CN101267174A - Start method and device for brushless dual-feedback electromotor - Google Patents
Start method and device for brushless dual-feedback electromotor Download PDFInfo
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- CN101267174A CN101267174A CNA2008100194957A CN200810019495A CN101267174A CN 101267174 A CN101267174 A CN 101267174A CN A2008100194957 A CNA2008100194957 A CN A2008100194957A CN 200810019495 A CN200810019495 A CN 200810019495A CN 101267174 A CN101267174 A CN 101267174A
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Abstract
The present invention provides a method for actuating a brushless double-feed electric motor and the device thereof. The actuating method comprises the following procedures: executing self-checking to the transducer and controller before the actuation of the brushless double-feed electric motor; controlling a winding series resistance by the brushless double-feed electric motor, energizing a power winding for asynchronous actuating; taking the asynchronous steady speed at this time as a synchronous steady speed of double-feed operation, leading to that the transducer outputs the corresponding frequency, disconnecting the control winding from the staring resistance, switching to the transducer for electric supply, and changing the operation mode of the electric motor from asynchronous mode to double-feed operation mode at this time; and adjusting the output frequency of the transducer by the controller according rotating speed and the datum speed of the electric motor until the requirement of rotating speed of the electric motor is satisfied. The control device is composed of a power winding, a control winding, a stator of the brushless double-feed electric motor and a rotor of the brushless double-feed electric motor. The device of the invention has the advantages of small current impact, small electrical torque and oscillation amplitude of the rotating speed, less number, small mechanical impact, excellent protection to the electric motor, reduction of impact to the electric network, and effective reduction to the actuating capacity of the transducer of the control winding.
Description
Technical field
The present invention relates to the startup method and the device of brushless dual-feed motor, be particularly useful for the brushless dual-feed motor of cage type rotor structure.
Background technology
Brushless dual-feed motor is a kind of New-type electric machine with speed governing advantage, and this motor has brushless, and is firm reliable, the advantage that required frequency inverter capacity is low, having a extensive future in blower fan and water pump.
Current, the research of brushless dual-feed motor there are two aspects, aspect is to the design of motor body electromagnetic structure and improves research, enters practicability as early as possible to impel brushless dual-feed motor; Another aspect is the research to motor control method, at present, the control method of motor also is in theoretical research stage at home.
Brushless dual-feed motor from start to control frequency lead into power-frequency be the transient process of a complexity synchronously, because there is machinery inertial in the unit rotating part, rotating speed can not suddenly change to the synchronism stability state, the electromagnet inertia that exists in the motor windings, the variation of operating current also can not suddenly change to stable state.The sinusoidal variations rule is satisfied at the size of brushless dual-feed motor electromagnetic torque and merit angle, wherein the merit angle is the angle between the voltage vector of the rotor electromotive force vector that produces of control winding excitation and power winding, when motor speed suddenlyd change, the merit angle can change thereupon, and electromagnetic torque also changes.If lead into before slip big, the merit angle is followed and is changed just slowly, electromagnetic torque and rotating speed need vibrate behind the several times, just may reach synchronous regime, electric current also could be stablized, too strong in the vibration of start-up course medium speed, motor just can not be pulled into synchronously.
Compare with common asynchronous moter, the complex structure of brushless dual-feed motor makes difficulty of its startup and control ratio, and particularly the impulse current of motor in start-up course is bigger, causes the vibration of motor overheating and torque.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structurely, start easily and control the startup method and the device of the brushless dual-feed motor that impulse current is little.
The startup method of brushless dual-feed motor of the present invention:
A. before brushless dual-feed motor starts, frequency converter and the POST of controller elder generation;
B. brushless dual-feed motor control winding crosstalk resistance, power winding energising asynchronous starting;
C. after asynchronous starting finished, controller detected motor speed by speed probe, with the synchronism stability speed that the asynchronous stabilized speed of this moment is moved as double-fed, made the frequency converter output frequency corresponding with stabilized speed; And will control winding and disconnect from starting resistance, switching to inverter supply, this moment, the motor operational mode changed the double-fed operational mode into by asynchronous mode;
D. work as motor and enter after the double-fed operational mode, controller is according to the output frequency of motor speed and given speed adjusting frequency converter, till motor speed reaches requirement.
The input power supply of described frequency converter and the power supply of power of motor winding are the three-phase alternating-current supply of identical or different electric pressure; The resistance that described control winding seals in is the three-phase synistor, and its every phase resistance size is 6～10 times of the every phase stator resistance of control winding; The output frequency that described controller is regulated frequency converter according to the rotating speed formula and the given speed of double-fed operation.
