Lunch & Learn (& Help)
Lunch & Learn is a popular concept of short trainings and seminars held during or around lunch breaks. In a bit informal way you learn about particular topics. It is one topic per session, served in a bite size format and optimized for participant’s digest.
Our Lunch & Learn program offers even one more benefit: all participants support a good thing. MB Drive Services donates ALL the income from Lunch & Learn sessions to Ukraine that still suffers under the insane Russian invasion.
What is Lunch & Learn about?
In each Lunch & Learn session we explain one subject associated with VFDs and variable speed drive systems. The duration of a session shall be similar like a lunch break, i.e. ranging between 30 and 45 minutes. At the end there is a room for questions. In small groups questions can be asked any time during the lesson.
Format of Lunch & Learn
Our lessons are provided virtually in form of zoom meetings. The presenter is typically sharing slides. The Q&A session is answered verbally. In case of large amount of questions the answers are distributed in written form within few days after the live lesson.
For on-site trainings please approach us and we will try to make a customized offer for you.
Our values
We deliver lessons that are logically structured, easy to follow and illustrated with suitable examples. Each lesson is always a well-balanced mix of theory and practical experience.
Our lessons are based on years of experience in technical trainings.
Cost
Cost of a lesson is CHF 10 / EUR 10 / USD 11 per participant. Payments via bank transfer or by using PayPal.
We also offer Lunch & Learn for companies (to be agreed upon individually).
Topics
1. Temperature rise test of converter transformers
Our first topic focuses on temperature rise test of converter (rectifier duty) transformers. You will learn the applicable standards and definitions, the test connection, measurement points, test criteria, determination of temperature rise and gradient, dealing with harmonics etc. Step by step, illustrated with examples. The lesson covers general items as well as specific points related to converter transformers.
Goal: After this lesson you will understand the temperature rise test and will be able to read a test report or follow the test when witnessing it as a client at FAT.
2. Requirements on converter transformers
In a compact format you explore the key requirements on converter transformers that are additional to those used in power transformers. All you need to know to correctly specify a transformer supplying your VFD.
Goal: Learn about specific issues related to converter (rectifier duty) applications such as presence of harmonics, non-sinusoidal voltage waveform, EMC, protection concept and much more.
3. Winding connections and vector groups
Do you finally want to understand the designation of multi-winding transformers and their phase shifting? Then this course is exactly for you. After finishing it you will be able to read and understand even the most complex winding connections of converter transformers. What is a clock number? How to apply clock numbering to multi-winding transformer designs? The explanation is illustrated by number of examples.
Goal: Understand and correctly interpret the winding connections used in multi-winding transformers. Know the alternative ways of designation. Be able to express any phase displacement.
4. Variable speed drive technologies
In this session we will talk about the solutions to achieve a variable speed of the driven machine. The technologies include variable frequency drives (VFD), hydrodynamic (fluid) couplings, gas and steam turbines and dc motor drives. Let’s compare their possibilities in terms of output power range, power density, availability, maintenance, dynamic performance etc? What are the pros and cons of each technology? And how does the outlook look like?
Goal: This lesson gives you a brief overview of the variable speed technologies. You will know the competitive solutions and understand their advantages and drawbacks. The comparison (kind of SWOT) is aimed to be fair and transparent.
5. Excitation types for synchronous machines
We currently prepare a brand new lesson summarizing the excitation systems of synchronous machines. You will get to know the most common solutions. What is the key difference between brushless and slipring type of excitation? Which of them are suitable for variable speed motor drives? What to pay attention to when retrofitting an existing synchronous machine for variable speed operation?
Goal: Get an overview of most common excitation systems of synchronous machines. Understand the advantages and limitations of the solutions, particularly brushless versus slipring type. Know which schemes are suitable for variable speed synchronous motor drives. What to consider when retrofitting an existing synchronous machine.
6. Harmonics in a nutshell
This session brings practical information about harmonics and grid distortion. All relevant information in a nutshell.
Goal: You will learn how the harmonics are generated, how a typical harmonic spectrum looks like, what are the methods to reduce harmonic distortion, what data you need for a network study or how to proceed with a design of grid filter.
How to apply
Interested to participate? Perfect, we look forward to welcome you in one of our lessons. Apply using the below form. Talk to you soon!
Interested in other courses and trainings? Check for example our KYDS program:
