737 results about "Arc voltage" patented technology

A monitor for an electric arc welder as the welder performs a selected arc welding process by creating actual welding parameters, such as arc current and arc voltage, between an advancing welding wire and a workpiece, where the process involves an arc and is defined by a series of rapidly repeating wave shapes constituting a weld cycle with a cycle time, the wave shapes are each segmented into time states having command signals corresponding to the actual parameters and a time duration. The monitor selects a specific wave shape state, reads one of the actual parameters, compares the actual read parameter with a function of the command signal corresponding to the actual parameter, and uses-the comparison to generate a characteristic of the welding process during the selected state.

A control system for an electric arc welder performing a welding process between an electrode and a workpiece, which system comprises: a high speed switching type power supply with a controller operated at a switching frequency of at least about 10 kHz with an input current control signal to adjust the output current of the power supply; a first sensor sensing the actual arc voltage; a second sensor sensing the actual arc current; a first circuit for creating a power signal representing the desired real time power level at progressive times during the welding process; a second circuit for creating a function of the sensed actual voltage and the sensed actual current; and a third circuit for adjusting the current control signal in accordance with the difference between the power signal and the function of the actual voltage and current, preferably arc power.

An electrode position detection system for a welder having a laser that is projected in a lateral plane to laterally cross a welding wire at a location below a contact tip of a welding gun and a receiver that receive the laser bean after crossing the welding wire, and a measuring device that determines one or more parameter of the welding wire based on the received laser beam. Arc voltage measurements can also be used to determine one or more parameter of the welding wire.

The invention discloses a swing arc-based multi-layer and multi-channel weld tracking system and an identification method thereof. The weld tracking system comprises a welding gun, a welding power supply, a wire feeder, a welding tractor, a swinger, a driver, a hall current sensor, a main carriage and the like, wherein the welding gun is used for performing oscillatory scanning on a weld groove when driven by the swinger in the welding process, the change of relative positions between the welding gun and a workpiece directly causes the change of arc length, and the change of the arc length causes the change of arc parameters such as arc current, arc voltage and the like; the hall current sensor is used for sending detected welding current signals and positioning pulse signals to the controller, automatically judging the weld shape according to certain operation rules, processing the weld shape by selecting corresponding weld deviation signal extraction schemes and acquiring weld deviation information; and the swinger is used for regulating weld deviation, automatically tracking welds and completing automatic welding.

The invention provides a non-stick pan coating layer and a preparation method thereof. The coating layer comprises Al-Cu-Fe-Cr-B quasicrystalline alloy which has components as follows by the atomic percentage: 70-90 of Al, 1-15 of Cu, 5-15 of Fe, 5-15 of Cr, and the balance of B and unavoidable impurity. The method comprises the specific steps as follows: (1) smelting alloy materials with a spraying device at a temperature of 900-1100 DEG C to prepare alloy powder; (2) spraying the alloy coating layer on a boiler basal body with a plasma spraying device, with a main gas feed rate of 65 L/min, a secondary gas feed rate of 20-30 L/min, an arc current of 550-590A, an arc voltage of 45-60V, a powder delivering amount of 10-15 g/min, and a coating layer thickness of about 100-200 micro. At a cooking temperature, the invention has the advantages of stable chemical property, large rigidness, lower cost than Teflon or organic silicon, low surface friction coefficient, and the like.

The invention relates to a series capacitor type high-voltage direct current breaker and a control method thereof. The breaker comprises direct current breaker units which are connected in series, and each direct current breaker unit comprises a change-over switch, a switching circuit and an energy consumption device which are connected in parallel. The change-over switch adopts a mechanical switch, and the switching circuit adopts a resistance capacitance branch circuit, and the energy consumption device adopts a lightning arrester. The high-voltage direct current breaker is connected with a control circuit, and the mechanical switch detects failure current and acts at the T1moment, and transfers the failure current into the resistance capacitance branch circuit. The failure current charges a capacitor, and controls switching-on and switching-off of the mechanical switch. Before the mechanical switch witches off at the T2 moment, charging voltage on two ends of the capacitor throughout is lower than arcing voltage at fractures of the mechanical switch. When the voltage on two ends of the capacitor reaches operation voltage of the lightning arrester, the control circuit controls the lightning arrester to act at the T3 moment so that energy can be released from the lightning arrester. According to the series capacitor type high-voltage direct current breaker and the control method thereof, the mechanical switch does not have electric arc, non-arc breaking off is realized, energy is released through utilization of the lightning arrester, quick extinguishing of the electric arc is realized, and the failure current is cut off.

The invention relates to a multifunctional digitized welding machine, which comprises a full-bridge type inversion main circuit, a control circuit and a soft switch PWM (Pulse-Width Modulation) driving circuit, wherein the full-bridge type inversion main circuit is composed of an IGBT (Insulated Gate Bipolar Translator); the soft switch PWM driving circuit of a symmetric carrier is based on a CPLD (Complex Programmable Logic Device) or FPGA (Field Programmable Gate Array); the inversion main circuit comprises a rectifying filtering module, an IGBT full-bridge inversion module, a main transformer and a secondary rectifying filtering module; the control circuit comprises a DSP (Digital Signal Processor) control processor, a manual idle-dropping circuit, a regulating, detecting and sampling circuit for a feedback current and voltage signal outputted by the welding machine, a collecting and setting circuit for a feeding speed and given voltage of the welding machine, a display circuit for an interface and parameter of an external keyboard and a communication circuit connected to a PC (Personal Computer); the regulating, detecting and sampling circuit for the feedback current and voltage signal outputted by the welding machine comprises a Hall voltage sensor for detecting a feedback arc voltage outputted by the welding machine and a Hall current sensor for detecting an output current of the welding machine; and the collecting and setting circuit for the feeding speed and given voltage of the welding machine comprises a collecting circuit for a given voltage and given current, namely the feeding speed, on a panel of a feeder.

The invention relates to a disconnecting apparatus (1) for direct current interruption between a direct current source (2) and an electrical device (3), in particular between a photovoltaic generator and an inverter, with a current-conducting mechanical switching contact (7a, 7b) and with semiconductor electronics (8) connected in parallel with the switching contact (7a, 7b). The semiconductor electronics (8) are non-conducting when the switching contact (7a, 7b) is closed, wherein a control input (15) of the semiconductor electronics (8) is wired with the switching contact (7a, 7b) in such a way that, when the switching contact (7a, 7b) opens, an arc voltage (ULB)generated as a result of an arc (LB) via the switching contact (7a, 7b) switches the semiconductor electronics (8) to be conducting.

The invention provides a method for detecting the stability of the gas tungsten arc welding (GTAW) additive manufacturing process based on arc voltage feedback. The method comprises the steps that the stability of the process is reflected through the arc length, the arc length is indirectly fed back though arc voltage, and the initial position of a GTAW gun on a substrate is adjusted; in the forming process of a first layer, a voltage sensor is matched with a data acquisition card to obtain a variation signal of the arc voltage along a forming path; the arc voltage is converted into the arc length according to a calibration relationship, a variation signal of the arc length along a forming path is obtained, and a second layer, a third layer until the n layer are formed, so that a variation signal of the n layer arc length along a forming path is obtained; and if the arc length is within a certain range, it is judged that the forming process is stable. According to the method for detecting the stability of the GTAW additive manufacturing process based on arc voltage feedback, the purpose of real-time detection of the stability of the GTAW additive manufacturing process is effectively achieved, and the detection process is easy to operate, high in stability, not prone to being interfered by intense arc light, high in calculation speed, capable of achieving automation easily and suitable for engineering application of real-time site detection.

The present invention relates to a method of controlling a welding power source and the associated wire feed arrangement intended for arc welding operations that employ a consumable electrode, to ensure crater filling at the end of the welding operation by means of fading of the arc voltage and of the wire feed rate, respectively. More particularly the invention relates to a method comprising arc voltage reduction at the onset of the end of the welding operation for a period that is considerably briefer than the total fading time, during which the arc voltage is reduced to a value below the value at which it is possible to weld during continuous welding and advancement in the joint with otherwise unchanged welding parameters, followed by a further reduction to a final value of arc voltage and fading of the wire feed rate simultaneously with the arc voltage fading to a final value of the wire feed rate.

The invention relates to an anode for an arc plasma torch and a non-transferred arc plasma torch with the anode. The anode comprises a stable arc section and an anode nozzle section which have evenly varied diameters, a burble section which is connected with the two sections and is provided with a groove with increasing diameter, wherein an insulating material is filled in the burble section. The plasma torch comprises a swirler, a cathode, the anode and a cathode-anode isolation sleeve which are arranged coaxially. Working gas flows into the stable arc section by rotation of the swirler, and restricts arc in an axle center position stably; the burble section ensures that air flow generates high frequency turbulence to drive an arc stream to swing in high frequency randomly and constantly impacts the inlet side of the anode nozzle; and the anode arc root moves quickly under the action of high speed air flow. The non-transferred arc plasma torch can obviously improve the arc voltage, the jump frequency and the moving speed of the anode arc root, reduces heat consumption, has the characteristics of high power, low electrode loss rate, high heat conversion efficiency, wide operation parameter range, small arc voltage fluctuation and the like, and is particularly suitable for gas heating.

The present invention is directed to a power supply that maintains power supply to a plurality of electronic components of a welding system when an arc voltage falls below approximately 15 volts. The invention includes a power supply having a secondary supply circuit that improves the operable range of the power supply by maintaining power to components of a welding system when the arc voltage at a weld is greater than or equal to approximately 10 volts. As a result, the operable range of the power supply is no longer limited by the arc voltage. The invention includes a secondary power supply circuit having a power switch that when activated causes a buildup of energy in the transformer assembly whereupon deactivation of the power switch in the magnetic core is exhausted such that power supply is maintained. The power switch regulates the transformer assembly such that sufficient secondary power is provided if the input voltage to the transformer is as low as approximately 10 volts.

The invention discloses an on-line monitoring system and method for a weld pool dynamic process. The on-line monitoring system for the weld pool dynamic process comprises an integrated control center, a sensing detection subsystem, a motion control subsystem, an expert database, a welding process control subsystem and a data transmission interface. The integrated control center is used for receiving data information, sending motion control instructions, welding process control instructions and data and reading instructions. The sensing detection subsystem is used for acquiring weld pool image information, process information, acoustical signals and temperature. The motion control subsystem is used for accomplishing weld seam tracking, welding gun height adjustment and speed control. The expert database is used for storing welding process control parameters, motion control parameters and sensing detection information. The welding process control subsystem is used for achieving control on welding current, arc voltage and speed. The data transmission interface is used for achieving data communication. The on-line monitoring method adopts the monitoring system to carry out on-line monitoring. The on-line monitoring system and the on-line monitoring method for the weld pool dynamic process have the advantages of being high in reliability, highly integrated in function and the like.

A novel composition, system and method thereof for improving beam current during boron ion implantation are provided. The boron ion implant process involves utilizing B2H6, BF3 and H2 at specific ranges of concentrations. The B2H6 is selected to have an ionization cross-section higher than that of the BF3 at an operating arc voltage of an ion source utilized during generation and implantation of active hydrogen ions species. The hydrogen allows higher levels of B2H6 to be introduced into the BF3 without reduction in F ion scavenging. The active boron ions produce an improved beam current characterized by maintaining or increasing the beam current level without incurring degradation of the ion source when compared to a beam current generated from conventional boron precursor materials.

The invention discloses a three-dimensional weld seam tracking system and method based on visual and arc-pressure sensing. The system comprises an image acquisition and processing module, an arc pressure sensing module and a robot control module; and the image acquisition module is used for shooting an arc, a molten pool and a weld image in the welding process, the image is transmitted to an industrial personal computer, and the industrial personal computer calculates and obtains a welding deviation through an image processing algorithm. The arc pressure sensing module is used for collecting arc voltage values in the welding process and transmitting the arc-pressure value to the industrial personal computer, the industrial personal computer keeps the stability of the arc length in the welding process according to the arc-pressure-arc length relation, and the effect of height direction control is achieved. The robot control module is used for robot movement deviation correction and welding gun posture control.

Applicant has disclosed a method and apparatus for a bipolar automotive electrical system. In the preferred “apparatus” embodiment, Applicant's bipolar electrical system comprises: two (e.g., 12 V) batteries of equal, but opposite voltage (e.g., +12 V, −12 V), with bipolar outputs; an alternator, responsive to the batteries, which controls electrical charge to the batteries individually; an automotive DC motor connected by a single lead wire to the bipolar outputs from the batteries; and, wherein the reversible motor is run off the bipolar output without the need for any intervening devices between the bipolar command outputs and the motors. Alternatively, the alternator can inherently charge the batteries sequentially with the lowest voltage battery being addressed first. This approach allows heavy loads to be powered by 24 V or 48 V DC, yet the arc voltage to ground is still only 12 V or 24 V DC.