A speed control method for a hybrid electric vehicle

Abstract

The invention discloses a speed control method of a hybrid electric vehicle. The method includes: a signal conversion module divides the target speed into five gears according to the target speed, and adopts a power distribution strategy to determine the output power of a DC power supply. The first The speed controller adopts the automatic fast adjustment strategy to obtain the first control signal, the second speed controller obtains the second control signal according to the speed deviation signal, the current controller adopts the vector control strategy to obtain the third control signal, and the second comparator converts the first control signal The sum of the signal and the third control signal forms a speed command signal, and the PWM generator obtains a PWM wave with an adjustable duty ratio according to the speed command signal, and the PWM wave drives the inverter to convert the DC power input by the power supply DC power supply into an adjustable amplitude frequency of alternating current. The method can realize the speed control of the hybrid electric vehicle, and has the advantages of fast response speed and low energy consumption for driving the hybrid electric vehicle to travel at a target speed quickly.

Description

technical field [0001] The invention relates to the technical field of speed control of a hybrid electric vehicle, in particular to a speed control method of a hybrid electric vehicle. Background technique [0002] At present, global energy and environmental problems are becoming increasingly prominent, and countries all over the world are actively seeking solutions, especially in the field of new energy vehicles. As a zero-emission and zero-pollution transportation tool, the hydrogen fuel cell-lithium battery hybrid vehicle with hydrogen as the main energy source is bringing an important innovation to the world's automobile industry. Different from traditional internal combustion engine vehicles, frequently adjusting the output power of DC power supply will seriously affect the service life of vehicle hydrogen fuel cells and lithium batteries, and due to the shortcomings of traditional control systems, a series of problems such as slow control response speed and large syste...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the invention is: aiming at the technical problems existing in the prior art, provide a speed control method for a hybrid electric vehicle, overcome the shortcoming of frequent changes in the output power of a DC power supply, and solve the problem of high energy consumption of the speed control system of a hybrid electric vehicle problem, improve the response speed of the entire hybrid vehicle speed control system, and reduce the energy consumption of the system

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