CN201323515Y - A radial magnetic-field brushless doubly-fed double-mechanical-port motor - Google Patents

A radial magnetic-field brushless doubly-fed double-mechanical-port motor Download PDF

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Publication number
CN201323515Y
CN201323515Y CNU2008201935745U CN200820193574U CN201323515Y CN 201323515 Y CN201323515 Y CN 201323515Y CN U2008201935745 U CNU2008201935745 U CN U2008201935745U CN 200820193574 U CN200820193574 U CN 200820193574U CN 201323515 Y CN201323515 Y CN 201323515Y
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China
Prior art keywords
winding
rotor
stator
external rotor
mechanical
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CNU2008201935745U
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Chinese (zh)
Inventor
万山明
黄声华
陈骁
庞珽
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华中科技大学
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Priority to CNU2008201935745U priority Critical patent/CN201323515Y/en
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Abstract

The utility model provides a radial magnetic-field brushless doubly-fed double-mechanical-port motor belonging to alternating current motors and technology control field thereof and comprising a mechanical part and an electric part, wherein the mechanical part sequentially comprises an inner rotor whose external surface is pasted with a set of permanent magnets, an outer rotor and a stator from inside to outside, the electric part comprises a stator winding, an outer rotor winding and an altering current / direct current / altering current electric energy converter, wherein the outer rotor winding comprises an independent outer rotor control winding and an outer rotor compound winding, and the outer rotor compound winding itself is a set of winding but can realize the functions of two sets of different electrically-unconnected windings through winding reuse technology. Furthermore, the magnetic field between the independent outer rotor control winding and the permanent magnets of the inner rotor are mutually coupled, the magnetic field between the outer rotor compound winding and the stator control winding are mutually coupled, on one hand, the magnetic fields between the outer rotor compound winding and the stator control winding are mutually coupled, on the other hand, the magnetic fields between the outer rotor and a stator power winding are also mutually coupled, further, the two magnetic fields are mutually decoupled. The radial magnetic-field brushless doubly-fed double-mechanical-port motor can enhance winding utilization ratio and reduce motor volume.

