CN114448291A - Double-drive variable pitch motor band-type brake safety control system - Google Patents
Double-drive variable pitch motor band-type brake safety control system Download PDFInfo
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- CN114448291A CN114448291A CN202111587267.1A CN202111587267A CN114448291A CN 114448291 A CN114448291 A CN 114448291A CN 202111587267 A CN202111587267 A CN 202111587267A CN 114448291 A CN114448291 A CN 114448291A
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- type brake
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- 230000007547 defect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an AC motor
- H02P3/26—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an AC motor by combined electrical and mechanical braking
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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
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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
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/60—Control system actuates means
- F05D2270/62—Electrical actuators
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Braking Arrangements (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a double-drive variable pitch motor band-type brake safety control system, which comprises a driver 1, a driver 2, a variable pitch motor 1 and a variable pitch motor 2, wherein the driver 2 is connected with the driver; the driver 1 is connected with the variable pitch motor 1 and the variable pitch motor 2 through the contracting brake loop 1, and the driver 2 is connected with the variable pitch motor 2 and the variable pitch motor 1 through the contracting brake loop 2. Aiming at the double-drive electric variable pitch system, the single shaft drives the two variable pitch motors by the two drivers, then drives the blades together to adjust the pitch, a motor band-type brake redundancy control scheme is integrated in each driver, and the external circuit of the driver only needs to connect the band-type brakes of the two drivers in parallel without additionally adding band-type brake redundancy control related devices, so that the cost can be greatly saved.
Description
Technical Field
The invention belongs to the technical field of new energy and control, and particularly relates to a double-drive variable pitch motor contracting brake safety control system.
Background
The variable pitch control system is an important component of the wind generating set, mainly plays a role in adjusting the input power of a wind wheel and performing pneumatic braking, and plays an important role in safe and stable operation of a fan. For a small megawatt wind turbine generator, a single-shaft single driver is generally adopted to drive a single motor, but with the improvement of the power level of the wind turbine generator, the load of the blade root of the wind turbine generator is greatly increased, a variable pitch system needs to adopt a new single-shaft dual-drive control mode, namely, two drivers are arranged on one shaft to respectively drive two motors, the single-point stress of a variable pitch bearing is effectively reduced, the risk of tooth breakage of the bearing is reduced, and the service life of the bearing is prolonged.
With the competitive incandescence of the offshore wind power market, the price of the offshore wind power complete machine is also continuously reduced, and the offshore non-integrated pitch control system cannot meet the requirement of the offshore market at the present stage due to higher price, so a new control mode is needed to reduce the cost of the pitch control system. The double-drive integrated variable pitch system is a new control mode, each shaft comprises a driver 1, a driver 2, a motor 1 and a motor 2, a switching power supply, a charger, a band-type brake and the like are integrated into the drivers, if two drivers of one shaft adopt the same driver with a single-drive integrated type, the risk that the current variable pitch motor cannot be released when a single variable pitch driver is damaged or a band-type brake loop of the variable pitch motor fails exists, and the current shaft of a fan is locked in place exists; if the non-integrated type same external band-type brake safety redundancy control is adopted, the complexity of the variable pitch system is greatly increased, the price of the variable pitch system is increased, and the safety and the economy are not facilitated.
Therefore, for the integrated dual-drive pitch system, a new contracting brake control method is urgently needed to further improve the safety and the economy of the pitch system.
Disclosure of Invention
Aiming at the defects in the prior art, the double-drive variable pitch motor contracting brake safety control system provided by the invention solves the safety problem caused by a contracting brake-free redundancy control method in the prior art or the problem that a contracting brake redundancy safety circuit needs to be added externally.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a double-drive variable pitch motor contracting brake safety control system comprises a driver 1, a driver 2, a variable pitch motor 1 and a variable pitch motor 2; the driver 1 is connected with the variable pitch motor 1 and the variable pitch motor 2 through the contracting brake loop 1, and the driver 2 is connected with the variable pitch motor 2 and the variable pitch motor 1 through the contracting brake loop 2.
Further: the band-type brake loop 1 comprises a direct-current bus DC-Link1, a switching power supply 1, a switching power supply 2, a band-type brake control unit 1, a band-type brake driving unit 1, an inter-anode diode D1 and a reverse diode D2 at the output end of the band-type brake; the direct current bus DC-Link1 is connected with power supply 1 and power supply 2 respectively, power supply 1 connects band-type brake drive unit 1, power supply 2 connects band-type brake control unit 1, band-type brake drive unit 1 and band-type brake control unit 1 are connected, the positive pole of band-type brake drive 1 is connected with backward diode D2's positive pole and the one end of positive negative pole diode D1 respectively, backward diode D2's negative pole output band-type brake control signal B1+, the negative pole of band-type brake drive 1 is connected and is exported band-type brake control signal B1 with the other end of positive negative pole diode D1 respectively, band-type brake control signal B1+ and band-type brake control signal B1-the band-type brake of control pitch motor 1 is loosened.
Further: the other end of the diode D1 between the positive electrode and the negative electrode of the backward diode D2 is connected in parallel to the spark suppressor 1.
Further: the band-type brake loop 2 comprises a direct-current bus DC-Link2, a switching power supply 3, a switching power supply 4, a band-type brake control unit 2, a band-type brake driving unit 2, an inter-anode diode D3 and a reverse diode D4 at the output end of the band-type brake; the direct current bus DC-Link2 is connected with power 3 and power 4 respectively, power 3 connects band-type brake drive unit 2, power 4 connects band-type brake control unit 2, band-type brake drive unit 2 and band-type brake control unit 2 are connected, the positive pole of band-type brake drive 2 is connected with backward diode D4's positive pole and the one end of positive negative pole diode D3 respectively, backward diode D4's negative pole output band-type brake control signal B2+, the negative pole of band-type brake drive 2 is connected and is exported band-type brake control signal B2 with the other end of positive negative pole diode D3 respectively, band-type brake control signal B2+ and band-type brake control signal B2-the band-type brake of control pitch motor 2 is loosened.
Further: the spark suppressor 2 is connected in parallel between the anode of the backward diode D4 and the other end of the inter-anode diode D3.
Further: the band-type brake control signal B1+ is connected with the band-type brake control signal B2+ in parallel, and the band-type brake control signal B1-is connected with the band-type brake control signal B2-in parallel.
Further: the switching power supply 1, the switching power supply 2, the switching power supply 3 and the switching power supply 4 comprise a switching power supply module and a switching power supply, the switching power supply 1 and the switching power supply 2 can be redundant to each other, and the switching power supply 3 and the switching power supply 4 can be redundant to each other.
Further: the output voltage of the band-type brake driving unit 1 and the band-type brake driving unit 2 is 24V, 230V or other voltages.
The invention has the beneficial effects that:
1) aiming at the double-drive electric variable pitch system, the single shaft drives two variable pitch motors by using two drivers, then drives the blades together to adjust the pitch, a motor band-type brake redundancy control scheme is integrated in each driver, and the external circuit of the driver only needs to connect the band-type brakes of the two drivers in parallel without additionally adding band-type brake redundancy control related devices, so that the cost can be greatly saved;
2) according to the invention, because the number of external devices of the motor band-type brake control loop of the variable pitch system is reduced, the complexity of the motor band-type brake control loop of the variable pitch system is greatly reduced, and the failure rate of the variable pitch system is further reduced;
3) according to the invention, as the band-type brake loops of the band-type brake driving unit 1 and the band-type brake driving unit 2 form redundant control, namely, any one of the driver 1 and the driver 2 normally outputs a brake release instruction, the pitch control motor 1 and the pitch control motor 2 can be controlled to release the motor band-type brake at the same time, the probability that the wind turbine generator cannot be retracted due to the failure of the band-type brake control loop is reduced, and the safety and reliability of the wind turbine generator are improved.
Drawings
FIG. 1 is a schematic view of safety control of a single-drive variable-pitch electric brake;
fig. 2 is a schematic view of safety control of a dual-drive variable-pitch electric band-type brake.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, in a common single-drive scheme, a single shaft only includes 1 driver and 1 pitch motor, and a brake circuit of the driver includes a DC-Link DC bus, 1 or more switching power supplies (i.e., a switching power supply 1 and a switching power supply 2), a brake control unit, a brake driving unit, and a diode D1 between positive and negative electrodes.
As shown in fig. 2, a double-drive variable pitch motor contracting brake safety control system comprises a driver 1, a driver 2, a variable pitch motor 1 and a variable pitch motor 2; the driver 1 is connected with the variable pitch motor 1 and the variable pitch motor 2 through the contracting brake loop 1, and the driver 2 is connected with the variable pitch motor 2 and the variable pitch motor 1 through the contracting brake loop 2.
The band-type brake loop 1 comprises a direct-current bus DC-Link1, a switching power supply 1, a switching power supply 2, a band-type brake control unit 1, a band-type brake driving unit 1, an inter-anode diode D1 and a reverse diode D2 at the output end of the band-type brake; the direct current bus DC-Link1 is connected with power supply 1 and power supply 2 respectively, power supply 1 connects band-type brake drive unit 1, power supply 2 connects band-type brake control unit 1, band-type brake drive unit 1 and band-type brake control unit 1 are connected, the positive pole of band-type brake drive 1 is connected with backward diode D2's positive pole and the one end of positive negative pole diode D1 respectively, backward diode D2's negative pole output band-type brake control signal B1+, the negative pole of band-type brake drive 1 is connected and is exported band-type brake control signal B1 with the other end of positive negative pole diode D1 respectively, band-type brake control signal B1+ and band-type brake control signal B1-the band-type brake of control pitch motor 1 is loosened.
The band-type brake loop 2 comprises a direct-current bus DC-Link2, a switching power supply 3, a switching power supply 4, a band-type brake control unit 2, a band-type brake driving unit 2, an inter-anode diode D3 and a reverse diode D4 at the output end of the band-type brake; the direct current bus DC-Link2 is connected with power 3 and power 4 respectively, power 3 connects band-type brake drive unit 2, power 4 connects band-type brake control unit 2, band-type brake drive unit 2 and band-type brake control unit 2 are connected, the positive pole of band-type brake drive 2 is connected with backward diode D4's positive pole and the one end of positive negative pole diode D3 respectively, backward diode D4's negative pole output band-type brake control signal B2+, the negative pole of band-type brake drive 2 is connected and is exported band-type brake control signal B2 with the other end of positive negative pole diode D3 respectively, band-type brake control signal B2+ and band-type brake control signal B2-the band-type brake of control pitch motor 2 is loosened.
And (3) connecting B1+ of the brake driving unit 1 in parallel with B2+ of the brake driving unit 2, and connecting B1-of the brake driving unit 1 in parallel with B2-of the brake driving unit 2 outside the driver.
When the contracting brake control command of the contracting brake driving unit 1 is output normally, but the contracting brake driving unit 2 fails or cannot output the contracting brake control command normally, 24V voltage exists between B1+ and B1-, the output voltage between B2+ and B2-is lower than 24V, at this time, because a backward diode D4 exists, the 24V voltage between B1+ and B1-is not input into the contracting brake driving unit 2 through a diode D4, but directly acts on terminals B2+ and B2-, namely the 24V voltage between B2+ and B2-is equal to the 24V voltage between B1+ and B1-, and the contracting brakes of the variable pitch motor 1 and the variable pitch motor 2 can be opened at the same time.
Similarly, when the contracting brake control command of the contracting brake driving unit 2 is normally output, but the contracting brake driving unit 1 is in failure or cannot normally output the contracting brake control command, 24V voltage is between B2+ and B2-, and the output voltage between B1+ and B1-is lower than 24V, at this time, because the reverse diode D2 exists, the 24V voltage between B2+ and B2-is not input into the contracting brake driving unit 1 through the diode D2, but is directly applied to the terminals B1+ and B1-, that is, the 24V voltage between B1+ and B1-is equal to the 24V voltage between B2+ and B2-, the contracting brakes of the variable pitch motor 1 and the variable pitch motor 2 can be simultaneously turned on.
In summary, between the contracting brake driving unit 1 and the contracting brake driving unit 2, as long as the contracting brake control command output of one driver is normal, the contracting brakes of the two pitch motors can be simultaneously opened.
The spark suppressor 1 is required to be incorporated between the positive-negative diode D1 and the positive electrode of the reverse diode D2, so as to eliminate redundant energy, protect the brake driving unit 1, and improve the brake response rate of the pitch motor 1.
The spark suppressor 2 is required to be incorporated between the positive-negative diode D3 and the positive electrode of the reverse diode D4, so as to eliminate redundant energy, protect the brake driving unit 2, and improve the brake response rate of the pitch motor 2.
The switching power supply 1, the switching power supply 2, the switching power supply 3 and the switching power supply 4 comprise a switching power supply module and a switching power supply, the switching power supply 1 and the switching power supply 2 can be redundant to each other, and the switching power supply 3 and the switching power supply 4 can be redundant to each other.
The output voltage of the band-type brake driving unit 1 and the band-type brake driving unit 2 is 24V, 230V or other voltages.
Aiming at the double-drive electric variable pitch system, the single shaft drives two variable pitch motors by using two drivers, then drives the blades together to adjust the pitch, a motor band-type brake redundancy control scheme is integrated in each driver, and the external circuit of the driver only needs to connect the band-type brakes of the two drivers in parallel without additionally adding band-type brake redundancy control related devices, so that the cost can be greatly saved;
according to the invention, due to the reduction of external devices of the contracting brake control loop of the motor of the variable pitch system, the complexity of the contracting brake control loop of the variable pitch motor is greatly reduced, and the fault rate of the variable pitch system is further reduced;
according to the invention, as the band-type brake loops of the band-type brake driving unit 1 and the band-type brake driving unit 2 form redundant control, namely, any one of the driver 1 and the driver 2 normally outputs a brake release instruction, the pitch control motor 1 and the pitch control motor 2 can be controlled to release the motor band-type brake at the same time, the probability that the wind turbine generator cannot be retracted due to the failure of the band-type brake control loop is reduced, and the safety and reliability of the wind turbine generator are improved.
