CN117375282A - Winding arrangement structure of three-phase-to-three-phase radio excitation brushless synchronous motor - Google Patents
Winding arrangement structure of three-phase-to-three-phase radio excitation brushless synchronous motor Download PDFInfo
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- CN117375282A CN117375282A CN202311261171.5A CN202311261171A CN117375282A CN 117375282 A CN117375282 A CN 117375282A CN 202311261171 A CN202311261171 A CN 202311261171A CN 117375282 A CN117375282 A CN 117375282A
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- 238000004804 winding Methods 0.000 title claims abstract description 131
- 230000005284 excitation Effects 0.000 title claims abstract description 72
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 23
- 230000006698 induction Effects 0.000 claims abstract description 47
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000000819 phase cycle Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 18
- 239000003990 capacitor Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/02—Synchronous motors
- H02K19/10—Synchronous motors for multi-phase current
- H02K19/12—Synchronous motors for multi-phase current characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
- H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention provides a three-phase-to-three-phase wireless radio excitation brushless synchronous motor winding arrangement structure, a stator winding is multiplexed with a transmitting end of a wireless excitation system, a rotor side is not additionally slotted, a wireless three-phase receiving induction winding and an excitation winding are placed in the same slot in a multi-layer manner, the three-phase induction winding wirelessly acquires excitation energy and then supplies power to the excitation winding through a rectifier, so that three-phase-to-three-phase wireless power transmission excitation is realized, and compared with three-phase-to-single-phase wireless excitation, the excitation voltage transmission size is improved to the following level under the condition that the power supply and the motor structure are basically unchangedThe output fluctuation is smaller, and the system integration level, the stability and the efficiency are higher.
Description
Technical Field
The invention relates to the technical field of excitation and wireless power transmission of an electrically excited synchronous motor, in particular to a winding arrangement structure of a three-phase-to-three-phase wireless excitation brushless synchronous motor. In particular to synchronous motor winding multiplexing design, synchronous motor excitation mode, rotary wireless power transmission and the like.
Background
In order to ensure that the direction of current in the exciting winding is unchanged, the traditional electric exciting synchronous motor needs to be timely commutated in the rotating process of the rotor through an electric brush, so that a rotating magnetic field is generated. The reliability of the system is reduced by using the electric brush, the mechanical abrasion of the electric brush is serious by using the electric brush for a long time, the electric brush needs to be replaced regularly, the cost is high, and the maintenance is inconvenient. In order to overcome this drawback, brushless synchronous motors are produced, which, although replacing brushes, increase the axial length of the motor and are bulky and have a long dynamic response time.
Existing brushless schemes are concentrated on a multistage exciter type, an induction rectification type, a harmonic type and the like, the system volume can be greatly increased when exciter excitation is added, and the induction type and the harmonic type brushless excitation are not high in magnetic field complexity, efficiency and power factor. Based on the above, the scholars propose that the resonance coupling wireless power transmission is used for brushless excitation of the synchronous motor, and the problems can be effectively solved. In the aspect of motor structure, the direct current output by the exciting generator is directly connected to the winding of the rotor, so that the actual current of the rotor is difficult to directly measure, the rotor current is often calculated according to relevant parameters such as the rotor voltage, and certain deviation exists. The running condition of the rotating diode, whether the wiring is broken, whether the fuse is blown, etc. are also inconvenient to monitor. Thus, operation and maintenance are extremely inconvenient. Meanwhile, the shafting is much longer than a self-shunt excitation exciter set, so that the construction cost of a factory building and the risks of set vibration and torsional vibration are increased; in the aspect of wireless, only three-phase to single-phase energy transfer can be realized, in order to transfer more energy, a mode of increasing frequency or primary side current is needed, and the defect is that the larger frequency increases the switching loss of a device, the internal resistance loss of a coil and the eddy current loss of a magnetic core, so that the temperature of a power device and the coil is increased, and the stability of a system is reduced; the increase of primary side current increases the internal resistance loss of the coil and the internal resistance loss of the resonant capacitor, the heating of the capacitor is serious, the system efficiency is low, and the problems of high resonant voltage level, large resonant circulation and the like of the compensation element can also occur.
Therefore, the invention provides a winding arrangement structure of a three-phase-to-three-phase radio excitation brushless synchronous motor, and aims to further improve the integration level and the power density of a brushless excitation system. The voltage output capability is improved under the same power supply condition when three-phase wireless excitation is compared with three-phase wireless excitation and single-phase wireless excitationThe output fluctuation is smaller and more stable, and the transmission distance is longer; in the motor structure level, the three phases are almost unchanged from the three phases to the single phase, the stator side winding is not changed, the rotor side induction winding is expanded into three phases from single-phase reception, but the exciting power to be transmitted is usually only 1% -2% of the output power, the volume of the induction winding is small, and the influence on the arrangement of the exciting winding is small.
Disclosure of Invention
The invention provides a winding arrangement structure of a three-phase-to-three-phase radio excitation brushless synchronous motor for solving the problems in the prior art. The stator winding is multiplexed with the transmitting end of the wireless excitation system, the rotor side is not additionally slotted, and the wireless three-phase receiving coil and the excitation winding are placed in the same slot in multiple layers, so that three-phase wireless power transmission is realized, and compared with three-phase single-phase wireless excitation, the output size of excitation voltage is improved under the condition that the structures of a power supply and a motor are basically unchangedMultiple times, and output fluctuation is moreThe system is small in integration level, high in stability and high in efficiency.
The invention is realized by the following technical scheme, and provides a winding arrangement structure of a three-phase-to-three-phase radio excitation brushless synchronous motor, which comprises the following specific steps: the stator side multiplexes the three-phase armature winding as excitation energy transmitting end, the rotor side places excitation winding and three-phase receiving induction winding in the same slot, the three-phase induction winding wirelessly obtains excitation energy and then supplies power to the excitation winding through the rectifier, thus realizing three-to-three wireless electric excitation;
for the three-phase armature winding, the phase difference 120 electrical angles in space are distributed according to the phase sequence A-B-C, the distribution mode selects double layers/single layers, and the whole distance/short distance is selected according to specific design; for the exciting winding, two sides of the single-turn exciting winding cross a pole distance, the phase difference is 180 degrees, the current flows oppositely, magnetic fields with different polarities are generated, and direct current required by the working of the exciting winding is supplied by wireless power transmission; for the receiving induction windings, the receiving induction windings and the exciting windings are placed in the same groove, and the three-phase induction windings are arranged according to A-B-C phase sequences in a space with 120 electric angles difference;
the induction winding is a receiving end of the wireless electric energy transmission magnetic coupling mechanism, the excitation energy transmitting coil is multiplexed with the stator three-phase winding, meanwhile, three-phase fundamental frequency current of motor operation and high-frequency current of wireless transmission of excitation energy are injected, and after the three-phase receiving induction winding receives electric energy, the three-phase receiving induction winding supplies power to the excitation winding through high-frequency compensation and rectification, and no additional mechanism is needed to supply power to the excitation winding.
Further, mutual inductance of the three-phase transmitting winding to each phase receiving induction winding is a sinusoidal curve with equal amplitude and 120-degree phase difference, and for the three-phase receiving winding, mutual inductance of the one-phase transmitting winding to the three-phase receiving induction winding is equal in amplitude and 120-degree phase difference, and output fluctuation during rotor rotation is reduced by three-phase synthesis.
Further, the exciting winding and the induction winding are arranged in each slot of the rotor, the pole pair number of the motor is not limited to 4 poles, and the pole pair number can be changed according to application occasions and requirements.
The invention has the beneficial effects that:
(1) The invention provides a winding arrangement structure of a three-phase-to-three-phase radio excitation brushless synchronous motor, which improves the output capacity of radio excitation voltage into three phases to one phase under the condition that the volume structure of a power supply and a motor is basically unchangedThe magnetic field is uniformly distributed, the voltage output and the power transmission are more stable, the system integration level is improved, and the excitation mode is further optimized;
(2) Aiming at the radio excitation synchronous motor, because the occupied space of the receiving induction winding is small, the four-layer lamination winding same-slot arrangement winding structure of excitation and three-phase induction winding is provided, no additional slotting is needed, and the stator and rotor structure and the volume of the original motor are not changed;
(3) The brushless excitation of the synchronous motor is realized, the complete wireless regulation and control of the excitation magnetic field of the motor are realized by adjusting the current of the transmitting end by utilizing the resonance coupling wireless power transmission, the operation requirements of various working conditions of the motor are met, and the control flexibility and stability are greatly expanded.
