CN-111769676-B - Winding structure of motor for electric vehicle

Abstract

The invention relates to a winding structure of a motor for an electric vehicle, which comprises a stator, wherein the stator comprises tooth bars, tooth grooves and windings, the windings are wound on the tooth bars in a clockwise or anticlockwise direction, the windings on the same tooth bar are wound in batches, the winding directions of the windings on the same tooth bar are the same, and the windings on the same tooth bar are connected in series. The winding structure of the invention has the beneficial effects that the conductor wire diameter of the motor winding is increased, the windings on the same tooth are wound in batches, so that the crowded position of a copper wire is effectively avoided, meanwhile, the idle tooth space is utilized, the slot filling rate is greatly improved, the current carrying capacity of the motor is improved, the copper consumption is reduced, the motor efficiency is improved, and the output torque and the endurance mileage are increased.

Inventors

• WANG JIAXU
• ZHANG ZHONG
• WANG JIAN

Assignees

• 台州市金宇机电有限公司

Dates

Publication Date

20260505

Application Date

20200519

Claims (7)

1. 1. The winding structure of the motor for the electric vehicle comprises a stator, wherein the stator comprises tooth bars, tooth grooves and windings, and is characterized in that the windings are wound on the tooth bars in a clockwise or anticlockwise direction, the windings on the same tooth bar are wound in a plurality of batches, the winding directions of the windings on the same tooth bar are the same, the windings on the same tooth bar are connected in series, the windings form unit windings by the windings on the tooth bars, the windings in the unit windings are connected in series, the stator is formed by the unit windings, the unit windings are connected in series or in parallel, the windings in at least one tooth bar are separated by the windings on any other tooth bar in the unit winding, and the windings are arranged in layers by single wire or are arranged in layers by multiple wires.
2. 2. The winding structure of an electric motor for an electric vehicle according to claim 1, wherein the stator has 27 slots and is formed by winding on 3 teeth bars as a unit winding, 36 slots and is formed by winding on 3 teeth bars as a unit winding, 45 slots and is formed by winding on 3 teeth bars as a unit winding, 48 slots and is formed by winding on 4 teeth bars as a unit winding, 54 slots and is formed by winding on 3 teeth bars as a unit winding, or 63 slots and is formed by winding on 3 teeth bars as a unit winding.
3. 3. The winding structure of the motor for the electric vehicle according to claim 2, wherein the single conductor wire diameter of the winding is 0.3 mm-3.3 mm.
4. 4. The winding structure of an electric motor for an electric vehicle according to claim 3, wherein winding directions of said windings on adjacent ones of the ribs in the same one of said unit windings are opposite.
5. 5. The winding structure of the electric motor car motor according to claim 4, wherein the number of winding turns between each batch of the windings on each tooth bar in the unit winding is arbitrary and the sequence is arbitrary.
6. 6. An electric motor for an electric vehicle, characterized by comprising the winding structure of the electric motor for an electric vehicle according to any one of claims 1 to 5.
7. 7. An electric vehicle comprising the electric motor according to claim 6.

Description

Winding structure of motor for electric vehicle Technical Field The invention relates to the technical field of electric vehicles, in particular to a winding structure of a motor for an electric vehicle. Background With the encouragement of national policies and the importance of human society development to environmental problems, the greenhouse effect is slowed down, and electric vehicles as green pollution-free environment-friendly vehicles have become an indispensable part of people's daily life. The motor is used as a core component of the electric vehicle, and the quality of the performance of the motor directly influences the personal safety and the use comfort of consumers. Most of the existing electric motor for the electric motor adopts a hub type motor, the number of pole slots is more, fractional slots are adopted for improving the utilization rate of copper wires of stator windings of the motor, most of the existing winding structure is a fractional slot concentrated winding, the winding on each tooth can only be wound with the number of turns required for the straight at one time, the winding of the next tooth is performed, the larger diameter of the hub motor causes larger outer diameter of the stator, the wider the outer tooth slots of the stator are inevitably caused, the narrower the center tooth slots are inevitably caused, the winding structure is extremely crowded at the root parts of the tooth slots, friction and rolling are inevitably generated between conductors, the turn-to-turn and pressure-proof probability of the stator winding is greatly improved, and due to the limitation of the root parts of the tooth slots, the utilization rate of the tooth slots is limited, the notch part is extremely wide and cannot be wound with full, the area of idle tooth slots is larger, therefore, the winding structure of the one-time winding of the tooth slots of the existing motor is sequentially narrow in the outer width and inner width, the current overload capacity of the winding is limited, the efficiency and the torque of the motor is not high, the copper loss is high, and the temperature rise of the motor is high. Therefore, those skilled in the art are devoted to developing a winding structure of a motor for an electric vehicle, improving the slot filling rate and the product production qualification rate of the stator winding of the motor, improving the efficiency and the output torque of the motor, reducing the temperature rise of the motor, improving the overload capacity and the power density of the motor, realizing the industrial automatic winding of the winding, and improving the production efficiency. Solving the difficult problem in the prior art and achieving the aim is the creative and research machine of the invention. Disclosure of Invention In view of the above-mentioned drawbacks of the prior art, the technical problems to be solved by the present invention are: 1. The motor for the electric vehicle has larger outer diameter, the tooth slot of the stator has wide outside and narrow inside, the winding structure is located at the bottom of the slot and is crowded, the slot opening is more in idle space, and the full rate of the stator winding slot is low. 2. The number of slots of the motor for the electric vehicle is large, so that the waste of winding ends is reduced, the sine characteristic of the back electromotive force waveform of the motor is improved, the winding is concentrated by fractional slots, the winding on each tooth is formed at one time, and the inter-tooth follows the sequential winding in the overline direction. 3. The crowding degree of the winding at the bottom of the stator tooth slot is high, the conductor insulating layer is easy to be extruded and rubbed, the turn-to-turn voltage-withstand failure is high, and the qualification rate of the stator winding cannot be ensured. 4. The sectional area of the stator winding is small, the overload capacity to current is low, the power density of the motor is low, the copper loss of the motor is high, the temperature rise of the motor is high, and the efficiency is low. 5. The stator slot number is many, and motor parallel connection rule is complicated, and easily makeing mistakes, unable assurance doubling qualification rate. In order to achieve the above purpose, the invention provides a winding structure of a motor for an electric vehicle, which has the technical scheme that: The winding structure of the motor for the electric vehicle comprises a stator, wherein the stator comprises tooth bars, tooth grooves and windings, and is characterized in that the windings are wound on the tooth bars in a clockwise or anticlockwise direction, the windings on the same tooth bar are wound in batches, the winding directions of the windings on the same tooth bar are the same, and the windings on the same tooth bar are connected in series. According to the design scheme, winding components on the same tooth bar are distribute