CN101546978B - Control method of complete-period generator of bearing-free switch reluctance motor - Google Patents
Control method of complete-period generator of bearing-free switch reluctance motor Download PDFInfo
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- CN101546978B CN101546978B CN2009100267774A CN200910026777A CN101546978B CN 101546978 B CN101546978 B CN 101546978B CN 2009100267774 A CN2009100267774 A CN 2009100267774A CN 200910026777 A CN200910026777 A CN 200910026777A CN 101546978 B CN101546978 B CN 101546978B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004804 winding Methods 0.000 claims abstract description 109
- 239000000725 suspension Substances 0.000 claims abstract description 34
- 238000006073 displacement reaction Methods 0.000 claims description 25
- 238000007667 floating Methods 0.000 claims description 18
- 238000009434 installation Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000011664 signaling Effects 0.000 claims description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
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Abstract
The invention discloses a control method of a complete-period generator of a bearing-free switch reluctance motor, belonging to a control method of a bearing-free switch reluctance generator. In the method, through the judgment on suspension force directions, a corresponding suspension current computing formula which is adopted under the condition of different suspension force directions is designed as follows: confirming the plus and the minus in a concrete suspension force current formula based on the judgment on the output voltage amplitude; and setting an output voltage hysteresis controlling unit in order to reduce the output voltage ripple and avoid the control complexity caused by frequent change of the current direction of suspension windings. The invention constructs a suspension winding current control method from the angle of minimum suspension power consumption and lays a foundation for the theoretical research and the practical application of the complete-period generator of the bearing-less switch reluctance motor.
Description
Technical field
The present invention relates to a kind of control method of complete-period generator of bearing-free switch reluctance motor, belong to the bearing-free switch magnetic-resistance generator control method.
Background technology
Traditional switched reluctance machines adopts periodically timesharing power generation mode, compares with magneto, and power density is its limitation.In order to remedy the periodically limitation of timesharing power generation mode, a kind of complete-period electrification operational mode based on the double winding bearing-free switch reluctance motor is suggested.With 12/8 bearing-free switch magnetic-resistance complete-period generator is example; Fig. 1 is A phase winding structure chart (other two phase winding does not mark), and motor adopts concentrates winding, and two cover windings are arranged on each stator salient poles; The one, by four main windings that are in series on the salient pole, main winding connects rectifying installation; The 2nd, each extremely goes up the suspending windings of independent control, and suspending windings connects asymmetrical half-bridge.As shown in Figure 2; Make the magnetic field influence of unbalance of a pair of utmost point of rotor both sides produce the axial asymmetric radially magnetic pull of α through the suspending windings electric current that suspending windings α axle is led to direction as shown and vary in size, reach the purpose of regulating the rotor radial position thereby in like manner can produce the axial asymmetric radially magnetic pull of β.The suspending windings electric current can be used as the exciting current of generating, in the motor rotation process, will have induced potential to produce in the main winding.After suspending windings was accomplished excitation, cut-off current, main winding afterflow generating got into the afterflow power generating stage that is similar to the conventional switch reluctance generator.Therefore, the bearing-free switch reluctance motor that works under this power generation mode is called the bearing-free switch magnetic-resistance complete-period generator.
In the bearing-free switch magnetic-resistance complete-period generator, suspending windings is not only born the task of producing controllable radial power, and the function of excitation also is provided for complete-period electrification simultaneously.Therefore, the control method of suspending windings electric current is related to the performance that suspends and generate electricity, and is necessary to study a kind of effective control suspending windings method of current, to realize that the bearing-free switch magnetic-resistance complete-period generator suspends and the premium properties of generating.
Summary of the invention
The present invention seeks to provide a kind of control method of complete-period generator of bearing-free switch reluctance motor to the defective that prior art exists.
