CN203180817U - A control device based on a brushless double-fed motor - Google Patents
A control device based on a brushless double-fed motor Download PDFInfo
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- CN203180817U CN203180817U CN2013201391925U CN201320139192U CN203180817U CN 203180817 U CN203180817 U CN 203180817U CN 2013201391925 U CN2013201391925 U CN 2013201391925U CN 201320139192 U CN201320139192 U CN 201320139192U CN 203180817 U CN203180817 U CN 203180817U
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Abstract
The utility model relates to a control device based on a brushless double-fed motor. The brushless double-fed motor is used for an independent power generation system containing a controlling winding side inverter. The control device comprises a voltage outer loop controller, a current inner loop controller connected with the output end of the voltage outer loop controller, a phase-locked loop controller, a three-phase-to-two-phase converter connected with the input end of the current inner loop controller, and a two-phase-to-three-phase converter connected with the output end of the current inner loop controller. By using the voltage outer loop controller, the control device may control the voltage of an independent power grid accurately and rapidly through the controlling winding side inverter. In addition, by using the current inner loop controller, the control device increases the quick responsiveness of the whole power generation system. Furthermore, by using the phase-locked loop controller, the control device may well stabilize the output frequency of the independent power grid through the controlling winding side inverter.
Description
Technical field
The utility model relates to Motor Control Field, relates in particular to a kind of control device based on brushless dual-feed motor for stand alone generating system.
Background technology
As everyone knows, have the brush double feedback electric engine to have advantages such as Electric Machine Control is simple, manufacturing technology maturation, therefore, the extensive use AC excitation has the brush double feedback electric engine in the variable speed constant frequency generator system.Yet, use for stand alone generating system, because to the control of generating voltage and particularly important to the control of generating frequency, therefore, the above-mentioned brush double feedback electric engine that has can't not be applicable to this stand alone generating system because control precision is high; In addition, owing to there is the brush double feedback electric engine to have brush, damage easily, therefore, if use in remote place or wind generator system, then extremely be difficult to safeguard.
In order to overcome the problems referred to above, begin to adopt the brushless dual-feed motor suitable with brush double feedback electric engine performance is arranged in the now increasing occasion, this brushless dual-feed motor has saved brush and slip ring structure, therefore has advantages such as easy to maintenance, that control precision is high, performance is more reliable.In addition, because the stator winding of brushless dual-feed motor can double-fed, therefore when as ac adjustable speed motor, only must control winding slip power can be provided, thereby reduce the capacity of frequency converter in the buncher greatly, reduce system cost; And, can therefore be particularly suitable for wind-force, hydroelectric power generation etc. so that synchronous speed is very low by selecting suitable rotor number of poles.
In view of the foregoing, in stand alone generating system, also begin to adopt this brushless dual-feed motor, therefore, press for a kind of control device for the brushless dual-feed motor that is applied in stand alone generating system of research and development now.
The utility model content
In order to solve the problem that above-mentioned prior art exists, the utility model aims to provide a kind of high-performance, high control precision, intelligentized control device based on brushless dual-feed motor, control output voltage and the frequency of winding side inverter in the stand alone generating system with accurate control employing brushless dual-feed motor, and then control voltage and the frequency of independent electrical network.
