ROTARY CONVERTERS !>7 



current generator on the I:IM> oi' tin- same armature copper lo><. 

 (b) Calculate the relative outputs when the rotary is operating 

 at 0.7 power factor, (c) Calculate the relative outputs when 

 operating as a rotary converter and as a synchronous generator 

 at unit power factor on the basis of the same armature copper 

 loss, (d) Calculate the relative outputs when both are operat- 

 ing at 0.7 power factor. 



33. In a three-phase rotary converter assume that the cur- 

 rents on the direct- and alternating-current sides are respectively 

 steady and sinusoidal, and neglect all of the losses in calculating 

 their relative values, (a) Calculate the relative outputs when 

 operating as a rotary converter at unit power factor and as a 

 direct-current generator on the basis of the same armature 

 copper loss, (b) Calculate the relative outputs when the 

 rotary is operating at 0.7 power factor, (c) Calculate the rela- 

 tive outputs when operating as a rotary converter and as a syn- 

 chronous generator at unit power factor on the basis of the 

 same armature copper loss, (d) Calculate the relative outputs 

 when both are operating at 0.7 power factor. 



34. In a six-phase rotary converter assume that the currents 

 on the direct- and alternating-current sides are respectively 

 steady and sinusoidal, and neglect all of the losses in calculating 

 their relative values, (a) Calculate the relative outputs when 

 operating as a rotary converter at unit power factor and as a 

 direct-current generator on the basis of the same armature copper 

 loss, (b) Calculate the relative outputs when the rotary i- 

 operating at 0.7 power factor, (c) Calculate the relative out- 

 puts when operating as a rotary converter and as a synchronous 

 generator at unit power factor on the basis of the same armature 

 copper 1- Calculate the relative outputs when both are 

 operating at 0.7 power factor. 



36. In a twelve-phase rotary converter assume that the 

 currents on the direct- and alternating-current sides an- respec- 

 tively steady and sinusoidal and neglect all of the losses in cal- 

 culating their relative values, (a) Calculate the relative out- 

 puts when operating as a rotary converter at unit power 

 and as a direct-current generator on the I >a-i- ..t' the -ame armature 

 copper In Calculate the relative outputs when the rotan 



is operating at 0.7 power factor, (c) Calculate the relative out- 

 put- when operating as a rotary converter and as a synchronous 

 generator at unit power factor on the basis of the same armature 



