137results about How to "Arc elimination" patented technology

A plasma processing chamber for processing a substrate to form electronic components thereon is disclosed. The plasma processing chamber includes a plasma-facing component having a plasma-facing surface oriented toward a plasma in the plasma processing chamber during processing of the substrate, the plasma-facing component being electrically isolated from a ground terminal. The plasma processing chamber further includes a grounding arrangement coupled to the plasma-facing component, the grounding arrangement including a first resistance circuit disposed in a first current path between the plasma-facing component and the ground terminal. The grounding arrangement further includes a RF filter arrangement disposed in at least one other current path between the plasma-facing component and the ground terminal, wherein a resistance value of the first resistance circuit is selected to substantially eliminate arcing between the plasma and the plasma-facing component during the processing of the substrate.

Method and apparatus for detecting or suppressing electrical arcing or other abnormal change in the electrical impedance of a load connected to a power source. Preferably the load is a plasma chamber used for manufacturing electronic components such as semiconductors and flat panel displays. Arcing is detected by monitoring one or more sensors. Each sensor either responds to a characteristic of the electrical power being supplied by an electrical power source to the plasma or is coupled to the plasma chamber so as to respond to an electromagnetic condition within the chamber. Arcing is suppressed by reducing the power output for a brief period. Then the power source increases its power output, preferably to its original value. If the arcing resumes, the power source repeats the steps of reducing and then restoring the power output.

An electrosurgical system for sealing vessels using capacitive (RF) dielectric heating and a method thereof are provided. The system includes an electrosurgical instrument having an end effector with parallel plate electrodes that will clamp onto a vessel and maintain a specified gap distance; however, the electrodes will be coated with a non-conductive dielectric material. Such an end effector will ensure that direct conduction between the electrodes does not occur through tissue or fluids and effectively creates a parallel plate capacitor with a dielectric, e.g., tissue and coating, in between the plates. The electrosurgical instrument will be activated with an AC signal at a specified RF frequency, e.g., a Debye resonance frequency, via an electrosurgical generator. An effective AC current will flow through the tissue and cause heating due to fictional losses from rotating polar molecules in the tissue.

A fastener assembly is installable in an opening of a workpiece and includes an outer member and a fastener. The fastener is movable through a passageway of the outer member. The fastener includes a mandrel and a stem. The mandrel is dimensioned to radially expand the outer member. The stem has an expansion portion and a propping portion. The expansion portion radially expands the outer member after the outer member has been expanded by the mandrel. The propping portion keeps the expanded outer member in an installed expanded configuration. The outer member and fastener are installed in a single operation to reduce installation time.

An electric plant with a safety device, a method for remedying faults in a switchgear installation, and the use of a closing contact to provide security against faults. The plant includes a switchgear installation, consumer loads connected to the switchgear installation, and at least one feeder cable to the switchgear installation. The plant provides a strong consumer network that still has a high degree of safety against damage caused by short-circuiting faults. The plant includes at least two feeder cables, each connected to its own current source such as a transformer or a generator. At least one of the feeder cables is connected by a branch cable to ground. The branch cable is provided with a closing contact, which is normally open. The closing contact is arranged to be activated, i.e. to quickly close the connection to ground, in the event of short-circuiting in the switchgear installation.

A controller for a load includes separable contacts, an operating mechanism structured to open and close the separable contacts, a processor circuit cooperating with the operating mechanism to open and close the separable contacts, and an output controlled by the processor circuit. The output is structured to cause a remote circuit interrupter to open a power circuit electrically connected in series with the separable contacts. The processor circuit is structured to detect failure of the controller to control the load and activate the output.

