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Motor and machine
Since its invention fare more than a decade ago, the three-phase motor has increasingly established itself as drive unit. Today, it represents the most frequently employed electric drive.

Frequency inverters – energy recovery offers additional improvement in efficiency with reduced space requirements and costs
Today, the potentials to increase energy efficiency in the industry and especially in electrical drives technology are well-known to a large circle of users, but there is still a much to be done in practice.

About the hidden costs of frequency inverters
Frequency inverters are becoming increasingly important in automation engineering. Many automation tasks that were realised in the past with EC and DC motors as well as a wide range of servo motors are being taken over more and more by three-phase standard motors and frequency inverters. This configuration significantly reduces the costs of the drive components in comparison with servo drives. However, the financial gain seems to obscure possible further cost reductions on drives with frequency inverters.

Why power electronics for fan drives

Fans and blowers are used for the widest range of applications when moving and blowing air. In addition to pure ventilation, important applications also include the cooling of equipment and systems and the climate control both of technical or biological systems as well as warehouses, residential and recreational areas.

State-of-the-art electronic devices for the wear-free braking of three-phase induction motors
(Dr. John P. Gibson, Dr. Frank O. Hake)

Electronic braking devices allow three-phase induction motors to be braked wearfree and offer a rugged alternative to mechanical brakes, especially for high moments of inertia- or high switching frequencies. Application examples from the field will describe state-of-the-art technology as well as new developments in this area.