CN117254741A - Variable speed motor circuit - Google Patents
Variable speed motor circuit Download PDFInfo
- Publication number
- CN117254741A CN117254741A CN202311069929.5A CN202311069929A CN117254741A CN 117254741 A CN117254741 A CN 117254741A CN 202311069929 A CN202311069929 A CN 202311069929A CN 117254741 A CN117254741 A CN 117254741A
- Authority
- CN
- China
- Prior art keywords
- coil
- change
- over switch
- variable speed
- speed motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000605 extraction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
- H02P25/184—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays wherein the motor speed is changed by switching from a delta to a star, e.g. wye, connection of its windings, or vice versa
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a variable speed motor circuit, wherein a change-over switch is positioned at one side of a coil, a tap end is arranged on the coil, one end of the change-over switch is connected with a motor controller, and the other end of the change-over switch is toggled back at the head end or the tap end of the coil.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a variable speed motor circuit.
Background
The new energy automobile is directly driven by the motor, so the motor needs to be matched with the high-low speed state in the running process of the automobile. After the total power of the motor is determined, the maximum torque and the maximum rotating speed of the motor are also determined, the reverse electromotive force of the motor is increased along with the increment of the rotating speed, the current is reduced, the torsion is correspondingly reduced, and when the reverse electromotive force reaches a certain balance with the power supply voltage after the motor reaches a certain speed, the rotating speed is not increased, and the maximum rotating speed of the motor is reached at the moment. When the vehicle speed ratio is determined, the highest speed of the vehicle is determined. When the motor power is determined, the maximum speed is reduced if the initial torque is increased. If both are to be improved, only the motor power can be increased (or a gearbox is added to a transmission system), which increases the manufacturing cost, and the conversion efficiency of the high-speed motor at the time of low rotation speed and large torsion cannot be considered.
Therefore, a motor circuit is urgently needed to solve the above-described problems.
Disclosure of Invention
The present invention aims to overcome the above-mentioned disadvantages of the background art, and provides a variable speed motor circuit, which increases the torque and the rotation speed.
The invention is implemented by the following technical scheme: a variable speed motor circuit comprises a change-over switch and a coil, wherein the change-over switch is positioned at one side of the coil, a tap end is arranged on the coil,
one end of the change-over switch is connected with the motor controller, and the other end of the change-over switch is poked back at the head end or the tap end of the coil.
In the technical scheme, the method comprises the following steps: the three transfer switches are respectively positioned at one side of each coil and can be toggled back at the head end or the tap end of the coil.
In the technical scheme, the method comprises the following steps: the change-over switch comprises a first change-over switch, a second change-over switch and a third change-over switch,
the coil comprises a first coil, a second coil and a third coil, wherein the middle parts of the first coil, the second coil and the third coil are respectively provided with a tap end,
the first change-over switch is connected with the first coil tap end, the second change-over switch is connected with the second coil tap end, and the third change-over switch is connected with the third coil tap end.
In the technical scheme, the method comprises the following steps: the first change-over switch is connected with the joint end of the first coil, the second change-over switch is connected with the joint end of the second coil, and the third change-over switch is connected with the joint end of the third coil.
In the technical scheme, the method comprises the following steps: the first coil, the second coil and the third coil are connected in a Y-shaped mode.
In the technical scheme, the method comprises the following steps: the number of the extraction ends on the first coil, the second coil and the third coil is kept consistent.
In the technical scheme, the method comprises the following steps: and the joints of the first change-over switch, the second change-over switch and the third change-over switch are connected with the three-phase output end of the motor controller.
In the technical scheme, the method comprises the following steps: the coil is a coil of a permanent magnet driving motor.
The invention has the following advantages: 1. the invention changes the output torque and the rotating speed of the motor through controlling the change-over switch.
2. When the first, second and third transfer switches are communicated with the first coil head, the second coil head and the third coil head ports, the other end of the transfer switch is connected with the motor controller, the motor uses a large coil group, the output torque of the motor is large, the rated rotation speed is low, when the electric vehicle runs at a certain speed, the motor increases due to the increase of the rotation speed, the reverse electromotive force increases, the input current of the motor controller becomes smaller, and the torque is smaller, so that the speed of the vehicle can not be increased any more.
