CN111293804A - Rotor subassembly, motor and compressor - Google Patents
Rotor subassembly, motor and compressor Download PDFInfo
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- CN111293804A CN111293804A CN201811505459.1A CN201811505459A CN111293804A CN 111293804 A CN111293804 A CN 111293804A CN 201811505459 A CN201811505459 A CN 201811505459A CN 111293804 A CN111293804 A CN 111293804A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
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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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
- H02K3/16—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots for auxiliary purposes, e.g. damping or commutating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention provides a rotor assembly, a motor and a compressor, wherein the rotor assembly comprises a rotor core, a plurality of winding slots, a circuit board and a plurality of excitation coils, wherein the plurality of winding slots are arranged on the rotor core, and each winding slot in the plurality of winding slots is communicated along the axial direction of the rotor core; the circuit board is arranged at one end of the rotor core and is provided with a power regulating circuit; each excitation coil in the excitation coils passes through at least two winding slots to be arranged on the rotor core, and two ends of each excitation coil are provided with connecting terminals which are connected in the power regulating circuit. The invention adjusts the current and/or direction flowing through the magnet exciting coil through the power adjusting circuit, thereby changing the number of poles of the motor rotor, improving the waveform of the air gap magnetic field, reducing the magnetic field harmonic wave and effectively improving the motor efficiency.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a rotor assembly, a motor and a compressor.
Background
At present, a motor is necessary electromechanical energy conversion equipment in daily life, industrial and agricultural production processes. The rotor of the motor is provided with the excitation winding, the number of poles of the rotor of the motor is determined by the connection mode of the excitation winding, and after the motor leaves a factory, the number of poles of the rotor of the motor is difficult to change, so that the efficiency and the service performance of the motor are directly influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention provides a rotor assembly.
A second aspect of the invention provides an electric machine.
A third aspect of the present invention is to provide a compressor.
In view of the above, according to a first aspect of the present invention, there is provided a rotor assembly including a rotor core, a plurality of winding slots, a circuit board, and a plurality of excitation coils, wherein the plurality of winding slots are provided on the rotor core, and each of the plurality of winding slots penetrates in an axial direction of the rotor core; the circuit board is arranged at one end of the rotor core and is provided with a power regulating circuit; each excitation coil in the plurality of excitation coils penetrates through the at least two winding grooves to be arranged on the rotor core, two ends of each excitation coil are provided with connecting terminals, and the two connecting terminals are connected in the power regulating circuit; the power regulating circuit is used for adjusting the magnitude and/or direction of current flowing through the exciting coil.
The rotor assembly provided by the invention comprises a rotor core, a plurality of winding grooves, a circuit board and a plurality of excitation coils, wherein the plurality of winding grooves are arranged on the rotor core, and each winding groove in the plurality of winding grooves penetrates through the rotor core along the axial direction of the rotor core. The rotor core is formed by laminating a plurality of rotor punching sheets. Preferably, the rotor punching sheet is a silicon steel sheet. The circuit board is arranged at one end of the rotor core and provided with a power regulating circuit, and the circuit board synchronously rotates along with the rotor core. Each excitation coil in the excitation coils passes through at least two winding grooves to be arranged on the rotor core, connecting terminals are arranged at two ends of each excitation coil, and the two connecting terminals are connected in the power regulating circuit. The connection mode of the wiring terminal and the circuit board comprises mechanical connection and electrical connection. The power regulating circuit is connected with the power supply, and the size and/or the direction of the current flowing through the magnet exciting coil can be adjusted through the power regulating circuit. The invention realizes the change of the pole number of the motor rotor with the rotor component, the improvement of the air gap magnetic field waveform, the reduction of the magnetic field harmonic wave, the reduction of the loss caused by higher harmonic wave, the effective improvement of the motor efficiency, the adjustment of the frequency and the amplitude of the output voltage of the motor, and the improvement of the electric energy quality of the output voltage of the motor by connecting the wiring terminal on the excitation coil with the power adjusting circuit on the circuit board and further adjusting the magnitude and/or the direction of the current flowing through the excitation coil through the power adjusting circuit.
In addition, according to the rotor assembly in the above technical solution provided by the present invention, the following additional technical features may also be provided:
in the above technical solution, preferably, the circuit board is further provided with a driving circuit, the driving circuit is connected to the power regulating circuit, and the driving circuit drives the power regulating circuit according to the control signal.
