CN1564428A - Permanent manget ac generator with controllable excitation double winding - Google Patents
Permanent manget ac generator with controllable excitation double winding Download PDFInfo
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- CN1564428A CN1564428A CNA2004100129146A CN200410012914A CN1564428A CN 1564428 A CN1564428 A CN 1564428A CN A2004100129146 A CNA2004100129146 A CN A2004100129146A CN 200410012914 A CN200410012914 A CN 200410012914A CN 1564428 A CN1564428 A CN 1564428A
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Abstract
Disclosed generator includes magneto alternator and compensate controller. Two sets of main winding and compensation winding in same number of poles are installed on armature of the magneto alternator. Based on measured signal of main winding, current and voltage detector in compensate controller tracks magnitude, phase and frequency of armature current. Based on tracking signal, controller of inversion injects current controllable in phase, magnitude, and in identical frequency to current in main winding to secondary winding in order to provide excitation magnetic potential to main winding. Digital technique and technique of tracking current and voltage in real time adopted in compensate controller. The invention reaches high precision for adjusting terminal voltage of generator.
Description
Technical field
The invention belongs to the alternating current generator excitation control technology field in the electromechanical engineering field, be specifically related to a kind of double winding magneto alternator of controlled excitation.
Technical background
China is world rare earth element reserves big country, and the research and development of rare earth permanent-magnetic material also reach world-class levels.The rare earth permanent magnet alternating current generator has that volume is little, light weight, efficient height and the high outstanding advantage of reliability, in aviation, national defence and need the field of independent current source that broad prospect of application is arranged.Yet magneto alternator is once making, and its excitation is constant can't regulate.Thereby its terminal voltage changes thereupon when load changes, when especially being with inductive load, because the demagnetizing effect of armature reaction, the terminal voltage of generator changes bigger, therefore, magneto alternator to keep terminal voltage constant or have less voltage change ratio relatively the difficulty.At present, various pressure regulation or method for stabilizing voltage have been adopted both at home and abroad, add Technics of Power Electronic Conversion voltage regulator method or the like as compound rectifier excitation method, two stator or birotor method, generator, the shortcoming of these methods is not that complex structure is exactly the cost height, especially for permanent magnet high power alternator, be difficult to developed.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, a kind of controlled excitation double winding magneto alternator is provided, it adopts better simply structure to realize the controllable adjustment of magneto alternator terminal voltage, and its manufacturing cost is lower.
A kind of controlled excitation double winding magneto alternator provided by the invention comprises magneto alternator and compensating controller.Be mounted with two cover windings on the armature of magneto alternator, wherein, a cover is symmetrical three-phase or heterogeneous main winding, and as the power supply winding that power output is provided, another set of is symmetrical three-phase or heterogeneous auxiliary winding, by way of compensation winding.Main winding is identical with the auxiliary winding number of poles, and the phase difference between each corresponding phase is α, and the span of α is :-90 °≤α≤+ 90 °.The leading-out terminal of auxiliary winding links to each other with the leading-out terminal of the main winding of generator, or links to each other with the external power of main winding induced electromotive force same frequency.Compensating controller is made of current/voltage detector and transform controller, and the current/voltage detector is according to detected signal of main winding, the size of real-time tracking armature supply, phase place and frequency signal; The signal that transform controller is provided according to the current/voltage detector, to the auxiliary winding of generator inject controllable phase and size, with the generator main winding electric current of same frequency is arranged, the afford redress excitation magnetic potential of winding is to realize the adjusting to generator voltage.
The present invention has following technique effect: compare with the magneto alternator of the compound rectifier excitation method of existing employing, two stator or birotor method, electric generator structure of the present invention is simple, because it only need be on same armature increases by a cover winding in the groove of (stator or rotor), be used as the compensation winding, and the permanent magnetism magnetic pole structure of motor (rotor or stator) is identical with normal permanent magnet generator.Compare with adopting Technics of Power Electronic Conversion voltage regulator method, compensating controller of the present invention only provides the electric current of controllable phase with size for the compensation winding, and the main winding capacity is less relatively.Because compensating controller can adopt modern digital technology and current/voltage real-time tracking, the terminal voltage of generator can be regulated with load variations automatically according to predefined command request, makes it to reach very high degree of regulation simultaneously.
