CN2770217Y - Permanent-magnet brushless DC machine - Google Patents
Permanent-magnet brushless DC machine Download PDFInfo
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- CN2770217Y CN2770217Y CN 200520095349 CN200520095349U CN2770217Y CN 2770217 Y CN2770217 Y CN 2770217Y CN 200520095349 CN200520095349 CN 200520095349 CN 200520095349 U CN200520095349 U CN 200520095349U CN 2770217 Y CN2770217 Y CN 2770217Y
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Abstract
The utility model relates to a permanent magnet brushless DC motor. Magnetic poles of a stator and a rotor of the motor all adopt a double-side salient pole symmetrical geometric structure, the number of grooves of stator windings is the number of the poles of the rotor plus two or four and the two salient poles which are symmetrical with the stator are provided with concentrated excitation windings which are mutually connected in series to form a phase. The rotor is composed of a rotating shaft, a soft magnet core, a permanent magnet and a sleeving ring, wherein the permanent magnet is arranged on the surface of the soft magnet core of the rotor to form the magnetic poles which can rotate in a synchronous mode, and opposite angles form cylindrical rotors by the way that the outer circle point of the permanent magnet uses the no-magnetism sleeving ring and adopts an interference matching method. The motor has the advantages of simple structure, tightness and high reliability. The utility model has high efficiency in a wide rotational speed and power range, the loss is low, the soft starting and the four-quadrant operation can be realized, and the utility model has stronger regeneration automatic capability. The motor is suitable for electrified devices in industry and agriculture, war production, particularly automobile driving devices, household appliance products, etc.
Description
Technical field:
Technical field under the utility model is an electrical engineering, and a kind of novel permanent magnetic brshless DC motor is provided.
Background technology:
DC motor is widely used with its good governor control characteristics.Shortcomings such as but DC motor is owing to need the mechanical switching device, and poor reliability needs often to safeguard, produces electromagnetic interference during commutation, and noise is big and should influence its further application.Along with power electronic technology and computer-controlled development, the brushless, permanently excited direct current motor that replaces mechanical switching with the electronics commutation arises at the historic moment.Compare with other motor, the maximum characteristics of brushless DC motor are to have substituted the mechanical switching device of being made up of brush and commutator by in the brush DC motor with the switch converters that rotor-position signal is controlled, make good speed governing of its existing DC motor and control characteristic, there is ac motor structure simple again, reliable, advantage such as easy to maintenance.Brushless, permanently excited direct current motor does not need excitation winding owing to adopt permanent-magnet steel, can dwindle motor volume, reduces loss, improves electric efficiency.China's rare earth resources is abundant, and researching and developing magneto energetically is one of direction of electromechanics trade development.Also be that development and production electric automobile key technology merit is closed direction.
Summary of the invention:
The purpose of this utility model provides a kind of novel permanent magnetic brshless DC motor.
The technical solution of the utility model is: a kind of novel permanent magnetic brshless DC motor, form by motor body and controller, it is characterized in that the stator of this motor and the symmetric geometry that rotor magnetic pole all adopts bilateral salient pole, stator winding groove number is that the number of poles of rotor adds 2 or 4; Stator becomes with punching silicon-steel; On symmetrical two of stator are protruding, the central excitation winding is installed and connects mutually, constitute a phase; Described rotor is made up of rotating shaft, soft magnetism iron core, permanent magnet and the collar; Rotor magnetic pole adopts high-performance rare-earth permanent magnet material to make, and magnetic structure is a radial; The soft magnetism that permanent magnet is installed in rotor is fixed on corresponding position tightly with the structure member of rotors such as permanent magnet, soft magnetism iron core and rotating shaft, constitutes cylindrical rotor.The flux concentration of this motor is come excitation in pole region by stator current, and each magnetic resistance of organizing magnetic circuit is that the difference with rotor-position changes, and the rotation of rotor is to rely on magnetic pull to move.
Position sensorless commutation control method based on the price reduction state observer, not to detect winding back emf or third harmonic voltage merely, but comprehensively motor voltage in three phases, electric current calculate the reckoning rotor-position, stronger than conventional method applicability, calculate more stablely, accurate, can obtain higher speed ratio.Adopt the scheme of multi-channel parallel work, even at this moment one and branch road break down, but motor long time continuous working still has very high fault-tolerance.Stator core adopts 0.27 punching out of cold bundle orientation silicon steel sheet thickness to form that eddy current is little, iron loss is little, change poles is fast.The groove area utilance height of this structural electromotor, end winding is short, thereby can save and use copper, reduces copper loss, raises the efficiency.Enamelled wire adopts anti-electric sunshine, and is waterproof explosion-proof.The motor-driven major loop, based on high power intelligent IGPT module---IPM has kinds of protect functions such as overvoltage/overcurrent/overtemperature, the gate-drive optimum, high efficiency, highly reliable, low temperature rise; The control of applied current feedback closed loop, the direct controlling torque of the system of both being convenient to obtains the optimal dynamic performance, is convenient to bring into play the main circuit current capacity again and is no more than tolerance limit; Adopt the wide modulation technique of unipolar pulse, be easy to make armature supply smoothly continuous, and improved main circuit efficient.
