Senior Embedded Motor Control & Power Electronics Engineer – BLDC/PMSM

Job Description

We are looking for a hands-on engineer to develop and prototype a high-speed sensorless BLDC motor controller for a 230 VAC professional angle grinder.

The candidate should be able to work across motor-control firmware, power electronics, inverter debugging, motor testing and prototype development.

• Strong experience in BLDC/ PMSM motor control
• Hands-on experience with sensorless six-step/trapezoidal commutation
• Good understanding of BEMF zero-crossing, startup and open-loop to closed-loop transition
• Strong Embedded C experience
• Experience with dsPIC33 / STM32 / TI C2000 or similar motor-control MCU
• Experience with 3-phase MOSFET/IGBT inverters
• Experience with 300400 VDC / mains-powered motor drives
• Strong knowledge of:
1. PWM and dead time
2. current sensing and current limiting
3. stall/locked-rotor protection
4. overcurrent, thermal and voltage protection
5. gate-driver circuits
• Strong oscilloscope and laboratory debugging skills
• Ability to independently bring a motor controller from prototype to working product

• Study and characterize an existing BLDC controller
• Develop sensorless motor-control firmware
• Optimize startup, commutation and speed control
• Implement current, stall, temperature and voltage protections
• Select and validate MOSFET/IGBT and gate-drive components
• Debug inverter and motor waveforms using oscilloscope/current probes
• Develop and test a working prototype on the actual angle-grinder motor
• Support PCB revisions and production validation

Experience in any of the following is highly preferred:

• Power tools
• Angle grinders
• High-speed BLDC motors
• Appliances
• Pumps/blowers
• Industrial motor drives

dsPIC33 motor-control experience will be a major advantage.

5+ years preferred, with demonstrated hands-on BLDC/PMSM controller development.

B.E./B.Tech/M.E./M.Tech in Electrical, Electronics, Power Electronics, Embedded Systems or related field.

This is a hands-on R&D role. Candidates should have personally developed and debugged BLDC/PMSM motor controllers, not only worked on general embedded firmware or PCB design.

BLDC, PMSM, Sensorless Motor Control, dsPIC33, STM32, TI C2000, BEMF, Six-Step Commutation, Embedded C, Power Electronics, Three-Phase Inverter, MOSFET, IGBT, Motor Drive, PWM, Current Sensing, Power Tools

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