CN111397866A - System and method for testing response time of brake of wind power pitch motor - Google Patents
System and method for testing response time of brake of wind power pitch motor Download PDFInfo
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- CN111397866A CN111397866A CN202010107669.6A CN202010107669A CN111397866A CN 111397866 A CN111397866 A CN 111397866A CN 202010107669 A CN202010107669 A CN 202010107669A CN 111397866 A CN111397866 A CN 111397866A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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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
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Abstract
The application discloses a system and a method for testing response time of a brake of a wind power variable pitch motor, wherein the system comprises a power management module, a super capacitor module, a servo driver and a P L C, the power management module is externally connected with an alternating current power supply, the power management module is connected with the servo driver, the servo driver is connected with an alternating current servo motor, the power management module supplies power to the P L C, the P L C is connected with the servo driver and controls starting and stopping of the brake, the maximum torque output by the alternating current servo motor is smaller than the rated holding torque which can be provided by the brake, and the super capacitor module is a backup emergency power supply.
Description
Technical Field
The invention belongs to the technical field of control of a brake of a wind power variable pitch motor, and relates to a system and a method for testing response time of the brake of the wind power variable pitch motor.
Background
In a wind power pitch system, particularly a three-phase alternating current asynchronous scheme pitch system, a control loop of the wind power pitch system needs to control starting and stopping of a pitch motor brake.
An electrically excited magnetic holding brake is used on a wind power variable pitch, and the theoretical system requirements are as follows: the brake torque can be separated immediately after the brake is electrified, so that the output torque of the motor is not influenced by the brake force; the brake can produce braking torque immediately after the outage, guarantees to lock the motor output shaft after the motor stops exporting. However, because an internal excitation magnetic field needs to be generated or eliminated in the process of switching on or off an electromagnetic coil inside the brake, a period of time delay exists, the delay time is directly related to a control time sequence of torque output of the wind power variable pitch system, and the system is negatively influenced by excessively slow connection time or separation time.
Therefore, the actual response time of the brake needs to be acquired in the initial stage of product design and the spot check of stable supply products, so that the torque output time sequence of the wind power variable pitch motor and the quality control of batch products are designed.
Disclosure of Invention
In order to solve the defects in the prior art, the application is designed on the basis of the utility model with the application number of CN201020604000.X and the patent name of 'a compact wind power variable pitch controller based on a low-voltage alternating current driving technology', a test system and a test method for the response time of a wind power variable pitch motor brake are provided, a single variable pitch axle box is used for controlling a variable pitch motor, a variable pitch motor brake loop and a servo driver are decoupled in the control of a P L C and the servo driver, the P L C independent control is adopted to obtain the on-off power starting time of the variable pitch motor brake, and the maximum torque output by a motor is ensured to be smaller than the torque of the variable pitch motor brake by adjusting parameters of the servo driver.
In order to achieve the above object, the first invention of the present application adopts the following technical solutions:
a test system for response time of a brake of a wind power pitch motor comprises a power supply management module, a super capacitor module, a servo driver and a P L C;
the power management module is externally connected with an alternating current input power supply, the output of the power management module is connected to the servo driver, the super capacitor module and the 24V power supply, and the output of the servo driver is connected with the alternating current servo motor;
the 24V power supply supplies power to the P L C;
p L C is connected to the servo driver through a CAN communication line, and P L C controls the brake to start and stop through a brake start-stop control loop;
the test system has the advantages that the maximum torque output by the alternating current servo motor is smaller than the rated holding torque which can be provided by the brake;
and the super capacitor module is connected in parallel between the power management module and the servo driver to serve as a backup emergency power supply.
The application also discloses another invention, namely a method for testing the response time of the brake of the wind power pitch motor, which is based on the system for testing the response time of the brake of the wind power pitch motor, and comprises the following steps:
step 1, a P L C control system performs brake separation time test and brake connection time test, and simultaneously, P L C records information of motor start and stop, brake start and stop, motor position, motor speed and motor current in the test process;
and 2, drawing a brake separation time data calculation graph and a brake connection time data calculation graph based on the test data recorded by the P L C to obtain the brake separation time and the brake connection time.
The invention further comprises the following preferred embodiments:
preferably, in step 1, the P L C control system performs a brake release time test, including the steps of:
step S1: controlling the motor and the brake to stop outputting;
step S2: controlling the output of the motor to start;
step S3: controlling the brake to start;
step S4: and controlling the starting and stopping of the motor and the brake.
Preferably, the step S1 is a step of controlling the motor and brake to stop outputting, specifically:
p L C sends a motor stop instruction to the servo driver through CAN communication;
the P L C cuts off the brake to supply power through the brake start-stop control loop;
step S2 is performed after it is determined that the motor position is stable and the motor speed is zero, otherwise step S1 is continuously performed.
Preferably, in step S2, the controlling the output of the motor to start includes:
the P L C sends a command to the servo driver through CAN communication and a generator;
and (4) when the position of the motor is not changed and the speed is zero, confirming that the motor is in a locked-rotor state, and entering the step S3, otherwise, continuing to execute the step S2.
Preferably, in step S3, the control brake is activated, specifically:
the P L C supplies power to the brake through the brake start-stop loop to start;
after determining that the motor position is changed and the speed is not zero, the process proceeds to step S4, otherwise, the process continues to step S3.
Preferably, in step S4, the controlling the start and stop of the motor and the brake includes:
keeping the starting state of the motor and the brake, and stopping the output of the motor and the brake at the same time after a preset certain time;
and (4) finishing the test after the position of the motor is determined to be unchanged and the speed is zero, otherwise, continuing to execute the step S4.
Preferably, in step 1, the P L C control system performs a brake connection time test, including the steps of:
step (1): controlling the starting output of the motor and the brake;
step (2): controlling the brake to stop;
and (3): and controlling the output of the motor to stop.
Preferably, the controlling the starting output of the motor and the brake in the step (1) specifically comprises:
p L C sends a motor rotation instruction to the servo driver through CAN communication;
the P L C supplies power to the brake through the brake start-stop control loop and opens the brake, and the motor is kept in a rotating state;
and (3) after the position change of the motor is judged and the speed is not zero, the step (2) is carried out, otherwise, the step (1) is continuously carried out.
Preferably, the step (2) of controlling the brake to stop includes:
the P L C cuts off the brake power supply through the brake control loop during the rotation of the motor;
and (4) after the position of the motor is unchanged and the speed is zero, entering the step (3), and if not, continuing to execute the step (2).
Preferably, the step (3) of controlling the output of the motor to stop includes:
after the motor stalling reaches the preset time, P L C issues a stop instruction, and the motor stops outputting;
and (4) after the current of the motor is judged to be zero, the system is confirmed to be completely stopped, the test is finished, and otherwise, the step (3) is continuously executed.
Preferably, in step 2, from the plotted brake release time data calculation map and brake connection time data calculation map, it is found that:
in the separation time testing process, when the brake is controlled to be started, the power supply starting time t11 of the brake is started through the brake starting and stopping loop by the P L C, and the speed t12 of the motor is changed and is not zero;
in the connection time test process, when the brake is controlled to stop, the power supply of the brake is disconnected at the moment t21 and the speed of the motor starts to reduce at the moment t22 by the P L C through the brake control loop in the motor rotation process;
and then obtaining the brake separation time: Δ t1 ═ t12-t11, brake connection time: Δ t 2-t 21-t 22.
The beneficial effect that this application reached:
this application will become oar motor brake return circuit and servo driver decoupling zero on P L C and servo driver control, adopts P L C independent control, obtains becoming oar motor brake switching on and shutting off initial time, and this application reasonable in design can assemble still observable response time behind the oar motor at the stopper, and is simple and convenient swift.
