Updated
Photo from the course title page Motor drives: Graph showing measurement of current and voltage supplying the frequency converter.

Electrical installations:

Motor Drives

35 minutes

Requirements:

  • Background in electrical installations

Danish

Included in membership

DKK 745 ex VAT

Topics:

  • Basic function

  • Construction

  • 1 and 3 phase grid connection

  • Power draw from the power grid

  • Harmonic current from motor drives

  • leakage current and motor cable

Course motor drives

The course has been significantly updated in June 2025. The motor drive course has been divided into a basic part, one for troubleshooting, and one for grid connection requirements. The courses have been expanded to be more in-depth, with an emphasis on clear explanations and animations.

The motor drive and the conditions surrounding it are described to achieve an understanding of the necessary electrical technical conditions for correct operation and to avoid emitting unwanted noise. The basic structure is examined, providing a background for troubleshooting the installation, for example. This includes looking at single-phase and three-phase motor drives, as well as two-pulse and six-pulse couplings.

PWM (Pulse Width Modulation) and leakage current issues from frequency converters, including motor cables, are briefly highlighted.

Biggest source of errors in Industrial Installation

Noise, imbalance and DC on the grid

Rohde Consulting's experience from troubleshooting industrial plants is that frequency converters are the most frequent source of errors. It could be a faulty inverter, too high grid impedance (too low Ik,min) or incorrect installation technique. Typically, the current draw to the motor controller is looked at using different load levels. Take the motor drive course and the harmonic currents course is also recommended.

Get hands-on help from an engineer

Rohde Consulting is happy to send out an engineer to solve the challenges together and gain more knowledge and experience for your future work. TSE-learning and Rohde Consulting's goal is to expand knowledge and understanding at your company.

Power quality course

Rohde Consulting offers a physical 3-day course in power quality with practical exercises. Here you can gain a better understanding of power quality and exchange insights.

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