2813 results about "Current loop" patented technology

A system for monitoring and configuring gaming devices interconnected over a high-speed network is disclosed. The system can support a file server, one or more floor controllers, one or more pit terminals, and other terminals all interconnected over the network. Each gaming device includes an electronic module which allows the gaming device to communicate with a floor controller over a current loop network. The electronic module includes a player tracking module and a data communication node. The player tracking module includes a card reader for detecting a player tracking card inserted therein which identifies the player. The data communication node communicates with both the floor controller and the gaming device. The data communication node communicates with the gaming device over a serial interface through which the data communication node transmits reconfiguration commands. The gaming device reconfigures its payout schedule responsive to the reconfiguration commands to provide a variety of promotional bonuses such as multiple jackpot bonuses, mystery jackpot bonuses, progressive jackpot bonuses, or player specific bonuses.

An implantable battery powered leadless pacemaker or biostimulator is provided that may include any of a number of features. One feature of the biostimulator is that it safely operates under a wide range of MRI conditions. One feature of the biostimulator is that it has a total volume small enough to avoid excessive image artifacts during a MRI procedure. Another feature of the biostimulator is that it has reduced path lengths between electrodes to minimize tissue heating at the site of the biostimulator. Yet another feature of the biostimulator is that a current loop area within the biostimulator is small enough to reduce an induced current and voltage in the biostimulator during MRI procedures. Methods associated with use of the biostimulator are also covered.

A first flux-loop inductive coupler element electrically couples with a second flux-loop inductive coupler element. The first flux-loop inductive coupler element comprises a first ring-like core having high magnetic permeability and a conical-section annular first face transverse to the plane of the first core. The first face has a first annular groove separating a first conical-section larger-diameter face and a first conical-section smaller-diameter face. A first coil is wound within the annular groove. The first and second cores form a low-reluctance closed magnetic path around the first coil and a second coil of the second flux-loop inductive coupler element.A first current-loop inductive coupler element electrically couples with a second current-loop inductive coupler element. The first current-loop inductive coupler element has a first high-conductivity, low-permeability shaped belt of a first end of a first pipe joint, a first ring-like core located at the first end, and a first electrically conductive coil wound about the first ring-like core. The first high-conductivity, low-permeability shaped belt partially encloses the first coil. It is shaped to cooperate with the second high-conductivity, low-permeability shaped belt of an adjacent second pipe joint having a second electrically conductive coil and a second high-conductivity, low-permeability shaped belt to create a closed toroidal electrical conducting path. The closed toroidal electrical conducting path encloses the first coil and the second coil when the first and second pipe joints are mated.

System and method for processing a safety signal in an autonomous vehicle. Safety signals are typically generated in response to the detection of unsafe conditions or are sent by the vehicle operator. In either case, the safety signals are conveyed using redundant communication paths. The paths include a computer network and a current loop. The safety signals are processed, thereby causing actuators (e.g., linkages) to manipulate input devices (e.g., articulation controls and drive controls, such as a throttle, brake, tie rods, steering gear, throttle lever, accelerator, or transmission shifter). The manipulation ensures the vehicle responds appropriately to the safety signals, for example, by shutting down the vehicle.

A fly-back power converter has a current-estimating control loop that senses the primary output current in a transformer to control the secondary output. A primary-side control circuit switches primary current through the transformer on and off. A discharge time when a secondary current through an auxiliary winding of the transformer is flowing is generated by sampling a voltage divider on an auxiliary loop for a knee-point. A normalized duty cycle is calculated by multiplying the discharge time by a current that is proportional to the switching frequency and comparing to a sawtooth signal having the switching frequency. The peak of a primary-side voltage is sensed from the primary current loop and converted to a current and multiplied by the normalized duty cycle to generate an estimated current. An error amp compares the estimated current to a reference to adjust the oscillator frequency and peak current to control primary switching.

A single pair of polarity independent wires conveys electrical power and two-way communication between a remote thermostat and a temperature-conditioning unit. The system is functional even if the wires are crossed, so mis-wiring is nearly impossible. The system is selectively operable in three independently distinct modes: a power mode for conveying electrical power from the temperature-conditioning unit to the thermostat, an output mode for transmitting a communication signal from the temperature-conditioning unit to the thermostat, and a feedback mode for conveying a communication signal from the thermostat to the temperature-conditioning unit. When the power mode is inactive during the output mode and feedback mode, the thermostat relies on electrical power that the thermostat stored during a previous power mode. Communication is provided by a current loop circuit that is generally immune to electrical noise and tolerant of wire impedance.

A single stage switch mode power converter receives a supply line voltage and a supply line current from a power supply line, and provides one or more regulated output voltages for a load, such as an amplifier. The power converter is operable to regulate the output voltage(s) using a controller that includes a voltage controlled current loop. The controller can enable substantially constant supply line current to be drawn from the power supply line by selectively allowing conduction of the supply line current through the power converter. A power factor of the supply line voltage and the supply line current may be optimized by the controller at medium to high power levels thereby maximizing the power provided to the switch mode power converter from the power supply line. Due to the adaptive nature of the controller, the power converter can operate over a wide range of supply line voltage.

