CN116677571A - Wind wheel rotating speed measuring device, system and overspeed protection method - Google Patents
Wind wheel rotating speed measuring device, system and overspeed protection method Download PDFInfo
- Publication number
- CN116677571A CN116677571A CN202310964212.0A CN202310964212A CN116677571A CN 116677571 A CN116677571 A CN 116677571A CN 202310964212 A CN202310964212 A CN 202310964212A CN 116677571 A CN116677571 A CN 116677571A
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- wind wheel
- rotating speed
- slip ring
- measuring device
- wind
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 230000005856 abnormality Effects 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- 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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
-
- 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
- F05B2270/10—Purpose of the control system
- F05B2270/101—Purpose of the control system to control rotational speed (n)
- F05B2270/1011—Purpose of the control system to control rotational speed (n) to prevent overspeed
-
- 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
- F05B2270/327—Rotor or generator speeds
-
- 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
Landscapes
- Engineering & Computer Science (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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a measuring device, a system and an overspeed protection method for the rotating speed of a wind wheel, wherein the device comprises a detection loop, a loop conducting brush, a power supply cable and a signal output cable, wherein the power supply cable is connected with the loop conducting brush; the detection loop is assembled on the rotating shaft of the slip ring rotor; the signal output end of the signal output cable is connected with the variable pitch system to transmit the rotating speed pulse signal. According to the invention, a pulse signal is obtained through the alternate contact of the ring conductive brush with the insulating tape and the conductive ring; the variable pitch system counts and converts the input pulse signals to obtain the rotating speed of the wind wheel, and the overspeed variable pitch system controls the feathering protection of the blades, so that the measured signals are high in stability, strong in anti-interference capability and low in delay, and the overspeed problem of the wind turbine generator is effectively solved.
Description
Technical Field
The invention relates to the technical field of monitoring and controlling of wind power generation devices, in particular to a wind wheel rotating speed measuring device, a wind wheel rotating speed measuring system and an overspeed protection method.
Background
With the development of society, the problems of energy shortage, environmental pollution and the like are continuously highlighted, and clean energy such as solar energy, wind energy, potential energy and the like is continuously developed and utilized by human beings. Wind power generation is used as an important clean energy source, and is rapidly developed, and the newly-increased installation quantity is continuously improved.
However, with the lifting of the wind power installation amount, serious accidents such as machine burning, machine turning and the like occur at the time of a fan accident, and serious accidents such as machine turning and the like are frequent, wherein 'wind wheel overspeed' is the most main cause for inducing machine turning. Aiming at the problem of overspeed of a wind wheel, the existing solution in the industry at present is to measure a rotating speed signal through a generator encoder (a doubly-fed machine set) or a slip ring encoder (a direct-driven machine set), the signal is transmitted to a main control system of the wind wheel, the main control system of the wind wheel judges whether the wind wheel overspeed or not, and the overspeed signal is transmitted to a variable-pitch system in a hub through a communication slip ring, and the variable-pitch system controls the feathering protection of a blade. However, the existing mode has the following obvious defects:
1. the encoder signals are easy to be interfered in a complex electromagnetic environment of the engine room, and the interference signals can cause misjudgment of a main control system of the fan;
2. the overspeed signal transmission route is long, the signal delay is large and the signal is easy to interfere in the middle, so that the overspeed signal can not be received by the pitching system or can be received by mistake, and the situation that the feathering is not feathering or is mis-feathering is caused;
3. the existing mode is regulated and controlled completely by means of signals of a main control system, if the main control system fails, when the wind wheel overspeed, the pitch system cannot receive overspeed signals, and untimely feathering protection occurs, so that accidents are caused.
Disclosure of Invention
In order to solve the problems, the invention provides a measuring device, a system and an overspeed protection method for the rotating speed of a wind wheel, which are characterized in that a pulse electric signal is generated through a special slip ring loop design, the rotating speed of a slip ring is obtained through conversion of pulse signal frequency, the real-time rotating speed of the wind wheel is obtained, when the measured rotating speed exceeds a safety threshold value, a variable pitch system controls a blade feathering, so that the rotating speed of the wind wheel is reduced, overspeed of the wind wheel is avoided, and the safety of a unit is ensured.
