CN1545202A - High-frequency induction current delivery excitation method for synchronous motor and equipment thereof - Google Patents
High-frequency induction current delivery excitation method for synchronous motor and equipment thereof Download PDFInfo
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- CN1545202A CN1545202A CNA2003101089404A CN200310108940A CN1545202A CN 1545202 A CN1545202 A CN 1545202A CN A2003101089404 A CNA2003101089404 A CN A2003101089404A CN 200310108940 A CN200310108940 A CN 200310108940A CN 1545202 A CN1545202 A CN 1545202A
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- synchronous motor
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- rotator
- excitation
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 27
- 230000005284 excitation Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000006698 induction Effects 0.000 title abstract 2
- 238000004804 winding Methods 0.000 claims abstract description 18
- 230000001939 inductive effect Effects 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The invention discloses a synchronous motor's high frequency induction feeding excitation method, on the basis that the three-phase stator windings are charged with three-phase currents, superposing high-frequency 120 deg phase-shifted currents; because high-frequency current's magnetic field's fundamental component's rotary speed nh differs form rotary speed of the synchronous motor, which makes high-frequency current's magnetic field cut the rotator generative coil to generate induced electromotive force, the generator outputs voltage, which is rectified into a DC voltage and sent to the rotator excitation coil to implement excitation. The device includes stator three-phase power supply, stator three-phase windings, rotary rectifier, rotator excitation winding, stator and rotator, and adds a group of rotator generative coils to the synchronous motor rotator. Its advantages: 1) it can implement excitation without AC exciter, largely saving cost; 2) it needs only a group of generative coils added on the rotator and the coils can be used by connecting with existing rotary rectifier; 3) exciting current is convenient to control.
Description
Technical field
The present invention relates to a kind of synchronous motor high frequency inductive power supply exciting method and device thereof.
Background technology
Synchronous motor adopts the AC exciter excitation.Because excitation system structure more complicated has limited its application in middle and small motor.Along with the continuous development of electronics, motor technology and perfect, the miniaturization of excitation system will become developing direction.
Summary of the invention
The invention provides a kind of synchronous motor high frequency inductive power supply exciting method and device thereof.
It is the high-frequency current of superposition phase mutual deviation 120 degree on the basis of the three-phase stator winding feeding three-phase current of synchronous motor; Because the fundametal compoment rotary speed n in the magnetic field that high-frequency current produces
hRotary speed n with synchronous motor
0Have difference, make high-frequency current magnetic field intercepts rotor power coil produce induced electromotive force, generator output voltage is rectified into direct voltage through rectifying device, gives rotor excitation coil, realizes excitation.
Device comprises stator three phase mains, three-phase stator winding, rotating rectifier, rotor-exciting winding, stator, and rotor increases by a group rotor power coil on synchronous electric motor rotor.
Advantage of the present invention
1) do not need AC exciter just can realize excitation, save cost greatly;
2) only need on rotor, add one group of power coil, be connected and to use with original rotary rectification device;
3) exciting current control is convenient.
Description of drawings
Fig. 1 high frequency inductive power supply excitation principle figure
Fig. 2 synchronous motor high frequency inductive power supply excitation schematic diagram
Among the figure: 1 stator three phase mains (comprising fundamental current source and source of high frequency current); 2 three-phase stator winding; 3 rotors generating winding; 4 rotating rectifiers; 5 rotor-exciting windings; 6 stators; 7 rotors generating slot for winding;
Embodiment
Key of the present invention is the high-frequency current of the certain amplitude certain frequency of superposition phase mutual deviation 120 degree on the basis of the three-phase stator winding feeding three-phase current of synchronous motor; On synchronous electric motor rotor, increase by a group rotor power coil simultaneously.Because the fundametal compoment rotary speed n in the magnetic field (high-frequency current travelling-magnetic-field) that high-frequency current produces
hRotary speed n with synchronous motor
0There is difference, makes high-frequency current magnetic field intercepts rotor power coil produce induced electromotive force.Generator output voltage is rectified into direct voltage through rectifying device, gives rotor excitation coil, realizes excitation.
Said high-frequency current is produced by former three phase converter or additional three phase converter.
Former three-phase current produces travelling-magnetic-field in stator, its fundametal compoment F
0Rotating speed be n
0=60f
0/ p, f
0Be the frequency of former three-phase current, p is the number of pole-pairs of motor.
The high-frequency current of stack produces additional travelling-magnetic-field, its fundametal compoment F in synchronous motor
hRotating speed be n
h=60f
h/ p, f
hBe the frequency of overlapped high-frequency electric current, p is the number of pole-pairs of motor.