The invention discloses a relay zero crossing disconnection arc extinguishing method, belonging to the technical field of relay arc extinguishing. The essential technical scheme thereof comprises the following steps: (1) establishing a current measuring circuit for detecting current frequency; (2) after detecting the zero crossing point of the current, taking the corresponding time when an electric arc value is minimum as a delay time t, and recording the delay time t; and (3) as long as a command needs to be sent to a relay for disconnection, firstly, detecting the zero crossing point of the current and then disconnecting at the delay time t. The method of the invention has simple operation, convenience and practicality and can reduce and even eliminate electric arc at the moment when the relay is disconnected, thereby greatly prolonging the service life of relay contacts and being suitable for arc extinguishing of the relay.

A device is provided for preventing arcing between contacts of a switching device as the contacts of the switching device are opened. The device includes a coil suppression circuit connected in parallel with the coil. The coil suppression circuit dissipates the energy stored in the coil in response to the de-energization of the coil. A first solid state switch has a gate operatively connected to the coil suppression circuit and is connected in parallel with the contacts. The first solid state switch is movable between an open position preventing the flow of current therethrough and a closed position in response to the dissipation of energy by the coil suppression circuit.

A device that allows standard non-load break disconnect switches to become full load break disconnect switches in that they can interrupt high levels of their rated current with no arcing or burning when the switch is opened under load in direct current use on electric railways, electric trolley bus systems, mine operations and motor controls.

The invention provides an overvoltage protection element, with a housing, an overvoltage-limiting component, two connecting elements as well as an elastic separation tongue, the separation tongue in a standard state of overvoltage protection element is connected with the first connecting element in a conductive contact by the first end and is connected with the overvoltage-limiting component in a conductive contact by the second end, and the second end of the separation tongue is connected with the overvoltage-limiting component by the welding point, and the welding connection is separated when the temperature of the overvoltage-limiting component exceeds the pregiven operating value, thereby the formed separation point separates the electric aspect when the overvoltage-limiting component is thermal overload. In order to guarantee that the defective overvoltage-limiting component, high-insulating intensity and creepage intensity are reliably separated, and the separation tongue overcomes elastic force itself when connected with the overvoltage-limiting component by the welding point on the second end, and is extends and deflects relative to a loose state thereof, thereby the second end of the separation tongue not only executes the linear motion F1, but also executes the gyroscopic motion F2, when the welding connection is separated.

The invention discloses a numerical control welding method, a numerical control welding device and a numerical control welding system. The numerical control welding method includes: collecting video images of preset welding positions in advance and sharpening edges to acquire sharpening images of the preset welding positions; focusing a camera to a welding joint on a welding gun, collecting video images containing the welding joint and the current welding positions every time when the camera is adjusted to capture new position, and sharpening edges to acquire sharpening images containing the welding joint and the current welding positions; judging whether the sharpening images containing the welding joint and the current welding positions are matched with the sharpening images of the preset welding positions or not, and if yes, locking the welding joint of the welding gun at the current welding position; and scanning the welding joints of the locked welding positions to acquire video images when welding, filtering to acquire welding tracks, and controlling a numerical control drive device to adjust position and rotating angle of the welding joint of the current welding gun to follow the welding tracks to weld. Welding point positions are positioned accurately, welding tracking is accurate, and efficient automatic welding is realized.

The invention provides an arc-suppression circuit of an alternating-current contactor and a control method thereof, which are used for arc-suppression of alternating-current contactors, various relays and switch appliances. The arc-suppression circuit of the alternating-current contactor comprises a main switch K1 and a controllable double-end circuit A. The arc-suppression circuit of the alternating-current contactor is characterized in that the main switch K1 is a mechanical type switch, and the controllable double-end circuit A comprises a controllable double-end circuit A, a first voltage end and a second voltage end, wherein the first voltage end and the first electrode end P1 of the main switch are at the same end, and the second voltage end and the second electrode end P2 of the main switch are at the same end; the invention better solves the technical problem of severe fire striking and arc pulling phenomena which are difficult to solve in the structure of the prior similar product, and the control method is advanced. The invention has the advantages of no arc pulling, large current-carrying capacity, low cost, long service life, small volume, convenient installation, use and replacement and extensive application range, thereby being suitable for generalization, popularization and use in the field of electric appliances.

