Novel zero ripple DC current transformer design

A new circuit of DC ripple-free current transformer (DCCT) is proposed to a chieve the high-accuracy, the high-speed, the high-reliability and the no h ysteresis effect in sensing of current for power electronic applications. T his DCCT consists of two phase (opposite phase) transistor-core-based multi vibrators synchronized to clock pulses with build-in oscillators, In this p aper, the operating principal and experimental results, both on static and dynamic characteristics are presented, Moreover, the response time of 2 mu sec under 3kHz of clock pulse is also reported.