The present invention adopts following technical scheme for realizing above-mentioned purpose:
The control method of complete-period generator of bearing-free switch reluctance motor of the present invention is characterized in that comprising the steps:
A.) adopt the axial radial displacement transducer of β to detect said bearing-free switch reluctance motor and obtain the actual displacement of β direction of principal axis; Adopt the axial radial displacement transducer of α to detect said bearing-free switch reluctance motor and obtain the actual displacement of α direction of principal axis, said bearing-free switch reluctance motor main winding voltage is obtained main winding virtual voltage U through rectifying installation
0, wherein the β axle is the longitudinal axis in the rectangular coordinate system, the α axle is the transverse axis in the rectangular coordinate system, down together;
B.) given bearing-free switch reluctance motor β direction of principal axis is obtained bearing-free switch reluctance motor β direction of principal axis suspending power F with reference to the difference of displacement and the actual displacement of the described β direction of principal axis of step a through a PID adjuster
β *, given bearing-free switch reluctance motor α direction of principal axis is obtained bearing-free switch reluctance motor α direction of principal axis suspending power F with reference to the difference of displacement and the actual displacement of the described α direction of principal axis of step a through the 2nd PID adjuster
α *, with given bearing-free switch reluctance motor main winding reference voltage U
0 *With the described main winding virtual voltage of step a U
0Difference through pi regulator adjusted current value;
C.) with the described bearing-free switch reluctance motor β of step b direction of principal axis suspending power F
β *, α direction of principal axis suspending power F
α *, reference voltage U
0 *With main winding virtual voltage U
0Poor, regulate current value and main winding current i
m, said bearing-free switch reluctance motor stator upper position sensor detects the position signalling θ that obtains and obtains β axle, the floating winding current of α axle suspension through the suspending windings current controller;
D.) the floating winding current of the described β axle suspension of step c is obtained the Control current that said bearing-free switch reluctance motor β axle suspension is floated winding through the floating winding inverter of β axle suspension, the floating winding current of the described α axle suspension of step c is obtained the Control current of the floating winding of said bearing-free switch reluctance motor α axle suspension through the floating winding inverter of α axle suspension.
The control method of complete-period generator of bearing-free switch reluctance motor of the present invention is through the asymmetric excitation of suspending windings of relative position produces the radial suspension force that unbalanced radially magnetic pull obtains acting on rotor to being positioned at radially.If need the radial load of positive direction, then the air gap flux density amplitude at negative direction place is more little, and it is more little that suspending windings produces the required exciting power of same radial power.This programme has been set up the different suspension electric current computing formula of employing under the different suspending power directions based on this principle.Simultaneously, for reduce output voltage ripple with avoiding the suspending windings sense of current frequent variations complexity in the control that brings, be provided with the output voltage ring controlling unit that stagnates.
Description of drawings
Fig. 1 is a non-bearing switch reluctance motor complete-period electrification structure A phase winding structure chart.
Fig. 2 is non-bearing switch reluctance motor complete-period electrification suspension mechanism figure.
Fig. 3 is control principle figure of the present invention.
Label meaning among the figure: 1-stator, 2-rotor, 3-bearing-free switch reluctance motor main winding, 4-bearing-free switch reluctance motor suspending windings, 5-asymmetrical half-bridge power inverter, 6-rectifying installation, 7-α axial coordinate, 8-β axial coordinate.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to invention:
As shown in Figure 1, be non-bearing switch reluctance motor complete-period electrification structure A phase winding structure chart.
As shown in Figure 2:
1. selecting the α axle for use is that example is explained.Set up radial suspension force expression formula (1) based on existing theory.
2. through the detection rotor radial displacement, after the adjusting of PID controller, export given suspending power F
*Judge that whether given suspending power is greater than 0.If F
*＞0, then calculate i according to formula (2)
S3, calculate i according to formula (3)
S1If F
*＜0, then ask for i according to formula (4)
S1, calculate i according to formula (5)
S3
3. compare actual output voltage U
oWith given output voltage U
o *If U
o＞U
o *, in formula (3) and (5) ± get-number; If U
o＜U
o *, in formula (3) and (5) ± get+number.If in the suspending windings current formula (3) ± get-number the time, U
oStill greater than U
o *, can pass through Δ U=U
o-U
o *Carry out PI and regulate, make i
S3Thereby reducing to reach reduces the suspending windings current i
S1Purpose; When in suspending windings electric current (3) formula ± get+number the time, U
oStill less than U
o *, can regulate Δ U through the PI controller and make i
S3Increase, increase the suspending windings current i thereby reach
S1Purpose.
