Variable-speed driving system with multiple driving motors and gear shifting control method of variable-speed driving system

Abstract

The invention relates to a variable-speed driving system with multiple driving motors. The variable-speed driving system is characterized by comprising a first driving motor (1), a second driving motor (2), a third driving motor (3), a first input shaft (4), a second input shaft (5), a power output shaft (6) and a power take-off shaft (13). The variable-speed driving system aims at heavy trucks such as dump trucks, towing vehicles, mine trucks and the like with severe and complex operation conditions, and through cooperative work of the multiple motors, the problem of power interruption in the gear shifting process is thoroughly solved, and the reliability of gear shifting under the severe working condition is guaranteed; through a multi-motor working scheme, when the power needs to be increased in the later period, the multiple motors can be increased at the same time, and the technical difficulty and the cost increasing amplitude are reduced; and the double motors are coupled on an intermediate shaft after input, intermediate shaft gears are reused at the same time, and multiple gears are achieved through fewer gears.

Description

technical field [0001] The invention relates to the technical field of motor drive systems, in particular to a multi-drive motor variable speed drive system and a shift control method thereof. Background technique [0002] With the rapid development of the new energy vehicle industry, pure electric drive systems are more and more widely used in the field of commercial vehicles. At present, the multi-speed pure electric drive systems in commercial vehicles mostly use "single drive motor + AMT gearbox" and "drive motor + The drive form of "AMT gearbox + direct drive motor", in which the scheme of "single drive motor + AMT gearbox" has the problem of interruption of gear shifting power, and it is difficult to shift gears under heavy load climbing conditions; while "drive motor + AMT gear shifting" In the drive form of box + direct drive motor, only the direct drive motor outputs power during shifting, and the driving ability is weak, and there is still the problem of difficulty...

AI Technical Summary

Problems solved by technology

[0002]With the rapid development of the new energy vehicle industry, pure electric drive systems are more and more widely used in the field of commercial vehicles. Currently, there are many multi-speed pure electric drive systems in commercial vehicles. Adopt the drive forms of "single drive motor + AMT gearbox" and "drive motor + AMT gearbox + direct drive motor". It is difficult to shift gears under slope conditions; while the drive form of "drive motor + AMT gearbox + direct drive motor" only outputs power from the direct drive motor during the gear shift period, the driving ability is weak, and it is still difficult to shift gears under severe working conditions The problem

Moreover, with the increase of vehicle tonnage, the requirements for the power of the drive system will further increase, and increasing the power of the existing system will lead to a substantial increase in cost

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