Archive for the ‘Uncategorized’ Category

PSMA Software Firmware Reliability Improvement Report

Monday, December 2nd, 2019

Improvement of software reliability is a pressing issue in the digital control of power electronics. It is commonly reported by managers and executives in large power supply purchasing OEMs that most of the issues with power supplies are due to software problems.

Improving software quality for digital power

As part of an initiative by the Power Supply Manufacturers Association (PSMA) Reliability Committee, ELMG Digital Power provided research, examples and written material for the PSMA Software Firmware Reliability Improvement Report.

ELMG Digital Power is proud to be primary contributor to the PSMA Software / Firmware Reliability Improvement Report

Typical issues in digital power electronics

Typical issues in digital power electronics include

  • Limited modulator precision due to timer and clock speed
  • Numeric precision limits in digital filters
  • Excessive delays from limited processing power

Software quality improvement

As software quality is the result of following and implementing a repeatable process the report details how

  • Version control
  • Code standards
  • Defect tracking
  • Code reviews
  • Code inspections
  • Inspections before testing
  • Test specifications

are used to improve code quality.

How do you get the report?

Best way to get the report is to join the PSMA or you can purchase it.

Want to preview the report?

Improving Quality is the ELMG Way

We are all really proud to be part of the effort to create this report on improving the quality of software in power supplies. It fits really well with our aim to improve the performance, efficiency and quality of digital power electronics systems.

Contact us for software quality improvement

If you are interested in having us review your software code and development process contact us.

Xilinx Alliance Program Re-Certification

Thursday, July 4th, 2019

ELMG Digital Power and the Xilinx Alliance Program

ELMG Digital Power and the Xilinx Alliance Program is an ongoing, valuable and extremely valuable partnership.

When asked about this ELMG Digital Power CTO,  Dr. Laird said

“Maintaining ELMG Digital Power’s commitment to providing exceptional service and products is our key uniqueness. To this end we are pleased to continue in the Xilinx Alliance Program membership.  We see great things happening with Xilinx All Programmable FPGAs and Zynq SoCs, UltraScale devices and the Spartan7.

It is great to see the capability of the Vivado Suite continue to allow exceptionally fast, reliable and robust development flows.  We are really pleased to continue with ELMG Digital Power’s Xilinx Alliance Program commitment and are please to be part of the Xilinx community.”

ELMG Digital Power and the Xilinx Alliance Program

Certification for ELMG Digital Power CTO, Dr Hamish Laird

Dr Laird continues

“For me this training let’s me stay capable and able to create Xilinx based power electronics controllers. Xilinx products are great and the support and capability we can provide to customers is amazing.”

Contact ELMGDigitalPower now.

ELMG Digital Power and the Xilinx Alliance Program

Xilinx Alliance Member ELMG Digital Power

Choosing you power electronics processor effectively in Digital Power Electronics Development – Free Webinar

Thursday, May 16th, 2019

Tuesday June 4 at 12 noon PDT (3pm EDT)

How do you choose your processor.

Your Digital Power Electronics Processor Choice power electronics processor is crucial to success in Digital Power. And the key to choosing in a way that doesn’t end up creating delays in the project delivery.

So what are the most important issues to consider

Processing latency

Delays in the digital processor add phase lag and so can make getting stable operation at reasonable target bandwidth. Estimating accurately the delay that is acceptable and possible with possible target processors ensures that the processor will not run out of time during the development.

How to manage the limited number of bits

The limited number of bits in a processor means that there is a trade off between precision and dynamic range. The natural instinct is often to have larger dynamic range and lower precision. Best practice is to choose the opposite. Joins us in the webinar to see why.

Timer resolution

Likewise timer precision limits the available resolution in PWM and variable frequency modulators.

ELMG Digital Power are offering you the opportunity to attend our regular webinar on Digital Power Electronics. The next webinar is

Tuesday June 4 at 12 noon PDT (3pm EDT)

This is an hour webinar on that details the accumulated ELMG Digital Power experience with processor choices for power electronics control

Join ELMG Digital Power’s regular monthly Digital Power Webinar and expand your Digital Power knowledge and expertise. 

The webinar will be hosted and presented by Dr. Hamish Laird  ELMG Digital Power’s CTO  Hamish has 25 years experience the design and implementation of varied digital control systems and IP for power electronics.

This exciting opportunity is free and includes a 15 minute Q&A session with Dr. Hamish.

Dr Hamish Laird

The webinar is scheduled for

Tuesday June 4 at 12 noon PDT (3pm EDT)

Click the link below to sign up for the webinar

http://info.elmgdigitalpower.com/choosing-your-digital-power-processor

In-house course digital power electronics

Wednesday, May 30th, 2018

We recently ran our digital control course in-house for a power electronics company.

Great group of guys and this is what they said.

“Everybody enjoyed the course, and it’s given us a lot of food for thought!”

Why choose in-house course digital power electronics training?

  1. Keep know-how in-house.
  2. Minimal disruption to your team.
  3. Everyone gets the same exposure.
  4. It’s team building.
  5. In house means no travel and travel can be hard to get approved.
  6. Have the teacher all to yourself.
  7. Great value when you add it all up.
  8. Emphasis on material specifically for you.

When can we have it?

Send us an e-mail and we’ll work a time out.

Is it the same as the publicly available course?

Yes – we use

  • #Teledyne #Lecroy scopes
  • AP 300 analysers
  • Boost coverters
  • Fyfe digital power platforms

It’s run by the same team

We also do the same workshop practical experiments to reinforce the learning.

Can you tell us who had the recent in-house course?

No. It is covered by an NDA so we won’t disclose which company it was.

 

Equivalent bits – a question from LinkedIn Group

Wednesday, May 23rd, 2018

“I was looking through ELMG’s tutorial “Three Key Issues to Watch out for in the Digital Control of Power Electronics” (https://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

 

 

For your Digital Control Workshop which Micro Controllers are taught?

Wednesday, May 16th, 2018

For your Digital Control Workshop which microcontrollers are taught in the class?

Texas Instruments?

Thanks John

 

Hi John,

The uniqueness of the Digital Control Workshop is that it is not focused on one microcontroller family.  We cover the key know how that ensures you and your team will get your digital power supply robust and reliable.

Here at ELMG Digital Power our platform is an FPGA based power converter controller that we have developed.  We sell power electronic specific FPGA IP blocks for PWM, filters, three to two blocks and all the other required power electronic blocks.

We have development experience in using processors for power electronics control from

  • Xilinx
  • Atmel
  • Microchip
  • STM
  • AD and
  • Ti

Our course came about when and R and D manager asked us why his team had knowledge gaps that we were now helping fix.  These gaps were common across a number of our OEM clients.  We address these key common knowledge gaps in the course.

Happy to have a netmeeting or skype call to talk through this at anytime.

Contact us