A kind of control device based on brushless dual-feed motor described in the utility model, described brushless dual-feed motor is used for comprising the stand alone generating system of control winding side inverter, and this brushless dual-feed motor comprises control winding and power winding, described control device is connected with described control winding side inverter, and described control device comprises:
The outer voltage controller, its reception also compares the target grid voltage of a peripheral input and an electrical network reference voltage and regulates and export an instruction current of gaining merit, wherein, described electrical network reference voltage is the mean value of the three phase network feedback voltage effective value that samples by a voltage sensor;
The current inner loop controller that is connected with the output of described outer voltage controller, it relatively regulates and exports a meritorious command voltage with described meritorious axle instruction current and a meritorious feedback current on the one hand, receives on the other hand and one idle command voltage is relatively regulated and exported to idle instruction current and one idle feedback current of a peripheral input;
Pll controller, it receives on the one hand and the add up arbor that is converted to described brushless dual-feed motor of the target grid frequency of a peripheral input and an electrical network feedback frequency that samples by a frequency sensor is instructed rotating speed, and the arbor feedback rotating speed of this arbor instruction rotating speed and the described brushless dual-feed motor that samples by a speed probe compared regulate and export electrical network instruction frequency to described control winding side inverter, be the output order angle of described control winding side inverter with described electrical network instruction frequency inverted on the other hand;
Three-phase-two phasing commutator that is connected with the input of described current inner loop controller, it will be transformed to described meritorious axle feedback current and idle axle feedback current by the feedback current of the described control winding of the three-phase that a current sensor samples according to the output order angle of the described control winding side inverter of described pll controller output; And
Two-phase-the three-phase inverter that is connected with the output of described current inner loop controller, it is according to the output order angle of the described control winding side inverter of described pll controller output, will described meritorious axle command voltage and the conversion and export the three phase network command voltage to described control winding side inverter together of idle axle command voltage.
In the above-mentioned control device based on brushless dual-feed motor, described outer voltage controller comprises successively and to connect:
The first adder of more described target grid voltage and electrical network reference voltage; And
Comparative result to described first adder output carries out first pi regulator that PI regulated and exported described meritorious axle instruction current.
In the above-mentioned control device based on brushless dual-feed motor,
Described current inner loop controller comprises connection successively:
Link to each other with the output of described first pi regulator and the second adder of more described meritorious axle instruction current and meritorious axle feedback current; And
Comparative result to described second adder output carries out second pi regulator that PI regulated and exported described meritorious axle command voltage;
Described current inner loop controller also comprises connection successively:
The 3rd adder of more described idle axle instruction current and idle axle feedback current; And
Comparative result to described the 3rd adder output carries out the 3rd pi regulator that PI regulated and exported described idle axle command voltage.
In the above-mentioned control device based on brushless dual-feed motor,
Described pll controller comprises:
Be first multiplier of target grid angular speed with described target grid frequency inverted;
Described electrical network feedback frequency is converted to the 4th multiplier of electrical network feedback angular speed;
Described pll controller also comprises connection successively:
Link to each other with the output of described first multiplier and the 4th multiplier and the 4th adder of add up described target grid angular speed and electrical network feedback angular speed;
The accumulation result of described the 4th adder output is converted to second multiplier of the arbor instruction rotating speed of described brushless dual-feed motor;
The slender acanthopanax musical instruments used in a Buddhist or Taoist mass of the arbor feedback rotating speed of the arbor instruction rotating speed of more described brushless dual-feed motor and described brushless dual-feed motor;
The comparative result of described slender acanthopanax musical instruments used in a Buddhist or Taoist mass output is carried out that PI regulates and exports the 4th pi regulator of described electrical network instruction frequency to described control winding side inverter;
Be the 3rd multiplier of the instruction angular speed of described control winding side inverter with described electrical network instruction frequency inverted; And
The instruction angular speed of described control winding side inverter is converted to the output order angle of described control winding side inverter and exports the integrator of the output order angle of described control winding side inverter to described three-phase-two phasing commutator and two-phase-three-phase inverter.
Owing to adopted above-mentioned technical solution, the utility model is by adopting high accuracy, the outer voltage controller of response fast, thereby can carry out accurately control fast to the voltage of independent electrical network by control winding side inverter; The utility model has also adopted high accuracy, the quick current inner loop controller that responds simultaneously, thereby can improve the fast-response of whole generating system.In addition, the utility model has been also by having adopted high-precision pll controller, thereby can stablize the output frequency of independent electrical network by control winding side inverter better.
