CN2891456Y - Internal feeding brushless variable speed AC motor - Google Patents
Internal feeding brushless variable speed AC motor Download PDFInfo
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- CN2891456Y CN2891456Y CNU2006200181597U CN200620018159U CN2891456Y CN 2891456 Y CN2891456 Y CN 2891456Y CN U2006200181597 U CNU2006200181597 U CN U2006200181597U CN 200620018159 U CN200620018159 U CN 200620018159U CN 2891456 Y CN2891456 Y CN 2891456Y
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Abstract
The utility model relates to an internal feeding brushless variable speed AC motor. The stator around the non-brush rotor comprises three independent groups of windings which are power windings, a control winding and a feedback winding, wherein a controller is used to connect the control winding and the feedback winding, to change the frequency, amplitude and phase of the control winding current, and control the rotation speed and the running state of the motor. The feedback winding is added in the utility model, thereby solving the problem of the power supply and energy feedback of the control winding from the inner portion of the motor. Only one power supply is needed in the motor, thereby the utility model not only is convenient for the user but also reduces the cost and volume because the feedback winding is equal to the sub-coils of the transformer and integrates with the power winding equal to the junior coils.
Description
Technical field
The utility model relates to a kind of alternating current machine, particularly relates to a kind of internal feed brushless ac buncher.
Background technology
Existing brushless double feed alternating current machine mainly contains two kinds of structural shapes.A kind of tandem formula brushless double feed alternating current machine of forming by two conventional wound type induction motors, the stator winding of two motors links to each other with power supply respectively, and rotor coaxial connects and two rotor windings connect with phase sequence or negative-phase sequence; Another kind is the single motor brushless double feed alternating current machine that grows up on above-mentioned tandem brushless double feed alternating current machine basis, embed the winding of the different numbers of poles of two covers on the electric machine stator iron, one applies mechanically rate of doing work winding, and another set of as the control winding, rotor then adopts the cage modle or the reluctance rotor structure of particular design.The common advantage of above-mentioned two kinds of motors, the one, brushless structure is reliable, and the 2nd, the more powerful buncher of the Frequency Converter Control of available smaller power.
Yet there is the common drawback that needs two cover power supplies in above-mentioned brushless electric machine.Because the power of stator two cover windings is different with voltage, particularly for large ac machines, the power winding need adopt the high voltage source power supply, and the control winding is generally the low-tension supply power supply, therefore above-mentioned brushless dual-feed motor need adopt two cover power supply power supplies of different electric pressures, as adopt a cover power supply then to need to be equipped with the transformer of a special use, not only can increase cost, and will use to the user and make troubles.
The utility model content
For remedying above-mentioned defective, the utility model provides a kind of simple in structure, internal feed brushless ac buncher of being easy to control.
Because the power winding has identical number of poles and winding construction with interior feedback winding, thus can directly carry out the electromagnetic coupled electric energy transmitting,
The utility model internal feed brushless ac buncher, form by stator, rotor, rotating shaft, bearing, end cap, cabinet parts, it is characterized in that described stator has 3 to overlap independently winding and be respectively power winding, control winding and interior feedback winding, described power winding is connected with power supply, described control winding and interior feedback winding are connected to each other by controller, described rotor (2) is no slip-ring brush structure, by frequency, amplitude and the phase place of the described control winding current of described controller (3) change, control rotating speed of motor and running status.
The utility model internal feed brushless ac buncher, described power winding has the identical number of poles 2p and the winding construction of same distribution and chording factor with interior feedback winding, described control winding has the 2q utmost point, the number of poles of described power winding and control winding can not equate that its pass is: 2p＞2q+2.
The utility model internal feed brushless ac buncher, described rotor adopts the cage-type rotor with concentric type short-circuited winding, the perhaps reluctance rotor of salient-pole structure, the perhaps axial reluctance rotor of lamination, the perhaps mixed rotor structure that combines with reluctance rotor of cage-type rotor, described rotor equivalent number of poles must equal the number of poles sum of described stator power winding and control winding, i.e. 2p+2q.
The utility model internal feed brushless ac buncher, described controller is the stationary power converting means that is made of electronic power switch device and control circuit thereof, form by two two way convertors (4,5) and control unit (6), two two way convertors (4,5) are interconnected, and control unit (6) connects two way convertor (4,5) respectively.
In the utility model internal feed brushless ac buncher, the control winding is different with the number of poles and the winding construction of power winding, can not directly carry out electromagnetic coupled and power transfer between two windings, need can realize the energy converting between mechanical of motor by the magnetic field modulation effect of rotor to power winding and control winding.The effect of power winding is an electric energy transmitting, and when being used as the motor operation, motor is converted into mechanical energy by power winding input electric energy and is exported by rotating shaft; When being used as generator operation, motor is converted into electric energy with mechanical energy, then by the output of power winding.The effect of control winding is the running status and the parameter of control motor, as rotating speed of motor and operational mode (asynchronous, synchronous or doubly-fed adjustable speed operation).The effect of interior feedback winding is that the electric energy that perhaps will control winding output feeds back to the power winding for the control winding provides power supply.The effect of controller is the bi-directional conversion that realizes control winding and two kinds of different frequency electric energy of interior feedback winding, for the control winding provides needed voltage and current.
The beneficial effects of the utility model are: according to the brushless electric machine operation logic, when doing the operation of metasynchronism (being lower than same leg speed) motor, the power flow direction of control winding is outwards to export electric energy; And do supersynchronous (being higher than same leg speed) motor when operation, need be to control winding input electric energy.By feedback winding in increasing, solved the power supply and the energy feedback problem of control winding dexterously from motor internal.When needs were imported exciting current from controlling winding, interior feedback winding was equivalent to a step-down transformer, after the step-down of power winding input voltage, for the control winding provides power supply; And the control winding need be when the power supply feedback electric energy, interior feedback winding is equivalent to a step-up transformer, the voltage that control winding output via controller is carried out after the frequency translation boosts, feed back to the power winding then, make electric energy obtain recycling, thereby reduced by the electric energy of power winding from power supply input motor.Motor only needs a power supply, not only provide users with the convenient, and because interior feedback winding is equivalent to the secondary coil of transformer, integrate with power winding as primary coil, with compare by power transformer power supply is set separately outside motor, can reduce cost and reduce volume.
Description of drawings
Fig. 1 is the utility model internal feed brushless ac buncher structural representation;
Fig. 2 is the utility model internal feed brushless ac buncher stator winding structure schematic diagram;
Fig. 3 is a kind of rotor structure schematic diagram of the utility model internal feed brushless ac buncher;
Fig. 4 is the another kind of rotor structure schematic diagram of the utility model internal feed brushless ac buncher;
Fig. 5 is the third rotor structure schematic diagram of the utility model internal feed brushless ac buncher;
Fig. 6 is the utility model internal feed brushless ac speed-regulating motor controller theory diagram.
Embodiment
Embodiment
Below in conjunction with accompanying drawing the utility model internal feed brushless ac buncher is described in further details.
Fig. 1 is the utility model internal feed brushless ac buncher structural representation, and wherein 1 is motor stator, and 2 is rotor, and 3 is controller, and 4 is power supply.Placed 3 in the core slots in motor stator 1 and overlapped independently symmetric winding, be respectively outlet terminal A among Fig. 1
1, B
1, C
1The power winding of expression is used A
2, B
2, C
2The expression the control winding and use A
3, B
3, C
3The interior feedback winding of expression.The annexation of winding is: the outlet terminal A of power winding
1, B
1, C
1Be connected with power supply 4; The outlet terminal A of control winding
2, B
2, C
2By controller 3, with the outlet terminal A of interior feedback winding
3, B
3, C
3Be connected.
Fig. 2 is the utility model internal feed brushless ac buncher stator winding structure schematic diagram.The power winding has identical number of poles (the 2p utmost point) and identical winding construction (identical distribution and chording factor) with interior feedback winding, and the control winding has the 2q utmost point, and the number of poles of power winding and control winding can not equate, and need satisfy following relation: 2p＞2q+2.The power winding has identical number of poles and winding construction with interior feedback winding, is number of turn difference only, is equivalent to a transformer, can directly carry out the exchange of electromagnetic coupled and electric energy; And have between the control winding and power winding of different numbers of poles and winding construction, then can not directly carry out electromagnetic coupled and power transfer, need magnetic field modulation effect by rotor, can realize the energy converting between mechanical of motor.The effect of power winding is an electric energy transmitting, and the effect of control winding is the running status and the parameter of control motor, and the effect of interior feedback winding is to provide power supply and energy feedback path for the control winding.
The reluctance rotor of rotor 2 usefulness salient-pole structures is represented among Fig. 1 and Fig. 2, is a kind of signal, in fact is not limited to this kind rotor structure mode.Fig. 4 Fig. 5 Fig. 6 is the utility model internal feed brushless ac buncher different rotor structure schematic diagram, and wherein Fig. 4 is the rotor with concentric type short-circuited winding, and Fig. 5 is the reluctance rotor with salient-pole structure, and Fig. 6 is for adopting the reluctance rotor of axial lamination.The effect of rotor is that the magnetic field that the stator winding electric current with different numbers of poles produces is modulated, and produces needed rotating magnetic field and realizes energy converting between mechanical.No matter adopt the rotor of which kind of structure, its equivalent number of poles must equal the number of poles sum of stator power winding and control winding, i.e. 2p+2q.
Controller 3 is the stationary power converting means that are made of electronic power switch device and control circuit thereof, can realize the two-way changing of AC-DC-alternating voltage and frequency.The voltage of the fixed frequency that interior feedback winding can be provided is converted to the needed frequency of control winding, amplitude and the adjustable alternating voltage of phase place; The voltage transitions of frequency, amplitude and the phase change that also the control winding can be exported is the voltage of fixed frequency simultaneously, to realize the energy feedback by interior feedback winding.