Description

A kind of brushless double feed double-mechanical-port motor of radial magnetic field
Technical field
The utility model belongs to alternating current machine and control technology field thereof, is specifically related to a kind of double-mechanical-port motor of birotor brushless feed.
Background technology
The speed regualtion of AC motor method comprises pole changing and frequency control, and in addition, induction alternating current (AC) motor can also become the slip speed governing.Pole changing can not continuous speed adjustment, is of limited application.Frequency control need be used and the frequency converter of motor with capacity, cost height.Become the slip speed governing and be divided into energy-dissipating type and feedback type change slip speed governing again, the power consumption during the former speed governing is very big, and operational efficiency is low, and the scope of application is also limited; Slip energy loopback power supply when the latter can be with electric machine speed regulation, the operational efficiency height is as string utmost point speed governing and doubly-fed adjustable speed system.
One cover, three phase windings are arranged on the doubly-fed adjustable speed AC induction motor rotor at present, with brush the rotor three-phase winding is connected with electrical energy transformer, and, regulate rotating speed of motor by electrical energy transformer and AC network positive energy exchange by collector ring.In order to eliminate the wearing and tearing between collector ring and the brush and the unreliability of operation, 20 beginning of the century Hunt propose prototype Self-cascading motor, and are improved by people such as Broadway the seventies and to become brushless dual-feed motor; Wallace Alan K designed a kind of brushless dual-feed motor in 1994, see Wallace Alan K, A Design Procedure For the Brushless Doubly-Fed MachineAdjustable Speed Drive.ICEM, 1994, power winding and control winding are arranged on this motor stator, regulate the energy Flow of controlling between winding and the AC network by energy converter, reach the purpose of regulating motor speed.This motor has only a mechanical port, and prime mover can not transfer energy directly to load.
The nineties in last century, the people such as Nordlund of Sweden KTH propose a kind of double-mechanical-port motor, published thesis in 2005, see E.Nordlund, The Four-Quadrant TransducerSystem for Hybrid Electric Vehicles.Doctor ' s thesis, Royal Institute ofTechnology, Stockholm, May, 2005, ISBN 91-7178-057-2, ISSN 1650-674X.This motor has two rotors, a rotor (internal rotor) links with prime mover, another rotor (external rotor) links with load, prime mover can directly transmit mechanical energy to load, regulate the energy Flow between motor internal rotor and the stator, can regulate motor speed, this motor power changes versatile and flexible, and the capacity of electrical energy transformer also can reach the total capacity of system usually, reduced the cost of electrical energy transformer.But this motor internal rotor winding need be by collector ring and brush projected current, causes that the motor operational efficiency descends, reliability reduces and often need drawback such as safeguard to parts such as brushes.
Chinese patent ZL 200720087223.1 has announced a kind of brushless dual-mechanical port motor, and this technical scheme proposes to have on a kind of internal rotor two cover windings, and a cover permanent magnet is respectively posted in the interior outside on the external rotor, and the structures of two cover windings are arranged on the stator.From electrical principle, this structure is equivalent to the combination of a magneto alternator, a permanent magnet synchronous motor and a wire-wound asynchronous motor.This structure can solve a series of problems that caused by collector ring and brush on principle, but it uses winding quantity many, and winding utilization is low, and motor volume is bigger.
The utility model content
The purpose of this utility model is to provide a kind of brushless double feed double-mechanical-port motor, has improved winding utilization, has reduced the volume of motor.
The technical solution of the utility model is:
A kind of brushless double feed double-mechanical-port motor of radial magnetic field, form by mechanical part and electric part, mechanical part comprises internal rotor 1, external rotor 2 and stator 3 from inside to outside successively, electric part comprises stator winding, external rotor winding and AC-DC-AC electrical energy transformer 4, and described internal rotor outer surface is equipped with a cover permanent magnet 9; Described stator winding comprises stator power winding 10 and stator control winding 6;
Described external rotor winding comprises independent external rotor control winding 8 and the compound winding 7 of external rotor, each phase winding of the compound winding 7 of described external rotor is made of at least one coil series connection, each coil is made of two conductor parallel connections, each phase winding port links to each other with independent external rotor control winding negative-phase sequence, when motor moved, the compound winding 7 of external rotor externally showed two kinds of numbers of pole-pairs simultaneously, and the magnetic field of two kinds of numbers of poles is mutually orthogonal, be independent of each other, independent fully on electric;
Independent external rotor control winding 8 is corresponding with internal rotor permanent-magnetic body 9, and the magnetic field between them intercouples; The compound winding 7 of external rotor is corresponding with stator control winding 6 on the one hand, and the magnetic field between them intercouples; Corresponding with stator power winding 10 on the other hand, the magnetic field between them intercouples;
Stator power winding 10 is connected by the AC-DC-AC electrical energy transformer with stator control winding 6.
Described AC-DC-AC electrical energy transformer comprises rectifier and inverter, and rectifier AC side and stator control winding are electrically connected, and inverter AC side and stator power winding are electrically connected, and the DC side of rectifier and inverter is electrically connected mutually.
As improvement of the present utility model, parallel connection direct power supply between described rectifier and the inverter, DC power supply is a kind of in storage battery, super capacitor and the direct current network.
Technique effect of the present utility model is presented as:
(1) the utility model is affixed on the internal rotor outer surface with permanent magnet, and has only a cover, and two cover windings are arranged on the external rotor, and the motor-field design on same axial coordinate, has been reduced the axial length of motor, has reduced the volume that motor shaft makes progress.
