Estimating DC Motor Parameters Using Simulink Design Optimization-EEWORLD

Collect

Theoretical Motor Model

Key Parameters Explanation

Using Simulink to build a motor model

Key Components

Rotary electromechanical converter (electrical signal to mechanical signal)

Function: Provides an interface between the electrical and mechanical rotational domains. If the current and voltage through the electrical port are I and V, and the torque and angular velocity through the mechanical port are T and w, then

T = K * I

V = K * w

Use this module as a torque/back EMF

Parameter: Proportional coefficient K

Ideal mechanical moment of inertia

**Function:** represents the motor's moment of inertia

**Parameters:** Moment of inertia I

Key parameters affecting the motor model

Target

We assume that the parameters that affect motor performance: IRLK are all 1, but we have an actual motor. Obviously, the actual motor parameters cannot all be 1. We use the Simulink Design Optimization toolbox to adjust four parameters to make the simulation model and the actual motor highly matched.

Measurement data preparation

The data that needs to be measured are:

Data information is saved using Excel documents

Measurement data visualization

%Read data time=xlsread('data file','A2:A107');
speed=xlsread('data file','b2:b107');current=xlsread('data file','e2:e107');
input_v=xlsread('data file','h2:h107');

% Speed--time image subplot(2,2,1)
plot(time,speed,'r');
xlabel('Time (seconds)');
ylabel('speed');

% Current-time image subplot(2,2,2)
plot(time,current,'r');
xlabel('Time (seconds)');
ylabel('Current');

% Given value -- time image subplot (2,2,3)
plot(time,input_v,'r');
xlabel('Time (seconds)');
ylabel('given value');