349results about How to "Complete protection functions" patented technology

The invention relates to a variable-frequency power source based on the control of a digital signal processor, which comprises a switch power source module, a control circuit, a circuit for isolating and shaping pulse-width modulating signal, IPM inverting circuits, a circuit for detecting and protecting busbar voltage, a rectification input slow-start circuit, a communication circuit, an interface circuit for isolating and inputting parallel signals and an human-computer interface circuit for displaying the key. The invention adopts the structure of a single digital signal processor (DSP) coupled with the double IPM inverting circuits, provides two paths of independent variable-frequency power sources for two sets of asynchronous motors at the same time and carries out independent speed regulations to the two sets of asynchronous motors. The variable-frequency power source of the invention has the advantages of small volume, low power consumption, high reliability and being convenient for bulk production, etc., and adopts an appropriate switch frequency and an advanced voltage space vector pulse width modulation algorithm (SVPWM), thereby lowering the noise during the operation of the asynchronous motors and increasing the voltage utilization rate, with obvious effect on energy saving.

This invention discloses a inversion method for photovoltaic parallel in network, which uses digital signal processor (DSP) as core, the power factor is one and having small harmonic pollution to electric network, said method is a high efficiency and high reliability inversion method.

The invention discloses an intelligent integrated power supply device for Internet of Things. The intelligent integrated power supply device comprises a front public power supply module, a single chip microcomputer core control module, a DC voltage grade conversion module and a communication interface module, wherein the front public power supply module comprises an AC/DC front base voltage stabilizing circuit and an auxiliary power supply circuit; the single chip microcomputer core control module completes collecting and monitoring of voltage and current of various paths of output modules, and achieves a programmable presetting function on output voltage and over-voltage, over-current and over-temperature protection functions of various output loops of a complete machine through digital potentiometers; the DC voltage grade conversion module comprises four paths of identical modules; each module comprises a DC/DC converter circuit, a current/voltage sampling circuit and the digital potentiometer; and the communication interface module is connected with serial communication pins of a single chip microcomputer, completes the function of connecting different forms of actual transmission interfaces and forms connection with a network from an upper node to a monitoring center.

The invention discloses a single welding and series welding integrity device of solar cell slices. The provided single welding and series welding integrity device of the solar cell slices is good in positioning accuracy and compatible in the solar cell slices with different specifications, and can improve the single welding and series welding production efficiency of the solar cell slices. The device comprises a device rack, the device rack is provided with a feed mechanism, a transmission and positioning mechanism, a welding and temperature control mechanism, a blanking mechanism, a control mechanism and a power supply and control mechanism. According to the single welding and series welding integrity device of the solar cell slices, a full manual welding mode is replaced by a full automatic mechanical welding mode, the production efficiency is remarkably increased, the cell slice failure rate during a welding process is reduced, and the device is suitable for cell slice welding of the solar cells.

The invention relates to a control system of an opening-closing die motor and a push-out motor of a fully-electric injection molding machine, comprising a computer controller, a PLC (Programmable Logic Controller), an opening-closing die push-out driver, the opening-closing die motor and the push-out motor which are mutually connected. The invention also analyzes the motion characteristics and the dynamic characteristics of a toggle lever mechanism of a five-hinge die-closing double-toggle die closing mechanism object, provides a die protection implementation method of a die closing mechanismunder the driving of a fully-electric motor as well as a die closing mechanism control method and a field oriented control algorithm on the basis of a fuzzy adaptive theory from the angle of a control theory, meets the control requirements on three aspects of the die closing force, the speed, and the position, ensures the reliable closing of the molded die and realizes the opening-closing motion of the die and accurate and stably push-out of products from the die; and the designed DSP (Data Signal Processing) driver ensures that the system has stable reliability under the condition of high load and simultaneously improves the disturbance compensation.