The invention provides a measuring device for the rotating speed of a wind wheel, which comprises the following specific technical scheme:
the measuring device of the wind wheel rotating speed is used for a wind generating set and comprises a detection loop, a loop conducting brush, a power supply cable and a signal output cable, wherein the power supply cable is connected with one end of the loop conducting brush, a contact is arranged at the other end of the loop conducting brush and is in contact with the detection loop, one end of the signal output cable is communicated with the inner side of the detection loop, and the detection loop comprises insulating strips and conducting rings which are arranged in a staggered mode.
Further, the insulating strips and the conducting rings are uniformly distributed and staggered on the detection loop.
The invention also provides a measuring system of the rotating speed of the wind wheel, which comprises a wind generating set, a variable pitch system and the measuring device of the rotating speed of the wind wheel;
the detection loop of the measuring device of the wind wheel rotating speed is assembled on the fan slip ring of the wind generating set;
the signal output end of the signal output cable of the wind wheel rotating speed measuring device is connected with the signal input end of the variable pitch system, and the rotating speed pulse signal is transmitted.
Further, the fan slip ring comprises a slip ring rotor, a slip ring stator, a front end bearing and a rear end bearing, wherein the slip ring stator is sleeved outside the slip ring rotor, and the front end bearing and the rear end bearing are respectively arranged at the front end and the rear end of the slip ring rotor in the slip ring stator.
Furthermore, a mounting bracket is arranged in the slip ring stator, and the tail end of the ring conductive brush of the measuring device for the rotating speed of the wind wheel is fixed on the mounting bracket.
Furthermore, a signal output cable of the measuring device for the rotating speed of the wind wheel is connected into the variable pitch system through the slip ring rotor in a heavy load mode.
The invention provides an overspeed protection method of wind wheel rotation speed, which is based on the measurement system of wind wheel rotation speed and comprises the following steps:
s1: driving a wind generating set to work, and acquiring a rotating speed pulse signal through alternating contact of a ring conductive brush with an insulating belt and a conductive ring of the detection loop;
s2: calculating the receiving number of the rotating speed pulse signals in the set unit time;
s3: performing rotation speed conversion based on the number of the received rotation speed pulse signals to obtain the rotation speed of the detection loop;
s4: and judging whether the set overspeed threshold value is reached or exceeded by the variable pitch system according to the rotating speed of the detection loop, and if so, controlling the feathering protection of the blades by the variable pitch system.
Further, in step S3, the rotation speed conversion is specifically as follows:
acquiring the number of insulating strips on the detection loop;
based on the number of the rotational speed pulse signals received in the set unit time;
and calculating and obtaining the ratio of the number of the rotating speed pulse signals to the number of the insulating belts in real time to obtain the rotating speed of the wind wheel.
Further, the set unit time is 1min.
Further, in step S4, the method further includes: and judging the effectiveness of the rotating speed pulse signal, and when the angles of all blades of the variable pitch system are simultaneously lower than the angle limit value, reporting measurement abnormality if the rotating speed pulse is too low, and protecting shutdown.
The beneficial effects of the invention are as follows:
through set up the detection circuit in wind turbine generator system's fan sliding ring inside, the detection circuit comprises insulating tape and the conducting ring that evenly stagger set up, when the pivot rotated, acquire pulse signal through the ring conducting brush, and then become oar system and judge whether the wind wheel exceeds speed, control the protection of paddle feathering during overspeed, effectively solve wind turbine generator system overspeed problem, simultaneously have stability height, interference killing feature is strong, the time delay is low based on this structure survey signal characteristics, the detection circuit is set up in the fan sliding ring inside, the mounting means is the same with other circuit in the sliding ring, the cost is reduced, the practicality is stronger.
The measured signal has the characteristics of high stability, strong anti-interference capability, low delay and the like. The invention has low cost and strong practicability, and can solve the industry difficult problem of overspeed wind wheel.
Drawings
Fig. 1 is a schematic diagram of a structure of a rotation speed measuring device.
Fig. 2 is a schematic view of the structure of the rotation speed measuring device inside the slip ring.
Fig. 3 is a schematic diagram illustrating the measurement principle.
Reference numerals illustrate: the device comprises a 1-detection loop, a 2-insulating belt, a 3-conducting ring, a 4-ring conducting brush, a 5-mounting bracket, a 6-power supply cable, a 7-signal output cable, an 8-slip ring rotor, a 9-slip ring stator, a 10-front end bearing, a 11-rear end bearing and a 12-slip ring rotor side heavy load.
