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Three Phase Drives

Three Phase Drives: Single phase drives discussed in the previous section are employed for low and medium powers. When the power of the drive is very large the three-phase converter…

Commutation in DC Motor

Commutation in DC Motor: Commutation and commutator wear and tear of the dc motor must be given due consideration when the motor operates on solid state converters. Spark-less commutation must…

Starting Methods of Synchronous Motor for LCI

Starting Methods of Synchronous Motor for LCI: It has been pointed out that a Starting Methods of Synchronous Motor for LCI, even though complicated in its construction, has an advantage…

Current Source Inverter with Forced Commutation

Current Source Inverter with Forced Commutation: Current Source Inverter with Forced Commutation - As has already been discussed, the disadvantages of machine commutation are (a) limitation on the speed range…

Current Source Inverter Fed Synchronous Motor Drive

Current Source Inverter Fed Synchronous Motor Drive: A synchronous motor draws a stator current which is independent of stator frequency when V/f and E/f are maintained constant and armature resistance…

Synchronous Speed on Variable Frequency Supply

Synchronous Speed on Variable Frequency Supply: As has already been discussed, the speed of a synchronous motor can be varied by supply frequency variation similar to an induction motor. The…

Field Oriented Control of Induction Motor

Field Oriented Control of Induction Motor: In the slip controlled drives using VSI or CSI discussed in the foregoing sections, the stator voltage or stator current is controlled using slip…

Power System Protection and Switchgear Articles

Power System Protection and Switchgear Articles: This Power System Protection and Switchgear Articles which includes the following topics: Basic Ideas of Protection Relay Fault Meaning Zone Protection Essential Qualities of…