Tandem type hybrid power electric drive system

Abstract

The invention provides a tandem type hybrid power electric drive system, and belongs to the field of electric engineering. The tandem type hybrid power electric drive system is used for solving the problems that in the prior art, the performance is limited by actual design in the low-speed regeneration braking process, and an engine / generator power supply module and a peak value power supply have to meet the constraint condition that the rated voltages are identical. The tandem type hybrid power electric drive system comprises the engine / generator power supply module, the peak value power supply, an electromotor drive device, a traction electromotor and a DC-DC converter. The power supply voltage output end of the engine / generator power supply module is electrically connected with the voltage input end of the electromotor drive device to form a DC bus. The voltage output end of the electromotor drive device is electrically connected with the power supply voltage input end of the traction electromotor. The peak value power supply is connected with the DC bus through the DC-DC converter. The constraint condition that the rated voltage of the engine / generator power supply module and the rated voltage of the peak value power supply are identical is broken through in the system, and the peak value power supply can be miniaturized.

Description

technical field [0001] The invention relates to the electrical field, in particular to a serial hybrid electric drive system. Background technique [0002] With the development of electric vehicles, the successful design of the electric drive system means ensuring that the vehicle can obtain the desired performance, such as: acceleration, hill climbing ability, high vehicle speed and high operating efficiency. Traction motors, engines / generators, peak power supplies and electrical couplings are the design components of major concern and their design should basically be studied at the system level in order to ensure that all components work in harmony. [0003] figure 1 Shown is a brief structural diagram of an existing series hybrid electric vehicle drive system, wherein the electric coupling device, namely the motor drive device 4 in the figure, is used to connect three power sources—the engine / generator power supply module 1, the peak The only coupling point where the po...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a series hybrid electric drive system, which is used to solve the problem that the performance of the existing series hybrid vehicle drive system is limited by the actual design during low-speed regenerative braking, and if the engine / generator power supply module and the peak power supply The constraint of having the same rated voltage can lead to heavy peak power problems

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