CN107781104A - Control method and control circuit for propeller retracting - Google Patents
Control method and control circuit for propeller retracting Download PDFInfo
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- CN107781104A CN107781104A CN201610779589.9A CN201610779589A CN107781104A CN 107781104 A CN107781104 A CN 107781104A CN 201610779589 A CN201610779589 A CN 201610779589A CN 107781104 A CN107781104 A CN 107781104A
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- encoder
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- pitch driver
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 80
- 238000004088 simulation Methods 0.000 claims description 75
- 230000008859 change Effects 0.000 claims description 10
- 230000003111 delayed effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000008439 repair process 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
- F03D7/00—Controlling wind motors
-
- 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)
- 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)
- Control Of Electric Motors In General (AREA)
Abstract
The embodiment of the invention provides a control method and a control circuit for oar collection, which comprise the following steps: monitoring whether the encoder fails; when the encoder is determined to be in fault, the encoder is controlled to stop outputting a first incremental signal to a variable pitch driver, and the analog incremental signal generating circuit is controlled to output a second incremental signal to the variable pitch driver, so that the variable pitch driver sends a pitch receiving control signal to a variable pitch motor according to the second incremental signal. After the encoder fails, the incremental signals cannot be output as the reference signals of the variable pitch driver, the analog incremental signal generating circuit is controlled to output the incremental signals as the reference signals of the variable pitch driver, the normal work of the variable pitch driver is ensured, and the variable pitch motor is driven to take up the pitch.
Description
Technical field
The present invention relates to technical field of wind power, more particularly to a kind of control method and control circuit put away the oars.
Background technology
Wind-driven generator is to convert wind energy into mechanical energy, then the equipment for converting mechanical energy into electric energy.Work as wind-power electricity generation
During machine failure, for safety guarantee, it is necessary to be put away the oars to the blade of wind power generating set, i.e., by the blade of wind power generating set
Feathering is to 90 degree.Each blade of wind power generating set has independent variable pitch driver, and the variable pitch driver can control change oar
The running speed and rotation direction of motor, pitch motor engage linkage with the internal tooth of pitch variable bearings by gear, control blade
The change of propeller pitch angle.
At present, when the blade of wind power generating set is put away the oars, the operating condition of encoders monitor pitch motor, to change oar
Driver sends incremental signal.The incremental signal that variable pitch driver is sent according to encoder, confirm pitch motor reality
Running speed and rotation direction, and then the operating condition of pitch motor is controlled, form the feedback control to pitch motor.
But when encoder fault, encoder sends incremental signal without normal direction variable pitch driver, causes pitch drive
Device disorderly closedown, uncontrollable pitch motor operating, pitch motor, which is shut down, can make the blade of wind power generating set card oar occur, lead
Cause is put away the oars unsuccessfully.
The content of the invention
Present invention solves the technical problem that it is to provide a kind of control method and control circuit put away the oars, so as to compile
During code device failure, incremental signal is generated by simulation increment signal generation circuit so that variable pitch driver driven becomes oar electricity
Machine is put away the oars.
Therefore, the technical scheme that the present invention solves technical problem is：
A kind of control method put away the oars, methods described include：
Whether monitoring encoder breaks down；
When it is determined that the encoder breaks down, the encoder is controlled to stop exporting the first increment to variable pitch driver
Formula signal, and control the simulation increment signal generation circuit to export the second incremental signal to variable pitch driver, to cause
The variable pitch driver sends control signal of putting away the oars according to second incremental signal to pitch motor.
Optionally, it is described monitoring encoder whether break down including：
Whether the absolute value signal of monitoring from encoder collection is abnormal, when the absolute value letter gathered from the encoder
During number exception, determine that the encoder breaks down.
Optionally, whether failure includes the monitoring encoder：
Monitor whether to receive the DTC that the variable pitch driver is sent, when receiving what the variable pitch driver was sent
During DTC, determine that the encoder breaks down, the DTC is used to characterize the encoder fault.
