CN106374708A

CN106374708A - High-speed asynchronous motor rotor for electric vehicles

Info

Publication number: CN106374708A
Application number: CN201611023107.3A
Authority: CN
Inventors: 梁昌勇; 龙溪凯; 殷进省; 陈国弟
Original assignee: Hepu Power Co ltd
Current assignee: Hepu Power Co ltd
Priority date: 2016-11-21
Filing date: 2016-11-21
Publication date: 2017-02-01

Abstract

A high-speed asynchronous motor for electric vehicles comprises a closed case, a stator arranged on the inner wall of the closed case, and a rotor arranged in the middle of the stator. The shafts at the two ends of the rotor are connected to bearings at the two ends inside the case in a penetrating manner, and pass through the case. The motor is characterized in that the rotor is composed of a rotor core, a plurality of conducting bars evenly distributed around the rotor core and end rings disposed at the two ends of the rotor core; the conducting bars are longitudinally arranged inside toothed slots of the rotor core; the two end rings are respectively arranged at the two ends of the rotor core and connected with the two ends of the conducting bars; and the conducting bars and the end rings are connected with the rotor core as a whole by means of aluminum casting. Compared with the prior art, the following advantages are achieved: the material consumption of the cast aluminum rotor is reduced, the wind resistance of the rotor is reduced, the wind friction loss is reduced, and the efficiency of the motor is improved.

Description

A kind of high speed asynchronous motor rotor used for electric vehicle

Technical field

The present invention relates to the technical field of motor..

Background technology

Current motor in electric automobile asynchronous machine cast-aluminum rotor, is all generally to be turned using traditional AC induction motor Minor structure, rotor tip carries centrifugeblade c, blade c radial arrangement, and during work, the rotation with radial blade c produces radially Air-flow radiates to motor stator End winding, sees Fig. 1 structure, air-flow radially flows, shown in figure arrow, the electricity of this kind of structure Machine, when 3000rpm turns following ordinary rotational speed, is the effect that can play radiating, but, up to 6000rpm turn with During upper high speed rotating speed, by being determined by use occasion, degree of protection is commonly ip67, and the rotor of motor, stator all have to It is enclosed in compact casing, inner air circulating load is limited, so, when up to 6000rpm turns above high speed rotating speed, at a high speed The air-flow of the blade c institute disturbance rotating can produce extremely strong wind moussing loss on the contrary and produce obvious temperature rise, not only tight in closing In the casing gathered, produced intensification of wind moussing loss is more than the reduced temperature of radiating on the contrary, lead to motor operation temperature notable on Rise, heating is more serious, but also can increase the loss of electric machine, efficiency reduces.

Content of the invention

The goal of the invention of the present invention is to provide and a kind of reduce rotor windage, reduces wind moussing loss, lifting motor efficiency High rotating speed motor in electric automobile asynchronous machine.

The object of the invention is realized in: includes the casing closed, the stator being arranged on the casing inner wall of closing, sets Put the rotor in portion in the stator, two ends of rotor axle is worn and is connected on the bearing at two ends in casing, and passes outside casing, its special feature It is rotor by rotor core, along the equally distributed some slivers of rotor core surrounding, the end ring structure positioned at rotor core two ends Become, sliver is longitudinally arranged inside the teeth groove unshakable in one's determination of rotor core, two end ring be arranged in rotor core two ends and respectively with The two ends of sliver connect, and sliver, end ring aluminium are connected in one using casting method and rotor core.

Sliver, end ring form rotor cage, in high-speed rotation, will not produce wind at high speeds as the blade of prior art Abrasion consumes and produces obvious temperature rise, it is thus achieved that reducing cast-aluminum rotor material consumption, reducing rotor windage, reduce wind abrasion Consumption, the purpose of lifting motor efficiency.

Beneficial effect

1. compared with traditional cast-aluminum rotor, end ring eliminates fan blade, simplify aluminum process, save material, reduce into This；

2., due to not having the presence of fan blade, during rotor operating, windage greatly reduces, thus reducing the loss of electric machine, improve motor Efficiency.

Brief description

Fig. 1 is structure chart in motor for traditional cast-aluminum rotor

Fig. 2 is the structural representation of the present invention.

Fig. 3 is the sectional view of Fig. 2

In figure number explanation: 1. rotor core, 1a, teeth groove unshakable in one's determination, 2. sliver, 3. end ring, a, casing, b, rotor, d, stator, e, Bearing.

Specific embodiment

The invention will be further described with reference to the accompanying drawings and examples

As shown in Figure 1, 2, 3, the object of the invention is realized in: includes casing a of closing, is arranged in casing a of closing Stator d on wall, it is arranged on rotor b in the middle part of stator d, rotor b two end axles are worn on the bearing e being connected on two ends in casing a, and wear Go out outside casing a, its be particular in that rotor b by rotor core 1, along the equally distributed some slivers 2 of rotor core 1 surrounding, End ring 3 positioned at rotor core 1 two ends is constituted, as shown in figure 3, sliver 2 is longitudinally arranged in the teeth groove 1a unshakable in one's determination of rotor core 1 Portion, two ends 3 ring is arranged in rotor core 1 two ends and is connected with the two ends of sliver 2 respectively, and sliver 2, end ring 3 are adopted with aluminium It is connected in one with rotor core 1 with casting method.

Claims

1. a kind of high rotating speed motor in electric automobile asynchronous machine, including the casing of closing, is arranged on the casing inner wall of closing Stator, be arranged on rotor in the middle part of stator, two ends of rotor axle is worn and is connected on the bearing at two ends in casing, and passes outside casing, It is characterized in that rotor is by rotor core, along the equally distributed some slivers of rotor core surrounding, positioned at rotor core two ends End ring is constituted, and sliver is longitudinally arranged inside the teeth groove unshakable in one's determination of rotor core, and two end ring are arranged in rotor core two ends simultaneously It is connected with the two ends of sliver respectively, sliver, end ring aluminium are connected in one using casting method and rotor core.