Abstract
In a single core magnetic amplifier proposed by Darling, it has been found that the voltage drop of the pair diode plays an important role in order to increase the amplifier gain and the DC load power. Therefore, it is anticipated that the design method for the circuit will become complicated as compared with the one for conventional magnetic amplifiers.
The first step in amplifier design is to select a single core and a pair diode to be used. Taking into account the DC load power required by the specification, a criterion may be given to determine the core size and the threshold voltage of the pair diode. Then, on the basis of the given core and pair diode, the circuit constants which satisfy the specification can be decided.
In the last part of this paper, the Darling's circuit is designed to show the design steps. The required DC load power is expressed as a parameter. A double anode connection of zenor diodes is used as the pair diode. Thus, a pair diode with the required threshold voltage can be realized. The output power obtained in practice is compared with the designed one. As a result it is clarified that this design method is useful.
