Senior Motor Systems Architect — High-Current BLDC

Colonial Group

Lincolnshire (IL)

On-site

USD 150,000 - 175,000

Full time

11 days ago

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Job summary

Klein Tools seeks a Lead Motor Systems Engineer to act as the technical authority for high-current BLDC and DC motor-drive systems for lithium-ion battery-powered products. Based in Ningbo with global programs, you will lead motor hardware, power electronics, embedded control, validation, supplier development, and production readiness, shaping a permanent China engineering team.

You will collaborate with cross-functional teams across hardware and firmware, define targets, and ensure safe,

Qualifications

Bachelor's degree in Electrical, Mechanical, Electromechanical, Mechatronics, or related field.
8+ years of relevant experience; at least 5 years in BLDC or motor-drive development for Li-ion systems (5 A–150 A).
System-level expertise across motor hardware, power electronics, control algorithms, and embedded firmware.
Knowledge of motor construction and windings, magnetic design, six-step commutation, FOC, SVPWM, and three-phase inverters.
Ability to develop/review embedded C/C++ firmware using STM32/Arm Cortex/DSP.
Hands-on with oscilloscopes, probes, power/logic analyzers, electronic loads, and dynamometers.
Experience with simulation, HIL testing, supplier development, and production launch in China preferred.
Fluency in Mandarin Chinese and English preferred.

Responsibilities

Lead architecture and technical direction for high-current BLDC and DC motor-drive systems.
Define torque, speed, position, power, efficiency, thermal, acoustic, duty cycle, and life targets.
Integrate motors with lithium-ion batteries, embedded controls, gearing, and mechanical loads.
Select and optimize BLDC, brushed DC, and PM synchronous motor architectures.
Evaluate winding topology, turns, wire gauge, resistance, inductance, pole count, back-EMF, Kt, and Kv.
Develop and tune six-step commutation, FOC, SVPWM, and current/torque/speed/position loops.
Develop/direct embedded C/C++ firmware on STM32, Arm Cortex, DSP, or similar.
Design/validate three-phase inverters, MOSFET stages, gate drivers, sensing, PWM, and PCB layouts.
Define protection for overcurrent, short circuit, shoot-through, voltage faults, heat, stall, rotor.
Build prototype controller boards, inverter stages, sensing circuits, and test fixtures.
Lead controller and inverter bring-up, debugging, characterization, and design validation.