代做MEEK16104 ELECTRICAL MACHINES AND DRIVES Lab2代写Matlab语言

日期：2024-07-01 05:39

MEEK16104

ELECTRICAL MACHINES AND DRIVES

Lab2

Design of DC motor speed control techniques using

MATLAB/SIMULINK

Aim

The aim of this experiment is to design, simulate and compare the different speed control techniques of a DC motor.

Objectives

The main objectives are:

•   To design and simulate different speed control techniques of a DC motor. These techniques include three most common speed control methods, namely field resistance control, armature voltage control, and armature resistance control. The thyristorized techniques include using power electronic converters (Half converter, semi converter and full converter) to control the voltages.

•   Make a comparative analysis of the different speed controller techniques.

Equipment and Materials

MATLAB/SIMULINK software.

Procedure

1. Find the input DC Motor in the component library of simulink, find the DC motor model, and drag it into the simulation interface, as shown in the following figure:

 

2. The selected DC motor parameters are shown in the figure below:

3. Build and analyze the following four simulation models: A, B, C, and D: A. The DC motor is directly connected to the resistance to start the control. The built simulation model is shown in the following figure:

The maximum load torque is calculated as follows:

Under different load torques, the speed conditions are simulated respectively, as shown in the following table:

No.

Load torque (Nm)

Rotor Speed (rad/s)

Remarks

		RF1=150Ω	RF2=300Ω
1	1	379	553
2	2	377	548
3	4	373	540
4	5	371	535
5	6	369	531
6	8	365	522
7	9	363	518
8	10	361	513
9	12	357	505
10	13	355	500
11	14	353	496
12	16	349	487
13	18	345	478
14	20	340	469

The torque-speed characteristics of different field resistances are shown in the following figure:

The speed waveform. is shown in the following figure:

The current waveform. is shown in the following figure:

B. DC motor with armature voltage start control

The built simulink simulation model is shown in the following figure:

The maximum load torque is calculated as follows:

Under different armature voltages, the speed conditions are simulated respectively, as shown in the following table:

No.	Load torque (Nm)	Rotor Speed (rad/s)			Remarks
		VA1 = 240 V	VA2 = 200 V	VA3 = 300V
1	1	193	161	241
2	2	192	160	240
3	4	191	160	240
4	5	190	159	239
5	6	189	158	239
6	8	188	157	239
7	9	188	157	238
8	10	188	156	237
9	12	187	155	236
10	13	187	155	236
11	14	186	154	235
12	16	185	153	235
13	18	184	152	233
14	20	183	151	232

The torque-speed characteristics at different armature voltages are shown in the figure below:

The speed waveform. is as follows:

The current waveform. is as follows: