Abstract: A battery apparatus with voltage-balancing control and a method controlling the same employ a voltage-balancing module, which balances voltage values of multiple series-connected batteries of the battery apparatus, and accumulates voltage difference values of each battery relative to reference voltage values to adjust an allowable discharge control parameter Duty for each battery. By virtue of a cycle for updating the Duty, voltage differences of the multiple series-connected batteries can be lowered below a preset value.

Abstract: A cabinet includes a cabinet body, a monitoring system main unit and several connection interfaces. The cabinet body includes an accommodation chamber surrounded by an inside wall for accommodating electronic machines. The monitoring system main unit is mounted inside the cabinet body. The monitoring system main unit has signal lines arranged within the accommodation chamber. The connection interfaces are respectively and electrically connected to the signal lines and disposed within the accommodation chamber for the installation of different sensors. The monitoring system main unit includes a storage unit, a display unit, connection ports, a network interface and a control unit, so the monitoring system main unit is capable of displaying the data of the sensors on the display unit or a remote computer.

Abstract: A surge protection device has a pulse controlled switch, a pulse generation circuit and an abnormal voltage detection circuit. The surge control switch is connected in series to a power line loop and has at least one control terminal respectively connected to output terminals of the pulse generation circuit and the abnormal voltage detection circuit. An output terminal of the abnormal voltage detection circuit is connected to the power line loop and is located in the back end of the pulse controlled switch. The pulse generation circuit serves to send a pulse to the pulse controlled switch to close the pulse controlled switch and connect to the power line loop. When continuously detecting abnormal voltage in the power line loop, the abnormal voltage detection circuit opens the pulse controlled switch and disconnects from the power line loop so as to protect back-end equipment or circuit.

Abstract: An interruptible power supply with a power isolation circuit loop has a base with a battery chamber defined in the base, a fixed top cover, and a movable top cover. The battery chamber serves to receive a battery. The fixed top cover and the movable top cover are mounted on two ends of the base, and the movable top cover corresponds to the battery chamber. The fixed top cover has a loop switch therein connected with a power loop and having an actuation member to switch on or off the power loop. When the movable top cover is mounted on the base, an urging member formed on the movable top cover triggers the actuation member of the loop switch to connect with the power loop. When the movable top cover is removed, the power loop is disconnected. Accordingly, the UPS is economical in terms of parts, cost and space utilization.

Abstract: A method for controlling a grid-connected power supply system having multiple power supply modules, a relay commonly connected to output terminals of the power supply modules and connected between the power supply modules and a mains power grid, and a controller controlling each power supply module and the relay. The method is performed by the controller after the grid-connected power supply system is started and has steps of determining if each power supply module outputs power, activating each power supply module and charging an energy storage capacitor of the power supply module, and activating the relay when the stored voltages of the energy storage capacitors of all the power supply modules are greater than a preset peak voltage of the mains power. Accordingly, required number of relays is reduced and the size of the system can thus be more compact.

Abstract: A power supply having a power protection circuit has a rectification circuit and a converter. An input terminal of the rectification circuit is connected with the AC mains. A first voltage dependent resistor is connected with the AC mains. The converter has a transformer. A primary side of the transformer is connected with an output terminal of the rectification circuit, and the secondary side is connected to a power output terminal and a ground terminal. A Y capacitor is connected between the primary side of the transformer and the ground terminal. A surge protection module is connected between the first voltage dependent resistor and the Y capacitor. When a surge occurs between the primary and secondary sides of the transformer, a surge current is shunted by the surge protection module to the ground terminal through the Y capacitor without damaging internal components or circuits inside the power supply.