The invention discloses a control and protection circuit for a single-lithium battery electric tool and a detection and control method for the control and protection circuit. The control and protection circuit comprises a singlechip power supply circuit, a battery charging and discharging voltage detection circuit, a battery charging and discharging temperature detection circuit, a battery charging control management circuit, a motor switching and commutation control circuit and a working state indication circuit. A singlechip is used as a master control integrated circuit (IC), and is matched with simple peripheral components to realize all functions of protecting and controlling the single-lithium battery electric tool, so that the functions are flexibly designed, circuit complexity is lowered, the number of electronic components is decreased, cost is lowered, and the circuit is high in safety and reliability, and is almost power consumption-free when not working, and has the advantages of environment friendliness, energy saving, lightweight, convenience for use, high operation efficiency, long cycle life of a battery, and the like.

The invention discloses a frequency conversion constant-pressure water supply system and a control method thereof. The frequency conversion constant-pressure water supply system is characterized in that a programmable controller and a frequency converter are connected with a PID (Proportion Integration Differentiation) regulator and control a water pump set; and the PID regulator detects water pressure through a pressure sensor. The control method of the frequency conversion constant-voltage water supply system comprises the following steps of: when water consumption is increased, enhancing the working frequency of a water pump, and accelerating the revolving speed of the water pump; when water consumption is decreased, reducing the working frequency of the water pump, and decelerating the revolving speed of the water pump. The invention regulates the revolving speed of various pumps in the living water supply system by adopting the frequency converter and can realize that one frequency converter simultaneously controls multiple water pumps, realize automatic constant-pressure water supply and additionally set a night small pump operating and fire-fighting function.

The invention discloses an LED protecting chip based on PWM shunt, which comprises a PWM shunt switch, a power supply unit, a voltage detecting unit, a temperature detecting unit and a PWM control signal generating unit, wherein the PWM shunt switch is connected with two ends of an LED in parallel, and the current passing through the LED is controlled by controlling the working duty ratio of the PWM shunt switch; the power supply of the chip is taken from the two ends of the LED and supplies power for other units after being processed by the power supply unit; the grounding terminals of the power supply unit, the temperature detecting unit and the PWM control signal generating unit are connected with the cathode of the LED; the voltage detecting unit and the temperature detecting unit respectively detect the voltages at the two ends of the LED and the junction temperature of the LED, and detecting signals output by the voltage detecting unit and the temperature detecting unit are connected with the PWM control signal generating unit; and PWM signals generated by the PWM control signal generating unit are connected with the control terminal of the PWM shunt switch to realize constant temperature, overvoltage and shut-off protection of the LED. The LED protecting chip has the advantages of complete protecting functions, low power loss, simple power supply and easy integration.

The invention discloses a one-frequency one-pump constant pressure water supply control system, which comprises a control unit (6) for controlling the operation of the system and controlling the output frequencies of frequency converters, a human-machine interface (7) for setting parameters of the system and monitoring operational data, the frequency converters (5a, 5b and 5c) for controlling the rotating speeds of water pump motors, and sensing instrument units (1, 3 and 4) connected with the control unit and used for acquiring external feedback information, wherein according to the control system, water pumps (2a, 2b and 2c) in a controlled pump group are matched with the frequency converters and controlled by adopting a common-frequency and common-speed control technology to implement constant pressure water supply.

This invention relates to a combined control device for integrated instruments and electric appliances composed of a shell with a faulty display window and labels, an electronic control circuit, an intelligent expanding module circuit, a moving and static contactor component with a current sensor at the side of a static contact bridge, an iron core, a coil and a spring, which realizes multiple kinds of protections and fault display by the electronic control circuit and has the function of power saving, a photo electric isolation technology is applied for its high voltage drive and low voltage signal circuit and the I/O expanding interface and an intelligent expansion module are applied to enrich the function of the display and control of the instrument.

