Method and system for controlling motor speed
A technology of motor speed and control method, which is applied in control systems, motor control, vector control systems, etc., can solve the problems of not taking into account the reduction of speed response time and speed overshoot, etc., to solve the problem of shortening speed response time and shortening speed response time. , Solve the effect of speed overshoot
Active Publication Date: 2018-09-11
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Problems solved by technology
[0005] The invention provides a motor speed control method and system, which solves the problem that the existing technology cannot take into account the reduction of the speed response time and the speed overshoot
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[0047]Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar parameters or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0048] Usually the vehicle controller controls the speed through the accelerator pedal opening and the motor speed signal. After receiving the speed command, the motor control unit converts it into the driving torque through PI adjustment and controls the driving motor to send out the corresponding Torque, the specific execution steps can be as follows: the torque value at the current speed can be obtained by looking up a set of Id, Iq, and then through the space vector algorithm, the controller U, V, W three-phase current, in order to i...
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The invention discloses a motor rotational speed control method and system. The method comprises the steps that after a rotational speed command is received, the difference between the command rotational speed and the actual rotational speed of a motor is taken as a first rotational speed difference to determine whether the first rotational speed difference is greater than a first threshold; if the first rotational speed difference is not greater than the first threshold, the command rotational speed is used as target rotational speed; if the first rotational speed difference is greater than the first threshold, the sum of the command rotational speed and first compensation rotational speed is used as target rotational speed; I variable is effectively enhanced to increase driving force, and rotational speed overshoot is prevented; a second rotational speed difference corresponding to the target rotational speed is acquired; the difference between the first rotational speed difference and the second rotational speed difference is used as acceleration; the acceleration is used as the proportional adjustment item of PI control, and the second rotational speed difference is used as the integral adjustment item of PI control; the coefficients of the proportional adjustment item and the integral adjustment item are acquired respectively; and PI control is carried out on the torque of the motor. According to the invention, the problem that the prior art cannot take into account the reduction of rotational speed response time and rotational speed overshoot can be effectively solved.
Description
technical field [0001] The invention relates to the technical field of electronic control, in particular to a motor speed control method and system. Background technique [0002] Electric vehicles are the hottest topic in the new energy industry. In recent years, the development of domestic electric vehicle technology has advanced by leaps and bounds, and at the same time, more requirements have been placed on the performance of electric vehicles. As far as automobiles are concerned, there are strict requirements on the responsiveness and precision of speed control, especially on urban roads with complex road conditions, where various conditions occur frequently, so the responsiveness to speed control must be high and the control precision must be precise. [0003] Usually, the speed control of the motor is performed by calculating the difference between the current speed command speed and the actual speed and the current acceleration of the motor, and converting it into the...
Claims
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IPC IPC(8): H02P21/00
CPCH02P21/0003H02P2205/07
Inventor 梁亦隆艾敬尧张陈郭航
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD