CN101924440A - Synchronous motor brushless excitation device realized by adopting switching power supply - Google Patents
Synchronous motor brushless excitation device realized by adopting switching power supply Download PDFInfo
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- CN101924440A CN101924440A CN2010102502979A CN201010250297A CN101924440A CN 101924440 A CN101924440 A CN 101924440A CN 2010102502979 A CN2010102502979 A CN 2010102502979A CN 201010250297 A CN201010250297 A CN 201010250297A CN 101924440 A CN101924440 A CN 101924440A
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Abstract
The invention relates to a synchronous motor brushless excitation device realized by adopting a switching power supply. In a synchronous motor, because an electric brush is wore, an operator needs to frequently patrol for replacing the electric brush, and meanwhile, the electric brush always causes stronger high-frequency electromagnetic interference in a working process to worsen the electromagnetic environment of a motor system and bring serious electromagnetic interference for a driving system. The synchronous motor brushless excitation device comprises a stator (1) and a rotor (2) of a synchronous motor, wherein a controller (3) is arranged in the stator and is connected with an inverter (4), the inverter is connected with a magnetic-tank transformer which is connected with a rectifier (5), and the rectifier is connected with an excitation winding (6) which is wound on an iron core of the rotor. The invention is used for a synchronous motor.
Description
Technical field:
The present invention relates to a kind of employing Switching Power Supply and realize synchronous motor brushless excitation device.
Background technology:
Permagnetic synchronous motor is because advantage such as its rotating speed height, volume be little, simple in structure, reliable, all obtained extensive use in every field, but because the high-coercive force of rare-earth permanent magnet makes the magnetic field of permanent magnet generator be difficult to regulate, poor controllability, and cost is higher.By contrast, excitation electromotor is set up by exciting current can control and regulate excitation field flexibly, and cost is lower, so excitation electromotor is progressively replacing magneto.Present brush excitation electromotor biggest advantage is arranged is that motor and excitation system boundary are obvious, relatively independent, simple and clear, and rotor excitation current, exciting voltage obtain easily, and numerical value is accurate, and maintenance makes things convenient for.But because the existence of brush has increased contact resistance, along with the increase of exciting current, brush and slip ring usually cause heating because of loose contact, can produce ring fire and burn out brush holder and slip ring when serious, and the quality of brush also directly has influence on operation stability, thereby failure rate is higher.The carbon dust of brush generation when wearing and tearing affects to environmental sanitation in addition, and pollutes bearing pedestal easily, reduces its insulation, brings hidden danger to safe operation.Because there are wearing and tearing in brush, the operations staff will often make an inspection tour, and changes brush.Simultaneously, brush often causes that in the course of the work stronger high-frequency electromagnetic disturbs, and worsens the electromagnetic environment of electric system, brings serious electromagnetic interference to drive system.
Publication number is the synchronous generator brushless excitation device of CN2309013Y, with the coaxial DC exciter that is equipped with of synchronous generator, DC exciter has two stators, and the magnetic pole of two stators is staggeredly arranged, the magnetic pole number of each stator is identical with the magnetic pole number of generator amature, each pole coil of each stator is connected respectively, and passes to big or small same phase respectively and differ 90 ° alternating current and realize brushless excitation.But this device for realize excitation, encourage by force, the function of demagnetization and measurement, still need slip ring and brush, do not realize the brushless excitation of real meaning.
Publication number is the transistor switching automatic magnetic exciting device of CN86100740A, adopts the high power transistor Switching Power Supply, regulates exciting current by the mode of measuring voltage oxide-semiconductor control transistors switch conduction ratio.This automatic excitation regulator just utilizes switching technique to pay close attention to the foundation and the adjusting of excitation field, does not realize brushless.
The excitation system of switching power supply of synchro generator of publication number CN1329393A, adopt the super high power Switching Power Supply to replace AC exciter, attached exciter and SCR rectification circuit, make the exciting current of generator and line voltage, generator output voltage irrelevant fully.Though this system is applied to excitation system with Switching Power Supply, just replaced exciter, do not replace brush and slip ring.
All there is a common ground in above patent, does not have real cancellation brush and slip ring exactly, and structure is complicated simultaneously.
Summary of the invention:
The purpose of this invention is to provide a kind of Switching Power Supply that adopts and be substituted with the brush brush of excitation system and the brushless excitation system of slip-ring device, make motor both have the high advantage of permagnetic synchronous motor efficient, have the adjustable characteristics of magnetic flux again.
Above-mentioned purpose realizes by following technical scheme:
Adopt Switching Power Supply to realize synchronous motor brushless excitation device, its composition comprises: the stator of synchronous machine and rotor, described stator the inside installation and control device, described controller connects inverter, described inverter connects magnetic jar transformer, described magnetic jar transformer connects rectifier, and described rectifier connects excitation winding, and described excitation winding is wound on the iron core of described rotor.