The theory diagram of controller is made up of two way convertor 4,5 and control unit 6 as shown in Figure 6.Do motor operation and be operated in synchronous speed when following when motor, two way convertor 4 changes Electric Machine Control winding output voltage into direct current with the frequency alternating current relevant with motor speed as rectifier; And two way convertor 5 changes 4 direct currents of exporting and the identical alternating current of power of motor winding frequency of supply as inverter, and the electric energy that will control winding output by interior feedback winding feeds back to the power winding.When motor speed is higher than with leg speed, need be to control winding input electric energy, this moment, two way convertor 4 and 5 function exchanged, two way convertor 5 as rectifier and two way convertor 4 as inverter, two way convertor 5 is converted to direct current with the alternating current that interior feedback winding provides, and supplies with the control winding by inverter 4 and then the alternating current that is converted to required frequency, amplitude and phase place then.When motor when the generator, two way convertor 4 and 5 power flow direction are just opposite with above-mentioned motor operational mode.The function of control unit 6 is, different running status power flow directions and the requirement of controlling winding power supply or output AC voltage according to motor, control the mode of operation and the Power Conversion characteristic of two way convertor 4 and 5, control unit adopts microprocessor to make kernel control chip, has more accurate ground control ability, but control unit be not only this scheme can not, also can adopt the control unit of other existing double-fed brushless electric machine.。
According to the brushless electric machine operation logic, when doing the operation of metasynchronism (being lower than same leg speed) motor, the power flow direction of control winding is outwards to export electric energy; And do supersynchronous (being higher than same leg speed) motor when operation, need be to control winding input electric energy.By feedback winding in increasing, solved the power supply and the energy feedback problem of control winding dexterously from motor internal.When needs were imported exciting current from controlling winding, interior feedback winding was equivalent to a step-down transformer, after the step-down of power winding input voltage, for the control winding provides power supply; And the control winding need be when the power supply feedback electric energy, interior feedback winding is equivalent to a step-up transformer, the voltage that control winding output via controller is carried out after the frequency translation boosts, feed back to the power winding then, make electric energy obtain recycling, thereby reduced by the electric energy of power winding from power supply input motor.
The utility model internal feed brushless ac buncher only needs a power supply, not only provide users with the convenient, and because interior feedback winding is equivalent to the secondary coil of transformer, integrate with power winding as primary coil, with compare by power transformer power supply is set separately outside motor, can reduce cost and reduce volume.
Claims (4)
1, a kind of Inner feedback formula brushless ac buncher, form by stator, rotor, rotating shaft, bearing, end cap, cabinet parts, it is characterized in that described stator (1) has 3 to overlap independently winding and be respectively power winding, control winding and interior feedback winding, described power winding is connected with power supply, described control winding and interior feedback winding are connected to each other by controller, described rotor (2) is no slip-ring brush structure, by frequency, amplitude and the phase place of the described control winding current of described controller (3) change, control rotating speed of motor and running status.
2, Inner feedback formula brushless ac buncher according to claim 1, it is characterized in that described power winding and interior feedback winding have the identical number of poles 2p and the winding construction of same distribution and chording factor, described control winding has the 2q utmost point, the number of poles of described power winding and control winding can not equate that its pass is: 2p＞2q+2.
3, Inner feedback formula brushless ac buncher according to claim 2, it is characterized in that described rotor adopts the cage-type rotor with concentric type short-circuited winding, the perhaps reluctance rotor of salient-pole structure, the perhaps axial reluctance rotor of lamination, the perhaps mixed rotor structure that combines with reluctance rotor of cage-type rotor, described rotor equivalent number of poles must equal the number of poles sum of described stator power winding and control winding, i.e. 2p+2q.
4, Inner feedback formula brushless ac buncher according to claim 3, it is characterized in that described controller is the stationary power converting means that is made of electronic power switch device and control circuit thereof, form by two two way convertors (4,5) and control unit (6), two two way convertors (4,5) are interconnected, and control unit (6) connects two way convertor (4,5) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200181597U CN2891456Y (en) | 2006-03-21 | 2006-03-21 | Internal feeding brushless variable speed AC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200181597U CN2891456Y (en) | 2006-03-21 | 2006-03-21 | Internal feeding brushless variable speed AC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2891456Y true CN2891456Y (en) | 2007-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200181597U Expired - Fee Related CN2891456Y (en) | 2006-03-21 | 2006-03-21 | Internal feeding brushless variable speed AC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2891456Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181470A (en) * | 2020-03-06 | 2020-05-19 | 淄博高新区华科大高效节能电机技术研发中心 | Harmonic suppression method for brushless double-fed motor |
-
2006
- 2006-03-21 CN CNU2006200181597U patent/CN2891456Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181470A (en) * | 2020-03-06 | 2020-05-19 | 淄博高新区华科大高效节能电机技术研发中心 | Harmonic suppression method for brushless double-fed motor |
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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: 20070418 Termination date: 20140321 |