Water-cooled asynchronous motor for hybrid electric vehicles

Abstract

The invention discloses a water-cooled asynchronous motor for a hybrid vehicle and belongs to the structure of an asynchronous machine. A motor which is used in a coach is designed to the water-cooled asynchronous motor, a novel cooling mode is used in aspects such as a casing of the motor, a water cavity inside the motor and a bearing, a casing water-cooled waterway is designed to an even water channel, the flow is smooth, the resistance is low and the radiation is quick. Simultaneously, gasket positions are arranged on an upper end face and a lower end face of the casing axially, a water-stop structure of annular gaskets are used in a connection portion of a base and the water channel, by the aid of gaskets, a process that an aluminum alloy plate is welded and sealed is omitted, materials, working hours and cost are saved, the defect of poor welded sealing caused by argon arc welding is avoided, the reliability of water-cooled casing usage and motor operation is improved, and the water sealing effect is good. The water-cooled asynchronous motor is mainly used in the coach using hybrid power and serves as a main drive motor.

Description

technical field [0001] The invention relates to the structure of an asynchronous motor, in particular to a water-cooled asynchronous motor for a hybrid vehicle in which a water cavity and a bearing are provided in the motor casing for cooling. Background technique [0002] The operation mode used by existing hybrid electric passenger cars, especially large buses, generally adopts a parallel or series structure. The so-called series structure means that the power of the diesel engine and the drive of the motor are connected through a clutch, and the motor is driven by the motor when the bus is initially started, which avoids the phenomenon of black smoke at the initial start of the diesel engine and the excessive fuel consumption of the diesel engine at low speed. To achieve the purpose of saving fuel. At low speed (generally set within 22.5KM / h), the bus is driven by the motor. When the speed of the bus reaches 22.5KM / h or more, it is driven by the diesel engine. At this ti...

AI Technical Summary

Problems solved by technology

But its use, due to frequent clutches, will generate a lot of brake friction heat, and it is close to the diesel engine, generating high temperature at the front end of the motor, sometimes as high as 100 degrees or more. Therefore, the use environment of the front end bearing of the motor is very harsh, and often occurs Accidents of bearing burnout etc.

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