Abstract: An uninterruptible power apparatus is coupled between a power grid and a load. The uninterruptible power apparatus includes a bypass path, a power conversion module, and a control module. The bypass path is coupled to the power grid through a grid terminal, and coupled to the load through a load terminal. The control module turns off a first thyristor and a second thyristor by injecting a second voltage into the load terminal during a forced commutation period. The control module calculates a magnetic flux offset amount based on an error amount between the second voltage and a voltage command, and provides a compensation command in response to the magnetic flux offset amount. The control module controls the DC/AC conversion circuit to provide a third voltage to the load terminal based on the compensation command and the voltage command.

Abstract: A method and apparatus for diffusing or reducing gas into a liquid is described. This invention covers several different methods for infusing or reducing gas into a liquid with a feedback loop that monitors specific parameters of the process and can vary controls to achieve a targeted value or keep within a range of values. The parameter of interest is the ORP (Oxidative Reduction Potential) and one way to determine that value is using an ORP sensor to directly measure it at various points in the process such as on the untreated incoming process fluid, right after infusing the reducing gas, or later in the process such as where the fluid is discharged back into the original tank in the case of a recirculating system or when it is discharged to the next phase of the treatment train.

Abstract: A method of transmitting data and command through an RS232 serial port incorporated with a user-end device and a server-end device connected through the RS232 serial port is disclosed and includes following steps: accumulating a value of a first counter of the user-end device and a value of a second counter of the server-end device whenever a data is transmitted from the server-end device to the user-end device; controlling the server-end device to stop transmitting the data and to wait when both of the two values reach a triggering threshold; controlling the user-end device to transmit a control command to the server-end device through the RS232 serial port while the server-end device is waiting; and, resetting the first and the second counter and controlling the server-end device to restore to transmit the data to the user-end device after a waiting time is elapsed.

Abstract: The present disclosure provides an isolated multi-phase DC/DC converter with a reduced quantity of blocking capacitors. In one aspect, the converter includes a multi-phase transformer having a primary circuit and a secondary circuit magnetically coupled to the primary circuit, the primary circuit having a first quantity of terminals, and the secondary circuit having a second quantity of terminals; a third quantity of blocking capacitors, each being electrically connected in series to a respective one of the terminals of the primary circuit; and a fourth quantity of blocking capacitors, each being electrically connected in series to a respective one of the terminals of the secondary circuit. The third quantity is one less than the first quantity. The fourth quantity is one less than the second quantity.

Abstract: The disclosure discloses a method and device for monitoring partial discharge. The monitoring method including: step a, connecting a monitoring circuit in parallel to both ends of a tested product, disposing a ground wire between the monitoring circuit and ground, disposing a first sensor in the monitoring circuit, and disposing a ground wire sensor on the ground wire; step b, applying an excitation signal to the tested product, acquiring a first signal through the first sensor and acquiring a ground wire signal through the ground wire sensor within a monitoring cycle; and step c, determining whether the tested product has partial discharge through the first signal and the ground wire signal. The disclosure can avoid the partial discharge monitoring device from wrongly determining an interference signal to be a partial discharge signal, enhance anti-interference capability of the partial discharge monitoring device, and improve monitoring accuracy.

Abstract: A ventilation fan includes a housing having an opening, a grille structure positioned to cover the opening, a fan module provided in the housing and a function module. The grille structure includes a base defining an outlet, and a grille support spaced apart from the base and connected by the connecting columns A radial inlet is formed between the base and the grille support is in communication with the outlet. The base includes a holder having a holding opening axially downward and faced away from the housing. The function module is disposed within the holder through the holding opening.

Abstract: A power supply system includes an output terminal, a power supply control chip, a power supply switch and a detection device. The power supply control chip is configured to adjust the amount of an input power providing to an electronic device by the power supply device. The power supply switch is configured to control the connection between the power supply device and the power supply control chip. The detection device is configured to detect whether the power supply control chip operates normally. When the power supply control chip operates abnormally, the detection device controls the connection between the power supply device and the power supply control chip through the power supply switch for restarting the power supply control chip. The power supply control chip, the power supply switch and the detection device are disposed in an enclosed space.

Abstract: A voltage regulator module is provided. The switch circuit assembly includes two switch circuits and an input capacitor. Respective input terminals of the two switch circuits are connected with each other in parallel. The input capacitor is electrically connected with the respective input terminals of the two switch circuits in parallel and disposed between the two switch circuits. The plurality of conductive members have a first conductive member, a second conductive member and a third conductive member. The first conductive member and the third conductive member are configured to deliver an electric energy. The second conductive member is configured to deliver a signal. One end of each conductive member is electrically connected with corresponding switch circuit, and the other end of the first conductive member and the third conductive member is electrically connected with the load. The switch circuit assembly and the magnetic assembly are stacked with each other.

Abstract: A motor control apparatus receives a DC power source through a DC terminal and is coupled to a motor. The motor control apparatus includes a brake, an inverter, and a controller. The brake is coupled to the inverter. The brake includes an energy-consuming component and a switch component. The controller controls the inverter to convert the DC power source to drive the motor. When the controller determines that the DC power source is interrupted, the controller stops controlling the inverter, and the switch component is self-driven turned on so that a back electromotive force generated by the motor is consumed through the energy-consuming component.

Abstract: A DC/DC converter includes a high-voltage side, a low-voltage side, a high-voltage side capacitor and a power conversion circuit. The high-voltage side includes a high-voltage positive terminal and a high-voltage negative terminal. The low-voltage side includes a low-voltage positive terminal and a low-voltage negative terminal. The low-voltage negative terminal is electrically connected with the high-voltage negative terminal A first terminal of the high-voltage side capacitor is electrically connected with the high-voltage positive terminal. A second terminal of the high-voltage side capacitor is electrically connected with the low-voltage positive terminal. The power conversion circuit is electrically connected between the high-voltage side and the low-voltage side. The power conversion circuit includes at least one switch and at least one magnetic assembly.

Abstract: A shower base installation system including a shower base and shower base installation tool. The shower base includes one or more recesses on the bottom surface. The installation tool includes a handle, a strap, and a hook. The tool is used to lift and maneuver a shower base into position by engaging the hook into one of the recesses in the shower base.