8results about How to "Stable voltage output" patented technology

The invention provides a resonant converter parameter optimization method and system of an electric vertical take-off and landing aircraft, and relates to the technical field of aviation power electronics. The method comprises the following steps: constructing an improved equivalent circuit model containing transformer secondary side leakage inductance; deriving a voltage gain function expression of the improved equivalent circuit model and an optimization calculation formula of the excitation inductance required for realizing the soft switching; parameter optimization is carried out based on the voltage gain function expression and the excitation inductance optimization calculation formula; and building an LLC resonant converter experimental prototype according to the optimized parameters, and carrying out system verification and performance evaluation. According to the invention, the problem of performance reduction caused by neglecting secondary side leakage inductance under a high-frequency working condition in a traditional design is solved, the efficiency, the voltage stabilization precision and the power density of the converter are remarkably improved, and the high requirement of eVTOL on an airborne power supply is met.

The application provides a sub-module quantity optimization configuration method of a modular multilevel converter, relates to the field of converters, and is applied to a segmented half-bridge-full-bridge hybrid modular multilevel converter including three-phase bridge arms, each phase bridge arm being composed of an upper bridge arm and a lower bridge arm, the upper bridge arm including cascaded half-bridge sections and full-bridge sections, the half-bridge section including at least two cascaded half-bridge type sub-modules, and the full-bridge section including at least two cascaded full-bridge type sub-modules, and the method comprises the following steps: constructing an amplitude function of an energy difference term of the half-bridge section and the full-bridge section; constructing an energy coupling degree function of the half-bridge section and the full-bridge section; constructing a bridge arm energy coordination function based on the amplitude function of the energy difference term of the half-bridge section and the full-bridge section and the energy coupling degree function; and determining the number of the half-bridge type sub-modules included in the half-bridge section and the number of the full-bridge type sub-modules included in the full-bridge section, so that the converter has the advantages of efficient and reliable support.

The utility model relates to a touch mouse control circuit with a vibration feedback function, and relates to the technical field of mouse control circuits. The device comprises a controller, a power supply module, a first boosting module, a second boosting module, a motor driving module, a vibration feedback motor and a touch sensor, and the output end of the touch sensor is electrically connected to the input end of the controller; the voltage output end of the power supply module is electrically connected to the input ends of the first boosting module and the second boosting module, the output end of the first boosting module is electrically connected to the power supply end of the controller, and the output end of the second boosting module is electrically connected to the power supply end of the motor driving module; the vibration feedback motor is in controlled connection with the motor driving module, and the motor driving module is in controlled connection with the controller. The method has the advantages that clear feedback can be provided for customers, and the use experience is improved.

The utility model relates to realize bidirectional voltage conversion voltage stabilizing circuit and control circuit, wherein realize bidirectional voltage conversion voltage stabilizing circuit includes bidirectional voltage stabilizing / half voltage stabilizing circuit, bus capacitor, fixed proportion conversion circuit and high voltage bus, and the input side is connected with the output side through bidirectional voltage stabilizing / half voltage stabilizing circuit, high voltage bus and fixed proportion conversion circuit in proper order, and one end of bus capacitor is connected to high voltage bus, and its other end is grounded, is used for buffering filter, and the application realizes the bidirectional voltage conversion of high speed response and the stable voltage output through the synergistic effect of bidirectional voltage stabilizing / half voltage stabilizing circuit, bus capacitor and fixed proportion conversion circuit, and the accurate adjustment of control circuit.

The application discloses a device for coupling electrically-driven anaerobic ammonia oxidation-denitrification by using a microbial fuel cell, comprising a microbial fuel cell and a microbial electrochemical reactor; wherein the microbial fuel cell is single-chambered, the anode is an anaerobic sludge membrane-hung carbon brush, and the cathode is carbon cloth; the working electrode of the microbial electrochemical reactor is a carbon brush, anaerobic ammonia oxidation flocculent sludge is inoculated into the reactor under anaerobic conditions, and after stable biofilm is formed, the device is operated under anoxic conditions. When the device is used for degrading organic matters by using the microbial fuel cell, the generated electric energy is used for driving the anaerobic ammonia oxidation process in the microbial electrochemical reactor to couple denitrification for removing nitrogen elements in wastewater, so that no external electric energy is consumed, and recyclable electric energy can be generated, and no secondary pollution is caused, so that the device is an environment-friendly wastewater treatment structure which is capable of removing nitrogen and carbon.

The utility model relates to the technical field of currency counters, and discloses a high-precision current-controlled constant current source currency counter, which comprises a currency counting mechanism, an energy supply control mechanism is arranged at the top end of the currency counting mechanism, the currency counting mechanism comprises a main machine body, a currency inlet is arranged below the front end of the main machine body, and a currency outlet is arranged below the rear end of the main machine body. An electric guide rail is fixedly installed in the middle above the front end of the main machine body, and an electric lifting seat is slidably assembled on the outer side of the electric guide rail. According to the utility model, the UPS power supply is adopted to supply power to the currency counting machine, so that the voltage output can be stabilized, the currency counting machine can be ensured to work stably under the rated voltage, and the influence on the accuracy and efficiency of currency counting caused by the damage or unstable work of electronic components of the currency counting machine due to the abnormal voltage can be avoided; therefore, the stability and the anti-interference capability of the current stabilization source are improved.

The utility model discloses a PID temperature control circuit applied to a microbial culture monitor. The PID temperature control circuit comprises a PID controller and a PID control circuit, the PID controller is used for receiving target temperature, incubation frame bias temperature and PID control parameters issued by the upper computer, receiving temperature parameters, sent by the PID control circuit, of all incubation frames in real time, conducting PID operation on the temperature parameters, outputting PWM adjusting signals to the PID control circuit according to operation results, and adjusting the temperature of the incubation frames by changing the output quantity of the PID control circuit. And the output power of the heating component or the refrigerating component is adjusted. The three-state buffer can buffer and isolate signals, prevent noise from interfering with the PID controller, protect the sensitive PID controller from being damaged by a rear-end circuit, and prevent residual output signals of the PID controller from influencing turn-off logic. In emergency, the output of the PID controller is cut off according to the emergency stop signal, so that the power switch device is quickly closed, the power output of the temperature control load is stopped, and the emergency stop function is realized.