4. be complexity in the control of avoiding bringing owing to electric current positive and negative frequent variations among Fig. 3 and minimizing output voltage ripple, the stagnant ring of output voltage controlling unit need be set.Wherein, the stagnant ring of voltage lower limit is set to U
1 *, the stagnant ring of the voltage upper limit is set to U
2 *When detecting Uo＜U
1 *, in formula (3), (5) ± number get+number; When detecting U
1 *＜Uo＜U
2 *, in formula (3), (5) ± number orientation identical with a last sense cycle; When detecting Uo＞U
2 *, in formula (3), (5) ± number get-number.Simultaneously, can realize the control among similar Fig. 3 through Δ U is regulated through the PID controller.
5. the control method of β shaft current and above-mentioned similar.
Because the suspending windings sense of current can change, therefore need to adopt the power inverter of adjustable current direction when control.
Formula table
F in the table
α---the radial load of α direction, N
mBe the number of turn, the N of main winding
bBe the suspending windings number of turn, i
m---main winding current, i
S1---α axle positive direction suspending windings electric current, i
S3---α axle negative direction suspending windings electric current, k
f(θ)---the suspending power coefficient, relevant with motor size and rotor position angle.
As shown in Figure 3, the control method of complete-period generator of bearing-free switch reluctance motor is characterized in that comprising the steps:
A.) adopt the axial radial displacement transducer of β to detect said bearing-free switch reluctance motor and obtain the actual displacement of β direction of principal axis; Adopt the axial radial displacement transducer of α to detect said bearing-free switch reluctance motor and obtain the actual displacement of α direction of principal axis, said bearing-free switch reluctance motor main winding voltage is obtained main winding virtual voltage U through rectifying installation
0, wherein the β axle is the longitudinal axis in the rectangular coordinate system, the α axle is the transverse axis in the rectangular coordinate system, down together;
B.) given bearing-free switch reluctance motor β direction of principal axis is obtained bearing-free switch reluctance motor β direction of principal axis suspending power F with reference to the difference of displacement and the actual displacement of the described β direction of principal axis of step a through a PID adjuster
β *, given bearing-free switch reluctance motor α direction of principal axis is obtained bearing-free switch reluctance motor α direction of principal axis suspending power F with reference to the difference of displacement and the actual displacement of the described α direction of principal axis of step a through the 2nd PID adjuster
α *, with given bearing-free switch reluctance motor main winding reference voltage U
0 *With the described main winding virtual voltage of step a U
0Difference through pi regulator adjusted current value;
C.) with the described bearing-free switch reluctance motor β of step b direction of principal axis suspending power F
β *, α direction of principal axis suspending power F
α *, reference voltage U
0 *With main winding virtual voltage U
0Poor, regulate current value and main winding current i
m, said bearing-free switch reluctance motor stator upper position sensor detects the position signalling θ that obtains and obtains β axle, the floating winding current of α axle suspension through the suspending windings current controller;
D.) the floating winding current of the described β axle suspension of step c is obtained the Control current that said bearing-free switch reluctance motor β axle suspension is floated winding through the floating winding inverter of β axle suspension, the floating winding current of the described α axle suspension of step c is obtained the Control current of the floating winding of said bearing-free switch reluctance motor α axle suspension through the floating winding inverter of α axle suspension.
