Patent application number | Description | Published |
20130155743 | POWER SUPPLY SWITCH APPARATUS - A power supply switch apparatus includes a voltage decreasing circuit, a rectification circuit, a comparison circuit, and a control circuit. The voltage decreasing circuit receives a first alternating voltage output from a power supply and converts the first alternating voltage to a second alternating voltage. The rectification circuit receives the second alternating voltage and converts the second alternating voltage to a first direct voltage. The voltage regulating circuit receives the first direct voltage and converts the first direct voltage to a second direct voltage. The comparison circuit receives the second direct voltage, compares the second direct voltage with a reference voltage, and outputs a control signal. The control circuit receives the control circuit and connects the power supply to different circuits according to the control circuit. | 06-20-2013 |
20130156068 | TEMPERATURE TEST SYSTEM - A temperature test system for detecting temperatures in a test chamber includes a switch module, a detecting module, a control module, a decoding module and a display module. The switch module inputs test instructions to select a test position in the test chamber. The detecting module detects a temperature signal of the test position according to the test instructions. The control module receives the temperature signal, and converts the temperature signal to a temperature value. The decoding module decodes the temperature value to digital signals. The display module receives the digital signals to display. | 06-20-2013 |
20130162975 | FAN ROTATION SPEED DETECTION SYSTEM - A fan rotation speed detection system includes a sampling and modulating unit, a lighting unit, a light sensing unit, a demodulating unit, and a control chip. The sampling and modulating unit generates a sampling frequency signal. The sampling frequency signal is a square wave signal. The lighting unit emits light on fan blades of a fan when the square wave signal is at a high level. The light sensing unit senses light reflected from the fan blades and generate a detection signal. The demodulating unit demodulates the detection signal to generate a demodulated signal when the square wave signal is at a high level. The control chip accounts a rotation speed of the fan according to the demodulated signal. | 06-27-2013 |
20130163296 | POWER CIRCUIT - A power circuit includes an input terminal receiving alternating current, a first AC filtering circuit connected to the input terminal, a bridge rectifier circuit, a DC filtering circuit, a DPDT switch, and an output terminal. Two input ends of the bridge rectifier circuit are connected to the first AC filtering circuit. The DPDT switch includes a first pair of pins, a second pair of pins, and a pair of output pins. The first pair of pins is connected to the DC filtering circuit. The second pair of pins is connected to the input terminal. The DC filtering circuit is connected to the pair of output pins of the DPDT switch. The first pair of pins is switched on to enable the output terminal to output direct current, and the second pair of pins is switched on to enable the output terminal to output alternating current. | 06-27-2013 |
20130200920 | POWER SUPPLY TEST SYSTEM - A power supply test system for testing reliability of a power supply includes a voltage input circuit, a voltage storage circuit, a voltage output circuit, and a discharge circuit. The voltage input circuit receives a first AC voltage, and converts the first AC voltage to a first DC voltage to charge the voltage storage circuit. The voltage storage circuit receives the first DC voltage, and discharges to the power supply via the voltage output circuit when the voltage storage circuit is fully charged. The voltage storage circuit discharges remaining voltages via the discharge circuit when the test is complete. | 08-08-2013 |
20130222007 | POWER SUPPLY TEST SYSTEM - A power supply test system for testing the reliability of a power supply includes a controlling input module, a signal collecting module, a signal input module, an alarm module, and a display module. The controlling input module inputs a time signal and a test signal in the signal collecting module. The signal collecting module turns on the power supply according to the test signal. When the power supply is turned on, the power supply outputs a power on signal, the signal collecting module records the time the test starts. When the power supply breaks off, the power supply outputs a power off signal, the signal collecting module records the time the power supply breaks off and outputs an alarm signal. The alarm module receives alarm signal and alarms to indicate the test is over. The display module displays the time the test starts and the power supply breaks off. | 08-29-2013 |
20130241312 | POWER SUPPLY SYSTEM - A time-limited power supply system for providing power to an electronic device includes a first input module, a controlling module, a switch module, a display module, and an alarm module. The first input module inputs a power on time signal in the controlling module. The controlling module receives the power on time signal and outputs a power on control signal accordingly. The switch module receives the power on control signal and provides an AC voltage to the electronic device for a set time. The display module displays the time for which the power on state will continue. The controlling module outputs an alarm signal when a remaining power on time is less than a certain period of time. The alarm module issues an audible warning to remind the user that the power on time of the electronic device may need to be extended. | 09-19-2013 |
20130293257 | TESTING SYSTEM FOR POWER SUPPLY UNIT - A testing system for testing a power supply unit, includes a testing board, an electronic load board, and a capacitor choice circuit. The testing board is connected to a power supply unit to receive a DC voltage from the power supply unit. The testing board includes an output port. The electronic load board is connected to the output port of the testing board. The output port outputs the DC voltage to the electronic load board. The capacitor choice circuit is connected to the output port. The capacitor choice circuit includes a plurality of capacitor assemblies. Each capacitor assembly includes a switch and a capacitor. The capacitor is connected to the output port via the switch. Switches of the plurality of capacitor assemblies are turned on or off in different combinations to obtain different capacitances in the capacitor choice circuit for testing the power supply unit. | 11-07-2013 |