Current mode control in Power Electronics - Mini Project: Build & Apply

Current Mode Control Basics

📖 Scenario: You are designing a simple power converter circuit that uses current mode control to regulate the output current. This control method helps keep the current stable and protects the circuit from overload.

🎯 Goal: Build a step-by-step understanding of current mode control by creating a simple data model representing the current, setting a reference current, applying the control logic, and completing the control loop setup.

📋 What You'll Learn

Create a variable to hold the measured current value

Create a variable for the reference current setpoint

Implement a simple control logic comparing measured current to reference

Complete the control loop by defining the output control signal

💡 Why This Matters

🌍 Real World

Current mode control is widely used in power converters to maintain stable current and protect circuits from damage.

💼 Career

Understanding current mode control is essential for engineers working in power electronics design, embedded systems, and hardware control.

1

Set up the measured current variable

Create a variable called measured_current and set it to the value 2.5 representing the current in amperes.

Power Electronics

# Create a variable called measured_current and set it to 2.5
# Your code here

Need a hint?

Think of measured_current as the current sensor reading in your circuit.

2

Set the reference current

Create a variable called reference_current and set it to the value 3.0 representing the desired current setpoint in amperes.

Power Electronics

measured_current = 2.5
# Create a variable called reference_current and set it to 3.0
# Your code here

Need a hint?

The reference_current is the target current your control system tries to maintain.

3

Apply the control logic

Create a variable called error that calculates the difference between reference_current and measured_current using the expression reference_current - measured_current.

Power Electronics

measured_current = 2.5
reference_current = 3.0
# Calculate error as reference_current minus measured_current
# Your code here

Need a hint?

The error shows how far the actual current is from the desired current.

4

Complete the control loop output

Create a variable called control_signal and set it equal to error. This represents the output signal that will adjust the power converter to correct the current.

Power Electronics

measured_current = 2.5
reference_current = 3.0
error = reference_current - measured_current
# Set control_signal equal to error
# Your code here

Need a hint?

The control_signal will be used to adjust the converter to keep the current at the reference value.