Internship - Innovative Current Measurement Method

**About H55**

As the technological spin-off of Solar Impulse, the first electric airplane to fly around the world, the mission of H55, is to make aviation clean, safe, and affordable.

The company’s strengths and competencies lie in developing propulsion and energy storage solutions which are modular, lightweight, and certifiable.

Having integrated and flown 4 electric airplanes, the Swiss start-up has been selected by Pratt & Whitney Canada to provide the battery pack for its regional hybrid-electric flight demonstrator. This recent announcement is a further illustration of H55’s position as a major enabler in the electric commuter market.

**Context**

In the scope of its product development, the company must have the ability to sense high currents in a low-dissipative way with high bandwidth and high accuracy. Solutions are already existing on the market but are far from ideal (Bulkiness, limited performances, high power consumption).

Nowadays, solution arise to provide current measurement means directly integrated in ICs and sensing the magnetic field produced by a busbar passing close by. They would allow to significantly reduce the volume of the current sensors and to improve the electrical performances.

In the frame of an internship, H55 would like to explore those new technologies prior integrating them in a product. The objective is to explore the technology, quantify the performances and produce a prototype that will be tested in laboratory.

**Your Role**

The perimeter of the internship will be:

- Benchmarking of the solutions currently available on the market
- Selection of the most appropriate to our use case (BW, accuracy, offset compensation )
- Selection of the best integration method for the sensor and busbar assembly (Separated busbar and sensor or a solution based on a PCB embedding the busbar and the sensor)
- Assessment of the global accuracy depending on the variability of the acquisition chain, manufacturing tolerances, environmental conditions(Certainly assisted by electromagnetic simulation)
- Design and production of a prototype
- Validation of the performances in lab testing
- Based on the outcomes of the study, provide guidelines about the deployment of those technologies in a product development.

**Your Profile**
- Master’s student in electrical engineering
- Notion or interest for:

- Analogue and digital electronics
- Electromagnetic simulation
- PCB technology
- Familiar with lab equipment (Oscilloscope, power supply, active load, network analyser)
- Ability to understand and debug embedded hardware
- Fast learner, rigorous, hands-on problem-solving, ability to document properly
- Fluency in English (oral and written), French an asset.

**Additional Information**
- Work Location: Sion, Switzerland
- Entry Date: immediately
- Start May 2023
- Duration: 6 months

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