Abstract: An adapter equipped with a wire winding and holding apparatus comprises a circuit laying section to hold a conversion circuit, a wire holding section to define a holding space and a wire winder movably held in the holding space. The wire winder includes two conducting wire ends which are extensible and retractable and electrically connected to each other. One of the conducting wire ends is electrically connected to the conversion circuit. Two positioning arms are extended from the same side of the adapter to define the holding space. The wire winder is guided by the two positioning arms and movably pulled out or retracted in the holding space to be anchored. The two positioning arms have respectively an extended laying space communicating with the circuit laying space.

Abstract: A tightly coupled iron core set and winding rack structure includes a winding rack and an iron core set. The winding rack includes a hollow bobbin, a first partition board and a second partition board extended radially from openings at two ends of the bobbin, and a plurality of pin sections located on the second partition board. The first and second partition boards have respectively at least one latch portion. The iron core set includes a core running through the bobbin and a plurality of latch notches coupled with the latch portions to hold the iron core set on the winding rack. Thus the iron core set can be directly latched on the winding rack to form coupling without using extra bonding or latching tools.

Abstract: An adapter equipped with a wire winding and holding apparatus comprises a circuit laying section to hold a conversion circuit, a wire holding section to define a holding space and a wire winder movably held in the holding space. The wire winder includes two conducting wire ends which are extensible and retractable and electrically connected to each other. One of the conducting wire ends is electrically connected to the conversion circuit. Two positioning arms are extended from the same side of the adapter to define the holding space. The wire winder is guided by the two positioning arms and movably pulled out or retracted in the holding space to be anchored. The two positioning arms have respectively an extended laying space communicating with the circuit laying space.

Abstract: An improved switch for power factor correction circuits includes a six-terminal switch which has a first inductor connecting to a selection line which has a first switch terminal and a second switch terminal, and a second inductor connecting to a conductive line. When the switch is at a first position, the selection line is connected to the first switch terminal, and the conductive line is closed to determine the first and second inductors in a parallel coupling condition and the power conversion circuit in a first duty condition. When the switch is at a second position, the selection line is connected to the second switch terminal and the conductive line is open to determine the first and second inductors in a serial coupling condition, and the power conversion circuit in a second duty condition.

Abstract: The present invention discloses an improved passive power filter circuit, wherein a rated compensating voltage is provided for the power factor compensating circuit in order to solve the problem of instable power output resulting from that the rated voltage is obtained via bypassing the standby power supply circuit in the conventional technology. Further, in the present invention, a circuit is used to pre-charge two filter capacitors, which are coupled to the DC output terminals of a rectifier, in order to offset the current phase advance or the current phase lag, which the conventional passive power filter circuit cannot solve, and thereby, the power factor is improved.

Abstract: An improved switch for power factor correction circuits includes a six-terminal switch which has a first inductor connecting to a selection line which has a first switch terminal and a second switch terminal, and a second inductor connecting to a conductive line. When the switch is at a first position, the selection line is connected to the first switch terminal, and the conductive line is closed to determine the first and second inductors in a parallel coupling condition and the power conversion circuit in a first duty condition. When the switch is at a second position, the selection line is connected to the second switch terminal and the conductive line is open to determine the first and second inductors in a serial coupling condition, and the power conversion circuit in a second duty condition.

Abstract: The present invention discloses an improved passive power filter circuit, wherein a rated compensating voltage is provided for the power factor compensating circuit in order to solve the problem of instable power output resulting from that the rated voltage is obtained via bypassing the standby power supply circuit in the conventional technology. Further, in the present invention, a circuit is used to pre-charge two filter capacitors, which are coupled to the DC output terminals of a rectifier, in order to offset the current phase advance or the current phase lag, which the conventional passive power filter circuit cannot solve, and thereby, the power factor is improved.

Abstract: The present invention discloses an improved power filter circuit, which provides a power supply integrating the passive power filter circuit and the active power filter circuit, wherein via designing the configuration of the circuit, the present invention combines the advantages of the power passive filter circuit and the active power filter circuit and avoids the disadvantages thereof; the active power filter circuit can offset the current phase advance or the current phase lag, which the passive power filter circuit can not solve, and thus, a low-cost power filter circuit having superior output efficiency can be provided.