CN110943587A - Electric machine - Google Patents
Electric machine Download PDFInfo
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- CN110943587A CN110943587A CN201811119701.1A CN201811119701A CN110943587A CN 110943587 A CN110943587 A CN 110943587A CN 201811119701 A CN201811119701 A CN 201811119701A CN 110943587 A CN110943587 A CN 110943587A
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- rotor
- motor
- electrically connected
- circuit element
- circuit
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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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
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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
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
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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
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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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
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/22—Optical devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
The invention discloses a motor. The motor comprises a motor shell, a rotor assembly, a first circuit element and a second circuit element, wherein the first circuit element is suitable for being electrically connected with a power supply, and the second circuit element is suitable for controlling the rotor assembly to rotate. The motor casing has first through passage, and the motor casing is equipped with first connecting piece. The rotor assembly is arranged in the first through channel in a penetrating mode, the rotor assembly is rotatably connected with the motor shell, the rotor assembly is provided with a second connecting piece, and the second connecting piece is electrically connected with the first connecting piece. The first circuit element is arranged on the motor shell and electrically connected with the first connecting piece. The second circuit element is arranged on the rotor assembly and is electrically connected with the second connecting piece. According to the motor, the rotor assembly is only provided with the second connecting piece for supplying power to the second circuit element, so that the problem that the rotor assembly is provided with a plurality of connecting pieces can be solved, the structure of the rotor assembly can be simplified, the size of the rotor assembly can be reduced, and the production cost of the motor can be reduced.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor.
Background
In the counter-rotating electric machine, since both rotors are rotating, in order to introduce electric current to the coil of one of the rotors, in the related art, it is realized by brushes fixed to a casing and slip rings fixed to the rotors. The power supply of each phase of the motor is realized by a slip ring. Along with the increase of the number of phases of the motor, the number of the slip rings and the number of the carbon brushes of the slip rings are increased, so that the problems of the increase of the axial length of the whole motor and the overlarge volume of the motor are caused. As there are more phases, the number of wires increases, requiring a concentrated harness or other means to organize more outgoing lines. And for a high-power motor, the safety distance between the slip rings is increased, and the axial length of the motor is further increased.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to provide a motor that is simple in structure and small in size.
According to an embodiment of the present invention, a motor includes: the motor comprises a motor shell, a first connecting piece and a second connecting piece, wherein the motor shell is provided with a first through channel; the rotor assembly penetrates through the first through channel and is rotatably connected with the motor shell, and a second connecting piece is arranged on the rotor assembly and is electrically connected with the first connecting piece; the first circuit element is suitable for being electrically connected with a power supply, the first circuit element is arranged on the motor shell, and the first circuit element is electrically connected with the first connecting piece; and the second circuit element is suitable for controlling the rotor assembly to rotate, is arranged on the rotor assembly and is electrically connected with the second connecting piece.
According to the motor provided by the embodiment of the invention, the second circuit element is arranged on the rotor assembly, the rotor assembly can be controlled to rotate by the second circuit element, and the rotor assembly is only provided with the second connecting piece for supplying power to the second circuit element, so that the problem that a plurality of connecting pieces are arranged on the rotor assembly can be avoided, the structure of the rotor assembly can be simplified, the size of the rotor assembly can be reduced, the production cost of the motor can be reduced, and the processing technology of the motor can be simplified. In addition, the second circuit element can rotate along with the rotor assembly, so that the second circuit element can be radiated by utilizing air flow, and the use performance of the motor can be improved.
According to some embodiments of the invention, the rotor assembly comprises: the first rotor is arranged in the first through channel in a penetrating mode, the first rotor is rotatably connected with the motor shell, and the first rotor is provided with a second through channel; the second rotor is arranged in the second through channel in a penetrating mode, is rotatably connected with the first rotor, and is opposite to the rotating direction of the first rotor in rotating direction; the first rotor is provided with both the second circuit element and a second connecting member, and the second circuit element is electrically connected to the first rotor provided with the second circuit element.
