215results about How to "Achieve shutdown" patented technology

The invention discloses a method for controlling terminal automatically, which includes the following steps: an induction device is installed in the terminal; the operation of the terminal parts is controlled automatically when the induction device detects special object within the range of prearrange distance. By using the method, the harddisk can be comprehensively protected and the power consumption of the peripherals such as keyboard or mouse can be saved, moreover, automatic startup or shutdown of the terminal, automatic forwarding and backwarding of the browser, and automatic turn-page of the application software can be realized. Corresponding to the method, the invention also includes a terminal control system and a terminal installed the control system.

The invention discloses a general band gap reference starting circuit, which is a current comparison structure and composed of a self-biasing circuit, a current mirror comparison circuit and a pull-down transistor. When used for a voltage mold band gap reference starting circuit, reference currents only need to meet a certain range, the circuit is simple in structure. When used for a current moldband gap reference circuit, the band gap reference circuit works in a wrong working state due to multiple degeneracy points, a current comparison result quickly starts up the starting circuit and enables the band gap reference circuit to be in a normal working state. Simultaneously, a new current comparison result immediately opens the starting circuit, and the reference circuit is not influenced. The starting circuit has good adaptation to working voltage, is not influenced by power voltage change including transient fluctuations and less influenced by process angles, and a circuit structureis simple, thereby being easy to achieve. The general band gap reference starting circuit effectively solves the starting problem of the band gap reference circuits of the two modes and is generally applied to the band gap reference circuit structure under complementary metal oxide semiconductors (CMOS) process.

The invention discloses a Boost type isolated DC/DC converter and a control method of the Boost type isolated DC/DC converter. The Boost type isolated DC/DC converter is composed of a primary side circuit, an auxiliary side circuit, an ideal transformer and a two-port passive network, wherein the primary side circuit is composed of a full-bridge unit circuit where interleaved Boost circuits are integrated, the auxiliary side circuit is composed of a rectifying circuit, the two-port passive circuit is composed of an inductor and a capacitor and is an energy transmitting unit, and the transformer is used for achieving isolation and transformation. Two interleaved Boost input inductors are connected in the middles of two bridge arms of the full-bridge unit circuit, and therefore the gain range of the isolated DC/DC converter is widened, and input current ripples are reduced; frequency-fixed PWM control is adopted, the duty ratio D of a bridge arm switching tube is controlled, and therefore the output voltage can be adjusted. The Boost type isolated DC/DC converter and the control method have the advantages of being wide in input voltage range, small in input current ripple, fixed in switching frequency, capable of allowing soft switching to be achieved, small in switching loss and the like, and are particularly suitable for renewable energy power generation systems and other systems.

A synchronous control method of a three-phase alternating current solid-state power controller belongs to the control method of the alternating current solid-state power controllers. The method adopts a 'slow turn-on and slow turn-off mode' to control the turn-on and the turn-off of the three-phase alternating current solid-state power controller, each phase utilizes the reverse serial connection of two power field effect transistors to control the turn-on and the turn-off of a load, when the power field effect transistors are controlled to be turned on, gate-source voltage of the power filed effect transistors is controlled to be slowly increased, thereby causing on-resistance of the power filed effect transistors to be gradually reduced and further realizing the slow turn-on; when the power filed effect transistors are controlled to be turned off, the gate-source voltage of the power filed effect transistors is controlled to be gradually decreased to threshold voltage of the power filed effect transistors, the power field effect transistors are gradually increased and gradually transited to a full turn-off state, thereby realizing the slow turn-off; the method can not only realize the synchronous turn-on and the turn-off of the three phases and can improve the power supply quality, but can also inhibit switch instantaneous du/dt and di/dt, reduce the complexity of a control circuit and reduce the size and the weight, thereby being applicable to a power supply system with arbitrary working frequency.

A high-efficiency intelligent high-side electronic load switch with wide voltage adaptability comprises a power supply module, a core control module, a self-boosting module, a voltage detection module, a current detection module and a switching module. The core control module is used for signal acquisition, information processing and storage and logic control; firstly, the core control module receives an external switch control input signal and detection signals output by the current detection module and the voltage detection module and processes and analyzes monitoring data according to an internally stored program to control the switching module to complete corresponding actions; secondly, the core control module provides a PWM control signal for the self-boosting module. The voltage detection module and the current detection module are used for detecting the real-time operating voltage and current of the switching module and transmitting data to the core control module for processing and analysis. The self-boosting module is used for providing a driving voltage for a switching tube in the switching module. The switching module is used for executing the on-off actions of a load. The high-efficiency intelligent high-side electronic load switch is wide in operating voltage range, high in operating frequency, high in efficiency, low in loss, safe, reliable and programmable.

