Projects / Electrical / Electrical project 38

Four-Quadrant DC Motor Chopper Drive

Approx. component budget: Rs. 8,000 - 13,000

Objective

Drive a DC motor in forward and reverse, in motoring and braking, and measure speed regulation and energy recovered during braking.

What you will build

An H-bridge chopper with MOSFET drivers, speed and current feedback, a PI controller on a microcontroller, a DC motor with a load, and a supply that can absorb or return regenerative energy.

Results you can expect

• Speed response to a step command
• Torque-speed curves in each quadrant
• Current limit response
• Energy returned during braking

What you will learn

Chopper drives, closed-loop speed control and regenerative braking, the base of EV and industrial drives.

Tools and notes

Arduino/STM32, MOSFET gate drivers, tachometer, current sensors, Excel. Use a current limit and a fuse, and a battery or capacitor bank that can accept the braking energy.

Resume points from this project

• Built and tested Four-Quadrant DC Motor Chopper Drive; objective: drive a DC motor in forward and reverse, in motoring and braking, and measure speed regulation and energy recovered during braking.
• Measured and analysed speed response to a step command and torque-speed curves in each quadrant; wrote the report and presented the results in a viva. Add your own numbers: [x].

Replace [x] with your own measured results. Write only what you really did.

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