Abstract: The transformer has a bobbin, a coil assembly and a magnetic core assembly. The bobbin is mounted in the magnetic core assembly and has multiple connecting pins being formed on at least one side of a bottom surface of the bobbin. Each connecting pin has a top surface as a soldering surface that corresponds to a solder pad on a back of a circuit board. At least one fastener is further formed on the bottom surface of the circuit board. Therefore, when the transformer is mounted through the circuit board, the connecting pins are soldered on the back of the circuit board to reduce the total thickness of the combination of the transformer and the circuit board.

Abstract: A digital automatic monitoring and power breaking safety socket has a shell in which an electrical connection base is mounted for connecting to a power line and an external line plug inside. A power switch is connected in series between the electrical connection base and the power line. A digital power monitoring circuit is coupled to the power line detect the power status to control the power switch based on the power status. Further, a power line data communication circuit is mounted in the shell and connects to the digital power monitoring circuit to obtain and process the power status. The processed power status is loaded into the power line that connects to the electrical connection base. Therefore, in addition to automatic power breaking and supplying, a remote power management host is able to obtain the power status and remotely control the socket.

Abstract: A resonant circuit has two parallel resonant branches and one assistant inductor connecting the two resonant branches. Each resonant branch has a series capacitor and a series inductor connected in series. The other end of the series inductor is for connecting to a primary side of a transformer unit. The resonant circuit can provide two characteristic resonant frequencies fr and fm, so that a resonant power converter using the resonant circuit has an operating frequency fs that satisfies fs>fr or fm<fs<fr. The combination of the two resonant branches and the assistant inductor can reduce the frequency switch range of the resonant power converter within a specific voltage gain.

Abstract: A power supply is mounted in a case for a computer and has a shell, a blower assembly and multiple electrical components. The shell has a rear surface, a heat sink chamber, an electrical component chamber, an air inlet and an air outlet. The chambers have front end communicating with each other. The air inlet and the air outlet are formed through the rear surface of the shell. The blower assembly is mounted in the shell and is adjacent to the rear surface of the shell. The electrical components are mounted in the electrical component chamber and generate heat when the computer operates. The heat-dissipating method of the power supply is to extract air from outside the computer case into the shell to dissipate the heat generated by the electrical components. Using air at room temperature from outside the case is much more efficient to cool down the power supply.

Abstract: A mounting device for chips has a heat sink and at least one clamp. The heat sink has at least one conductive side, two ends, multiple chip units and two connecting bases. The chip units are arranged on the at least one conductive side. The connecting bases are formed on the ends of the heat sink. The at least one clamp is mounted across the at least one conductive side of the heat sink and has two ends, a middle sheet, multiple pressing tabs and two connecting arms. The pressing tabs extend from the middle sheet to press the chip units against the conductive side of the heat sink. The connecting arms are formed respectively on the ends of the clamp and are mounted respectively on the connecting bases.

Abstract: A power line communication device having DC power output and network signal transmission abilities has a casing, a power cable connector, a network signal converting circuit and a first connecting interface. The network signal converting circuit is connected to the power cable connector, sends and receives network signals over a power cable connected to the power cable connector and transforms an AC power source to a DC power source. The first connecting interface is connected to the network signal converting circuit for connecting to and exchanging the network signals with an external network device and has a network port and a DC power output port. The DC power output port outputs the DC power source from the network signal converting circuit to the external network device. Therefore, the first connecting interface is capable of outputting the DC power source and transmitting the network signals.

Abstract: A slope compensation method and circuit for a peak current control mode power converter circuit is provided. Since the power converter circuit has a synchronous signal of a driven signal of enabling the first primary switch and the second primary switch, a triangular wave signal is generated. The driven signals of the first and second primary switches determine the ramp up time of the triangular wave signal. The triangular wave signal is added to one of the output DC voltage feedback signal of the corresponding power converter circuit that are used to compare with a current peak value of the voltage feedback signals. Therefore, a high level triangular wave DC voltage feedback signal that is higher than the DC voltage feedback signal is formed, and the switching noises do not effect comparing result of a PWM controller of the power converter circuit.

Abstract: A hold-up time extension controlling device for a power supply, that has a power factor correction circuit, a hold-up time extension circuit, a hold-up time controlling circuit, a storage capacitor and a DC to DC converter. The hold-up time extension controlling device has a switch and an auxiliary capacitor. When an AC power source is normal, the switch is controlled to turn on according to the power factor correction circuit to make the auxiliary capacitor connecting to the storage capacitor in parallel to averagely have a ripple current. When the AC power source is interrupted, the switch is controlled to turn off. At the time, the hold-up time extension circuit obtains a storage power of the auxiliary capacitor and then output to the DC to DC converter to keep the voltage of the storage capacitor at a preset voltage for a long time.

Abstract: An AC/DC converter includes a rectifier circuit, at least one restraining unit, and a power interruption detection circuit. The rectifier circuit is used for converting an AC (alternating current) to a DC (direct current) power source. The restraining unit is connected to an output terminal of the AC power supply. The restraining unit includes a resistor and a switch connected in parallel. The power interruption detection circuit detects whether an input power cycle is regular. When the input power cycle is interruptive, a signal is generated to change a state of the switch in the restraining unit to make the resistor of the interfere in the circuit to restrain an inrush current in any operational circumstance, such as warm startup or quick startup.

