2 results about "Secondary circuit" patented technology

The invention discloses a novel alternative current high voltage acquisition circuit which comprises a high voltage resistor, a micro-transformer of current, an air gap protection device and a resampling circuit, wherein the high voltage resistor is connected in series with a primary coil of the micro-transformer of current, the air gas protection device is connected between two ends of the primary coil of the micro-transformer of current, and the resampling circuit is connected between the two ends of a secondary coil of the micro-transformer of current. The novel alternative current high voltage acquisition circuit firstly converts primary high voltage into weak current signals, and then samples the weak current signals and converts the signals into secondary low voltage signals in such a manner that the structure of a secondary circuit is simpler. In addition, primary voltage is isolated from secondary voltage. Furthermore, current signals are transmitted between the primary voltage and the secondary voltage, and high resistance to interference is achieved.