41results about How to "Reach the protective function" patented technology

The invention relates to a switch type power supplying device with output current limit. The knee voltage of feedback voltage is obtained by a voltage sample and a retaining controller, then a square root opening operation and an error operation are respectively carried out on the knee voltage, and the action of a power switch is controlled according to operation results to achieve double functions of voltage-stabilizing output and current limit.

Connected to primary side of a transformer, two electronic switches in use for control of turning on or off two switches convert DC power supply to AC power supply for a load to use. The signal generation circuit includes following parts: a logic unit of AND gate, a NAND gate, a circuit protection unit, a waveform generator, clock generator, soft starting up unit, a sample hold unit, first and second comparators etc. the invention is able to direct control and drive operation of diverter switch in semi bridge type circuit architecture.

The LED device includes following parts: a LED for converting electrical energy to electromagnetic wave; a set of lead wire frames in use for connecting LED to external electrical source; a group containing multiple Zener diodes, and at least one set being as back to back coupling or face to face coupling. Through gold wire or aluminum wire being connected to a lead wire frame, the set of Zener diode is connected to LED in parallel. Besides function of electrostatic protection, the invention can carry out test of reverse voltage in order to screen out products with potential problems. The invention also makes LED device possess overvoltage protection so as to be possible to maintain service life and quality in severe condition.

The invention discloses an initiatively cutting circuit disconnector and particularly relates to the disconnector applied to a power lithium cell power supply. The disconnector comprises a shell body, a temperature sensing mechanism, a heating mechanism and a bridge type contact mechanism, wherein the temperature sensing mechanism comprises a temperature sensing body, the heating mechanism comprises a heating component, the bridge type contact mechanism comprises a bridge type movable spring piece, at least one bridge type static spring piece, an insulating support and a first elastic element, the temperature sensing body is used as a supporting component at one end of the insulating support and is controlled by the heating component, the bridge type movable spring piece is installed on the insulating support, touch point contact is formed between one face, directing towards the other end of the insulting support correspondingly, of the bridge type movable spring piece and the bridge type static spring piece, the bridge type movable spring piece, the bridge type static spring piece and a lithium cell or a lithium cell pack are connected in series and form a lithium cell major loop, and the first elastic element is arranged between the other end of the insulating support and the inner wall of the shell body in an expanding and leaning mode. The disconnector is matched with a cell managing system, the lithium cell major loop is cut when overvoltage or overcharge or overdischarge occurs in the lithium cell, hidden dangers such as fire or explosion of the lithium cell is eliminated under an abnormal condition, and the disconnector has the advantages of being fast in action, small in occupied area, convenient to install and use and the like.

The invention discloses a short-circuit protection and control circuit for an LED (Lighnt emitting Diode) strip lamp. The short-circuit protection and control circuit for the LED strip lamp comprises an LED constant current sampling and control circuit, a switching circuit and an LED short-circuit protection circuit, wherein the switching circuit and the LED constant current sampling and control circuit are respectively connected into an LED strip lamp power supply loop, a control end of the switching circuit is connected with a backlight control signal, and the LED short-circuit protection circuit is connected between the LED constant current sampling and control circuit and the control end of the switching circuit. The LED short-circuit protection circuit comprises a comparator, wherein an in-phase input end of the comparator is connected with a preset threshold signal, and control signals are output to the switching circuit by the LED short-circuit protection circuit so as to control the power supply. After the structure is adopted, the short-circuit protection and control circuit disclosed by the invention has the characteristics of simple structure, timely response and low production cost. According to different parameters of strip lamps, the constant current control circuit can be adjusted, and a reference voltage of a protection point can flexibly set, and therefore, a normal, reliable and stable operation of a product can be ensured.

The invention relates to a motor control system, in particular to a DC brushless motor starting protection method and circuit. The technical problem that most of existing DC brushless motor starting circuits start motors directly and logic errors can be caused by poor operation of devices due to an excessive starting current is solved. The DC brushless motor starting protection method comprises the following steps: (1) setting a short-circuit protection current limit value A and an overload protection current limit value B; (2) setting a board-level temperature limit value C; (3) starting a motor; (4) measuring a current value on a power supply trunk line of the DC brushless motor; (5) collecting a current signal, and judging whether the value of the current signal reaches the short-circuit protection current limit value A or not; (6) judging whether the value of the current signal reaches the overload protection current limit value B or not, and (7) collecting a board-level temperature value and judging whether the temperature value reaches the board-level temperature limit value C or not. The invention further provides a DC brushless motor starting protection circuit.

