Abstract:
A power supply power compensation structure uses a connector as power output ports. The power supply has a feedback signal connector. A power output connector is coupled with a transmission line set which joins another connector to couple with the feedback signal connector. Thereby power output quality can be monitored to maintain optimal output power delivered to electronic devices.

Description:
FIELD OF THE INVENTION 
   The present invention relates to a power supply power compensation structure and particularly to a power supply that provides a feedback power potential signal through a rear end electronic device via a joint wiring approach to maintain a constant potential for the voltage delivered to the electronic device to function steadily. 
   BACKGROUND OF THE INVENTION 
   In response to constant changes of Internet applications and multimedia functions, computer technologies also advance continuously. These days hardware such as hard disk drives, optical disk drives and disc burners have become fundamental facilities for users or server providers. Power supply also has to provide a greater amount of output power to meet the growing demands. The basic power of 250 W in the past is not enough now. Nowadays, 450 W, 500 W or even 600 W is required to support all the computer hardware being used. To enhance the power supply to meet the requirement of different electronic devices at the rear end, power output mode of the power supply also has significant changes. Connectors are widely used as power output ports these days. Such an approach, besides enabling users to select different power transmission lines, does not have wiring on the unused power output ports, and also can enhance air circulation in the computer to facilitate heat dissipation. 
   R.O.C patent Nos. M260929 and M256525 disclose a power supply with a connector on the rear end to serve as power output ports (referring to FIG. 1 of M256525 for wiring of the conventional power supply). Patent No. M260929 further proposes a design of composite output ports that has a power transmission line connecting to a same output port and branches to two or more connectors through a joint wiring approach to couple with electronic devices at the rear end. 
   While the aforesaid patents offer some improvements over the conventional power supply, they do not provide feedback power monitoring to maintain power quality. In fact, operation voltage actually delivered to the electronic devices from the power supply could drop due to line resistance of different transmission lines. Adopt the connector for the power output ports has constraints of potential specifications resulting to the pins of the connector. Without the power feedback function, the actual operation voltage is not sent back to the power supply to correct the fluctuating output voltage. The unstable output power quality directly affects operation of the electronic devices at the rear end. 
   SUMMARY OF THE INVENTION 
   The primary object of the present invention is to solve the aforesaid disadvantages. The invention provides a feedback power monitor structure while maintains the benefits of adopting the connector as power output ports for a power supply. The power supply has a feedback signal connector. A power output connector is coupled with a transmission line set which joins another connector to couple with the feedback signal connector. Thus power output quality can be monitored to maintain optimal output power delivered to the electronic devices. 
   The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of the power supply of the present invention. 
       FIG. 2  is a schematic view of the power supply and transmission lines in a connecting condition according to the invention. 
       FIG. 3  is a schematic view of the power supply and transmission lines in another connecting condition according to the invention. 
       FIG. 4  is a schematic view of the power supply and transmission lines in yet another connecting condition according to the invention. 
       FIG. 5  is a schematic view of the power supply and transmission lines in still another connecting condition according to the invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Please referring to  FIGS. 1 and 2 , the power compensation structure for a power supply  10  according to the invention employs a connector as power output ports. The power supply  10  includes a power input end  11  and a power output end  12 . The power output end  12  has a first power output connector  13  and a first feedback signal connector  41 . In an embodiment the first power output connector  13  has 24 pins to serve as an example for discussion. The number of pins may vary to be adopted to the connector of any specifications shown in the drawings in M260929 and M256525. The first power output connector  13  and electronic devices (not shown in the drawings) at a rear end are bridged by a first power transmission line set  50 . The first power transmission line set  50  includes a first connector  51  inserting in the first power output connector  13 , a second connector  52  inserting in the electronic devices at the rear end and a first conductive wire  53  bridging the first and second connectors  51  and  52 . The first feedback signal connector  41  and the electronic devices at the rear end are bridged by at least one first feedback power line set  60 . The first feedback power line set  60  includes at least a third connector  61  inserting in the first feedback signal connector  41  and a third conductive wire  62  connecting to the third connector  61 . The third conductive wire  62  has other end joined the first conductive wire  53  to connect the second connector  52 . 
   In this embodiment if there is any potential fluctuation (such as voltage drop) occurred to the power output by the power supply  10  through the first power output connector  13  via the first power transmission line set  50  to the second connector  52  connected to the electronic devices at the rear end, the actual power potential can be fed back via the third conductive wire  62  to the power supply  10  through the first feedback signal connector  41  to do potential correction. Hence the voltage input to the electronic devices at the rear end can be maintained at a constant potential. 
   Referring to  FIG. 3 , the power output end  12  further has a second power output connector  14  and a second power transmission line set  70 . The second power transmission line set  70  includes a fourth connector  71  inserting in the second power output connector, fifth connectors  72  and  73  inserting in the electronic devices at the rear end and a second conductive wire  74  bridging the fourth and fifth connectors  71 ,  72  and  73 . As shown in the drawings, the second power transmission line set  70  is coupled with a plurality of fifth connectors  72  and  73  that have different number of pins. The third conductive wire  62  of the first feedback power line set  60  is branched to jointly connect to the second connector  52  and fifth connectors  72  and  73  at the same time to be linked to the first feedback signal connector  41 . Referring to  FIG. 4 , the power supply  10  may also have a second feedback signal connector  42  and a second feedback power line set. The second feedback power line set has at least one sixth connector  65  inserting in the second feedback signal connector  42  and a fourth conductive wire  66  connecting to the sixth connector  65 . The fourth conductive wire  66  has other end joined the second conductive wire  74  to be connected to the fifth connectors  72  and  73 . Similarly, the fourth conductive wire  66  may also be branched to concurrently connect the second connector  52  and fifth connectors  72  and  73 . Referring to  FIG. 5 , the joint connection point may be the insertion pin location with the potential same as the second connector  52  and fifth connectors  72  and  73 . And a third conductive wire  62  and the fourth conductive wire  66  are jointly connected to the third connector  61  of the first feedback signal line set  60 . All the embodiments set forth above can monitor the power quality and maintain the actual voltage input to the electronic devices at a constant potential. 
   While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.