Drawings
FIG. 1 is a block diagram of a test system for response time of a wind power pitch motor brake according to the present application;
FIG. 2 is a flow chart of a method for testing response time of a wind turbine pitch motor brake according to the application;
FIG. 3 is a flow chart of a brake release time test performed by the P L C control system in the embodiment of the present application;
FIG. 4 is a flow chart of a brake connection time test performed by the P L C control system in the embodiment of the present application;
FIG. 5 is a graph of brake release time data calculation for an embodiment of the subject application;
fig. 6 is a calculation chart of brake connection time data in the embodiment of the present application.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
As shown in fig. 1, the test system for the response time of the brake of the wind power pitch motor comprises a power management module, a super capacitor module, a servo driver and a P L C;
the power management module is externally connected with an alternating current input power supply, the output of the power management module is connected to the servo driver, the super capacitor module and the 24V power supply, and the output of the servo driver is connected with the alternating current servo motor;
the 24V power supply supplies power to the P L C;
p L C is connected to the servo driver through a CAN communication line, and P L C controls the brake to start and stop through a brake start-stop control loop;
the test system has the advantages that the maximum torque output by the alternating current servo motor is smaller than the rated holding torque which can be provided by the brake;
and the super capacitor module is connected in parallel between the power management module and the servo driver to serve as a backup emergency power supply.
As shown in fig. 2, the test method for the response time of the brake of the wind power pitch motor according to the application is based on the test system for the response time of the brake of the wind power pitch motor, and the method includes the following steps:
step 1, a P L C control system performs brake separation time test and brake connection time test, and simultaneously, P L C records information of motor start and stop, brake start and stop, motor position, motor speed and motor current in the test process;
when the separation time is tested, the brake is maintained in a power-off state, the variable pitch motor maintains a torque output state, the brake is powered on in the midway process under the control of P L C, the system acquires the position and speed feedback of the encoder, and the separation time of the brake after being powered on is calculated through the feedback of the encoder.
As shown in fig. 3, in step 1, the P L C control system performs a brake release time test, including the following steps:
step S1: controlling the motor and the brake to stop outputting specifically:
p L C sends a motor stop instruction to the servo driver through CAN communication;
the P L C cuts off the brake to supply power through the brake start-stop control loop;
after the stop command is issued, the motor is stopped, step S2 is performed after the motor position is determined to be stable and the motor speed is zero, otherwise step S1 is continuously performed.
Step S2: controlling the output of the motor to start specifically as follows:
the P L C sends a command to the servo driver through CAN communication and a generator;
the system adjusts parameters of the servo driver, so that the maximum torque output by the motor is smaller than the holding torque of the brake, and the motor is in a locked-rotor state when the brake is not started; and confirming that the motor is in a locked-rotor state by judging that the position of the motor is not changed and the speed is zero, and entering the step S3, otherwise, continuing to execute the step S2.
Step S3: controlling the brake to start, specifically:
p L C supplies power to the brake through the brake start-stop loop to start, and is marked as t11 at the moment;
due to the fact that excitation in the brake is delayed, separation time is needed, the motor is still in a state that the position is unchanged and the speed is zero after t11 is carried out for a period of time, the time when the position of the motor is changed and the speed is not zero is recorded as t12 after the position of the motor is changed and the speed is not zero, the operation goes to step S4, and otherwise, the operation continues to be carried out to step S3.
Step S4: control motor, stopper open and stop specifically do:
keeping the starting state of the motor and the brake, and stopping the output of the motor and the brake at the same time after a preset certain time;
and (4) finishing the test after the position of the motor is determined to be unchanged and the speed is zero, otherwise, continuing to execute the step S4.
When the connection time is tested, firstly, the torque output state of the motor is kept, the brake is in the power-on state, the variable-pitch motor rotates at a constant speed, the brake is powered off in the midway process, the position and speed feedback of the encoder is acquired by the system, and the connection time of the brake after the power off is calculated through the feedback of the encoder.
As shown in fig. 4, in step 1, the P L C control system performs a brake connection time test, which includes the following steps:
step (1): controlling the starting output of the motor and the brake specifically comprises the following steps:
p L C sends a motor rotation instruction to the servo driver through CAN communication;
the P L C supplies power to the brake through the brake start-stop control loop and opens the brake, and the motor is kept in a rotating state;
and (3) after the position change of the motor is judged and the speed is not zero, the step (2) is carried out, otherwise, the step (1) is continuously carried out.
