40results about How to "With overvoltage protection function" patented technology

The invention discloses a pressure type water flushing system which comprises a first container, a second container and a communicating element for communicating the first container and the second container, wherein the first container is provided with a first water inlet and a water discharging opening; water flows into the first container from the first water inlet; water of the second containerflows into the second container from the first container through the communicating element; in the water inlet process, air in the first container and the second container is gradually compressed tobe stored at the upper part of the second container; and during the water discharging, compressed air pushes the water in the first container and the second container to be discharged from the water discharging opening. The pressure type water flushing system can solve the problems of large size and installation inconvenience of a pressure water tank using the existing structure, and has the characteristics that the size is small, and the installation is flexible.

The invention discloses a phase-controlled reactive power dynamic compensation device and a compensation method thereof. The device includes a control and detection circuit, a compensation capacitor, and a compensation transformer; the secondary winding of the compensation transformer is connected to the bus bar after being connected in series with the capacitor, and the two ends of the primary winding are respectively connected to different phase lines or neutral lines of the bus bar through several selection switches ;By controlling the on-off of the selector switch, the primary winding is selectively applied with the same phase voltage, out-of-phase phase voltage, or line voltage connected to the secondary winding; the combination of the multiple selector switches forms multiple compensation gears bit. This device comprehensively applies out-of-phase phase voltage, in-phase phase voltage and line voltage on the input coil of the primary winding of the compensation transformer, and adjusts the transformation ratio to compensate the secondary output. The structure is simple but it is easy to realize dynamic compensation. High efficiency and good compensation effect. The compensation device and method of the present invention are applicable to all voltage levels of the existing power grid and various occasions such as substations and electrified railways.

The invention discloses a primary battery type trace oxygen analyzer. An electrolytic cell is connected with a primary battery in series, and a detection gas circuit is in parallel connected with a bypass pressure regulator after entering into a channel; when the gas flows through a bypass gas circuit, a gas circuit is washed, stabilizing pressure needed by the detection gas circuit is produced, and the surplus gas in the bypass is discharged by a vent nozzle. The electrolytic cell is provided with a matched water storing and replenishing device, and a liquid level of an alkaline liquor in the electrolytic cell is controlled in a specified marked line. The primary battery and the electrolytic cell can regularly work for a long time. A gas outlet of the primary battery is connected with a micro-motion safety device in series, and the gas is exhausted from the gas outlet to prevent the alkali liquor from staining and damaging a detection gas circuit system due to unexpected backstreaming when the pressure at the gas outlet of the primary battery is excessive. With the adoption of the primary battery type trace oxygen analyzer, the trace oxygen in various industrial gas can be quickly detected, the industrial gas on line detection is carried out, multiple other trace oxygen analyzers are simultaneously detected when the primary battery type trace oxygen analyzer is used as an calibration instrument, and the oxygen standard gas in the range of 2-50PPMv is checked and compared; and the primary battery type trace oxygen analyzer has the effects of convenient and quick to use, and the comparison result is accurate and reliable.

The invention discloses a circuit for a pulse plasma thruster, which comprises an ignition circuit, an energy storage circuit and a control circuit, wherein a singlechip in the control circuit outputs chopped wave signals; and pulse transformers in the ignition circuit and the energy storage circuit charge an ignition capacitor and an energy storage capacitor. When sampling voltages of the positive input ends of two voltage comparators reach a set ignition voltage and a set energy storage voltage respectively, the singlechip stops outputting the chopped wave signals, and after a set delay time, outputs ignition signals which generate trigger pulse high-tension electricity by the pulse transformer in the energy storage circuit, and then the pulse high-tension electricity is discharged to break gas discharge tubes down to produce electric spark to trigger ignition. The circuit has the advantage of realizing quick and controllable charge and accurate triggered ignition.

The present invention provides a 200W LED drive power circuit, which includes a strip-shaped PCB substrate packaged with the LED drive power circuit. The LED drive power circuit includes an EMI filter rectifier circuit, a Boost circuit, a Buck circuit, and a load circuit. The EMI filter and rectifier circuit is connected to the AC power supply. The Boost circuit is used to receive the signal rectified by the EMI filter and rectifier circuit and output a DC high voltage signal. The Buck step-down circuit is used to reduce the DC high voltage signal to a constant voltage and output it to A load circuit; wherein, a chip power supply circuit is also provided between the Boost voltage boosting circuit and the Buck voltage reduction circuit for providing power to the voltage reduction chip of the Buck voltage reduction circuit. The power supply circuit of the present invention is simple in design, can realize stable constant current output, has overvoltage protection function, and the output current can be adjusted according to the current required by the actual LED; The lighting range can be expanded.