The control method of described complete-period generator of bearing-free switch reluctance motor is characterized in that asking for of the described suspending windings electric current of step c comprises the steps:
When required suspending power is correct time
E.) the suspending windings electric current at adjusting negative direction place
F.) when the actual output voltage of said bearing-free switch reluctance motor greater than given output voltage amplitude, then regulate the positive direction place the suspending windings electric current
When the actual output voltage of said bearing-free switch reluctance motor less than given output voltage amplitude, then regulate the positive direction place the suspending windings electric current
When required radial suspension force when negative
G.) the suspending windings electric current at adjusting positive direction place does
H.) when the actual output voltage of said bearing-free switch reluctance motor greater than given output voltage amplitude, then regulate the negative direction place the suspending windings electric current
When the actual output voltage of said bearing-free switch reluctance motor less than given output voltage amplitude, then regulate the negative direction place the suspending windings electric current
Wherein F is suspending power, N
mBe the number of turn, the N of main winding
bBe the suspending windings number of turn, i
mBe main winding current, k
f(θ) be the suspending power coefficient.
The control method of described complete-period generator of bearing-free switch reluctance motor is characterized in that also comprising the voltage hysteresis control method thereof, and concrete steps are following:
1.) stagnate ring lower limit and actual output voltage during less than given output voltage amplitude less than voltage when the actual output voltage of bearing-free switch reluctance motor, the suspending windings electric current at positive direction place does
The suspending windings electric current at negative direction place
2.) stagnate the ring upper limit and actual output voltage during greater than given output voltage amplitude greater than voltage when the actual output voltage of bearing-free switch reluctance motor, the suspending windings electric current at positive direction place does
The negative direction place the suspending windings electric current
3.) when the actual output voltage of bearing-free switch reluctance motor was in the stagnant ring of voltage centre, the suspending windings electric current was identical with last one-period.
Claims (3)
1. the control method of a complete-period generator of bearing-free switch reluctance motor is characterized in that comprising the steps:
A.) adopt the axial radial displacement transducer of β to detect said bearing-free switch reluctance motor and obtain the actual displacement of β direction of principal axis; Adopt the axial radial displacement transducer of α to detect said bearing-free switch reluctance motor and obtain the actual displacement of α direction of principal axis, said bearing-free switch reluctance motor main winding voltage is obtained main winding virtual voltage U through rectifying installation
0, wherein the β axle is the longitudinal axis in the rectangular coordinate system, the α axle is the transverse axis in the rectangular coordinate system, down together;
B.) given bearing-free switch reluctance motor β direction of principal axis is obtained bearing-free switch reluctance motor β direction of principal axis suspending power F with reference to the difference of displacement and the actual displacement of the described β direction of principal axis of step a through a PID adjuster
β *, given bearing-free switch reluctance motor α direction of principal axis is obtained bearing-free switch reluctance motor α direction of principal axis suspending power F with reference to the difference of displacement and the actual displacement of the described α direction of principal axis of step a through the 2nd PID adjuster
α *, with given bearing-free switch reluctance motor main winding reference voltage U
0 *With the described main winding virtual voltage of step a U
0Difference through pi regulator adjusted current value;
C.) with the described bearing-free switch reluctance motor β of step b direction of principal axis suspending power F
β *, α direction of principal axis suspending power F
α *, reference voltage U
0 *With main winding virtual voltage U
0Poor, regulate current value and main winding current i
m, said bearing-free switch reluctance motor stator upper position sensor detects the position signalling θ that obtains and obtains β axle, the floating winding current of α axle suspension through the suspending windings current controller;
D.) the floating winding current of the described β axle suspension of step c is obtained the Control current that said bearing-free switch reluctance motor β axle suspension is floated winding through the floating winding inverter of β axle suspension, the floating winding current of the described α axle suspension of step c is obtained the Control current of the floating winding of said bearing-free switch reluctance motor α axle suspension through the floating winding inverter of α axle suspension.
