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Q. Explain about Direct-current machines?
Generally speaking, conventional dc generators are becoming obsolete and increasingly often are being replaced by solid-state rectifiers in most applications for which an ac supply is available. The same is not true for dc motors. The torque-speed characteristics of dc motors are what makes them extremely valuable in many industrial applications. The significant features of the dc drives include adjustable motor speed over wide ranges, constant mechanical power output or torque, rapid acceleration or deceleration, and responsiveness to feedback signals.
The dc commutator machines are built in a wide range of sizes, from small control devices with a 1-W power rating up to the enormous motors of 10,000 hp or more used in rolling-mill applications. The dcmachines today are principally applied as industrial drivemotors, particularly when high degrees of flexibility in controlling speed and torque are required. Such motors are used in steel and aluminumrollingmills, tractionmotors, overhead cranes, forklift trucks, electric trains, and golf carts.Commutatormachines are also used in portable tools supplied frombatteries, in automobiles as starter motors, in blower motors, and in control applications as actuators and speed-sensing or position-sensing devices.
Q. Show the procedure of Hex to Decimal Conversion? To convert from the Hex to the Decimal, multiply the value in each position by its hex weight and add each value. Using the
On state voltage drop It is the maximum instantaneous on state voltage measured under pulse conditions to avoid excessive dissipation at a particular junction tem
how does a zener diode works.
Metallic Bonding In metals, the outer shell is filled through no more than three electrons (loosely bound and given up easily) => great chemical activity and very high elec
what is the method to do this project and what material used for?
Overall Performance Indicator Method Overall Performance Indicator could be derived from a combination of few of the specific core indicators. The way this combination is comm
determine & sketch convolution y(n) of signal X(n)=an , -3 0 , elsewhere H(n)=1 , 0 0 , elsewhere
Q. What do you mean by Mantissa? The mantissa , as well known as the significand , represents the precision bits of the number. It is composed of an implied leading bit and t
Transistor A transistor is a semiconductor device that is employed to amplify and switch electronic signals. It is made up of a solid piece of semiconductor material, with min
1. The circuit below will be most efficiently analyzed by obtaining the Thevenin equivalent circuit for the circuit to the left of the points (a-b) on the schematic. The capacitor
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