The invention discloses a high-gain isolated-type active clamping soft-switched DC-DC convertor, and belongs to the technical field of convertors. The convertor comprises a current multiplication loop, a transformer and a switched capacitance loop; the current multiplication loop comprises a voltage source Vin, two input inductors L1 and L2, a clamping capacitor Cc, two main power switch tubes S2 and S4, two auxiliary power switch tubes S1 and S3, external capacitors CS1, CS2, CS3 and CS4 of the four power switch tubes S1-S4, and a transformer primary coil shunt inductor L; the switched capacitance loop comprises four rectifier diodes which include D1, D2, D3 and D4, one resonance inductor Llk, two resonant capacitors C11 and C12, two output capacitors C21 and C22, and a load resistor R. The high-gain isolated-type active clamping soft-switched DC-DC convertor has the advantages of having high gain, being small in ripple of input current, small in ripple of output voltage, low in cost, and high in efficiency, and can be applied to occasions of conversion from direct current to direct current in low-voltage and large-current systems like a photovoltaic power generation system and a fuel-cell power generation system.

The invention relates to a simulative switch circuit structure. The simulative switch circuit structure comprises a phase inverter circuit module, a passage geminate transistor circuit module and a breaking point protection circuit module, wherein an input end of the phase inverter circuit module is connected with a control signal input terminal (CRT), the passage geminate transistor circuit module is connected between a signal input end (IN) and a signal output end (OUT), the passage geminate transistor circuit module comprises a third P-channel Metal Oxide Semiconductor (PMOS) field effect tube (P3), an output end of the phase inverter circuit module is connected with a grid electrode of the third PMOS field effect tube (P3), and a substrate of the third PMOS field effect tube (P3) is connected with a power source (VDD) or the signal input end (IN) through the breaking point protection circuit module. According to the simulative switch circuit structure, the phenomenon that an input signal leaks power to the VDD through a parasitic diode which is arranged between a field effect tube source electrode and the substrate is avoided, normal turn-off of the simulative switch in a power source power off condition is achieved, the linkage current from the input end to the power source is avoided, and the simulative switch circuit structure is simple in structure, practical, stable and reliable in working performance, and wide in application range.

The invention discloses an energy-saving soft start street lamp control system, which comprises an alternating current power supply, at least one lighting lamp, a phototriode, a first load control module and a first soft start module, wherein the at least one lighting lamp is connected to an alternating current circuit in parallel; a collector electrode of the phototriode is connected with a live wire input end of the alternating current power supply through a current-limiting resistor, and an emitter electrode of the phototriode is grounded; a diode is arranged on a live wire between the phototriode and the lighting lamp; an active load series end and a driven load series end of the first load control module and a zero wire connecting end of the alternating current power supply are respectively connected with the lighting lamp, a live wire and a zero wire; the first soft start module is connected between the driven load series end of the first load control module and the live wire of the alternating current power supply; the first soft start module comprises a contactor and a time delay part which can be used for controlling the contactor to closed in a time-delaying way; and normally open contacts of the contactor are connected to two ends of the diode in parallel. According to the invention, energy saving and soft start of the street lamps can be realized by arrangement of the phototriode and state matching between the diode and the normally open contacts of the contactor.

The invention relates to an energy-saving intelligent socket, which comprises a rectifier filter, a single chip microcomputer, a display, a timer setting key, a transistor drive, a fuse, a relay, a current sensor, a standby current setting key, and a wireless remote controller. A timer module, a wireless remote control module and a standby loss prevention module can be formed, regular on and off can be realized, zero standby power consumption of a domestic appliance can be realized, random remote control cutoff of the domestic appliance can be realized, and multiple functions of realizing on of an emergency power supply, having an ultraviolet money detection function, and realizing overload protection and electric leakage prevention can be realized.