The starting drive of brushless dual-feed motor of the present invention: brushless dual-feed motor is made of power winding, control winding, the stator of brushless dual-feed motor and the rotor of brushless dual-feed motor, the control winding is connected with three symmetrical starting resistances by the starting resistance diverter switch, also be connected with reversible frequency converter by the frequency converter switch simultaneously, reversible frequency converter input is connected with frequency converter three-phase alternating current input power supply; Output is connected with controller, and controller is connected with power winding voltage current sensing means with velocity transducer, and velocity transducer is installed in the brushless dual-feed motor; Power winding and power winding voltage current sensing means, brushless double-fed acc power winding electric source switch and brushless double-fed acc power winding three-phase AC power are linked in sequence.
The number of pole-pairs of described power winding is P
p, the number of pole-pairs of control winding is P
c, P
p〉=2P
c
The startup method and the device of brushless dual-feed motor of the present invention, series resistor in brushless dual-feed motor control winding, the control winding is to the negative interaction of brushless dual-feed motor when reducing asynchronous starting, after brushless dual-feed motor finishes with the startup of asynchronous working state, this moment, the asynchronous speed of motor was very stable, and with the synchronism stability speed of this speed as the double-fed operation, the output frequency of adjusting frequency converter is corresponding with the frequency of this asynchronous stabilized speed; To control winding and disconnect from starting resistance, and switch to by inverter supply, this moment, motor steadily changed the double-fed operational mode into by the asynchronous operation pattern; Regulate electric machine controller, directly to motor enforcement control, the slip before pulling in can reach zero, and the merit angle is followed and changed soon, and electromagnetic torque and rotating speed be not vibration almost, just can reach synchronous regime.Can realize asynchronous starting control to brushless dual-feed motor easily, in process that brushless dual-feed motor is pulled in, rush of current is little, electromagnetic torque and the speed oscillation amplitude is little, number of times is few, mechanical shock is little, protected motor well, reduced impact, reduced the startup capacity of control winding frequency converter effectively electrical network; When control winding frequency converter breaks down, disconnect frequency converter by switch, thereby allow the motor asynchronous operation improve the reliability of dragging system, when starting brushless dual-feed motor, impulse current when having reduced startup effectively makes the motor smooth starting, the rotating speed transitions smooth, torque oscillation reduces.
Description of drawings
Accompanying drawing is the installation drawing of brushless dual-feed motor of the present invention.
Among the figure: 1-frequency converter three-phase alternating current input power supply; 2-three symmetrical starting resistances; The reversible frequency converter of 3-; 4-frequency converter switch; 5-starting resistance diverter switch; The 6-controller; The 7-velocity transducer; 8-power winding three-phase AC power; 9-power winding electric source switch; 10-power winding voltage current sensing means; 11-power winding; 12-controls winding; The stator of 13-brushless dual-feed motor; The rotor of 14-brushless dual-feed motor.
Embodiment
The startup method of brushless dual-feed motor of the present invention seals in the suitable three-phase synistor of resistance for before startup the control winding, carries out power winding list feedback asynchronous starting then.The purpose of crosstalk resistance is in order to prevent that controlling winding high pressure occurs, can to make motor keep bigger asynchronous starting moment simultaneously.After the motor asynchronous starting finishes, need enter double-fed synchronous operation for the energising of control winding, when switching to double-fed synchronous operation by asynchronous starting, motor has a synchronizing process, if asynchronous speed and last stable synchronous speed differ too big, the winding impulse current of motor will be bigger, and torque ripple is also big.In order to reduce the impact of transient process, when switching to double-fed synchronous operation, double-fed is moved synchronizing speed be made as and the identical value of asynchronous speed size by asynchronous operation, can realize by the output frequency of control of conversion device.
Adopt double-fed synchronous operation speed n
rCalculating formula:
n
r＝60(f
p+f
c)/(P
p+P
c) (1)
In the formula: f
pExpression power winding electric source frequency; f
cThe frequency converter out-put supply frequency of expression control winding, during positive phase sequence be on the occasion of, be negative value during negative-phase sequence.
Detect motor asynchronous operation speed n by velocity transducer
1, with its stablizing as the double-fed operation with leg speed n
r, i.e. n
1=n
rDraw frequency converter output frequency f according to formula (1)
cCalculating formula be:
f
c＝n
r(P
p+P
c)/60-f
p (2)
After the motor double-fed was synchronous, the output frequency that controller is progressively regulated frequency converter according to formula (2) and given rotating speed reached requirement up to motor speed, thereby made motor realize smooth starting.
The number of pole-pairs Pp=3 of embodiment one, employing power winding, the number of pole-pairs Pc=1 of control winding, power winding supply voltage 380V, control winding converter power supply voltage is 220V, rated power 2KW, asynchronous stabilized speed is 960 rev/mins when unloaded, given speed is 810 rev/mins, every phase resistance size of three symmetrical starting resistances is 8 times of the every phase stator resistance of control winding, and frequency-variable controller adopts two PWM voltage frequency converters.
Concrete startup method is as follows:
A. before brushless dual-feed motor starts, keep frequency converter switch 4 to disconnect, closed starting resistance diverter switch 5 seals in the control winding with three symmetrical starting resistances 2; Reversible frequency converter 3 and controller 6 power-on self-tests, and start working;
B. closed power winding electric source switch 9, power winding 11 energisings of brushless dual-feed motor, brushless dual-feed motor begins asynchronous starting; Controller 6 detects motor asynchronous speed n by velocity transducer 7
1, according to formula f
c=n
r(P
p+ P
c)/60-f
pCalculate the output frequency f of frequency converter
c
C. after the motor asynchronous starting finished, closed frequency converter switch 4 disconnected starting resistance diverter switch 5, and starting resistance is disconnected from the control winding, was connected to reversible frequency converter 3 feeds, and motor enters the double-fed operational mode, with the asynchronous stabilized speed n of this moment
1=960 rev/mins of synchronism stability speed n as the double-fed operation
r, make the frequency converter output frequency f corresponding with stabilized speed
c=n
r(P
p+ P
c)/60-f
p=14Hz;
D. controller 6 is by sensor motor speed n
r, according to formula (2) calculation control winding frequency f
c, and progressively regulate the output frequency f of frequency converter according to 810 rev/mins of given rotating speeds
c, reaching 810 rev/mins of set-points up to motor speed, this moment, the output frequency of frequency converter was 4Hz, startup is finished.
Shown in the accompanying drawing, realize the control device of invention brushless dual-feed motor startup method, constitute, wherein comprise power winding 11,12 liang of covers of control winding winding in the stator by stator 13 and rotor 14, wherein the number of pole-pairs of power winding 11 is 3, and the number of pole-pairs of control winding 12 is 1.Control winding 12 is connected with three symmetrical starting resistances 2 by starting resistance diverter switch 5, is connected with reversible frequency converter 3 by frequency converter switch 4 simultaneously, and frequency converter output switch 4 is used for the break-make between output of control of conversion device and the control winding; Starting resistance switch 5 is used to control the break-make between starting resistance and control winding.Reversible frequency converter 3 inputs are connected with frequency converter three-phase alternating current input power supply 1; Output is connected with controller 6, and controller is connected with power winding voltage current sensing means 10 with velocity transducer 7, and velocity transducer 7 is installed in the brushless dual-feed motor rotating shaft; Power winding 11 is linked in sequence with power winding voltage current sensing means 10, brushless double-fed acc power winding electric source switch 9 and brushless double-fed acc power winding three-phase AC power 8.Brushless double-fed acc power winding electric source switch 9 is used for the break-make of power controlling winding and power winding power supply.Velocity transducer 7 is used for detecting in real time motor speed, and tach signal is delivered to controller 6.Controller 6 connection frequency converters 3, velocity transducer 7, brushless double-fed acc power winding voltage current sensing means 10 are Master Control Units of brushless dual-feed motor system.Frequency converter 3 provides frequency and all variable AC power of size for the control winding when double-fed is moved.Power winding voltage current sensing means 10 is used for real-time detection power winding three-phase power input voltage and current signal, and with signal transmitting to controller 10.
The resistance that embodiment two, control winding seal in is the three-phase synistor, and its every phase resistance size is 6 times of the every phase stator resistance of control winding.Other and embodiment 1 omit together.
The resistance that embodiment three, control winding seal in is the three-phase synistor, and its every phase resistance size is 10 times of the every phase stator resistance of control winding.Other and embodiment 1 omit together.
Claims (7)
1, a kind of startup method of brushless dual-feed motor is characterized in that:
A. before brushless dual-feed motor starts, frequency converter and the POST of controller elder generation;
B. brushless dual-feed motor control winding crosstalk resistance, power winding energising asynchronous starting;
C. after asynchronous starting finished, controller detected motor speed by speed probe, with the synchronism stability speed that the asynchronous stabilized speed of this moment is moved as double-fed, made the frequency converter output frequency corresponding with stabilized speed; And will control winding and disconnect from starting resistance, switching to inverter supply, this moment, the motor operational mode changed the double-fed operational mode into by asynchronous mode;
D. work as motor and enter after the double-fed operational mode, controller is according to the output frequency of motor speed and given speed adjusting frequency converter, till motor speed reaches requirement.