Description of drawings
Fig. 1 is the structural representation based on outer voltage controller, current inner loop controller and two-phase-three-phase inverter in the control device of brushless dual-feed motor of the present utility model;
Fig. 2 is the structural representation based on pll controller in the control device of brushless dual-feed motor of the present utility model;
Fig. 3 is the structural representation based on three-phase-two phasing commutator in the control device of brushless dual-feed motor of the present utility model;
Fig. 4 is the structural representation that adopts the stand alone generating system of the control device based on brushless dual-feed motor of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, provide preferred embodiment of the present utility model, and be described in detail.
See also Fig. 1-Fig. 4, the utility model, namely, a kind of control device 10 based on brushless dual-feed motor, brushless dual-feed motor 20(BDFM) is used for comprising the stand alone generating system of controlling winding side inverter 30, and this brushless dual-feed motor 20 comprises control winding and power winding (not shown), and control device 10 is connected with control winding side inverter 30.
Internal structure to control device 10 is elaborated below, and this control device 10 comprises outer voltage controller, current inner loop controller, pll controller, three-phase-two phasing commutator 4 and two-phase-three-phase inverter 5.
The reception of outer voltage controller and target grid voltage and an electrical network reference voltage V that a periphery is imported
RefpCompare and regulate and export a meritorious instruction current i
* Dc, wherein, target grid voltage is the required magnitude of voltage of load in the stand alone generating system 40, and it can be 380V or 400V, and in the embodiment shown in Figure 2, target grid voltage is 380V; Electrical network reference voltage V
RefpBe three-phase (A phase, B phase and C are mutually) the electrical network feedback voltage effective value V that samples by a voltage sensor (not shown)
Ap, V
Bp, V
CpMean value, that is, and V
Refp=(V
Ap+ V
Bp+ V
Cp)/3;
Specifically, the outer voltage controller comprises first adder 11 and first pi regulator 12 that connects successively, wherein:
First adder 11 comparison object line voltages and electrical network reference voltage V
Refp
The comparative result of 12 pairs of first adders of first pi regulator, 11 outputs carries out PI to be regulated, and the meritorious axle of output instruction current i
* Dc
A current inner loop controller instruction current i that will gain merit on the one hand
* DcWith a meritorious feedback current i
DcRelatively regulate and export a meritorious command voltage V
* Dc, receive on the other hand and with the idle axle instruction current i of a peripheral input
* QcWith one idle feedback current i
QcRelatively regulate and export one idle command voltage V
* Qc, wherein, in the present embodiment, idle axle instruction current i
* QcBe taken as 0;
Specifically, the current inner loop controller comprises second adder 21 and second pi regulator 22 that connects successively, and the 3rd adder 23 and the 3rd pi regulator 24 that connect successively, wherein:
Second adder 21 is connected with the output of first pi regulator 12, and relatively more meritorious axle instruction current i
* DcWith meritorious axle feedback current i
Dc
The comparative result of 22 pairs of second adders of second pi regulator, 21 outputs carries out PI to be regulated, and the meritorious axle of output command voltage V
* Dc
The 3rd adder 23 more idle axle instruction current i
* QcWith idle axle feedback current i
Qc
The comparative result of 24 pairs of the 3rd adders of the 3rd pi regulator, 23 outputs carries out PI to be regulated, and exports idle axle command voltage V
* Qc
The electrical network feedback frequency f that pll controller receives on the one hand and the target grid frequency of a peripheral input and is sampled by a frequency sensor (not shown)
cThe arbor instruction rotating speed w that adds up and be converted to brushless dual-feed motor 20
* r, and with this arbor instruction rotating speed w
* rArbor feedback rotating speed w with the brushless dual-feed motor 20 that samples by a speed probe (not shown)
rCompare and regulate and export electrical network instruction frequency f
* c, on the other hand electrical network is instructed frequency f
* cBe converted to the output order angle θ of control winding side inverter 30
* c, wherein, in the embodiment shown in Figure 2, the target grid frequency is 50Hz;