3. In order to increase the output rotating speed, the switching of the transfer switches is controlled, so that the first transfer switch is connected to the first coil, the second transfer switch is connected to the second coil, the third transfer switch is connected to the third coil, the motor uses a short coil, at the moment, the back electromotive force in the first coil, the second coil and the third coil is only half of that in the original state, the output current of the motor controller is increased, the torsion is increased, and the rotating speed is increased.
Drawings
Fig. 1 is a circuit schematic of the present invention.
In the figure: a first coil 1, a second coil 2, a third coil 3, a first change-over switch 4, a second change-over switch 5, a third change-over switch 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. Embodiments of the present invention are intended to be within the scope of the present invention as defined by the appended claims.
Referring to fig. 1, it is shown that: a variable speed motor circuit comprises a change-over switch and a coil, wherein the change-over switch is positioned at one side of the coil, a tap end is arranged on the coil,
one end of the change-over switch is connected with the motor controller, and the other end of the change-over switch is poked back at the head end or the tap end of the coil.
The three transfer switches are respectively positioned at one side of each coil and can be toggled back at the head end or the tap end of the coil.
The change-over switch comprises a first change-over switch 4, a second change-over switch 5 and a third change-over switch 6,
the coil comprises a first coil 1, a second coil 2 and a third coil 3, wherein the middle parts of the first coil and the second coil are respectively provided with a tap end,
the first change-over switch 4 is connected with the tap end of the first coil 1, the second change-over switch 5 is connected with the tap end of the second coil 2, and the third change-over switch 6 is connected with the tap end of the third coil 3.
The first transfer switch 4 is connected with the joint end of the first coil 1, the second transfer switch 5 is connected with the joint end of the second coil 2, and the third transfer switch 6 is connected with the joint end of the third coil 3.
The first coil 1, the second coil 2 and the third coil 3 are connected in a Y-star shape.
The number of the tap ends on the first coil 1, the second coil 2 and the third coil 3 is kept consistent.
The joints of the first change-over switch 4, the second change-over switch 5 and the third change-over switch 6 are connected with the three-phase output end of the motor controller. The output current of the motor controller is increased, so that the torque force is increased, and the rotating speed is improved. The variable speed motor improves the electric energy conversion rate of the motor under the condition of ensuring the torque and the speed.
Examples: as shown in fig. 1, the ends of the first coil 1, the second coil 2 and the third coil 3 are connected together to form a center point, and a Y-star connection is formed between the first coil 1, the second coil 2 and the third coil 3.
One end joints of the first transfer switch 4, the second transfer switch 5 and the third transfer switch 6 are directly connected with the three-phase output of the motor controller.
The specific number of turns of the above windings is determined according to the required load, the first coil 1, the second coil 2, the third coil 3 (i.e. the center tap of the coil). The number of turns of the windings is equal, so that the electromotive force of each coil can be balanced, and the motor can be controlled conveniently.
The invention relates to a variable speed motor circuit, when a first change-over switch 4, a second change-over switch 5 and a third change-over switch 6 are respectively connected with the first coil 1, the second coil 2 and the third coil 3,
the motor uses a large coil group, and the motor has large output torque and low rated rotation speed. When the electric vehicle runs to a certain speed, the motor increases the reverse electromotive force due to the increase of the rotating speed, the input current of the motor controller becomes smaller, and the torque force becomes smaller at the same time, so that the speed of the vehicle cannot be increased any more;
when the switching of the first changeover switch 4, the second changeover switch 5 and the third changeover switch 6 is controlled so that the first changeover switch 4, the second changeover switch 5 and the third changeover switch 6 are connected with the first coil 1, the second coil 2 and the third coil 3 respectively in order to increase the output rotation speed,
the motor uses the short coil, and the back electromotive force in the first coil 1, the second coil 2 and the third coil 3 only uses half of the original back electromotive force at the moment, and the output current of the motor controller is increased, so that the torsion is increased, and the rotating speed is increased. The variable speed motor improves the electric energy conversion rate of the motor under the condition of ensuring the torque and the speed. In order to achieve the purpose, the variable speed motor designed by the invention has the advantages that three groups of wires of the coil stator of the original permanent magnet driving motor can be normally driven to form three groups of 9 joints of the coil only by a certain tap ratio in the middle tap.
The parts not described in detail above are all prior art.
Claims (8)
1. A variable speed motor circuit comprising a change-over switch and a coil, characterized in that: the change-over switch is positioned at one side of the coil, the coil is provided with a tap end,
one end of the change-over switch is connected with the motor controller, and the other end of the change-over switch is poked back at the head end or the tap end of the coil.
