CN106230329A - Phase-wound rotor brushless double-fed motor controls device and control method - Google Patents
Phase-wound rotor brushless double-fed motor controls device and control method Download PDFInfo
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- CN106230329A CN106230329A CN201610654012.5A CN201610654012A CN106230329A CN 106230329 A CN106230329 A CN 106230329A CN 201610654012 A CN201610654012 A CN 201610654012A CN 106230329 A CN106230329 A CN 106230329A
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Abstract
The invention discloses a kind of phase-wound rotor brushless double-fed motor and control device and control method, including: connect the power supply controlling device, control device ready；After controlling device ready, setup parameter in man machine interface；Perform to start operation；Connect power winding power supply；Control the control module in device according to the motor signal detected, execution vector adaptive control algorithm；Control module drives unsteady flow module to realize the output controlling winding；After control device control motor reaches nature synchronous speed, complete non-impacting start process；After having started, control device and run according to the frequency set and torque parameter, control motor lifting speed；When control device breaks down, control device and deactivate, be also turned on controlling the short circuit loop of winding side.
Description
Technical field
The present invention relates to brushless double-fed motor technical field, particularly to a kind of phase-wound rotor brushless double-fed motor
Control device and control method.
Background technology
Brushless double-fed motor is as the novel ac adjustable speed motor of one in recent years, and it is overlapped separate stator by two
Winding (power winding and control winding) and rotor composition, it is right that the supply frequency utilizing the regulation of reversible converter to control winding realizes
The rotating speed of motor controls.Traditional high-power brushless double-fed motor starter uses and controls windings in series resistance or change
Frequently the method for series resistance in the drive circuit within device, small-power brushless double-fed motor uses direct short circuit to control winding
Method.These traditional methods, the current peak of motor is very big, and big electric current can produce impact to power supply, also can be at motor internal
Generate heat in a large number with producing loss in supply line.
Having again certain methods to use first short circuit power winding, transducer drive controls winding and starts, and cuts merit the most again
Rate winding power supply.This type of method still can bring the impact of several times rated current, and motor when cutting power winding power supply
Rotating speed meeting acute variation, totally unfavorable to load running.
At present, the brushless double-fed motor starter of prior art cannot reduce the danger that motor is caused by dash current
Evil, and operating process is complicated, easily occurs operating malfunctioning situation, causes operation troubles；And need to increase short circuit resistance etc.
Matching component, increases cost；And volume is generally large, too much take site space, make troubles to installation and maintenance.
And, prior art can not realize full frequency band control when brushless double-fed motor runs, and runs at some
In frequency range, it may appear that step-out fault, the running frequency scope causing brushless double-fed motor is limited；And prior art control
Brushless double-fed motor processed is pulsed and noise is relatively big, reduces the brushless double-fed motor life-span and affects load running
Steadily；The long period is needed, it is impossible to meet higher to response time requirement during existing brushless double-fed motor lifting frequency
Occasion.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of simple in construction, and processing ease, volume is little, and low cost will not
Occur that motor is worked the mischief by dash current, and the coiling that motor full frequency band smooths, high dynamic response controls can be realized
Formula rotor brushless double feed control device of electric motor and control method.
In order to solve above-mentioned technical problem, the technical scheme is that a kind of phase-wound rotor brushless double-fed motor
Control device, including
Catalyst K1, for the break-make of the power supply of power winding；
Catalyst K2, for controlling the break-make of the power supply of device；
Catalyst K3, for controlling the break-make in short circuit loop, winding side；
Signal acquisition module, for gathering the voltage and current signal of brushless double-fed motor power winding, controlling winding
Voltage and current signal；
Unsteady flow module, the control electric current needed for brushless double-fed motor is exported；
Control module, for receiving the signal of described signal acquisition module, enters according to the signal of described signal acquisition module
Row calculates and controls the output of described unsteady flow blocks current.
Preferably, man machine interface and communication module, described man machine interface and described communication module and described control are also included
Module connects, and described man machine interface and described communication module are for receiving operational order and the operation feelings of feedback system of outside
Condition.
Preferably, the control loop of described catalyst K1, described catalyst K2 and described catalyst K3 and described control mould
Block connects, and described control module is for controlling described catalyst K1, described catalyst K2 and the break-make of described catalyst K3.
Preferably, described signal acquisition module includes current collection circuit and voltage collection circuit.
