Power Electronics & Motor Drives Engineer — PhD/Postdoctoral Development Programme

Novomorphic Ltd.; Cardiff; On-site; GBP 65,000 - 90,000; Full time

Benefits offered by this job

28 days annual leave

Salary sacrifice pension

Annual discretionary bonus

Life assurance

Private medical insurance

Tailored benefits

Job summary

Novomorphic Ltd. seeks a PhD-level engineer to join a structured industry development programme focused on high-performance motor drives. You will work across GaN power stages and FPGA-based control, transitioning designs from architecture to hardware validation at Novomorphic's Cardiff site.

You will develop deep expertise in GaN inverter design, motor control with FOC, and FPGA implementation while collaborating with researchers and partners to deliver robust, deterministic drive systems.

Qualifications

• PhD in power electronics or closely related field completed or near completion.
• Strong understanding of three-phase inverter operation, gate drives and DC-link behaviour.
• Experience with BLDC/PMSM drives and SVPWM.
• Practical lab experience with power electronics and oscilloscope debugging.
• Ability to communicate technical decisions, risks and test results clearly.

Responsibilities

• Design GaN inverter architectures for BLDC and PMSM drives.
• Define gate-driver architecture, isolation, biasing, safe switching.
• Develop FPGA-based FOC and SVPWM; ensure timing and control loop integrity.
• Integrate motor-twin outputs with hardware platform and firmware.
• Lead system integration, test planning and technical risk management.

Skills

Power electronics

Motor drives

FPGA control

Lab debugging

Education

PhD in power electronics or related field

Tools

MATLAB/Simulink

FPGA toolchains

Oscilloscopes

Job description

Company Overview

Novomorphic is a new semiconductor design venture backed by Cadence Design Systems, Welsh Government, and CSA Catapult. We have been established to build critical semiconductor design capability in the UK.

Our focus is advanced integrated circuit and electronic system design, with particular strength in low-power intelligent hardware, edge AI, digital design, analogue and mixed-signal systems, and compound semiconductor technologies.

We are building Novomorphic from the ground up. That means every person who joins us will help shape the company, its technical capability, and its culture. We value technical excellence, ownership, curiosity, collaboration, and practical delivery.

The Opportunity

This is not a conventional graduate role. It is a structured industry development programme for a PhD-level engineer or researcher who wants to build deep expertise in high-performance motor drives, GaN power electronics and deterministic FPGA control.

You will help deliver Novomorphic's adaptive GaN drive and FPGA-based motor‑control platform, taking designs from system architecture and analysis through power‑stage bring‑up, closed‑loop control and full hardware validation.

The role is commercially grounded and hands‑on. It suits someone with strong research capability who wants to solve real engineering problems where safety, efficiency, control stability, pace and practical delivery matter.

Role Overview

You will work across the boundary between a three‑phase GaN inverter and the BLDC/PMSM control system that drives it. Your core focus will be inverter behaviour, gate drive, sensing, protection and motor‑control performance, with particular emphasis on FPGA‑based field‑oriented control.

Novomorphic must be expert in motor drives, but this role is not for detailed electromagnetic motor design. You will use motor parameters and motor‑twin outputs, diagnose real drive behaviour and work with separate FPGA/firmware, analogue and mixed‑signal, systems, PCB and motor‑domain specialists.

What You Will Do

GaN Power Stage and Gate Drive

• Design, analyse and validate three‑phase GaN inverter architectures for BLDC and PMSM drives.
• Select and characterise GaN devices, gate drivers, DC‑link components and supporting power‑stage components.
• Define gate‑driver architecture, isolation, biasing, safe switching and shutdown behaviour.
• Optimise dead time while preventing shoot‑through across operating conditions and device variation.
• Analyse switching transients, ringing, parasitic effects, dv/dt, di/dt and common‑mode behaviour.
• Define and review EMC, gate‑loop, commutation‑loop and high‑speed switching layout constraints with PCB implementation partners.
• Estimate and measure conduction and switching losses, inverter efficiency and the practical benefit of GaN devices.
• Assess junction, case and board temperatures and support thermal design and full‑load validation.