Description of drawings
Fig. 1 is a kind of control excitation double winding magneto alternator key wiring diagram provided by the invention;
Fig. 2 is a phasor diagram, wherein, and E
01Be main winding excitation phase potential phasor, U is a main winding terminal voltage phasor, I
1Be main winding phase current phasor, F
1aBe main winding armature reaction magnetic potential phasor, F
1adBe main winding d-axis armature reaction magnetic potential phasor, F
1aqBe main winding quadrature axis armature reaction magnetic potential phasor, Θ is that the phase angle between main winding excitation phase potential phasor and the terminal voltage phasor is the merit angle, and ψ is the internal power factor angle of main winding, and is the external power factor angle of main winding, E
02Be auxiliary winding excitation phase potential phasor, I
2Be auxiliary winding phase current phasor, F
2aBe auxiliary winding armature reaction magnetic potential phasor, F
2adBe auxiliary winding d-axis armature reaction magnetic potential phasor, F
2aqBe auxiliary winding quadrature axis armature reaction magnetic potential phasor, α is an auxiliary winding excitation phase potential phasor and the main winding excitation phase angle between the potential phasor mutually, and β is an auxiliary winding phase current phasor and the auxiliary winding excitation phase angle between the potential phasor mutually;
Fig. 3 is the structural representation of a specific embodiment of the present invention.
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing and example.
As shown in Figure 1, the present invention is made of two unit: magneto alternator 1 and compensating controller 2.
The two cover windings of settling on the armature not only can be symmetrical three phase windings, also can be symmetrical polyphase windings.
The function of compensating controller 2 is to provide controllable phase and big or small electric current according to command request for the compensation winding, and it is made of current/voltage detector 2-1 and transform controller 2-2.By electric current and voltage sensor senses to signal (comprising size and phase place) send among the current/voltage detector 2-1, by size, phase place and frequency real-time tracking to armature supply, via transform controller 2-2, to the compensation winding abc of generator inject controllable phase and size, with generator main winding ABC the electric current of same frequency is arranged, the excitation magnetic potential of winding affords redress, with the d-axis armature reaction magnetic potential that produces by armature supply under the compensation arbitrary load, thereby reach the purpose of stable electric generation set end voltage.This device also can regulator generator power factor.
Be the volume that reduces generator, the whole efficiency that improves device, transform controller 2-2 preferably selects converters for use.
As shown in Figure 2, when the compensation winding is ahead of α angle of main winding in the position in space, correspondingly, the induced potential phasor E of compensation winding
02The induced potential phasor E of also leading main winding
01A α angle.By the current/voltage sensor to electric current I
1The size and with respect to E
01Phase angle ψ, pass the signal to transform controller, make to be injected into size and the phase place that the electric current of compensation in the winding can the real-time tracking armature supply, and carry out numeral and control I
2Size and phase place for example make electric current phasor I
2Leading phasor E
02A phase angle β is by the armature reaction magnetic potential F of compensation winding generation
2a, its d-axis armature reaction magnetic potential F
2ad, the d-axis armature reaction magnetic potential F that compensation is produced by armature supply
1ad, to realize voltage-regulation.
Three-phase main winding d-axis armature reaction magnetic potential F
1adFor:
F
1ad=F
1aIn the sin ψ formula, F
1a-three-phase main winding armature reaction composite magnetic power, ψ-internal power factor angle, i.e. armature main winding phase current phasor I
1With main winding excitation potential phasor E
01Between the phase angle.Work as F
2ad=F
1adThe time, be called full compensation, work as F
2ad＜F
1adThe time, be called undercompensation, work as F
2ad＞F
1adThe time, be called overcompensation.Bright through theoretical computational chart, under full compensation situation, the voltage change ratio of magneto alternator can be controlled in 2%.If further adopt voltage-tracing control, the precision of voltage regulation can also improve.
Example:
As shown in Figure 3, three-phase permanent magnet alternator 3, rated voltage 380V, frequency 50Hz, and at stator installation compensation winding, compensation winding 3-1 and main winding 3-2 same-phase are arranged, mutually insulated.Compensating controller adopts three-phase pulse width modulated (PWM) inverter 6 (AC-DC-AC modes), carries out digital control with digital signal processor (DSP) 9.But the three-phase alternating current of controller power supply external power is powered separately, also can supply with from this generator, and three-phase alternating-current supply obtains the 540V direct voltage through over commutation, filtering, for the protection rectifier bridge, designs soft starting circuit between rectification and filtering.Converter main circuit adopts Intelligent Power Module (IMP) 5, is reverse into the afford redress excitation of winding of three-phase alternating current by the PWM mode.The controlled function of control unit is finished by DSP, the electric current of the voltage of main winding, electric current and compensation winding is by transducer, preposition amplification 4,7, by sampling of the AD port of DSP and conversion, external command and parameter offer DSP by keyboard or serial communication interface 12, partial status (as voltage, compensation phase angle, electric current, power factor) shows that by display 10 device is provided with fault detect 8 and power source voltage detects 11.According to the design of system, on control algolithm, take electric current, voltage double circle structure, interior ring is compensation winding current closed loop, use vector control technology, guarantee that compensation winding current phase place and main winding are synchronous, amplitude and phase difference tracing preset value, adjuster adopts pi regulator.Voltage loop mainly realizes the closed-loop adjustment of main winding voltage stabilizing.