Detailed Description
In the following description, the technical solutions of the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship conventionally put in use of the product of the present invention as understood by those skilled in the art, merely for convenience of describing the present invention and simplifying the description, and is not indicative or implying that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for understanding as indicating or implying a relative importance.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
The embodiment 1 of the invention discloses a measuring device for the rotating speed of a wind wheel, which is shown in fig. 1, and has the following specific structure:
the measuring device of the wind wheel rotating speed is used for a wind generating set and comprises a detection loop 1, a loop conducting brush 4, a power supply cable 6 and a signal output cable;
one end of the power supply cable 6 is connected with a signal voltage power supply, the other end of the power supply cable 6 is connected with one end of the ring conductive brush 4, and the other end of the ring conductive brush 4 is provided with a contact which is contacted with the detection loop 1;
the detection loop 1 comprises insulating strips 2 and conducting rings 3 which are arranged in a staggered manner and have different conductivities, one end of the signal output cable is communicated with the inner side of the detection loop 1, specifically, one end of the signal output cable is connected with the inner side of the conducting ring 3, and the other end of the signal output cable is connected with a slip ring rotor side heavy load 12.
In this embodiment, the insulating strips 2 and the conductive rings 3 are uniformly distributed and staggered on the detection loop 1.
The insulating tape 2 is made of a material with good insulating property, so that the transmission of signal voltage can be effectively blocked, and the conducting ring 3 is made of a material with good conducting property;
the ring conductive brush 4 can be made of the same material as that of other slide brushes of the fan slip ring, for example, an alloy material with good conductive performance.
Example 2
The embodiment 2 of the invention discloses a measuring system for the rotating speed of a wind wheel, which is shown in fig. 2, and has the following specific structure:
the measuring system of the wind wheel rotating speed comprises a wind generating set, a variable pitch system and the measuring device of the wind wheel rotating speed in the embodiment 1;
the measuring device of the rotating speed of the wind wheel is assembled on a fan slip ring of the wind generating set, namely the detection loop 1 is arranged on a rotating shaft of a slip ring rotor 8;
specifically, the fan slip ring comprises a slip ring rotor 8, a slip ring stator 9, a front end bearing 10 and a rear end bearing 11, wherein the slip ring stator 9 is sleeved outside the slip ring rotor 8, and the front end bearing 10 and the rear end bearing 11 are respectively arranged at the front end and the rear end of the slip ring rotor 8 in the slip ring stator 9.
In this embodiment, a mounting bracket 5 is disposed inside the slip ring stator 9, the mounting bracket 5 is fixed on the slip ring stator 9, the tail end of a ring conductive brush 4 of the wind wheel rotation speed measuring device is fixed on the mounting bracket 5, and one end with a contact reliably contacts with a monitoring loop;
when the slip ring rotor 8 drives the detection loop 1 to synchronously rotate, the ring conductive brushes 4 are alternately contacted with the insulating tape 2 and the conductive rings 3, so that pulse signals can be generated, and the pulse signals are transmitted through the signal output cable 7.
The signal output cable of the wind wheel rotating speed measuring device is connected to the variable pitch system through the slip ring rotor side heavy load 12, and the generated pulse signal is connected to the variable pitch system.
The signal output end of the signal output cable of the wind wheel rotating speed measuring device is connected with the signal input end of the variable pitch system, and the rotating speed pulse signal is transmitted.
Example 3
The embodiment 3 of the invention discloses an overspeed protection method for wind wheel rotation speed, which is based on the measuring system for wind wheel rotation speed in the embodiment 2, and comprises the following steps:
s1: driving a wind generating set to work, and acquiring a rotating speed pulse signal through alternating contact of a ring conducting brush 4 and an insulating belt 2 and a conducting ring 3 of the detection loop 1;
specifically, as shown in fig. 3, when the fan is running, the detection loop 1 rotates synchronously along with the rotating shaft of the slip ring, the ring conductive brush 4 is alternately contacted with the insulating tape 2 and the conductive ring 3, when the ring conductive brush is contacted with the insulating tape 2 (a position), no signal voltage exists on the signal output cable 7, and when the ring conductive brush is contacted with the conductive ring 3 (b position), the signal voltage is generated on the signal output cable 7, so that a pulse signal with a certain frequency can be generated, the frequency of the signal is in direct proportion to the rotating speed of the detection loop 1, and the signal enters the pitch system through the heavy load 12 on the rotor side of the slip ring.