Optionally, the control encoder stops exporting the first incremental signal to variable pitch driver, described in control
Simulation increment signal generation circuit exports the second incremental signal to variable pitch driver to be included：
First switch is controlled to disconnect, control second switch closure, the encoder is via the first switch and the change
Pitch driver is connected, and the analog signal generation circuit is connected via the second switch with the variable pitch driver；
The simulation increment signal generation circuit is connected, the increment signal generation circuit of simulating is to the variable pitch driver
Export the second incremental signal.
Optionally, the control first switch disconnects, and control second switch closure includes：
Control the first switch to disconnect by connecting D.C. contactor, control the second switch to close.
Optionally, the connection simulation increment signal generation circuit includes：
After connecting the D.C. contactor, be delayed prefixed time interval, connects relay to control the 3rd switch to close, institute
State the 3rd switch closure and characterize the connection simulation increment signal generation circuit.
Optionally, methods described also includes：
Reset signal is sent to the variable pitch driver, the reset signal is answered for triggering the variable pitch driver
Position.
Optionally, methods described also includes：
Monitor whether to trigger limit switch；
When triggering the limit switch, the variable pitch driver is controlled to be stopped.
A kind of control circuit put away the oars, the circuit include：
Pitch control device, encoder, variable pitch driver, and simulation increment signal generation circuit；
The pitch control device electrically connects with the simulation increment signal generation circuit, and the encoder drives with the change oar
Dynamic device electrical connection, the simulation increment signal generation circuit electrically connect with the variable pitch driver；
Whether the pitch control device monitoring encoder breaks down, when it is determined that the encoder breaks down, control
The encoder stops exporting the first incremental signal to the variable pitch driver, and controls the simulation increment signal to produce
Circuit exports the second incremental signal to the variable pitch driver.
Optionally, the circuit also includes：
First switch, and second switch；
The encoder electrically connects via the first switch with the variable pitch driver, and the simulation increment signal produces
Circuit electrically connects via the second switch with the variable pitch driver；
The pitch control device controls the first switch to disconnect, to cause the encoder to stop to the pitch drive
Device exports the first incremental signal；The pitch control device controls the second switch closure, to cause the simulation increment to believe
Number generation circuit exports the second incremental signal to the variable pitch driver.
Optionally, the circuit also includes：
D.C. contactor, the D.C. contactor electrically connect with the pitch control device；
The D.C. contactor, for when connecting, controlling the first switch to disconnect, and control the second switch to close
Close.
Optionally, the circuit also includes：
3rd switch, and relay, the relay electrically connect with the pitch control device, the pitch control device warp
Electrically connected by the described 3rd switch with the simulation increment signal generation circuit；
After the pitch control device connects the D.C. contactor, be delayed prefixed time interval, connects the relay；
The relay, for when connecting, control the 3rd switch closure, the 3rd switch closure, which characterizes, to be connected
The working power of the simulation increment signal generation circuit.
According to the above-mentioned technical solution, the method have the advantages that：
The embodiments of the invention provide the control method put away the oars to include：Whether monitoring encoder breaks down；When it is determined that institute
When stating encoder and breaking down, the encoder is controlled to stop exporting the first incremental signal to variable pitch driver, and control
The simulation increment signal generation circuit exports the second incremental signal to variable pitch driver, to cause the variable pitch driver root
According to second incremental signal control signal of putting away the oars is sent to pitch motor.After encoder fault, it is impossible to which output increment formula is believed
Reference signal number as variable pitch driver, control simulation increment signal generation circuit output increment formula signal is as pitch drive
The reference signal of device, ensures variable pitch driver normal work, and driving pitch motor is put away the oars.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the incremental signal schematic diagram of encoder output；
Fig. 2 is control circuit one exemplary construction schematic diagram provided in an embodiment of the present invention of putting away the oars；
Fig. 3 is another exemplary construction schematic diagram of control circuit provided in an embodiment of the present invention of putting away the oars；
Fig. 4 is control circuit yet another embodiment structural representation provided in an embodiment of the present invention of putting away the oars；
Fig. 5 is the electrical block diagram of encoder normal work provided in an embodiment of the present invention；
Fig. 6 is control method flow chart provided in an embodiment of the present invention of putting away the oars.