2. A variable speed motor circuit as claimed in claim 1, wherein: the three transfer switches are respectively positioned at one side of each coil and can be toggled back at the head end or the tap end of the coil.
3. A variable speed motor circuit as claimed in claim 2, wherein: the change-over switch comprises a first change-over switch (4), a second change-over switch (5) and a third change-over switch (6),
the coil comprises a first coil (1), a second coil (2) and a third coil (3), wherein the middle parts of the first coil and the second coil are respectively provided with a tap end,
the first change-over switch (4) is connected with the tap end of the first coil (1), the second change-over switch (5) is connected with the tap end of the second coil (2), and the third change-over switch (6) is connected with the tap end of the third coil (3).
4. A variable speed motor circuit as claimed in claim 3, wherein: the first change-over switch (4) is connected with the joint end of the first coil (1), the second change-over switch (5) is connected with the joint end of the second coil (2), and the third change-over switch (6) is connected with the joint end of the third coil (3).
5. A variable speed motor circuit as claimed in claim 3 or 4, wherein: the first coil (1), the second coil (2) and the third coil (3) are connected in a Y star shape.
6. A variable speed motor circuit as claimed in claim 5, wherein: the number of the extraction ends on the first coil (1), the second coil (2) and the third coil (3) is kept consistent.
7. A variable speed motor circuit as claimed in claim 5, wherein: and connectors of the first change-over switch (4), the second change-over switch (5) and the third change-over switch (6) are connected with a three-phase output end of the motor controller.
8. A variable speed motor circuit as claimed in claim 1, wherein: the coil is a coil of a permanent magnet driving motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311069929.5A CN117254741A (en) | 2023-08-24 | 2023-08-24 | Variable speed motor circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311069929.5A CN117254741A (en) | 2023-08-24 | 2023-08-24 | Variable speed motor circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117254741A true CN117254741A (en) | 2023-12-19 |
Family
ID=89132147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311069929.5A Pending CN117254741A (en) | 2023-08-24 | 2023-08-24 | Variable speed motor circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117254741A (en) |
-
2023
- 2023-08-24 CN CN202311069929.5A patent/CN117254741A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103684196A (en) | Permanent magnet synchronous motor driving system capable of switching winding | |
| CN110365132B (en) | Variable branch modular permanent magnet built-in outer rotor hub motor for electric automobile | |
| CN111342736B (en) | Variable winding driving system of switched reluctance motor and online soft switching method | |
| CN105048925A (en) | Switching strategy based on switching device of permanent magnet synchronous motor windings | |
| EP0923192B1 (en) | Induction motor | |
| CN105048888A (en) | Switching device of permanent magnet synchronous motor windings | |
| US20100148717A1 (en) | Asynchronous AC induction electrical machines in cross-interlockingly parallel connection | |
| CN113746398B (en) | Switch reluctance gear-shifting motor | |
| CN108715140B (en) | Electronic gear shifting system adopting variable winding permanent magnet synchronous motor | |
| CN2452199Y (en) | Large low-speed torque permasyn motor | |
| CN108880047B (en) | Permanent magnet motor and control method and system for same | |
| CN105871290A (en) | Series connection and parallel connection switching device for windings of novel permanent magnet synchronous motor | |
| CN117254741A (en) | Variable speed motor circuit | |
| CN106655968A (en) | Automatic shift system based on AC motor, and AC motor | |
| CN207124507U (en) | A kind of inexpensive winding switch motor | |
| CN208112355U (en) | A kind of three-phase motor winding change-over switch | |
| CN112693308A (en) | Built-in differential mechanism of new energy automobile motor | |
| CN210309773U (en) | Integral drive rear axle of electric automobile | |
| US8203303B2 (en) | Asynchronous AC induction electrical machines in cross-interlockingly parallel connection | |
| CN219107163U (en) | Multi-winding motor, power assembly and electric vehicle | |
| CN101340133B (en) | Asymmetric 6 phase permanent-magnet brushless DC motor | |
| CN1005229B (en) | Switching-type magnetoresistance motor with four phase four line connection | |
| KR102111851B1 (en) | Stator Winding Circuit and Saliency Electric Motor Including the Stator Winding Circuit | |
| CN210760283U (en) | Two grades of bi-motor control system | |
| CN210526279U (en) | Small-power jump electric automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |