Line commutated converters

Line commutated converters,types,single phase,three phase

1. Line Commutated Converters or Rectifier Circuits Converters which work on the principle of natural commutation are called line-commutated converters

2. Classification Uncontrolled rectifiers Controlled rectifiers or full controlled rectifiers Semi-controlled rectifiers or half controlled rectifiers

3. Half wave controlled rectifier with resistive load

4. O/p load Voltage:

5. Half wave controlled rectifier with Inductive load

6. Effective value of load with free wheeling diode is:

7. Full Wave Control circuit Two SCR’s or a Triac are used for full-wave AC Symmetrical triggering is used in each half-cycle. Two basic configurations for full wave circuits: Mid-point configuration :-require center tap transformer. Bridge circuit : requires no input transformer.

8. Mid-point configuration M-2 connection:-means single phase full wave circuit with two SCR’s. k/as two pulse converters. M-6 connection:- is a three phase full wave circuit with 6 SCR’s. k/as six pulse converters. Bridge circuit configuration B-2 connection: Single phase B-6 connection: Three Phase

9. DC output voltage without freewheeling diode

10. DC o/p voltage with free wheeling diode

11. DC o/p voltage with free wheeling diode

12. 3 Phase full wave controlled bridge rectifier