Downhill energy recovery control method and system for pure electric mining truck

An energy recovery and control method technology, applied in electric braking systems, electric vehicles, control devices, etc., can solve problems such as the inability to meet the requirements of braking torque and kinetic energy recovery, and reduce the cost of mineral development and maintenance. Cost and wear reduction effect

Active Publication Date: 2021-03-26
SHAANXI FAST GEAR CO
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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the energy recovery system of the existing pure electric mining truck cannot meet the requirements for braking torque and kinetic energy recovery when the slope is 15% to 50%, and proposes a pure electric mining truck. Slope Energy Recovery Control Method and System

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  • Downhill energy recovery control method and system for pure electric mining truck

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Embodiment Construction

[0035] In order to illustrate the technical solution of the present invention more clearly, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] The pure electric mining truck in the embodiment of the present invention is 65T to 100T, and the vehicle drive system mainly includes: including a transmission, a retarder, a vehicle mechanical brake, a motor and a motor controller, a battery and a vehicle controller;

[0037] (1) Permanent magnet synchronous motor and motor controller, the electric and generating rated power of the permanent magnet synchronous motor is 250kW, and the peak value is 350kW;

[0038] (2) 7-speed automatic transmission, speed ratio 9.14, 5.59, 4.07, 2.99, 2.15, 1.61, 1, maximum input torque of transmission 2000Nm;

[0039] (3) 4-speed eddy current retarder, the braking torque-duration is Torq1-t1, Torq2-t2, Torq3-t3, Torq4-t4;

[0040] (4) Vehicle mechanical brake;

[0...

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Abstract

The invention relates to an energy recovery method of an electric vehicle, in particular to a downhill energy recovery control method and system for a pure electric mining truck, and aims to solve thetechnical problem that an existing energy recovery method for the pure electric mining truck cannot meet the energy recovery requirement under the condition that the gradient is 15%-50%. The method comprises the steps of collecting whole vehicle information in real time; calculating the vehicle speed, the transmission target gear, the motor braking torque and the recyclable electric quantity under the current slope; judging whether the recyclable electric quantity is smaller than the rechargeable electric quantity of the battery; judging whether the motor braking torque meets the current gearbraking torque requirement of the transmission; determining to start an n-th-gear retarder; judging whether the residual electric quantity of the battery reaches the charging upper limit of the battery; judging whether the current gradient is smaller than a gradient set value; the invention further provides an energy recovery system for realizing the method. The energy recovery system comprises atransmission, a retarder, a whole vehicle mechanical brake, a motor, a motor controller, a battery and a whole vehicle controller.

Description

technical field [0001] The invention relates to an energy recovery method for an electric vehicle, in particular to a downhill energy recovery control method and control system for a pure electric mining truck. Background technique [0002] Most of the energy recovery methods currently applied to pure electric mining trucks are implemented by partial changes on the basis of passenger vehicles. The method of using the motor as a generator for energy recovery can meet general road conditions and better road conditions. But it can't meet the requirements of braking torque and kinetic energy recovery under the situation of 15% to 50% slope of mine truck. Contents of the invention [0003] The purpose of the present invention is to solve the technical problem that the energy recovery system of the existing pure electric mining truck cannot meet the braking torque and kinetic energy recovery requirements when the slope is 15% to 50%, and proposes a pure electric mining truck. S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/18B60L7/28B60L7/26
CPCB60L7/18B60L7/28B60L7/26B60L2240/12B60L2240/48B60L2240/423
Inventor 周思全严鉴铂刘义袁景敏任帅刘奇正
Owner SHAANXI FAST GEAR CO
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