A circuit fault detector and interrupter which consists of parallel current conduction paths, including a path through a mechanical contactor and a path through a power electronics switch. A fault can be detected by a fault detection circuit within 50 microseconds of the occurrence of the fault, causing the mechanical contactor to be opened and the fault current to be commutated via a laminated, low-inductance bus through the power electronics switch. The power electronics switch is thereafter turned off as soon as possible, interrupting the fault current. The fault current can be interrupted within 200 microseconds of the occurrence of the fault, and the device reduces or eliminates arcing when the mechanical contactor is opened.

A fastener assembly is installable in an opening of a workpiece and includes an outer member and a fastener. The fastener is movable through a passageway of the outer member. The fastener includes a mandrel and a stem. The mandrel is dimensioned to radially expand the outer member. The stem has an expansion portion and a propping portion. The expansion portion radially expands the outer member after the outer member has been expanded by the mandrel. The propping portion keeps the expanded outer member in an installed expanded configuration. The outer member and fastener are installed in a single operation to reduce installation time.

Circuits integrated or integrable with a photovoltaic panel to provide built-in functionality to the photovoltaic panel including safety features such as arc detection and elimination, ground fault detection and elimination, reverse current protection, monitoring of the performance of the photovoltaic panel, transmission of the monitored parameters and theft prevention of the photovoltaic panel. The circuits may avoid power conversion, for instance DC / DC power conversion, may avoid performing maximum power tracking to include a minimum number of components and thereby increase overall reliability.

The invention relates to a distribution network feeder terminal unit power supply management system and method. The system comprises an alternating current power supply module, a main control back-up power supply charging and discharging module, a work communication power supply monitoring control module and a back-up high-voltage operating power supply module. In the distribution network feeder terminal unit power supply management system, the alternating current power supply module is powered by two paths of alternating current mains supply, so that the power supply reliability of the alternating current mains supply is ensued; the main control back-up power supply charging and discharging module can provide backup power when the alternating current mains supply is in outage to ensure the normal operation of the distribution network feeder terminal unit when the alternating current mains supply is in outage; the work communication power supply monitoring control module can well solve the problem of voltage jitter when the main control back-up power supply charging and discharging module is in power supplying; and the back-up high-voltage operating power supply module can well eliminate arc discharge caused by switch equipment actions, so that the power supply safety and the reliability of the high-voltage operating power supply are ensured.

An arc suppression device includes an AC to DC converter, a switch, a resistor and a controller. The switch is coupled between the AC to DC converter and a plasma chamber. The resistor is coupled in parallel with the switch. The AC to DC converter is configured to convert an AC voltage into a DC voltage for providing to the plasma chamber. The controller is configured to detect a unit-time rate of change (ROC) of a plasma current received by the plasma chamber. When the controller determines that the unit-time ROC of the plasma current is larger than a first unit-time ROC threshold, the controller controls the switch to electrically isolate the AC to DC converter and the plasma chamber to reduce the plasma current to a first current value through the resistor.

A brush and brush holder assembly for a micro horsepower electric motor includes a brush having a tip with a recessed portion; a brush holder surrounding the tip of the brush and having a cutout portion; a shunt carrying current to the tip of the brush; and an independent coil wire spring which does not carry current. This independent coil wire spring has an end which protrudes into the cutout portion of the brush holder and applies constant pressure to the recessed portion in the tip of the brush. The brush and brush holder assembly also has an electrical connection attached to the shunt. This electrical connection may carry direct current to the shunt.

The present embodiments relate to a contact switching mechanism and an electromagnetic relay that can promptly extinguish an arc generated between contacts with a simple and inexpensive structure without negatively influencing the spring property of a movable contact piece. A contact switching mechanism includes a fixed contact piece with a fixed contact and a movable contact piece with a movable contact which faces the fixed contact in a contactable manner. At least either one of the contact pieces is provided with an extension which extends toward the contact of the remaining contact piece.

