53results about How to "Fast switching response" patented technology

The invention discloses a shared integral term PID dual-closed-loop controller for a PWM digital power supply. The dual-closed-loop controller comprises a dual-closed-loop PID control module, wherein the dual-closed-loop PID control module comprises an error module, a proportional term calculation module, a differential term calculation model, an integral term calculation module and an output module; the error module is used for measuring and calculating voltage error and current error in each sampling period, and transmitting the error to the proportional term calculation module, the differential term calculation model and the integral term calculation module separately; the proportional term calculation module is used for measuring and calculating the voltage loop proportional term and the current loop proportional term of the sampling period; the differential term calculation model is used for measuring and calculating the voltage loop differential term and the current loop differential term of the sampling period; the integral term calculation module is used for performing assignment on the shared integral term integral factor according to the size of the voltage loop proportional term and the current loop proportional term of the sampling period, and calculating the value of the shared integral term according to the integral factor; the adjustment amount of the measured and calculated voltage loop or current loop is output by the output module; and a DC/DC power supply is controlled through PWM. By virtue of the shared integral term PID dual-closed-loop controller, an overshoot phenomenon of the PWM digital switch power supply can be effectively avoided, and high dynamic characteristic and high frequency bandwidth are achieved.

A lossless equalization controller and a control method belong to the technical field of battery equalization control. The controller comprises a battery pack formed by a plurality of cells, an equalization switch control module, an equalization power control module, an equalization power transformation module, an equalization charging control module, a system power supply module and a master control module, wherein the system power supply module supplies power to the equalization switch control module, the equalization charging control module and the master control module. The controller has the advantages of rapid equalization speed, safe and reliable equalization process, low cost and easy promotion and application. The control method includes detecting battery equalization degree, equalizing laggard cells in the battery pack when the battery equalization degree is equal to or greater than 0.3%, detecting system fault, clearing system fault and other detection steps. The equalization precision is high, and the equalization process is safe and reliable.

The present invention relates to a modular photoelectric-switch keyboard key, including modular photoelectric switch, base, keymodule and elastic element, the said modular photoelectric switch is mounted in the said base, the said keymodule is slideably placed in the sliding cavity of the said base and the said elastic element is placed between the said base and the said keymodule; the said modular photoelectric switch comprises transmitting tube, receiving tube and distance piece, the said transmitting tube and the said receiving tube are placed oppositely and are electrically connected with the circuit board; the said distance piece is connected with the said keymodule and located between the said transmitting tube and the said receiving tube.

The invention discloses a multifunctional changeover valve. The multifunctional changeover valve comprises an automatic ball-point pen type pressing mechanism, a sealing guide rod, a first spring and a valve element body, wherein the automatic ball-point pen type pressing mechanism is triggered, and the first spring applies return force opposite to pressing force to the sealing guide rod, so that the sealing guide rod abuts against the pressing mechanism all the time; the pressing mechanism has high stroke and low stroke, so that the sealing guide rod performs up and down reciprocating motion along the axial position of the valve element body, and therefore, the first flow-guide hole or a second flow-guide hole is selectively plugged by a plug on the sealing guide rod, and a water inlet and a first water outlet or a second water outlet are opened/closed; and an included angle between the valve element body and a valve element seat body is rotated, so that an over-flow area of a flow regulating hole is changed, and therefore, the flow switching purpose is realized.

The invention belongs to the field of switching power supplies, and relates to a power failure holding circuit and a control method. The power failure holding circuit comprises a controller, a switch, a filter capacitor, an energy storage capacitor and a bidirectional direct-current converter, and the bidirectional direct-current converter comprises an inductor, a switching tube S1, a switching tube S2, a diode D1 and a diode D2; the bidirectional direct-current converter is controlled by the controller to enable the power-down holding circuit to work in a boost mode, a buck mode or a free discharge mode. In a boost mode, the inductor, the switching tube S1 and the diode D2 form a boost circuit; in a buck mode, the inductor, the switching tube S2 and the diode D1 form a step-down circuit, and the switching tube S2 works in an on-off state; in the free discharge mode, the switching tube S2 is controlled to be in a normally-on state, and the energy storage capacitor directly supplies power to the output voltage. The boost and buck modes are controlled by independent switching tubes, the switching response speed of the boost and buck modes is high, and the problems of narrow application range, complex control and slow mode switching dynamic response in the prior art can be effectively solved.

