4Real AB

6 Leverantörer
6 Konsulter
- Svarsfrekvens

Michael Palmgren

Specialized in power supply
TECHNICAL COMPETENCE 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.

Erfarenhet

Incell International
Battery design
jan 2017 - nov 2018
Stockholm
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.
Li-Ion Battery Battery BMS Battery management system CLD Current Limit Device BQ-studio Mosfet Advisor

Infinera
Design & evaluation
nov 2015 - dec 2016
Stockholm
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.
Design Evaluation Surge protection DC/DC converter Orcad Capture Cadence Allegro PCB

Ericsson Power Modules
Topology investigation
dec 2014 - nov 2015
Stockholm
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.
Investigation Topology DC/DC FEM simulations PSFB LLC Report PCB

Fairchild semiconductor
Application manager
jan 2012 - nov 2014
Stockholm
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.
Applikation manager MathCad Simetrix Simplis LtSpice LLC PSFB PFC 3L-NCP

Huawei
Design
maj 2009 - jan 2012
Stockholm
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.
AC/DC Telecom Design Research SiC

Ericsson Power Modules
Development
aug 2007 - jul 2008
Stockholm
Development of two cost effective 20W DC/DC modules with multiple outputs used in telecom applications with very high volumes (300k/year).
Development DC/DC

Danaher Motion
Development
dec 2006 - apr 2009
Stockholm
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.
Development Design DC/DC Water cooled Hybrid vehicle Documentation

Ontime (Westermo)
Designer
nov 2005 - jan 2007
Stockholm
Design of synchronous DC/DC converter with extra large input voltage range 19V-154V, with military, air, train and switchgear requirements.
Design DC/DC Converter Military Air Train

Ericcson Power Modules
Advisory
apr 2005 - maj 2007
Stockholm
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.
Pre-studies Advisory DC/DC Design topology Optimization Documentation

Swedish AB
Power supply designer
feb 2005 - apr 2005
Stockholm
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.
Redesign Development Power supply Documentation

Ericsson Power Modules
Development
aug 2004 - jan 2005
Stockholm
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.
Development DC/DC Wimax Planar magnetics

Profoto
Network study
jun 2004 - sep 2004
Stockholm
Short study of 433MHz matching network between antenna and radio module.
Study Network Radio Antenna

Ericcsson Power Modules
Development DC/DC
mar 2004 - jul 2004
Stockholm
Development of extremely price optimized 15W DC/DC with 5 outputs for very high volumes. Manufacturing documentation.
DC/DC Documentation

Avitec
Development AC/DC
nov 2002 - feb 2002
Stockholm
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).
AC/DC Development PFC LVD EMC Battery Charging

Allgon Systems AB
Development
jun 2001 - okt 2002
Stockholm
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.
MCPA Development Evaluation Equalizer Pre-distorter Excel

Elektronikkonsult AB
Electronics consultant
jun 1995 - maj 2001
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).
DC/DC Power supplies

Ericsson Components AB
Design & development
jan 1990 - maj 1995
Stockholm
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.
DC/DC Power supply Design PWM Pspice ECAD

Polyamp AB
Accessory
jan 1985 - aug 1989
Stockholm
Summer intern as accessory on the designs department, final testing of DC/DC converters.
DC/DC Converters Testing

Utbildning

Plexim
Plecs workshop on Advanced Modeling and Simulation
2014

Ridley Engineering
Hands-On Power Supply Design Workshop, Ridley Engi
2009

Linear
Linear LtSpice
2008

Unitrode
Unitrode Power Supply Seminar, 1day
2007

Unitrode
Unitrode Power Supply Seminar, 1day
2006

Gateline
Orcad Capture
2005

Agilent technologies
ADS fundamentals, Agilent technologies, 3 days.
2002

CEI-Europé
RF/MW Circuit design: Linear/Non Linear Theory & A
2001

Rhode&Schwarz
Intermodulationsmätningar
1995

KTH
MScEE Design of electronics
1991
MScEE Master of Science Electronics design

Middlebrook
Structured Analog Design, Middlebrook, 3 days.
1991

SIFU Collins
Simulating power electronics with Pspice, SIFU Col
1990

Swedish military
Military service GB, KA (Karlskrona, Stockholm).
1986

Norra real Stockholm
Naturvetenskaplig kurs
1985

Rodenskolan Norrtälje
El-Teleteknisk linje
1984

Kunskaper

AC/DC
Analog simulation
Batteridesign
Batteriutveckling
Battery design
DC/DC
Elektronikkonstruktion
Kraftelektronik
Power supply

Roller

Batteridesign
Battery designer
Elektronikdesign
Power supply construction
Power supply design
Power supply development
Elektronikkonstruktör

Språk

Swedish native
English fluent

Preferenser

Heltid
Just nu

Konsultchef

Nicklas Kraft
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