Sensing, Protection and Power‑Stage Bring‑up

• Define and integrate phase‑current, DC‑bus voltage and temperature sensing into the control platform.
• Specify ADC front‑end performance, bandwidth, filtering, scaling, isolation and signal‑integrity needs.
• Develop over‑current, over‑voltage, under‑voltage, over‑temperature, shoot‑through prevention, interlock and controlled shutdown behaviour.
• Plan and execute safe staged power‑up, low‑voltage testing, double‑pulse testing and progression to full‑load operation.
• Use oscilloscopes, differential probes, current probes, power analysers and thermal measurement equipment to debug real hardware.
• Investigate faults methodically and document limits, assumptions, test evidence and corrective actions.

Motor Control and FOC

• Develop and validate field‑oriented control for BLDC and PMSM machines.
• Implement and verify Clarke and Park transforms, d/q current control, speed and torque control, PI regulators and anti‑windup.
• Develop SVPWM and PWM strategies for deterministic control operation at up to 100 kHz, subject to system requirements.
• Define ADC and PWM synchronisation, current‑sampling points, rotor‑angle handling and control‑loop timing.
• Apply motor parameters including R_s, L_d, L_q and flux linkage to controller configuration, simulation and validation.
• Manage current, voltage and modulation limits, saturation, start‑up, transient response and fault recovery.
• Analyse stability, torque ripple, speed response, parameter variation and operating‑point sensitivity.

FPGA and System Integration

• Translate control algorithms into deterministic, fixed‑point architectures suitable for FPGA implementation.
• Define word lengths, scaling, latency, pipelining, resource use, numerical limits and verification tolerances with the FPGA team.
• Integrate motor‑twin outputs and adaptive‑control algorithms supplied by research and project partners into Novomorphic's hardware abstraction and control platform.
• Support hardware‑in‑the‑loop, bench and dynamometer testing across firmware, FPGA, sensing and power‑stage interfaces.
• Contribute to system architecture, requirements, interface definitions, design reviews, test plans and technical risk management.
• Take increasing ownership of design decisions and technical delivery, progressing towards independent technical ownership within 6–12 months.

Drive‑System Diagnosis

• Diagnose oscillation, torque ripple, incorrect current, poor efficiency and unstable transient behaviour on real motor‑drive hardware.
• Separate root causes arising from controller tuning, motor parameters, PWM timing, current measurement, rotor angle, saturation, voltage limits, dead time or the power stage.
• Use measured evidence to close the loop between simulation, FPGA behaviour, analogue signals and power‑stage performance.

What You Will Develop

• Deep capability in GaN three‑phase inverter design, gate drive, dead‑time optimisation, switching‑loss analysis, sensing and protection.
• Deep capability in FPGA‑based FOC, d/q current control, SVPWM, loop tuning, timing and stability validation.
• Strong practical judgement in thermal behaviour, EMC constraints, parasitics and high‑speed switching layout review.
• The ability to take a real inverter from first power‑on through closed‑loop operation to safe full‑load validation.
• System‑level ownership across power electronics, analogue sensing, FPGA control, firmware and motor behaviour.

What We Are Looking For

We are looking for a practical PhD-level engineer with a strong grounding in power electronics and motor drives. You may be deeper in either GaN power‑stage engineering or motor control today, but you must be able to work credibly across the complete drive system and develop depth at the interface between the two.

