CN109510424A - Coal mine disconnecting switch disjunction test direct-drive motor mechanism and its control system - Google Patents
Coal mine disconnecting switch disjunction test direct-drive motor mechanism and its control system Download PDFInfo
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- CN109510424A CN109510424A CN201811545257.XA CN201811545257A CN109510424A CN 109510424 A CN109510424 A CN 109510424A CN 201811545257 A CN201811545257 A CN 201811545257A CN 109510424 A CN109510424 A CN 109510424A
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- 239000003245 coal Substances 0.000 title claims abstract description 73
- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 230000007246 mechanism Effects 0.000 title claims abstract description 32
- 230000033001 locomotion Effects 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- -1 angular transducer Substances 0.000 claims abstract description 3
- 239000003990 capacitor Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 14
- 230000003321 amplification Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims 1
- 230000001186 cumulative effect Effects 0.000 abstract description 3
- 230000008520 organization Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 7
- 230000001052 transient effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/24—Arrangements for stopping
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
This patent belongs to coal mine electrical test technical field, coal mine disconnecting switch disjunction test direct-drive motor mechanism, including with dual-output motor, limiter, magnet steel, angular transducer, coal mine disconnecting switch and flange, wherein magnet steel is arranged on the first extension end of main shaft of dual-output motor, and angular transducer is fixed on the first extension end of dual-output motor top, second extension end of dual-output motor main shaft is connected by flange with the main shaft of coal mine disconnecting switch, torque sensor is mounted on the coal mine disconnecting switch main shaft between flange and coal mine disconnecting switch, on the shell for the dual-output motor that limiter is connected to by the second extension end of dual-output motor main shaft, direct-drive motor organization volume is small, structure is simple, cumulative movement tolerance is small, stability is good.In addition, the present invention also provides a kind of coal mine disconnecting switch disjunction test direct-driving electric machine control systems.
Description
Technical field
This patent belongs to coal mine electrical test technical field, in particular to a kind of coal mine disconnecting switch disjunction test is driven with straight
Formula motor mechanism, the intelligence suitable for coal mine disconnecting switch test operation.
Background technique
Coal mine disconnecting switch is the critical elements of the equipment such as starter for mine, electric cabinet and feeding switch, is risen in power grid
To the effect of power supply and equipment electrical isolation, product quality quality is directly related to Safety of Coal Mine Production and stabilization of power grids fortune
Row.Currently, mode of operation is driven with pneumatic mechanism using pulling when coal mine disconnecting switch disjunction is tested, these modes operate multiple
It is miscellaneous, stability is low, poor controllability, exist simultaneously security risk.
Summary of the invention
To solve the above problems, the present invention provides a kind of coal mine disconnecting switch disjunction test direct-drive motor mechanism,
It can be tracked by the transient torque to motor mechanism action process and adjust control realization coal mine disconnecting switch actual motion disjunction
Work condition analogue.
To achieve the above object, the technical solution adopted by the present invention is that:
In first technical solution, coal mine disconnecting switch disjunction test direct-drive motor mechanism, including with lose-lose
Motor, limiter, magnet steel, angular transducer, coal mine disconnecting switch and flange out, wherein the master of dual-output motor is arranged in magnet steel
On the first extension end of axis, and angular transducer is fixed on the first extension end of dual-output motor top, and the of dual-output motor main shaft
Two extension ends are connected with the main shaft of coal mine disconnecting switch by flange, torque sensor be mounted on flange and coal mine disconnecting switch it
Between coal mine disconnecting switch main shaft on, dual-output motor that limiter is connected to by the second extension end of dual-output motor main shaft
On shell.
In first technical solution, preferably, the dual-output motor is permanent-magnet brushless DC electric machine.
In second technical solution, coal mine disconnecting switch disjunction test direct-driving electric machine control system is included in the
Coal mine disconnecting switch disjunction test direct-drive motor mechanism, voltage controller power source, D.C. contactor, rectification in one technical solution
Unit, capacitor group, DSP, IGBT drive circuit, bridge drive circuit, signal amplification circuit, signal processing circuit, control plane
Direct-drive motor is used in plate, display driver circuit, display screen and current detecting unit composition, wherein coal mine disconnecting switch disjunction test
Input end of analog signal of the signal output end Jing Guo signal processing circuit and DSP of the angular transducer of mechanism, torque sensor
It is connected；The input terminal of voltage controller power source is connected with extraneous power grid, the output end of voltage controller power source and the input terminal phase of rectification unit
Connection, the output positive and negative charge of rectification unit are connected with the voltage input end of D.C. contactor, and the voltage of D.C. contactor is defeated
The positive and negative anodes of outlet and capacitor group are respectively connected with, the power input of the positive and negative anodes and bridge drive circuit of capacitor group
Positive and negative anodes are respectively connected with；The control signal output of DSP is connected with the input terminal of IGBT drive circuit, signal amplification circuit
It connects, the output end of signal amplification circuit is connected with the signal control terminal of D.C. contactor, the signal output of IGBT drive circuit
End is connected with the control signal input of bridge drive circuit, the output end of control panel and the digital signal input end of DSP
Son is connected, and the input terminal of display driver circuit is connected with the signal output end of DSP, the output end of display driver circuit and aobvious
The signal input part of display screen is connected, and direct-drive motor is used in the measurement end of current detecting unit and coal mine disconnecting switch disjunction test
The winding of mechanism is connected, and the signal output end of current detecting unit is connected with the input end of analog signal of DSP, voltage detecting
The measurement end of unit is connected with two phase windings of coal mine disconnecting switch disjunction test direct-drive motor mechanism, voltage detecting list
The signal output end of member is connected with the input end of analog signal of DSP, the protection signal output end and central control system of DSP
Signal input part is connected.
In second technical solution, preferably, the DSP is DSP minimum system.
In second technical solution, preferably, the coal mine disconnecting switch disjunction test direct-drive motor control
The control method of system processed is as follows:
Step 1, first system initialization；
After step 2, system initialization, capacitor group 12 is charged；
Step 3, the voltage value for judging capacitor group 12 carry out step 4 as the voltage value of capacitor group 12 meets threshold value, no
Then return step 2；
Step 4, etc. breaking operation program command to be called, such as order enter step 5 to execute, such as order is forbids, then
Return step 3；
Step 5, into call breaking operation program, record data after terminate.
In second technical solution, preferably, breaking operation program executes according to the following steps:
Step A: 4 information of detection angles sensor judges whether to need commutation, needs to then follow the steps B, otherwise execute step
Rapid C；
Step B: calling IGBT conducting relationship and driving signal relation table, change the state of power tube, to machine winding into
Row commutation；
Step C: according to 21 value of feedback of torque sensor, judge whether to reach the free movement stage, execute step if reaching
Rapid D thens follow the steps A if not reaching；
Step D: stop control signal output, motor mechanism free movement, while whether real-time detection reaches home position；
Step E: position of whether reaching home reaches and executes step F, does not reach and executes step D；
Step F: electric braking on motor mechanism；
Step G: it returns.
In second technical solution, preferably, the coal mine disconnecting switch disjunction test direct-drive motor control
The control method of system processed further include:
Interference data: the position signal of DSP acquisition angles sensor feedback are rejected, it, will since second position signal
The position signal and a preceding signal acquired every time carries out doing difference operation, position rate is obtained, from second position rate
Start to be compared with previous position rate, if comparison result excessively threshold value, judges the position signal to interfere number
According to rejecting interference data.
Using the beneficial effects of the present invention are:
Coal mine disconnecting switch disjunction test is small with direct-drive motor organization volume, structure is simple, cumulative movement tolerance is small, steady
It is qualitative good；Control is adjusted to the tracking of the transient torque of motor mechanism action process using power electronic technique, improve coal mine every
The controllability for closing disjunction test process is left, the demand for development of national intelligent electrical apparatus is met.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that direct-drive motor mechanism is used in coal mine disconnecting switch disjunction of the present invention test.
Fig. 2 is coal mine disconnecting switch disjunction of the present invention test direct-drive motor Control system architecture block diagram.
Fig. 3 is the operation logic figure that direct-driving electric machine control system is used in coal mine disconnecting switch disjunction of the present invention test.
Fig. 4 is coal mine disconnecting switch disjunction of the present invention test direct-driving electric machine control system breaking operation operation logic
Figure.
Appended drawing reference includes:
1. dual-output motor；2. limiter；3. magnet steel；4. angular transducer；5. flange；6 coal mine disconnecting switch；7.DSP；
8. signal processing circuit；9. motor mechanism；10.IGBT driving circuit；11. bridge drive circuit；12. capacitor group；13. direct current
Contactor；14. signal amplification circuit；15. rectification unit；16. voltage controller power source；17. display screen；18. display driver circuit；19.
Control panel；20. current detecting unit；21. torque sensor；22. voltage detection unit；23. central control system.
Specific embodiment
The present invention is described in detail below in conjunction with attached drawing.