The invention discloses a welding tool with a protection function. The welding tool with the protection function comprises a welding tool body, wherein the welding tool body comprises a welding workbench; the top of the welding workbench is fixedly connected to a working platform; the top of the working platform is fixedly connected to two fixing plates; two clamping plates are arranged on the tops of the fixing plates; and control slots are formed between the fixing plates and the clamping plates. The welding tool with the protection function has the beneficial effects that the welding workbench facilitates the welding operation of operators on the workbench and the welding operation process of workers; a protective baffle plate can block sparks generated during working of a welding rod very well, prevents the sparks from sputtering onto bodies of the operators, has a protection effect, improves the safety of the workers during working and achieves the advantage of the production function, thereby effectively solving the problem that the traditional welding tool has a relatively poor protection effect and easily causes unexpected accidents.

The invention discloses laser cutting equipment for decoration plates, and relates to the technical field of cutting devices. The laser cutting equipment comprises a machining table, a cutting device, a control table and supporting columns, protection blocks are fixedly installed on the two sides of the machining table, the cutting device is movably installed on the top of the machining table, and the control table is fixedly installed on the side face of the machining table; and the supporting columns are fixedly mounted at the bottom of the machining table, a cleaning device is fixedly mounted in the cutting device, and a grinding device is fixedly mounted on the side face of the cleaning device. Through the principle that same magnetic forces of a transmission magnetic block and a rotating magnetic block repel each other, the movable transmission magnetic block moves up and down, so that the magnetic force drives the transmission magnetic block to move, then the transmission magnetic block drives a rotating block to rotate so as to drive a grinding block to rotate, and then a mounting block drives a grinding convex block to grind a cutting part; and therefore, the device can conveniently grind a product, and the product quality can be improved.

The invention discloses a medical clinical detection and analysis device with protection function, which comprises a detection and analysis device body, a shell is arranged outside the detection and analysis device body, the detection and analysis device body includes a first instrument cabinet, and the bottom of the first instrument cabinet The second instrument cabinet is fixedly connected to the bottom of the second instrument cabinet, and the bottom of the second instrument cabinet is fixedly connected to a medical supplies storage cabinet. The front of the first instrument cabinet is fixedly installed with a telescopic door, and the front of the telescopic door is fixedly connected to a door handle. There is a first instrument room inside. The present invention protects the detection instrument by arranging the first instrument cabinet and the second instrument cabinet, prevents the instrument from being damaged when the instrument is not in use, improves the protection effect on the detection instrument, and improves the detection efficiency by protecting the instrument. The service life of the instrument achieves the advantages of the protection function, thereby effectively solving the problem that the existing detection and analysis devices are easily damaged and affect the treatment time of patients.

A high-performance automobile hood transferring gripper structure comprises a bearing frame, a first clamping unit, a first positioning unit, a second clamping unit, a first supporting unit, a third clamping unit, a second positioning unit, a fourth clamping unit, a third positioning unit, a second supporting unit and a fifth clamping unit; and all the units are fixedly connected with the bearingframe through connection pieces. According to the high-performance automobile hood transferring gripper structure, the multiple units are subjected to modularized combining, and each unit is compact in structure, comprehensive in function and high in structural strength; for the clamping positions of a compact space, the clamping and positioning functions of all the units are subjected to integrated treatment, so that a gripper mechanism has the higher functionality; and the units of the gripper mechanism is subjected to angle adjusting, and the gripper structure is suitable for the positioning clamping functions of workpieces different in type and is high in applicability.

The invention introduces an emulator and method supporting NVM soft breakpoint debugging, and relates to the technical field of chip emulation. The emulator includes an emulator debugging module and emulator hardware. The emulator hardware mainly includes modules such as a chip function debugging module, a CPU, a chip MMU, a chip NVM, a chip RAM, and a debugging RAM. The emulator debugging module writes the erasing program and breakpoint data into the erasing program RAM and breakpoint storage RAM of the debugging RAM respectively, and backs up the code of the chip NVM breakpoint address to the breakpoint storage RAM according to the breakpoint data, and controls The CPU executes the erasing program to write the code of the NVM breakpoint address as a breakpoint instruction to realize the breakpoint setting function; change the chip NVM breakpoint instruction back to the breakpoint storage RAM backup code to realize the breakpoint clearing function.

The present invention discloses an electrostatic fume purification drive power source. The electrostatic fume purification drive power source comprises a power circuit, a CPU control circuit, a drivecircuit, an output circuit and a signal detection circuit. The CPU control circuit is connected with the drive circuit and the signal detection circuit, the drive circuit is connected with the signaldetection circuit and the output circuit, the output circuit is connected with the signal detection circuit, and the power circuit is connected with the CPU control circuit and the drive circuit; andthe signal detection circuit comprises a signal detection chip, a 160th resistor, a 147th resistor, a 115th resistor, a 132th resistor, a 161th resistor, a 109th diode, a 108th diode, a 116th diode, a107th diode and a 102th transformer. The electrostatic fume purification drive power source can accurately reflect various abnormal conditions, can achieve various protection functions, can achieve automatic matching of the voltage and an electrostatic field and an automatic gear switching function to allow the electric field to work in an optimal state.

