36results about How to "Adjustable current" patented technology

The invention relates to an intelligent performance analysis and testing bench for batteries of motorized automobiles, which allows the studying and analysis on the charging and discharging characteristics of various batteries in a lab, so as to reduce the studying cost, shorten the studying time, simplify the studying procedures and improve the analysis accuracy. The invention comprises a main system interface module comprising a hi-voltage charging parameter setting module and a hi-voltage charging display module. The hi-voltage charging comprises hi-voltage programmed charging and hi-voltage constant-current charging. The main system interface module additionally comprises a low-voltage charging parameter setting module and a low-voltage charging display module. The low-voltage charging comprises low-voltage programmed charging and low-voltage constant-current charging. The main system interface module additionally comprises a discharging parameter setting module and a discharging display module. The charging comprises programmed discharging and constant-current discharging.

The invention provides a composite slit leading dual-band and double-fed microstrip antenna with low elevation and high gain, and relates to a microstrip antenna. The microstrip antenna is provided with an upper substrate and a lower substrate, wherein an upper patch is arranged on the upper surface of the upper substrate and provided with a main upper microstrip patch which adopts an angularly symmetrical square chamfer structure; four symmetrical leading gaps are formed in the main upper microstrip patch, and four symmetrical slit leading vibrators are arranged on the outermost periphery of the main upper microstrip patch; an interlayer patch having the same structure with the upper patch is arranged between the upper substrate and the lower substrate and provided with a main interlayer microstrip patch which adopts the angularly symmetrical square chamfer structure; four symmetrical leading gaps are formed in the main interlayer microstrip patch, space is reserved between the four symmetrical leading gaps and the edges of the main interlayer microstrip patch, and four symmetrical rodlike leading vibrators are arranged on the periphery of the main interlayer microstrip patch; and a lower patch is arranged on the lower surface of the lower substrate, and a main lower microstrip patch is arranged on the lower patch.

The invention discloses a high frequency and high precision ultrasound physiotherapy generator. The generator comprises a single chip microcomputer module, a DDS signal generating module, a power amplifying module, an impedance matching module, a signal acquisition and control module and a circuit protection module. The DDS signal generating module, power amplification impedance matching module, and an ultrasonic transducer are connected sequentially; the ultrasonic transducer is connected with the signal acquisition and control module; the single chip microcomputer module is connected with the DDS signal generating module, the circuit protection module and the signal acquisition and control module respectively. According to the high frequency and high precision ultrasound therapy generator, the design of the circuit structure is exquisite and reasonable; according to the characteristics of the human physiotherapy, the high frequency ultrasonic vibration signals are adopted so that some pain positions of the human body can be recovered quickly; according to the safety of the human physiotherapy and other requirements, the drive circuit architecture generated by more than 1MHz high frequency signals is constructed reasonably, which can meet the work needs of different working conditions in the human physiotherapy dynamic process, the flexibility is high and scope of application is wide.

The invention relates to a drive control circuit which comprises an input power module connected with an input end, a PWM control module connected with the input power module, a perfusion circuit module connected with the output end of the PWM control module, a voltage fluctuation detection module connected with the input power module through an inductor L1 and a constant current source module connected with the voltage fluctuation detection module through a diode D4, wherein the constant current source module is connected with a load. Compared with the prior art, the drive control circuit has the advantages that an electrolysis capacitor is not included in the circuit, the circuit is simple in structure and can be conveniently integrated and miniaturized, and the service life of a power supply is long; the input power module has a reverse-connection-proof function, when the power supply is reversely connected, the circuit does not work, and safety and reliability of the circuit are effectively improved; output wide voltages and currents are adjustable, the adjustable interval is large, use flexibility is high, the application range is wide, and popularization is easy to achieve; the voltage fluctuation detection module can meet requirements for multiple functions and variety.

The invention discloses a secondary side control isolation dimming circuit built by an operational amplifier. The secondary side control isolation dimming circuit comprises a power input end, a high-power control circuit and a power output end which are sequentially connected, wherein a dimming signal conversion circuit and a secondary side control circuit are connected between the high-power control circuit and the power output end; the dimming signal conversion circuit and the secondary side control circuit perform signal transmission through a first optical coupler; and the high-power control circuit and the secondary side control circuit perform signal transmission through a second optical coupler. The secondary side control isolation dimming circuit realizes the dimming function of input and output isolation and dimming signal and output isolation.

This invention provides a ground wire ice melting device of an ultra-high voltage alternating current power transmission line. An ice melting rectifier transformer (1), a high voltage rectifier (2), a line induction suppressor (3) and an output mode switching knife switch (4) of the ground wire ice melting device are sequentially in series connection; an input terminal of a digital display system (5) is connected with an output terminal of a protection control system (6); an input terminal of the protection control system (6) is connected with an output terminal of the output mode switching knife switch (4); and a signal output terminal of the digital display system (5) is connected with a signal input terminal of the protection control system (6). The ground wire ice melting device of the ultra-high voltage alternating current power transmission line has the advantages of being capable of achieving ground wire ice melting of the 100 km ultra-high voltage power transmission line, enabling gears to be adjustable, being capable of adapting to direct current ice melting of various types of ground wires, being small in size, strong in operability, good in heat dissipation effect, low in operation cost and simple in maintenance and improving the capability to respond to freezing disasters of the ultra-high voltage power transmission line.

The invention provides a solar battery assembly comprising a light-transmission upper cover plate, a plurality of solar battery slices, an adhesive and a carrier, wherein the plurality of solar battery slices are positioned between the light-transmission upper cover plate and the carrier; the adhesive is filled between the light-transmission upper cover plate and the carrier; the plurality of solar battery slices are connected with each other in series, in parallel or in series and parallel; positive and negative extraction electrodes for extracting current are arranged on the solar battery slices, wherein the positive and negative extraction electrodes on the solar battery slices are connected to the carrier to be used as positive and negative electrode connection points, and the positive and negative electrode connection points on the carrier are electrically connected for realizing the series connection, parallel connection or mixed connection of the solar battery slices. The positive and negative extraction electrodes of the solar battery slices are directly connected to the carrier so that the solar battery assembly has simple process and firm connection. The solar battery assembly can be repaired, and the voltage of a battery is adjustable.

The present invention discloses a wire cable breakpoint position detection method. The method comprises: providing high-voltage alternating current; accessing the high-voltage alternating current to a wire cable to be detected; and observing the whole wire cable to be detected in the infrared ray imaging, wherein the position of the obvious bright spot discovered in the infrared ray imaging is a breakpoint position. The wire cable breakpoint position detection method can accurately find the position of the wire cable breakpoint.

The invention belongs to the field of intelligent energy storage devices, in particular to a stretchable zinc air battery array and a preparation method thereof. The preparation method comprises the steps of: firstly, embedding a snakelike line copper wire circuit in a silicone rubber mold; secondly, binding a zinc foil piece and a modified carbon cloth to specific positions of the snakelike linecopper wire circuit to form an array and serve as a negative electrode and a positive electrode of a battery respectively; thirdly, separating the zinc foil piece and the modified carbon cloth by means of a polymer electrolyte film; and finally sealing edges to obtain the stretchable zinc air battery array. The stretchable zinc air battery array is rechargeable, has good bendability and stretchability, and stably discharges during the dynamic stretching and bending process. The battery array can be sewn on clothes, and thus has a good application prospect in the field of wearable equipment.

The invention relates to a charger for an electric vehicle, belonging to a charger and comprises a charger body, a charging wire and a plug arranged on the charger body and connected with a power supply, wherein the charger body is internally provided with a winding transformer, a plurality of taps are extracted from the winding transformer, each tap is conducted with a circuit by the rotation of a knob arranged on a shell of the charger body, and the charger body is internally provided with an adjustable resistor and a resistor knob is arranged on the shell of the charger shell for realizing transformation of output current; and a plug hole is arranged on the charger body, the plug hole is matched with a charger plug hole at one end of the charging wire, and the other end of the charging wire is connected with a storage battery. The invention has the advantages that: a universal charger brings great convenience for the production and the management of a manufacturer, the manufacturer only needs to produce the same mould shell to be assembled with electronic components, and simultaneously produce various types of charging wires; and the voltage and the current are adjustable, therefore, the use range is enlarged.