As shown in Figure 1, coal mine disconnecting switch disjunction test direct-drive motor provided in this embodiment, including with lose-lose
Motor 1, limiter 2, magnet steel 3, angular transducer 4, coal mine disconnecting switch 6 and flange 5 out, wherein magnet steel 3 is arranged in dual output
On the first extension end of main shaft of motor 1, and angular transducer 4 is fixed on 1 first extension end top of dual-output motor, dual output electricity
Second extension end of 1 main shaft of machine is connected by flange 5 with the main shaft of coal mine disconnecting switch 6, and torque sensor 21 is mounted on flange 5
On 6 main shaft of coal mine disconnecting switch between coal mine disconnecting switch 6, limiter 2 passes through 1 the second extension end of main shaft of dual-output motor
On the shell for the dual-output motor 1 being connected to.
Preferably, dual-output motor 1 is permanent-magnet brushless DC electric machine.Coal mine disconnecting switch disjunction test in Fig. 1
With the motor mechanism 9 that direct-drive motor is in Fig. 2.
As shown in figs 2-4, coal mine disconnecting switch disjunction test direct-driving electric machine control system, is included in first skill
Motor mechanism 9, voltage controller power source 16, D.C. contactor 13, rectification unit 15, capacitor group 12, DSP7, IGBT in art scheme drive
Dynamic circuit 10, bridge drive circuit 11, signal amplification circuit 14, signal processing circuit 8, control panel 19, display driver circuit
18, display screen 17 and current detecting unit 20 form, wherein the signal of the angular transducer 4 of motor mechanism 9, torque sensor 21
Output end is connected by signal processing circuit 8 with the input end of analog signal of DSP7；The input terminal of voltage controller power source 16 and the external world
Power grid is connected, and the output end of voltage controller power source 16 is connected with the input terminal of rectification unit 15, and the output of rectification unit 15 is rectified
Cathode is connected with the voltage input end of D.C. contactor 13, and the voltage output end and capacitor group 12 of D.C. contactor 13 are just
Cathode is respectively connected with, and the positive and negative anodes of the power input of the positive and negative anodes and bridge drive circuit 11 of capacitor group 12 are respectively connected with
It connects；The control signal output of DSP7 is connected with the input terminal of IGBT drive circuit 10, signal amplification circuit 14, signal amplification
The output end of circuit 14 is connected with the signal control terminal of D.C. contactor 13, the signal output end and bridge of IGBT drive circuit 10
The control signal input of formula driving circuit 11 is connected, the output end of control panel 19 and digital signal input end of DSP7
It is connected, the input terminal of display driver circuit 18 is connected with the signal output end of DSP7, the output end of display driver circuit 18
It is connected with the signal input part of display screen 17, the measurement end of current detecting unit 20 is connected with the winding of motor mechanism 9, electricity
Stream detection unit 20 signal output end be connected with the input end of analog signal of DSP7, the measurement end of voltage detection unit 22 with
Two phase windings of motor mechanism 9 are connected, the input end of analog signal phase of the signal output end and DSP7 of voltage detection unit 22
Connection, the protection signal output end of DSP7 are connected with the signal input part of central control system 23.
Coal mine disconnecting switch breaking course is as follows: disjunction external operation early period power be applied to 6 shaft of coal mine disconnecting switch to
Energy-stored spring deformation is pulled, 6 transmission mechanism of later period coal mine disconnecting switch crosses dead point energy-stored spring and restores deformation, coal mine disconnecting switch
6 free movements are to open position.It is tracked using transient torque and adjusts control technology, DSP7 dtc signal carries out calculation process and arrives
It controls signal after up to maximum torque point to stop, 1 output torque of dual-output motor is zero, and coal mine disconnecting switch 6 is in own institutions band
Continue to move under dynamic, realizes actual motion disjunction Work condition analogue.Since coal mine disconnecting switch 6 has commutation function (forward and reverse double
To operation, above-mentioned action process is defined as forward direction), it can also reversely close a floodgate behind final position, lose-lose after disjunction to final position
The braking of motor 1 limit cooperates with mechanical limiting mechanism out, achievees the effect that double limitation, realizes the guarantor to entire pilot system
Shield.
Operation is cooperateed with current signal using torque, transient torque is tracked and adjusts control process coal mine disconnecting switch 6 most
Big torque point is judged.DSP7 acquires torque and current signal in real time (1 millisecond is adopted after coal mine disconnecting switch disjunction on-test
Collection 10 times), difference operation is done to front and back torque twice and current signal, if torque and continuous 10 operation results of current signal
Think to reach maximum torque point less than zero.
