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Brushless DC Motor

Brushless DC Motor: The term Brushless DC Motor is applied to many configurations of ac synchronous motors in which semiconductor control is used to control stator currents such that maximum…

Equivalent Circuit of Synchronous Motor

Equivalent Circuit of Synchronous Motor: By assuming linearity of the magnetic circuit, it is possible to obtain simple Equivalent Circuit of Synchronous Motor. The validity of this assumption stems from…

Generating Mode and Motoring Mode of Synchronous Machine

Generating Mode and Motoring Mode of Synchronous Machine: Generating Mode and Motoring Mode of Synchronous Machine is derived by a realistic synchronous machine will have resistance ra and leakage reactance…

DC Machine Applications

DC Machine Applications: Whenever the application of any machine is considered, its operating characteristics along with its economic and technical viability as compared to its competitors are the essential criteria.…

Testing of DC Machine or Swinburne Test

Testing of DC Machine or Swinburne Test: Testing of DC Machine or Swinburne Test - Machine efficiency, in general, has been discussed already. The approach here will be to apply…

Braking of DC Motors

Braking of DC Motors: Controlled slowing or stopping of a motor and its driven load is as important as starting in many applications (e.g. cranes, traction on a slope to…

Series Parallel Control of DC Motor

Series Parallel Control of DC Motor: Series Parallel Control of DC Motor - Here two identical motors are coupled together mechanically to a common load. Two speeds at constant torque…

Starting of DC Motors

Starting of DC Motors: At the time of Starting of DC Motors (n = 0), the induced emf of a motor is zero such that the current drawn from rated…