Unit current transformer device and magnetic induction power supplying device for linearly controlling output power by using the same
The present invention relates to a unit current transformer device and a magnetic induction power supplying device, and particularly to a magnetic induction power supply unit capable of linearly adjusting output power according to the number of unit current transformer devices configured to have a specific resonance frequency. To this end, the unit current transformer device includes a current transformer inducing secondary current from primary current flowing through a line in a magnetic induction manner and having a resonant frequency double or greater than that of the primary current, and a converting unit converting an output of the current transformer to DC power.
1. An apparatus comprising:
a plurality of unit current transformer devices for linearly adjusting output power, each comprising:
a current transformer connected to a line indirectly and detachably, and configured to induce current by using a magnetic field in the line; and
a converting unit converting an output of the current transformer to DC power,
wherein each converting unit includes:
a primary voltage rectifying unit converting the induced current by the current transformer to a DC voltage;
a current converting unit converting the converted DC voltage by the primary voltage rectifying unit to a current; and
a secondary current rectifying unit converting the converted current by the current converting unit to a DC current;
wherein the current has a resonant frequency double or greater than that of the current flowing through the line;
wherein the apparatus further comprises;
a summing unit summing each of the DC currents output from each of the plurality of unit current transformer devices and outputting the summed DC currents;
wherein an output by the summing unit is linearly proportional to the number of the plurality of unit current transformer devices.
2. The apparatus of claim 1 , wherein each current transformer has a cross-section area, a length, a relative permeability, and a number of loop windings around the magnetic core satisfying the resonant frequency.
3. The apparatus of claim 1 , wherein each current transformer has a minimum size for satisfying the resonant frequency.
4. The apparatus of claim 1 , wherein each current transformer is a separable current transformer.
5. The apparatus of claim 1 , wherein each current converting unit is controlled with a pulse width modulation.
6. The apparatus of claim 1 , further comprising:
a DC/AC converting unit converting an output by the summing unit to an AC power.