IGBT drive circuit 10 realizes that the PWM output signal of DSP7 protects the isolation drive and failure of bridge drive circuit 11
Shield；The turn-on sequence of the control machine winding current of bridge drive circuit 11；Amplifying circuit realizes the amplification of DSP7 output signal, realizes
Effectively D.C. contactor 13 is controlled；Current detecting unit 20 and voltage detection unit 22 have sensor and signal conversion electricity
Road composition, realizes the detection to machine winding current and phase voltage；Signal processing circuit 8 is divided for analog signal processing branch sum number
Word signal processing branch two is realized and is matched between the receivable signal of DSP7 to dtc signal, position signal.
In the present embodiment, DSP7 is DSP minimum system.
Preferably, dual-output motor 1 is permanent-magnet brushless DC electric machine.Coal mine disconnecting switch disjunction test in Fig. 1
With the motor mechanism 9 that direct-drive motor is in Fig. 2.
As shown in figure 3, coal mine disconnecting switch disjunction test is patrolled with the operation of direct-driving electric machine control system in the present embodiment
It is volume as follows,
Step 1, first system initialization；
After step 2, system initialization, capacitor group 12 is charged；
Step 3, the voltage value for judging capacitor group 12 carry out step 4 as the voltage value of capacitor group 12 meets threshold value, no
Then return step 2；
Step 4, etc. breaking operation program command to be called, such as order enter step 5 to execute, such as order is forbids, then
Return step 3；
Step 5, into call breaking operation program, record data after terminate.
In operation logic of the above-mentioned coal mine disconnecting switch disjunction test with direct-driving electric machine control system, breaking operation
Subprogram executes according to the following steps:
Step A: 4 information of detection angles sensor judges whether to need commutation, needs to then follow the steps B, otherwise execute step
Rapid C；
Step B: calling IGBT conducting relationship and driving signal relation table, change the state of power tube, to machine winding into
Row commutation；
Step C: according to 21 value of feedback of torque sensor, judge whether to reach the free movement stage, execute step if reaching
Rapid D thens follow the steps A if not reaching；
Step D: stop control signal output, motor mechanism free movement, while whether real-time detection reaches home position；
Step E: position of whether reaching home reaches and executes step F, does not reach and executes step D；
Step F: electric braking on motor mechanism；
Step G: it returns.
The motor mechanism position signal of acquisition and pre-set parameter are compared, judge whether to reach free movement stage and end
Point position.Interference signal causes control system to malfunction in order to prevent, shields interference signal technology using software program, DSP7 is adopted
The position signal for collecting angular transducer feedback, since second position signal, by the position signal acquired every time and preceding primary
Signal carries out doing difference operation, obtains position rate, carries out since second position rate with previous position rate
Compare, if comparison result is excessively high, judges the position signal to interfere data.
By above embodiments, it can be concluded that, this coal mine disconnecting switch disjunction test is with direct-drive motor is small in size, structure
Simply, cumulative movement tolerance is small, stability is good；It is tracked and is adjusted using transient torque of the power electronic technique to motor action process
Control improves the controllability of coal mine disconnecting switch disjunction test process, meets the demand for development of national intelligent electrical apparatus.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, in specific embodiments and applications can be with many changes may be made, as long as these variations are without departing from structure of the invention
Think, all belongs to the scope of protection of the present invention.
Claims (7)
1. coal mine disconnecting switch disjunction test direct-drive motor mechanism, it is characterised in that: including with dual-output motor, limit
Device, magnet steel, angular transducer, coal mine disconnecting switch and flange, the main shaft first that wherein dual-output motor is arranged in magnet steel stretch out
On end, and angular transducer is fixed on the first extension end of dual-output motor top, and the second extension end of dual-output motor main shaft is logical
Flange is crossed to connect with the main shaft of coal mine disconnecting switch, torque sensor be mounted on the coal mine between flange and coal mine disconnecting switch every
From in switch spindle, on the shell for the dual-output motor that limiter is connected to by the second extension end of dual-output motor main shaft.
2. coal mine disconnecting switch disjunction test according to claim 1 direct-drive motor mechanism, it is characterised in that: described
Dual-output motor is permanent-magnet brushless DC electric machine.
