Motor Electromagnetic Design Engineer, Robotics

Dexmate Inc.; Fremont (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

Dexmate Inc. is seeking a Motor Electromagnetic Design Engineer in Fremont, CA to develop PMSM and BLDC motors for integrated robot actuators.

You will own the electromagnetic design from topology and sizing through prototype characterization, collaborating with mechanical, thermal, and drive engineers to meet packaging and duty-cycle limits. You will evaluate motor topologies, design windings and magnets, run FEA analyses, and coordinate with suppliers and prototype builds to validate

Qualifications

• Hands-on electromagnetic design experience with PMSM or BLDC motors.
• Strong understanding of winding design, magnetic circuits, materials, loss mechanisms and torque production.
• Proficiency in an electromagnetic design or FEA tool such as Motor-CAD, JMAG, Ansys Maxwell, Flux or an equivalent workflow.
• Ability to connect simulation to test data and work directly with mechanical, thermal, inverter and manufacturing engineers.

Responsibilities

• Evaluate motor topologies and size active materials for torque‑speed, efficiency and mass.
• Design slot and pole combinations, winding layouts, magnets, laminations and air gaps; evaluate saturation and torque ripple.
• Build electromagnetic FEA models and report assumptions and properties.
• Co‑design the motor with thermal and mechanical engineers, accounting for heat paths and manufacturability.
• Work with drive and firmware engineers on motor parameters, bus voltage and current limits.
• Support suppliers and prototype builds; characterize motors on bench or dynamometer and compare with predictions.

Skills

PMSM/BLDC design

EM design experience

Winding design

FEA tools

Tools

Motor-CAD

JMAG

Ansys Maxwell

Flux

Job description

About Dexmate

Dexmate is building robot platforms and a universal Physical AI OS to make robots easier to build and deploy. We combine hardware and software into a plug-and-play platform for developers, researchers and enterprises, with an open ecosystem that supports the development of physical AI.

The Role

We are looking for a Motor Electromagnetic Design Engineer to develop PMSM and BLDC motors for integrated robot actuators. You will own the electromagnetic design from topology and sizing through prototype characterization, working with mechanical, thermal and drive engineers to deliver performance within the actuator’s real packaging, voltage, current and duty-cycle limits.

Responsibilities

• Evaluate motor topologies and size active materials for required torque‑speed performance, efficiency and mass, including frameless or outrunner configurations where appropriate.

• Design slot and pole combinations, winding layouts, magnets, laminations and air gaps; evaluate saturation, losses, cogging torque and torque ripple.

• Build electromagnetic FEA models and analytical checks; document assumptions, material properties and sensitivity to manufacturing tolerances.

• Co‑design the motor with thermal and mechanical engineers, accounting for heat paths, retention, clearances, assembly and manufacturability.

• Work with drive and firmware engineers on motor parameters, bus voltage, current limits, back‑EMF and operating envelopes before design release.

• Support suppliers and prototype builds; characterize motors on the bench or dynamometer and correlate measured constants, torque, efficiency and temperature to predictions.

Minimum Qualifications

• Hands‑on electromagnetic design experience with PMSM or BLDC motors, including a design that was built and experimentally characterized.

• Strong understanding of winding design, magnetic circuits, materials, loss mechanisms and torque production.

• Proficiency in an electromagnetic design or FEA tool such as Motor‑CAD, JMAG, Ansys Maxwell, Flux or an equivalent workflow.

• Ability to connect simulation to test data and work directly with mechanical, thermal, inverter and manufacturing engineers.

Preferred Qualifications

• Experience with frameless, outrunner, high torque‑density or low‑cogging motors for robotics, servos, drones or EV traction.

• Experience optimizing winding manufacture, magnet retention, lamination production or motor assembly with suppliers.

• Python or MATLAB for design sweeps, data analysis and model correlation.