To maintain a fixed output current in a 3-phase Interleaved Buck Converter, you need a current control strategy that ensures phase balancing and dynamic response. Here are the most common methods:

⚙️ Control Methods:

1. Current Mode Control (CMC):

Uses real-time sensing of each phase’s inductor current.

A feedback loop adjusts the duty cycle based on current error (actual vs. reference).

2. Average Current Control:

A PI/PID controller ensures the average output current matches the setpoint.

Preferred in high-precision power systems like battery chargers and motor drives.

3. Digital Control (MCU or DSP-based):

Measures current via ADCs and applies digital compensation algorithms.

Enables advanced control techniques like current balancing, adaptive control, etc.

4. Interleaving Logic & Phase Synchronization:

Ensures each phase operates 120° out of phase, reducing input/output ripple.

Improves efficiency and thermal management.

📌 Tips:

Use current sharing circuitry or digital estimators to ensure load balance between phases.

Consider integrating overcurrent and thermal protections in the control firmware.

📚 Recommended Sources:

Erickson & Maksimovic, "Fundamentals of Power Electronics."

Texas Instruments: "Interleaved Buck Converter Design and Control Using C2000™ MCU."

This s not the university that I worked with. I am still loking for a university to accept my thesis.

Use Direct Torque Ccontrolled inverters to drive permanent magnet 3-phase AC traction motors to each bogie wheel.

I recommend that you use a Direct Controlled inverter to drive permanent magnet three phase motors.

I am still looking for a university to accpt my thesis.

Bernard Schaffler. I now live in Sydney Australia but my development was done in Erie Pennsylvania, USA.