Application of synchronous motors

Application of synchronous motors

     1. They are used in power houses and substations in parallel to the bus-bars to improve the power            factor.

     2. Synchronous motors are also used to regulate the voltage at the end of transmission lines.

     3. In factories having a large number of induction motors, or other power apparatus operating at              lagging power, they are employed to improve the power factor.

     4. Typical applications of high speed synchronous motors are such drives as fans, blowers, dc                   generators, lines shafts, centrifugal pumps and compressors, reciprocating pumps and constant              speed frequency changers, rubber and paper mills etc.

What is synchronous motor

What is synchronous motor

     

     1. The synchronous motor is one type of 3 phase A.C motor which operate at a constant speed                 from no load to full load.

    2. It is similar in construction to 3-phase A.C generator in that it has a revolving field which must           be separately excited from a D.C source.

     3. By changing the D.C field excitation,the power factor of this type of motor can be varied over a          wide range of lagging and leading values.

     4. This motor is used in many application because of its fixed speed from no load to full load, its             high efficiency and low initial cost.

     5. It is also used to improve the power factor of 3 phase AC industrial circuits.