Abstract: This present invention relates to a paralleled power conditioning system with circulating current filter, comprising: an input terminal for receiving a input power; a plurality of power conditioning units; and a load. Each power conditioning unit includes: a DC/DC converter coupled to the input for receiving the input power so as to convert the input power to a DC voltage; a DC/AC inverter coupled to the DC/DC converter for converting the DC voltage to a AC voltage; and a filter coupled to the DC/AC inverter for eliminating the noise generated by the AC voltage and the circulating current among the plurality of power conditioning units so as to generate a filter voltage. The load is connected to the plurality of power conditioning units. The plurality of power conditioning units are connected in parallel to the load.

Abstract: A frisbee comprises a frame consisting of a plurality of mutually engaged sections, an outer cover over the frame having a plurality of through holes of which a central through hole is further provided with a string binding section, a first string passing through a rolling bead, a second string movably connected to the rolling bead and a control rod. The second string goes through a hollow section and is connected to the control rod. Thereby, the frisbee may achieve the functions of throwing, receiving, flinging, catching and rotating, suitable for entertainments and promoting a user's health.