HW4_4002

HW4_4002 - EE 4420: Homework #4 Due day: 10.25.2004 Name ....

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
EE 4420: Homework #4 Name ………………………. Due day: 10.25.2004 1. A 100 hp, 600 V, 1800 rpm, separately excited DC motor is supplied by a switch- mode PWM converter. The motor parameters are: R a = 0.1 Ω, L a = 5 mH, K E = K T = 2.86 V/(rad/s), J = 1.5 ּ 10 -3 kg ּ m 2 , B = 0.02 N ּ m/(rad/s). The converter parameters are: V d = 600 V, V tri = 5 V., f s = 33 kHz. 1) Design the current control loop with the unity feedback. Assume phase margin Φ PM,I = 90 o , and the crossover frequency f cI = 1 kHz. Find the PI controller gain k p,I and k i,I ignoring back EMF E a loop. 2) Design the speed control loop with the unity feedback. Assume phase margin Φ PM,Ω = 60 o , and the crossover frequency f = 100 Hz. Find the PI controller gain k p,Ω and k i,Ω assuming the closed-current loop to be ideal. 3) Build the block diagram of the motor with current and speed PI controllers and simulate starting of DC motor assuming the rated reference speed and zero load torque (initial conditions). After the motor reached the steady speed,
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/06/2012 for the course EE 4002 taught by Professor Scalzo during the Fall '06 term at LSU.

Ask a homework question - tutors are online