S2: calculating the receiving number of the rotating speed pulse signals in the set unit time;
s3: performing rotation speed conversion based on the number of the received rotation speed pulse signals to obtain the rotation speed of the detection loop 1;
in this embodiment, the rotation speed conversion is specifically as follows:
acquiring the number of the insulating strips 2 on the detection loop 1;
based on the number of the rotational speed pulse signals received in the set unit time;
and calculating and obtaining the ratio of the number of the rotating speed pulse signals to the number of the insulating strips 2 in real time to obtain the rotating speed of the wind wheel.
In this embodiment, the set unit time is 1min.
Assuming that the number of the insulating tapes 2 on the detection loop 1 is n, when the detection loop 1 rotates one circle, n pulse signals can be generated, and if the pitch system receives h pulse signals per minute, the rotation speed of the detection loop 1 is as follows: h/n (revolutions per minute), i.e. the rotor speed is h/n (revolutions per minute) at this time.
S4: and judging whether the speed of the detection loop 1 reaches or exceeds a set overspeed threshold value w by the variable pitch system, and immediately controlling the feathering protection of the blades when h/n is more than or equal to w.
In this embodiment, the method further includes performing validity judgment on the rotation speed pulse signal, when all blade angles of the pitch system are simultaneously lower than an angle limit value, if the rotation speed pulse is too low, reporting that measurement is abnormal, and protecting shutdown.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (10)
1. The utility model provides a measuring device of wind wheel rotational speed, its characterized in that is used for on the wind generating set, measuring device of wind wheel rotational speed is including detecting the circuit, the ring leads the brush, power supply cable and signal output cable, power supply cable with the one end of ring leads the brush is connected, the other end of ring leads the brush is equipped with the contact, with detect the circuit contact, the one end of signal output cable with detect the circuit inboard switch-on, detect the circuit including crisscross insulating tape and the conducting ring that sets up.
2. The wind wheel rotation speed measuring device according to claim 1, wherein the insulating strips and the conducting rings are uniformly distributed and staggered on the detection loop.
3. A system for measuring the rotational speed of a wind wheel, characterized in that the system for measuring the rotational speed of a wind wheel comprises a wind generating set, a pitch system and a device for measuring the rotational speed of a wind wheel according to any one of claims 1-2;
the detection loop of the measuring device of the wind wheel rotating speed is assembled on the fan slip ring of the wind generating set;
and a signal output end of a signal output cable of the wind wheel rotating speed measuring device is connected with the variable pitch system to transmit rotating speed pulse signals.
4. A system for measuring rotational speed of a wind wheel according to claim 3, wherein the wind turbine slip ring comprises a slip ring rotor, a slip ring stator, a front end bearing and a rear end bearing, wherein the slip ring stator is sleeved outside the slip ring rotor, and the front end bearing and the rear end bearing are respectively arranged at the front end and the rear end of the slip ring rotor in the slip ring stator.
5. The wind wheel rotating speed measuring system according to claim 4, wherein a mounting bracket is arranged in the slip ring stator, and the tail end of the ring conductive brush of the wind wheel rotating speed measuring device is fixed on the mounting bracket.
6. A system for measuring rotor speed according to claim 3, wherein the signal output cable of the rotor speed measuring device is connected to the pitch system via slip ring rotor side load.
7. An overspeed protection method for wind wheel rotation speed based on the wind wheel rotation speed measurement system of any one of claims 3-6, comprising:
s1: driving a wind generating set to work, and acquiring a rotating speed pulse signal through alternating contact of a ring conductive brush with an insulating belt and a conductive ring of the detection loop;
s2: calculating the receiving number of the rotating speed pulse signals in the set unit time;
s3: performing rotation speed conversion based on the number of the received rotation speed pulse signals to obtain the rotation speed of the detection loop;
s4: and judging whether the set overspeed threshold value is reached or exceeded by the variable pitch system according to the rotating speed of the detection loop, and if so, controlling the feathering protection of the blades by the variable pitch system.