(2) this new structure has adopted the multiplexing technology of a kind of winding, promptly realizes that by specific connection two cover functions are different, the electric function that disjunct winding by a cover winding, has improved winding utilization, is also reducing motor volume in the radial direction.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model electrical schematic diagram;
Fig. 3 is the compound winding connection method schematic diagram of the utility model external rotor.
Embodiment
As Fig. 1, shown in Figure 2, the utility model is made up of mechanical part and electric part, mechanical part comprises from inside to outside internal rotor 1, external rotor 2 and the stator 3 of installing successively, the outer surface of internal rotor mounts permanent magnet 9, and external rotor 2 and internal rotor 1 and stator 3 are rotationally connected by bearing, and internal rotor 1 and external rotor 2 and stator 3 are rotationally connected by bearing, inner rotor shaft links to each other with internal combustion engine, imports as power; Outer rotor shaft links to each other with mechanical load, exports as power;
Electric part comprises stator winding, external rotor winding and electrical energy transformer, and described stator winding comprises stator power winding 10 and stator control winding 6; Described external rotor winding comprises first external rotor control winding, 8, the second rotors control winding 7-1 and external rotor power winding 7-2.
By the winding multiplex technique, the function that second external rotor is controlled winding 7-1 and external rotor power winding 7-2 adopts a cover winding 7 to realize, and satisfies second external rotor control winding and the electric disjunct requirement of external rotor power winding.Therefore,, first external rotor control winding 8 can be called independent external rotor control winding 8, second rotor control winding 7-1 is called non-independence second rotor control winding 7-1 from the winding operating position.The technology that described winding is multiplexing is seen Wang Xuefan, utilizes tandem to connect the pole-changing starting wound-rotor induction motor of speed control principle, Proceedings of the CSEE, Vol.24, No.5, May 2004, concrete connection as shown in Figure 3, the compound winding 7 of external rotor comprises A, B, C phase winding, every phase winding is made of at least one coil series connection, each coil is made of two conductor parallel connections again, A wherein, B, C phase port links to each other with independent external rotor control winding 8 negative-phase sequences.The quantity of coil is determined according to required motor field pole logarithm.For p to the winding motor of the utmost point and q squirrel cage motor to the utmost point, A, B, C port feed p utmost point induced current, stator power winding induces q utmost point induced current in this external rotor winding.For two conductors in each coil, p utmost point induced current concurrent mistake, and q utmost point induced current reverse flow mistake, promptly q utmost point induced current forms circulation in each coil minor loop.Use this winding connection method, under motor ruuning situation, a cover winding can simultaneously externally show two kinds of numbers of pole-pairs, and the magnetic field of two kinds of numbers of poles is mutually orthogonal, is independent of each other, and is independent fully on electric.Promptly realized the function of two cover windings, used this kind connection can improve winding utilization with a cover winding.
Two cover windings of stator 3 are connected by AC-DC-AC electrical energy transformer 4, the direct inner counter phase sequence series connection of external rotor two cover control windings.
Internal rotor permanent-magnetic body 9 is corresponding with independent external rotor control winding 8, and the magnetic field between them intercouples, and forms a magneto alternator; Non-independent external rotor control winding 7-1 is corresponding with stator control winding 6, and the magnetic field between them intercouples, and forms a wire-wound asynchronous motor; Non-independent external rotor power winding 7-2 is corresponding with stator power winding 10, and the magnetic field between them intercouples, and forms a squirrel cage asynchronous motor; Rotation drives the magneto alternator generating to internal combustion engine as prime mover, because in most times of electric automobile operation, internal rotor 1 rotating speed is higher than external rotor 2 rotating speeds, so only some energy is directly passed to external rotor and is used to drag load rotation, its complementary energy can be stored in the DC power supply 5 by rectifier 4-1 by independent external rotor control winding 8 and interacting of winding 6 of stator control.When load torque increases, can from DC power supply 5, take out energy, supply with squirrel-cage motor by inverter 4-2, additional torque is provided, thus the total torque of making and load torque balance.
AC-DC-AC electrical energy transformer 4 comprises rectifier 4-1 and inverter 4-2, and rectifier 4-1 AC side and stator control winding 6 are electrically connected, and inverter 4-2 AC side and stator power winding 10 are electrically connected, and the DC side of rectifier and inverter is electrically connected mutually.
Can parallel connection direct power supply 5 between rectifier 4-1 and the inverter 4-2, adjust the imbalance between the motor input and output mechanical output.
For mixed power electric car, internal combustion engine often frequently changes the working point because being subjected to the influence of load behavior, but most of working point is not again the high efficiency point of internal combustion engine, so cause the efficiency of internal combustion engine low, energy loss is serious, but adopt brushless dual-mechanical port motor as drive system, internal combustion engine can be operated in a fixing working point, and the operating mode of load can be regulated arbitrarily, thereby make and do not have direct mechanically contact between the input and output, internal combustion engine can long-term work at the efficiency operation point, thereby improve fuel availability, reduce the wastage.And, input power and power output not necessarily to be equated at electrical energy transformer intermediate dc link adding storage battery.Remedy input with the difference power between the output by storage battery, the power of internal combustion engine also can not need change fast with load behavior, thereby internal combustion engine works in efficient district all the time under the situation of the frequent change of proof load operating mode effectively.