The invention discloses a resonance boost DC/DC converter and a control method thereof suitable for high-voltage and high-power occasions. The converter is connected with a direct-current input power source and a load and comprises two primary-side diodes, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a resonance unit, a first rectifier diode, a second rectifier diode and two filter capacitors. The resonance boost DC/DC converter is characterized in that the resonance unit is connected with a bridge arm composed of the four switching tubes and a rectifier unit composed of the two rectifier diodes and the two filter capacitors. According to the resonance boost DC/DC converter and the control method thereof, approximate zero voltage switching-off of the switching tubes and zero current switching-off of the rectifier diodes can be achieved, losses can be greatly reduced, and meanwhile the voltage stress of all switching devices is not larger than one second of the output voltage. A resonance circuit can be used for the high-power boost occasions.

The present invention provides a single-segment linear constant-power LED (light-emitting diode) driving circuit and a method. The circuit includes a voltage input module, an LED load, a power switching tube, a sampling resistor, an overvoltage control module which is used for detecting the drain-end voltage of the power switching tube, a current control module which is used for limiting the peak current of the LED load, and a comparison module. According to the single-segment linear constant-power LED (light-emitting diode) driving circuit and the method, when input voltage is larger than the conduction voltage of the LED load, the current control module limits the peak current, so that a current average value in different input voltage periods can be constant; when the input voltage is larger than a set value, current flowing through the LED load is turned off, and therefore, power consumption can be decreased; and when the input voltage is smaller than the conduction voltage of the LED load, the LED load is turned off. According to the single-segment linear constant-power LED (light-emitting diode) driving circuit and the method of the invention, the control of average current in alternating current periods is realized by using a compensation capacitor, the peak current is limited, and therefore, constant power output in a wide input voltage range is realized; and the turn-off voltage and turn-off slope of the LED are adjusted through an external resistor, and therefore, the high efficiency of the system can be realized, and the electromagnetic interference performance of the system can be optimized.

The invention discloses a photovoltaic terminal box and a photovoltaic system. The photovoltaic terminal box comprises a main terminal box and at least one auxiliary terminal box, which are corresponding to the same photovoltaic component. The photovoltaic component comprises at least two battery piece sub-strings, the output ends of which are serially connected together. The main terminal box is corresponding to one battery piece sub-string, and every auxiliary terminal box is corresponding to one battery piece sub-string. The two input ends of the main terminal box are connected with the positive pole and the negative pole of the battery piece sub-string, and the two input ends of every auxiliary terminal box are connected with the positive pole and the negative pole of the battery piece sub-string. The main terminal box comprises an open circuit switch, and one auxiliary terminal box comprises a short circuit switch, and other auxiliary terminal boxes comprise short circuit switches or open circuit switches. The open circuit switches are serially connected with the output ends of the corresponding battery piece sub-strings. The short circuit switches are parallely connected with the output ends of the corresponding battery piece sub-strings. The main terminal box is used to control the connecting of the short circuit switches and the disconnecting of the open circuit switches, when a turn-off instruction is received. The photovoltaic component is protected, and production technology is simple, and costs are low.

The invention discloses a circuit capable of reducing current conversion valve commutation failure. Diodes are connected in parallel reversely at the positions of bridge arm thyristors of a current conversion valve, and the diodes are reversely connected in parallel between the thyristors which are connected in series. According to the circuit, the diodes are connected in parallel reversely at the positions of the bridge arm thyristors, and parts of the thyristors are quick thyristors, and reverse voltages borne by a bridge arm and needing to be shut off are concentrated to parts of the thyristors (preferably the quick thyristors) in the commutation process. Firstly, parts of the thyristors are shut off, so that the whole bridge arm is shut off. After the bridge arm is shut off, the rest of the thyristors has enough shut off time and can be shut off smoothly. Therefore, quick shut-off of the bridge arm is realized, the total voltages, time and area needed by bridge arm shut-off are reduced, quick commutation of the current conversion valve is realized, and commutation failure is reduced. Current conversion valve commutation failure is one of the most common types of failure in high-voltage direct current transmission, and the fact that commutation failure is effectively reduced has important significance to stable and normal operation of a power system.

The invention relates to a bidirectional PFC soft switch and a control method thereof, and belongs to the field of a circuit topology. The bidirectional PFC soft switch and the control method thereof,which are used for improving the integral efficiency of a converter, are provided. The bidirectional PFC soft switch comprises a main loop and an auxiliary branch, wherein the main loop comprises a first switch tube S1, a second switch tube S2, a first resonant capacitor C1, a second resonant capacitor C2, an inductor L, a first filtering capacitor Co1 and a second filtering capacitor Co2, the auxiliary branch comprises a third switch tube S3, a fourth switch tube S4, a resonant inductor Lr, a transformer T and a full-bridge rectification bridge, the main loop is a bidirectional half-bridge PFC converter, soft switching of the main loop under a boost mode or a buck mode is assisted to be completed by the auxiliary branch, and soft switching of a switch tube of the auxiliary branch is alsoachieved.

The invention discloses an impedance conversion SPDT microwave switch, comprising an impedance conversion circuit, a current limiting bias circuit and a logic control circuit. Characterized in that: The impedance conversion circuit includes a first series branch disposed between the common port and the first radio frequency port, a second series branch disposed between the common port and the second radio frequency port, a first parallel branch disposed between the first radio frequency port and ground, and a second parallel branch disposed between the second radio frequency port and ground. First, the second series branch consists of a quarter wavelength microstrip line. The first parallel branch consists of a first switching diode and a first capacitor. The positive electrode of the first switching diode is connected to the first radio frequency port, and the negative electrode is grounded through the first capacitor. The second shunt branch consists of a second switching diode and asecond capacitor, the positive electrode of the second switching diode is connected to the second radio frequency port, and the negative electrode of the second switching diode is grounded through the second capacitor. The invention can be widely applied to various communication systems.

The invention relates to the technical field of valves, in particular to a control method of a safety valve. The pressure of a pressure pipeline is detected through a pressure sensor; and when the pressure of the pressure pipeline is excessive, a wireless communication device I transmits a signal to a wireless communication device II, an air cylinder downwards pushes a movable plate, and a valve rod under the movable plate drives a gate to move downwards so as to close a valve and cut off medium conveyance. When the valve cannot be closed due to fault occurred on the air cylinder, the valve isclosed through an emergency shutoff device. A control method of the emergency shutoff device is characterized in that the end part of a handle is pressed, the handle downwards pushes a vertical rod,the vertical rod drives a connecting rod to move downwards, and the connecting rod drives the movable plate to move downwards, so that the valve is closed. When the pressure pipeline returns to normal, and the valve needs to be opened, the pressing on the handle is released, the vertical rod returns back in position under an elastic action of a spring II, the movable plate returns back in positionunder an elastic action of a spring I, and the gate is lifted upwards, so that the valve is opened.

The invention relates to an outdoor permanent magnetic intelligent vacuum breaker. A zero sequence current transformer, a phase current transformer, a line voltage transformer, a filtering circuit, a power supply management circuit, a charging unit, a capacitive circuit, a photoelectric isolation circuit, a photocoupling isolation circuit, a storage unit, a watchdog circuit, a system unit circuit, a clock circuit, transistor-transistor logic (TTL) communication, a fault state alarm, a data line of an input keyboard, a liquid crystal display (LCD) and a light-emitting diode (LED) display are respectively connected onto a single-chip microcomputer. General packet radio service (GPRS) communication is connected with the TTL communication. The capacitive circuit and the photocoupling isolation circuit are connected with a driving and counter emf absorbing unit and a circuit of a permanent magnetic driver. A permanent magnetic driving circuit is provided with an in-place detecting circuit and an in-place indicator. A communication circuit is connected with the photocoupling isolation circuit, and a remote controller circuit below a column is further connected with the photocoupling isolation circuit. The outdoor permanent magnetic intelligent vacuum breaker has the advantages of being simple to operate and safe and reliable and is suitable for being used for outdoor vacuum breaker remote control operation.

The invention discloses an implementing method of protecting an IEGT (injection enhanced gate transistor) based on a relay protection tripping signal, belonging to the field of control. The implementing method comprises the steps of: introducing a 'tripping' control signal of a breaker into logic trigger conditions of a blocking IEGT triggering pulse module to form a mode of new logic trigger conditions of the blocking IEGT triggering pulse module together with original logic trigger conditions, outputting a 'blocking IEGT triggering pulse' signal through the blocking IEGT triggering pulse module after a microcomputer protection device outputs the 'tripping' control signal, before the 'tripping' mechanical action of the breaker, shielding/blocking the triggering pulse of the IEGT in a frequency convertor so as to turn off the IEGT and avoid the impact on the IEGT caused by a di/dt current mutation value impact, and to protect the IEGT. The protection action mechanism of the implementing method is cleverly set and easily achieved, and according to the protection action mechanism, the needed time of an on-site repair process is shortened greatly, the production can be resumed quickly and the production/maintenance cost can be lowered. The implementing method can be widely applied to the control/protection field of the driving system of a rolling mill set.