The invention relates to a system for conducting human body neural stimulation based on forearms, finger ends and acupuncture. The system comprises a plurality of acupuncture physiotherapy needles, apower supply which is electrically connected with the acupuncture physiotherapy needles, a controller which is electrically connected with the power supply, an embedded micro processor, a heat devicewhich is electrically connected with the power supply, is in communication connection with the controller and is electrically connected with the acupuncture physiotherapy needles, a voltage control unit which is arranged on a human body neural conduction wire, and a temperature control unit arranged on a heating wire, wherein the power supply is electrically connected with the acupuncture physiotherapy needles through the voltage control unit, the voltage control unit is in communication connection with the controller, the heating device is electrically connected with the acupuncture physiotherapy needles through the temperature control unit, and the temperature control unit is in communication connection with the controller. According to the system, component assembling matching of the system is reasonable, stimulation is not directly impacted the diseased positions of a patient, but corresponding nerve endings of nerves of the diseased positions of the patient are stimulated, currentand temperature are adjustable, and therefore treating means are mild and have no untoward effects.

The invention discloses a magnetically-controlled switch type wireless power supply block. The magnetically-controlled switch type wireless power supply block comprises a wireless base for connectinga power line and a wireless socket connected with the wireless base; the wireless base comprises a panel and a magnetically-controlled switch arranged on the panel, a radio emitting coil and an elastic conducting plate for connecting the power line; the wireless socket comprises a socket and a magnet arranged on the socket to connect with the magnetically-controlled switch, and a radio receiving coil connected with the radio emitting coil; the radio receiving coil is connected with the control circuit board, and the control circuit board is connected with a rheostat and jacks arranged on the socket. The magnetically-controlled switch type wireless power supply block disclosed by the invention is novel in design, simple in structure, convenient for use, safe and free; multiple wireless bases for connecting the power line are arranged in the same line, so that the wireless socket is conductive by utilizing the wireless socket to connect with the wireless base.

The invention discloses a high-voltage plasma discharge power supply device based on STM32 adjustable voltage, include the main circuit, Button and display circuit, A control circuit and a power supply circuit, the main circuit includes a rectifier bridge, Filter capacitor, inverter circuit, Hall voltage sensor, Hall current sensor and boost transformer, A control circuit includes a STM 32 minimumsystem, download circuit, serial communication circuit, An overcurrent protection circuit, a remote start-stop control circuit, a soft start control circuit, a SPI FLASH circuit, an overheat protection circuit, an undervoltage protection circuit, a PWM driving circuit, an ADC conversion circuit, a voltage-current conversion circuit and a frequency detection circuit, and a key and display circuitcomprise a key, an indicator light and an LCD display screen; The invention can improve the production efficiency, the processing quality and the production safety, meanwhile, the circuit of the invention adds a plurality of protective circuits to increase the reliability.

The invention provides an implementation method of a power electronic switch device for a BESS system, and the method comprises the following steps: S1, installing a power electronic switch device for monitoring the direct current change rate of a battery module in real time on each battery module of the BESS system during use; s2, a power electronic switch device is started, the power electronic switch device detects the direct current change rate dI/dt of the BESS energy storage unit in real time through a direct current sensor, and under the normal condition of the BESS energy storage unit, the direct current change rate dI/dt does not change; s3, when the BESS energy storage unit breaks down, the power electronic switch device detects the direct current change rate dI/dt and the direct current loop current I in real time; s4, whether the direct current change rate dI/dt and the direct current loop current I are both larger than a user set value or not is judged, and if yes, current cutting-off is conducted on the power electronic switch device; according to the invention, when the BESS energy storage system has a fault, the fault part can be effectively removed in real time, and the safety performance is ensured.

The invention proposes a circuit for actuating a lighting unit (120), comprising a current mirror (T1, T2) which can be biased by means of a reference voltage source (D1); comprising a hysteresis circuit (130) which is connected to the output of the current mirror (T1, T2); comprising a step-down converter (T3, D2, L1) with an electronic switch (T3), wherein the electronic switch (T3) is connected to the output of the hysteresis circuit (130); wherein the lighting unit (120) can be actuated by means of the step-down converter (T3). A method for operating the circuit and a luminaire having a circuit of this kind are also proposed.