Described employing Switching Power Supply realizes synchronous motor brushless excitation device, described magnetic jar transformer comprises the primary coil that is installed on the described stator, described primary coil is by the air gap secondary coil that is coupled, and described secondary coil is installed in the rotating shaft of described rotor.
Described employing Switching Power Supply realizes synchronous motor brushless excitation device, and described air gap is between 0.4-0.6mm.
Beneficial effect:
1. the present invention utilizes magnetic jar transformer can replace the collector ring and the brush of excitation system, has realized brushless excitation, and is simple in structure.
2, the switching tube by the by-pass cock power supply comes pressure regulation, reaches the purpose of regulating magnetic flux.
3, the loss of electric excitation part is little, has the permanent magnet generator high-efficiency characteristics.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present invention.
Accompanying drawing 2 is front views of the present invention.
Accompanying drawing 3 is A-A profiles of accompanying drawing 2.
Accompanying drawing 4 is structured flowcharts of the present invention.
Accompanying drawing 5 is full-bridge rectification Switching Power Supply fundamental diagrams.
Accompanying drawing 6 is full-wave rectification Switching Power Supply fundamental diagrams.
Embodiment:
Embodiment 1:
Adopt Switching Power Supply to realize synchronous motor brushless excitation device, its composition comprises: the stator 1 of synchronous machine and rotor 2, described stator the inside installation and control device 3, described controller connects inverter 4, described inverter connects magnetic jar transformer, described magnetic jar transformer connects rectifier 5, and described rectifier connects excitation winding 6, and described excitation winding is wound on the iron core of described rotor.
Described employing Switching Power Supply realizes synchronous motor brushless excitation device, described magnetic jar transformer comprises the primary coil 7 that is installed on the described stator, described primary coil is by air gap coupling secondary coil 8, and described secondary coil is installed in the rotating shaft 9 of described rotor.
Described employing Switching Power Supply realizes synchronous motor brushless excitation device, and described air gap is between 0.4-0.6mm.
Embodiment 2:
Shown in accompanying drawing 1-3, secondary unshakable in one's determination 10 and rectifier of magnetic jar transformer and electric machine rotor iron core and excitation winding arranged in co-axial alignment.Another part of Switching Power Supply is installed on the synchronous motor stator, controller and inverter are placed in the stator case cavity, the common DC bus is arranged in the stator case inner surface, and magnetic jar primary iron core 11 is fixed on the motor stator end, and relative with the secondary iron core of magnetic jar transformer, between the primary and secondary iron core about the 0.5mm of gap.The secondary coil of magnetic jar transformer is wrapped in secondary the inside unshakable in one's determination, and primary coil is wrapped in elementary the inside unshakable in one's determination.
As shown in Figure 4, controller is finished the control to inverter under the DC bus-bar voltage power supply, export 4 way switch pipes of 4 road pwm signal control inverters, realize that direct current signal becomes the inversion process of AC signal, AC signal is supplied with the elementary winding of magnetic jar transformer, elementary winding produces alternating magnetic field under the AC signal effect, be coupled to the exciting current that secondary winding produces alternation by air gap, thereby supplies with the excitation field that the rotor-exciting winding produces motor behind rectifier rectification.All devices are the motor rotating part in the frame of broken lines.
Fig. 5 and Fig. 6 understand that specifically Switching Power Supply realizes the process of brushless excitation, and Switching Power Supply adopts isolated full-bridge DC-DC converter.4 switching transistor V1 of Fig. 5, V2, V3, V4 forms the full-bridge switch inverter circuit, the turn-on and turn-off of high-frequency PWM pulse signal wheel flow control switch pipe, in the switch periods, the first half period V1, the V4 conducting, V2, V3 turn-offs; The second half period V2, the V3 conducting, V1, V4 turn-offs.So DC input voitage VCC is transformed to the high-frequency ac square-wave voltage, realize the DC-AC conversion, and the frequency of ac square-wave voltage is determined by the PWM frequency.Ac square-wave voltage through rectification and LC filter circuit, obtains VD again through the high frequency transformer buck, realizes the AC-DC conversion, is responsible for powering to the rotor excitation winding.Rectifying part wherein can adopt is not with tapped transformer to carry out the single-phase full bridge rectification, as shown in Figure 5.The band tapped transformer carries out the single-phase full wave rectification in the middle of also can adopting, as shown in Figure 6.
Claims (3)
1. one kind is adopted Switching Power Supply to realize synchronous motor brushless excitation device, its composition comprises: the stator of synchronous machine and rotor, it is characterized in that: described stator the inside installation and control device, described controller connects inverter, described inverter connects magnetic jar transformer, described magnetic jar transformer connects rectifier, and described rectifier connects excitation winding, and described excitation winding is wound on the iron core of described rotor.
