Winding stator core end structure for low-voltage, high-power, high-current motor

Abstract

The invention provides a winding stator core end structure for a low-voltage, high-power, high-current motor. The winding stator core end structure includes a three-phase winding end, a stator core press ring, axial fixing rods, copper bar rings, pole phase connection lines and outgoing wire copper bars. The plurality of axial fixing rods are circumferentially evenly fixed on the stator core pressring, the axial fixing rods extend outwards from the stator core end in the axial direction, the stator core end is provided with three copper bar rings arranged side by side in the axial direction,and the three copper bar rings are fixed on the axial fixing rods respectively. In the radial direction of a stator core, the copper bar rings are located on the outer side of the winding end, the three-phase winding pole phase connection lines are electrically connected with the corresponding copper bar rings respectively, the three copper bar rings are electrically connected with the outgoing wire copper bars respectively, the outgoing wire copper bars are led out of the stator core in the radial direction, and after being led out, the outgoing wire copper bars are connected with an externalthree-phase power line. The copper bar rings and the outgoing wire copper bars are adopted, to meet the needs of high current of the motor; the pole phase connection lines and the outgoing wire copper bars do not occupy the space of the stator core end, and thus the motor dimension is reduced.

Description

Technical field [0001] The invention belongs to the technical field of low-voltage high-power motor design, and specifically relates to a low-voltage high-power high-current motor with a winding stator core end structure. Background technique [0002] Due to the user's increased motor power and relatively small voltage, the motor phase current can reach 2000A, and due to the user's space constraints, the total motor length is limited; and the user's rated speed is low (600-900 rpm), but the constant power zone reaches 2200 rpm , In order to increase the critical speed of the motor, the total length of the frame is limited, which results in the length of the end of the winding stator core is greatly restricted. [0003] On the one hand, due to the large current, the flexible cable in the existing junction box can no longer be realized with winding stator core; on the other hand, the user's motor power is increased, the voltage is small, the number of motor turns is small, the wire g...

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Problems solved by technology

[0002] Due to the increased power of the user's motor, the voltage is relatively small, and the phase current of the motor can reach 2000A, and due to the space limitation of the user, the total length of the motor is limited; and the user's rated speed is low (600-900 rpm), but the constant power area reaches 2200 rpm , in order to increase the critical speed of the motor, the total length of the frame is limited, resulting in a great limitation in the length of the end of the stator core with windings

[0003] On the one hand, due to the large current, it is impossible to realize the winding stator core of the flexible cable in the existing junction box; The axial space is large, and the connection between poles and phases occupies a large axial space, resulting in an increase in the total length of the motor, which cannot meet the user's requirements for the use of space

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