Specifically, pll controller comprises first multiplier 31, the 4th adder 32, second multiplier 33, slender acanthopanax musical instruments used in a Buddhist or Taoist mass 34, the 4th pi regulator 35, the 3rd multiplier 36 and the integrator 37 that connects successively, and the 4th adder 32 also is connected with one the 4th multiplier 38, wherein:
The 4th multiplier 38 is with electrical network feedback frequency f
cBe converted to electrical network feedback angular speed w
c, and the coefficient of the 4th multiplier 38 is 2 π, that is, and and w
c=2 π * f
c
The 4th adder 32 target grid angular speed w that adds up
* pWith electrical network feedback angular speed w
c
Slender acanthopanax musical instruments used in a Buddhist or Taoist mass 34 is the arbor instruction rotating speed w of brushless dual-feed motor 20 relatively
* rArbor feedback rotating speed w with brushless dual-feed motor 20
r
The comparative result of 35 pairs of slender acanthopanax musical instruments used in a Buddhist or Taoist mass of the 4th pi regulator, 34 outputs carries out PI to be regulated, and to control winding side inverter 30 output electrical network instruction frequency f
* c
The 3rd multiplier 36 instructs frequency f with electrical network
* cBe converted to the instruction angular speed w of control winding side inverter 30
* c
Three-phase-two phasing commutator 4 is according to the output order angle θ of the control winding side inverter 30 of integrator 37 outputs of pll controller
* c, will control the feedback current i of winding by the three-phase (A phase, B phase and C are mutually) that a current sensor (not shown) samples
Ac, i
Bc, i
CcBe transformed to meritorious axle feedback current i
DcWith idle axle feedback current i
Qc, and export second adder 21 and the 3rd adder 23 respectively to.
Two-phase-three-phase inverter 5 is according to the output order angle θ of the control winding side inverter 30 of integrator 37 outputs of pll controller
* c, with the meritorious axle command voltage V of second pi regulator 22 and 24 outputs of the 3rd pi regulator
* DcWith idle axle command voltage V
* QcConversion and export three phase network command voltage V together
* Ac, V
* Bc, V
* Cc, and export control winding side inverter 30 to.
As shown in Figure 4, adopt above-mentioned brushless dual-feed motor 20 and also comprise based on the stand alone generating system of the control device 10 of this brushless dual-feed motor 20: net side inverter 50 and be connected bus capacitor 60 between control winding side inverter 30 and the net side inverter 50; Wherein:
The stator (not shown) of brushless dual-feed motor 20 is connected positive energy exchange with first circuit breaker 80 with load 40 by contactor 70 successively, the control winding of brushless dual-feed motor 20 is connected positive energy exchange with second circuit breaker 90 with load 40 by control winding side inverter 30 successively, thereby energy can flowed to two passages of load 40 from stator and control winding;
Control device 10 be mainly used in sampling line voltage, frequency etc. and target voltage, frequency etc., and according to corresponding command voltage and the frequency of data output of gathering, thereby output voltage and the frequency of control control winding side inverter 30, and then obtain stable line voltage and frequency;
Control winding side inverter 30 is mainly used in by regulating following three amounts, and making voltage and the frequency stabilization of stator output is target voltage and frequency (in the present embodiment, being 380V, 50Hz), namely obtains stable line voltage and frequency:
1, the amplitude size of regulating exciting current according to the situation of load 40 (become heavy or lighten as load 40);
2, under the control of control device 10, for the frequency that guarantees output voltage is certain, adjust the frequency of exciting current according to different motor speeds;
3, under the control of control device 10, according to the phase place of mains frequency phase change exciting current (be incorporated into the power networks if desired, then need to carry out the locking of the phase place of electrical network).
For bus capacitor 60, mainly due to stand alone generating system be one small-sized from the net electricity generation system, more stable in order to make electrical network, have certain anti-shock load ability, therefore need bus capacitor 60 to carry out the function of energy storage and level and smooth electrical network; Usually the control busbar voltage is steady state value.
Above-mentioned stand alone generating system also comprises protection system 100, and it is used for voltage, electric current that system sends are gathered, and carries out protections such as overvoltage, overcurrent.