Drawings
FIG. 1 is an expanded view of a three-phase-to-three-phase radio excitation stator winding and a rotor induction winding;
FIG. 2 is an induction winding arrangement and winding expansion diagram;
FIG. 3 is a stator winding arrangement and winding expansion diagram;
FIG. 4 is a diagram of the arrangement of the excitation winding and the induction winding; wherein, (a) is an integral structure diagram of the motor, (b) is an arrangement structure diagram of a stator winding (transmitting coil), (c) is an arrangement structure diagram of an exciting winding, and (d) is an arrangement structure diagram of a receiving induction winding;
FIG. 5 is a block diagram of a three-phase to single-phase radio excitation synchronous motor system;
FIG. 6 is a block diagram of a three-phase-to-three-phase radio excitation synchronous motor system;
FIG. 7 is a simulated topology diagram of a three-phase to three-phase, three-phase to single-phase wireless excitation system;
fig. 8 is a waveform comparison chart of rectified output voltage of a three-phase to three-phase and three-phase to single-phase wireless excitation receiving terminal.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-8, the invention relates to stator and rotor cores, tooth slot structures, winding distribution, wireless power transmission and the like in an electric excitation synchronous motor, wherein for the electric excitation synchronous motor, a stator armature winding generates an armature magnetic field with N, S alternating polarities in space, and an excitation winding on a rotor also establishes a N, S main pole magnetic field with alternating polarities in space. The invention provides a winding arrangement structure of a three-phase-to-three-phase radio excitation synchronous motor as shown in fig. 1, which specifically comprises the following steps: the stator side multiplexes the three-phase armature winding as excitation energy transmitting end, the rotor side places excitation winding and three-phase receiving induction winding in the same slot, the three-phase induction winding wirelessly obtains excitation energy and then supplies power to the excitation winding through the rectifier, thus realizing three-to-three wireless electric excitation; because of various choices of pole pairs and slot numbers of different motors, a 4-pole 36-slot motor is taken as an illustration of a winding arrangement structure, an arrangement diagram of a stator three-phase armature winding and a rotor wireless receiving induction winding is shown in fig. 2 and 3, the stator three-phase armature winding and the rotor wireless receiving induction winding are used as a three-phase transmitting end and a three-phase receiving end for wireless excitation energy transmission, and 120 electric angles are arranged according to an A-B-C phase sequence in space. In consideration of the number of slots, the induction winding and the exciting winding are placed in the same slot, the induction winding is a receiving end of a wireless electric energy transmission magnetic coupling mechanism, the exciting energy transmitting coil is multiplexed with the stator three-phase winding, meanwhile, three-phase fundamental frequency current and high-frequency current of exciting energy wireless transmission of motor operation are injected, and after the three-phase receiving induction winding receives electric energy, the induction winding is supplied with power through high-frequency compensation and rectification, and no additional mechanism is needed for supplying power to the exciting winding.
The mutual inductance of the three-phase transmitting winding to each phase receiving induction winding is a sine curve with equal amplitude and 120 DEG phase difference, and for the three-phase receiving coils, the mutual inductance of the one-phase transmitting winding to the three-phase receiving induction winding is equal in amplitude and 120 DEG phase difference, and the three-phase synthesis reduces the output fluctuation when the rotor rotates.
As shown in fig. 4, the stator armature winding, the rotor exciting winding and the receiving induction winding are placed in the slots of the stator and the rotor according to the positions, the number of poles of the motor is 4, and the rotor slotting and winding placement can be performed according to the design proposed by the invention for any other motor with any number of poles. Fig. 4 (a) is an overall structure diagram of the motor, and the arrangement rule of each winding is shown in the figure; fig. 4 (b) is a configuration diagram of a stator winding (transmitting coil), wherein the stator winding is supplied with three-phase symmetrical current, generates a rotating magnetic field in space, and simultaneously generates three-phase symmetrical mutual inductance with a receiving coil; fig. 4 (c) is a diagram showing an arrangement structure of the exciting winding; fig. 4 (d) is a structure diagram of receiving induction winding arrangement, three-phase receiving winding spaces are staggered by 120 degrees, the receiving windings and the exciting windings are arranged in a common slot, the exciting windings in the same slot occupy most space, and the induction windings occupy little space.