In some embodiments of the invention, the outer peripheral wall of the first rotor is provided with the second connector and the second circuit member; the internal perisporium of motor casing is equipped with first connecting piece.
In some embodiments of the invention, the first rotor comprises a plurality of sets of windings; the second circuit element includes: and the inverter circuit is electrically connected with the second connecting piece and is suitable for being electrically connected with the plurality of groups of windings so as to drive the rotor assembly to rotate.
In some embodiments of the invention, the second circuit element further comprises: and the control element is electrically connected with the inverter circuit so as to control the on-off of the electrical connection between the inverter circuit and the plurality of groups of windings.
In some embodiments of the present invention, the control element includes a position signal detection circuit, the position signal detection circuit is disposed on the first rotor, and the position signal detection circuit is electrically connected to the inverter circuit for detecting a relative position of the first rotor and the second rotor.
In some embodiments of the present invention, the position signal detection circuit is a hall device or a photoelectric encoder.
In some embodiments of the invention, the first rotor is connected to the motor casing by a first bearing assembly; the second rotor is connected to the first rotor by a second bearing assembly.
In some embodiments of the invention, the first bearing assembly comprises two sets, wherein one set of the first bearing assembly is provided at one axial end of the motor casing, and the other set of the first bearing assembly is provided at the other axial end of the motor casing.
According to some embodiments of the invention, the first connector comprises: a first carbon brush electrically connected to the first circuit element; a second carbon brush spaced apart from the first carbon brush, the second carbon brush electrically connected to the first circuit element; the second connector includes: the first slip ring is electrically connected with the first carbon brush and sleeved on the rotor assembly; the second slip ring and the first slip ring are spaced apart along the axis direction of the rotor assembly, the second slip ring is electrically connected with the second carbon brush, the rotor assembly is sleeved with the second slip ring, the first slip ring is opposite to the first carbon brush, and the second slip ring is opposite to the second carbon brush.
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 is a schematic cross-sectional view of a motor according to an embodiment of the present invention.
Reference numerals:
the motor (1) is provided with a motor,
a motor case 10, a first through passage 100,
a first connection member 110, a first carbon brush 111, a second carbon brush 112,
the rotor assembly 20, the first rotor 210, the second through-passage 211, the second rotor 220,
a second connecting member 230, a first slip ring 231, a second slip ring 232,
a first one of the circuit elements 30 is,
a second circuit element (40) is provided,
the first bearing assembly 50 is provided with a first bearing component,
a second bearing assembly 60.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1, the motor 1 according to an embodiment of the present invention includes a motor case 10, a rotor assembly 20, a first circuit member 30, and a second circuit member 40.
Specifically, as shown in fig. 1, the motor housing 10 has a first through passage 100, the rotor assembly 20 is inserted into the first through passage 100, and the rotor assembly 20 is rotatably connected to the motor housing 10. It is understood that the rotor assembly 20 is disposed inside the motor housing 10, the rotor assembly 20 is connected to the motor housing 10, and the rotor assembly 20 can rotate (e.g., spin) relative to the motor housing 10. It should be noted that the above-mentioned "connection" is to be understood in a broad sense and may be either a direct connection or an indirect connection.
As shown in fig. 1, the motor case 10 is provided with a first connector 110, the first circuit element 30 is provided on the motor case 10, and the first circuit element 30 is electrically connected to the first connector 110. The first circuit member 30 is adapted to be electrically connected to a power source. The rotor assembly 20 is provided with a second connector 230, the second circuit member 40 is provided at the rotor assembly 20, and the second circuit member 40 is electrically connected to the second connector 230. The second circuit member 40 is adapted to control rotation of the rotor assembly 20. The second connector 230 is electrically connected to the first connector 110.
For example, the first circuit element 30 may be a rectifier circuit. The power supply may be an ac mains. The first circuit element 30 may convert the alternating current into the direct current and transmit the direct current to the first connector 110, the first connector 110 further transmits the direct current to the second connector 230, the second connector 230 provides the direct current to the second circuit element 40, the second circuit element 40 may start to operate, and the second circuit element 40 may control the rotation of the rotor assembly 20.
In order to continue rotation of the rotor assembly, multiple phase circuits in the rotor assembly need to be powered. In the related art, each phase of the motor needs to be electrically connected to the connecting member fixed to the rotor through the connecting member fixed to the motor case. The number of connecting pieces on the rotor is in direct proportion to the number of motor phases, and along with the increase of the number of motor phases, the number of connecting pieces also can increase therewith, so that the problems that the axial length of the whole motor is increased and the motor is too large in size can be caused.
According to the motor 1 of the embodiment of the present invention, the second circuit element 40 is disposed on the rotor assembly 20, the second circuit element 40 can control the rotor assembly 20 to rotate, and the rotor assembly 20 only needs to be disposed with the second connecting member 230 for supplying power to the second circuit element 40, so that the problem of disposing a plurality of connecting members on the rotor assembly 20 can be avoided, the structure of the rotor assembly 20 can be further simplified, the volume of the rotor assembly 20 can be reduced, the production cost of the motor 1 can be reduced, and the processing technology of the motor 1 can be simplified. In addition, the second circuit element 40 can rotate along with the rotor assembly 20, so that the second circuit element 40 can be cooled by using air flow, and the use performance of the motor 1 can be improved.
As shown in fig. 1, according to some embodiments of the present invention, the rotor assembly 20 may include a first rotor 210 and a second rotor 220, the first rotor 210 is disposed through the first through passage 100, and the first rotor 210 is rotatably connected with the motor case 10. The first rotor 210 has a second through channel 211, the second rotor 220 is disposed in the second through channel 211, and the second rotor 220 is rotatably connected to the first rotor 210. The second rotor 220 rotates in the opposite direction to the first rotor 210. One of the first and second rotors 210 and 220 is provided with both the second circuit element 40 and the second connection member 230. The second circuit element 40 is electrically connected to the first rotor 210 or the second rotor 220 provided with the second circuit element 40.
For example, in some embodiments of the present invention, the rotor assembly 20 may include a first rotor 210 and a second rotor 220, the first rotor 210 is disposed through the first through passage 100, and the first rotor 210 is rotatably connected with the motor housing 10. The first rotor 210 has a second through channel 211, the second rotor 220 is disposed in the second through channel 211, and the second rotor 220 is rotatably connected to the first rotor 210. The second rotor 220 rotates in the opposite direction to the first rotor 210. The first rotor 210 is provided with the second circuit element 40 and the second connection member 230. The second circuit element 40 is electrically connected to the first rotor 210.
For another example, in some embodiments of the present invention, the rotor assembly 20 may include a first rotor 210 and a second rotor 220, the first rotor 210 is disposed in the first through channel 100, and the first rotor 210 is rotatably connected with the motor housing 10. The first rotor 210 has a second through channel 211, the second rotor 220 is disposed in the second through channel 211, and the second rotor 220 is rotatably connected to the first rotor 210. The second rotor 220 rotates in the opposite direction to the first rotor 210. The second rotor 220 is provided with the second circuit element 40 and the second connection member 230. The second circuit element 40 is electrically connected to the second rotor 220.
It should be noted that the conventional motor is composed of a stator and a rotor, and the conventional motor can only supply power to the stator but cannot supply power to the rotor. The power supply of the traditional motor is connected with the stator, and the stator generates a variable magnetic field, so that the variable magnetic field drives the rotor to rotate to apply work to the outside. The motor 1 according to the embodiment of the present invention forms a natural double-sided coaxial counter-rotation effect by using the acting force and the reacting force between the first rotor 210 and the second rotor 220. For convenience of understanding, an embodiment in which the first rotor 210 is provided with the second circuit element 40 and the second connection member 230 will be described in detail. The second circuit element 40 is electrically connected to the first rotor 210, the first rotor 210 forms an electromagnetic field, the second rotor 220 rotates under the action of the electromagnetic field, the first rotor 210 is subjected to a force equal to and opposite to the second rotor 220, and the first rotor 210 can rotate in a direction opposite to the rotation direction of the second rotor 220.