In the technical scheme, the circuit board is further provided with a driving circuit, the driving circuit is connected with the power regulating circuit, the driving circuit can drive the power regulating circuit according to the control signal, the driving circuit is arranged to realize accurate control of the power regulating circuit, and then the number of poles and the air gap magnetic field of the motor rotor can be accurately regulated according to requirements.
In any of the above technical solutions, preferably, the circuit board is further provided with a communication circuit, the communication circuit is connected with the driving circuit, and the communication circuit communicates with the controller to receive the control signal or send the processing signal.
The circuit board is also provided with a capacitive element which is connected in parallel with two ends of the power supply.
In the technical scheme, a communication circuit is further arranged on the circuit board, the communication circuit is connected with the driving circuit and is in communication connection with the controller, and on one hand, the communication circuit is used for receiving a control signal sent by the controller; on the other hand, the communication circuit can send the processing signal in the power regulating circuit to the controller, so that the controller can know the operation condition of the power regulating circuit, and the stability and the safety of the power regulating circuit are ensured. Wherein the controller comprises an external controller. The communication circuit and the controller are connected in a wireless or wired manner.
In any of the above technical solutions, preferably, the power supply of the power conditioning circuit is a dc power supply or an ac power supply; under the condition that the power supply is an alternating current power supply, the rotor assembly further comprises a rectifying circuit, and the power regulating circuit is connected with the power supply through the rectifying circuit.
In the technical scheme, a power supply of the power regulating circuit is a direct current power supply or an alternating current power supply, and when the power supply is the direct current power supply, the power supply directly supplies power to the power regulating circuit, so that the power regulating circuit can conveniently control the direction of the current flowing through the magnet exciting coil.
Under the condition that the power supply current is an alternating current power supply, the rotor assembly further comprises a rectifying circuit, and the power regulating circuit is connected with the power supply through the rectifying circuit, so that alternating current provided by the alternating current power supply is rectified into direct current through the rectifying circuit to supply power to the power regulating circuit, and the power regulating circuit is further convenient to control the direction of the current flowing through the magnet exciting coil.
The power supply can directly supply power to the power regulating circuit or indirectly supply power to the power regulating circuit. When the output voltage of the power supply is unstable, a voltage stabilizing circuit can be connected between the power supply and the power regulating circuit to further regulate the voltage, so that the voltage of the input power regulating circuit is stable, and the stability and the safety of the power regulating circuit are ensured.
In any of the above technical solutions, preferably, the power regulating circuit includes a first power switch, a second power switch, a third power switch and a fourth power switch, and the first power switch and the second power switch are connected in series to form a first switch group; the third power switch and the fourth power switch are connected in series to form a second switch group, and the first switch group and the second switch group are connected in parallel in the power supply; one end of the excitation coil is connected between the first power switch and the second power switch, and the other end of the excitation coil is connected between the third power switch and the fourth power switch.
In the technical scheme, the power regulating circuit comprises a first power switch, a second power switch, a third power switch and a fourth power switch, wherein the first power switch and the second power switch are connected in series to form a first switch group, the third power switch and the fourth power switch are connected in series to form a second switch group, and the first switch group and the second switch group are connected in parallel in the power supply. The two terminals of the exciting coil can be represented as a negative terminal "N" and a positive terminal "P", and when the current flowing from the N terminal to the P terminal of the exciting coil is in a positive direction, the current flowing from the P terminal to the N terminal of the exciting coil is in a negative direction. The N terminal of the excitation coil is connected between the first power switch and the second power switch, and the P terminal of the excitation coil is connected between the third power switch and the fourth power switch. The switching of the direction of the current flowing through the magnet exciting coil and the adjustment of the magnitude of the current are realized by controlling the on, off, on time and off time of the first power switch, the second power switch, the third power switch and the fourth power switch.
In any of the above technical solutions, preferably, the control signal includes: a first control signal or a second control signal; under the condition that the driving circuit receives a first control signal, the first power switch and the fourth power switch are driven to be connected, and the second power switch and the third power switch are driven to be disconnected; and under the condition that the driving circuit receives the second control signal, the second power switch and the third power switch are driven to be conducted, and the first power switch and the fourth power switch are disconnected.