Embodiment
The implementation smoothly put away the oars during in order to be given at encoder fault, put away the oars the embodiments of the invention provide a kind of
Control method and control circuit, the preferred embodiments of the present invention are illustrated below in conjunction with Figure of description.
The operating condition of encoders monitor pitch motor, to variable pitch driver output increment formula signal, the incremental signal
The operating condition of current pitch motor can be characterized.Incremental signal schematic diagram as shown in Figure 1, the incremental signal include logical
Road A, passage B, and passage N.Passage A differs 90 ° with passage B phase difference.Variable pitch driver compares in incremental signal and led to
Road A pulse signal and passage B pulse signal it is front and rear, it is known that the rotation direction of pitch motor；According to passage A or passage
B pulse signal, it is known that the running speed of pitch motor；According to passage N zero reference pulse, it is known that pitch motor operating
The number of turns.Variable pitch driver is using the incremental signal that encoder exports as reference signal, so as to know the operating shape of pitch motor
State, and then by the way of closed loop feedback, control the running speed and rotation direction of pitch motor.But work as encoder fault
When, variable pitch driver can not receive incremental signal as reference signal, then variable pitch driver can failure, can not driven
Pitch motor is realized and put away the oars.
Fig. 2 is control circuit structural representation provided in an embodiment of the present invention of putting away the oars, including：
Pitch control device 201, encoder 202, variable pitch driver 203, and simulation increment signal generation circuit 204.
Pitch control device 201 electrically connects with simulation increment signal generation circuit 204, encoder 202 and variable pitch driver 203
Electrical connection, simulation increment signal generation circuit 204 electrically connect with variable pitch driver 203.
Pitch control device 201 monitor encoder 202 whether failure, when 202 failure of encoder, control encoder 202 stop
The first incremental signal only is exported to variable pitch driver 203, control simulation increment signal generation circuit 204 is defeated to variable pitch driver
Go out the second incremental signal.
As shown in Fig. 2 during 202 normal work of encoder, encoder 202 electrically connects with variable pitch driver 203, works as encoder
During 202 failure, pitch control device 201 controls encoder 202 to be disconnected with variable pitch driver 203, that is, controls encoder 202 to stop
Only the first incremental signal is exported to variable pitch driver 203；And simulation increment signal generation circuit 204 is controlled to variable pitch driver
Export the second incremental signal.
Explanation is needed exist for, it is defeated to variable pitch driver 203 that the pitch control device 201 controls encoder 202 to stop
Go out the first incremental signal, a variety of possible implementations can be used.The first possible implementation, pitch control device
Connection is switched off between 201 control encoders 202 and variable pitch driver 203, to cause encoder 202 becomes oar without normal direction to drive
Dynamic device 203 exports the first incremental signal；Second of possible implementation, pitch control device 201 cut off encoder 202 with supplying
Electrical connection between power supply, to cause encoder 202 to be stopped, the first incremental signal can not be exported.Certainly, oar control is become
Device 201 processed can also use other possible implementation control encoders 202 to stop increasing to the output of variable pitch driver 203 first
Amount formula signal, is repeated no more here.
In one example, as shown in figure 3, pitch control device 201 is by switching off encoder 202 and variable pitch driver
Electrical connection between 203, the control circuit put away the oars include：
First switch 301, and second switch 302.
Encoder 202 electrically connects via first switch 301 with variable pitch driver 203, simulation increment signal generation circuit 204
Electrically connected via second switch 302 with variable pitch driver 203.
Pitch control device 201 controls first switch 301 to disconnect, make it that it is defeated to variable pitch driver 203 that encoder 202 stops
Go out the first incremental signal；Pitch control device 201 controls the second switch 302 to close, to cause the simulation increment signal
Generation circuit exports the second incremental signal to the variable pitch driver.
