Novel double-motor coupling power mechanism and control method thereof

Abstract

The invention provides a novel double-motor coupling power mechanism and a control method thereof. The novel double-motor coupling power mechanism comprises a main driving motor and an auxiliary driving motor, wherein the main driving motor is provided with a first output shaft; the first output shaft is fixedly connected with a first sun gear; a first planet gear set is arranged on the outside ofthe first sun gear; a second planet gear set is arranged on the outside of the first planet gear set; the auxiliary driving motor is provided with a second output shaft which sleeves the outside of the first output shaft; the second output shaft is fixedly connected with a second sun gear; the second sun gear is engaged with the second planet gear set; a clutch is arranged between the first output shaft and the second output shaft; and brakes are separately arranged on the outside of the first output shaft and the outside of the second output shaft. By the two brakes and the clutch, power ofa power system does not interrupt in a gear shifting process, impact does not exist during gear shifting, the power system has good gear shifting quality, only one of the brakes and the clutch requires to be controlled to switch over different modes, and thus, the power system is controlled simply.

Description

technical field [0001] The invention relates to a novel dual-motor coupled power mechanism and a control method thereof. Background technique [0002] At present, the driving system of electric vehicles mainly adopts the transmission scheme of single-motor accelerator and decelerator. The torque and speed requirements of the vehicle under various working conditions are realized through the control of the motor, resulting in a large rated power of the motor and a low load rate of the motor. , There will often be a phenomenon of "big horses and small carts", which eventually causes the drive motor to not always work in its high-efficiency range, thereby reducing the cruising range of the electric vehicle. In order to improve the economy of electric vehicles on the premise of satisfying the power, some dual-motor coupling power systems have been applied to pure electric vehicles. Through the power coupling mechanism and coordinated control of the working mode and working range...

AI Technical Summary

Problems solved by technology

[0006] The present invention improves the above problems, that is, the technical problem to be solved by the present invention is to realize the torque and speed requirements of the vehicle under various working conditions through the control of the motor, resulting in a large rated power of the motor and a relatively high load rate of the motor. , in addition, the structure of the existing dual-motor power system is relatively complex and the flexibility is poor

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