Because the interaction force between the first rotor 210 and the second rotor 220 is used for driving the first rotor 210 and the second rotor 220 to rotate and apply work, the torsion of the rotor assembly 20 to the motor casing 10 can be reduced, so that the problem of overload of the motor casing 10 can be avoided, the high-power operation of the motor 1 can be realized, and the use performance of the motor 1 can be further improved.
As shown in fig. 1, in some embodiments of the present invention, the outer circumferential wall of the first rotor 210 may be provided with the second connector 230 and the second circuit member 40. The inner peripheral wall of the motor casing 10 is provided with a first connecting member 110. Thus, the distance between the second connection member 230 and the first connection member 110 and the distance between the second connection member 230 and the second circuit element 40 can be reduced, thereby facilitating the electrical connection between the first connection member 110 and the second connection member 230 and the electrical connection between the second circuit element 40 and the second connection member 230.
In some embodiments of the present invention, the first rotor 210 may include multiple sets of windings. The sets of windings correspond to multiple phases with the rotor assembly 20. The second circuit element 40 includes an inverter circuit electrically connected to the second connector 230, the inverter circuit being adapted to be electrically connected to the plurality of sets of windings to drive the rotor assembly 20 to rotate. The inverter circuit can convert the direct current into the alternating current and regularly transmit the alternating current to the multiple sets of windings on the first rotor 210, so that an alternating electromagnetic field is formed on the first rotor 210, and the second rotor 220 can be driven to rotate, and the second rotor 220 simultaneously acts on the reaction force of the first rotor 210 in the rotating process, so that the first rotor 210 also rotates. Thus, the first and second rotors 210 and 220 may be rotated by supplying the ac power to the plurality of sets of windings through the inverter circuit.
In some embodiments of the present invention, the second circuit element 40 may further include a control element electrically connected to the inverter circuit to control on/off of the electrical connection of the inverter circuit to the plurality of sets of windings. For example, the inverter circuit is independent of each other in terms of the electrical connection relationship of the multiple sets of windings, the inverter circuit may provide a controllable alternating current for any one of the multiple sets of windings, the control element may control the power supply condition of the inverter circuit to the multiple sets of windings, so that the second rotor 220 may be continuously driven to rotate by the electromagnetic force, and the first rotor 210 may also be continuously driven to rotate in the opposite direction by the relationship between the acting force and the reaction force.
In some embodiments of the present invention, the control element may include a position signal detection circuit, the position signal detection circuit is disposed on the first rotor 210, and the position signal detection circuit is electrically connected to the inverter circuit for detecting the relative position of the first rotor 210 and the second rotor 220. The position signal detection circuit can monitor the relative position between the second rotor 220 and the first rotor 210 in real time, and control the inverter circuit to supply power to the plurality of sets of windings, so that the second rotor 220 can be driven to rotate continuously by the electromagnetic force, and the first rotor 210 can be driven to rotate continuously.
In some embodiments of the present invention, the position signal detection circuit may be a hall device or a photoelectric encoder. The hall device can achieve position detection through the hall effect. A photoelectric encoder is a sensor that converts mechanical geometric displacement on an output shaft into pulses or digital quantities through photoelectric conversion. The position signal detection circuit can reflect the rotation of the rotor assembly 20 to further control the power supply of the inverter circuit to the plurality of sets of windings. In some examples of the invention, the control elements may include a Microcontroller (MCU), an inverter driving circuit, an auxiliary power supply, and the like. A Microcontroller (MCU) may estimate the relative position between the second rotor 220 and the first rotor 210 based on a software algorithm.
As shown in fig. 1, in some embodiments of the present invention, the first rotor 210 may be connected with the motor case 10 by the first bearing assembly 50. The second rotor 220 may be connected to the first rotor 210 by a second bearing assembly 60. The outer bearing of the first bearing assembly 50 is sleeved inside the motor casing 10 and fixedly connected with the motor casing 10, the inner bearing of the first bearing assembly 50 is sleeved outside the first rotor 210 and fixedly connected with the first rotor 210, and the inner bearing of the first bearing assembly 50 is rotatably connected with the outer bearing of the first bearing assembly 50. The outer bearing of the second bearing assembly 60 is nested within the first rotor 210 and fixedly coupled to the first rotor 210, the inner bearing of the second bearing assembly 60 is nested within the second rotor 220 and fixedly coupled to the second rotor 220, and the inner bearing of the second bearing assembly 60 is rotatably coupled to the outer bearing of the second bearing assembly 60.
Therefore, the first rotor 210 can be rotatably disposed in the motor casing 10 by the first bearing assembly 50, and the second rotor 220 can be rotatably disposed in the first rotor 210 by the second bearing assembly 60, which not only facilitates the installation among the first rotor 210, the second rotor 220 and the motor casing 10, but also reduces the abrasion between the first rotor 210 and the motor casing 10 and the abrasion between the second rotor 220 and the first rotor 210, and further prolongs the service life of the motor 1.
As shown in fig. 1, in some embodiments of the present invention, the first bearing assembly 50 may include two sets, wherein one set of the first bearing assembly 50 is provided at one axial end of the motor casing 10, and the other set of the first bearing assembly 50 is provided at the other axial end of the motor casing 10. Thus, by supporting the first rotor 210 by the two sets of first bearing assemblies 50, not only the mounting stability of the first rotor 210 can be improved, but also the rotational smoothness of the first rotor 210 can be improved.
As shown in fig. 1, according to some embodiments of the present invention, the first connection member 110 may include a first carbon brush 111 and a second carbon brush 112. The first carbon brush 111 is electrically connected to the first circuit element 30, the second carbon brush 112 is spaced apart from the first carbon brush 111, and the second carbon brush 112 is electrically connected to the first circuit element 30. The second connector 230 includes a first slip ring 231 and a second slip ring 232, the first slip ring 231 is electrically connected to the first carbon brush 111, and the rotor assembly 20 is sleeved with the first slip ring 231. The second slip ring 232 and the first slip ring 231 are spaced apart along the axial direction of the rotor assembly 20, the second slip ring 232 is electrically connected to the second carbon brush 112, the rotor assembly 20 is sleeved with the second slip ring 232, the first slip ring 231 is opposite to the first carbon brush 111, and the second slip ring 232 is opposite to the second carbon brush 112.
Thus, the power source, the first carbon brush 111, the first slip ring 231, the second circuit element 40, the rotor assembly 20, the second slip ring 232, and the second carbon brush 112 may form a complete circuit, and the dashed arrows in fig. 1 are current flow paths. By using the connection between the carbon brush and the slip ring, the electrical connection relationship between the first connection member 110 and the second connection member 230 can be realized during the rotation of the rotor assembly 20, and the connection structure is simple and the electrical connection reliability is high.
The motor 1 according to an embodiment of the present invention is described in detail below with reference to fig. 1. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting.
As shown in fig. 1, the motor 1 according to the embodiment of the present invention includes a motor case 10, a rotor assembly 20, a first connector 110, a second connector 230, two first bearing assemblies 50, two second bearing assemblies 60, a first circuit member 30, and a second circuit member 40.