Novel permanent magnetic direct current machine provided by the utility model has following characteristics:
1. electric machine structure novelty, rotor only has the magnetic pole that permanent-magnet steel is housed, and every pair of stator every phase extremely down only has a concentrating coil, strides around a tooth, and each end winding does not overlap mutually.It is little to have volume, and structure and technology are simple, the remarkable advantage that reliable operation is easy to maintenance;
2. the groove area utilance height of this structural electromotor, end winding is short, thereby can save and use copper, reduces uranium and consumes, and raises the efficiency;
3. if adopt the scheme of multi-channel parallel work, even at this moment a parallel branch breaks down, but motor long time continuous working still has very high fault-tolerance;
4. motor-driven major loop, based on high power intelligent IGPT module---IPM has kinds of protect functions such as overvoltage/overcurrent/overtemperature, the gate-drive optimum, high efficiency, highly reliable, low temperature rise; The control of applied current feedback closed loop, the direct controlling torque of the system of both being convenient to obtains the optimal dynamic performance, is convenient to bring into play the main circuit current capacity again and is no more than tolerance limit; Adopt the wide modulation technique of unipolar pulse, be easy to make armature supply smoothly continuous, and improved main circuit efficient;
5. based on the position sensorless commutation control method of depression of order state observation, not to detect winding back emf or third harmonic voltage merely, but comprehensively motor voltage in three phases, electric current calculate the reckoning rotor-position, stronger than conventional method applicability, calculate more stablely, accurate, can obtain higher speed ratio;
6. moving system has the four quadrant running ability, has controlled intelligent generating capacity, can have the boost charge ability according to the charge characteristic that adapts to different chemical energy-storage units (as lead acid accumulator, nickel-hydrogen accumulator, lithium-ions battery etc.) is set;
7. based on the intelligent self-adapting intelligence control method of Electric Machine Control special digital signal processing, have the on-line parameter identification capability, online fault self-checking is surveyed ability, adopts the wide temperature range design, uses " three is anti-" technology, and systematicness is good, the reliability height.
This is fit to be applied to farm electrification equipment motor, aspect and fields such as especially automotive proplsion, and household appliances.
Description of drawings:
Fig. 1 is the basic structure schematic diagram of this permanent-magnet brushless DC electric machine.
Fig. 2 is the winding construction schematic diagram of the disclosed a kind of pair of three-phase 12/8 pole permanent magnet brushless direct current machine of the utility model.
That this motor of Fig. 3 adopts is two three-phase star connection, Y connection full bridge driving circuit figure.
Embodiment:
As illustrated in fig. 1 and 2, this motor stator winding adopts concentrates whole distance single around structure, adopts Y type connecting method, constitutes the double three-phase permanent-magnetic brshless DC motor.This winding construction is actually the three-phase 6/8 pole brushless DC electric machine structure of two parallel connections, and number of stator slots is 6 grooves along the even cloth of circle, and even 6 mid-sales windings of cloth constitute three-phase, and rotor magnetic pole is 8 grades.
The operation principle of the utility model motor is that the normal operation of permanent-magnet brushless DC electric machine is to switch on to the commutation constantly of each phase winding of the armature on the stator by electronic commutator, so that stator field is along with the position of rotor is constantly changing, make stator field and rotor magnetic magnetic field wide, produce electromagnetic torque and promote the rotor rotation in the electric angle that the locus remains about 90 °.
The control strategy of the utility model motor adopts the control of the permanent-magnet brushless DC electric machine of square wave current (in fact square wave is that top width is not less than 120 ° of square waves).The electronic commutation scheme is adopted two all type of drive of three-phase star connection, Y connection.Two three-phase star connection, Y connection full bridge driving circuits as shown in Figure 3.Among the figure, switching tube A, B, C and X, Y, Z are P channel mosfet power tubes, conducting during low level; Switching tube A, B, C are N-channel MOS FET power tubes, conducting during high level.By 3 outputs of back-emf signal are turn-on and turn-off of controlling these switching tubes by logical circuit, and its control mode has two kinds: two or two conduction modes and three or three conduction modes.What present embodiment adopted is two or two conduction modes.
