A three-motor hybrid drive truck and its power system parameter matching method

Abstract

The invention relates to a three-motor hybrid truck and a power system parameter matching method. The three-motor hybrid truck is assembled by using a first driving motor, a first input shaft, a first speed reducer, a first output shaft, an automobile front axle, a second input shaft, a second driving motor, a first power cell, a second power cell, a third driving motor, a third input shaft, an automobile rear axle, a second output shaft, a second speed reducer, a third power cell, a controller and a fourth power cell. According to the invention, in the parameter matching process of a power system, analog computation is carried out on power system power demand under a CYC-UDDS circulating condition of the truck by using a vehicle backward simulation model so as to ensure the reasonability of the design. According to the invention, the capacity of the single driving motor can be obviously reduced, the motor manufacturing difficulty is reduced and the cost is also reduced; and meanwhile, through reasonable power matching of the three motors, the dynamic property and economic efficiency of the truck can be obviously improved.

Description

technical field [0001] The invention belongs to the field of automobile power systems, and in particular relates to a three-motor hybrid drive truck and a power system parameter matching method. Background technique [0002] In order to solve the energy and environmental crisis, electric vehicles have become a research hotspot in the world's automobile industry. As an important part of the automobile industry, the electrification of trucks will make outstanding contributions to solving energy and environmental problems. [0003] At present, electric trucks are mainly driven by a single motor. Compared with passenger cars, electric trucks have the characteristics of heavy load, high wind resistance coefficient, large differences in power requirements between no-load and full-load, and low-speed and high-speed. Driven by a motor, under low-speed and no-load conditions, there will be a phenomenon of large horse-drawn carts and low energy utilization efficiency. [0004] Elect...

AI Technical Summary

Problems solved by technology

[0004] Electric trucks require huge driving power under full load and high speed conditions, so the driving motor power of single-motor-driven electric trucks will be very large, and high-power driving motors and controllers generally require water-cooling mechanisms, and the manufacturing process is complicated , high production cost

[0005] Electric trucks have heavy loads, and under deceleration and braking conditions, the recoverable energy is relatively large, and the single-motor drive scheme cannot fully recover braking energy

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