The invention relates to a zero-charge starting and stopping circuit of an inverter. The power supply of the inverter is divided into a main loop power supply and a control loop power supply, the main loop power supply is realized by connecting a circuit consisting of a relay RY1 and a relay RY2 in serial connection between a power supply and a current-limiting resistor, an SSR (Solid State Relay) static switch is arranged between the power supply and the current-limiting resistor and between the power supply and a direct-current bus capacitor respectively, the control loop power supply is realized by connecting a starting-stopping circuit between a positive end and a negative end of the power supply, a relay RY4 is arranged between the positive end of the power supply and an inversion control circuit in serial connection, the starting-stopping circuit is externally connected with a starting key and a stopping key, the inversion control circuit is controlled through the relay RY4, the starting-stopping circuit receives a state returning signal of the inversion control circuit, the malfunction time sequence control is realized, and the output end of the inverter is connected with an output contactor MOUT to realize the output control of the inverter. The zero-charge starting and stopping circuit of the inverter has the characteristics that the inversion control is prior to the electrification of a main loop, the main loop is powered off after the inversion control, and the inversion control circuit is not powered down.

The invention relates to a power supply device, in particular to an arc extinguishing control device for a contact net, which is mainly used for a railway contact net, and is used for eliminating the fault phenomenon of the contact net such as arc discharge, trip, burn and the like. The arc extinguishing control device consists of an arc extinguishing main controller MCU, an overvoltage absorber MDA and a permanent-magnetic controlled arc extinguishing switch, wherein the overvoltage absorber MDA and the permanent-magnetic controlled arc extinguishing switch are connected in parallel, and the arc extinguishing main controller MCU is connected with the permanent-magnetic controlled arc extinguishing switch. The arc extinguishing control device has the advantages that the device with the arc extinguishing capacity assists the arc discharge phenomenon between an electric arc and the contact net; electric appliances with the arc extinguishing capacity are arranged to inhibit the electric arc during the running so as to shorten the arcing time and arcing strength; and the device radically avoids trip accidents of the power supply and burn accidents for the electric appliances.

The invention discloses a system for safely powering on / off high-voltage circuits, which is used for safely powering on / off the high-voltage circuit of an electric vehicle. The system comprises an electronic control unit, a first high-voltage circuit, a relay, a second high-voltage circuit, and a time sequence control circuit, wherein the electronic control unit is used for sending a high-voltage circuit connecting signal or a high-voltage circuit disconnecting signal; the first high-voltage circuit, the relay and the second high-voltage circuit are used for connecting or disconnecting a power battery and a motor; and the time sequence control circuit is used for sequentially controlling the connection of the first high-voltage circuit after receiving the high-voltage circuit connecting signal, controlling the relay to be connected if a current change rate detected by a current sensor is smaller than a threshold value, controlling the first high-voltage circuit to be disconnected if the current change rate detected by the current sensor is smaller than the threshold value, controlling the second high-voltage circuit to be connected after receiving the high-voltage circuit disconnecting signal, controlling the relay to be disconnected, and controlling the second high-voltage circuit to be disconnected if the current change rate detected by the current sensor is smaller than the threshold value. The invention further discloses a method for safely powering on / off the high-voltage circuits.

The invention belongs to the field of electrified railway contact networks, and relates to a self-clinching chucking busbar elastic wire clip, which comprises a hang lever (1) used for being connected with a steel girder, and a cylinder body (5) in which a rubber elastic layer (3) is arranged, and is characterized in that: the top surface and the bottom surface of the rubber elastic layer (3) are provided with a top plate and a bottom plate respectively, wherein the top plate serving as a top cover is fixedly connected with the top of the cylinder body (5); the bottom plate moves relatively to an inner wall of the cylinder body (5); the hang lever is fixedly connected with the bottom plate after running through the top plate and the rubber elastic layer (3); and a snap-gauge part at the top of a wire clip (6) extends to an inner bottom surface of the cylinder body (5). Through the design of the wire clip, the deadweight loadings of a busbar and a contact line is borne by the bottom plate in the cylinder through the rubber elastic layer, and the bearing area is large, so that the wire clip effectively reduces the abrasion of an overhead rigid contact network and the impact of pantograph, ensures that the pantograph operate more smoothly, has good current collection effect, reduces the wear of the contact line, has high reliability, and prolongs the service life of the contact line; and meanwhile, the parts are particularly convenient to process and install so as to contribute to reducing the construction investment and running costs of the contact networks.