2. the control method of complete-period generator of bearing-free switch reluctance motor according to claim 1 is characterized in that asking for of the described suspending windings electric current of step c comprises the steps:
When required suspending power is correct time
E.) the suspending windings electric current
at adjusting negative direction place
F.) when the actual output voltage of said bearing-free switch reluctance motor greater than given output voltage amplitude; Then regulate the positive direction place suspending windings electric current
when the actual output voltage of said bearing-free switch reluctance motor less than given output voltage amplitude, then regulate the positive direction place suspending windings electric current
When required radial suspension force when negative
G.) the suspending windings electric current at adjusting positive direction place is
H.) when the actual output voltage of said bearing-free switch reluctance motor greater than given output voltage amplitude, then regulate the negative direction place the suspending windings electric current
When the actual output voltage of said bearing-free switch reluctance motor less than given output voltage amplitude, then regulate the negative direction place the suspending windings electric current
Wherein F is suspending power, N
mBe the number of turn, the N of main winding
bBe the suspending windings number of turn, i
mBe main winding current, k
f(θ) be the suspending power coefficient.
3. the control method of complete-period generator of bearing-free switch reluctance motor according to claim 1 and 2 is characterized in that also comprising the voltage hysteresis control method thereof after step c) finishes, and concrete steps are following:
1.) actual output voltage when bearing-free switch reluctance motor stagnates ring down in limited time less than voltage; Through output voltage and given voltage pressure reduction PI are regulated; The suspending windings electric current
at negative direction place is increased, thereby make the suspending windings electric current
at positive direction place increase;
2.) actual output voltage when bearing-free switch reluctance motor stagnates ring upward in limited time greater than voltage; Through output voltage and given voltage pressure reduction PI are regulated; Make the suspending windings electric current at positive direction place reduce for
, thus make the negative direction place suspending windings electric current
reduce;
3.) when the actual output voltage of bearing-free switch reluctance motor was in the stagnant ring of voltage centre, the suspending windings electric current was identical with last one-period.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100267774A CN101546978B (en) | 2009-05-06 | 2009-05-06 | Control method of complete-period generator of bearing-free switch reluctance motor |
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|---|---|---|---|
| CN2009100267774A CN101546978B (en) | 2009-05-06 | 2009-05-06 | Control method of complete-period generator of bearing-free switch reluctance motor |
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| CN101546978B true CN101546978B (en) | 2012-05-30 |
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| CN103337918B (en) * | 2013-06-17 | 2016-06-15 | 哈尔滨工业大学 | High speed electric system |
| CN104967361B (en) * | 2015-06-26 | 2018-01-05 | 南京航空航天大学 | Electromagnetic type bearing-free double salient-pole electric machine and its control method |
| CN114448310B (en) * | 2022-01-24 | 2023-10-10 | 江苏大学 | Five-degree-of-freedom bearingless permanent magnet synchronous generator neural network prediction decoupling controller |
| CN114448311A (en) * | 2022-01-24 | 2022-05-06 | 江苏大学 | Fuzzy neural network prediction decoupling control system for bearingless permanent magnet synchronous generator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385774C (en) * | 2005-05-27 | 2008-04-30 | 南京航空航天大学 | Bearing-free switch magnetic-resistance starting generator and control method |
| CN101299553A (en) * | 2008-03-25 | 2008-11-05 | 南京航空航天大学 | Non-bearing switch reluctance motor complete-period electrification operating control method |
-
2009
- 2009-05-06 CN CN2009100267774A patent/CN101546978B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385774C (en) * | 2005-05-27 | 2008-04-30 | 南京航空航天大学 | Bearing-free switch magnetic-resistance starting generator and control method |
| CN101299553A (en) * | 2008-03-25 | 2008-11-05 | 南京航空航天大学 | Non-bearing switch reluctance motor complete-period electrification operating control method |
Non-Patent Citations (2)
| Title |
|---|
| 曹鑫 等.一种无轴承开关磁阻电机独立控制策略.《中国电机工程学报》.2008,第28卷(第24期),94-100. * |
| 杨钢 等.无轴承开关磁阻电机平均悬浮力控制策略.《航空学报》.2009,第30卷(第3期),505-511. * |
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