| 摘要 |
1342110 Automatic current control H K SCHOLL 23 April 1971 11116/71 Heading G3R [Also in Divisions G1 and G4] The discharge current of a battery (22) Fig. 6 (not shown) is maintained constant by a servosystem which includes a motor (57) for adjusting a rheostat (41) in the discharge current path. Signals respectively proportional to the desired and actual currents are compared in a differential amplifier 113, and if their difference is too great one or other of two Zener diodes 117, 118 breaks down to energise a corresponding relay R5 or R6 which in turn supplies power to the motor to drive it in the appropriate direction. The presence of the Zener diodes prevents hunting, and a storage capacitor 119 across the differential amplifier output provides damping. |