Claims (3)

1. the brushless double feed double-mechanical-port motor of a radial magnetic field, form by mechanical part and electric part, mechanical part comprises internal rotor (1), external rotor (2) and stator (3) from inside to outside successively, electric part comprises stator winding, external rotor winding and AC-DC-AC electrical energy transformer (4), it is characterized in that:
Described internal rotor outer surface is equipped with a cover permanent magnet (9);
Described stator winding comprises stator power winding (10) and stator control winding (6);
Described external rotor winding comprises independent external rotor control winding (8) and the compound winding of external rotor (7), the compound winding of external rotor (7) is a three-phase Symmetric Y type winding, its each phase winding is made of one or the series connection of above coil, each coil is made of two conductor parallel connections, each phase winding port links to each other with described independent external rotor control winding negative-phase sequence, when motor moves, the compound winding of external rotor (7) externally shows two kinds of numbers of pole-pairs simultaneously, the magnetic field of two kinds of numbers of poles is mutually orthogonal, be independent of each other, independent fully on electric;
Independent external rotor control winding (8) is corresponding with internal rotor permanent-magnetic body (9), and the magnetic field between them intercouples; The compound winding of external rotor (7) is corresponding with stator control winding (6) on the one hand, and the magnetic field between them intercouples; Corresponding with stator power winding (10) on the other hand, the magnetic field between them intercouples;
Stator power winding (10) is connected by the AC-DC-AC electrical energy transformer with stator control winding (6).
2. the brushless double feed double-mechanical-port motor of a kind of radial magnetic field as claimed in claim 1, it is characterized in that: described AC-DC-AC electrical energy transformer (4) comprises rectifier and inverter, rectifier AC side and stator control winding (6) are electrically connected, inverter AC side and stator power winding (10) are electrically connected, and the DC side of rectifier and inverter is electrically connected mutually.
3. the brushless double feed double-mechanical-port motor of a kind of radial magnetic field as claimed in claim 2 is characterized in that: parallel connection direct power supply between described rectifier and the inverter, described DC power supply are a kind of in storage battery, super capacitor and the direct current network.
CNU2008201935745U 2008-12-09 2008-12-09 A radial magnetic-field brushless doubly-fed double-mechanical-port motor CN201323515Y (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101951088A (en) * 2010-09-07 2011-01-19 哈尔滨工业大学 Radial-shaft radial magnetic field modulated brushless composite structure motor
CN103219842A (en) * 2013-04-28 2013-07-24 哈尔滨工业大学 Double-mechanical port electromechanical energy converter
CN106451970A (en) * 2016-09-26 2017-02-22 东南大学 Four-electrical port brushless double-fed motor with reluctance rotor and double stators
CN106487179A (en) * 2016-11-07 2017-03-08 东南大学 Dual-stator brushless double-fed wind power generator is modulated in a kind of field
CN106505815A (en) * 2016-10-31 2017-03-15 广东威灵电机制造有限公司 Motor
CN106961207A (en) * 2016-01-12 2017-07-18 亓英军 Electromagnetic speed variator
CN110017250A (en) * 2019-03-29 2019-07-16 华中科技大学 A kind of variable-speed constant-frequency wind power generation system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101951088A (en) * 2010-09-07 2011-01-19 哈尔滨工业大学 Radial-shaft radial magnetic field modulated brushless composite structure motor
CN101951088B (en) * 2010-09-07 2011-11-23 哈尔滨工业大学 Radial-shaft radial magnetic field modulated brushless composite structure motor
CN103219842A (en) * 2013-04-28 2013-07-24 哈尔滨工业大学 Double-mechanical port electromechanical energy converter
CN103219842B (en) * 2013-04-28 2015-08-19 哈尔滨工业大学 Double-mechanical port electromechanical energy converter
CN106961207A (en) * 2016-01-12 2017-07-18 亓英军 Electromagnetic speed variator
CN106451970A (en) * 2016-09-26 2017-02-22 东南大学 Four-electrical port brushless double-fed motor with reluctance rotor and double stators
CN106451970B (en) * 2016-09-26 2018-08-21 东南大学 Four electrical port brushless dual-feed motor of reluctance rotor bimorph transducer
CN106505815A (en) * 2016-10-31 2017-03-15 广东威灵电机制造有限公司 Motor
CN106505815B (en) * 2016-10-31 2018-12-18 广东威灵电机制造有限公司 Motor
CN106487179A (en) * 2016-11-07 2017-03-08 东南大学 Dual-stator brushless double-fed wind power generator is modulated in a kind of field
CN110017250A (en) * 2019-03-29 2019-07-16 华中科技大学 A kind of variable-speed constant-frequency wind power generation system

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Granted publication date: 20091007

Termination date: 20121209