Bench Marking of Alternate Soft-charging Circuits for Variable-frequency Drives

Functional Safety for Integrated Circuits Used in Variable Speed Drives

Requirement 1—To use reliable components. This means ICs with a sufficiently low FIT rate. FIT rates are often calculated according to standards such as IEC 62380 or SN 29500, which base their results on the average failure rate seen in the field for various types of components. Alternatively, data can be based on accelerated life testing such as that found at analog.com/ReliabilityData. One im...

Control of Crushing Circuits with Variable Speed Drives

Crushers play an important role in the comminution of minerals and the control of its operation can lead to an increase of the plant throughput and efficiency. This work presents a simple but effective method for controlling a crusher circuit by acting over the feeder and the speed of the conveyor belt carrying out the mineral up to the crusher. Guidelines for tuning the strategy, as well as pr...

A review & analysis of harmonics in Variable Frequency Drives (VFDs)

In this manuscript, the author has tried to analyze a study of Variable Frequency Drives. Variable frequency drives are energy saving drives. But they generate harmonics generates. Harmonics introduced by any means affect the performance parameters of any system The presence of harmonics is the system for a long duration & that, too, of higher order affect the various parameters in a Power dist...

Alternate-Marking Method for Passive and Hybrid Performance Monitoring

A Test Bench for Differential Circuits

Last updated on September 12, 2006. You can find the most recent version at www.designersguide.org. Contact the author via e-mail at [email protected]. Permission to make copies, either paper or electronic, of this work for personal or classroom use is granted without fee provided that the copies are not made or distributed for profit or commercial advantage and that the copies are comple...