Claims (8)
1. A double-drive variable pitch motor contracting brake safety control system is characterized by comprising a driver 1, a driver 2, a variable pitch motor 1 and a variable pitch motor 2; the driver 1 is connected with the variable pitch motor 1 and the variable pitch motor 2 through the contracting brake loop 1, and the driver 2 is connected with the variable pitch motor 2 and the variable pitch motor 1 through the contracting brake loop 2.
2. The double-drive variable pitch motor brake safety control system according to claim 1, wherein the brake loop 1 comprises a direct current bus DC-Link1, a switching power supply 1, a switching power supply 2, a brake control unit 1, a brake driving unit 1, an inter-positive and inter-negative diode D1 and a reverse diode D2 at the output end of the brake; the direct current bus DC-Link1 is connected with power supply 1 and power supply 2 respectively, power supply 1 connects band-type brake drive unit 1, power supply 2 connects band-type brake control unit 1, band-type brake drive unit 1 and band-type brake control unit 1 are connected, the positive pole of band-type brake drive 1 is connected with backward diode D2's positive pole and the one end of positive negative pole diode D1 respectively, backward diode D2's negative pole output band-type brake control signal B1+, the negative pole of band-type brake drive 1 is connected and is exported band-type brake control signal B1 with the other end of positive negative pole diode D1 respectively, band-type brake control signal B1+ and band-type brake control signal B1-the band-type brake of control pitch motor 1 is loosened.
3. The double-drive pitch motor brake safety control system as claimed in claim 2, wherein the other end of the diode D1 between the positive pole and the negative pole of the reverse diode D2 is connected in parallel with a spark suppressor 1.
4. The double-drive variable pitch motor brake safety control system according to claim 3, wherein the brake loop 2 comprises a direct current bus DC-Link2, a switching power supply 3, a switching power supply 4, a brake control unit 2, a brake driving unit 2, an inter-positive and inter-negative diode D3 and a reverse diode D4 at the output end of the brake; the direct current bus DC-Link2 is connected with power 3 and power 4 respectively, power 3 connects band-type brake drive unit 2, power 4 connects band-type brake control unit 2, band-type brake drive unit 2 and band-type brake control unit 2 are connected, the positive pole of band-type brake drive 2 is connected with backward diode D4's positive pole and the one end of positive negative pole diode D3 respectively, backward diode D4's negative pole output band-type brake control signal B2+, the negative pole of band-type brake drive 2 is connected and is exported band-type brake control signal B2 with the other end of positive negative pole diode D3 respectively, band-type brake control signal B2+ and band-type brake control signal B2-the band-type brake of control pitch motor 2 is loosened.
5. The double-drive pitch motor brake safety control system as claimed in claim 4, wherein the other end of the diode D3 between the positive pole and the negative pole of the reverse diode D4 is connected in parallel with a spark suppressor 2.
6. The double-drive variable pitch motor brake safety control system according to claim 4, wherein the brake control signal B1+ is connected in parallel with a brake control signal B2+, and the brake control signal B1-is connected in parallel with a brake control signal B2-.
7. The double-drive variable pitch motor brake safety control system according to claim 4, wherein the switching power supply 1, the switching power supply 2, the switching power supply 3 and the switching power supply 4 comprise a switching power supply module and a switching power supply, the switching power supply 1 and the switching power supply 2 are redundant to each other, and the switching power supply 3 and the switching power supply 4 are redundant to each other.
8. The double-drive variable pitch motor brake safety control system according to claim 4, wherein the output voltage of the brake driving unit 1 and the output voltage of the brake driving unit 2 are 24V, 230V or other voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111587267.1A CN114448291B (en) | 2021-12-23 | 2021-12-23 | Dual-drive variable-pitch motor band-type brake safety control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111587267.1A CN114448291B (en) | 2021-12-23 | 2021-12-23 | Dual-drive variable-pitch motor band-type brake safety control system |
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| CN114448291A true CN114448291A (en) | 2022-05-06 |
| CN114448291B CN114448291B (en) | 2024-06-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116707354A (en) * | 2023-07-28 | 2023-09-05 | 深圳众城卓越科技有限公司 | Band-type brake control circuit of multi-drive variable pitch system and band-type brake control method thereof |
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| CN116707354A (en) * | 2023-07-28 | 2023-09-05 | 深圳众城卓越科技有限公司 | Band-type brake control circuit of multi-drive variable pitch system and band-type brake control method thereof |
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| CN114448291B (en) | 2024-06-04 |
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