Four-quadrant motor operation in Power Electronics - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the quadrant where the motor operates with positive torque and positive speed.

Power Electronics

if torque > 0 and speed > 0:
    quadrant = [1]

Drag options to blanks, or click blank then click option'

AQuadrant 2

BQuadrant 1

CQuadrant 3

DQuadrant 4

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing the quadrant numbers with torque or speed signs.

Assuming negative torque means forward motion.

The first quadrant corresponds to positive torque and positive speed, meaning the motor is driving forward.

2fill in blank

medium

Complete the code to identify the quadrant where the motor operates with negative torque and positive speed.

Power Electronics

if torque < 0 and speed > 0:
    quadrant = [1]

Drag options to blanks, or click blank then click option'

AQuadrant 2

BQuadrant 1

CQuadrant 3

DQuadrant 4

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up torque and speed signs.

Thinking negative torque always means reverse motion.

The second quadrant corresponds to negative torque and positive speed, indicating the motor is braking while moving forward.

3fill in blank

hard

Fix the error in the code to correctly identify the quadrant for negative torque and negative speed.

Power Electronics

if torque < 0 and speed < 0:
    quadrant = [1]

Drag options to blanks, or click blank then click option'

AQuadrant 1

BQuadrant 2

CQuadrant 3

DQuadrant 4

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning the wrong quadrant number for reverse driving.

Confusing quadrant 3 with quadrant 4.

The third quadrant corresponds to negative torque and negative speed, meaning the motor is driving in reverse.

4fill in blank

hard

Fill both blanks to identify the quadrant and the motor state when torque is positive and speed is negative.

Power Electronics

if torque > 0 and speed < 0:
    quadrant = [1]
    state = '[2]'

Drag options to blanks, or click blank then click option'

AQuadrant 4

BQuadrant 2

CMotoring

DBraking

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up motoring and braking states.

Confusing quadrant 4 with quadrant 2.

Quadrant 4 corresponds to positive torque and negative speed, indicating the motor is braking while moving in reverse.

5fill in blank

hard

Fill all three blanks to create a function that returns the quadrant name based on torque and speed signs.

Power Electronics

def get_quadrant(torque, speed):
    if torque > 0 and speed > 0:
        return [1]
    elif torque < 0 and speed > 0:
        return [2]
    else:
        return [3]

Drag options to blanks, or click blank then click option'

A"Quadrant 1"

B"Quadrant 2"

C"Quadrant 3"

D"Quadrant 4"

Attempts:

3 left

💡 Hint

Common Mistakes

Returning wrong quadrant names for given conditions.

Not using quotes around quadrant names.

This function returns the correct quadrant name based on the signs of torque and speed for the first three quadrants.