Method and device for controlling an electric vehicle

A control method and electric vehicle technology, applied in the field of electric vehicles, can solve the problems of slow acceleration, speed change, fast acceleration, etc.

Active Publication Date: 2019-06-25
广东高标智能科技股份有限公司
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Problems solved by technology

[0004] In order to overcome the problems of slow acceleration in the early stage and fast acceleration in the late stage of the electric bicycle in the prior art, and large speed changes when the electric bicycle is vacated and landed, an embodiment of the present invention provides a control method for an electric bicycle on the one hand, including:

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  • Method and device for controlling an electric vehicle
  • Method and device for controlling an electric vehicle
  • Method and device for controlling an electric vehicle

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Embodiment Construction

[0040] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] In the electric vehicle vector control system, due to the different pole pairs of the motor, the speed obtained by the Hall sensor cannot correctly calculate the real mechanical speed of the motor. In the case of no need to precisely control the motor speed, by applying different torque currents, PI adjusts the output torque voltage, and the SVPWM (Space Vector Pulse Width Modulation, Space Vector Pulse Width Modulation) algorithm controls the PWM (Pulse Width Modulation, pulse Width Modulation) The duty cycle can adjust the motor speed. In practical application,...

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Abstract

The invention provides an electric bicycle control method. The electric bicycle control method comprises the steps that the current acceleration speed of an electric bicycle is obtained; proportional control and integral control are carried out over the deviation of the current acceleration speed and a preset acceleration speed reference value, and a torque current is obtained; and the speed of the electric bicycle is controlled based on the torque current. The invention further provides an electric bicycle control device. By means of the electric bicycle control method and device, the actual acceleration speed of the electric bicycle can trend to stability, and therefore the problems that when an electric bicycle is started, earlier stage acceleration is slow, later stage acceleration is fast, and the speed change is large when the electric bicycle rises to the sky and then falls to the ground when passing through an uneven road surface or a deceleration strip are solved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a control method and device for electric vehicles. Background technique [0002] At present, electric bicycles usually use the input value of the speed control handle as the reference amount of torque current, and detect the feedback amount of torque current, and perform PI (proportional integral controller, proportional adjustment on the reference amount and feedback amount of torque current) and integral regulation) regulation, get the torque voltage, and control the speed of the electric bicycle through the torque voltage. [0003] There are two shortcomings in the above speed control method: first, when the electric bicycle starts, the acceleration is slow in the early stage and fast in the late stage; second, the speed of the electric bicycle changes greatly when it passes through potholes or speed bumps. Contents of the invention [0004] In order to overcome t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20
CPCB60L15/20B60L2200/12B60L2240/12B60L2240/14B60L2240/429Y02T10/72
Inventor 张新业朱川邻
Owner 广东高标智能科技股份有限公司
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