A high-frequency and high-voltage pulse generator for sterilization relates to a pulse generator. A control circuit and a pulse generating circuit are provided; the control circuit is provided with a voltage comparator, a triode, a first NAND gate, a second NAND gate, a coupler, and a relay; the pulse generating circuit is provided with a relay normally open switch, MOSFET switching tube, first transformer, second transformer, diode, capacitor, spark arrestor. Based on the traditional high-frequency pulse device, a timer based on NE555 is designed, and DSP is used to digitally process the sterilization signal, so that the interference of the sterilization circuit is greatly reduced. Capacitor charging and discharging is used to obtain high-voltage pulses, so that the output pulse can reach 12-100kV/cm, and the width is controlled at the microsecond level, and the pulse front is controlled at the nanosecond level, which can effectively sterilize and will not change the food composition. ; It can be turned on and off in an instant and has a large flow capacity and reliable operation.

The invention discloses a multiplexed output circuit which comprises a first switch, a start-up unit, a self-locking unit, a shutdown signal buffer cell and a shifting unit. The first switch is connected with the start-up unit, and then is spanned on the input end and the output end of the self-locking unit. The input of the self-locking is coupled with an electric power source while the output is coupled with a power supplying end of the shifting unit. One end of the shutdown signal buffer cell is coupled with a shutdown signal output end of the shifting unit while the other end is coupled with electrical power source. The conical point between the first switch and the start-up unit is coupled to a clock input end of the shifting unit. After the shifting unit receives a pulse every time at a clock output end of the shifting unit, the actual output of the shifting unit shifts one bit backwards. The circuit can realize one touch key and multiplexed output. Not only the switch of a function tap position is realized but also the thorough shutoff and open of the electric power source is realized. In addition, the one touch key causes that the appearance of products are more beautiful and the use is more convenient.

The invention provides a wireless charging positioning auxiliary detection system. The wireless charging positioning auxiliary detection system comprises a transverse correcting unit, wherein the transverse correcting unit comprises a left detection coil, a right detection coil, a first voltage sensor, a second voltage sensor, a threshold voltage source, a first voltage comparator, a second voltage comparator and a DSP microprocessor, the voltage signal of the right detection coil is collected through the first voltage sensor, then is transmitted to one input end of the first voltage comparator through a filter unit, the other input end of the first voltage comparator is connected with a threshold voltage source, and the output end of the first voltage comparator is connected with the DSPmicroprocessor through a signal conversion unit. According to the wireless charging positioning auxiliary detection system, the voltage values of the left detection coil and the right detection coil which are installed at the bottom of a vehicle are collected and compared with the threshold voltage to obtain a difference value, and then the difference value is converted into position information to realize transverse position correction.

The invention belongs to the field of cable processing and particularly discloses a copper wire drawing machine for a cable. The copper wire drawing machine comprises a machine frame; a paying-off tube is rotationally connected with the machine frame, a wire drawing unit is arranged above the paying-off tube on the machine frame, a traction unit is also arranged on the machine frame, a tensioningunit, a heating unit and a driving unit are also arranged on the machine frame, and the driving unit comprises a first rotating shaft rotationally connected with the machine frame and further comprises a second rotating shaft fixed at the top end of the paying-off tube, a third rotating shaft is rotationally connected between the first rotating shaft and the second rotating shaft on the machine frame, and a first motor for driving the third rotating shaft to rotate is also arranged on the machine frame; the tensioning unit comprises a tensioning rod hinged to the first rotating shaft and alsocomprises a first piston barrel fixedly connected with the first rotating shaft; the heating unit comprises a fourth rotating shaft rotationally connected with the machine frame and further comprisesa second piston barrel fixed on the machine frame. With the adoption of the invention, the problem that the machine cannot be timely turned off when the copper wire is broken is solved.