2, according to the startup method of the brushless dual-feed motor described in the claim 1, it is characterized in that: the input power supply of described frequency converter and the power supply of power of motor winding are the three-phase alternating-current supply of identical or different electric pressure.
3, according to the startup method of the brushless dual-feed motor described in the claim 1, it is characterized in that: the resistance that described control winding seals in is the three-phase synistor, and its every phase resistance size is 6～10 times of the every phase stator resistance of control winding.
4, according to the startup method of the brushless dual-feed motor described in the claim 1, it is characterized in that: described controller adopts the rotating speed formula of double-fed operation and the output frequency that given speed is regulated frequency converter.
5, a kind of starting drive of brushless dual-feed motor, it is characterized in that: brushless dual-feed motor is made of stator (13) and rotor (14), wherein comprising power winding (11) in the stator, controlling winding (12) is two cover windings, control winding (12) is connected with three symmetrical starting resistances (2) by starting resistance diverter switch (5), be connected with reversible frequency converter (3) by frequency converter switch (4) simultaneously, reversible frequency converter (3) input is connected with frequency converter three-phase alternating current input power supply (1); Output is connected with controller (6), and controller is connected with power winding voltage current sensing means (10) with velocity transducer (7), and velocity transducer (7) is installed in the brushless dual-feed motor rotating shaft; Power winding (11) is linked in sequence with power winding voltage current sensing means (10), brushless double-fed acc power winding electric source switch (9) and brushless double-fed acc power winding three-phase AC power (8).
6, according to the starting drive of the brushless dual-feed motor described in the claim 5, it is characterized in that: the number of pole-pairs of power winding is P
p, the number of pole-pairs of control winding is P
c, P
p〉=2P
c
7, according to the starting drive of the brushless dual-feed motor described in the claim 5, it is characterized in that: brushless dual-feed motor is a cage type rotor structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100194957A CN101267174A (en) | 2008-01-17 | 2008-01-17 | Start method and device for brushless dual-feedback electromotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100194957A CN101267174A (en) | 2008-01-17 | 2008-01-17 | Start method and device for brushless dual-feedback electromotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101267174A true CN101267174A (en) | 2008-09-17 |
Family
ID=39989372
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100194957A Pending CN101267174A (en) | 2008-01-17 | 2008-01-17 | Start method and device for brushless dual-feedback electromotor |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391356A (en) * | 2015-12-16 | 2016-03-09 | 易事特集团股份有限公司 | Starting control system and method of brushless double-fed motor |
| CN105429557A (en) * | 2015-12-01 | 2016-03-23 | 北京赛思亿电气科技有限公司 | Brushless double-feed motor-based variable frequency speed regulation system |
| CN105471339A (en) * | 2015-12-31 | 2016-04-06 | 易事特集团股份有限公司 | Asynchronous starting device of brushless doubly-fed machine |
| CN105471338A (en) * | 2015-12-31 | 2016-04-06 | 易事特集团股份有限公司 | Starting device of brushless doubly-fed machine |
| CN106208883A (en) * | 2016-08-10 | 2016-12-07 | 北京国电四维清洁能源技术有限公司 | Phase-wound rotor brushless double-fed motor non-impacting start device and startup method |
| CN106230329A (en) * | 2016-08-10 | 2016-12-14 | 北京国电四维清洁能源技术有限公司 | Phase-wound rotor brushless double-fed motor controls device and control method |
| CN106655687A (en) * | 2016-12-30 | 2017-05-10 | 上海同慈特种电机技术有限公司 | Brushless double-fed motor super-synchronization speed control system and motor field orientation vector control method and motor direct torque control method for brushless double-fed motor super-synchronization speed control system |
| CN106685271A (en) * | 2016-08-05 | 2017-05-17 | 湖南利能科技股份有限公司 | Running state control method of brushless double-fed motor |