Preferably, described current collection circuit includes filter circuit and change-over circuit.
Preferably, described voltage collection circuit includes filter circuit and change-over circuit.
The control method of this control device, comprises the following steps:
(1) connect the power supply of control device, control device ready；
(2) after controlling device ready, setup parameter in man machine interface；
(3) perform to start operation；
(4) power winding power supply is connected；
(5) control module in device is controlled according to the motor signal detected, execution vector adaptive control algorithm；
(6) control module drives unsteady flow module to realize the output controlling winding；
(7), after control device control motor reaches nature synchronous speed, non-impacting start process is completed；
(8), after having started, control device, according to the frequency set and torque parameter, continues executing with vector Self Adaptive Control
Algorithm, controls motor lifting speed and runs；
(9) when control device breaks down, control device and deactivate, be also turned on controlling the short circuit loop of winding side.
Further, described vector adaptive control algorithm comprises the following steps:
(1) according to the rated voltage in the parameter of electric machine set and rated power, motor torque Te1 is calculated；
(2) the power winding three-phase electric current that signal acquisition module obtains is transformed to biphase rotation by three-phase static coordinate system
Coordinate system, described biphase rotating coordinate system includes pM axle and pT axle, obtains power winding current component on pM axle and pT axle
ipM、ipT, ipMAnd ipTInitial value is acquiescence set-point；
(3) the control winding three-phase electric current that signal acquisition module obtains is transformed to biphase rotation by three-phase static coordinate system
Coordinate system, described biphase rotating coordinate system includes cM axle and cT axle, obtains controlling winding current component on cM axle and cT axle
icM、icT, icMAnd icTInitial value is acquiescence set-point；
(4) according to the running current upper limit of motor torque Te1 and setting, given value of current value i controlling winding is calculated* cM、
i* cT；
(5) according to ipM、ipT、i* cM、i* cT, the three-phase voltage U controlling winding is calculated by adaptive algorithmcU、UcV、
UcW, and by driving unsteady flow module to make the three-phase voltage of control winding be UcU、UcV、UcW；
(6) calculate process by the rotational speed regulation in adaptive algorithm, adjust motor speed and be promoted to nature synchronization by 0
Speed；
(7) after motor speed arrives nature synchronous speed, according to the frequency set and torque parameter, said process, control are repeated
Motor processed arrives desired speed.
Further, described control module monitors the service data of brushless double-fed motor in real time, and changes institute in time
State the electric current that brushless double-fed motor is provided by unsteady flow module.
What the employing technique scheme present invention obtained has the beneficial effect that control apparatus structure is simple, low cost, controlling party
Method realizes easily, safe and reliable to operation, it is possible to monitor the running status of brushless double-fed motor in real time, it is to avoid dash current pair
The harm of brushless double-fed motor, it is possible to smooth, the high dynamic response of the full frequency band realizing brushless double-fed motor control.And
It is less that this control method controls noise when brushless double-fed motor runs, and improves the life-span of brushless double-fed motor.Lifting frequency
During need not the long period, it is possible to meet the occasion higher to response time requirement.And this control method and control dress
Put strong adaptability, it is possible to use the brushless double-fed motor in various models.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation that phase-wound rotor brushless double-fed motor of the present invention controls device；
Fig. 2 is the FB(flow block) of phase-wound rotor brushless double-fed motor control method of the present invention；
Fig. 3 is the control flow of vector adaptive algorithm in phase-wound rotor brushless double-fed motor control method of the present invention
Figure；
Fig. 4 is that the phase-wound rotor brushless double-fed motor of a kind of traditional 25kW power controls startup electricity after winding short circuit
Power winding current waveform during machine；
Fig. 5 is that the phase-wound rotor brushless double-fed motor of same with Fig. 4 motor controls startup motor after winding short circuit
Time control winding current waveform；
Fig. 6 is the phase-wound rotor of the phase-wound rotor brushless double-fed motor use present invention of same with Fig. 4 motor
Brushless double-fed motor controls device and control method carries out the power winding current waveform in start-up course；
Fig. 7 is the phase-wound rotor of the phase-wound rotor brushless double-fed motor use present invention of same with Fig. 4 motor
Brushless double-fed motor controls device and control method carries out the control winding current waveform in start-up course.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further.At this it should be noted that for
The explanation of these embodiments is adapted to assist in and understands the present invention, but is not intended that limitation of the invention.Additionally, it is disclosed below
As long as each embodiment of the present invention in involved technical characteristic do not constitute conflict each other and just can be mutually combined.
