The theoretical analysis of open-loop characteristic for double magnetic detector comparator

An original double detector sensing theory with magnetic modulator and magnetic amplifier is discussed. The open-loop characteristic of the double detector is calculated theoretically and the double magnetic detector comparator has been constructed for testing and performance evaluation. Both the calculation and testing prove that the open-loop characteristic of the double detector comparator has only one operating point corresponding to zero ampere turns, and no other zero output points or so called false-balance points. The double detector comparator possesses not only high sensitivity, low drift, high linearity and good antimagnetic property for magnetic modulator comparators, but also good stability and reliability for magnetic amplifiers.