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 invention discloses a hardware-in-loop test platform for a new energy vehicle power battery management system. A battery cell simulation unit of the hardware-in-loop test platform is used for sending battery cell electrical failure mode configuration information to a battery cell electrical failure injection unit under the control of a computer; the battery cell electrical failure injection unit is used for inputting the battery cell electrical failure mode configuration information into a measured BMS controller so that the measured BMS controller is used for carrying out a correspondingbattery cell electrical failure mode test; an I / O signal electrical failure injection unit is used for inputting I / O signal failure configuration information into the measured BMS controller under thecontrol of the computer so that the measured BMS controller is used for carrying out a corresponding I / O signal failure test of the measured BMS controller. Complete hardware-in-loop automated testing, including full-function testing of a main board and a slave board, of the battery management system can be realized, so that the reliability of the battery management system is improved.

The invention is a correlation type optoelectronic switch which adopts two pairs of infrared light tubes changing-over and used for an occasion of a border detection or an end-of travel position detection, for example, an elevator running leveling locating detection and the like. With the help of being provided with two pairs of the infrared light tubes with a changing-over function, the service life of a transmitting tube is greatly improved and is characterized in that the antijamming capability is strong, the circuit is simple and the power dissipation is low. The changing-over type correlation trough type optoelectronic switch adopts various voltage regulator circuits and protective circuits so that the range of the voltage regulators is broad. Signal is output by a square-wave generator to drive an infrared emission module and the received signals are dynamically alternating-current couped to be given to a control output circuit so as to have a strong antijamming capability. The changing-over type correlation trough type optoelectronic switch is provided with two pairs of the infrared light tubes of A and B, when the infrared light is shielded, one pair of the infrared light tube which are worked originally (for example the pair of the infrared light tube A) stops working so that the other pair of the infrared light tube (for example the pair of the infrared light tube B) is switched to work. When the infrared light is not be shielded, the state remains as before. When the infrared light is shielded again, the working pair of the infrared light tube (for example the pair of infrared light tube B) is stopped working, and the pair of the infrared light tube A is switched to work.

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.

The invention provides a micropressure steam valve of an electric rice cooker. The micropressure steam valve comprises an upper valve shell, a lower valve shell and a counterweight, wherein the lower valve shell is fastened with the upper valve shell, and the counterweight is arranged in a space formed by the upper valve shell and the lower valve shell. The top of the upper valve shell is provided with an exhaust hole, the bottom of the lower valve shell extends upwardly to form a step-shaped upright, the lower end of the upright is hollowed to form air inlet ends, and the air inlet ends upwardly extend to penetrate a step of the upright to form air inlet holes. The counterweight sleeves the upper end of the upright. The invention further provides the electric rice cooker. The inside of the electric rice cooker is kept in a micropressure state through the micropressure steam valve according to structural design, steam generated by boiling liquid in the electric rice cooker is discharged in time, most steam is liquefied and flows back in the steam valve, and temperature of the discharged steam is reduced. The micropressure steam valve has an overpressure protection function and is capable of avoiding too high pressure of the steam in the electric rice cooker. The electric rice cooker with the micropressure steam valve is safe, energy saving and capable of meeting requirements of modern life.