Engineering projects and applied research: power conversion, resonant electronics and experimental verification
Micro Digital Engineering works on electronic systems in which circuit architecture, electromagnetic behaviour, control and measurement have to be developed together. Alongside the development, redesign and verification of industrial electronics, our engineering work extends into resonant and high-frequency circuits. Client development work is confidential, so this page describes the engineering problems we work on and the established scientific foundations behind them, not client case studies.
Discuss your engineering project
Confidential task? We sign an NDA before you share technical files.
01 · Power conversion and control
Conversion architectures
AC-DC and DC-DC conversion, switching and resonant topologies, and the choice of architecture for the input range, load profile, efficiency and isolation the equipment requires.
Magnetic components
Coupled inductors and transformers, and the specifications that make their behaviour predictable in the power stage.
Control, protection and load behaviour
Control loops, start-up and shutdown, protection functions and the behaviour of the power stage as the load changes.
Losses and thermal behaviour
Electrical and thermal losses estimated in design and measured on the prototype under load.
Prototype assembly and verification
Power prototypes assembled in-house, brought up in steps and verified by measurement against the test plan.
These are the same engineering disciplines as our power electronics design service.
02 · Resonant and high-frequency electronics
Our engineering work extends beyond conventional power conversion into coupled resonant circuits, Tesla-type resonators and nonlinear electromagnetic systems. This includes the investigation of frequency-dependent behaviour, resonant coupling, energy transfer, control and experimental characterisation.
- Coupled LC circuits and distributed resonant structures.
- Frequency-dependent and load-dependent behaviour, phase relationships and stability.
- High-frequency voltage and current waveforms, and the losses that limit them.
- Energy transfer between coupled resonant circuits.
- Parametric excitation, where a circuit parameter is varied over time and changes the resonant response.
- Comparison of measured behaviour with theoretical models.
Resonance can store oscillatory energy, raise voltages and change how energy is transferred between circuits; the complete system, including the energy supplied through its ports, remains subject to conservation of energy.
03 · Experimental verification
Engineering hypotheses are evaluated through measurable behaviour. Our laboratory work includes waveform analysis, voltage and current measurements, frequency characterisation, load tests and the comparison of observed results with the defined operating conditions.
Our laboratory performs electrical measurements, waveform analysis and functional verification using calibrated measurement equipment. All measurement instruments have undergone calibration (etalonare) and are supported by calibration certificates. The applicable measurement ranges and test conditions are defined according to the engineering task.
An established physical mechanism and the experimental verification of a particular implementation are treated as two different things: the first is documented in the literature, the second has to be measured.
Scientific foundations
The areas above rest on established circuit theory and published research. These references document the physical mechanisms; they are not an independent confirmation of the results of any particular development.
- Kazimierczuk, M. K., Czarkowski, D. Resonant Power Converters, 2nd ed. Wiley-IEEE Press, 2011.
- Erickson, R. W., Maksimović, D. Fundamentals of Power Electronics, 3rd ed. Springer, 2020.
- Kurs, A. et al. Wireless Power Transfer via Strongly Coupled Magnetic Resonances. Science, 317, 83–86, 2007.
- Louisell, W. H. Coupled Mode and Parametric Electronics. Wiley, 1960.
- Corum, K. L., Corum, J. F. RF Coils, Helical Resonators and Voltage Magnification by Coherent Spatial Modes. TELSIKS, 2001.
- Strogatz, S. H. Nonlinear Dynamics and Chaos, 2nd ed. Westview Press, 2015.
04 · Engineering services
The same engineering work is available as defined services:
- Power electronics design — converters, inverters, power supplies and drivers.
- Schematic and PCB design — power, control and high-frequency boards.
- Embedded firmware and control — control and protection logic.
- Electronics troubleshooting and design review — failures, instability, overheating.
- Functional test benches and fixtures — test and measurement set-ups.
Confidential engineering work
Client designs, circuit architectures, technical documentation and test results are protected by confidentiality agreements and intellectual property rights. We therefore describe engineering disciplines and publicly established scientific foundations without exposing project details. Engineering examples are published only with the client’s permission. See project confidentiality and NDA.
Discuss an engineering project
If your company is developing a power conversion system, a resonant circuit, a specialised electronic device or a measurement set-up, describe the engineering task and the result you need. We will review the requirements and propose a defined first engineering stage.
Discuss your engineering project
Confidential task? We sign an NDA before you share technical files.