| CN106953573A (en) * | 2017-03-13 | 2017-07-14 | 湖南利能科技股份有限公司 | A kind of Speed identification method of brushless dual-feed motor |
| CN106953560A (en) * | 2017-03-13 | 2017-07-14 | 湖南利能科技股份有限公司 | A kind of high-voltage brushless double feedback electric engine heavy load starting control system and method |
| CN108306473A (en) * | 2017-12-27 | 2018-07-20 | 华中科技大学 | A kind of setting method of line-start permanent magnetic synchronous motor winding |
| CN108322107A (en) * | 2018-01-29 | 2018-07-24 | 西门子工厂自动化工程有限公司 | Control method, apparatus, system, storage medium and the terminal of brushless dual-feed motor |
| CN109217737A (en) * | 2018-09-26 | 2019-01-15 | 湖南利能科技股份有限公司 | A kind of control system and method for double feedback electric engine |
| CN109643966A (en) * | 2017-03-06 | 2019-04-16 | 深圳市大疆创新科技有限公司 | Electric machine control system, unmanned aerial vehicle control system, unmanned plane and motor protection method |
| CN112421839A (en) * | 2020-11-27 | 2021-02-26 | 陕西航空电气有限责任公司 | Winding structure of brushless direct-current starting generator |
-
2008
- 2008-01-17 CN CNA2008100194957A patent/CN101267174A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429557A (en) * | 2015-12-01 | 2016-03-23 | 北京赛思亿电气科技有限公司 | Brushless double-feed motor-based variable frequency speed regulation system |
| CN105391356A (en) * | 2015-12-16 | 2016-03-09 | 易事特集团股份有限公司 | Starting control system and method of brushless double-fed motor |
| CN105471339B (en) * | 2015-12-31 | 2018-11-23 | 易事特集团股份有限公司 | A kind of asynchronous starting device of brushless double-fed motor |
| CN105471339A (en) * | 2015-12-31 | 2016-04-06 | 易事特集团股份有限公司 | Asynchronous starting device of brushless doubly-fed machine |
| CN105471338A (en) * | 2015-12-31 | 2016-04-06 | 易事特集团股份有限公司 | Starting device of brushless doubly-fed machine |
| CN105471338B (en) * | 2015-12-31 | 2019-02-05 | 易事特集团股份有限公司 | The starter of brushless double-fed motor |
| CN106685271A (en) * | 2016-08-05 | 2017-05-17 | 湖南利能科技股份有限公司 | Running state control method of brushless double-fed motor |
| CN106685271B (en) * | 2016-08-05 | 2019-05-21 | 湖南利能科技股份有限公司 | The operating status control method of brushless dual-feed motor |
| CN106208883A (en) * | 2016-08-10 | 2016-12-07 | 北京国电四维清洁能源技术有限公司 | Phase-wound rotor brushless double-fed motor non-impacting start device and startup method |
| CN106230329A (en) * | 2016-08-10 | 2016-12-14 | 北京国电四维清洁能源技术有限公司 | Phase-wound rotor brushless double-fed motor controls device and control method |
| CN106655687A (en) * | 2016-12-30 | 2017-05-10 | 上海同慈特种电机技术有限公司 | Brushless double-fed motor super-synchronization speed control system and motor field orientation vector control method and motor direct torque control method for brushless double-fed motor super-synchronization speed control system |
| CN109643966A (en) * | 2017-03-06 | 2019-04-16 | 深圳市大疆创新科技有限公司 | Electric machine control system, unmanned aerial vehicle control system, unmanned plane and motor protection method |
| CN109643966B (en) * | 2017-03-06 | 2022-06-21 | 深圳市大疆创新科技有限公司 | Motor control system, unmanned aerial vehicle and motor protection method |
| CN106953560A (en) * | 2017-03-13 | 2017-07-14 | 湖南利能科技股份有限公司 | A kind of high-voltage brushless double feedback electric engine heavy load starting control system and method |
| CN106953573A (en) * | 2017-03-13 | 2017-07-14 | 湖南利能科技股份有限公司 | A kind of Speed identification method of brushless dual-feed motor |
| CN106953560B (en) * | 2017-03-13 | 2023-08-01 | 湖南利能科技股份有限公司 | Heavy-load starting control system and method for high-voltage brushless double-fed motor |
| CN108306473A (en) * | 2017-12-27 | 2018-07-20 | 华中科技大学 | A kind of setting method of line-start permanent magnetic synchronous motor winding |
| CN108322107A (en) * | 2018-01-29 | 2018-07-24 | 西门子工厂自动化工程有限公司 | Control method, apparatus, system, storage medium and the terminal of brushless dual-feed motor |
| CN109217737A (en) * | 2018-09-26 | 2019-01-15 | 湖南利能科技股份有限公司 | A kind of control system and method for double feedback electric engine |
| CN112421839A (en) * | 2020-11-27 | 2021-02-26 | 陕西航空电气有限责任公司 | Winding structure of brushless direct-current starting generator |
| CN112421839B (en) * | 2020-11-27 | 2023-12-19 | 陕西航空电气有限责任公司 | Winding structure of brushless direct current starting generator |
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Open date: 20080917 |