Fig. 1 is the structural representation that in an embodiment, phase-wound rotor brushless double-fed motor controls device, including contact
Device K1, for the break-make of the power supply of power winding, power winding side power supply I can be 380V, 690V, 1140V, 6kV, 10kV tri-
One in phase power frequency AC；Also include catalyst K2, for controlling the break-make of the power supply of device, control the power supply of device
II can be continuing of a kind of or 580V, the 1150V in 380V, 690V, 1140V, 6kV, 10kV three-phase main-frequency alternating current power supply
Galvanic one；Also include catalyst K3, for controlling the break-make in short circuit loop, winding side, ensure when controlling plant failure
Motor continues to run with；Also include signal acquisition module, for gathering the voltage and current letter of brushless double-fed motor power winding
Number, control winding voltage and current signal；Also include unsteady flow module, the control needed for brushless double-fed motor is exported
Electric current；Also include control module, for receiving the signal of described signal acquisition module, according to the signal of described signal acquisition module
Carry out calculating and controlling the output of described unsteady flow blocks current；Also include man machine interface and communication module, described man machine interface and
Described communication module is connected with described control module, and described man machine interface and described communication module refer to for the operation receiving outside
Order and the ruuning situation of feedback system；Described signal acquisition module includes current collection circuit and voltage collection circuit；Electric current is adopted
Collector and voltage collection circuit include filter circuit and change-over circuit.
Fig. 2 is the flow chart of phase-wound rotor brushless double-fed motor control method in an embodiment, comprises the following steps:
(1) connect the power supply of control device, control device ready；
(2) after controlling device ready, setup parameter in man machine interface；
(3) perform to start operation；
(4) power winding power supply is connected；
(5) control module in device is controlled according to the motor signal detected, execution vector adaptive control algorithm；
(6) control module drives unsteady flow module to realize the output controlling winding；
(7), after control device control motor reaches nature synchronous speed, non-impacting start process is completed；
(8), after having started, control device, according to the frequency set and torque parameter, continues executing with vector Self Adaptive Control
Algorithm, controls motor lifting speed and runs；
(9) when control device breaks down, control device and deactivate, be also turned on controlling the short circuit loop of winding side.
Control module in this control method monitors the service data in brushless double-fed motor running in real time, and
Change the electric current that brushless double-fed motor is provided by unsteady flow module in time.
Fig. 3 is the control of vector adaptive algorithm in phase-wound rotor brushless double-fed motor control method in an embodiment
Flow chart.Vector adaptive algorithm flow process in the present invention comprises the following steps:
(1) according to the rated voltage in the parameter of electric machine set and rated power, motor torque Te1 is calculated；
(2) the power winding three-phase electric current that signal acquisition module obtains is transformed to biphase rotation by three-phase static coordinate system
Coordinate system, described biphase rotating coordinate system includes pM axle and pT axle, obtains power winding current component on pM axle and pT axle
ipM、ipT, ipMAnd ipTInitial value is acquiescence set-point；
(3) the control winding three-phase electric current that signal acquisition module obtains is transformed to biphase rotation by three-phase static coordinate system
Coordinate system, described biphase rotating coordinate system includes cM axle and cT axle, obtains controlling winding current component on cM axle and cT axle
icM、icT, icMAnd icTInitial value is acquiescence set-point；
(4) according to the running current upper limit of motor torque Te1 and setting, given value of current value i controlling winding is calculated* cM、
i* cT；
(5) according to ipM、ipT、i* cM、i* cT, the three-phase voltage U controlling winding is calculated by adaptive algorithmcU、UcV、
UcW, and by driving unsteady flow module to make the three-phase voltage of control winding be UcU、UcV、UcW；
(6) calculate process by the rotational speed regulation in adaptive algorithm, adjust motor speed and be promoted to nature synchronization by 0
Speed；
(7) after motor speed arrives nature synchronous speed, according to the frequency set and torque parameter, said process, control are repeated
Motor processed arrives desired speed.