Taking a 4-pole three-phase-to-three-phase wireless excitation electric excitation synchronous motor with a stator and a rotor 36/12 slot as an example for explanation, wherein the rotor is of a uniformly slotted hidden pole structure, the structural diagram of the whole system and the arrangement method schematic diagram of each winding are shown in fig. 4, and three-phase-to-three-phase and three-phase-to-single-phase wireless power transmission schematic diagram and simulation topology are constructed by combining specific three-phase transmitting windings and three-phase receiving windings self-inductance and mutual inductance data in the motor as shown in fig. 7. Simulation shows that the receiving end rectification output voltage is about three-phase to single-phase transmission when three-phase to three-phase wireless excitation energy is transmittedThe feasibility of the proposed solution of the invention was confirmed by a factor as shown in fig. 8.
Claims (3)
1. The utility model provides a three-phase to three-phase radio excitation brushless synchronous motor winding arrangement structure which characterized in that, the arrangement structure specifically is: the stator side multiplexes the three-phase armature winding as excitation energy transmitting end, the rotor side places excitation winding and three-phase receiving induction winding in the same slot, the three-phase induction winding wirelessly obtains excitation energy and then supplies power to the excitation winding through the rectifier, thus realizing three-to-three wireless electric excitation;
for the three-phase armature winding, the phase difference 120 electrical angles in space are distributed according to the phase sequence A-B-C, the distribution mode selects double layers/single layers, and the whole distance/short distance is selected according to specific design; for the exciting winding, two sides of the single-turn exciting winding cross a pole distance, the phase difference is 180 degrees, the current flows oppositely, magnetic fields with different polarities are generated, and direct current required by the working of the exciting winding is supplied by wireless power transmission; for the receiving induction windings, the receiving induction windings and the exciting windings are placed in the same groove, and the three-phase induction windings are arranged according to A-B-C phase sequences in a space with 120 electric angles difference;
the induction winding is a receiving end of the wireless electric energy transmission magnetic coupling mechanism, the excitation energy transmitting coil is multiplexed with the stator three-phase winding, meanwhile, three-phase fundamental frequency current of motor operation and high-frequency current of wireless transmission of excitation energy are injected, and after the three-phase receiving induction winding receives electric energy, the three-phase receiving induction winding supplies power to the excitation winding through high-frequency compensation and rectification, and no additional mechanism is needed to supply power to the excitation winding.
2. An arrangement according to claim 1, wherein: the mutual inductance of the three-phase transmitting winding to each phase receiving induction winding is a sine curve with equal amplitude and 120 DEG phase difference, and for the three-phase receiving coils, the mutual inductance of the one-phase transmitting winding to the three-phase receiving induction winding is equal in amplitude and 120 DEG phase difference, and the three-phase synthesis reduces the output fluctuation when the rotor rotates.
3. An arrangement according to claim 2, wherein: the exciting winding and the induction winding are arranged in each groove of the rotor, the pole pair number of the motor is not limited to 4 poles, and the motor can be changed according to application occasions and requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311261171.5A CN117375282A (en) | 2023-09-27 | 2023-09-27 | Winding arrangement structure of three-phase-to-three-phase radio excitation brushless synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311261171.5A CN117375282A (en) | 2023-09-27 | 2023-09-27 | Winding arrangement structure of three-phase-to-three-phase radio excitation brushless synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117375282A true CN117375282A (en) | 2024-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311261171.5A Pending CN117375282A (en) | 2023-09-27 | 2023-09-27 | Winding arrangement structure of three-phase-to-three-phase radio excitation brushless synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117375282A (en) |
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2023
- 2023-09-27 CN CN202311261171.5A patent/CN117375282A/en active Pending
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