Transistor Voltmeter (TVM): Transistor Voltmeter - Direct coupled amplifiers are economical and hence used widely in general purpose low priced VTVM' s. Figure 4.9 gives a simplified schematic diagram of…
Electrodynamometer Instrument: Electrodynamometer Instrument - The D'Arsonval movement responds to the average or dc value of the current flowing through the coil. If ac current is sought to be measured,…
Working Principle of D Arsonval Galvanometer: The action of the most commonly dc meter is based on the fundamental princiÂple of the motor. The motor action is produced by the…
Different Types of Ammeters and Voltmeters: The following are the different types of ammeters and voltmeters in measuring instruments are PMMC Moving Iron Electrodynamometer Hot wire Thermocouple Induction type Electrostatic…
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…
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.…
Separately Excited DC Motor for Dynamic Analysis: Separately Excited DC Motor for Dynamic Analysis - The DC machines are quite versatile and are capable of giving a variety of V-A…
Ward Leonard Method of Speed Control of DC Motor: Ward Leonard Method of Speed Control of DC Motor is combined armature and field control and is therefore, operationally the most…