2. employing Switching Power Supply according to claim 1 realizes synchronous motor brushless excitation device, it is characterized in that: described magnetic jar transformer comprises the primary coil that is installed on the described stator, described primary coil is by the air gap secondary coil that is coupled, and described secondary coil is installed in the rotating shaft of described rotor.
3. employing Switching Power Supply according to claim 2 realizes synchronous motor brushless excitation device, and it is characterized in that: described air gap is between 0.4-0.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010250297.9A CN101924440B (en) | 2010-08-11 | 2010-08-11 | Synchronous motor brushless excitation device realized by adopting switching power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010250297.9A CN101924440B (en) | 2010-08-11 | 2010-08-11 | Synchronous motor brushless excitation device realized by adopting switching power supply |
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| CN101924440A true CN101924440A (en) | 2010-12-22 |
| CN101924440B CN101924440B (en) | 2014-12-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651274A (en) * | 2011-02-28 | 2012-08-29 | 通用汽车环球科技运作有限责任公司 | High frequency rotary transformer for synchronous electrical machines |
| CN104348306A (en) * | 2013-08-05 | 2015-02-11 | 通用汽车环球科技运作有限责任公司 | Electric power assembly for a vehicle |
| CN104753301A (en) * | 2015-04-10 | 2015-07-01 | 锦州汉拿电机有限公司 | High-frequency transformer based brushless claw-pole generator |
| CN105471173A (en) * | 2014-09-26 | 2016-04-06 | 波音公司 | Synchronous Machine With Common Motor/Generator Exciter Stage |
| CN110355109A (en) * | 2019-07-11 | 2019-10-22 | 诺力智能装备股份有限公司 | A kind of rotary-type sorter of radio set driving |
Citations (4)
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| US6051953A (en) * | 1998-07-24 | 2000-04-18 | Vithayathil; Joseph | Brushless exciterless field system for AC synchronous machines |
| CN1329393A (en) * | 2001-08-06 | 2002-01-02 | 郁百超 | Excitation system of switching power supply of synchro generator |
| CN1835351A (en) * | 2006-03-08 | 2006-09-20 | 南京航空航天大学 | Synchrous dynamo exciter of rotatable power electronic converter |
| CN201781392U (en) * | 2010-08-11 | 2011-03-30 | 哈尔滨理工大学 | Device for realizing brushless excitation of synchronous motor by switching power supply |
-
2010
- 2010-08-11 CN CN201010250297.9A patent/CN101924440B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6051953A (en) * | 1998-07-24 | 2000-04-18 | Vithayathil; Joseph | Brushless exciterless field system for AC synchronous machines |
| CN1329393A (en) * | 2001-08-06 | 2002-01-02 | 郁百超 | Excitation system of switching power supply of synchro generator |
| CN1835351A (en) * | 2006-03-08 | 2006-09-20 | 南京航空航天大学 | Synchrous dynamo exciter of rotatable power electronic converter |
| CN201781392U (en) * | 2010-08-11 | 2011-03-30 | 哈尔滨理工大学 | Device for realizing brushless excitation of synchronous motor by switching power supply |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651274A (en) * | 2011-02-28 | 2012-08-29 | 通用汽车环球科技运作有限责任公司 | High frequency rotary transformer for synchronous electrical machines |
| CN104348306A (en) * | 2013-08-05 | 2015-02-11 | 通用汽车环球科技运作有限责任公司 | Electric power assembly for a vehicle |
| CN105471173A (en) * | 2014-09-26 | 2016-04-06 | 波音公司 | Synchronous Machine With Common Motor/Generator Exciter Stage |
| US10305356B2 (en) | 2014-09-26 | 2019-05-28 | The Boeing Company | Synchronous machine with common motor/generator exciter stage |
| CN105471173B (en) * | 2014-09-26 | 2019-09-17 | 波音公司 | With common motor/generator excitation machine platform synchronous machine |
| US10784757B2 (en) | 2014-09-26 | 2020-09-22 | The Boeing Company | Synchronous machine with common motor/generator exciter stage |
| CN104753301A (en) * | 2015-04-10 | 2015-07-01 | 锦州汉拿电机有限公司 | High-frequency transformer based brushless claw-pole generator |
| CN110355109A (en) * | 2019-07-11 | 2019-10-22 | 诺力智能装备股份有限公司 | A kind of rotary-type sorter of radio set driving |
| CN110355109B (en) * | 2019-07-11 | 2021-04-06 | 诺力智能装备股份有限公司 | Wireless motor drive rotary wheel type sorting machine |
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| CN101924440B (en) | 2014-12-10 |
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