Then pitch control device 201 controls encoder 202 to stop exporting the first incremental signal to variable pitch driver 203, i.e.,
Pitch control device 201 controls first switch 301 to disconnect；The control of pitch control device 201 simulates increment signal generation circuit 204 to change
Pitch driver 203 exports the second incremental signal, i.e. pitch control device 201 controls second switch 302 to close.
In one example, as shown in figure 4, circuit also includes：
D.C. contactor 401, D.C. contactor 401 electrically connect with pitch control device 201；
D.C. contactor 401, for when connecting, control first switch 301 to disconnect, and controls second switch 302 to close.
Pitch control device 201 passes through the indirect control first switch 301 of D.C. contactor 401 and second switch 302.Direct current connects
When tentaculum 401 is not switched on, first switch 301 closes, and second switch 302 disconnects；After D.C. contactor 401 is connected, first opens
Close 301 to disconnect, second switch 302 closes.Then the control of pitch control device 201 control encoder 202 stops to variable pitch driver 203
The first incremental signal is exported, control simulation increment signal generation circuit 204 exports the second incremental signal to variable pitch driver,
Connect the D.C. contactor 401.
Explanation is needed exist for, can also be according to being actually needed setting, during the connection of D.C. contactor 401, first switch
Closure, second switch disconnect；When D.C. contactor 401 is not switched on, first switch disconnects, second switch closure.Now, oar is become
Driver disconnects the connection of D.C. contactor 401.
In one example, as shown in figure 4, the control circuit circuit put away the oars can also include：
3rd switch 402, and relay 403；
Pitch control device 201 electrically connects via the 3rd switch 402 with simulation increment signal generation circuit 204, pitch control
After device 201 connects D.C. contactor 401, be delayed prefixed time interval, connects relay 403.
Relay 403, for when connecting, the closure of the switch of control the 3rd 402, the closure of the 3rd switch 402, which characterizes, to connect mould
Intend increment signal generation circuit 204.
Pitch control device 201 connects simulation increment signal generation circuit by the 3rd switch 402 with the control of relay 403
204.Simulation increment signal generation circuit 204 is connected via the 3rd switch 402 with pitch control device 201, and the 3rd switch 402 closes
Close, pitch control device 201 is to electricity on simulation increment signal generation circuit 204, now, the energy of simulation increment signal generation circuit 204
Enough export the second incremental signal.
After pitch control device 201 connects D.C. contactor 401, relay 403 is not connected directly, but it is default to be delayed
Time interval, relay 403 is then connected again, now, the closure of the 3rd switch 402, pitch control device 201 connects simulation increment letter
Number generation circuit 204.Simulation increment signal generation circuit 204 is connected in delay, avoids encoder 202 defeated to variable pitch driver 203
The first incremental signal gone out is believed with simulation increment signal generation circuit 204 to the second increment type that variable pitch driver 203 exports
Number conflict.
After 202 failture evacuation of encoder, as shown in figure 5, pitch control device 201 can control first switch 301 to close,
Second switch 302 disconnects, and the 3rd switch 402 also disconnects, and then controls encoder 202 to increase to the output of variable pitch driver 203 first
Amount formula signal, control simulation increment signal generation circuit 204 stop exporting the second incremental signal to variable pitch driver 203, become
Pitch driver 203 is used as reference signal using the first incremental signal.
As shown in the above, the method have the advantages that：
(1) after encoder fault, encoder sends the first increment signal, now, pitch control without normal direction variable pitch driver
Device cuts off the connection between encoder and variable pitch driver, and control encoder stops sending the first increment letter to variable pitch driver
Number, the electrical connection that pitch control device is connected between simulation increment signal generation circuit and variable pitch driver, by simulation increment signal
Generation circuit exports the second increment signal as reference signal to variable pitch driver.So that variable pitch driver does not report failure or event
Barrier can be reset, and to realize, pitch motor can be put away the oars with driving blade to home after encoder fault, ensure wind-power electricity generation
The safety of machine；
(2) power supply for simulating increment signal generation circuit is switched on or switched off by pitch control device control, to prevent electricity
When net voltage fluctuates, simulation increment signal generation circuit is burnt, further ensure that the realization for function of putting away the oars；
(3) D.C. contactor is controlled by pitch control device, for after encoder fault, controlling the first of encoder output
The switching of increment signal and the second increment signal of simulation increment signal generation circuit output, it is ensured that increase in circuit with first
Signal is measured to input for the priority signal of variable pitch driver.
