The transformer analog computer

The Transformer Analog Computer (TAC) is a very versatile machine capable of solving problems in a-c networks and also linear simultaneous equations with complex coefficients. With the aid of TAC, it is possible to determine the latent roots of matrices and zeros of polynomials, and also the data required to plot the Nyquist diagram of a servosystem. In this paper, the principle of operation of TAC is explained briefly, and a detailed description of the new double-ended unit developed here is given, along with examples to show how the operation and interconnection of TAC become as simple as in the case of the conventional A-C Network Analyzer. The special parallel interconnector employed for the double-ended units is described and the precautions to be taken while making connections for a multimesh network are indicated. Special emphasis is laid on the fact that, on the basis of the modified system of connection, TAC is rendered eminently suitable for centralized plugging-board operation; and the plugging diagram is a replica of the actual network under study. Details in respect to an improved type of nonlinear compensator and an inexpensive direct measuring system are given towards the end of the paper.