8. The overspeed protection method of a wind turbine rotational speed according to claim 7, wherein in step S3, said rotational speed conversion is specifically as follows:
acquiring the number of insulating strips on the detection loop;
based on the number of the rotational speed pulse signals received in the set unit time;
and calculating and obtaining the ratio of the number of the rotating speed pulse signals to the number of the insulating belts in real time to obtain the rotating speed of the wind wheel.
9. The overspeed protection method of a wind turbine rotational speed of claim 8, wherein said set unit time is 1min.
10. The overspeed protection method of a wind turbine rotational speed of claim 7, further comprising, in step S4: and judging the effectiveness of the rotating speed pulse signal, and when the angles of all blades of the variable pitch system are simultaneously lower than the angle limit value, reporting measurement abnormality if the rotating speed pulse is too low, and protecting shutdown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310964212.0A CN116677571A (en) | 2023-08-02 | 2023-08-02 | Wind wheel rotating speed measuring device, system and overspeed protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310964212.0A CN116677571A (en) | 2023-08-02 | 2023-08-02 | Wind wheel rotating speed measuring device, system and overspeed protection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116677571A true CN116677571A (en) | 2023-09-01 |
Family
ID=87789487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310964212.0A Pending CN116677571A (en) | 2023-08-02 | 2023-08-02 | Wind wheel rotating speed measuring device, system and overspeed protection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116677571A (en) |
Citations (10)
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|---|---|---|---|---|
| FR2245950A1 (en) * | 1973-09-28 | 1975-04-25 | Peugeot & Renault | Angular speed measuring device - has optical sensor for use with printed circuit motor to sense printed pattern |
| CN1081543A (en) * | 1992-07-18 | 1994-02-02 | 虞国良 | Motor controlled by rotating magnetic field switch |
| JPH06245571A (en) * | 1993-02-16 | 1994-09-02 | Riken Corp | Rotation detection circuit for dc motor |
| DE10054530A1 (en) * | 2000-07-27 | 2002-02-14 | Daimler Chrysler Ag | Determination of the angular position of a brushless electric motor using magnetic pole signal generators around a rotor and fixed sensors to precisely determine rotor position by making an initial reference measurement |
| JP2007274771A (en) * | 2006-03-30 | 2007-10-18 | Toyota Motor Corp | Direct-current motor |
| US20120115335A1 (en) * | 2010-11-04 | 2012-05-10 | Nidec Servo Corporation | Slip ring device |
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| US20150185053A1 (en) * | 2013-12-26 | 2015-07-02 | Nuctech Company Limited | Encoder and Encoding Method for Slip Ring |
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-
2023
- 2023-08-02 CN CN202310964212.0A patent/CN116677571A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2245950A1 (en) * | 1973-09-28 | 1975-04-25 | Peugeot & Renault | Angular speed measuring device - has optical sensor for use with printed circuit motor to sense printed pattern |
| CN1081543A (en) * | 1992-07-18 | 1994-02-02 | 虞国良 | Motor controlled by rotating magnetic field switch |
| JPH06245571A (en) * | 1993-02-16 | 1994-09-02 | Riken Corp | Rotation detection circuit for dc motor |
| DE10054530A1 (en) * | 2000-07-27 | 2002-02-14 | Daimler Chrysler Ag | Determination of the angular position of a brushless electric motor using magnetic pole signal generators around a rotor and fixed sensors to precisely determine rotor position by making an initial reference measurement |
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| US20120115335A1 (en) * | 2010-11-04 | 2012-05-10 | Nidec Servo Corporation | Slip ring device |
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| US20150185053A1 (en) * | 2013-12-26 | 2015-07-02 | Nuctech Company Limited | Encoder and Encoding Method for Slip Ring |
| CN208416790U (en) * | 2018-06-04 | 2019-01-22 | 明阳智慧能源集团股份公司 | A kind of wind power generating set hypervelocity variable pitch protection structure |
| CN112628078A (en) * | 2020-11-09 | 2021-04-09 | 华能饶平风力发电有限公司 | Wind driven generator with blade self-checking function |
Non-Patent Citations (1)
| Title |
|---|
| 陈旭;: "变桨距风力发电控制系统的研究", 科学技术创新, no. 27 * |
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Application publication date: 20230901 |