In the technical scheme, the control signal comprises a first control signal or a second control signal, and when the drive circuit receives the first control signal, the first power switch and the fourth power switch are driven to be switched on, the second power switch and the third power switch are switched off, and at the moment, current flows from an N terminal of the exciting coil to a P terminal, namely, the direction of the current flowing through the exciting coil is a positive direction; and under the condition that the driving circuit receives a second control signal, the second power switch and the third power switch are driven to be connected, the first power switch and the fourth power switch are disconnected, at the moment, the current flows from the P terminal of the exciting coil to the N terminal, namely, the direction of the current flowing through the exciting coil is a negative direction, and the direction of the current flowing through the exciting coil can be switched by driving the first power switch, the second power switch, the third power switch and the fourth power switch to be connected or disconnected through the control signal. Similarly, when the on or off loop of the first power switch, the second power switch, the third power switch and the fourth power switch in the power regulating circuit is determined, the purpose of regulating the current flowing through the magnet exciting coil can be realized by controlling the on time and the off time.
In any of the above technical solutions, preferably, the number of the power regulating circuits is multiple, one power regulating circuit is connected with one excitation coil to form a power regulating group, and the multiple power regulating groups are respectively connected with the power supply.
In the technical scheme, the number of the power regulating circuits is multiple, one power regulating circuit and one excitation coil form a power regulating group, and the multiple power regulating groups are respectively connected with a power supply. By providing each excitation coil with a corresponding power adjusting circuit, the current magnitude and/or direction in each excitation coil can be adjusted. Through carrying out the independent control to every excitation coil, and then change the electric motor rotor number of poles, control air gap magnetic field to the realization reduces the magnetic field harmonic, reduces the loss because of higher harmonic leads to, improves motor efficiency.
In any of the above technical solutions, preferably, the rotor assembly further includes a first shaft hole, a second shaft hole and a rotating shaft, the first shaft hole is disposed in the center of the rotor core; the second shaft hole is arranged in the center of the circuit board; the rotating shaft penetrates through the first shaft hole and the second shaft hole to be fixedly connected with the rotor core and the circuit board.
The wiring terminal protrudes from the end face of the rotor core close to the circuit board.
In this technical scheme, the rotor subassembly still includes first shaft hole, second shaft hole and pivot, and wherein first shaft hole sets up on rotor core. Preferably, the first shaft hole is provided at a central position of the rotor core. The second shaft hole is arranged on the circuit board. Preferably, the second shaft hole is provided at a central position of the circuit board corresponding to the first shaft hole. The rotating shaft penetrates through the first shaft hole to be fixedly connected with the rotor core, and the rotating shaft penetrates through the second shaft hole to be fixedly connected with the circuit board. The rotating shaft is driven to rotate in the rotating process of the rotor core, so that the circuit board connected to the rotating shaft, the rotor core and the rotating shaft synchronously rotate. Through making two binding post protrusions on the excitation coil be close to the terminal surface of circuit board in rotor core, and then be convenient for binding post and circuit board are connected, reduce the processing degree of difficulty.
In any of the above technical solutions, preferably, the power supply is an excitation generator, and the excitation generator is connected to the rotating shaft and supplies power to the power regulating circuit; the excitation generator is arranged at one end of the rotating shaft close to the circuit board.
In the technical scheme, the power supply is an excitation generator, the excitation generator is connected to the rotating shaft and supplies power to the power regulating circuit, an external power supply is not required to be connected through the excitation generator, loss of a connecting part of the circuit board and the external power supply is avoided, and the service life of the motor is prolonged.
In any of the above technical solutions, preferably, the rotor assembly further includes a slip ring and an electric brush, the slip ring is fixedly connected to the rotating shaft and connected to the power conditioning circuit; one end of the electric brush is electrically connected with the slip ring, and the other end of the electric brush is connected with a power supply.
In the technical scheme, when the power regulating circuit adopts an external power supply to supply power, the rotor assembly further comprises a slip ring and an electric brush, the slip ring is fixedly connected to the rotating shaft and connected with the power regulating circuit, and the slip ring and the rotating shaft rotate synchronously. One end of the electric brush is in sliding fit with the slip ring and is electrically connected with the slip ring, and the other end of the electric brush is fixedly connected with a power supply. The power conditioning circuit is powered through slip rings and brushes.