Above-described, be preferred embodiment of the present utility model only, be not in order to limiting scope of the present utility model, above-described embodiment of the present utility model can also make a variety of changes.Be that simple, the equivalence that every claims according to the utility model application and description are done changes and modification, all fall into the claim protection range of the utility model patent.The utility model not detailed description be the routine techniques content.
Claims (4)
1. control device based on brushless dual-feed motor, described brushless dual-feed motor is used for comprising the stand alone generating system of control winding side inverter, and this brushless dual-feed motor comprises control winding and power winding, described control device is connected with described control winding side inverter, it is characterized in that described control device comprises:
The outer voltage controller, its reception also compares the target grid voltage of a peripheral input and an electrical network reference voltage and regulates and export an instruction current of gaining merit, wherein, described electrical network reference voltage is the mean value of the three phase network feedback voltage effective value that samples by a voltage sensor;
The current inner loop controller that is connected with the output of described outer voltage controller, it relatively regulates and exports a meritorious command voltage with described meritorious axle instruction current and a meritorious feedback current on the one hand, receives on the other hand and one idle command voltage is relatively regulated and exported to idle instruction current and one idle feedback current of a peripheral input;
Pll controller, it receives on the one hand and the add up arbor that is converted to described brushless dual-feed motor of the target grid frequency of a peripheral input and an electrical network feedback frequency that samples by a frequency sensor is instructed rotating speed, and the arbor feedback rotating speed of this arbor instruction rotating speed and the described brushless dual-feed motor that samples by a speed probe compared regulate and export electrical network instruction frequency to described control winding side inverter, be the output order angle of described control winding side inverter with described electrical network instruction frequency inverted on the other hand;
Three-phase-two phasing commutator that is connected with the input of described current inner loop controller, it will be transformed to described meritorious axle feedback current and idle axle feedback current by the feedback current of the described control winding of the three-phase that a current sensor samples according to the output order angle of the described control winding side inverter of described pll controller output; And
Two-phase-the three-phase inverter that is connected with the output of described current inner loop controller, it is according to the output order angle of the described control winding side inverter of described pll controller output, will described meritorious axle command voltage and the conversion and export the three phase network command voltage to described control winding side inverter together of idle axle command voltage.
2. the control device based on brushless dual-feed motor according to claim 1 is characterized in that, described outer voltage controller comprises successively and to connect:
The first adder of more described target grid voltage and electrical network reference voltage; And
Comparative result to described first adder output carries out first pi regulator that PI regulated and exported described meritorious axle instruction current.
3. the control device based on brushless dual-feed motor according to claim 2 is characterized in that,
Described current inner loop controller comprises connection successively:
Link to each other with the output of described first pi regulator and the second adder of more described meritorious axle instruction current and meritorious axle feedback current; And
Comparative result to described second adder output carries out second pi regulator that PI regulated and exported described meritorious axle command voltage;
Described current inner loop controller also comprises connection successively:
The 3rd adder of more described idle axle instruction current and idle axle feedback current; And
Comparative result to described the 3rd adder output carries out the 3rd pi regulator that PI regulated and exported described idle axle command voltage.