Abstract: A power-switching device with interlock mechanism has a housing with a rotary knob, a slider slidably moved into a rotation range of the rotary knob, and an activation switch mounted on a sliding path of the slider. The activation switch has a control button located on an overlapped portion of the sliding path of the slider and the rotation range of the rotary knob. When the slider approaches the rotary knob, the activation switch is activated and the rotary knob is unable to rotate for being blocked. When the slider departs from the rotary knob, the activation switch is deactivated and the rotary switch is rotatable. Accordingly, when manually bypassing a UPS by turning the rotary knob, users will not forget to deactivate the activation switch, thereby avoiding damaging the UPS.

Abstract: An interruptible power supply (UPS) has a surge cancellation and electromagnetic interference (EMI) prevention device, a charger, a battery set and a power converter. The power converter has multiple power switches, an integrated transformer and a controller. An input terminal of the surge cancellation and EMI prevention device is connected with the AC mains, and an output terminal is connected with the integrated transformer. The charger is connected with the battery set. The battery set is connected with the power switches. The integrated transformer has a primary side having a first winding and a second winding serially connected. The first and second windings respectively have multiple sub-windings. The first winding is connected with the power switches. The second winding is connected with a power output terminal and shares a part of the first winding, thereby decreasing turns of the windings and reducing the size and cost of the UPS.

Abstract: A UPS system having a system ground terminal includes a main circuit having a power input terminal set connected to the AC mains, two switches respectively corresponding to a live line and a neutral line of the AC mains, a frequency detection module connected to the power input terminal set, a voltage division module composed of multiple voltage dividers, and the two switches and a central controller grounded through the system ground terminal and connected to the frequency detection module. The system ground terminal is connected to the neutral line through one of the switches. The central controller and the neutral line are equipotential after the frequency detection module detects a normal mains power and the central controller controls the switch connected to the neutral line to switch on. With the foregoing circuit, the UPS system can detect the voltage of the mains power in a simplified fashion.

Abstract: A controlling system has a computer having a controlling interface, a PDU linking to the computer and multiple electric apparatus connected and linking to the PDU and the computer. The PDU has multiple outlets, a turn-off time for each outlet. The controlling interface of the computer presets that the turn-off time for each outlet and has a shut-down option. The shut-down option has outlet numbers, a main time axis, and multiple variable time axes. Each variable time axis has a start time and an end time. A total period of each variable time axis between the start time and the end time is determined according to the shut-down period of the corresponding electric apparatus. The start time and the end time of each variable time axis are adjustable, but the total time thereof is fixed. Once the start times and the end times are determined finally, the turn-off times for the outlet numbers are calculated and further sent to the PDU.

Abstract: An uninterruptible power supply having efficiency power conversion has an AC to DC power conversion circuit, a battery power conversion circuit and a control circuit. The AC to DC power conversion circuit is parallelly connected to the battery power conversion circuit to convert the AC power of an AC mains into a DC power and supply the DC power to a load. When the AC mains stably supplies power, the control circuit controls to activate the AC to DC power conversion circuit and supply power to the load through the AC to DC power conversion circuit only. As there is only one power conversion between the AC mains and the load, the power conversion efficiency can be enhanced.

Abstract: A method of remotely controlling power distribution units enables the power distribution units to automatically transmit messages to a server once connected to the server via a network. When a user logs into a server and requests to remotely control the associated power distribution units, the user only needs to enter the serial numbers or identification data thereof. The server then automatically searches for all power distribution units owned by the user, and provides a group management interface. The user can then group the power distribution units according to their locations or their properties in order to control the on and off thereof. Without knowing the IP addresses of the power distribution units, the user can readily control the power distribution units at different locations remotely.

Abstract: The DC/DC converter has a full bridge circuit, a transformer and a rectifying unit. The full bridge circuit is connected to a source DC voltage. The transformer is connected to full bridge circuit and receives the source DC. The transformer has a stationary winding and at least one selectable winding connected in series. If the source DC voltage is lower than a threshold value, the switch is turned on to increase the coupling ratio of the transformer. Therefore, the transformer converts the source DC to a DC voltage in a required voltage level.

