Designing 2W to 10 kW power supplies since 1991. Specialist in analog simulation. Theoretical investigation as well as practical laboratory work. Safety and emission issues according to a range of different standards. 2 years experience of RF-design. Long experience of power supply development from design to final production.
Necessary tools for power supply design:
Oscilloscope with current probes and differential probe, Network analyzer, Power supplies, Variac, Electronic Loads, DVM:s, Power meters, etc. Simetrix/Simplis, LtSpice.
Jan 2017 -
Electrical design of Li-Ion battery units including BMS (Battery Management System), CLD (Current Limit Device) and lightning protection. Test and Verification of Li-Ion Battery Units and Management circuits. BQ-studio, putty and Incell studio used for PC communication with BMS. Investigations and measurements of Mosfet switch avalanche energy when breaking inductive circuits under short circuit. Advisor in power supply and inverter related issues.
Design and evaluation of Filter board with active surge protection for surge immunity and to meet emission requirements. Design of several on board DC/DC converters used in opto products. Investigations of lightning protection. Schematic design with Orcad Capture. Layout review with Cadence Allegro PCB. Circuit simulations with SImetrix/Simplis, LtSpice and Pspice.
Investigation of suitable topology for 400V DC/DC module. FEM simulations of proximity losses in magnetics with FEMM. Simplis simulation models of LLC and PSFB (Phase shifted full bridge). Writing Application note about current sharing in high power DC/DC including development of Spice model (Simetrix). Writing report about Basic insulation and insulation strategies for designs where the planar transformer is integrated in the main PCB.
Application manager for SiC products. Loss calculations (MathCad) and simulations (Simetrix/Simplis/LtSpice) of different high power topologies including LLC, PSFB, PFC, 3L-NCP. Marketing and education of SiC products. Double pulse test for switching loss measurement of power transistors. Collaboration with modelling group to correctly model 600 V-1200 V Sic, Superjunction Mosfets and IGBTs. Application engineering.
Design of flyback housekeeping supply for 2 kW AC/DC telecom supply and also writing the schematics for this AC/DC design. Investigations about proximity losses in flyback transformers and inductors. Design of 400W 48V DC/DC supply with digital control and secondary side active clamp and writing patent application for this. Writing report about electrical safety. Research study comparing SiC switches with Si in 5kW PFC design.
Ericsson Power Modules
Aug 2007 -
Development of two cost effective 20W DC/DC modules with multiple outputs used in telecom applications with very high volumes (300k/year).
Dec 2006 -
New development of a 5kW and a 7.5kW water cooled DC/DC converter for use in electrical hybrid vehicles. Development of the internal supplies for other electronics used within the vehicle. Interpretation and implementation of safety standards. Design meet very high RF-emission requirements. Magnetic design and specification. System simulations. Manufacturing documentation.
Design of synchronous DC/DC converter with extra large input voltage range 19V-154V, with military, air, train and switchgear requirements.
Ericcson Power Modules
Apr 2005 -
Qualified pre-studies of several custom specified DC/DC modules for very high volumes. Advisory for choice of design topology. Design of cost optimized synchronous flyback module with dual 1.8/3.3V outputs. Manufacturing documentation.
Redesign of custom specified power supply. Customer required higher efficiency and a new output. Evaluation and corrections of the old design. Support to manufacturing facility. Manufacturing documentation.
Ericsson Power Modules
Aug 2004 -
Qualified development of compact 80W DC/DC module with multiple outputs for use in Wimax equipment. Planar magnetics. High efficiency. Very high conducted emission requirements.
Jun 2004 -
Short study of 433MHz matching network between antenna and radio module.
Ericcsson Power Modules
Mar 2004 -
Development of extremely price optimized 15W DC/DC with 5 outputs for very high volumes. Manufacturing documentation.
Nov 2002 -
Development of 300W custom specified AC/DC with PFC and high transient capability on the input. Battery charging and surveillance. LVD questions and investigations (safety and EMC).
Allgon Systems AB
Jun 2001 -
Development of MCPA, linear feed forward PA 2,14-2,17 GHz. Evaluation of vector-modulators, isolators, couplers, hybrids, PA:s, equalizers, pre-distorters. Design of matching networks and temperature compensation circuits. Link-budget for MCPA with Syscalc and Excel. Simulations with ADS and MWOffice.
Consultant , development of power supplies and novel RF-designs. DC/DC converters and power systems 2-1000W. On board power supplies for RBS. Planar transformers. EMC issues. Verification and redesign of NMT-450 equipment. Design of 1-3 Wilkinson splitter for 1900 MHz med LP filter. Design of ”bias-T” for mast mounted PA. Measurement with network analyzer and spectrum analyzer. Simulations med Pspice and Eagleware (RF-simulator).
Ericsson Components AB
Design & development
Jan 1990 -
Design and development of 6-50W DC/DC Power supplies. Specification and design of silicon control-IC (PWM, Error amp) for switched mode power supplies. Specialist in simulation with Pspice. ECAD administrator and user.
Jan 1985 -
Summer intern as accessory on the designs department, final testing of DC/DC converters.
Plecs workshop on Advanced Modeling and Simulation
Hands-On Power Supply Design Workshop, Ridley Engi
Unitrode Power Supply Seminar, 1day
Unitrode Power Supply Seminar, 1day
ADS fundamentals, Agilent technologies, 3 days.
RF/MW Circuit design: Linear/Non Linear Theory & A
MScEE Design of electronics
MScEEMaster of ScienceElectronics design
Structured Analog Design, Middlebrook, 3 days.
Simulating power electronics with Pspice, SIFU Col