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Motor control method and system

A technology of motor control and motor torque, applied in the direction of motor, control drive, control of multiple AC motors, etc., can solve problems such as insufficient stability control

Active Publication Date: 2015-08-05
HUBEI AXLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a motor control method and system that can improve the stability of the vehicle when it is bending, aiming at the defect of insufficient control of the stability of the vehicle when the vehicle is bending in the prior art

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of 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.

[0043] The motor control method in the embodiment of the present invention calculates the motor torque based on the optimal slip ratio to correct the torque command in real time, controls the rotation of the motor, and controls the slip ratio to reach the optimal position to realize smooth steering.

[0044] The motor control method in the embodiment of the present invention specifically includes the following steps:

[0045] Determine whether the vehicle is in a bending state;

[0046] Calculation of motor torque when the vehicle is cornering (See below for the specific calculation formula);

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Abstract

The invention discloses a motor control method and system. The method comprises the following steps of: judging whether a vehicle is under a turning state; when the vehicle turns, calculating a motor torque Ti'; and according to the calculated motor torque, regulating the motor. When the vehicle turns, the motor torque is calculated on the basis of the optimal slip rate and is used for correcting a torque command in real time; and the motor rotation is controlled so as to control the slip rate to achieve the optimal position to realize smooth turning. In addition, according to the invention, a steering sensor is omitted on the basis of the slip rate steering control, and the cost can be saved.

Description

technical field [0001] The invention relates to the field of electronic differential speed control, in particular to a motor control method and system. Background technique [0002] Currently, there are two popular electronic differential control strategies: speed-based regulation and torque-based regulation. The two control strategies have their own advantages and disadvantages: the differential strategy based on torque control can timely adjust the torque output according to the load change when the vehicle is running, and has good dynamic performance, fast response and strong adaptability, but the essence of differential control is The influence of speed and torque on speed is realized through dynamic equations. Since there is a first-order derivative between torque and speed, which is a nonlinear relationship, the control torque has a delay effect on the change of speed; the differential strategy based on speed control can Accurately control the wheel speed. At this tim...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/00H02P5/74
CPCY02T10/642Y02T10/64
Inventor 王鹏程周佳
Owner HUBEI AXLE