Cooling system and method of motor and controller

Abstract

The invention relates to a cooling system and method of a motor and a controller and belongs to the technical field of cooling of automobile driving systems. The system comprises a cooling bag assembly, a circulating loop and an expansion water tank; the two ends of the circulating loop are connected with a high-position connection port and low-position connection port of the cooling bag assemblyrespectively, and the circulating loop comprises water pumps connected in series, a first branch path and a second branch path, wherein the first branch path and the second branch path are connected with each other in parallel; the expansion water tank is connected with the cooling bag assembly and the circulating loop, wherein the first branch path comprises an integrated controller and a power generator which are arranged in series, and the integrated controller is positioned in front of the power generator. The second branch path includes a driving motor. By adopting the cooling system, thedemands of the controller and the power generator for flow and heat dissipation can be met at the same time, and the demands of the driving motor for flow and heat dissipation can also be met.

Description

technical field [0001] The invention relates to a cooling system and method for a motor and a controller, and belongs to the technical field of cooling of an automobile drive system. Background technique [0002] There are two main traditional cooling methods for current automotive electric drive systems. The first is that the generator and the drive motor are arranged in series, and the generator controller and the drive motor controller are arranged in series to form independent cooling systems. However, this method has the disadvantage of taking up a lot of space, and each cooling system uses a water pump, a radiator, and one or more electronic fans for heat dissipation, and the production cost is relatively high. The second is that the controller, the generator, and the drive motor are arranged in series to form a cooling system, and a water pump, a radiator, and one or more electronic fans are used for pumping and cooling. However, the disadvantage of this type of coo...

AI Technical Summary

Problems solved by technology

The disadvantage is that the water temperature will be delayed compared with the temperature of the generator, drive motor stator coil and the temperature of the generator controller and drive motor controller IGBT, and there will be a temperature difference, which will change with the driving conditions of the vehicle And changes, it is difficult to grasp the precise control algorithm

Therefore, in the actual driving process of the vehicle, the water temperature will not be high, but the generator, drive motor stator coil, generator controller, and drive motor controller IGBT have already experienced high temperature and power limitation, which affects the normal driving of the vehicle.

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