the diode D1 is connected with the capacitor C1, the other end of the capacitor C1 is connected with the circuit cathode, the other end of the potentiometer RP1 is connected with the circuit cathode, the sliding end of the potentiometer RP1 is connected with a pin 5 of the integrated circuit U1, a pin 4 of the integrated circuit U1 is connected with the circuit cathode, a pin 2 of the integrated circuit U1 is connected with the circuit cathode through the resistor R1, a pin 1 of the integrated circuit U1 is connected with the cathode of the relay J1, the cathode of the diode D2 is connected with the anode of the diode D3, the other end of the relay J1 is connected with the circuit cathode, the cathode of the diode D2 is connected with the anode of the diode D3, and the cathode of the integrated circuit is connected with the type of the diode is of the circuit model 78.
4. The lightning protection board for pitch control according to claim 1, wherein the high voltage judging circuit comprises a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a diode D9, an inverter X1, an inverter X2, and an inverter X3, one end of the resistor R5 is connected to the resistor R7, the resistor R9, and an output terminal of the power supply unit, the other end of the resistor R5 is connected to the negative electrode of the diode D4, the positive electrode of the diode D4 is connected to the resistor R6 and an input terminal of the inverter X1, the other end of the resistor R6 is grounded, the other end of the resistor R7 is connected to the negative electrode of the diode D5, the positive electrode of the diode D5 is connected to the negative electrode of the diode D6, the other end of the resistor R8 is grounded, the other end of the resistor R9 is connected to the negative electrode of the diode D7, the positive electrode of the diode D7 is connected to the input terminal of the inverter X2, and the positive electrode of the negative electrode of the diode D8 is connected to the positive electrode of the diode D9 is connected to the negative electrode of the diode D10.
5. The lightning protection plate special for pitch control according to claim 4, wherein the high-voltage compensation circuit comprises a resistor R11, a resistor R12, a resistor R13, a switch S1, a MOS tube V2 and a MOS tube V3, one end of the resistor R11 is connected with the D pole of the MOS tube V1 and the output end of the power supply unit, the other end of the resistor R11 is connected with the resistor R12, the S pole of the MOS tube V1 and the D pole of the MOS tube V2, the other end of the resistor R12 is connected with the resistor R13, the S pole of the MOS tube V2 and the D pole of the MOS tube V3, the other end of the resistor R13 is connected with the S pole of the MOS tube V3 and the switch S1, the other end of the switch S1 is connected with the input end of the super-threshold circuit and the input end of the pitch control unit, the G pole of the MOS tube V1 is connected with the output end of the inverter X1, the G pole of the MOS tube V2 is connected with the output end of the inverter X2, and the G pole of the MOS tube V3 is connected with the output end of the inverter X3.
6. The special lightning protection board for pitch control according to claim 1, wherein the safety chain protection module comprises an integrated circuit zgxm_m1j-24C, TVS pipe array, the safety chain signal is connected to the TVS pipe array through the integrated circuit zgxm_m1j-24C, and the other end of the TVS pipe array is grounded.
7. The special lightning protection board for pitch control according to claim 1, wherein the communication protection module comprises an integrated circuit zgxm_m1j-5C, TVS pipe array, the communication bus is connected to the TVS pipe array through the integrated circuit zgxm_m1j-5C, and the other end of the TVS pipe array is grounded.
8. The special lightning protection board for pitch control according to claim 1, wherein the external sensor protection module comprises a TVS tube array, the external sensor is connected to the TVS tube array, and the other end of the TVS tube array is grounded.
9. The lightning protection plate special for variable pitch according to claim 1, wherein the relay protection module comprises a TVS tube array, a normally open contact loop of the relay is connected with the TVS tube array, and the other end of the TVS tube array is grounded.
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| CN202111558362.9A CN114233582B (en) | 2021-12-17 | 2021-12-17 | Special lightning protection plate for variable pitch |
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| CN202111558362.9A CN114233582B (en) | 2021-12-17 | 2021-12-17 | Special lightning protection plate for variable pitch |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05199745A (en) * | 1992-01-16 | 1993-08-06 | Mitsubishi Electric Corp | Insulation type power-supply circuit |
| CN202023691U (en) * | 2011-03-31 | 2011-11-02 | 重庆科凯前卫风电设备有限责任公司 | Processing circuit of incremental coder of variable-pitch motor |
| CN205689360U (en) * | 2016-05-18 | 2016-11-16 | 苏州能健电气有限公司 | A kind of direct-drive type naval counterpart variable blade control system |
| DE102019106746A1 (en) * | 2019-03-18 | 2020-09-24 | Wobben Properties Gmbh | Severe weather early warning procedure and severe weather early warning device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3899984B2 (en) * | 2002-04-09 | 2007-03-28 | 富士電機デバイステクノロジー株式会社 | Overvoltage protection circuit |
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2021
- 2021-12-17 CN CN202111558362.9A patent/CN114233582B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05199745A (en) * | 1992-01-16 | 1993-08-06 | Mitsubishi Electric Corp | Insulation type power-supply circuit |
| CN202023691U (en) * | 2011-03-31 | 2011-11-02 | 重庆科凯前卫风电设备有限责任公司 | Processing circuit of incremental coder of variable-pitch motor |
| CN205689360U (en) * | 2016-05-18 | 2016-11-16 | 苏州能健电气有限公司 | A kind of direct-drive type naval counterpart variable blade control system |
| DE102019106746A1 (en) * | 2019-03-18 | 2020-09-24 | Wobben Properties Gmbh | Severe weather early warning procedure and severe weather early warning device |
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| CN114233582A (en) | 2022-03-25 |
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Address after: 214000 Building A, Standard Workshop Phase II, Runzhou Road, Industrial Transformation Cluster, Huishan District, Wuxi City, Jiangsu Province Patentee after: Jiangsu Naquan Hongyuan New Energy Technology Co.,Ltd. Address before: 214404 No. 95, Yueshan Road, Yuecheng Town, Jiangyin City, Wuxi City, Jiangsu Province Patentee before: JIANGYIN HONGYUAN NEW ENERGY TECHNOLOGY CO.,LTD. |