Specifically, as shown in fig. 1, the rotor assembly 20 includes a first rotor 210 and a second rotor 220. The motor case 10 has a first through passage 100. Both first bearing assemblies 50 are located in the first through passage 100, and the two first bearing assemblies 50 are arranged at intervals along the axial direction of the motor casing 10. The outer bearing of each first bearing assembly 50 is fixedly connected to the inner circumferential wall of the motor casing 10. The first rotor 210 is located in the first through channel 100, two ends of the first rotor 210 respectively penetrate through the two first bearing assemblies 50, and inner bearings of the two first bearing assemblies 50 are fixedly connected with an outer peripheral wall of the first rotor 210. The inner bearing of the first bearing assembly 50 is rotatable relative to the outer bearing of the first bearing assembly 50 and the first rotor 210 is rotatable relative to the motor casing 10.
As shown in fig. 1, the first rotor 210 has a second through passage 211. Both of the second bearing units 60 are located in the second through passage 211, and the two second bearing units 60 are arranged at intervals in the axial direction of the first rotor 210. The outer bearing of each second bearing assembly 60 is fixedly coupled to the inner circumferential wall of the first rotor 210. The second rotor 220 is located in the second through channel 211, two ends of the second rotor 220 are respectively disposed through the two second bearing assemblies 60, and inner bearings of the two second bearing assemblies 60 are fixedly connected to an outer peripheral wall of the second rotor 220. The inner bearing of the second bearing assembly 60 is rotatable relative to the outer bearing of the second bearing assembly 60 and the second rotor 220 is rotatable relative to the first rotor 210.
The first circuit element 30 is a circuit board provided with a rectifying circuit. Two or three input end alternating current contacts, an output end positive electrode contact and an output end negative electrode contact can be formed on the circuit board provided with the rectifying circuit. The first circuit element 30 is provided on the outer peripheral wall of the motor case 10. The first circuit element 30 is located at one end in the axial direction of the motor case 10. Two or three input ac contacts on the first circuit element 30 may each be electrically connected to an ac power grid. The rectifier circuit may rectify the grid ac power to form dc power. The first connecting member 110 is provided on an inner circumferential wall of the motor case 10. The first connection member 110 is disposed adjacent to the first circuit element 30. The first connection member 110 may include a first carbon brush 111 and a second carbon brush 112. The first carbon brushes 111 and the second carbon brushes 112 are arranged at intervals. The first carbon brush 111 may be electrically connected to the output terminal positive contact of the first circuit element 30, and the second carbon brush 112 may be electrically connected to the output terminal negative contact of the first circuit element 30. Thereby, the direct current can be guided to the first connector 110.
As shown in fig. 1, the second connecting member 230 includes a first slip ring 231 and a second slip ring 232, and the first slip ring 231 and the second slip ring 232 are sleeved on the first rotor 210 and are fixedly connected to the first rotor 210. The first slip ring 231 is opposite to the first carbon brush 111, and the first carbon brush 111 can abut against the first slip ring 231 to electrically connect the first carbon brush 111 and the first slip ring 231. The second slip ring 232 is opposite to the second carbon brush 112, and the second carbon brush 112 can abut against the second slip ring 232 to electrically connect the second carbon brush 112 and the second slip ring 232. Thereby, the direct current can be guided to the second connector 230.
As shown in fig. 1, the second circuit member 40 is provided at the outer circumferential wall of the first rotor 210, the second circuit member 40 is electrically connected to the second connector 230, and the second connector 230 may supply a direct current to the second circuit member 40 to operate the second circuit member 40. The second circuit element 40 is a circuit board provided with an inverter circuit and a position signal detection circuit. The inverter circuit is electrically connected to the sets of winding coils on the first rotor 210.
The inverter circuit may convert the direct current into an alternating current and regularly deliver the alternating current to the sets of windings on the first rotor 210 such that the first rotor 210 forms an alternating electromagnetic field. The second rotor 220 may rotate under the action of the electromagnetic field, and the second rotor 220 may simultaneously provide a reaction force to the first rotor 210 during the rotation, so that the first rotor 210 also rotates. The position signal detection circuit can monitor the relative position between the second rotor 220 and the first rotor 210 in real time, and control the power supply condition of the inverter circuit to the multiple sets of windings, so that the second rotor 220 can be continuously driven by electromagnetic force, and the second rotor 220 can be continuously rotated.