Step (2): controlling the brake to stop, specifically:
the P L C cuts off the brake power supply through the brake control loop in the motor rotation process, which is marked as t 21;
because the rated holding torque of the brake is larger than the output torque of the motor, the motor starts to decelerate and is finally in a zero-speed locked-rotor state, and the moment when the speed of the motor starts to decelerate is recorded as t22 in P L C;
and (4) after the position of the motor is unchanged and the speed is zero, entering the step (3), and if not, continuing to execute the step (2).
And (3): controlling the output of the motor to stop specifically as follows:
after the motor locked-rotor reaches a short preset time, P L C issues a stop instruction, and the motor stops outputting;
and (4) after the current of the motor is judged to be zero, the system is confirmed to be completely stopped, the test is finished, and otherwise, the step (3) is continuously executed.
Step 2, drawing a brake separation time data calculation graph (shown in figure 5) and a brake connection time data calculation graph (shown in figure 6) based on the test data recorded by the P L C to obtain the brake separation time and the brake connection time, and specifically:
from the plotted brake release time data calculation map and brake connection time data calculation map, it follows:
in the separation time testing process, when the brake is controlled to be started, the power supply starting time t11 of the brake is started through the brake starting and stopping loop by the P L C, and the speed t12 of the motor is changed and is not zero;
in the connection time test process, when the brake is controlled to stop, the power supply of the brake is disconnected at the moment t21 and the speed of the motor starts to reduce at the moment t22 by the P L C through the brake control loop in the motor rotation process;
and then obtaining the brake separation time: Δ t1 ═ t12-t11, brake connection time: Δ t 2-t 21-t 22.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (12)
1. The utility model provides a wind-powered electricity generation becomes test system of oar motor brake response time which characterized in that:
the system comprises a power management module, a super capacitor module, a servo driver and a P L C;
the power management module is externally connected with an alternating current input power supply, the output of the power management module is connected to the servo driver, the super capacitor module and the 24V power supply, and the output of the servo driver is connected with the alternating current servo motor;
the 24V power supply supplies power to the P L C;
p L C is connected to the servo driver through a CAN communication line, and P L C controls the brake to start and stop through a brake start-stop control loop;
the test system has the advantages that the maximum torque output by the alternating current servo motor is smaller than the rated holding torque which can be provided by the brake;
and the super capacitor module is connected in parallel between the power management module and the servo driver to serve as a backup emergency power supply.
2. A test method for response time of a brake of a wind power pitch motor is based on the test system for response time of the brake of the wind power pitch motor of claim 1, and is characterized in that:
the method comprises the following steps:
step 1, a P L C control system performs brake separation time test and brake connection time test, and simultaneously, P L C records information of motor start and stop, brake start and stop, motor position, motor speed and motor current in the test process;
and 2, drawing a brake separation time data calculation graph and a brake connection time data calculation graph based on the test data recorded by the P L C to obtain the brake separation time and the brake connection time.
3. The method for testing the response time of the brake of the wind power pitch motor according to claim 2, characterized by comprising the following steps:
in step 1, the P L C control system performs a brake separation time test, and the method comprises the following steps:
step S1: controlling the motor and the brake to stop outputting;
step S2: controlling the output of the motor to start;
step S3: controlling the brake to start;
step S4: and controlling the starting and stopping of the motor and the brake.
4. The method for testing the response time of the brake of the wind power pitch motor according to claim 3, characterized by comprising the following steps:
step S1, the control motor and the brake stop output control specifically includes:
p L C sends a motor stop instruction to the servo driver through CAN communication;
the P L C cuts off the brake to supply power through the brake start-stop control loop;
step S2 is performed after it is determined that the motor position is stable and the motor speed is zero, otherwise step S1 is continuously performed.