The rotor power coil is with leg speed n
0Rotate with rotor, exist relative rotation speed n=n with the fundametal compoment of high-frequency current travelling-magnetic-field
h-n
0=60 (f
h-f
0)/p, by the electromagnetic field basic principle, the rotor power coil will induce electromotive force.The output of power coil and (f
h-f
0) be directly proportional, therefore can regulate exciting current by regulating frequency and the amplitude of injecting high-frequency current, make synchronous motor be operated in suitable state.
Because the amplitude of the high-frequency current of stack is relative with the amplitude of former three-phase current less, that is its high-frequency current travelling-magnetic-field amplitude that causes is relative less with the travelling-magnetic-field amplitude (drive motors rotation) that primary current causes, so this method is less for the torque pulsation and the magnetic loss influence of synchronous motor.
1) three-phase stator winding: three symmetrical fundamental currents and high-frequency current inject simultaneously.The travelling-magnetic-field drive motors rotation that fundamental current produces, rotating speed is n
0=60f
0/ p; High-frequency current produces additional travelling-magnetic-field in motor, rotating speed is n
h=60f
h/ p.
2) rotor-exciting winding: pass to direct current, with synchronous speed n
0=60f
0/ p rotation produces rotating magnetic field.
3) rotor generating winding: be equivalent to rotating armature, rotating speed is n
0=60f
0/ p, cutting high-frequency current travelling-magnetic-field produces induced current.
4) rotating rectifier: the alternating current of rotor power coil output is rectified into direct current, exports to rotor-exciting winding excitation.
Can see that from structure high frequency inductive power supply excitation synchronous motor and original motor difference are: set up one group of power coil on rotor, this group coil cuts the generating of high-frequency current travelling-magnetic-field because of rotary speed is different.
Claims (3)
1. synchronous motor high frequency inductive power supply exciting method is characterized in that three-phase stator winding at synchronous motor feeds the high-frequency current of superposition phase mutual deviation 120 degree on the basis of three-phase current; Because the fundametal compoment rotary speed n in the magnetic field that high-frequency current produces
hRotary speed n with synchronous motor
0Have difference, make high-frequency current magnetic field intercepts rotor power coil produce induced electromotive force, generator output voltage is rectified into direct voltage through rectifying device, gives rotor excitation coil, realizes excitation.
2. a kind of synchronous motor high frequency inductive power supply exciting method according to claim 1 is characterized in that it is to adopt to increase by a group rotor power coil on synchronous electric motor rotor that said high-frequency current magnetic field intercepts rotor power coil produces induced electromotive force.
3. synchronous motor high frequency inductive power supply excitation unit, it comprises stator three phase mains (1), three-phase stator winding (2), rotating rectifier (4), rotor-exciting winding (5), stator (6), and rotor (7) is characterized in that increasing a group rotor power coil (3) on synchronous electric motor rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101089404A CN1545202A (en) | 2003-11-25 | 2003-11-25 | High-frequency induction current delivery excitation method for synchronous motor and equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101089404A CN1545202A (en) | 2003-11-25 | 2003-11-25 | High-frequency induction current delivery excitation method for synchronous motor and equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1545202A true CN1545202A (en) | 2004-11-10 |
Family
ID=34334953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101089404A Pending CN1545202A (en) | 2003-11-25 | 2003-11-25 | High-frequency induction current delivery excitation method for synchronous motor and equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1545202A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730997A (en) * | 2014-01-06 | 2014-04-16 | 南京航空航天大学 | Excitation integrated type brushless synchronous motor |
| CN105164903A (en) * | 2013-03-21 | 2015-12-16 | 菲艾姆股份有限公司 | Synchronous machine |
| WO2019134784A1 (en) * | 2018-01-04 | 2019-07-11 | Abb Schweiz Ag | Exciterless synchronous machine with damper bars |
| CN112134468A (en) * | 2020-09-29 | 2020-12-25 | 陕西省计量科学研究院 | Alternating current phase-adjustable power supply based on rotating magnetic field |
-
2003
- 2003-11-25 CN CNA2003101089404A patent/CN1545202A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105164903A (en) * | 2013-03-21 | 2015-12-16 | 菲艾姆股份有限公司 | Synchronous machine |
| CN103730997A (en) * | 2014-01-06 | 2014-04-16 | 南京航空航天大学 | Excitation integrated type brushless synchronous motor |
| CN103730997B (en) * | 2014-01-06 | 2016-03-30 | 南京航空航天大学 | A kind of excitation integrated form brushless synchronous machine |
| WO2019134784A1 (en) * | 2018-01-04 | 2019-07-11 | Abb Schweiz Ag | Exciterless synchronous machine with damper bars |
| CN112134468A (en) * | 2020-09-29 | 2020-12-25 | 陕西省计量科学研究院 | Alternating current phase-adjustable power supply based on rotating magnetic field |
| CN112134468B (en) * | 2020-09-29 | 2022-03-08 | 陕西省计量科学研究院 | Alternating current phase-adjustable power supply based on rotating magnetic field |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |