145 results about "Double switch" patented technology

The invention provides a single-phase five-level topology and an inverter. The single-phase five-level topology comprises a first capacitor, a three-level bridge arm module and four switching tubes, wherein the four switching tubes refer to a first switching tube, a fifth switching tube, a sixth switching tube and an eighth switching tube respectively; each switching tube is reversely connected in parallel with a diode; the three-level bridge arm module comprises two switching tubes and a double-switch unit; the first end of a third switching tube is connected with a first node, and the second end of the third switching tube is connected with a neutral point N through the double-switch unit; and the first end of a fourth switching tube is connected with N through the double-switch unit, and the second end of the fourth switching tube is connected with a second node. Five level states are output, the current harmonic content of a system is reduced, the filter inductance is reduced, the voltage level is raised, the common-mode voltage is restrained, and the running efficiency is increased. Balanced control of capacitor voltage under full power and full modulation can be realized without adding an additional hardware circuit, and the phase output voltage of the system is prevented from degrading from five levels to three levels.

A double-switched automatic sprinkler valve in a field of automatic controlling devices for cooling and fire fighting is disclosed. A memory alloy, sleeved outside a manual adjusting rod at an upper part of a valve lid, opens and closes a valve according to temperature changes. The valve can also be opened and closed by rotating the manual adjusting rod. A piston is provided within a valve body. A bias spring, provided at an internally upper part of a valve cover, has an upper part resisting against an internally upper part of the valve cover. A movable rod, a magnetic loop assembly and a magnetic loop sheath together are sleeved outside a piston barrel. The manual adjusting rod is rotated into a middle hole of the movable rod. A heat concentrating cover is connected to the manual adjusting rod via rotating.

The invention provides a system and a method for realizing voice control for household electrical equipment. The system comprises the components of a plurality of handheld equipment, a voice recognition cloud server, a host computer, a coordinator, a double-switch module and controlled household electrical equipment. Each set of handheld equipment comprises a voice recording module, a voice recognition local module and a handheld-end communication module. The host computer comprises a host-end communication module, a voice processing module and a master control module. The system and the method according to the technical solution of the invention can realize quick control for the household electrical equipment by a plurality of users based on the handheld equipment, namely voice controlling by a plurality of terminals in one home is realized. Furthermore the function of existing handheld equipment is greatly expanded, and convenient service for the people is realized.

A power supply double switch controller has a ballast and a controller on the ballast having a first and second switch connector. A first switch is connected to the first and second switch connector on the ballast. The first switch connector is a toggle switch with a first switch first position and a first switch second position. The second switch is connected in series to the first switch. The second switch is a toggle switch with a second switch first position and a second switch second position. A mode dimming cycle is programmed on the controller. The controller is configured to recognize a momentary power outage at the first and second switch connector when the second switch travels from a second switch first position to a second switch second position.

This invention relates to circuit device suitable for middle and large power, which comprises one communion and one inverter, wherein, the said communion adopts double switch three level lift circuit composed of three-phase circuit composed of six diodes to input three-phase alternating fire line and to convert the three phase current into six wave impulse direct current; the two lift direct to direct current converter is located between the three-phase bridge circuit and two filter capacitor to output direct mother line voltage; each lift direct to direct converter is composed of one inverter inductance, one exchanger switch and one pair of diodes.

The invention discloses a compensating three-phase active power factor correcting circuit, which comprises an uncontrolled three-phase active power factor correcting circuit, and is characterized in that the compensating three-phase active power factor correcting circuit is provided with a three-phase compensating circuit, namely a controllable three-phase double-switch power factor correcting circuit; three input ends of the controllable three-phase double-switch power factor correcting circuit are connected with three input ends of the uncontrolled three-phase active power factor correcting circuit; and two output ends of the controllable three-phase double-switch power factor correcting circuit are connected with two output ends of the uncontrolled three-phase active power factor correcting circuit. The compensating three-phase active power factor correcting circuit combines respective advantages of independent and uncontrolled three-phase active power factor correcting circuits, can keep sine wave forms of input current and corresponding input voltage similar and phases same, achieves full sine of three-phase input current, has higher input power factor and power density, effectively reduces 'pollution' of a switch power supply on an electric network, and also can obviously reduce the number of switch power supply devices, the volume of the switch power supply and the cost of the switch power supply and further improve product performance and market competitiveness.

The present disclosure provides a power rectifier for a Radio Frequency Identification tag circuit. The power rectifier is constructed from a pair of complementary MOS transistors. Gates of the transistors have predetermined voltages applied to them. The applied voltages bias the transistors to near their active operating regions, while an additional RF control signal is being applied to only one of the gates of the transistors in the complementary pair.

The invention discloses a double-switch magnetoresistive motor system based on synchronous drive. The system comprises a power convertor, a direct-current power supply, a position detector, a controller, a main switch magnetoresistive motor and a sub switch magnetoresistive motor, wherein the position detector is used for detecting and acquiring position state information of a rotor of the main switch magnetoresistive motor; the controller is used for constructing and generating a group of driving signals according to the position state information so as to control the power convertor; and the power convertor is used for controlling the connection and the disconnection of each stator winding of the two switch magnetoresistive motors according to the driving signals. The synchronous drive of the two motors can be realized through only one set of power convertor, the main and sub motors synchronously run naturally, and net balance is not caused between the two motors. The power convertor is of the simplest structure, and only one switch tube and only one freewheel diode are required for each phase. When the main motor is in a power generation state and the sub motor is in an electric state, the sub motor can be directly driven without additional intermediate energy decoupling device and power convertor.

The invention discloses a double-switch power supply modulator for an envelope tracking system and belongs to the field of integrated circuits. The double-switch power supply modulator for the envelope tracking system mainly solves the problem that a power supply modulator of an envelope tracking amplifier in the prior art is low in efficiency and cannot well meet system requirements. The power supply modulator is of a double-switch converter structure and comprises a linear amplifier stage, a main switch converter stage and a compensation switch stage, output current is combined into an output signal of the whole power supply modulator, and power is supplied to a radio frequency power amplifier. Due to the fact that current output from a linear stage is compensated for by adding the compensation switch stage, the output current of a low-efficiency linear amplifier is reduced, and the overall efficiency of the system is improved.

The invention discloses an infrared-ultraviolet composite therapeutic apparatus, which is used for treating skin diseases through the combined action of infrared rays and ultraviolet rays. The infrared-ultraviolet composite therapeutic apparatus comprises an infrared and ultraviolet double light source, a lamp cover, a movable supporting rod, a power supply and a control platform, wherein the control platform comprises a double-switch control system, a temperature control system and a time control system. The infrared-ultraviolet composite therapeutic apparatus can irradiate the skin of each part of the human body and effectively treat various skin diseases, such as leucoderma and the like; and the infrared-ultraviolet composite therapeutic apparatus has the advantages of simpleness, safety and reliability in operation, obvious treatment effect, easiness in being accepted by patients, and the like.

The control device of an electric power converter comprises a control circuit controlling turn-on of power semi-conductor arms. The control circuit comprises a module for determining possible turn-offs of an arm, and a module for selecting turn-offs enabling double switching from among the possible turn-offs. Selection of turn-offs enabling an arm of said converter to be turned off according to the turn-offs enabling double switching in other arms. The electric converter comprises one such control device. The method comprises determination of turn-offs enabling double switching from among the possible turn-offs, and selection of turn-offs to turn an arm of said converter off according to the turn-offs enabling double switching.

The invention discloses a visual implementation method for a sequential function chart, which includes the two steps: firstly, designing a double switch-case code generation pattern of the sequential function chart; and secondly, calling a sequential function chart code generation tool for checking rules and outputting codes. A first switch structure is used for updating state variable values, and a second switch structure is used for operating corresponding control execution functions according to the new state variable values, and switching states and executing action in the same operational cycle. Visual programs are clearly organized by means of classifying page types and defining conception rules, and state switching and execution are completed in the same cycle by the aid of the double switch-case code generation pattern, so that the operational efficiency of the sequential function chart is improved.

The invention discloses an LED (Light-Emitting Diode) mini-type desk lamp, comprising a supporting base, a first lamp cover board and a second lamp cover board. A first groove is arranged on the lower surface of the first lamp cover board; a plurality of LED lamps are arranged in the first groove; a plane mirror is arranged on the upper surface of the first lamp cover board; a second groove is arranged on the upper surface of the second lamp cover board; the plurality of LED lamps are arranged in the second groove; a first switch is arranged on the side surface of the first lamp cover board; a second switch is arranged on the side surface of the second lamp cover board; and the supporting base, the first lamp cover board and the second lamp cover board are hinged in sequence end to end. With the adoption of the manner, the LED mini-type desk lamp provided by the invention uses double switches, so that the LED mini-type desk lamp is flexible to control; an internal battery is chargeable, so that the LED mini-type desk lamp can be used without being plugged with a power supply, can be flexibly folded, has a small size after being folded, and further can be used as a mirror.