Essential Requirements

• A completed or near‑completion PhD in power electronics, electrical or electronic engineering, motor drives, control engineering, or a closely related field.
• Strong understanding of three‑phase inverter operation, switching devices, gate drives, dead time, protection and DC‑link behaviour.
• Strong understanding of BLDC/PMSM drives and field‑oriented control, including Clarke/Park transforms, d/q current loops, PI control and SVPWM.
• Practical laboratory experience with power electronics or motor‑drive hardware, including safe bring‑up and oscilloscope‑based debugging.
• Ability to analyse control‑loop stability, switching behaviour, sensing errors and interactions between the control system and power stage.
• Working knowledge of motor parameters, torque/speed behaviour and how model assumptions affect real drive performance.
• Understanding of deterministic digital control and fixed‑point implementation constraints.
• Ability to communicate technical decisions, assumptions, risks and test results clearly.
• A practical approach to safe engineering, documentation and delivery in a multi‑disciplinary team.

Desirable Experience

• Hands‑on GaN device characterisation, double‑pulse testing or high‑speed switching measurement.
• Design or validation of gate drivers, isolated supplies, hardware comparators or protection circuits.
• Fixed‑point FOC implementation in FPGA, SoC FPGA, DSP or real‑time embedded hardware.
• ADC/PWM synchronisation and current reconstruction for low‑inductance, high‑switching‑frequency drives.
• Motor‑twin, model‑in‑the‑loop, software‑in‑the‑loop or hardware‑in‑the‑loop workflows.
• Adaptive control, online parameter estimation or automatic dead‑time optimisation.
• EMC investigation, parasitic extraction, thermal modelling, dynamometer testing or power‑analyser measurements.
• Requirements capture, design assurance or verification within an industrial research and development programme.

Tools and Environments

Relevant experience may include MATLAB/Simulink, PLECS, LTspice or similar circuit and system simulation tools; VHDL, Verilog or SystemVerilog; FPGA vendor toolchains; Python; oscilloscopes, differential and current probes, power analysers, electronic loads, motor dynamometers and thermal measurement equipment. Exact tools are useful, but sound engineering judgement and the ability to learn new environments matter more.

Scope Boundary

This role requires expertise in motor drives: control, inverter design, sensing, protection, FPGA, firmware, GaN integration and hardware validation. Detailed electromagnetic motor design is not a core requirement. Stator and rotor geometry, winding and magnet design, electromagnetic FEM, detailed loss‑map generation and machine mechanical design sit outside Novomorphic's main scope.

We Value Engineers Who

• Take ownership and follow through.
• Enjoy solving difficult technical problems.
• Are curious, practical, and willing to learn quickly.
• Can work independently without disappearing into a silo.
• Collaborate well with people from different disciplines.
• Communicate clearly, especially when raising risks or blockers.
• Are comfortable in a start‑up environment where priorities can move quickly.
• Want to build real semiconductor capability, not just write papers.

What Success Looks Like

• You understand the architecture, safety case, interfaces and test plan for Novomorphic's GaN motor‑drive platform.
• You can bring up and instrument the inverter safely, explain its switching behaviour and identify the main loss and thermal drivers.
• You can configure, tune and validate the FOC current loops and diagnose unstable or incorrect motor behaviour using measured evidence.
• You contribute reliable fixed‑point control requirements and verification evidence for FPGA implementation.
• You work effectively across power electronics, analogue, FPGA, firmware, systems and external project partners.
• Within 6–12 months, you progress towards independent technical ownership of defined motor‑drive work packages.

Why Join Novomorphic?

You will help build a core UK capability in compound‑semiconductor power electronics and intelligent motor control. The role offers unusual breadth: device switching, analogue sensing, real‑time control, FPGA implementation and complete drive‑system validation.

You will work on real hardware and help shape the architecture, engineering methods and technical culture of a growing semiconductor design company.

Benefits

Novomorphic's benefits package includes:

• 28 days' annual leave plus bank holidays
• Salary sacrifice pension scheme
• Annual discretionary bonus scheme
• Life assurance
• Private medical insurance
• Additional benefits tailored to employee needs

Location and Working Model

This role is based in Cardiff, Wales. Working arrangements may vary depending on project and business requirements.

Candidates must have the right to work in the UK or be eligible for sponsorship, where applicable.