A multi-channel series-parallel water-cooling system for motors

Abstract

The invention discloses a motor multipath series-parallel water cooling system. The motor multipath series-parallel water cooling system comprises a water pipe at the tail end of the stator core yoke portion of the linear portion of an electric generator and a motor end winding external cooling waterway, and a water loop is composed of the water pipe at the tail end of the stator core yoke portion of the linear portion of the electric generator and the motor end winding external cooling waterway; the motor end winding external cooling waterway is composed of a cooling water pipe cooling system loop of a lower winding layer and a cooling water pipe cooling system loop of an upper winding layer; the cooling water pipe cooling system loop of the lower winding layer is composed of at least one set of circumferential water pipes which are communicated in the direction from the linear portion to the nose end, and the cooling water pipe cooling system loop of the upper winding layer is composed of at least one set of circumferential water pipes which are communicated in the direction from the linear portion to the nose end; the inner-diameter pipe wall of the cooling water pipe cooling system loop of the end lower winding layer is laid on the outer-layer surface of the lower winding layer; the outer-diameter pipe wall of the cooling water pipe cooling system loop of the end upper winding layer is laid on the inner-layer surface of the upper winding layer.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a multi-channel series-parallel water cooling system for motors. Background technique [0002] Large permanent magnet brushless motors, permanent magnet direct drive and semi direct drive wind turbines, etc. operate under high load conditions or high power densities. The temperature of the permanent magnet motor is high, and the motor components need to be cooled reasonably. At present, the cooling of large permanent magnet motors is generally to cool the stator core and windings of the motor by passing water through the back of the stator yoke. The temperature difference between the internal and straight section windings is very large and so on. On the one hand, the high temperature of the end winding, which exceeds the allowable temperature of the insulation, will reduce the life of the insulation, and in severe cases will cause the motor to burn out. On the other hand, due to...

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is how to reduce the temperature difference between the winding at the end and the straight section, to ensure the safe and reliable operation of the motor, and to improve the operation stability of the motor

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