Power Electronics Controls Engineer

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RDE Full-Time Employee Professional Merrimack, NH, US

3 days ago Requisition

Salary Range: $ To $ Annually

Job Description

Trystar’s team members are our most important asset. We are looking for a Staff Power Electronics Controls Engineer to own the control strategy, modelling, simulation, and verification that make our power conversion products stable and predictable under real use conditions, from concept through certification and production release. You will set the technical direction for the control of active front-end rectifiers, DC/DC converters, three-phase grid-tied and grid-forming inverters, and energy storage systems, including converters that operate in parallel on a shared DC bus.

You will lead stability and performance analysis as a senior individual contributor, specify how the controls run in real time, prove that hardware matches the models, and mentor the engineers who build and validate these systems with you.

Location: Merrimack, NH, or Pointe-Claire, QC, is preferred. Travel within North America up to 20%.

In this role you will:

• Define control architectures for power conversion products, including active front-end rectifiers, DC/DC converters, three-phase grid-tied and grid-forming inverters, and energy storage systems.
• Develop grid-following, grid-forming, and virtual synchronous generator (VSG) control strategies, including current and voltage regulation, droop control, virtual inertia, synchronization, and power-sharing functions.
• Develop DC-bus control strategies for converters that operate in parallel on a shared DC bus, including bus voltage regulation, droop and current sharing, stability with constant-power loads, and coordination with energy storage to meet fast load-step response.
• Create averaged, switching, small-signal, and discrete-time models of converters, plants, filters, grids, and loads using MATLAB, Simulink, and related tools.
• Design and tune inner and outer control loops using Bode plots, loop-gain and frequency-response analysis, and other established methods.
• Analyze stability margins, control interactions, resonance, weak-grid behavior, impedance characteristics, harmonics, transients, and robustness across operating conditions and component tolerances.
• Develop and validate synchronization and grid-support functions, including PLL and PLL-less methods, active and reactive power control, volt-var, volt-watt, frequency-watt, ride-through, islanding detection, black start, and seamless operating-mode transitions.
• Specify the real-time implementation of control algorithms, including sampling, discretization, computational delay, PWM, saturation, anti-windup, limit handling, numerical scaling, and protection coordination, and review the production code that embedded firmware engineers write against that specification.
• Plan and execute model-in-the-loop, software-in-the-loop, processor-in-the-loop, hardware-in-the-loop, and laboratory validation, and use frequency-response analysis and system-identification techniques to correlate models with hardware.
• Lead control-performance verification and provide test evidence for applicable standards and grid codes, such as IEEE 1547 and UL 1741, working with compliance engineers across multiple products.
• Write control requirements, architecture documents, design specifications, analysis reports, test plans, and user documentation.
• Collaborate with power electronics, magnetics, hardware, systems, firmware, test, compliance, and manufacturing engineers from concept through…