In the related art, a rectifying circuit and an inverter circuit are located on the same circuit board and are respectively connected to an alternating current power grid and a counter-rotating motor. The power supply of each phase of the counter-rotating motor is realized through the slip ring, along with the increase of the number of phases of the motor, the number of the slip rings and the carbon brushes thereof can be increased, so that the axial length of the whole motor is increased, and the motor is overlarge in size. And because there are more phases, the electric wire also increases, need to put in order more outlet wires with the buncher or other modes. In addition, the complexity of the motor manufacturing and processing process is increased, and the cost of the whole motor is increased. For a high-power motor, the safety distance between the slip rings is increased, and the axial length of the motor is further increased. When the inverter circuit of the motor control board is electrified, a large amount of heat is generated, and a cooling fin or a fan is needed to cool the inverter circuit.
The motor 1 according to the embodiment of the present invention is implemented by redesigning the circuit board in the related art, and implementing the rectifier circuit and the inverter circuit integrated on one circuit board in the related art by two circuit boards, in which the rectifier circuit is provided as an independent circuit board in the motor case 10, and the inverter circuit is provided as an independent circuit board in the first rotor 210 and rotates with the first rotor 210. Only the electrical connection between the motor case 10 and the first rotor 210 needs to be achieved to transmit the direct current formed by the rectifying circuit to the inverter circuit. Therefore, the number of the slip rings and the carbon brushes of the motor 1 can be reduced, the design and the manufacture of the motor 1 are more convenient, the production cost of the motor 1 is saved, the whole size of the motor 1 is reduced, meanwhile, heat generated in the working process of the inverter circuit and the position signal detection circuit can be well dissipated, and the heat dissipation circuit of the motor 1 can be reduced or omitted. In addition, the circuit board provided with the inverter circuit may be provided with a position signal detection circuit. The position signal detection circuit can accurately measure the relative position signal between the first rotor 210 and the second rotor 220, so that the control accuracy of the motor 1 can be improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An electric machine, comprising:
the motor comprises a motor shell, a first connecting piece and a second connecting piece, wherein the motor shell is provided with a first through channel;
the rotor assembly penetrates through the first through channel and is rotatably connected with the motor shell, and a second connecting piece is arranged on the rotor assembly and is electrically connected with the first connecting piece;
the first circuit element is suitable for being electrically connected with a power supply, the first circuit element is arranged on the motor shell, and the first circuit element is electrically connected with the first connecting piece;
and the second circuit element is suitable for controlling the rotor assembly to rotate, is arranged on the rotor assembly and is electrically connected with the second connecting piece.
2. The electric machine of claim 1, wherein the rotor assembly comprises:
the first rotor is arranged in the first through channel in a penetrating mode, the first rotor is rotatably connected with the motor shell, and the first rotor is provided with a second through channel;
the second rotor is arranged in the second through channel in a penetrating mode, is rotatably connected with the first rotor, and is opposite to the rotating direction of the first rotor in rotating direction;
the first rotor is provided with the second circuit element and a second connection member, the second circuit element being electrically connected to the first rotor provided with the second circuit element.
3. The electric machine according to claim 2, wherein the outer peripheral wall of the first rotor is provided with the second connector and the second circuit member;
the internal perisporium of motor casing is equipped with first connecting piece.
4. The electric machine of claim 3, wherein the first rotor comprises a plurality of sets of windings;
the second circuit element includes:
and the inverter circuit is electrically connected with the second connecting piece and is suitable for being electrically connected with the plurality of groups of windings so as to drive the rotor assembly to rotate.
5. The electric machine of claim 4, wherein the second circuit element further comprises:
and the control element is electrically connected with the inverter circuit so as to control the on-off of the electrical connection between the inverter circuit and the plurality of groups of windings.