Abstract: A transformer is to be electrically connected to a circuit board. The transformer has a bobbin, a copper sheet assembly and a coil assembly. The bobbin has two side plates and a winding core on which a primary winding, a secondary winding and a magnetic core assembly are mounted. The copper sheet assembly as the primary or the secondary winding has multiple copper sheets. Each copper sheet is an inverted U-shape with two legs, and is mounted on a groove defined on the winding core. Engaging structures formed on the copper sheets and the grooves steadily hold the copper sheet assembly on the winding core to prevent the copper sheets from shifting to incorrect positions. A conducting board below the bobbin connects the copper sheets in sequence. Since the loops formed by the copper sheets and the electrical connector are more nearly concentric, leakage inductance of the transformer will reduce.

Abstract: The transformer has a bobbin, a coil assembly and a magnetic core assembly. The bobbin is mounted in the magnetic core assembly and has multiple connecting pins being formed on at least one side of a bottom surface of the bobbin. Each connecting pin has a top surface as a soldering surface that corresponds to a solder pad on a back of a circuit board. At least one fastener is further formed on the bottom surface of the circuit board. Therefore, when the transformer is mounted through the circuit board, the connecting pins are soldered on the back of the circuit board to reduce the total thickness of the combination of the transformer and the circuit board.

Abstract: A power supply with performance display is disclosed. The computer power supply mainly has a power converter, a control module, and a display. The control module receives and processes the operating signals from the power converter, and then sends those processed signals to a display in a numerical value form. The power supply can be applied in a computer, an adapter, or other electronic products, which is convenient for users to know the operating status of the power converter.

Abstract: A computer power supply with a display function has a rectifying circuit, an EMI filter, a power factor corrector, a switching circuit, a transformer and a secondary coil voltage regulator located between an AC voltage input and a DC voltage output. A linear rectifying circuit as a major technique connects to the output of the power factor corrector to detect power dissipation and represent the result in a display, thus user can take necessary measures when a computer draws excessive power.

Abstract: An power switching device includes a base with input wires and output wires electrically connected to the base and opposite to the input wires, multiple conducting tubes electrically connected to and orthogonally mounted on the base, and multiple conducting plates each having holes to selectively allow an extension of some of the conducting tubes and screw holes selectively defined to correspond to and allow a bottom face of each of the screw holes to abut free ends of the rest of the conducting tubes such that screws are able to threadingly extend from the screw holes and into the free ends of the conducting tubes abutted to the bottom faces of the screw holes to secure engagement between conducting plate and the conducting tubes.

Abstract: A power adapter includes an insulating casing including an enclosing wall and defining a sealing chamber therein, a power transforming unit disposed in the sealing chamber, and a heat sink device including a heat dispersing member supported within the sealing chamber at a position between the enclosing wall and the power transforming unit to thermal-communicate with the power transforming unit, wherein the heat dispersing member has an air insulating cavity formed above the power transforming unit in such a manner that when the power transforming unit generates heat for heating up air within the air insulating cavity, the heat is diffused throughout the air insulating cavity so as to evenly disperse on the enclosing wall of the insulating casing.

Abstract: A power supply releasing device is a one-piece plate which includes a handle and a fulcrum part on one side of the plate and an engaging piece extends from one of two ends of the plate. A protrusion extends from one surface of the plate. A hole and a curved slot are defined through the plate and a geometric arc formed by the curved slot has a center coincident with the center of the hole. Two rivets respectively extend through the hole and the curved slot and are connected to the power supply. When releasing the power supply, the user simply pivots the plate by pulling the handle to let the fulcrum part contact a vertical surface of the support frame and the power supply is pulled out relative to the support frame by the rivet in the curved slot in the plate.

Abstract: A rotary adapter comprises a main body, a fixing piece, and a plug. The main body further comprises: a circular recess containing a central platform; a plurality of first fastening portions spaced along the inner edge of the circular recess; and a channel formed with a positioning block and two symmetrical guide tracks disposed on respective banks thereof. The fixing piece is provided with a rail on each of two sides thereof corresponding to the guide tracks, and with a retaining portion arranged on one side of the fixing piece.

Abstract: A power converter with synchronous rectifying through the control of a current transformer is disclosed. The basic architecture of the power converter includes a flyback transformer (10), a switch controller (20) and a current transformer (30). The secondary winding of the flyback transformer (10) is connected to the primary winding of the current transformer (30) used to control the switch controller (20). The primary winding of the current transformer (30) is connected to a synchronous rectifying switch (Q7). If a current change occurs on the secondary winding of the flyback transformer (10), the current transformer (30) detects the phase change and enables the switch controller (20) to switch off the synchronous rectifying switch (Q7). The current transformer (30) turns off the synchronous rectifying switch (Q7) anticipatorily in the continuous current output mode to prevent any power loss from crossovers.

Abstract: A device for manually turning-on at least one circuit-breaker from the front panel of a cabinet includes at least one sleeve having a front end and a rear end. The sleeve extends through an aperture in the front panel and is movable between a backward position, in which the front end of the sleeve projects slightly from the front panel, and a forward position, in which the front end of the sleeve projects away from the front panel. A spring is compressed to push the sleeve from the forward position to the backward position. A rod is operably connected to the sleeve so as to be displaced following the forward movement of the sleeve and to remain in its position uneffected by the backward movement of the sleeve.