The invention provides a safety interlocking protection system used for a powdered coal pressure gasification process. The system comprises: a detection unit (A1), used for detecting abnormal conditions of a powdered coal pressure gasification system (B); a control unit (A2), used for triggering corresponding emergency operations of safety interlocking protection to the powdered coal pressure gasification system (B) according to the detected abnormal conditions detected by the detection unit (A1); an execution unit (A3), used for executing the corresponding emergency operations of safety interlocking protection to the powdered coal pressure gasification system (B) according to triggering of the emergency operations by the control unit (A2); the implementation of the said pulverized coal pressurized gasification system (B) the emergency operation of the safety interlocking protection; and a sequence of event (SOE) recording unit (A4), used for acquiring and recording the abnormal conditions. The safety interlocking protection system provided by the invention has the advantages of high safe reliability, strictly designed program logic, and sequence of event recording function.

The invention relates to a power filter in a power filtering and protection technique, in particular to a transient state and stable state resisting combination interference power filter and a design method thereof. The power filter is characterized by at least comprising protection circuits and filter circuits, wherein the protection circuits are connected with the filter circuits in series; the filter circuits are packaged in a filter shell, which has a nickel-plated surface and is made of cold-rolled steel plates, at a constant temperature through epoxy resin; the filter circuits are type A, type U, type D and type F filter circuits; and the protection circuits are provided with TVS tubes on line-line and line-ground of input ends of the filter circuits respectively to form a line-line and line-ground transient protection module. The transient state and stable state resisting combination interference power filter not only has good common mode and difference mode filtering performance, but also can effectively inhibit surge interferences on a power line, and is particularly suitable for various types of direct current electronic devices having high requirements on CS116.

The invention belongs to the technical field of power equipment, and particularly relates to a reactive power compensation controller for power, in particular to a device of the reactive power compensation controller applied to an electric power line. The reactive power compensation controller for power is a design of the reactive power compensation controller on the basis of an FPGA and DSP unit, and comprises a power supply unit, the FPGA and DSP unit, a key input unit, a liquid crystal display unit, a communication unit and a control unit. Automatic tracking compensation is carried out according to the change condition of a reactive power and a voltage of the line, so that the power factor is improved; the voltage quality is improved; the reactive power transmission flow of a power distribution line is reduced; the reactive power transmission distance of the power distribution line is shortened; and the reactive power compensation controller also has significant characteristics of high reliability, small size, easiness in installation, powerful function and low cost.

The invention discloses a light-emitting diode (LED) driver for illumination. The LED driver for the illumination comprises an alternating current (AC)/direct current (DC) module and a constant current control module, wherein the AC/DC module adopts an LLC resonant conversion topological structure, and is used for converting alternating current commercial power into direct current; and the constant current control module is connected with the AC/DC module and used for outputting constant current by taking low-voltage direct current as driving voltage to drive an LED light source by the constant current. The LED driver for the illumination can realize the constant current driving of LEDs for the illumination, and simultaneously ensures the safety and reliability of the LEDs.

The invention discloses a protection setting calculation model for a high-voltage variable-frequency motor. The protection setting calculation model for the high-voltage variable-frequency motor comprises a protection setting calculation model for the high-voltage variable-frequency motor with a phase-shifting transformer and a protection setting calculation model for the high-voltage variable-frequency motor without the phase-shifting transformer, and each of the two protection setting calculation models comprises a long start protection setting calculation model, a current quick-breaking protection setting calculation model, an overcurrent protection setting calculation model, a negative-sequence current protection setting calculation model, an overheat protection setting calculation model, a ground protection setting calculation model and a low-voltage protection setting calculation model; the protection setting calculation model for the high-voltage variable-frequency motor without the phase-shifting transform further comprises a locked-rotor protection setting calculation model. The protection setting calculation model for the high-voltage variable-frequency motor provides reference basis for the protection setting calculation of the high-voltage variable-frequency motor, and therefore, the protection functions are more complete, the protection set value is more reasonable, and the high-voltage frequency converter and the high-voltage motor can be protected to the utmost extent.