Except that above-mentioned example, persons skilled in the art can adopt the present invention of multiple mode specific implementation according to technical scheme provided by the invention, do not enumerate one by one at this.
Claims (2)
1, a kind of controlled excitation double winding magneto alternator is characterized in that: comprise magneto alternator (1) and compensating controller (2);
Be mounted with two cover windings on the armature of magneto alternator (1), wherein, one cover is symmetrical three-phase (ABC) or heterogeneous main winding, as the power supply winding that power output is provided, another set of is symmetrical three-phase (abc) or heterogeneous auxiliary winding, winding by way of compensation, main winding is identical with the auxiliary winding number of poles, phase difference between each corresponding phase is α, the span of α is :-90 °≤α≤+ 90 °, the leading-out terminal of auxiliary winding (R, S, T) links to each other with the leading-out terminal (U, V, W) of the main winding of generator, or links to each other with the external power of main winding induced electromotive force same frequency;
Compensating controller (2) is made of current/voltage detector (2-1) and transform controller (2-2), and current/voltage detector (2-1) is according to the signal of detected main winding (ABC), the size of real-time tracking armature supply, phase place and frequency signal; The signal that transform controller (2-2) provides according to current/voltage detector (2-1), to the auxiliary winding (abc) of generator inject controllable phase and size, with generator main winding (ABC) electric current of same frequency is arranged, the afford redress excitation magnetic potential of winding is to realize the adjusting to generator voltage.
2, generator according to claim 1 is characterized in that: described transform controller (2-2) is the Technics of Power Electronic Conversion controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100129146A CN100347937C (en) | 2004-03-27 | 2004-03-27 | Permanent manget ac generator with controllable excitation double winding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100129146A CN100347937C (en) | 2004-03-27 | 2004-03-27 | Permanent manget ac generator with controllable excitation double winding |
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| Publication Number | Publication Date |
|---|---|
| CN1564428A true CN1564428A (en) | 2005-01-12 |
| CN100347937C CN100347937C (en) | 2007-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100129146A Expired - Fee Related CN100347937C (en) | 2004-03-27 | 2004-03-27 | Permanent manget ac generator with controllable excitation double winding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022021450A1 (en) * | 2020-07-31 | 2022-02-03 | 宁德时代新能源科技股份有限公司 | Electric motor, power system, control method, and electric vehicle |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58204754A (en) * | 1982-05-24 | 1983-11-29 | Nissan Motor Co Ltd | Ac generator |
| US4959605A (en) * | 1988-11-22 | 1990-09-25 | Sundstrand Corporation | Hybrid permanent magnet and variable reluctance generator |
| US5502368A (en) * | 1994-06-06 | 1996-03-26 | Ecoair Corp. | Hybrid alternator with voltage regulator |
| US6700242B2 (en) * | 2000-12-28 | 2004-03-02 | Hideo Kawamura | Magnetic flux controls for permanent-magnet motor-generator |
| CN2710241Y (en) * | 2004-03-27 | 2005-07-13 | 华中科技大学 | Controllable excitation double winding permanent magnet AC generator |
-
2004
- 2004-03-27 CN CNB2004100129146A patent/CN100347937C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022021450A1 (en) * | 2020-07-31 | 2022-02-03 | 宁德时代新能源科技股份有限公司 | Electric motor, power system, control method, and electric vehicle |
| CN114555415A (en) * | 2020-07-31 | 2022-05-27 | 宁德时代新能源科技股份有限公司 | Motor, power system, control method and electric automobile |
| EP4043275A4 (en) * | 2020-07-31 | 2022-12-28 | Contemporary Amperex Technology Co., Limited | Electric motor, power system, control method, and electric vehicle |
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| CN100347937C (en) | 2007-11-07 |
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