In any of the above technical solutions, preferably, a part of the rotor core between two adjacent winding slots in the plurality of winding slots is a rotor magnetic pole; the plurality of rotor magnetic poles comprise a first rotor magnetic pole and a second rotor magnetic pole, and a connecting line of the center of the first rotor magnetic pole and the center of the second rotor magnetic pole penetrates through the first shaft hole; the first rotor magnetic pole and the second rotor magnetic pole have the same excitation magnetic potential direction.
In the technical scheme, at least part of the rotor iron cores between two adjacent winding slots in the plurality of winding slots are rotor magnetic poles, the plurality of rotor magnetic poles comprise a first rotor magnetic pole and a second rotor magnetic pole, a connecting line of the center of the first rotor magnetic pole and the center of the second rotor magnetic pole penetrates through the first shaft hole, and the excitation magnetic potentials of the first rotor magnetic pole and the second rotor magnetic pole are equal in size and same in direction. The excitation magnetic potential directions of the rotor magnetic poles can include two types, one type is that the rotor iron core points to a stator iron core arranged on the periphery of the rotor iron core, and the other type is that the stator iron core points to the rotor iron core.
According to a second aspect of the present invention, there is provided an electric machine comprising: a rotor assembly as claimed in any one of the preceding claims.
The motor provided by the invention comprises the rotor assembly in any technical scheme, so that the motor has all the beneficial effects of the rotor assembly, and the details are not repeated.
According to a third aspect of the present invention, there is provided a compressor comprising: a rotor assembly or a motor as provided in any one of the above claims.
The compressor provided by the invention comprises the rotor assembly or the motor in any technical scheme, so that the compressor has all the beneficial effects of the rotor assembly or the motor, and the description is omitted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 illustrates an exploded view of the construction of a rotor assembly in one embodiment according to the present invention;
FIG. 2 illustrates a partial structural schematic view of a rotor assembly in one embodiment according to the present invention;
FIG. 3 illustrates a partial structural schematic view of a rotor assembly in accordance with another embodiment of the present invention;
FIG. 4 illustrates a schematic circuit diagram of the field coils and the circuit board of the rotor assembly in one embodiment according to the present invention;
fig. 5 shows a schematic circuit diagram of the field coil and the circuit board of the rotor assembly according to another embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:
1 rotor core, 12 first shaft holes, 2 winding slots, 3 circuit boards, 32 second shaft holes, 4 excitation coils, 42 wiring terminals, 5 rotating shafts and 6 rotor assemblies.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A rotor assembly, a motor, and a compressor according to some embodiments of the present invention will be described with reference to fig. 1 to 5.
According to a first aspect of the present invention, there is provided a rotor assembly 6 including a rotor core 1, a plurality of winding slots 2, a circuit board 3, and a plurality of excitation coils 4, wherein the plurality of winding slots 2 are provided on the rotor core 1, and each of the plurality of winding slots 2 penetrates in an axial direction of the rotor core 1; the circuit board 3 is arranged at one end of the rotor core 1, and the circuit board 3 is provided with a power regulating circuit; each of the plurality of excitation coils 4 passes through at least two winding slots 2 to be disposed on the rotor core 1, and two terminals 42 are disposed at both ends of the excitation coil 4, and the two terminals 42 are connected in the power adjusting circuit; the power regulating circuit is used for adjusting the magnitude and/or direction of the current flowing through the exciting coil 4.
