DC Motor Drives

DC Motor Drives:

Armature Voltage Control using Transformer : Variable voltage for the dc motor control can also be obtained by either using an auto-transformer or a Armature …


Chopper Control of Separately Excited DC Motor : Motoring Control : A transistor Chopper Control of Separately Excited DC Motor drive is shown in Fig. …


Chopper Control of Series Motor : Motoring : Chopper Control of Series Motor and va and ia waveforms will be same as shown in Fig. 5.41. Va …


Closed Loop Speed Control of DC Motor : Closed Loop Speed Control of DC Motor – The converters (rectifiers and choppers) are built using semiconductor …


Controlled Rectifier Fed DC Drives : Controlled Rectifier Fed DC Drives are used to get variable dc voltage from an ac source of fixed voltage. …


DC Motor Braking Methods : The need for electric braking was explained earlier, the motor works as a generator developing a negative torque which opposes …


DC Motor Reversing Switch Diagram : DC Motor Reversing Switch Diagram is shown in Fig. 5.34(a). A fully-controlled rectifier feeds the motor through a reversing …


DC Shunt Motor Starter Design : Maximum current that a DC Shunt Motor Starter Design can safely carry during starting is limited by the maximum …


Drawbacks of Rectifier Fed DC Drives : Drawbacks of Rectifier Fed DC Drives are as follows: 1. Distortion of Supply: Source current of a rectifier has harmonics. …


Dual Converter Control of DC Separately Excited Motor : A Dual Converter Control of DC Separately Excited Motor (Fig. 5.35) consists of two fully-controlled rectifiers …


Four Quadrant Drive With Field Reversal : Four Quadrant Drive With Field Reversal as shown in Fig. 5.36, armature is fed from a fully-controlled rectifier …


Rectifier Control of DC Series Motor : Single-phase controlled Rectifier Control of DC Series Motor are employed in traction. A single-phase half-controlled Rectifier Control of …


Single Phase Fully Controlled Rectifier Control of DC Motor : The Single Phase Fully Controlled Rectifier Control of DC Motor is shown in Fig. 5.26(a). …


Single Phase Half Controlled Rectifier Control : Single Phase Half Controlled Rectifier Control is shown in Fig. 5.29(a). In a cycle …


Speed Control of DC Motor Drives : The Speed Control of DC Motor Drives can be any of the following methods: Armature voltage control Field flux control Armature …


Three phase Fully Controlled Rectifier Control : Three phase Fully Controlled Rectifier Control of DC Separately Excited Motor: Three phase Fully Controlled Rectifier Control (6 pulse) fed separately excited dc motor …


Transient Analysis of DC Motor : Starting, braking, reversing speed changing and load changing are the Transient Analysis of DC Motor which commonly occur in …


Types of DC Motor : The commonly used Types of DC Motor are shown in Fig. 5.1. In a separately excited motor, the field and …


Ward Leonard Method of Speed Control : Known after the name of its inventor Ward Leonard Method of Speed Control (1891), it consists of a …