Stepping motor acceleration and deceleration control method based on FPGA

Abstract

The invention discloses a stepping motor acceleration and deceleration control method based on an FPGA, and the method comprises the steps: generating a speed table of a controlled stepping motor based on start frequency, operation time and target frequency through a preset operation formula; determining a reading sequence of the speed table according to acceleration or deceleration demands; reading the speed table based on the determined reading sequence, generating a pulse signal through a clock, and driving the controlled stepping motor to carry out the acceleration and deceleration. Duringthe control of the speed of the stepping motor, the pulse frequency is changed through the speed table so as to drive the stepping motor to accelerate and decelerate. Therefore, the method can achieve the precise control of the movement of the stepping motor, guarantees the reliability of the motor, guarantees that the motor is not out of step, and is good in practicality. Moreover, the same speed table is employed for the acceleration and deceleration of the stepping motor. During deceleration, the data in the table just needs to be read at an inverted order, thereby simplifying the design,and reducing the RAM capacity.

Description

technical field [0001] The invention belongs to the technical field of stepping motor control, and in particular relates to an FPGA (Field Programmable Gate Array, Field Programmable Gate Array)-based stepping motor speed-up and down-speed control method and system. Background technique [0002] At present, due to the characteristics of stepper motors, when driving a load, the motor often needs acceleration and deceleration control during the start and stop stages. Among various acceleration and deceleration curves, the use of S-shaped curves for speed up and down is more suitable for the torque of stepper motors. frequency characteristics. [0003] Stepper motor is a discrete motion device, which is widely used in various fields of the national economy. The current general control method is to use a single-chip microcomputer combined with a stepper motor controller for control. The disadvantages of this control method are: 1. Due to The operating speed of the single-chip m...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of FPGA-based stepper motor speed-up and down-speed control method and system, aiming to solve the traditional stepper motor control technology that needs to customize different control formulas according to the type of single-chip microcomputer with low efficiency and high cost; and Because the stepper motor is easy to lose step or cannot rotate according to the preset number of steps, the problem of poor practicability

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