The invention relates to a switch on-off spring operating mechanism of a grounded switch and an isolation switch, the design of the switch on-off spring operating mechanism is mainly as follows: grounded clutch turning wheels and isolation clutch turning wheels are respectively arranged between a grounded gear shaft and a grounded energy storage shaft, and between an isolation gear shaft and an isolation energy storage shaft; the grounded clutch turning wheels and the isolation clutch turning wheels consist of outer wheels, inner wheels, clutch paws and torsional springs; the outer wheels are actively connected to the inner wheels and hinged with the clutch paws through the torsional springs; the clutch paws are tightly fastened with a paw grooves of the inner wheels in the action of the torsional spring; the grounded output shaft and the isolation output shaft are the same output shaft; the grounded output shaft is fixedly connected to a grounded driving crank arm; a grounded transmission crank arm for linking the clutch paw is arranged between the grounded driving crank arm and the grounded clutch runner; the isolation output shaft is fixedly connected to an isolation driving crank arm; and an isolation transmission crank arm for linking the clutch paw is arranged between the isolation driving crank arm and the isolation clutch turning wheel. The switch on-off operating mechanism disclosed by the invention is compact in structure, reliable, convenient and safe in operation and use and suitable for being used as a double-switch correlation lock operating mechanism.

The invention discloses an output filter circuit of an active power filter, a filtering method and a design method. The output filter circuit of the active power filter comprises an inverter side inductor L1, a network side inductor L2, a network side shunt resistor Rg, a damping branch RdCd, a high pass branch Ch, a single-switch harmonic branch CfLf and a double-switch harmonic branch CfdLfd. According to the output filter circuit of the active power filter, the filtering method and the design method, a DRLCL circuit can effectively filter out higher harmonic higher than 1kHz, single-switch harmonic and double-switch harmonic, the filtering effect fully meets the requirements of all orders of harmonic in IEEE519-1992, and the complexity of a control system will not be increased.

The present application relates to a double-switch-valve-based self-powdering brake apparatus and a system. The apparatus comprises a drive mechanism, a hydraulic pump, a first switch valve, a second switch valve and a brake assembly; the oil inlet port of the first switch valve is connected with the oil outlet port of the hydraulic pump, a control end of the first switch valve opens or closes the oil outlet port of the first switch valve on the basis of a first control instruction received by the control end; the oil inlet port of the second switch valve is connected with the oil outlet port of the first switch valve, the oil outlet port of the second switch valve is connected with the oil inlet port of the hydraulic pump, the second switch valve opens or closes the oil outlet port of the second switch valve on the basis of a second control instruction received by the control end; the brake assembly is connected with the oil outlet port of the first switch valve for generating a brake actuation signal on the basis of the flow rate of the oil outlet port of the first switch valve. The double switch valve-based self-powdering brake apparatus and system can avoid the problems of poor contamination resistance and serious oil leakage of the self-powdering brake device in the prior art.

The invention discloses an uninterruptible power supply with the functions of reactive power compensation and active filtering. The power supply comprises a city power input end, a load output end, an active filter, a reactive power compensator, a converter, a storage battery, a double-switch device and a centralized controller. The centralized controller controls the converter to work in a rectified state when city power is normal, switches on the active filter and the reactive power compensator to carry out harmonic suppression and reactive compensation on city power, powers an external load, and stores energy for the storage battery. The centralized controller controls the converter to work in an inversion state when city power is abnormal, inverse direct current output by the storage battery into alternating current to provide uninterruptible power supply for the external load. The power need of the load is met. The power supply quality is improved. The conversion efficiency of the uninterruptible power supply is greatly improved. The energy use ratio is improved. The heat of a system circuit is reduced. The service life of the uninterruptible power supply is prolonged.

A liquid dispensing massage device includes a container having an opening and adapted to contain a quantity of liquid; a spring biased dispensing assembly comprising a retaining cap releasably secured to the opening of the container; a massage assembly comprising a shell mounted on an outer surface of the container and a vibration unit disposed in the shell, the vibration unit comprising a DC motor, a manually moveable first switch mounted on the shell, a PCB, and a battery; and a second switch electrically interconnected to the motor and the first switch and comprising a spring depressible member and a sliding trigger having one end engaged with the spring depressible member and the other end projecting out of the shell to engage with an outer surface of the opening of the container. The motor is activated when both switches are on.

