Abstract:
A programmable AC power distribution device includes a control circuit board disposed on a connecting plate. A fixing plate is disposed in a case. The connecting plate is connected to the fixing plate through a coupling member. Thereby, the connecting plate with the control circuit board can be disassembled only by removing the coupling member. When the control circuit board is to be reinstalled, the connecting plate can be easily fixed to the fixing plate through the coupling member. The assembly and disassembly of the control circuit board can be improved effectively, thereby greatly improving the efficiency of the check and repair of the control circuit board.
Abstract:
A power output end structure of a DC power supply is disclosed. The power supply includes a casing provided with a plurality of power modules. Output terminals of the power modules are electrically connected to a positive busbar and a negative busbar, respectively. The positive busbar and the negative busbar are in the form of a thin plate and arranged horizontally. The power modules are electrically connected in parallel or in series. Because the positive busbar and the negative busbar are in the form of a thin plate and arranged horizontally, the heat dissipation path in the casing won't be blocked so as to provide a better heat dissipation space and achieve a better heat dissipation effect.
Abstract:
A high power density power supply includes a plurality of cooling fans in a casing. Two sides of the cooling fans are provided with a first filter circuit board and a plurality of power modules, respectively. The first filter circuit board includes a first filter thereon. A plurality of second filter circuit boards are provided on top of the cooling fans, respectively.A second filter is disposed beneath each of the second filter circuit boards. The first filter, the second filter and the power modules are staggered each other, which takes advantage of the upper and lower spaces of the power supply to provide a good heat flow path so that the cooling fans can perform heat dissipation effectively for the power modules. The high power density power supply can achieve a better cooling effect in the casing of the same size.
Abstract:
A multiphase DC power supply with high switching frequency of 1 MHz comprising three parallel connected three phase DC power supply. Each of the d parallel connected three phase DC power supply comprises a boost power factor corrector to convert an AC power source to a rectified and filtered DC voltage, an isolation transformer connected to the boost power factor corrector to generate a full wave rectified DC voltage having stable voltage level, a duck switching circuit consisting a first, a second and a third semiconductor switches to regulate the voltage level of the output of said isolation transformer and a phase controller to manage an interleaved phase of the output of said three semiconductor switches. The multiphase DC power supply uses interleaved power factor correction technology to successfully provide a DC power supply with high switching frequency, low ripple noise and not subject to EMI.
Abstract:
An output-switch control system for an AC-DC power supply includes a push-button switch that has two triggers. The triggers correspond to different contacts of a detecting circuit, respectively. When the push-button switch is pressed to make the triggers and the contacts turn into a close-circuit state form an open-circuit state, the detecting circuit outputs a power-source-on signal, and when the push-button switch is pressed again, and either of the triggers and the contact turn into the close-circuit state form the open-circuit state, the detecting circuit outputs a power-source-off signal immediately. With the dual-transition signal certification at the contacts, safe output-switch control can be achieved, so as to provide a user with operational safety.
Abstract:
A composite push-button circuit supporting both PREVIOUS PAGE and HOMEPAGE functions includes a push button that is connected with a processor. The processor has a timer and is connected with a first function-controlling module and a second function-controlling module separately. When the processor determines that a duration where the push button remains pressed reaches a predetermined duration, the processor makes the first function-controlling module performs the HOMEPAGE function. When the processor determines that the duration where the push button remains pressed does not reach the predetermined duration, the processor makes the second function-controlling module performs the PREVIOUS PAGE function. Thereby, a user interface equipped with the composite push-button circuit can use a single button to support both the PREVIOUS PAGE and HOMEPAGE functions, thereby making operation more conveniently and efficiently.