CN203104167U

CN203104167U - Fully-enclosed alternating-current motor

Info

Publication number: CN203104167U
Application number: CN2013201224015U
Authority: CN
Inventors: 霍向飞; 梁培志; 贾晓红; 李文科; 张彩霞; 陈培生
Original assignee: Yongji Xinshisu Electric Equipment Co Ltd
Current assignee: CRRC Yongji Electric Co Ltd
Priority date: 2013-03-18
Filing date: 2013-03-18
Publication date: 2013-07-31
Anticipated expiration: 2023-03-18

Abstract

The utility model relates to an automobile motor, especially relates to a traction motor for an electric automobile, and in particular relates to a fully-enclosed alternating-current motor which solves the problems that an existing traction motor cannot well meet the electric automobile use requirements. The fully-enclosed alternating-current motor comprises a fully-enclosed housing composed of an end cover with a bearing cap, and a base, wherein the end cover is a cast aluminum end cover; the base is a cast aluminum base; and a spiral cooling water pipe is also cast in the cast aluminum base. According to the utility model, both the motor base and the end cover are made of a cast aluminum material, and thus the weight of the motor is greatly reduced compared with a motor made of a steel plate; and as the spiral cooling water pipe is also cast in the cast aluminum base, the cooling and heat-dissipating capacity of the motor is improved. According to the utility model, through optimizing the housing material and improving the heat-dissipating capacity of the motor, the motor can be small in size, light in weight, large in output power and torque, high in overload capacity, excellent in heat dissipation and small in rotary inertia, thus meeting the electric automobile use requirements.

Description

Totally-enclosed alternating current motor

Technical field

The utility model relates to automobile motor, relates in particular to the used for electric vehicle traction electric machine, is specially a kind of totally-enclosed alternating current motor.

Background technology

Electric automobile is a kind of new forms of energy environmental protection automobile that rose in recent years, with the electric energy is power source, by the power traction system drive running car that controller and traction electric machine are formed, compare with traditional fuel-engined vehicle, have advantages such as zero discharge, pollution-free, energy-saving and cost-reducing, environmental protection.The core of electric automobile is the power traction system, comprise controller and traction electric machine, traction electric machine can be divided into self-ventilated machine and totally-enclosed machine, the self-ventilated machine structure as shown in Figure 1, support is provided with air inlet 7 and the air outlet 8 that is communicated with the base inner cavity, and in rotating shaft, also be provided with centrifugal fan 6, centrifugal fan 6 drove air motion when motor ran up, the motor internal heat can be distributed by air inlet 7 and air outlet 8, motor peak power and overload capacity height, because heat radiation is good, self-ventilated machine can accomplish that volume is little, in light weight; It is low that but the self-ventilated machine major defect is a protective capacities, motor internal directly and outside atmosphere communicate, dust, rainwater, dust storm all can directly be attacked critical components such as motor internal winding, bearing, cause motor operational failure rate height, reliability low, and when electric automobile Fraquent start, braking, when motor speed hanged down, rotation speed of the fan was low, cooling effect is poor, so the low speed heat dissipation problem also is the insoluble problem of self-ventilated machine; The structure of totally-enclosed machine as shown in Figure 2, inside does not have air duct, rainwater, dust storm, dust is difficult to attack the motor internal parts, the electrical fault rate is little, the reliability height, the degree of protection height, but the shortcoming of totally-enclosed machine is the heat that the motor internal thermal source produces to be difficult to effectively distribute, motor windings and bearing temperature can be very high, and affecting motor, too high winding and bearing temperature reliably use, make motor shortening in useful life, even under overload situations, burn winding, the totally-enclosed machine internal heat is inhomogeneous, exist local temperature too high, influence motor and use, for ensureing that motor reliably uses, have to reduce motor and use power and moment of torsion, increase motor volume and weight, so totally-enclosed machine exists volume big, Heavy Weight, power and moment of torsion are little, overload capacity is low, problems such as heat radiation difficulty make totally-enclosed machine be difficult to the fine electric automobile instructions for use of satisfying; The requirement of the operational mode of electric automobile, running environment, technical performance has determined that traction electric machine will have that protective capacities is strong, power output and moment of torsion is big, overload capacity is high, volume is little, in light weight, good heat radiation, the little adaptation of moment of inertia frequently play characteristics such as brake request, and self-ventilated machine and totally-enclosed machine obviously can not well satisfy the instructions for use of electric automobile.