The invention discloses an infrared radiation (IR) green protection eyeglass, and particularly relates to a safety eyeglass with an IR protection infrared function. The eyeglass is prepared by mixing the following components in parts by weight: 100 parts of polycarbonate (PC), 116.2 parts of IR0001 color powder, 12.39 parts of 8950 color powder, 5.41 parts of purple B-color powder and 5.34 parts of 8315 color powder. A certain proportion of IR0001 color powder is added into the PC, and the color powder for filtering visible light is added, so that an IR protection function is realized; and the near infrared (780 to 1,400 nanometers) is less than 1.2 percent.

The invention provides a system and a method for automatically identifying a battery type of an electric car. The system comprises a key switch, a motor controller and a battery module with a battery management system, wherein the key switch is connected with an enabling end of the motor controller; the signal end of the motor controller is interconnected with the signal end of the battery management system; the anode and the cathode of the battery module are connected with an anode control end and a cathode control end of the motor controller respectively; the battery management system is used for transmitting total voltage of the battery module and a residual total power amount SOC to the motor controller; the motor controller is used for comparing the total voltage of the battery module and the residual total power amount SOC of the battery module with an inner preset value to obtain a battery module type and a working parameter corresponding to the battery type; the motor controller is used for controlling the switching-on / off of an anode output and / or a cathode output of the battery module according to the working parameter.

The present invention discloses an electrostatic fume purification drive power source. The electrostatic fume purification drive power source comprises a power circuit, a CPU control circuit, a drivecircuit, an output circuit and a signal detection circuit. The CPU control circuit is connected with the drive circuit and the signal detection circuit, the drive circuit is connected with the signaldetection circuit and the output circuit, the output circuit is connected with the signal detection circuit, and the power circuit is connected with the CPU control circuit and the drive circuit; andthe signal detection circuit comprises a signal detection chip, a 160th resistor, a 147th resistor, a 115th resistor, a 132th resistor, a 161th resistor, a 109th diode, a 108th diode, a 116th diode, a107th diode and a 102th transformer. The electrostatic fume purification drive power source can accurately reflect various abnormal conditions, can achieve various protection functions, can achieve automatic matching of the voltage and an electrostatic field and an automatic gear switching function to allow the electric field to work in an optimal state.

The invention discloses an infrared ray (IR) tawny lens, in particular to a safe lens reaching an IR3 infrared protection function. The lens comprises the following ingredients in parts by weight: 100 thousand parts of polycarbonate (PC), 10 thousand parts of IR colorant, one part of 8970 toner, 2.05 parts of 8403 toner and 3.13 parts of 8150 toner. The IR colorant with a given proportion is added in the PC material and then is mixed with the toner capable of filtering the visible light, the protection function of the IR tawny filter plate can be collectively realized, and the spectrum test result shows that the IR (780-2000NM) is less than 12 percent.

The present invention discloses an elastic adjustable double-glazed module protection device. The device comprises angle beads configured to clamp two adjacent corners of a double-glazed module, end face of one side of each angle bead is fixedly connected with a line stretcher; free ends of two line stretchers are located through an adjustable buckle; the adjustable buckle is a cylinder-shaped hollow barrel, the free ends of the line stretchers passes through one end face of the cylinder-shaped hollow barrel and then extends from the other end face; and the side walls of two ends of the cylinder-shaped hollow barrel are provided with a gripper-shaped screw thread neck configured to locate the free ends of the line stretchers. The elastic adjustable double-glazed module protection device is simple in structure and convenient to use, and is configured to protect the corners of the double-glazed module and effectively protect the corners so as to reduce the production and package cost and improve the work efficiency on the basis of effectively ensuing the transportation safety of the double-glazed module.

The invention relates to a motor control system, in particular to a starting protection circuit for a brushless DC motor; it solves the problem that when most of the starting circuits of the existing DC brushless motor directly start the motor, the starting current is too large, which may easily lead to poor operation of the device and cause logic Wrong technical question. A method for starting and protecting a brushless DC motor, comprising the following steps: step 1) setting a short-circuit protection current limit value A and an overload protection current limit value B; step 2) setting a board-level temperature limit value C; step 3) turning on the motor; step 4) Measure the current value on the main road of the brushless DC motor power supply; step 5) collect the current signal, and judge whether the current signal value reaches the short-circuit protection current limit A; step 6) judge whether the current signal value reaches the overload protection current limit value B; step 7) collect the board-level temperature value, and judge whether the temperature value reaches the board-level temperature limit value C. At the same time, the invention also provides a DC brushless motor starting protection circuit.