The invention relates to a UPS device and a power supply switching control method thereof. When an output voltage of a UPS module is normal, an output voltage of an output end is an inversion voltage output by the UPS module; when the output voltage of the UPS module has a fault, the output voltage of the output end is a bypass voltage; and when the output voltage of the UPS output module is recovered to a normal state, the output end is switched into the UPS module for output. The switching device disclosed by the invention is added with a silicon controlled rectifier driving circuit, so that generation of an arc in the on-off process of a contactor is effectively eliminated, an instantaneous short circuit of a bypass input and a UPS input in the switching process is prevented, stability and reliability of UPS power supply are effectively improved, a speed of switching to bypass power supply is ensured, and meanwhile, the service life of an electrical component is prolonged.

The invention relates to a method and a device for prolonging the working life of a relay, which belong to the fields of a relay technology, a control component technology and an electronic circuit technology. The method is characterized in that both ends of a control contact of the relay are connected with an electronic switch in parallel, and the electronic switch which is connected with the contact in parallel is switched on before the switching-off moment of the contact; after the contact is switched on, the electronic switch is switched off; and the input end of the electronic switch and the detection end of a control relay coil are both connected on a control loop of the relay in series. The device is formed by connecting a relay, an optical coupling electronic switch, a light emitting diode, a resistor, a two-way diode, a triode, a control voltage end and a relay coil. The invention has the following beneficial effects: because the invention uses the modes of serial connection and parallel connection simultaneously to achieve the aim of controlling the switching-on and the switching-off of the electronic switch and the relay, the formation of electric arcs is prevented, and the damage of the metal contact of the relay is avoided, thereby prolonging the working life of the relay.

The invention relates to the technology of alternating current voltage stabilizers, in particular to a self-adaptive fire-arc-removing relay control method applied to voltage stabilizers. The control method comprises the steps that input voltage and output voltage are subjected to zero-cross detection in real time, timing is carried out on the off action time of all relays, and delaying, regulation and control are carried out on output signals of a relay control module. The self-adaptive fire-arc-removing relay control method aims at being capable of accurately capturing an alternating current zero moment, accurately calculating the on time of different relays and making contacts of different relays exactly at the alternating current zero-cross moment at the off moment in the working process. Compared with the prior art, the input and output voltage zero positions can be more accurately judged; the fire arc phenomenon generated by closing of the relays in the on-load voltage stabilizing process of alternating current voltage stabilizers is eliminated, the control effect of relays is improved, the voltage stabilizing precision is improved, and the service life of voltage stabilizers is prolonged.

The invention discloses a load controller for an elevator and a frequency converter for the elevator. The scheme comprises a driving circuit, a turn-off electronic switch and a detection circuit, wherein the turn-off electronic switch is turned on or turned off through the driving circuit; the turning on or turning off condition of the turn-off electronic switch is inspected through the detection circuit. The load controller and the frequency converter have the advantages that the turn-off electronic switch replaces a traditional contactor, the noise produced during the operation of the contactor is eliminated, arc discharge can not occur during turning on and turning off, the equipment size is reduced, the service life is longer, the reliability is better, the turning on and turning off process can also be controlled by controlling the duty ratio of the turning on and turning off of the turn-off electronic switch, requirements of rear terminal load electrical characteristics are met, and regulable functions which can not be realized by the traditional contactor are realized.