1 ( )( 2014 2015 ) A B A B 50232428 ( C ) A R3 B R1 C R2 D R1 R2 R3 U A B A R1 U I R3 I3 A IA I I3 UA A B R2 U I R3 I3 A IA I I3 A B UB U IA(RA R1) B C R2 B D 2 ( )( 2015 2016 ) 10A 58A 12.5V 50232429 ( B ) A 35.8W B 43.2W C 48.2W D 76.8W E I1(R r) R E I1r I1 12.5 10 P1 I 2 1R 120W U2 E I2r 12.5 9.6V P2 U 2 2 R 9.6 2 1.2 76.8W P P1 P2 120 76.8 43.2W B 3 ( )( 2015 2016 ) ( ) U C 50232430 ( D ) A U C C U B U C C U C U C C U D U C C U U C 1 R kC U IR E R r R R ER R r 1 kC U C U C D D