6. The electric machine of claim 5, wherein the control element comprises a position signal detection circuit disposed on the first rotor, the position signal detection circuit being electrically connected to the inverter circuit for detecting the relative position of the first rotor and the second rotor.
7. The motor of claim 6, wherein the position signal detection circuit is a Hall device or a photoelectric encoder.
8. The electric machine of claim 2 wherein the first rotor is connected to the motor casing by a first bearing assembly;
the second rotor is connected to the first rotor by a second bearing assembly.
9. The motor of claim 8 wherein said first bearing assembly comprises two sets, one set being disposed at one axial end of said motor housing and the other set being disposed at the other axial end of said motor housing.
10. The electric machine of claim 1, wherein the first connector comprises:
a first carbon brush electrically connected to the first circuit element;
a second carbon brush spaced apart from the first carbon brush, the second carbon brush electrically connected to the first circuit element;
the second connector includes:
the first slip ring is electrically connected with the first carbon brush and sleeved on the rotor assembly;
the second slip ring and the first slip ring are spaced apart along the axis direction of the rotor assembly, the second slip ring is electrically connected with the second carbon brush, the rotor assembly is sleeved with the second slip ring, the first slip ring is opposite to the first carbon brush, and the second slip ring is opposite to the second carbon brush.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811119701.1A CN110943587A (en) | 2018-09-25 | 2018-09-25 | Electric machine |
| PCT/CN2018/122678 WO2020062638A1 (en) | 2018-09-25 | 2018-12-21 | Motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811119701.1A CN110943587A (en) | 2018-09-25 | 2018-09-25 | Electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110943587A true CN110943587A (en) | 2020-03-31 |
Family
ID=69905173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811119701.1A Pending CN110943587A (en) | 2018-09-25 | 2018-09-25 | Electric machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110943587A (en) |
| WO (1) | WO2020062638A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021242117A1 (en) * | 2020-05-29 | 2021-12-02 | Alva Industries As | Dual propeller counter-rotating aerial propulsion system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035211A (en) * | 1988-09-13 | 1989-08-30 | 曾剑良 | Double-rotor machine |
| CN1094866A (en) * | 1993-05-08 | 1994-11-09 | 苏卫星 | Two-directional rotation electric generator |
| CN200952448Y (en) * | 2006-09-30 | 2007-09-26 | 席风春 | Bidirectional rotary double-path power generating water-wheel generator |
| CN103078457A (en) * | 2012-12-27 | 2013-05-01 | 上海交通大学 | Double-rotor synchronous motor with two electric brushes and permanent magnets on inner circle and without stator |
| CN103475160A (en) * | 2013-09-01 | 2013-12-25 | 张睿强 | Coaxial disrotatory motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202978637U (en) * | 2012-11-05 | 2013-06-05 | 贵州航天林泉电机有限公司 | Double-direction rotation structure brushless motor |
| CN204810084U (en) * | 2015-08-24 | 2015-11-25 | 苏卫星 | Totally closed horizontal birotor power generating equipment |
-
2018
- 2018-09-25 CN CN201811119701.1A patent/CN110943587A/en active Pending
- 2018-12-21 WO PCT/CN2018/122678 patent/WO2020062638A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035211A (en) * | 1988-09-13 | 1989-08-30 | 曾剑良 | Double-rotor machine |
| CN1094866A (en) * | 1993-05-08 | 1994-11-09 | 苏卫星 | Two-directional rotation electric generator |
| CN200952448Y (en) * | 2006-09-30 | 2007-09-26 | 席风春 | Bidirectional rotary double-path power generating water-wheel generator |
| CN103078457A (en) * | 2012-12-27 | 2013-05-01 | 上海交通大学 | Double-rotor synchronous motor with two electric brushes and permanent magnets on inner circle and without stator |
| CN103475160A (en) * | 2013-09-01 | 2013-12-25 | 张睿强 | Coaxial disrotatory motor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020062638A1 (en) | 2020-04-02 |
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Application publication date: 20200331 |