Senior Power Electronics Controls Engineer (Grid Inverters)

Trystar; Merrimack (NH); On-site; USD 147,000 - 170,000; Full time

Job summary

Trystar in Merrimack, NH is seeking a Staff Power Electronics Controls Engineer to own control strategy, modelling, simulation, and verification from concept through certification and production release. You will lead stability analysis and real-time implementation for active front-end rectifiers, DC/DC converters, and grid-tied/grid-forming inverters, including energy storage systems.

Location: Merrimack, NH, with up to 20% travel in North America.

Qualifications

• Bachelor’s degree in electrical engineering or a related technical field with 10+ years of relevant industrial experience.
• Deep knowledge of AC/DC, DC/DC, and DC/AC power conversion topologies and control-oriented plant modelling.
• Expertise in classical and modern control methods, including frequency-domain analysis and multiloop control.
• Experience designing/tuning control loops for power converters and grid-connected systems.
• Experience with three-phase grid-following and grid-forming inverter controls.
• Knowledge of synchronous references, PLL-based synchronization, and weak-grid stability.
• Proficiency in real-time control implementation, sampling, PWM, and embedded firmware interfaces.
• Experience with IEEE 1547, UL 1741, and grid interconnection requirements.

Responsibilities

• Define control architectures for power conversion products including rectifiers and grid inverters.
• Develop grid-following/forming control strategies and virtual inertia concepts.
• Create DC-bus control strategies for parallel converters and energy storage coordination.
• Model converters and grids with averaged, switching, small-signal, and discrete-time models.
• Design and tune inner/outer control loops using Bode plots and frequency-response analysis.
• Analyze stability margins, impedance, harmonics, and transient responses across conditions.
• Develop synchronization and grid-support functions, including PLL variants and islanding strategies.
• Specify real-time implementation details and review embedded production code against specs.
• Lead validation programs: MIL/SIL/HIL, hardware-in-the-loop, and compliance testing.

Education

Bachelor’s degree in electrical engineering or related field

Tools

MATLAB

Simulink

Job description

Trystar in Merrimack, NH is seeking a Staff Power Electronics Controls Engineer to own control strategy, modelling, simulation, and verification from concept through certification and production release. You will lead stability analysis and real-time implementation for active front-end rectifiers, DC/DC converters, and grid-tied/grid-forming inverters, including energy storage systems.

Location: Merrimack, NH, with up to 20% travel in North America.