The invention provides a detection circuit for a pressure sensor of an aeroengine. The pressure sensor is electrically connected with an AD converting unit through a sensor loop detection unit and an input instrumentation amplifier respectively. Voltages of four detection resistors of a Wheatstone bridge of the pressure sensor are input to the instrumentation amplifier U2; the instrumentation amplifier U2 transmits a collected voltage value to the AD converting unit; the loop detection unit detects voltage drops of detection points on the four detection resistors of the Wheatstone bridge, the voltage drops are operationally amplified through an operational amplifier on the loop detection unit and then are transmitted to the AD converting unit, and a CPU of an electronic controller of the aeroengine judges faults of the detection points of the Wheatstone bridge of the pressure sensor according to an output voltage value of one loop detection circuit and the voltage obtained after AD conversion through the AD converting unit. The detection circuit has the advantages that the voltage is stable and reliable, output voltage ripples are very small, test accuracy is high, and a millivolt voltage difference value of P3 voltage output is not affected. The actual test shows that the maximum error is not greater than 0.05bar.

The invention discloses a universal precision numerical control support vertical column which mainly comprises a support rod, an outer cylinder sleeve, a lead screw pair, a speed reducer, a numerical control module, an electric plug connector and a base, wherein the outer cylinder sleeve is sleeved outside the support rod, the speed reducer is connected with a ball screw, the numerical control module is used for realizing a numerical control function of a motor, the electric plug connector is connected with the numerical control module, and the base is fixedly connected with the electric plug connector. The support rod is guided by a spline guide shaft, a guide groove in the inner wall of the outer cylinder sleeve and a linear sliding bearing, and the linear sliding bearing is mounted at the upper end of the inner wall of the outer cylinder sleeve. The universal precision numerical control support vertical column is convenient to mount and easy to operate, can be individually used, parts are supported and positioned in the machining and measuring process, the automation degree of the production process is improved, the universal precision numerical control support vertical column modularly designed is used for flexibly, intelligently and digitally supporting three-dimensional curved surface parts in the manufacturing process as a multipoint flexible fixture is mounted, and manufacturing cost and technical difficulty are reduced.

The invention relates to a power supply source of a trigger circuit in a 6/10KV soft start device. The power supply source comprises a high-frequency adjustable constant-current supply, a single-turn electric current loop, a coupling mutual inductor and a voltage stabilizing circuit, wherein the high-frequency adjustable constant-current supply sequentially passes through the coupling mutual inductor of each trigger unit to form the high-frequency single-turn electric curent loop; the electrical energy is coupled to each trigger unit, and a stable trigger power supply is obtained through a voltage stabilization circuit. The insulating energy supply problem of the trigger circuit of a thyristor convertor valve series element in a middle and high pressure soft start device and a deflector is solved, the stable power supply and high dielectric strength of the trigger circuit are ensured, the volume is small, the fabrication technology is simple, and the integrated connection is easy to be realized. The invention can be applied to the control of the middle and high pressure soft start and the insulating energy supply of the trigger circuit of the thyristor series element in a high-frequency convertor valve, and the invention is universal and worth popularizing.

The invention belongs to the technical field of conveyor protection devices and particularly relates to a belt conveyor protection device for a coal mine. The belt conveyor protection device for the coal mine comprises a core mine intrinsic safety type programmable logic controller and a signal detection unit connected with the programmable logic controller. The signal detection unit comprises sensors and amplified phones. The sensors comprise the coal piling sensor, the mine smoke sensor, the speed detection sensor, the mine temperature sensor, the mine belt deviation sensor and the mine intrinsic safety type longitudinal tear sensor. The amplified phones comprise the mine intrinsic safety type sudden stop amplified phone, the mine intrinsic safety type pull rope sudden stop amplified phone A and the mine intrinsic safety type pull rope sudden stop amplified phone B. The belt conveyor protection device for the coal mine has the advantages that programming can be conducted on site, the number of input / output points can be increased, work is reliable, operation is convenient, expansion is flexible, the design is flexible, protective functions are complete, display information is abundant, and control interlocking and protection functions of related devices can be achieved reliably and conveniently.