A track-bound vehicle electric machine
A rail vehicle, vehicle technology, applied to vehicle components, railway vehicles, locomotives, etc., can solve the problems of falling on the safety equipment on or near the railway track, delay, stator winding damage, etc.
Active Publication Date: 2018-12-21
BOMBARDIER TRANSPORTATION GMBH
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Problems solved by technology
However, while it is better to blow molten copper and steel down the railroad tracks in the event of an arc in an electric motor than onto a gearbox or other components in a bogie, the authorities responsible for railroad track safety do not Willingness to accept the fact that in the event of a malfunction, molten copper may end up on safety equipment on or near the railway track
[0010] A possible way to reduce this problem would be to brake the vehicle to a lower speed once the arc is detected in order to remove the voltage maintaining the arc, but this would cause a delay and when the vehicle is in a tunnel this might not even be allowed until the vehicle drive out of the tunnel
As a result, there may be substantial damage to the stator windings, and a large portion of the windings may melt and blow out of the motor again
Method used
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Embodiment Construction
[0037] figure 1The main components of a rail vehicle electric machine are schematically represented, of the type to which the present invention relates and disclosed in more detail in EP2264860. The motor has a stator 1 with a stator body 2 having a stator winding 3 wound around it and arranged to electrically generate a plurality of stator poles arranged around the inner circumference of the stator body. The stator windings are received in radial slots of the stator body which extend over the entire length of the stator body. The total number of slots and the number of slots per pole may be any conceivable, but the number may be 48 and 4 as examples.
[0038] The electric machine also comprises a rotor 4 with a rotor body 5 which, like the stator body, is made of a laminated assembly of mutually electrically insulated magnetic steel gussets stacked axially with respect to the rotor's axis of rotation 6 for making these The eddy current losses in the body are kept low and th...
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An electric machine with a rotor (4) rotatably disposed within a stator (1) with a stator winding (3) has a plurality of permanent magnets (8) received therein. A casing (17) encloses the stator and the rotor, and an impeller (13) with blades is fixed to an axle (7) of the rotor so as to generate a flow of air through the casing for cooling end-turns (25) of the stator winding by drawing air through an inlet opening (18) at one end of the casing and blowing it out of the casing through an outlet opening (19) at the other end of the casing. At least one shutter is arranged to close the outlet opening (19) when the temperature of the cooling air through the outlet opening reaches a predetermined level well above a maximum level of the temperature possible to be reached under normal operationof the electric machine so as to close the outlet opening upon occurrence of arcing in the end-turns. A temperature dependent member is arranged in the air flow through the outlet opening to obtain such closing.
Description
technical field [0001] The invention relates to a rail vehicle electric machine arranged to be used as a motor for generating tractive force of a rail vehicle and comprising: [0002] a stator having a stator body with a stator winding wound around it and arranged to electrically generate a plurality of stator poles arranged around the inner circumference of the stator body; [0003] means arranged such that the stator windings are connected to an AC power source or receiver; [0004] a rotor rotatably arranged within said stator and having a rotor body in which a plurality of permanent magnets are received; [0005] · the casing, which encloses the stator and rotor; and [0006] A bladed impeller fixed at one end of the stator body to the shaft of the rotor so as to generate an air flow which is directed substantially axially with respect to the axis of rotation of the rotor towards the other end of the stator body for pumping Suction air is blown out of the housing throug...
Claims
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IPC IPC(8): H02K9/06H02K5/136
CPCH02K9/06H02K2205/09H02K2213/09H02K5/207H02K11/26B60L13/03B61C3/00H02K5/225H02K7/006H02K9/24
Inventor S·安德松
Owner BOMBARDIER TRANSPORTATION GMBH