(4) control circuit provided by the invention of putting away the oars is easily achieved, and control method is safe and reliable；It is real using DSP cans
The generation of existing second increment signal, circuit cost are low；In addition, the input signal circuit of variable pitch driver is switched over, meanwhile,
The purpose that relay is connected in delay is to prevent the first increment signal from being clashed with the second increment information.
Fig. 6 is a kind of control method flow chart put away the oars provided in an embodiment of the present invention, including：
601：Whether monitoring encoder breaks down.
602：When it is determined that the encoder breaks down, control encoder stops exporting the first increment to variable pitch driver
Formula signal, and control simulation increment signal generation circuit to export the second incremental signal to variable pitch driver, to become oar
Driver sends control signal of putting away the oars according to the second incremental signal to pitch motor.
Pitch control device monitor in real time encoder whether failure, have at least two possible implementations, pitch control device
Can directly monitor encoder whether failure, can also know indirectly by variable pitch driver encoder whether failure.
The first possible implementation, monitoring encoder whether break down including：
Whether the absolute value signal of monitoring from encoder collection is abnormal, when the absolute value signal gathered from encoder is abnormal
When, determine that the encoder breaks down.
Pitch control device receives the absolute value signal that encoder is sent, if encoder fault, encoder is to pitch control
The absolute value signal that device is sent is wrong, and what is more, encoder can not send absolute value signal to pitch control device at all.When change oar
The absolute value that controller gathers from encoder is wrong, or when can not collect absolute value signal from encoder, pitch control device
The encoder fault can be monitored.
Second of possible implementation, monitoring encoder whether break down including：
Monitor whether to receive the DTC that variable pitch driver is sent, when the DTC for receiving variable pitch driver transmission
When, determine that the encoder breaks down, DTC is used to characterize encoder fault.
Variable pitch driver receives the incremental signal that encoder is sent, when variable pitch driver receives the increasing of encoder transmission
Amount formula signal is wrong, or variable pitch driver can not receive encoder transmission incremental signal when, variable pitch driver determine
Encoder fault.Communication connection is established between pitch control device and variable pitch driver, variable pitch driver determines encoder fault
Afterwards, DTC is sent to pitch control device using the communication connection between pitch control device, the DTC can characterize the volume
Code device failure.
After pitch control device receives the DTC of variable pitch driver transmission, encoder event is determined according to the DTC
Barrier.After encoder fault, variable pitch driver can not be given to send the first incremental signal, then in order to ensure the normal work of variable pitch driver
Make, pitch control device control simulation increment signal generation circuit exports the second incremental signal, pitch drive to variable pitch driver
Device sends control signal of putting away the oars using the second incremental signal as reference signal, to pitch motor, and realization is put away the oars.
The second incremental signal of increment signal generation circuit generation is simulated, is the pulse signal that a cycle is fixed, with
First incremental signal of the encoder output shown in Fig. 1 is similar.The running speed that second incremental signal is characterized is certain, fortune
It is also certain to turn direction.The rotation direction is the rotation direction of required pitch motor of putting away the oars.Also, during putting away the oars, become oar
The running speed of motor needs to keep constant.
In one example, as shown in figure 3, control encoder 202 stops exporting the first increment type to variable pitch driver 203
Signal, control simulation increment signal generation circuit 204 exports the second incremental signal to variable pitch driver 203 to be included：
Control first switch 301 disconnects, and control second switch 302 closes, and encoder 202 is via first switch 301 with becoming
Pitch driver is connected, and model signals generation circuit 204 is connected via second switch 302 with variable pitch driver 203；
Simulation increment signal generation circuit 204 is connected, simulation increment signal generation circuit 204 is defeated to variable pitch driver 203
Go out the second incremental signal.
Encoder 202 electrically connects via first switch 301 with variable pitch driver 203, simulation increment signal generation circuit 204
Electrically connected via second switch 302 with variable pitch driver 203.
Control encoder 202 stops exporting the first incremental signal to variable pitch driver 203, then pitch control device 203 is controlled
First switch 301 processed disconnects.First switch 301 disconnects, then encoder 202 disconnects with variable pitch driver 203, then compiles
Code device 202 exports the first incremental signal without normal direction variable pitch driver 203.
Control simulation increment signal generation circuit 204 exports the second incremental signal to variable pitch driver 203, then becomes oar control
Device 201 processed controls second switch 302 to close.Second switch 302 closes, then simulates increment signal generation circuit 204 with becoming
Pitch driver 203 is electrically connected, and the second incremental signal of the generation of simulation increment signal generation circuit 204 is exported to variable pitch driver
203。
Optionally, as shown in figure 4, control first switch 301 disconnects, the control closure of second switch 302 includes：
First switch 301 is controlled to disconnect by connecting D.C. contactor 401, control second switch 302 closes.
Pitch control device 201 connects D.C. contactor 401, i.e., to electric on the D.C. contactor 401, then the D.C. contactor
On 401 after electricity, first switch 301 disconnects, and second switch 302 closes.
Optionally, as shown in figure 4, connecting simulation increment signal generation circuit 204 includes：
After connecting D.C. contactor 401, be delayed prefixed time interval, connects relay 403 to control the 3rd switch 402 to close
Close, the closure of the 3rd switch 402, which characterizes, connects simulation increment signal generation circuit 204.
Pitch control device 201 connects simulation increment signal generation circuit 204, i.e., to simulation increment signal generation circuit 204
Upper electricity.Pitch control device 201 can connect D.C. contactor 401 simultaneously, electric on increment signal generation circuit 204 to simulating,
Second incremental signal of the generation of control simulation increment signal generation circuit 204 is exported to variable pitch driver 203.
Pitch control device 201 can also be after D.C. contactor 401 be connected, and be delayed prefixed time interval, then connects relay
Device 403, the closure of the 3rd switch of the relay 403 control 402, so as to connect the simulation increment signal generation circuit 204.I.e. disconnected
After opening the connection between encoder 202 and variable pitch driver 203, delay connects simulation increment signal generation circuit 204 with becoming oar
Connection between driver 203.Simulation increment signal generation circuit 204 is connected in delay, avoids encoder 202 to variable pitch driver
The second increment that first incremental signal of 203 outputs exports with simulation increment signal generation circuit 204 to variable pitch driver 203
Formula signal conflict.
Explanation is needed exist for, according to being actually needed, the pitch control device 201 connects simulation increment signal generation circuit
After 204,24V operating voltage is provided to the simulation increment signal generation circuit 204.
In one example, method also includes：
Reset signal is sent to variable pitch driver, reset signal is resetted for triggering variable pitch driver.
Generally, after the failure of encoder 202, variable pitch driver 203 also can failure, and then pitch motor can not be driven
Normal work, pitch motor can also be shut down.Increment signal generation circuit 204 is simulated with after the connection of variable pitch driver 203, becoming oar control
Device 201 processed sends reset signal to variable pitch driver 203, triggers the variable pitch driver 203 and resets, repairs due to encoder 202
Failure and the failure of caused variable pitch driver 203, to cause variable pitch driver 203 to receive simulation increment signal generation circuit
Normal work after second incremental signal of 204 outputs.
If it is unsuccessful that pitch control device 201 monitors that variable pitch driver 203 once resets, variable pitch driver is repeated
203 operations resetted, until variable pitch driver 203 resets successfully.After variable pitch driver 203 resets successfully, simulation increment is received
The second incremental signal that signal generating circuit 204 exports, using second incremental signal as reference signal, sent out to pitch motor
Control signal of putting away the oars is sent, is put away the oars via pitch motor control blade.