Two or two conduction modes are to make the conducting simultaneously of 2 switching tubes at every turn.According to the switching tube naming relationship of Fig. 3, the conducting of ABC threephase switch pipe is in proper order: A → C, A → B, C → B, C → A, B → A, B → C.Have 6 kinds of conducting states, change a next state every 60 ° and change a switching tube, 120 ° of each switching tube conductings.When the AC conducting, the route of electric current is: power supply → A phase winding → C phase winding C → ground.After rotor turns over 15 ° of angles, the control signal that anti-motor is sent here is ended A → C, A, B begin conducting, and the route of electric current becomes: power supply → A phase winding → C phase winding → C phase winding B begins conducting, and the route of electric current becomes: power supply → A → B phase winding → C phase winding → C → ground.According to this rule, whenever change conducting state one time, the direction vector of synthetic electromagnetic torque just turns over 15 ° of angles.Six conducting state correspondences 6 synthetic electromagnetic torques, they big or small identical.
Similarly, the conducting of abc threephase switch pipe is in proper order: Y → Z, X → Z, X → Y, Z → Y, Z → X, Y → X.6 kinds of conducting states are equally also arranged, and also are to change a conducting state every 60 °, and every change one next state is changed a switching tube, 120 ° of each switching tube conductings.The route rule of the electric current during conducting and the direction vector of synthetic electromagnetic torque all identical.
It should be noted that when two three-phases move simultaneously the electric current magnetomotive force between ABC three-phase and the abc three-phase and the magnetomotive force of permanent magnetism magnetic pole differ 7.5 ° of electrical degrees in the locus.These characteristics mean that the synthetic torque of two three-phase operation modes has increased, and the waveform of output torque becomes more level and smooth, and the fluctuation of torque reduces greatly.
Claims (1)
1. novel permanent magnetic brshless DC motor is made up of motor body and control, and the stator employing punching silicon-steel that it is characterized in that this motor laminates to be made; On symmetrical two of stator are protruding, the central excitation winding is installed and connects mutually, constitute a phase; Described rotor is made up of rotating shaft, soft magnetism iron core, permanent magnet and the collar; Rotor magnetic pole adopts high-performance rare-earth permanent magnet material to make, and magnetic structure is a radial; Permanent magnet is installed in the soft magnetism surface unshakable in one's determination of rotor, the magnetic pole that formation can be rotated synchronously; Utilize the nonmagnetic collar to adopt the interference fit method at permanent magnet cylindrical place, the structure member of rotors such as permanent magnet, soft magnetism iron core and rotating shaft is fixed on corresponding position tightly, constitute cylindrical rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520095349 CN2770217Y (en) | 2005-02-25 | 2005-02-25 | Permanent-magnet brushless DC machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520095349 CN2770217Y (en) | 2005-02-25 | 2005-02-25 | Permanent-magnet brushless DC machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2770217Y true CN2770217Y (en) | 2006-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520095349 Expired - Fee Related CN2770217Y (en) | 2005-02-25 | 2005-02-25 | Permanent-magnet brushless DC machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2770217Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997459A (en) * | 2010-12-01 | 2011-03-30 | 赵龙升 | DC oil pump motor soft start control device |
| CN1933286B (en) * | 2006-08-29 | 2012-05-23 | 林祥钟 | Permanent magnetic brushless DC four-quadrant electric machine |
| CN104753300A (en) * | 2015-02-25 | 2015-07-01 | 中国人民解放军海军工程大学 | Permanent magnet BLDC (Brushless Direct Current Motor) of ring winding |
| CN106817002A (en) * | 2015-11-30 | 2017-06-09 | 张黎强 | A kind of switched reluctance machines |
-
2005
- 2005-02-25 CN CN 200520095349 patent/CN2770217Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1933286B (en) * | 2006-08-29 | 2012-05-23 | 林祥钟 | Permanent magnetic brushless DC four-quadrant electric machine |
| CN101997459A (en) * | 2010-12-01 | 2011-03-30 | 赵龙升 | DC oil pump motor soft start control device |
| CN101997459B (en) * | 2010-12-01 | 2012-09-12 | 赵龙升 | DC oil pump motor soft start control device |
| CN104753300A (en) * | 2015-02-25 | 2015-07-01 | 中国人民解放军海军工程大学 | Permanent magnet BLDC (Brushless Direct Current Motor) of ring winding |
| CN106817002A (en) * | 2015-11-30 | 2017-06-09 | 张黎强 | A kind of switched reluctance machines |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060405 Termination date: 20130225 |