As shown in fig. 1 to 3, a rotor assembly 6 provided by the present invention includes a rotor core 1, a plurality of winding slots 2, a circuit board 3, and a plurality of field coils 4, wherein the plurality of winding slots 2 are provided on the rotor core 1, and each of the plurality of winding slots 2 penetrates in an axial direction of the rotor core 1. The rotor core 1 is formed by laminating a plurality of rotor punching sheets. Preferably, the rotor punching sheet is a silicon steel sheet. The circuit board 3 is arranged at one end of the rotor core 1, the circuit board 3 is provided with a power regulating circuit, and the circuit board 3 synchronously rotates along with the rotor core 1. Each of the plurality of excitation coils 4 passes through at least two winding slots 2 to be disposed on the rotor core 1, both ends of the excitation coil 4 are provided with connection terminals 42, and the two connection terminals 42 are connected in a power adjusting circuit. The connection of the connection terminals 42 to the circuit board 3 includes mechanical connection and electrical connection. The power regulating circuit is connected to the power supply, and the magnitude and/or direction of the current flowing through the field coil 4 can be adjusted by the power regulating circuit. The invention realizes the change of the pole number of the motor rotor with the rotor component 6, the improvement of the air gap magnetic field waveform, the reduction of the magnetic field harmonic wave, the reduction of the loss caused by higher harmonic wave, the effective improvement of the motor efficiency, the adjustment of the frequency and the amplitude of the output voltage of the motor, and the improvement of the electric energy quality of the output voltage of the motor by connecting the wiring terminal 42 on the excitation coil 4 with the power adjusting circuit on the circuit board 3 and then adjusting the magnitude and/or the direction of the current flowing through the excitation coil 4 through the power adjusting circuit.
In an embodiment of the present invention, it is preferable that a driving circuit is further disposed on the circuit board 3, the driving circuit is connected to the power conditioning circuit, and the driving circuit drives the power conditioning circuit according to the control signal.
In this embodiment, the circuit board 3 is further provided with a driving circuit, the driving circuit is connected to the power regulating circuit, the driving circuit can drive the power regulating circuit according to the control signal, and the driving circuit is arranged to realize accurate control of the power regulating circuit, so that the number of poles of the motor rotor and the air gap magnetic field can be accurately regulated according to requirements.
In one embodiment of the present invention, preferably, a communication circuit is further disposed on the circuit board 3, and the communication circuit is connected to the driving circuit, and the communication circuit communicates with the controller to receive the control signal or transmit the processing signal.
The circuit board 3 is further provided with a capacitive element C, and the capacitive element C is connected in parallel to two ends of the power supply.
In this embodiment, the circuit board 3 is further provided with a communication circuit, the communication circuit is connected with the driving circuit, the communication circuit is connected with the controller in a communication manner, and on one hand, the communication circuit is used for receiving a control signal sent by the controller; on the other hand, the communication circuit can send the processing signal in the power regulating circuit to the controller, so that the controller can know the operation condition of the power regulating circuit, and the stability and the safety of the power regulating circuit are ensured. Wherein the controller comprises an external controller. The communication circuit and the controller are connected in a wireless or wired manner. As shown in fig. 3 and 4, by providing the capacitive element C, stability and safety of the power supply are further ensured.
In one embodiment of the present invention, preferably, the power supply source of the power conditioning circuit is a direct current power source or an alternating current power source; in the case that the power supply is an ac power supply, the rotor assembly 6 further includes a rectifier circuit, and the power adjusting circuit is connected to the power supply through the rectifier circuit.
In this embodiment, the power supply is a dc power supply or an ac power supply, and when the power supply is a dc power supply, the power supply directly supplies power to the power regulating circuit, so that the power regulating circuit can conveniently control the direction of the current flowing through the exciting coil 4.
Under the condition that the power supply current is an alternating current power supply, the rotor assembly 6 further comprises a rectifying circuit, and the power regulating circuit is connected with the power supply through the rectifying circuit, so that alternating current provided by the alternating current power supply is rectified into direct current through the rectifying circuit to supply power to the power regulating circuit, and the power regulating circuit is further convenient to control the direction of the current flowing through the magnet exciting coil 4.
The power supply can directly supply power to the power regulating circuit or indirectly supply power to the power regulating circuit. When the output voltage of the power supply is unstable, a voltage stabilizing circuit can be connected between the power supply and the power regulating circuit to further regulate the voltage, so that the voltage of the input power regulating circuit is stable, and the stability and the safety of the power regulating circuit are ensured.
In one embodiment of the present invention, preferably, the power regulating circuit includes a first power switch D1, a second power switch D2, a third power switch D3 and a fourth power switch D4, the first power switch D1 and the second power switch D2 are connected in series to form a first switch group; the third power switch D3 and the fourth power switch D4 are connected in series to form a second switch group, and the first switch group and the second switch group are connected in parallel in the power supply; one end of the exciting coil 4 is connected between the first power switch D1 and the second power switch D2, and the other end of the exciting coil 4 is connected between the third power switch D3 and the fourth power switch D4.