Explanation is needed exist for, before being resetted to variable pitch driver 203, pitch control device 201 will also judge to become
Whether the number that pitch driver 203 is resetted exceedes preset times, if the number that variable pitch driver 203 is resetted exceedes in advance
If number, then reset operation no longer is carried out to variable pitch driver 203, to protect pitch motor.If variable pitch driver 203 is carried out
The number of reset is not above preset times, then performs the operation that reset signal is sent to variable pitch driver.
In one example, method also includes：
Monitor whether to trigger limit switch；
When triggering limit switch, control variable pitch driver is stopped.
Because the control method of putting away the oars provided by the present invention given is to export the second increasing by simulation increment signal generation circuit 204
Reference signal of the amount formula signal as variable pitch driver 203, switch control are put away the oars, then variable pitch driver 203 can not be known and put away the oars
Propeller pitch angle, i.e. variable pitch driver 203 can not know when that end is put away the oars.One limit switch, the limit switch energy are then set
It is enough to characterize end of putting away the oars.
When no triggering limit switch, limit switch exports high level to pitch control device 201；When triggering limit switch
When, end of putting away the oars is represented, now limit switch exports low level to pitch control device 201.Pitch control device 201 receives spacing
After the low level for switching output, monitor to trigger limit switch, pitch control device 201 controls variable pitch driver 203 to be stopped.
Pitch control device 201 is stopped, and pitch motor 203 is also stopped, and terminates to put away the oars.
Certainly, in actual applications, after the failture evacuation of encoder 202, pitch control device 201 controls encoder 202 to change
Pitch driver 203 exports the first incremental signal, and control simulation increment signal generation circuit 204 stops to variable pitch driver 203
Export the second incremental signal.
As shown in the above, the method have the advantages that：
(1) after encoder fault, it is impossible to which reference signal of the output increment formula signal as variable pitch driver, control simulation increase
Reference signal of the signal generating circuit output increment formula signal as variable pitch driver is measured, ensures variable pitch driver normal work,
Driving pitch motor is put away the oars.So that variable pitch driver does not report failure or failure to be reset, to realize encoder fault
Pitch motor can be put away the oars to home with driving blade afterwards, ensure the safety of wind-driven generator；
(2) power supply of incremental analog signals generation circuit is switched on or switched off by pitch control device control, to prevent electricity
When net voltage fluctuates, incremental analog signals generation circuit is burnt, further ensure that the realization for function of putting away the oars；
(3) D.C. contactor is controlled by pitch control device, for after encoder fault, controlling the first of encoder output
The switching of increment signal and the second increment signal of simulation increment signal generation circuit output, it is ensured that increase in circuit with first
Signal is measured to input for the priority signal of variable pitch driver.
(4) control method provided by the present invention of putting away the oars is put away the oars control method for open loop, that is, after triggering limit switch, becomes oar
Controller control stops the operation of variable pitch driver and pitch motor, so need not be calibrated to the second increment signal；
(5) second increment signals are easy to adjust, can by changing passage A, the tandem of passage B phases ensures to simulate
Second increment signal caused by increment signal generation circuit and blade direction of putting away the oars are consistent.
The control method put away the oars shown in Fig. 6 is and the method put away the oars corresponding to control circuit shown in Fig. 2 to Fig. 4 tool
Body implementation method is similar with the circuit shown in Fig. 2 to Fig. 4, referring to figs. 2 to the description of the circuit shown in Fig. 4, repeats no more here.
It the above is only the preferred embodiment of the present invention, it is noted that come for those skilled in the art
Say, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (12)
1. a kind of control method put away the oars, it is characterised in that methods described includes：
Whether monitoring encoder breaks down；
When it is determined that the encoder breaks down, the encoder is controlled to stop exporting the first increment type letter to variable pitch driver
Number, and control the simulation increment signal generation circuit to export the second incremental signal to variable pitch driver, it is described to cause
Variable pitch driver sends control signal of putting away the oars according to second incremental signal to pitch motor.
