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most common medium voltage VFD topologies in comparison
Uncategorized

On-demand webinars: Final sale

On-demand webinars: Final sale (last 24 hours) MB Drive Services is providing webinars on drive related topics since more than 3 years. Initially, those webinars were live through zoom. Since May 2024 we have been using the WebinarJam platform to Read more…

By admin, 2 weeksMay 18, 2025 ago
multi-motor drives
VFD multidrives

Multi-motor drives and their coupling

Multi-motor drives and their coupling Multi-motor drives in this context represent applications where multiple motors work together to drive specific load system. Unlike individual drives, there is certain coupling between the motors. Hard and soft coupling The motors can be Read more…

By admin, 2 weeksMay 12, 2025 ago
closed-loop electromechanical interaction
Torsional

Why torsional vibration in variable speed drive systems deserves an attention?

Why torsional vibration in variable speed drive systems deserves an attention? Introduction I am an electrical engineer, same as probably most of the readers of our blog. The electro-mechanical interaction within the drive system is therefore not so easy to Read more…

By admin, 4 weeksApril 30, 2025 ago
neutral point treatment of a converter transformer
VFD transformers

Neutral point treatment of a converter transformer

Neutral point treatment of a converter transformer A common question of system integrators or end users is about the neutral point treatment of a converter transformer. Can or shall the neutral point be earthed? What are the consequences for the Read more…

By admin, 2 monthsMarch 26, 2025 ago
VFD protection reaction
Protection in drive systems

VFD protection reaction

VFD protection reaction Reliable protection is key for long term successful operation of a variable frequency drive (VFD). There is a wide range of situations outside of the normal operation to what the drive system shall respond. In this blog Read more…

By admin, 3 monthsMarch 5, 2025 ago
VFD soft starters - Methods of synchronous transfer
VFD basics

VFD soft starters – Methods of synchronous transfer

VFD Soft Starters – Methods of Synchronous Transfer Abstract Purpose of a VFD soft starter is to start and accelerate the motor up to the nominal speed. The final step is to synchronize the machine with the grid and transfer Read more…

By admin, 4 monthsJanuary 16, 2025 ago
most common medium voltage VFD topologies in comparison
VFD basics

Most common medium voltage VFD topologies in comparison

Most common medium voltage VFD topologies in comparison Abstract Medium voltage drives consist of several topologies. While some of them are seldom found in industrial applications, others are very popular and create integral part of the portfolio of most global Read more…

By admin, 5 monthsJanuary 4, 2025 ago
Transformer impedance
VFD transformers

What is the definition of short-circuit impedance?

What is the definition of short-circuit impedance? Short-circuit impedance, also called impedance voltage, is an important design parameter of a transformer [1]. Thus, it is crucial to understand this parameter. In this brief post we introduce three ways of definition Read more…

By admin, 6 monthsDecember 7, 2024 ago
Black Friday Sale
Uncategorized

Black Friday Sale

Black Friday Sale MB Drive Services participate in the biggest savings event of the year! The traditional Black Friday sale is combined with a 6 years anniversary of our first blog post that started the whole journey. This Black Friday, Read more…

By admin, 6 monthsNovember 28, 2024 ago
sources of motor acoustic noise
Motor basics

Considerations about motor noise level

Considerations about motor noise level This post provides few considerations about motor noise level with respect to inverter supply. Noise might be considered as one performance criteria of the motor. Noise level of electric equipment is regulated by standards and Read more…

By admin, 6 monthsNovember 25, 2024 ago

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