As part of their commitment to the Xilinx Alliance Program Certification ELMG Digital Power CTO and founder, Dr. Hamish Laird has completed Xilinx Certification.
When asked about this Dr Laird said
“As part of ELMG Digital Power’s continuing commitment to Xilinx, the Xilinx Alliance Program and the fantastic technology that Xilinx provides I am excited to complete this training and achieve Certification. We see great things happening with Xilinx All Programmable FPGAs and Zynq SoCs. It was great to see the capability of the UltraScale technology and to see the progress and extension of the Vivado Suite. We are really pleased to continue our Xilinx Alliance Program commitment and are please to be part of the Xilinx community.”
Dr Laird continues
“We are very pleased and proud of our Xilinx Alliance Program membership and for the value that it lets us bring to our customers. Training for key people in our organization is essential for us to continue to help our customers with FPGA and other All Programmable solutions. Our IP blocks, power electronics know how and ability to deliver solutions are our key areas of focus.”
“I was looking through ELMG’s tutorial “Three Key Issues to Watch out for in the Digital Control of Power Electronics” (http://www.elmgdigitalpower.com/power-electronics-digital-control-free-report-on-three-key-issues/) and am having some trouble understanding the relationship between frequency, register size, and equivalent bits.
An example given in the “2. Timer Precision” section of the document reads:
‘Consider the case where the timer clock runs at 40MHz. If the variable period oscillator register has 256 bits then the maximum frequency that the VPO can make is 10MHz and the minimum is 39.0625kHz. The example LLC resonant power converter needs a variable frequency of 500kHz to 210kHz to perform the control. This means the VPO count register has a usable range from 80 to 191. This is 111 counts which is 6.8 equivalent bits or almost seven bits.”
Equivalent bits are a great way to look at numeric precision.
Come join the discussion to see how equivalent bits is calculated. https://www.linkedin.com/groups/6677852/6677852-6242781250545942530
I’ve got a situation where I have a generator hooked up to a rectifier doing space vector control. The rectifier has an LC filter. Inductor current and cap voltage is measured. The L from the generator makes up the second L. I didn’t put a virtual damper in the fpga code (like I should have) and am trying different things. This is only a prototype so just working is the main thing. Which would be the best way to go in my current situation?
*pole cancellation in the digital controller (in dq and 0 components)
*Adding a physical damping resistor to the filter cap
*increasing filter cap
*removing filter cap (voltage Pll seems to track fine on HIL and simulation but haven’t tried on power hardware)
Sorry about posting too much, but I’m thankful for any suggestions!
ELMG Digital Power invites you to register for our tailored training course, ‘Introduction to the Digital Control of Power Electronics’ to be held in Camarillo, California on January 30th – February 2nd 2017.
ELMG Digital Power INC – Empowering you to achieve the Digital Control advantage
This hands-on course aims to provide engineers with solutions to the key issues in digital signal processing, using microcontrollers, microprocessors, DSP and FPGA. These solutions can then be employed effectively in the control of power electronics.
Over the four-day course, split into morning and afternoon sessions, participants will be provided with targeted training on digital power electronics control covering the detail of both digital control and power electronics and how they go together. They will gain the ability to close a digital power converter feedback loop in a stable fashion by following repeatable easily understood steps, as well as techniques to understand what the effect digital control’s limited bandwidth, processing power, number of bits and dynamic range have in digital power electronic control.
Engineers who attend the course will gain in-depth knowledge of the interaction of power electronics and digital control; this includes sampling and aliasing in the context of fixed and variable frequency switching power converters. There will be take away methods and steps to solve design issues such as one sample noise, precision limits in filters and controllers, non-linearity, quantization and other digital effects. A copy of the slide slide presentation course booklet covering the material presented and lunch each day will be provided.
The course has been specifically designed to meet the learning needs of engineers, regardless of whether you are:
The course will be presented and led by Dr. Hamish Laird, Principal Engineer at ELMG Digital Power. An extremely well-regarded teacher, engineer, researcher and public speaker, Hamish works in developing digitally controlled power converters and controllers for converters. He is the author of seventeen academic papers on digital power electronics and power quality and has taught previous digital power courses at Camarillo.
We run a Digital Power LinkedIn group where ideas about Digital Power Electronics Control are discussed.
The link to the group is https://www.linkedin.com/groups/6677852
The group now has more than 1500 members.
Come and join the discussions.
Latest discussion include Digital Power Electronics in Spain and available training course.