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- 200W PFC of Only 1mm Thickness (May 10, 2010)
Soft switching employs parasitic inductances and capacitors to reduce switching losses.
Ideally, you get a huge benefit with intelligent control without the need to add components.
Why not using the internal output capacity of a power MOSFET for elimination of switching losses? ...
- Loss of One Phase of a Three-Phase Rectifier (March 22, 2010)
What happens if one phase of a three-phase rectifier is lost? Will the rectifier keep working in single-phase mode
with sinusoidal phase current? Of course it depends on the converter topology and the control.
Researcher from the Power Electronic Systems Lab., ETH Zurich, worked on such a feature and the control some time ago,
and implemented this in the three-phase AC/DC Vienna Rectifier ....
- What Simulation Speed Do We Need in Power Electronics? (Feb. 23, 2010)
When we built the first prototype of a 10kW Three-Phase AC/DC Vienna Rectifier in 1994,
we started with circuit simulations to make sure the new topology would really work.
We used PSpice, and simulating one mains period of 20ms took more than 12 hours ...
- 3kW Single Phase PFC with 99.2% Efficiency (Jan. 15, 2010)
... But now the idea was to maximize efficiency, and the research group around
J. W. Kolar and J. Biela realized a single-phase PFC prototype with 99.2% efficiency
(measured via calorimeter). Details of this optimization will soon be published ...
- Simulating a 5kW Aircraft Power System (Nov. 20, 2009)
... The rectifier in this example is an interesting topology for aircraft power systems with
typical input voltage [98V ... 132V] and a mains frequency [400Hz ... 800Hz]. It's an
amazing converter with no active switches (no control electronics) but approximately
sinusoidal input currents. ...
- Text and Comments in the Worksheet (Oct. 29, 2009)
One missing feature is now available in GeckoCIRCUITS: It is the ability to write text
comments directly into the worksheet. Have a look at the GeckoCIRCUITS online version ...
- Sunday morning meeting in the laboratory (Sept. 8, 2009)
... Now we have implemented blocks to make motor control task easy in GeckoCIRCUITS. Check out the
latest example below (we set the new PMSM-example as default). Prof. Nishida employs GeckoCIRCUITS now ...
- Debugging a Complex Converter Topology (Aug. 26, 2009)
With converter models of high complexity it is always very important to be able to reliably check where
all connections are and if components are really connected. ...
- How to simulate non-linear inductors (Aug. 10, 2009)
In two recent PhD projects at the Power Electronic Systems Lab., ETH Zurich, it became
necessary to model non-linear capacitors and inductors. We spent the last week to
implement such non-linear models into GeckoCIRCUITS ...
- How do you teach power electronics? (July 31, 2009)
Maybe you have to teach colleagues or customers how power electronics works, maybe you
supervise students or make your money as electronics consultant. Or you need to remember
how a certain topology works. Based on our own experience we developed years ago the free
online-course iPES ...
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