5. The method for testing the response time of the brake of the wind power pitch motor according to claim 3, characterized by comprising the following steps:
step S2, controlling the output of the motor to start, specifically:
the P L C sends a command to the servo driver through CAN communication and a generator;
and (4) when the position of the motor is not changed and the speed is zero, confirming that the motor is in a locked-rotor state, and entering the step S3, otherwise, continuing to execute the step S2.
6. The method for testing the response time of the brake of the wind power pitch motor according to claim 3, characterized by comprising the following steps:
step S3, controlling the brake to start, specifically:
the P L C supplies power to the brake through the brake start-stop loop to start;
after determining that the motor position is changed and the speed is not zero, the process proceeds to step S4, otherwise, the process continues to step S3.
7. The method for testing the response time of the brake of the wind power pitch motor according to claim 3, characterized by comprising the following steps:
step S4 the control motor, stopper open and stop specifically is:
keeping the starting state of the motor and the brake, and stopping the output of the motor and the brake at the same time after a preset certain time;
and (4) finishing the test after the position of the motor is determined to be unchanged and the speed is zero, otherwise, continuing to execute the step S4.
8. The method for testing the response time of the brake of the wind power pitch motor according to claim 2, characterized by comprising the following steps:
in step 1, the P L C control system performs a brake connection time test, and the method comprises the following steps:
step (1): controlling the starting output of the motor and the brake;
step (2): controlling the brake to stop;
and (3): and controlling the output of the motor to stop.
9. The method for testing the response time of the brake of the wind power pitch motor according to claim 8, characterized by comprising the following steps:
controlling the starting output of the motor and the brake in the step (1), which specifically comprises the following steps:
p L C sends a motor rotation instruction to the servo driver through CAN communication;
the P L C supplies power to the brake through the brake start-stop control loop and opens the brake, and the motor is kept in a rotating state;
and (3) after the position change of the motor is judged and the speed is not zero, the step (2) is carried out, otherwise, the step (1) is continuously carried out.
10. The method for testing the response time of the brake of the wind power pitch motor according to claim 8, characterized by comprising the following steps:
and (2) controlling the brake to stop, specifically:
the P L C cuts off the brake power supply through the brake control loop in the motor rotation process, which is marked as t 21;
and (4) after the position of the motor is unchanged and the speed is zero, entering the step (3), and if not, continuing to execute the step (2).
11. The method for testing the response time of the brake of the wind power pitch motor according to claim 8, characterized by comprising the following steps:
and (3) controlling the output of the motor to stop, specifically comprising the following steps:
after the motor stalling reaches the preset time, P L C issues a stop instruction, and the motor stops outputting;
and (4) after the current of the motor is judged to be zero, the system is confirmed to be completely stopped, the test is finished, and otherwise, the step (3) is continuously executed.
12. The method for testing the response time of the brake of the wind power pitch motor according to claim 2, characterized by comprising the following steps:
in step 2, from the drawn brake separation time data calculation map and the brake connection time data calculation map, the following results are obtained:
in the separation time testing process, when the brake is controlled to be started, the power supply starting time t11 of the brake is started through the brake starting and stopping loop by the P L C, and the speed t12 of the motor is changed and is not zero;
in the connection time test process, when the brake is controlled to stop, the power supply of the brake is disconnected at the moment t21 and the speed of the motor starts to reduce at the moment t22 by the P L C through the brake control loop in the motor rotation process;
and then obtaining the brake separation time: Δ t1 ═ t12-t11, brake connection time: Δ t 2-t 21-t 22.
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| CN202010107669.6A CN111397866B (en) | 2020-02-21 | 2020-02-21 | System and method for testing response time of brake of wind power pitch motor |
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| CN202010107669.6A CN111397866B (en) | 2020-02-21 | 2020-02-21 | System and method for testing response time of brake of wind power pitch motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112763126A (en) * | 2021-01-28 | 2021-05-07 | 国能信控互联技术(河北)有限公司 | Brake torque testing method and system for variable pitch synchronous motor brake |
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