Power Electronics Engineer

Foreseeson Technology Inc. is a multifaceted, award-winning technology innovator providing electronic manufacturing, IT security distribution, electric vehicle charging equipment, and Intelligent software platforms for EV Charger and Energy Management System. Foreseeson has experienced over 25 years of continuous growth through innovation and we are also known for pioneering green technology to lower our carbon footprint through electric vehicle charging partnerships with municipalities and corporations.
About the Project
Foreseeson Technology Inc. is developing a modular Energy Storage System (ESS) using high-voltage battery packs. The system combines battery management, power conversion, embedded control, charging and discharging coordination, and local and cloud-connected monitoring.
The project includes the evaluation and integration of power conversion equipment, with an emphasis on safe operation, independent battery control, efficient energy flow, modularity, and future product certification.
Foreseeson is seeking a Power Electronics Engineer to develop, evaluate, integrate, and validate the power conversion architecture required for the ESS prototype and its future commercial configurations..
Core accountabilities and Responsibilities
Develop and evaluate the power electronics architecture connecting battery packs, DC-DC converters, charging and power distribution modules, inverter, and AC input/output interfaces.
Define electrical requirements for voltage ranges, current limits, power ratings, conversion efficiency, operating modes, and protection coordination.
Assess suitable unidirectional and bidirectional DC-DC converter topologies for interfacing individual battery packs with the system DC bus.
Investigate approaches to operating battery packs with different states of health, available capacity, and voltage characteristics.
Evaluate off-the-shelf power conversion equipment and assess its suitability for the intended electrical, control, communication, safety, and certification requirements.
Collaborate with the Senior Electrical Engineer and Embedded Systems Engineer to define converter interfaces, control signals, telemetry, and fault-handling requirements.
Battery Charging and Power Distribution
Develop and validate power conversion requirements for charging and discharging multiple battery packs.
Evaluate charger and power distribution modules, considering compatibility, efficiency, cost, and integration risks.
Evaluate charging and discharge power limits, current sharing, converter operating windows, and battery-specific constraints.
Develop test plans for converter performance, battery-side and DC-bus behaviour, transient response, protection functions, and thermal performance.
Investigate power-flow coordination strategies that support independent battery control and efficient system operation.
Inverter and AC Output Integration
Evaluate and integrate an appropriate inverter for converting battery-side DC power to regulated AC output.
Support bidirectional power conversion where required by the selected system architecture and equipment capabilities.
Develop requirements for three-phase 208 VAC and 480 VAC outputs, including rated power, voltage and frequency regulation, load characteristics, and interface protection.
Evaluate grid-connected and backup-power operating modes, including applicable transfer, synchronization, anti-islanding, and interconnection requirements.
Verify compatibility between the inverter, battery-side converters, system controller, AC inputs, and downstream loads.
Electrical Protection, Safety, and Thermal Performance
Define and evaluate power electronics protection requirements, including overcurrent, overvoltage, undervoltage, short-circuit, overtemperature, and abnormal operating conditions.
Coordinate isolation, grounding, pre-charge, contactor sequencing, emergency shutdown, and fault-response requirements with the electrical and embedded systems teams.
Evaluate semiconductor and converter thermal performance, cooling requirements, derating, and component operating limits.
Apply high-voltage laboratory safety procedures when conducting power conversion tests.
Support electrical hazard assessments, DFMEA, risk reduction, and system-level safety reviews.
Contribute to the technical preparation required for applicable CSA, UL, IEC, and utility-interconnection assessments.
Simulation, Prototype Testing, and Validation
Use circuit simulation and engineering analysis tools such as LTspice, PSpice, MATLAB/Simulink, or equivalent to assess converter performance and operating behaviour.
Conduct or support bench and system-level testing using oscilloscopes, power analyzers, electronic loads, current and voltage probes, and suitable high-voltage test equipment.
Measure and analyze conversion efficiency