As shown in fig. 4 and 5, in this embodiment, the power conditioning circuit includes a first power switch D1, a second power switch D2, a third power switch D3 and a fourth power switch D4, the first power switch D1 is connected in series with the second power switch D2 to form a first switch group, and the third power switch D3 is connected in series with the fourth power switch D4 to form a second switch group, wherein the first switch group and the second switch group are connected in parallel in the power supply. The rotor assembly 6 includes 8 mutually independent excitation coils 4, each excitation coil 4 has 2 connection terminals 42, two connection terminals 42 of the excitation coil 4 can be represented as a negative terminal "N" and a positive terminal "P", and when a current flowing from the N terminal to the P terminal of the excitation coil 4 is a positive direction, the current flowing from the P terminal to the N terminal of the excitation coil 4 is a negative direction. The terminals 42 of the 8 excitation coils 4 can be denoted as 1N, 1P, 2N, 2P … …, 8N, 8P. The N terminal of the exciting coil 4 is connected between the first power switch D1 and the second power switch D2, and the P terminal of the exciting coil 4 is connected between the third power switch D3 and the fourth power switch D4. By controlling the on, off, on time and off time of the first power switch, the second power switch, the third power switch and the fourth power switch, the switching of the direction of the current flowing through the excitation coil 4 and the adjustment of the magnitude of the current are realized.
In one embodiment of the present invention, preferably, the control signal includes: a first control signal or a second control signal; under the condition that the driving circuit receives the first control signal, the first power switch D1 and the fourth power switch D4 are driven to be turned on, and the second power switch D2 and the third power switch D3 are driven to be turned off; when the driving circuit receives the second control signal, the second power switch D2 and the third power switch D3 are driven to be turned on, and the first power switch D1 and the fourth power switch D4 are driven to be turned off.
In this embodiment, the control signal includes a first control signal or a second control signal, and when the driving circuit receives the first control signal, the first power switch D1 and the fourth power switch D4 are driven to be turned on, and the second power switch D2 and the third power switch D3 are turned off, as shown in fig. 4, when the current flows from the N terminal to the P terminal of the exciting coil 4, that is, the current flowing through the exciting coil 4 is in the positive direction; when the driving circuit receives the second control signal, the second power switch D2 and the third power switch D3 are driven to be turned on, the first power switch D1 and the fourth power switch D4 are driven to be turned off, and at this time, current flows from the P terminal to the N terminal of the exciting coil 4, that is, the direction of current flowing through the exciting coil 4 is a negative direction, and the direction of current flowing through the exciting coil 4 can be switched by driving the first power switch D1, the second power switch D2, the third power switch D3 and the fourth power switch D4 to be turned on and off through the control signal. Likewise, when the on or off loop of the first power switch D1, the second power switch D2, the third power switch D3 and the fourth power switch D4 in the power conditioning circuit has been determined, the purpose of adjusting the magnitude of the current flowing through the exciting coil 4 can be achieved by controlling the on time and the off time.
In one embodiment of the present invention, preferably, the number of the power conditioning circuits is plural, one power conditioning circuit is connected to one excitation coil 4 to form a power conditioning group, and the plural power conditioning groups are respectively connected to the power supply.
As shown in fig. 4 and 5, in this embodiment, the number of the power conditioning circuits is plural, and one power conditioning circuit and one excitation coil 4 form power conditioning groups, and the plural power conditioning groups are respectively connected to the power supply. By providing each excitation coil 4 with a corresponding power adjustment circuit, the current level and/or direction in each excitation coil 4 can be adjusted. As shown in fig. 5, each field coil 4 is individually controlled to change the number of poles of the motor rotor, and control the air-gap magnetic field, so as to reduce the magnetic field harmonics, reduce the loss caused by higher harmonics, and improve the motor efficiency.
In one embodiment of the present invention, preferably, the rotor assembly 6 further includes a first shaft hole 12, a second shaft hole 32, and a rotating shaft 5, the first shaft hole 12 being disposed at the center of the rotor core 1; the second shaft hole 32 is provided in the center of the circuit board 3; the rotation shaft 5 passes through the first shaft hole 12 and the second shaft hole 32 to be fixedly connected with the rotor core 1 and the circuit board 3.
The connecting terminal 42 protrudes from the end face of the rotor core 1 close to the circuit board 3.