2. according to the method for claim 1, it is characterised in that it is described monitoring encoder whether break down including：
Whether the absolute value signal of monitoring from encoder collection is abnormal, when the absolute value signal gathered from the encoder is different
Chang Shi, determine that the encoder breaks down.
3. according to the method for claim 1, it is characterised in that whether failure includes the monitoring encoder：
Monitor whether to receive the DTC that the variable pitch driver is sent, when the failure for receiving the variable pitch driver transmission
During code, determine that the encoder breaks down, the DTC is used to characterize the encoder fault.
4. according to the method described in claim 1-3 any one, it is characterised in that the control encoder stops to change
Pitch driver exports the first incremental signal, controls the simulation increment signal generation circuit to increase to variable pitch driver output second
Amount formula signal includes：
First switch is controlled to disconnect, control second switch closure, the encoder drives via the first switch and the change oar
Dynamic device is connected, and the analog signal generation circuit is connected via the second switch with the variable pitch driver；
The simulation increment signal generation circuit is connected, the simulation increment signal generation circuit exports to the variable pitch driver
Second incremental signal.
5. according to the method for claim 4, it is characterised in that the control first switch disconnects, and control second switch closes
Conjunction includes：
Control the first switch to disconnect by connecting D.C. contactor, control the second switch to close.
6. according to the method for claim 5, it is characterised in that described to connect the simulation increment signal generation circuit bag
Include：
After connecting the D.C. contactor, be delayed prefixed time interval, connects relay to control the 3rd switch to close, and described the
Three switch closures, which characterize, connects the simulation increment signal generation circuit.
7. according to the method described in claim 1-6 any one, it is characterised in that methods described also includes：
Reset signal is sent to the variable pitch driver, the reset signal is resetted for triggering the variable pitch driver.
8. according to the method described in claim 1-6 any one, it is characterised in that methods described also includes：
Monitor whether to trigger limit switch；
When triggering the limit switch, the variable pitch driver is controlled to be stopped.
9. a kind of control circuit put away the oars, it is characterised in that the circuit includes：
Pitch control device, encoder, variable pitch driver, and simulation increment signal generation circuit；
The pitch control device electrically connects with the simulation increment signal generation circuit, the encoder and the variable pitch driver
Electrical connection, the simulation increment signal generation circuit electrically connect with the variable pitch driver；
Whether the pitch control device monitoring encoder breaks down, when it is determined that the encoder breaks down, described in control
Encoder stops exporting the first incremental signal to the variable pitch driver, and controls the simulation increment signal generation circuit
The second incremental signal is exported to the variable pitch driver.
10. circuit according to claim 9, it is characterised in that the circuit also includes：
First switch, and second switch；
The encoder electrically connects via the first switch with the variable pitch driver, the simulation increment signal generation circuit
Electrically connected via the second switch with the variable pitch driver；
The pitch control device controls the first switch to disconnect, make it that it is defeated to the variable pitch driver that the encoder stops
Go out the first incremental signal；The pitch control device controls the second switch closure, to cause the simulation increment signal to produce
Raw circuit exports the second incremental signal to the variable pitch driver.
11. circuit according to claim 10, it is characterised in that the circuit also includes：
D.C. contactor, the D.C. contactor electrically connect with the pitch control device；
The D.C. contactor, for when connecting, controlling the first switch to disconnect, and the second switch is controlled to close.
12. circuit according to claim 11, it is characterised in that the circuit also includes：
3rd switch, and relay, the relay electrically connect with the pitch control device, and the pitch control device is via institute
The 3rd switch is stated to electrically connect with the simulation increment signal generation circuit；
After the pitch control device connects the D.C. contactor, be delayed prefixed time interval, connects the relay；
The relay, for when connecting, controlling the described 3rd to switch closure, the described 3rd switchs described in closure sign connection
Simulate the working power of increment signal generation circuit.
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| CN201610779589.9A CN107781104B (en) | 2016-08-30 | 2016-08-30 | Control method and control circuit for propeller retracting |
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