Anomalous Power Efficiency of a Transformer Driven by Tuned Duty Cycle Pulses

The author (O. Ide) has made a prototype of an inverter which makes efficient use of positive EMF (references [1] and [2]) to be caused by well-tuned duty square wave. And, it is observed that the power efficiency of the inverter prototype reaches 300% plus at maximum while easily exceeding 100% (reference [3]). The theme of the discussion of this report is the power efficiency characteristics of a transformer itself to compose an inverter, as the author thinks there is a possibility for it to be different from that of the total inverter unit which is already discussed in the above-mentioned references, while putting a focus on it as a single separate unit. In the result of a research based on the experimentally measured data, it has been discovered that the former is quite different from the latter. It has been also discovered that the value of the input power to the primary coil can be either positive or negative, depending on the value of the load connected to the secondary coil. In addition, it was recognized that there exists a critical point of the load value at which the value of the input power becomes zero. This means that at such a critical point the power efficiency of the transformer itself becomes infinite, and that in the negative region of the load value, the value of the input of the transformer must become negative. In other words, energy is flowing out even from the input terminals of the primary coil of the transformer. After an analysis of the wave form data experimentally obtained, it becomes clear that such a phenomenon occurs due to the phase difference between voltage and current of the primary coil of the transformer.