Abstract: A control method of an uninterruptible power supply (UPS) for extending a discharge time under a no-load condition instructs a battery of the UPS to discharge by repeating an alternate on and off cycle when the UPS enters a battery mode and after a no-load condition continues over a period of time so that the UPS alternately and repeatedly discharges and stops discharging based on the alternate on and off cycle, and detects if the no-load condition is not present during the discharging period. If not present, the battery is restored to continuously discharge. Additionally, the discharge voltage can be reduced during the discharging period to alleviate the power discharged under the no-load condition. Accordingly, the control method can reduce to discharge under the no-load condition and further extend a discharge time under a no-load condition.

Abstract: The DC/DC converter has a full bridge circuit, a transformer and a rectifying unit. The full bridge circuit is connected to a source DC voltage. The transformer is connected to full bridge circuit and receives the source DC. The transformer has a stationary winding and at least one selectable winding connected in series. If the source DC voltage is lower than a threshold value, the switch is turned on to increase the coupling ratio of the transformer. Therefore, the transformer converts the source DC to a DC voltage in a required voltage level.

Abstract: A control panel having a pivotable connector has a body, a rear cover and a connector. The connector is pivotally mounted inside the body and the rear cover, and has a plug being pivotable and freely aligned with an intended direction. Accordingly, users can adjust the orientation of the connector based on a position on which the control panel is to be mounted, placed or hung, so that the connector of the control panel can be smoothly connected with a connection port of the machine directly or through a connection cable.

Abstract: The present invention discloses a power adapter has a power converter, a power output cable, a first DC power connector and multiple second DC power connectors. The power converter has a casing, a power converting circuit mounted in the casing, and an AC power inlet and DC power outlet electronically connected to the power converting circuit. The power output cable has a DC output and selective connector having two DC power pinholes and multiple selective pinholes surrounding the two DC power pinholes. The first DC power connector has two DC voltage pins and is selectively connected to the DC output and selective connector. Each of the second DC power connectors has a body, a DC plug formed on the body, two DC voltage pins formed on the body and one jumper pin formed on the body and corresponding to the selective pinholes of the power output cable to change voltage of the DC power output from the power converting circuit.

Abstract: An uninterruptible power supply supporting active loads includes a charge and discharge module having a battery set and a charger charging the battery set with an input power, a switch circuit having at least two active switches connected to the battery set, a dynamic PWM control module connected with each of the active switches of the switch circuit, alternately outputting duty cycles composed of low-frequency square wave and high-frequency square wave and alternately controlling each of the active switches to turn on or off, and a transformer having a primary side connected with the switch circuit and a secondary side whose two terminals are connected with an output capacitor generating a filtering function in collaboration with an leakage inductor in the secondary side of the transformer. The uninterruptible power supply generates a quasi-continuous output satisfying the hold-up time demanded by an active load.

Abstract: A power-saving line interactive UPS has a power switch set, a low-frequency transformer, a full-bridge circuit, a main controller, a charge and discharge mode controller, a rechargeable battery and a high-frequency charging circuit. The high-frequency circuit is connected between an AC power input terminal and the rechargeable battery to convert the AC power into a DC power and charge the rechargeable battery. Therefore, when the AC power is normally supplied and the power capacity of the rechargeable battery is not full, the high-frequency charging circuit is activated to charge the rechargeable battery without charging the rechargeable battery through the low-frequency transformer and the full-bridge switching circuit, thereby effectively reducing overall power consumption.

Abstract: A front-end circuit of a power converter has a power connection wiring detecting circuit, a power switch and a control unit. The power connection wiring detecting circuit is connected to an AC power. The control unit is connected to the power connection wiring detecting circuit. The power switch is connected to the power loop. The control unit turns on or off the AC power loop through the power switch. When the power connection wiring is correctly connected with the AC power, the control unit turns on the power switch and the front-end circuit outputs the AC power to the back-end circuit. When the power connection wiring is incorrectly connected with the AC power, the control unit turns off the power switch and the AC power is not outputted to the back-end circuit.