As shown in fig. 1 to 3, in this embodiment, the rotor assembly 6 further includes a first shaft hole 12, a second shaft hole 32, and a rotating shaft 5, wherein the first shaft hole 12 is provided on the rotor core 1. Preferably, the first shaft hole 12 is provided at a central position of the rotor core 1. The second shaft hole 32 is provided on the circuit board 3. Preferably, the second shaft hole 32 is provided at a central position of the circuit board 3 corresponding to the first shaft hole 12. The rotating shaft 5 penetrates through the first shaft hole 12 to be fixedly connected with the rotor core 1, and the rotating shaft 5 penetrates through the second shaft hole 32 to be fixedly connected with the circuit board 3. The rotating shaft 5 is driven to rotate in the rotating process of the rotor core 1, so that the circuit board 3 connected to the rotating shaft 5 rotates synchronously with the rotor core 1 and the rotating shaft 5. Through making two binding post 42 protrusion on excitation coil 4 be close to the terminal surface of circuit board 3 in rotor core 1, and then be convenient for binding post 42 and be connected with circuit board 3, reduce the processing degree of difficulty.
In one embodiment of the present invention, preferably, the power supply is an excitation generator, which is connected to the rotating shaft 5 and supplies power to the power conditioning circuit; the excitation generator is arranged at one end of the rotating shaft 5 close to the circuit board 3.
In this embodiment, the power supply is an excitation generator, the excitation generator is connected to the rotating shaft 5 and supplies power to the power regulating circuit, and the excitation generator is adopted without being connected to an external power supply, so that the loss of a connecting part between the circuit board 3 and the external power supply is avoided, and the service life of the motor is prolonged.
In one embodiment of the present invention, preferably, the rotor assembly 6 further comprises slip rings fixedly connected to the rotating shaft 5 and connected to the power conditioning circuit, and brushes; one end of the electric brush is electrically connected with the slip ring, and the other end of the electric brush is connected with a power supply.
In this embodiment, when the power conditioning circuit is powered by an external power supply, the rotor assembly 6 further includes a slip ring fixedly connected to the rotating shaft 5 and connected to the power conditioning circuit, and an electric brush, and the slip ring and the rotating shaft 5 rotate synchronously. One end of the electric brush is in sliding fit with the slip ring and is electrically connected with the slip ring, and the other end of the electric brush is fixedly connected with a power supply. The power conditioning circuit is powered through slip rings and brushes.
In one embodiment of the present invention, it is preferable that a portion of the rotor core 1 between adjacent two winding slots 2 among the plurality of winding slots 2 be a rotor pole; the plurality of rotor magnetic poles comprise a first rotor magnetic pole and a second rotor magnetic pole, and a connecting line of the center of the first rotor magnetic pole and the center of the second rotor magnetic pole passes through the first shaft hole 12; the first rotor magnetic pole and the second rotor magnetic pole have the same excitation magnetic potential direction.
As shown in fig. 3 and 4, in this embodiment, a part of the rotor core 1 between two adjacent winding slots 2 in the plurality of winding slots 2 is a rotor magnetic pole, the plurality of rotor magnetic poles includes a first rotor magnetic pole and a second rotor magnetic pole, and a line connecting the center of the first rotor magnetic pole and the center of the second rotor magnetic pole passes through the first shaft hole 12, and the excitation magnetic potentials of the first rotor magnetic pole and the second rotor magnetic pole are equal in magnitude and same in direction. The excitation magnetic potential directions of the rotor magnetic poles may include two types, one type is a direction from the rotor core 1 to the stator core arranged at the periphery of the rotor core 1, and the other type is a direction from the stator core to the rotor core 1.
According to a second aspect of the present invention, there is provided an electric machine comprising: a rotor assembly 6 as provided in any of the embodiments above.
The motor provided by the invention comprises the rotor assembly 6 in any embodiment, so that the motor has all the beneficial effects of the rotor assembly 6, and the description is omitted.
According to a third aspect of the present invention, there is provided a compressor comprising: a rotor assembly 6 or motor as provided in any of the embodiments above.