The invention relates to the field of low-voltage power supply facilities, in particular to an intelligent weigh box and application thereof. The intelligent weigh box comprises a box body which internally comprises left and right cavity body space, and is characterized in that an intelligent phase-change switch, a distributing terminal, a double switch A and a double switch B are successively arranged on the left side cavity body of the box body from top to bottom; a plurality of electric energy meters are successively arranged on the right side cavity body of the box body from top to bottom;a load line is in series connection among the intelligent phase-change switch, the distributing terminal, the double switch A and the electric energy meters, the electric energy meters are connectedwith a user through the double switch B, and each electric energy meter is connected with the intelligent phase-change switch through an electric energy pulse signal line. The intelligent weigh box integrates a three-phase equilibrium function, an electricity larceny prevention function and a marketing and power distribution information integrated monitor function and is suitable for rural powernetwork transformation and urban electric network upgrade, the product intelligence degree is high, the weigh box is provided with telecommunication and control functions, and the marketing and powerdistribution integrated management can be achieved.

The invention relates to a converter in a power generation system, in particular to a DCDC converter in a photovoltaic power generation system. The DCDC converter in the photovoltaic power generation system comprises an input end Ui and an output end Uo and is characterized in that a capacitor C1 and the source electrode of a MOS transistor Q1 are respectively connected with the input end Ui; the negative electrode of a diode D1 and one end of an inductor L1 are respectively connected with the drain electrode of the MOS transistor Q1; the other end of the inductor L1 is connected with the source electrode of a MOS transistor Q2; the positive electrode of a diode D2 is connected with one end of an inductor L2, and the other end of the inductor L2 is connected with a capacitor C2; the capacitor C2 is connected to the output end Uo and connected with the positive electrode of the diode D1 and the drain electrode of the MOS transistor Q1. According to the DCDC converter in the photovoltaic power generation system, a double-switch Buck-Boost circuit of a hardware current conversion mode is adopted, the adjustable range of input and output voltage of the double-switch Buck-Boost circuit is wide, and therefore the DCDC converter is applicable to occasions where the change range of voltage is wide.

The present invention discloses a double-switch tail button structure. The double-switch tail button structure comprises a tail ring; the tail ring is provided with a first switch group and a second switch group; the first switch group comprises at least two parallel-connected touch switches; and the second switch group includes a touch switch. According to the double-switch tail button structure of the invention, the first switch group is designed to be a ring-shaped distribution structure surrounding the second switch group, and the first switch group and second switch group jointly realize double-switch control of a controlled circuit; the plurality of surrounding touch switches have no directionality, and therefore, operation is quicker and more convenient; and the tail button structure is simpler.

The utility model relates to a solenoid type determinator for relative magnetic susceptibility, which belongs to a magnetism determination device on strong magnetism minerals; wherein, one end of a thin-walled glass tube of the determinator is connected with an analytical balance; the main body is inserted into a hollow solenoid coil, which is connected with a double switch; the double switch is connected with a direct-current power supply and a switch. The switch is connected with the direct-current power supply, and a direct-current amperemeter is connected in the loop of the switch. The utility model has the advantages that the structure is simple, the thin-walled glass tube inserted into the hollow solenoid coil is always stable and the measurement is precise.

The invention provides an installation method of a trademark, which concretely comprises the following steps: manually putting a trademark into an accommodating groove of a workpiece table, pressing a double-switch button and starting equipment; adsorbing the trademark by using a vacuum suction nozzle; carrying out destaticizing treatment on the trademark adsorbed on the vacuum suction nozzle by using an ion air nozzle; driving the trademark subjected to destaticizing treatment by using the vacuum suction nozzle; photographing the trademark and a case by a dual-vision system, respectively, and calibrating the pictures of both, and adjusting the position of the trademark if the trademark and the case have a position difference until there is not any position difference between the trademark and the case; adhering the trademark at a corresponding position of the case, and blowing by the vacuum suction nozzle so as to break the vacuum; and pressing the trademark by using a pressing device to tightly adhere the trademark on the case. The installation method of the trademark has the advantages that not only the automatic installation of the trademark can be realized, but also the installation position of the trademark is accurate and the installation quality is improved.

A double-switched automatic sprinkler valve in a field of automatic controlling devices for cooling and fire fighting is disclosed. A memory alloy, sleeved outside a manual adjusting rod at an upper part of a valve lid, opens and closes a valve according to temperature changes. The valve can also be opened and closed by rotating the manual adjusting rod. A piston is provided within a valve body. A bias spring, provided at an internally upper part of a valve cover, has an upper part resisting against an internally upper part of the valve cover. A movable rod, a magnetic loop assembly and a magnetic loop sheath together are sleeved outside a piston barrel. The manual adjusting rod is rotated into a middle hole of the movable rod. A heat concentrating cover is connected to the manual adjusting rod via rotating.

The invention discloses a single power converter drive-based double-switch reluctance motor operation control system, which comprises a DC power supply, two switch reluctance motors, an asymmetrical half-bridge power converter with a traditional structure, a position detector, six current sensors and a controller. By the system, operation drive of the two switch reluctance motors can be achieved only by one power converter; and the two motors are individually controlled. Various phase stator coils are connected to different bridge arms, so that various phase currents are not mutually affected. Meanwhile, higher torque can be output to bear a higher load under the condition of not increasing the system cost and a fault; and the stability and the reliability of the motor operation system are ensured.

The invention discloses a modular multilevel converter for high-voltage DC power transmission and a control method thereof. The modular multilevel converter includes three phase units. Each phase unit includes an upper bridge arm and a lower bridge arm which are symmetrical. Each bridge arm includes N sub modules and a reactor connected in series with the sub modules. The sub modules are double-clamped sub modules. According to the modular multilevel converter for high-voltage DC power transmission and the control method thereof, the MMC can be equivalent to two separate sub topological structures to achieve working states such as double switch-on, double switch-off, single switch-on single switch-off, and single switch-off single switch-on, and the sub modules can be sorted through a voltage-frequency weighting method to make the switching frequency of the IGBTs of the sub modules uniform.

The invention relates to the technical field of a large-screen touch all-in-one machine, and particularly relates to a temperature control system and a temperature control method. The temperature control system comprises a master control system, a temperature sensing circuit which detects temperature of the circuit board in the machine body, and a temperature control circuit which issues a temperature control instruction. The master control system controls the temperature sensing circuit and the temperature control circuit. The temperature control circuit comprises a power-off switch circuit for emergency power-off protection. The power-off switch circuit is a double-switch circuit comprising a drive circuit switch and an execution command switch. The drive circuit switch controls the execution command switch. Temperature of the circuit board can be monitored in real time so that the service life of the circuit board is guaranteed, damage to electronic parts and components can be prevented, fire hazard caused by over-temperature of the circuit board can be avoided, the execution command switch supplies power only when power is needed, and thus energy is saved.

The invention relates to the technical field of nano-drugs and the field of drug controlled release, in particular to a pH and ultraviolet light double-control drug delivery carrier based on an inorganic nano silicon material and a preparation method of the double-control drug delivery carrier. Through modification of the periphery of porous channels of the inorganic nano silicon material, a pH control part and an ultraviolet light control part are grafted and are linked to the same cyclodextrin through chemical bonds and hydrophobic interaction. Through double switch control, the release of a drug can be more accurately controlled; given the advantages of high drug loading capacity, good stability, easiness in modification and the like of the inorganic nano silicon material, the physiological pH of the cancer tissue and the physiological pH of the inflammatory site are both lower than that of normal tissue. The double-control drug delivery carrier has wide application prospect in the aspect of preparation of preparations for accurately controlling drug release, in particular to cancer and inflammation treatment.

The invention relates to an alternating current-direct current power supply changing circuit, and aims at providing a double-switch voltage reduction type direct current-direct current switching circuit. The switching circuit comprises an output capacitor Co, an inductor L, a diode D1, a first switch tube S1 and a second switch tube S2, wherein the switching circuit is connected with a direct current input; a positive end of the direct current input is connected with one end of the inductor L, and a cathode of the diode D1; the other end of the inductor L is connected with one end of the second switch tube S2, and one end of the output capacitor Co; the other end of the output capacitor Co is connected with an anode of the diode D1, and one end of the first switch tube S1; the other ends of the second switch tube S2 and the first switch tube S1 are connected with a negative end of the direct current input; and direct current outputs are arranged at the two ends of the output capacitor Co, and connected with a load. With the adoption of the switching circuit, the continuous alternating current input current can be realized on the basis of maintaining low direct current output voltage, and a power factor of the alternating current input current can be increased greatly.

The invention discloses a large power parallel double-switch forward DC / DC power supply module comprising switch tubes Q1, Q2, transformers T1, T2, a PWM control circuit, an input filter capacitor C1, an output filter capacitor C2, a rectifier circuit, a feedback and overvoltage protection circuit, and an overcurrent protection circuit; the power supply module employs an integrated design; a DC / DC converter power circuit employs an interlace parallel double-switch forward circuit topology form; the circuit portion designs two single-end switch forward circuit topology forms to be integrated and paralleled so as to realize power expansion, thus solving the problems that a domestic same-size product uses two power conversion magnetic cores, and an output power cannot reach a foreign same-kind product, so four power conversion magnetic cores can satisfy DC / DC power supply module power conversion requirements; the large power parallel double-switch forward DC / DC power supply module is small in size, high in efficiency and reliability, good in heat radiation performance, and wide in application scope.