Fig. 4 is that the phase-wound rotor brushless double-fed motor of a kind of traditional 25kW power controls startup electricity after winding short circuit
Power winding current waveform during machine, Fig. 5 is that the brushless double-fed motor of same with Fig. 4 motor controls startup electricity after winding short circuit
During machine control winding current waveform, in brushless double-fed motor start-up course, the current peak of power winding at about 110A,
Being 4-5 times of no-load current, the current peak of control winding is at about 90A, considerably beyond the motor specified electricity time properly functioning
Stream.The biggest electric current produces great impact to power supply, also can produce on motor internal and supply line loss and big
Amount heating.
Fig. 6 is the phase-wound rotor brushless double-fed motor of same with Fig. 4 motor, turns at the Wound-rotor type using the present invention
Sub-brushless double-fed motor control method and control device carry out the power winding current waveform in start-up course, and Fig. 7 is and Fig. 4
The phase-wound rotor brushless double-fed motor of same motor, in the phase-wound rotor brushless double-fed motor control using the present invention
Device processed and control method carry out the control winding current waveform in start-up course, with traditional short circuit controls the startup side of winding
Formula is different, and it is about 25A and 15A respectively that the peak value of power winding current and control winding current is controlled in, significantly
Less than the most traditional startup method.
The control apparatus structure of the present invention is simple, low cost, and control method realizes easily, safe and reliable to operation, it is possible to real
Time monitoring brushless double-fed motor running status, it is to avoid the dash current harm to brushless double-fed motor, it is possible to realize
Smooth, the high dynamic response of the full frequency band of brushless double-fed motor control.And this control method controls brushless double-fed motor
During operation, noise is less, improves the life-span of brushless double-fed motor.The long period is need not, it is possible to meet during lifting frequency
The occasion higher to response time requirement.And this control method and control device strong adaptability, it is possible to use in various models
Brushless double-fed motor.
Above in association with accompanying drawing, embodiments of the present invention are explained in detail, but the invention is not restricted to described enforcement
Mode.For a person skilled in the art, in the case of without departing from the principle of the invention and spirit, to these embodiments
Carry out multiple change, revise, replace and modification, still fall within protection scope of the present invention.
Claims (9)
1. phase-wound rotor brushless double-fed motor controls device, it is characterised in that: include
Catalyst K1, for the break-make of the power supply of power winding；
Catalyst K2, for controlling the break-make of the power supply of device；
Catalyst K3, for controlling the break-make in short circuit loop, winding side；
Signal acquisition module, for gathering the voltage and current signal of brushless double-fed motor power winding, controlling the electricity of winding
Pressure and current signal；
Unsteady flow module, the control electric current needed for brushless double-fed motor is exported；
Control module, for receiving the signal of described signal acquisition module, counts according to the signal of described signal acquisition module
Calculate and control the output of described unsteady flow blocks current.
The most according to claim 1, phase-wound rotor brushless double-fed motor controls device, it is characterised in that: also include man-machine
Interface and communication module, described man machine interface and described communication module are connected with described control module, described man machine interface and institute
State communication module for receiving operational order and the ruuning situation of feedback system of outside.
The most according to claim 1, phase-wound rotor brushless double-fed motor controls device, it is characterised in that: described catalyst
The control loop of K1, described catalyst K2 and described catalyst K3 is connected with described control module, and described control module is used for controlling
Make described catalyst K1, described catalyst K2 and the break-make of described catalyst K3.
The most according to claim 1, phase-wound rotor brushless double-fed motor controls device, it is characterised in that: described signal is adopted
Collection module includes current collection circuit and voltage collection circuit.
The most according to claim 1, phase-wound rotor brushless double-fed motor controls device, it is characterised in that: described electric current is adopted
Collector includes filter circuit and change-over circuit.
The most according to claim 1, phase-wound rotor brushless double-fed motor controls device, it is characterised in that: described voltage is adopted
Collector includes filter circuit and change-over circuit.
7. use any of the above-described claim to control the control method of device, it is characterised in that to comprise the following steps:
(1) connect the power supply of control device, control device ready；
(2) after controlling device ready, setup parameter in man machine interface；
(3) perform to start operation；
(4) power winding power supply is connected；
(5) control module in device is controlled according to the motor signal detected, execution vector adaptive control algorithm；
(6) control module drives unsteady flow module to realize the output controlling winding；
(7), after control device control motor reaches nature synchronous speed, non-impacting start process is completed；
(8), after having started, control device, according to the frequency set and torque parameter, continues executing with vector Self Adaptive Control and calculates
Method, controls motor lifting speed and runs；
(9) when control device breaks down, control device and deactivate, be also turned on controlling the short circuit loop of winding side.
Control method the most according to claim 7, it is characterised in that described vector adaptive control algorithm includes following step
Rapid:
(1) according to the rated voltage in the parameter of electric machine set and rated power, motor torque Te1 is calculated；
(2) the power winding three-phase electric current that signal acquisition module obtains is transformed to two cordic phase rotators by three-phase static coordinate system
System, described biphase rotating coordinate system includes pM axle and pT axle, obtains power winding current component i on pM axle and pT axlepM、
ipT, ipMAnd ipTInitial value is acquiescence set-point；
(3) the control winding three-phase electric current that signal acquisition module obtains is transformed to two cordic phase rotators by three-phase static coordinate system
System, described biphase rotating coordinate system includes cM axle and cT axle, obtains controlling winding current component i on cM axle and cT axlecM、
icT, icMAnd icTInitial value is acquiescence set-point；
(4) according to the running current upper limit of motor torque Te1 and setting, given value of current value i controlling winding is calculated* cM、i* cT；
(5) according to ipM、ipT、i* cM、i* cT, the three-phase voltage U controlling winding is calculated by adaptive algorithmcU、UcV、UcW, and lead to
Unsteady flow of overdriving module makes the three-phase voltage of control winding be UcU、UcV、UcW；
(6) calculate process by the rotational speed regulation in adaptive algorithm, adjust motor speed and be promoted to nature synchronous speed by 0；
(7) after motor speed arrives nature synchronous speed, according to the frequency set and torque parameter, repeat said process, control electricity
Machine arrives desired speed.
Brushless double-fed motor control method the most according to claim 7, it is characterised in that: described control module monitors in real time
The service data of brushless double-fed motor, and change the electric current that brushless double-fed motor is provided by described unsteady flow module in time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610654012.5A CN106230329A (en) | 2016-08-10 | 2016-08-10 | Phase-wound rotor brushless double-fed motor controls device and control method |
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| CN201610654012.5A CN106230329A (en) | 2016-08-10 | 2016-08-10 | Phase-wound rotor brushless double-fed motor controls device and control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267174A (en) * | 2008-01-17 | 2008-09-17 | 中国矿业大学 | Start method and device for brushless dual-feedback electromotor |
| CN101345464A (en) * | 2008-08-27 | 2009-01-14 | 北京清能华福风电技术有限公司 | Double-feed motor adopting AC-DC-AC current transformer for speed regulation and its start control method |
| CN201956948U (en) * | 2011-02-18 | 2011-08-31 | 珠海运控电机有限公司 | AC permanent magnet servo system with emergency brake protection function |
| CN103259485A (en) * | 2013-06-14 | 2013-08-21 | 重庆交通大学 | Method of improving identification precision of speedless sensor under condition of unbalanced network voltage |
| CN203387457U (en) * | 2013-07-17 | 2014-01-08 | 深圳市康灿科技有限公司 | Special-purpose integrated frequency conversion driving device for unit brushless double-fed motor |
-
2016
- 2016-08-10 CN CN201610654012.5A patent/CN106230329A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267174A (en) * | 2008-01-17 | 2008-09-17 | 中国矿业大学 | Start method and device for brushless dual-feedback electromotor |
| CN101345464A (en) * | 2008-08-27 | 2009-01-14 | 北京清能华福风电技术有限公司 | Double-feed motor adopting AC-DC-AC current transformer for speed regulation and its start control method |
| CN201956948U (en) * | 2011-02-18 | 2011-08-31 | 珠海运控电机有限公司 | AC permanent magnet servo system with emergency brake protection function |
| CN103259485A (en) * | 2013-06-14 | 2013-08-21 | 重庆交通大学 | Method of improving identification precision of speedless sensor under condition of unbalanced network voltage |
| CN203387457U (en) * | 2013-07-17 | 2014-01-08 | 深圳市康灿科技有限公司 | Special-purpose integrated frequency conversion driving device for unit brushless double-fed motor |
Non-Patent Citations (1)
| Title |
|---|
| 朱云国 等: "无刷双馈风力发电机的无速度传感器矢量控制技术", 《电力自动化设备》 * |
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Application publication date: 20161214 |