The compressor provided by the invention comprises the rotor assembly 6 or the motor in any embodiment, so that the compressor has all the beneficial effects of the rotor assembly 6 or the motor, and the description is omitted.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A rotor assembly, comprising:
a rotor core;
a plurality of winding slots provided in the rotor core, each of the plurality of winding slots penetrating in an axial direction of the rotor core;
the circuit board is arranged at one end of the rotor core and is provided with a power regulating circuit;
a plurality of excitation coils, each of which passes through at least two of the winding slots to be disposed on the rotor core, both ends of the excitation coil being provided with connection terminals, and both of the connection terminals being connected in the power conditioning circuit;
wherein the power regulating circuit is used for adjusting the magnitude and/or direction of the current flowing through the exciting coil.
2. The rotor assembly of claim 1, wherein the circuit board further has disposed thereon:
and the driving circuit is connected with the power regulating circuit and drives the power regulating circuit according to a control signal.
3. The rotor assembly of claim 2, wherein the circuit board further has disposed thereon:
a communication circuit connected with the drive circuit, the communication circuit in communication with a controller to receive the control signal or to send a processed signal.
4. The rotor assembly of claim 2 or 3,
the power supply of the power regulating circuit is a direct current power supply or an alternating current power supply;
under the condition that the power supply is an alternating current power supply, the rotor assembly further comprises a rectifying circuit, and the power regulating circuit is connected with the power supply through the rectifying circuit.
5. The rotor assembly of claim 4, wherein the power conditioning circuit comprises:
a first power switch;
the second power switch is connected with the first power switch in series to form a first switch group;
a third power switch;
the fourth power switch is connected with the third power switch in series to form a second switch group, and the first switch group and the second switch group are connected in the power supply in parallel;
one end of the excitation coil is connected between the first power switch and the second power switch, and the other end of the excitation coil is connected between the third power switch and the fourth power switch.
6. The rotor assembly of claim 5, wherein the control signal comprises: a first control signal or a second control signal;
under the condition that the driving circuit receives the first control signal, the first power switch and the fourth power switch are driven to be connected, and the second power switch and the third power switch are driven to be disconnected;
and under the condition that the driving circuit receives the second control signal, the second power switch and the third power switch are driven to be conducted, and the first power switch and the fourth power switch are disconnected.
7. The rotor assembly of claim 4,
the power regulating circuit is connected with the excitation coil to form a power regulating group, and the power regulating groups are respectively connected with the power supply.
8. The rotor assembly of claim 4, further comprising:
a first shaft hole provided at the center of the rotor core;
a second shaft hole disposed at the center of the circuit board;
the rotating shaft penetrates through the first shaft hole and the second shaft hole to be fixedly connected with the rotor core and the circuit board;
the wiring terminal protrudes out of the end face of the rotor core close to the circuit board.
9. The rotor assembly of claim 8,
the power supply is an excitation generator which is connected to the rotating shaft and supplies power to the power regulating circuit;
the excitation generator is arranged at one end, close to the circuit board, of the rotating shaft.
10. The rotor assembly of claim 8, further comprising:
the slip ring is fixedly connected to the rotating shaft and is connected with the power regulating circuit;
and one end of the electric brush is electrically connected with the slip ring, and the other end of the electric brush is connected with the power supply.
11. The rotor assembly of claim 10,
a part of the rotor core between two adjacent winding slots in the plurality of winding slots is a rotor magnetic pole;
the plurality of rotor magnetic poles comprise a first rotor magnetic pole and a second rotor magnetic pole, and a connecting line of the center of the first rotor magnetic pole and the center of the second rotor magnetic pole penetrates through the first shaft hole;
the excitation magnetic potentials of the first rotor magnetic pole and the second rotor magnetic pole are equal in size and same in direction.
12. An electric machine, comprising: a rotor assembly as claimed in any one of claims 1 to 11.
13. A compressor, comprising: a rotor assembly as claimed in any one of claims 1 to 11, or an electric machine as claimed in claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505459.1A CN111293804A (en) | 2018-12-10 | 2018-12-10 | Rotor subassembly, motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505459.1A CN111293804A (en) | 2018-12-10 | 2018-12-10 | Rotor subassembly, motor and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111293804A true CN111293804A (en) | 2020-06-16 |
Family
ID=71021878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811505459.1A Pending CN111293804A (en) | 2018-12-10 | 2018-12-10 | Rotor subassembly, motor and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111293804A (en) |
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2018
- 2018-12-10 CN CN201811505459.1A patent/CN111293804A/en active Pending
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