An atomizer switch device provided in a disposable electronic cigarette comprises a key-switch (1), a battery (3) and a heating unit (2). The key switch (1) is provided on the housing of the disposable electronic cigarette and connected in series in the current loop comprising the battery (3) and the heating unit (2). The cost of the disposable electronic cigarette is decreased by using the atomizer switch device.

An illumination system includes a master power supply providing power to several illumination modules. The master power supply is constructed and arranged to generate high-frequency and low-voltage electrical power provided to a primary wire forming a current loop. Each illumination module includes an electromagnetic coupling element and several light sources. The electromagnetic coupling element includes a magnetic core arranged to receive the current loop in a removable arrangement, and a secondary wire wound around the magnetic core to enable inductive coupling. The secondary wire is connected to provide current to the light sources that may be arranged in the illumination module as a DC load or an AC load.

Methodologies and structures are disclosed for providing multilayer electronic devices having low inductance and high ratings, such as for capacitor devices for uses involving faster pulsing and higher currents. Plural layer devices are constructed for relatively lowered inductance by relatively altering typical orientation of capacitors such that their electrodes are placed into a vertical position relative to an associated circuit board. Optionally, individual leads may be formed so that the resulting structure can be used as an array. Internal electrodes may be arranged for reducing current loops for associated circuits on a circuit board, to correspondingly reduce the associated inductance of the circuit board mounted device. Leads associated with such devices may have added tab-like structures which serve to more precisely place the lead, to improve the lead to capacitor strength, and to promote lower resistance and inductance. Disclosed designs for reducing associated inductance may be practiced in conjunction with various electric devices, including capacitors, resistors, inductors, or varistors.

A digital current-mode controller for a DC-DC converter is disclosed. The controller comprises a digital current reference; and a current loop compensator adapted to receive a digital current error signal derived from a digital current sample sensed from the DC-DC converter and the digital current reference and to generate a duty-cycle command, wherein the current loop compensator comprises a low-pass filter that is used in generating the duty-cycle command. A DC-DC regulator comprising a digital current-mode controller and a method of controlling a DC-DC converter are also disclosed.

The invention discloses a charging system for an unmanned aircraft. The charging system is characterized by comprising a power-taking device, an electric energy transmitting device, an electric energy receiving device and an aircraft-mounted battery, wherein an overhead transmission line is arranged on the power-taking device; the electric energy transmitting device is for converting power frequency alternating current into high-frequency alternating current; the electric energy receiving device is arranged on the unmanned aircraft; electric energy transmission is realized in a wireless manner between the electric energy receiving device and the electric energy transmitting device; the aircraft-mounted battery is arranged on the unmanned aircraft, is used for supplying power to the unmanned aircraft, and is connected in series to a current loop of the electric energy receiving device. Compared with the prior art, an electric unmanned aircraft charging system based on an alternating-current power transmission overhead line provided by the invention has the advantages that a full-autonomous and safe charging way is realized for the unmanned aircraft, and the distance per charge of the unmanned aircraft is prolonged. Meanwhile, a high-frequency inductive constant-current charging circuit based on an unstable alternating-current power supply is provided, so that unmanned charging operation is fully realized, the dependence of the unmanned aircraft on a ground base or a mobile base station is reduced, labor operation is reduced, and labor cost is reduced.

An antenna apparatus including a metal layer, a first planar antenna, a second planar antenna and a conducting wire is provided. The first planar antenna has a first ground terminal electrically connected to the metal layer. The second planar antenna has a second ground terminal electrically connected to the metal layer. The conducting wire is connected between the first planar antenna and the second planar antenna. In the whole operation, electromagnetic signals transmitted by the first planar antenna and the second planar antenna are in the same frequency band, and the coupling effect of the first planar antenna and the second planar antenna is reduced along with the formation of a current loop of the conducting wire.

A driving circuit uses a plurality of transformers to provide currents for driving a plurality of LEDs associated with a plurality of current paths. Each transformer has two induction coils with a coil turn ratio between to the number of turns in each induction coil. One induction coil is used to provide an output current to a different current path and the other induction coil is connected to the corresponding induction coil of other transformers for forming a current loop. The output current of each transformer has a relationship with the output current of the other transformers depending on the coil turn ratios of the connected transformers. LEDs in red, blue and green colors can be connected to different current paths so that the brightness of the LEDs in each color can be determined by the current in a current path.

An excessive voltage protection system for a variable frequency generating system detects single point failures in a generator control unit and prevents excessive voltages at a point of regulation (POR) in the system. The generator control unit is designed to detect failures, such as a loss of three-phase sensing capability, switch failure in the exciter drive circuit, and / or exciter current loop failure. If a failure occurs, the generator control unit stops operation of the exciter drive circuit, preventing the voltage at the POR from rising to undesirable levels.