Summary of the invention

The utility model provides a kind of totally-enclosed alternating current motor in order to solve the problem that existing traction electric machine can not finely satisfy the electric automobile instructions for use.

The utility model is to adopt following technical scheme to realize: totally-enclosed alternating current motor, comprise the totally-enclosed housing that constitutes by end cap that bearing cap is arranged on it and support, described end cap is the cast aluminium end cap, and support is the cast aluminium support, also is cast with the spiral cooling water pipe in the cast aluminium support.The material of prior motor support and end cap is a steel plate, the utility model totally-enclosed machine support and end cap adopt casting aluminium material, the relative steel plate of casting aluminium material has reduced motor weight greatly, bearing cap material on the end cap is still selected steel plate for use, guaranteed the bearing reliability of operation, also in the cast aluminium support, be cast with the spiral cooling water pipe, strengthened the motor cooling capacity, the utility model makes motor can accomplish that volume is little by case material being carried out preferred and improving the motor radiating ability, in light weight, power output and moment of torsion are big, the overload capacity height, good heat radiation, moment of inertia is little, has satisfied the instructions for use of electric automobile; And the utility model has been applied on the electric automobile of harbour, and operation conditions is good.

After traction electric machine adopts technical solutions of the utility model, efficiently solve the technology drawback that traditional self-ventilated machine and totally-enclosed machine exist.By comparison, adopt the traction electric machine of the technical program to have following advantage:

One, the motor protective capacities is strong, reliability is high, failure rate is low, satisfies electric car fully environment is moved instructions for use.

Two, the motor ventilation heat-sinking capability is efficient, can accomplish big torque, high-power, high start torque, high-peak power and overload magnification, satisfies the instructions for use of electric car peak value operating mode.

Three, motor volume is little, in light weight, can satisfy electric car to low-floorization, lightweight requirements.

Four, can guarantee motor high efficiency and heat radiation under any rotating speed, guarantee electric car instructions for use under any rotating speed.

Description of drawings

Fig. 1 is the cutaway view of self-ventilated machine.

Fig. 2 is the cutaway view of totally-enclosed machine.

Fig. 3 is the cutaway view of cast aluminium support.

Fig. 4 is a steel plate end cap portions separation structure schematic diagram.

Fig. 5 is a cast aluminium end cap portions separation structure schematic diagram.

Fig. 6 is a cutaway view of the present utility model.

Among the figure: 1-end cap, 2-support, 3-bearing cap, 4-spiral cooling water pipe, 5-bearing, 6-centrifugal fan, 7-air inlet, 8-air outlet.

Embodiment

Totally-enclosed alternating current motor comprises the totally-enclosed housing that is made of end cap 1 that bearing cap 3 is arranged on it and support 2, and end cap 1 is the cast aluminium end cap, and support 2 is the cast aluminium support, also is cast with spiral cooling water pipe 4 in the cast aluminium support.During concrete enforcement, motor windings connects alternating current by terminal box, and spiral cooling water pipe 4 is a copper plumbing, and spiral cooling water pipe 4 has water inlet and delivery port on support, and water inlet and delivery port connect cooling water recirculation system and just can be the motor cooling.

Claims

1. totally-enclosed alternating current motor, comprise the totally-enclosed housing that constitutes by end cap that bearing cap (3) are arranged on it (1) and support (2), it is characterized in that described end cap (1) is the cast aluminium end cap, support (2) is the cast aluminium support, also is cast with spiral cooling water pipe (4) in the cast aluminium support.