DRIVES AND CONTROLS 



227 



5—1 



AC. 

 supply 



I 



o 

 o 

 o 

 o 



RecHfier-^ 



E= Voltage 

 av= Average 

 R.M.5= /?ooj' mean square 



Load 



Eav = 0.450 E RMS 



CA) 



►|4' 



'iRecti'fiers 



-l 



-RMJ 



Load 



= 0.450 Ek 



fB) 



/\ A /\ / 

 \j \J \j \J 



Eav=0.9ERMS 



Fig. 454. — Single-phase rectifier circuits generally used. {A) Half- 

 wave rectifier circuit used in radio, also in industrial equipment such as 

 vibrating machinery or electric razors, requiring reciprocating motion. (B) 

 Full-wave rectifier circuit used in radio work and magnetic chucks. (C) 

 Full-wave rectifier circuit used in industrial applications to obtain direct- 

 current from alternating-current source. 



Load 



Load 



Fig. 455. — Other rectifier circuits. {A) Single-phase voltage-doubler rectifier 

 circuit used in radio work to obtain higher than line voltage without transformer. 

 (B) A three-phase full-wave rectifier circuit, one type of rectifier used to obtain 

 a large amount of direct-current power for power circuit. 