The invention discloses a dual-disc clutch hybrid power assembly suitable for new energy vehicles, in which an engine, an elastic damping connector, a first motor, a double-disc clutch and a second motor are sequentially connected through coaxial; the second motor outputs The shaft is connected to the drive axle assembly; the energy storage power supply is electrically connected to the first motor controller, the second motor controller, and the vehicle controller; the first motor controller is electrically connected to the vehicle controller and the first motor connection; the second motor controller is electrically connected with the vehicle controller and the second motor respectively. The double-disc clutch of the present invention has no axial force generation for the motor and the engine, and has the functions of a clutch, a two-speed gearbox, impact overload protection, forward and reverse separation, non-powered intermittent speed difference shifting, and the like. It has quick switching response, high reliability, low energy consumption, and high efficiency; the energy output can be switched between the engine and the energy storage power supply according to the working conditions, and recycling can be realized, and the energy management matching is more reasonable.

The invention discloses a controllable automobile clutch based on magnetorheology. The controllable automobile clutch comprises a driven plate, a pressure plate, a transmission input shaft, a diaphragm spring connected with the pressure plate and a pushing device for pushing the diaphragm spring; the driven disk is in transmission connection with the transmission input shaft through a magnetorheological damper; the magnetorheological damper comprises a sleeve, a rotating shaft, a coil drum I and a coil drum II; the pushing device comprises a driving motor and a transmission mechanism for transmitting driving force of the driving motor to a diaphragm spring, a motor switch of the driving motor is arranged on the coil drum 1 and the coil drum II, and when the coil drum II moves towards the coil drum I to a set value, the motor switch is started. The controllable automobile clutch can adjust the magnitude of the magnetic field by changing the magnitude of the current, damping parameters are changed, the vibration damping control is achieved, and the control fatigue of a driver can be reduced.

The invention discloses a three-terminal full-control-type switch element based on a resistance-variation material. The element comprises three connection terminals and a resistance-variation film, wherein the three connection terminals comprise a positive pole, a negative pole and a gate pole; the positive pole and the negative pole are located on the same plane; the gate pole and the positive pole/negative pole are located on the different planes and are isolated by the resistance-variation film; the variation of the resistance between the positive pole and the negative pole is achieved under the excitation of a gate pole control terminal voltage, thus excellent switch characteristics are exhibited, and the switching ratio of the switch element reaches 6 magnitude orders; and the switchelement has a memory characteristic, and the switching state of the switch element is still maintained after the excitation of the gate pole control terminal voltage is removed. The electronic switchelement has the advantages of simple structure, low manufacturing cost, rapid response speed (nanosecond order) and large switching ratio, has the memory characteristics and can be used as a basic composition element of devices such as a logic gate circuit, an analog multi-path switch, a memory, a thin film transistor and the like. The invention also discloses a preparation method of the three-terminal full-control-type switch element based on the resistance-variation material.

A switching apparatus has a switch and a control signal generator. The control signal generator is configured to generate a control signal applied to the switch to control the operations of turning on and off of the switch. The control signal generator has an inverter and a regulating circuit. The input end of the inverter receives an input signal, and the output end of the inverter outputs the control signal. The regulating circuit has a switching unit and a capacitor. A first end of the switching unit is coupled to the output end of the inverter, a second end of the switching unit is coupled to a first system voltage, a third end of the switching unit is coupled to a first end of the capacitor, and a second end of the capacitor is coupled to a second system voltage.

The invention relates to the field of electronics, and discloses a switching control method and control circuit and a switching power supply with the control circuit. The method comprises the steps that a driving current signal is generated according to a sampling voltage signal, the waveform of the driving current signal is made to follow the waveform of the sampling voltage signal, the sampling voltage signal comprises collector current information of a triode as a switching power supply power switch, and when a pulse width modulating signal is at a first level, the driving current signal is input into the base electrode of the triode, and the triode is in a saturation conduction state; when the pulse width modulation signal is at any preset time frame of a second level, the electric charge of the base electrode of the triode is released, and the triode is in a cut-off state. According to the technical scheme, the switching speed of the triode can be improved conveniently.

The invention belongs to the technical field of electronic instruments, and particularly relates to a high-frequency and high-voltage circuit, which can be applied to a mass spectrometer. The circuit comprises control circuits 1, 2 and 3, an isolation circuit 4, a switching circuit 5 and a filter circuit 6, wherein each control circuit is composed of a programmable logic device and a driving amplification circuit; the output end of the amplification circuit is connected with a primary circuit input pin of a differential mode coupled circuit, and a signal is isolated by the differential mode coupled circuit and then transmitted to a secondary circuit; the output pin of the differential mode coupled circuit is connected with the control electrode of a control switch, an external adjustable DC power supply is connected with the input end of the switching circuit via the filter circuit formed by a differential mode inductor and a capacitor, and the output end of the switching circuit is connected with a post-stage load; and under control of the control circuits, the switching circuit outputs a square wave signal with high voltage, the filter circuit filters the inputted DC voltage, and a good square wave signal can be acquired. In comparison with other traditional high-frequency and high-voltage circuits, the duty ratio is adjustable conveniently, a diode is parallelly connected between the drain and the source of an MOS transistor, and safety of the circuit is improved.

