Power Electronics Engineer

Omnivore; Pune District; On-site; INR 1,500,000 - 2,100,000; Full time

Job summary

Omnivore in Pune seeks an experienced firmware engineer to design and implement high-performance control software for DC-DC MPPT and DC-AC grid-tie stages, including FOC for motor loads and PLL-based grid synchronization.

You will work with MATLAB/Simulink, PLECS, and TI C2000 MCUs to optimise THD and MPPT efficiency, and ensure compliance with UL 1741 SA and IEEE 1547 through robust protection and testing.

Qualifications

• Strong background in discrete-time control for power electronics.
• Expertise in Embedded C for real-time MCUs (TI C2000).
• Experience with FOC and SVPWM for PMSM/Induction motors.

Responsibilities

• Algorithm Development: design/discrete-time control loops for DC-DC MPPT and DC-AC grid-tie stages.
• Firmware Implementation: production-ready Embedded C for Hybrid Inverter with FOC and robust PLL.
• Performance Optimisation: tune control parameters for THD and MPPT efficiency under varying irradiance.
• Grid Compliance: modify firmware to pass UL 1741 SA / IEEE 1547 tests, including anti-islanding and LVRT.
• Protection Logic: implement high-speed over-current/over-voltage/desaturation checks.
• Digital Control Theory: Z-domain analysis, PID/Lead-Lag, Bode/Nyquist stability.

Skills

Discrete-time control

Embedded C

FOC (Field Oriented Control)

Grid synchronisation

MATLAB/Simulink

Tools

TI C2000

PLECS

QEP / PWM modules

Job description

• Algorithm Development: Design and validate discrete-time control loops (Current/Voltage mode) for the DC-DC MPPT stage and DC-AC grid-tie inverter stage
• Firmware Implementation: Deliver production-ready Embedded C firmware for the Hybrid Inverter, incorporating Field Oriented Control (FOC) for motor loads and robust PLL (Phase Locked Loop) for grid synchronisation
• Performance Optimisation: Optimise control parameters to achieve Total Harmonic Distortion (THD) and MPPT dynamic efficiency under varying solar irradiance.
• Grid Compliance: Lead the firmware modifications required to pass grid interconnection certifications (UL 1741 SA / IEEE 1547), specifically testing for anti-islanding and Low Voltage Ride Through (LVRT).
• Protection Logic: Implement and verify high-speed software protection schemes (Over-current, Over-voltage, Desaturation detection) to ensure hardware safety during fault conditions.
• Digital Control Theory: Strong foundation in Z-domain analysis, compensator design (PID, PR, Lead-Lag), and stability analysis (Bode/Nyquist) for power converters.
• Embedded C Programming: Expert-level proficiency in C/C++ for bare-metal programming on Real-Time MCUs (specifically TI C2000).
• Motor Control Expertise: Proven experience implementing FOC (Field Oriented Control), SVPWM (Space Vector PWM), and sensorless observers for PMSM or Induction Motors.
• Grid-Tie Fundamentals: Deep understanding of grid synchronisation algorithms (SRF-PLL, SOGI-PLL), droop control, and active/reactive power control.
• Model-Based Design: Proficiency with MATLAB/Simulink and PLECS for system modelling, control loop simulation, and auto-code generation.
• MCU Peripherals: Hands-on experience configuring high-resolution PWM modules, ADCs (start-of-conversion triggering), and quadrature encoder interfaces (QEP).