4. the control device based on brushless dual-feed motor according to claim 1 is characterized in that,
Described pll controller comprises:
Be first multiplier of target grid angular speed with described target grid frequency inverted;
Described electrical network feedback frequency is converted to the 4th multiplier of electrical network feedback angular speed;
Described pll controller also comprises connection successively:
Link to each other with the output of described first multiplier and the 4th multiplier and the 4th adder of add up described target grid angular speed and electrical network feedback angular speed;
The accumulation result of described the 4th adder output is converted to second multiplier of the arbor instruction rotating speed of described brushless dual-feed motor;
The slender acanthopanax musical instruments used in a Buddhist or Taoist mass of the arbor feedback rotating speed of the arbor instruction rotating speed of more described brushless dual-feed motor and described brushless dual-feed motor;
The comparative result of described slender acanthopanax musical instruments used in a Buddhist or Taoist mass output is carried out that PI regulates and exports the 4th pi regulator of described electrical network instruction frequency to described control winding side inverter;
Be the 3rd multiplier of the instruction angular speed of described control winding side inverter with described electrical network instruction frequency inverted; And
The instruction angular speed of described control winding side inverter is converted to the output order angle of described control winding side inverter and exports the integrator of the output order angle of described control winding side inverter to described three-phase-two phasing commutator and two-phase-three-phase inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201391925U CN203180817U (en) | 2013-03-25 | 2013-03-25 | A control device based on a brushless double-fed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201391925U CN203180817U (en) | 2013-03-25 | 2013-03-25 | A control device based on a brushless double-fed motor |
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| Publication Number | Publication Date |
|---|---|
| CN203180817U true CN203180817U (en) | 2013-09-04 |
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|---|---|---|---|
| CN2013201391925U Expired - Fee Related CN203180817U (en) | 2013-03-25 | 2013-03-25 | A control device based on a brushless double-fed motor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052356A (en) * | 2014-06-25 | 2014-09-17 | 合康变频科技（武汉）有限公司 | Variable-speed constant frequency electricity generation control device and electricity generation method based on brushless doubly-fed motor |
| CN105529976A (en) * | 2014-09-29 | 2016-04-27 | 华中科技大学 | Output frequency control method for brushless doubly-fed generator without position sensor |
| CN106411205A (en) * | 2016-09-05 | 2017-02-15 | 华中科技大学 | Rotating speed identification method and system of brushless doubly-fed motor |
| CN107425771A (en) * | 2017-08-28 | 2017-12-01 | 浙江华飞智能科技有限公司 | The control method and electron speed regulator of motor in a kind of unmanned plane |
| CN113783289A (en) * | 2021-09-30 | 2021-12-10 | 广州奥鹏能源科技有限公司 | Bidirectional inverter and control method |
| CN115347618A (en) * | 2022-10-19 | 2022-11-15 | 湖南大学 | Grid-connected power conversion device for micro-grid and application method thereof |
-
2013
- 2013-03-25 CN CN2013201391925U patent/CN203180817U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052356A (en) * | 2014-06-25 | 2014-09-17 | 合康变频科技（武汉）有限公司 | Variable-speed constant frequency electricity generation control device and electricity generation method based on brushless doubly-fed motor |
| CN104052356B (en) * | 2014-06-25 | 2017-06-13 | 合康变频科技（武汉）有限公司 | Variable speed constant frequency generator control device and electricity-generating method based on brushless dual-feed motor |
| CN105529976A (en) * | 2014-09-29 | 2016-04-27 | 华中科技大学 | Output frequency control method for brushless doubly-fed generator without position sensor |
| CN105529976B (en) * | 2014-09-29 | 2018-04-24 | 华中科技大学 | The brushless double feed generator output frequency control method of position-sensor-free |
| CN106411205A (en) * | 2016-09-05 | 2017-02-15 | 华中科技大学 | Rotating speed identification method and system of brushless doubly-fed motor |
| CN106411205B (en) * | 2016-09-05 | 2018-08-21 | 华中科技大学 | A kind of Speed Identification method and system of brushless dual-feed motor |
| CN107425771A (en) * | 2017-08-28 | 2017-12-01 | 浙江华飞智能科技有限公司 | The control method and electron speed regulator of motor in a kind of unmanned plane |
| CN113783289A (en) * | 2021-09-30 | 2021-12-10 | 广州奥鹏能源科技有限公司 | Bidirectional inverter and control method |
| CN115347618A (en) * | 2022-10-19 | 2022-11-15 | 湖南大学 | Grid-connected power conversion device for micro-grid and application method thereof |
| CN115347618B (en) * | 2022-10-19 | 2023-01-31 | 湖南大学 | Grid-connected power conversion device for micro-grid and application method thereof |
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