We are power electronics design specialists. ELMG expertise in converter design spans from 2W to 15MVA and includes all types of converters from small switch-modes to large mains connected converter systems and motor drives. We design power converters using MOSFETs, BJTs, IGBTs and Thyristors. We have solid expertise in the design of base and gate drive systems for all these devices.
ELMG design expertise in power electronics design includes low voltage, less than 1500V, power electronics and high voltage, 1500V to 25kV, power electronics. All power converters designed are typically designed to meet one or more of EMC, Low Voltage Directive, UL or CSA compliance requirements.
We have solid experience with controllers for power electronics.
The complete digital control of power electronic switching circuits presents significant advantages. However some issues not apparent when using traditional non-digital control methods arise. Synchronised sampling and timer accuracy are typical areas that need attention. ELMG design and develop direct digital power electronic controllers base on microcontrollers microprocessors, DSP's and FPGA's. Digital control design techniques are used to ensure system stability and robustness.
ELMG's embedded software expertise coupled with experience and knowledge of algorithm design for power electronic control allows generating gate drive signals directly from microprocessor pins. With this approach and expertise you can be sure that the converter control is flexible and reliable while avoiding problems such as those due to timer resolution causing unwanted frequency components.
We design transformers and magnetic components for power converters. ELMG are able to design both high frequency and low frequency magnetic components in a wide variety of sizes and ratings. Key areas of design knowledge include lifetime estimation and wear out mechanism analysis for high frequency transformers and inductors. Expertise and experience includes the design of saturable inductors and saturable coupled inductors.
Power electronics converters generate significant amounts of heat in small volumes. ELMG design power converters with thermal design as a key consideration. All to often we have seen thermal design dismissed until late in the development. ELMG thermal design approach is to analyse, model and verify the converters thermal performance early.
We have expertise in the design and development of power electronic converters for controlling AC motors such as induction motors, synchronous motors, permanent magnet 3 phase motors, or brushless DC motors. ELMG also can design DC motors drives. The use of motor drives and starters in motion control systems including pumps, conveyors, extruders, winders and un-winders is an area where we have significant experience.
Power converters give great controllability at very low control cost. Ensuring that the converter is stable and will operate correctly by analysis and design is the ELMG approach. We have expertise in small signal analysis from first principals and also use more structured modeling techniques such as state space averaging. Extensive use is made of simulation using MATLAB. ELMG also have significant large signal modeling expertise and experience.
The control of power converters connected to other power converters presents a significant challenge, especially if the power converters control bandwidths are not comparable. ELMG expertise in analysis and design of interconnected power converter stability is extremely useful when multiple power converters are connected together.
Interfacing controlled power converters to the AC mains is becoming more common. Reversible rectifiers and active filters interact with the AC system and other power converters. ELMG expertise in interconnected converter design extends to mains connected power converters.
A critical factor that is often overlooked in the connection of any power converter to the mains is the control influence of the input EMC filter on the controller design. Effectively the filter limits the performance of power converter and has significant effect on the converter operational stability. ELMG have tools and experience in this type of problem.
ELMG has significant research and development experience with active filtering of harmonic currents. The active filter interaction with other power converters presents a converter interaction problem. ELMG expertise and techniques can solve the problems associated with these active filters.
Discover how ELMG power electronics design expertise can help in your next project.