20 October 2018

Compare Inverter AC and Non - Inverter AC

  • The inverter 1 Ton AC will run continuously but draws as much power that is required to keep the room at desired cooling level. The Non inverter 1 Ton AC will always run at peak power requirement when the compressor is ON.
  • The inverter AC works on variable speed compressor which means that its speed decreases when the temperature of room is right or lower and speed up when the

Types of Conductor

 Solid conductors

  • The cross – section of the solid conductors are small because it is very difficult to handle it due to higher weight. It may break at the some point due to wind pressure in long span. ( Span is defined as the distance between two towers ).

Stranded conductors

29 September 2018

Torque in the Synchronous Motor

Starting torque

  • It is torque developed by the synchronous motor when name plate voltage is applied to its armature winding. It is also called as breakdown torque. 
  • It may as low as 10% in the case of centrifugal pump.

4 April 2018

Brake Test

  • It is direct test useful to find efficiency of small DC Motor.

Theory

  • The output power of the DC Motor is measured by applying brake to a pulley.
  • One rope is wound round the pulley and its two ends are attached to spring balances W1 and W2

3 April 2018

Compare : Static RAM and Dynamic RAM

Static RAM

  • It can store data as long as the supply is kept on.
  • It consists of flip flop as a memory cells.
  • It is available in both bipolar and MOS technology.
  • It is used where speed is prime consideration

2 April 2018

Reluctance Motor : Construction, Working, Advantages, Disadvantages and Applications

Single Phase unexcited Synchronous Motor

  • The characteristic of single phase unexcited synchronous motor in which excitation does not necessary is given below.
        ( 1 ) It operates on single phase supply. 
        ( 2 ) The stator rotating magnetic field rotates at synchronous speed. 
        ( 3 ) It does not require DC Excitation. 

1 April 2018

Hysteresis Motor : Construction, Working, Advantages, Disadvantages, Characteristics and Applications

Single Phase unexcited Synchronous Motor

  • The characteristic of single phase unexcited synchronous motor in which excitation does not necessary is given below.
       ( 1 ) It operates on single phase supply. 
       ( 2 ) The stator rotating magnetic field rotates at synchronous speed