3. coal mine disconnecting switch disjunction test direct-driving electric machine control system, it is characterised in that: including such as claims 1 or 2
Coal mine disconnecting switch disjunction test the direct-drive motor mechanism, voltage controller power source, D.C. contactor, rectification unit, capacitor
Device group, DSP, IGBT drive circuit, bridge drive circuit, signal amplification circuit, signal processing circuit, control panel, display are driven
Dynamic circuit, display screen and current detecting unit composition, wherein the angle of direct-drive motor mechanism is used in coal mine disconnecting switch disjunction test
Spend sensor, the signal output end of torque sensor is connected by signal processing circuit with the input end of analog signal of DSP；It adjusts
The input terminal of voltage source is connected with extraneous power grid, and the output end of voltage controller power source is connected with the input terminal of rectification unit, rectification
The output positive and negative charge of unit is connected with the voltage input end of D.C. contactor, the voltage output end and capacitor of D.C. contactor
The positive and negative anodes of device group are respectively connected with, the positive and negative anodes difference of the power input of the positive and negative anodes and bridge drive circuit of capacitor group
It is connected；The control signal output of DSP is connected with the input terminal of IGBT drive circuit, signal amplification circuit, signal amplification
The output end of circuit is connected with the signal control terminal of D.C. contactor, signal output end and the bridge-type driving of IGBT drive circuit
The control signal input of circuit is connected, and the output end of control panel is connected with digital signal input end of DSP, display
The input terminal of driving circuit is connected with the signal output end of DSP, and the output end of display driver circuit and the signal of display screen are defeated
Enter end to be connected, the measurement end of current detecting unit uses the winding phase of direct-drive motor mechanism with coal mine disconnecting switch disjunction test
Connection, the signal output end of current detecting unit are connected with the input end of analog signal of DSP, the measurement end of voltage detection unit
It is connected with two phase windings of coal mine disconnecting switch disjunction test direct-drive motor mechanism, the signal output of voltage detection unit
End is connected with the input end of analog signal of DSP, the signal input part phase of the protection signal output end and central control system of DSP
Connection.
4. coal mine disconnecting switch disjunction test direct-driving electric machine control system according to claim 3, it is characterised in that:
The DSP is DSP minimum system.
5. coal mine disconnecting switch disjunction test direct-driving electric machine control system according to claim 3, it is characterised in that:
The control method of the coal mine disconnecting switch disjunction test direct-driving electric machine control system is as follows:
Step 1, first system initialization；
After step 2, system initialization, capacitor group 12 is charged；
Step 3, the voltage value for judging capacitor group 12 carry out step 4 as the voltage value of capacitor group 12 meets threshold value, otherwise return
Return step 2；
Step 4, etc. breaking operation program command to be called, such as order enter step 5 to execute, such as order then returns to forbid
Step 3；
Step 5, into call breaking operation program, record data after terminate.
6. coal mine disconnecting switch disjunction test direct-driving electric machine control system according to claim 5, it is characterised in that:
Breaking operation program executes according to the following steps:
Step A: 4 information of detection angles sensor judges whether to need commutation, needs to then follow the steps B, no to then follow the steps C；
Step B: IGBT conducting relationship and driving signal relation table are called, changes the state of power tube, machine winding is changed
Phase；
Step C: according to torque sensor value of feedback, judging whether to reach the free movement stage, then follow the steps D if reaching, if
It does not reach, thens follow the steps A；
Step D: stop control signal output, motor mechanism free movement, while whether real-time detection reaches home position；
Step E: position of whether reaching home reaches and executes step F, does not reach and executes step D；
Step F: electric braking on motor mechanism；
Step G: it returns.
7. coal mine disconnecting switch disjunction test direct-driving electric machine control system according to claim 5, it is characterised in that:
The coal mine disconnecting switch disjunction test control method of direct-driving electric machine control system further include:
Reject interference data: the position signal of DSP acquisition angles sensor feedback will be each since second position signal
The position signal of acquisition and a preceding signal carry out doing difference operation, position rate are obtained, since second position rate
It is compared with previous position rate, if comparison result excessively threshold value, judges that the position signal to interfere data, picks
Except interference data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811545257.XA CN109510424B (en) | 2018-12-17 | 2018-12-17 | Direct-drive motor mechanism for breaking test of coal mine isolating switch and control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811545257.XA CN109510424B (en) | 2018-12-17 | 2018-12-17 | Direct-drive motor mechanism for breaking test of coal mine isolating switch and control system thereof |
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| CN109510424B CN109510424B (en) | 2024-08-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113783392A (en) * | 2021-09-09 | 2021-12-10 | 芜湖德力电机有限公司 | Brushless direct current motor control method |
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