Soft starter for motors in Power Electronics - Mini Project: Build & Apply

Soft Starter for Motors

📖 Scenario: You are an electrical engineer working on a project to control the starting of an industrial motor. To protect the motor and reduce mechanical stress, you need to design a soft starter system that gradually increases the motor voltage during startup.

🎯 Goal: Build a step-by-step understanding of how a soft starter works by creating a simple model that simulates the gradual voltage increase to the motor during startup.

📋 What You'll Learn

Create a data structure to represent motor voltage levels during startup

Add a configuration variable to set the maximum voltage

Implement the logic to gradually increase voltage in steps

Complete the model by defining the final voltage level after startup

💡 Why This Matters

🌍 Real World

Soft starters are used in industry to protect motors and equipment by reducing the electrical and mechanical stress during motor startup.

💼 Career

Understanding soft starters is important for electrical engineers and technicians who design, install, or maintain motor control systems.

1

Create initial voltage levels list

Create a list called voltage_levels with these exact values representing voltage percentages during motor startup: 0, 20, 40, 60, 80.

Power Electronics

# Create the voltage_levels list with the specified values
# Your code here

Need a hint?

Use square brackets to create a list and separate values with commas.

2

Set maximum voltage configuration

Add a variable called max_voltage and set it to 100 to represent the full motor voltage percentage.

Power Electronics

voltage_levels = [0, 20, 40, 60, 80]
# Set max_voltage to 100
# Your code here

Need a hint?

Assign the number 100 to the variable max_voltage.

3

Add final voltage level to the list

Append the max_voltage value to the voltage_levels list to represent the motor reaching full voltage after startup.

Power Electronics

voltage_levels = [0, 20, 40, 60, 80]
max_voltage = 100
# Append max_voltage to voltage_levels
# Your code here

Need a hint?

Use the append() method to add max_voltage to voltage_levels.

4

Define final voltage level variable

Create a variable called final_voltage and set it to the last value in the voltage_levels list to represent the motor's voltage after startup.

Power Electronics

voltage_levels = [0, 20, 40, 60, 80]
max_voltage = 100
voltage_levels.append(max_voltage)
# Set final_voltage to the last item in voltage_levels
# Your code here

Need a hint?

Use negative indexing to get the last item from voltage_levels.