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Method for adjusting motor current ring parameter

A motor current and parameter setting technology, which is applied in the direction of excitation or armature current control, can solve the problems of potentiometer aging, time-consuming and labor-intensive, and difficult for general users to grasp.

Active Publication Date: 2010-05-12
SHENZHEN LEADSHINE INTELLIGENT CONTROL CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the method of adjusting the PI parameters of the current loop with a potentiometer (the P parameter refers to the proportional control signal parameter, and the I parameter refers to the integral control signal parameter), because the current loop is an inner loop, the adjustment result is not intuitive, the adjustment is difficult, and it is not easy to use. users; and because the potentiometer has problems such as aging and looseness, its reliability has been widely questioned
Using PC professional software to adjust the current loop is relatively intuitive and easy to grasp, but it needs a PC and communication interface, and each driver needs to be individually adjusted, which is time-consuming and laborious for many occasions
It is more difficult for product maintenance

Method used

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  • Method for adjusting motor current ring parameter
  • Method for adjusting motor current ring parameter
  • Method for adjusting motor current ring parameter

Examples

Experimental program
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Effect test

Embodiment Construction

[0034] The scheme of this embodiment mainly includes the following steps:

[0035] i. Find the initial value of the PI parameter;

[0036] ii. Given the target current Iref, sample the actual current;

[0037] iii. Data processing and index extraction: extract three indexes of current rise time, overshoot and steady-state current value;

[0038] iv. According to the index, adjust the current loop parameters according to the change rule;

[0039] v. Repeat the above three processes (ii-iv) until the index meets the predetermined target.

[0040] The specific implementation is as follows:

[0041] First, according to the bus voltage, calculate the duty ratio d% of a fixed voltage (usually 3-5V) according to formula 1:

[0042] d = u U DC * T (Formula 1)

[0043] in

[0044] d: output PWM duty cycle

[0045] u: given voltage, generally fixed at 3~5V

[0046] u DC : DC bus...

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Abstract

The invention relates to a method for adjusting motor current ring parameters, which extracts three indexes of current rising time, overshoot and a steady state current value and adjusts the current ring parameters according to the indexes by a change rule. The invention realizes self adjustment in an original motor driver without adding any external software and hardware, and the self adjustment does not need hardware cost and is free from the influence of the motor parameter and the power supply spot voltage of driver voltage; a code is simple to realize, the parameters are convergent, and a self-adjustment result is good. The adjustment can be realized just by an external start signal, the current ring parameter adjustment can be automatically finished during each electrifying, and the requirement on the professional level of a user is greatly reduced.

Description

technical field [0001] The invention relates to a motor drive system, in particular to a method for setting current loop parameters in an all-digital motor driver adopting a PI current regulation mode. Background technique [0002] For the motor driver, the performance of the current loop as the inner loop determines the performance of the position loop and (or) the speed loop, which plays a key role. Existing all-digital motor drive systems mainly use potentiometers to adjust parameters or PCs with corresponding professional debugging software to set motor current loop parameters. For the method of adjusting the PI parameters of the current loop with a potentiometer (the P parameter refers to the proportional control signal parameter, and the I parameter refers to the integral control signal parameter), because the current loop is an inner loop, the adjustment result is not intuitive, the adjustment is difficult, and it is not easy to use. users; and because of aging and l...

Claims

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Application Information

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IPC IPC(8): H02P7/28H02P7/29
Inventor 张健赖九才李卫平熊世辉
Owner SHENZHEN LEADSHINE INTELLIGENT CONTROL CO LTD
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