The present invention provides a vehicle lamp driving device and method, and a vehicle. The lamp driving device is used for a vehicle, the vehicle comprises a high beam module and a low beam module, the lamp driving device comprises a driving control module and a voltage regulating module, the driving control module sends a control signal to the voltage regulating module, the voltage regulating module sends a first voltage signal to the low beam module, controls the low beam module to be turned on, and sends a second voltage signal to the high beam module to control turning-on of the high beammodule. The splitting high beam module and low beam module are arranged to control independent light emitting respectively, compared to the prior art, a solenoid valve and a baffle in a traditional vehicle lamp are omitted to provide more spaces and creativity for the design of the whole lamp shape so as to simplify the design difficulty and reduce the cost of the whole lamp; and moreover, compared to the traditional mechanical control of high-low beam switching, the switching response speed is improved, and the high-low beam individuation demand is met.

A switching power circuit comprises a voltage conversion module suitable for converting a first voltage signal accessed by the voltage conversion module into a pulse alternating current signal and outputting the pulse alternating current signal, whereinthe voltage conversion module comprises a pulse width modulation control circuit used for controlling the frequency and/or duty ratio of the pulsealternating current signal and a transistor switching element; asecond rectifying and filtering circuit which is coupled with the voltage conversion module and is suitable for converting the pulse alternating current signal output by the voltage conversion module into a second voltage signal and outputting the second voltage signal; afeedback circuit which is suitable for accessing a second voltage signal output by the second rectifying and filtering circuit and outputting a feedback signal for indicating the output voltage of the second rectifying and filtering circuit to the voltage conversion module, wherein the voltage conversion module which is also suitable for adjusting the output voltage of the switching power supply circuit according to the feedback signal, so a flyback quasi-resonant circuit topological structure is formed, and the high frequency and miniaturization of the switching power supply are realized.

The invention discloses a modular photoelectric switch. The modular photoelectric switch comprises a base body, a transmitting tube, a receiving tube and a spacer; the base body is provided with two opposite transmitting tube mounting bases; a make-and-break groove is formed between the two opposite transmitting tube mounting bases; the transmitting tube and the receiving tube are respectively arranged in the two opposite transmitting tube mounting bases; the transmitting mouth of the transmitting tube and the receiving mouth of the receiving tube are in the face of the make-and-break groove and face each other; and the spacer is arranged in the make-and-break groove in a sliding manner, so that break-over or blockage of signal transmission between the transmitting mouth and the receiving mouth is realized. The modular photoelectric switch has the advantages of being fast in switch response speed, long in service life, waterproof and dustproof.

The invention discloses a signal emitter with adjustable intensity. One emitter or all the emitters can be selectively switched on through the rotation of a light shading plate with holes so as to change the signal intensity of the signal emitter with the adjustable intensity; if a breaker plate rotates by a large angle, the unusable emitter can be quickly changed without disassembling the whole signal emitter with the adjustable intensity.

The invention provides a groove type MOSFET device and a preparation method thereof. According to the groove type MOSFET device, the metal connecting part is arranged in the groove and located on the insulating layer, and the metal connecting part penetrates through the insulating layer at the bottom of the groove, a grid electrode and a gate oxide layer, so that an electric field protection part can be directly connected with the source electrode through the metal connecting part, namely, the electric field protection part is connected with the source electrode in a metal interconnection mode. The arrangement can greatly reduce the connection path, reduce the resistance, and finally improve the switching response of the device.

The invention discloses a method and a system capable of improving the switching response of a charging current. The method comprises the following steps: A, when a mobile terminal is charged, controlling the output voltage of a charger to be switched into a second charging voltage from a first charging voltage; B, detecting first time that the first charging voltage is switched into the second charging voltage; and C, comparing the first time with preset second time for judgment, and determining whether the charging current is switched in advance or not according to a judged result; and when the first time is greater than or equal to the second time, switching the charging current in advance. The current is switched in advance when the time for switching the charging voltage is too long, so that the speed of responding the current switching of the mobile terminal is improved.