An electromagnetic survey method for surveying an area of seafloor that is thought or known to contain a subterranean hydrocarbon reservoir, comprising obtaining a first survey data set with a vertical electric dipole (VED) antenna for generating vertical current loops and a second survey data set with a vertical magnetic dipole (VMD) antenna for generating horizontal current loops. In an alternative embodiment, the VMD antenna is dispensed with and the horizontal electromagnetic field is derived from the naturally occurring magnetotelluric (MT) electromagnetic field. In another alternative embodiment, the VED data is compared with a background geological model instead of VMD or MT data. The invention also relates to a survey apparatus comprising VED and VMD antennae, to planning a survey using this method, and to analysis of survey data taken using this survey method. The first and second survey data sets allow the galvanic contribution to the detector signals collected at a detector to he independently contrasted with the inductive effects. This is important to the success of using electromagnetic surveying for identifying hydrocarbon reserves and distinguishing them from other classes or structure.

The invention relates to an estimation and compensation method for unbalanced moment of an aerial remote sensing inertially stabilized platform, which comprises the following steps: estimating the unbalanced moment of the platform according to the acceleration of the platform and the current information of a moment motor measured in real time; then calculating the current value of the moment motor required for offsetting the unbalanced moment; and compensating the current value on current setting of a current loop of the moment motor, so that the moment motor outputs resisting moment which is of equal size and in opposite direction to the unbalanced moment to inhibit the disturbance of the unbalanced moment of the stable platform, reduce the requirement for the moment rigidity of the stabilized platform and increase the stabilization accuracy of the stabilized platform. The invention has the characteristics of good stability and high precision and is suitable for aerial remote sensing inertially stabilized platforms with unbalanced moment for tracking the local geographical level.

The invention relates to an electroplastic incremental forming device and an electroplastic incremental forming method for plates. The device comprises a five-axis numerical control forming machine tool, a six-axis parallel robot machining system, a plate forming clamp, a high energy pulse power supply, an infrared thermometer, and a compressed air cooling system embedded in the machine tool, wherein an upper forming pressing head is arranged at the tail end of a spindle of the five-axis numerical control forming machine tool; the six-axis parallel robot machining system is arranged on a working table of the machine tool; the top of the six-axis parallel robot machining system is provided with a lower forming pressing head; the plate forming clamp is fixed on the working table of the machine tool; positive and negative poles of the high energy pulse power supply are connected with the upper forming pressing head and the lower forming pressing head through high current-carrying conductors respectively so as to form a current loop among the high energy pulse power supply, the upper forming pressing head, the lower forming pressing head and the plates; a camera of the infrared thermometer is aligned with a central area of each plate; and the compressed air cooling system is aligned with a forming area of each plate. Compared with the prior art, the invention has the advantages of high efficiency, energy conservation, high machining precision, high surface quality and the like.

The invention discloses a permanent magnet motor system with a shared bus structure and an open winding. The permanent magnet motor system comprises a permanent magnet synchronous motor, two current inverters, a direct-current power supply and a controller. The permanent magnet synchronous motor is of an open winding structure. The current inverters are voltage source type three-phase full-bridge inverters. The direct-current sides of the two current inverters are connected to the same direct-current power supply. Due to the fact that the direct-current sides of the two current inverters are connected directly, three current loops are formed in the structure. The invention further discloses a control method for suppressing a zero-sequence current of the permanent magnet motor system. According to the control method, a voltage compensator is designed for correcting the given voltage of the current inverters so that the zero-sequence current can be reduced substantially. According to the permanent magnet motor system, since the two current inverters share the same direct-current power supply, the structure is simple, cost is low, and operating performance and efficiency are high under the condition that the zero-sequence current is well suppressed.

The invention provides a non-isolated grid-connected inverter and a switch control time sequence thereof. The non-isolated grid-connected inverter comprises a voltage dividing capacitor branch (1), a clamping branch (2) and a full-bridge basic unit (3), wherein the voltage dividing capacitor branch (1) consists of a first voltage dividing capacitor (Cdc1) and a second voltage dividing capacitor (Cdc2), the clamping branch (2) consists of a first power switch pipe (S1) and a second power switch pipe (S2), and the full-bridge basic unit (3) consists of a third power switch pipe (S3), a fourth power switch pipe (S4), a fifth power switch pipe (S5) and a six power switch pipe (S6). The invention adds two controllable switch pipes and voltage dividing capacitors on the basis of a full-bridge circuit for forming a bidirectional clamping branch, is matched with the switch time sequence, and can realize the battery voltage at a half of the follow current loop potential in the follow current stage, so the leakage current of the non-isolated grid-connected inverter is eliminated, the output current only passes through three switch pipes in the power transmission stage is ensured, and the conduction consumption is effectively reduced.

A full-bridge rectifier is configured to provide synchronous rectification with either a current-source or a voltage-source. The rectifier has an upper branch and a lower branch and two current loops, with each of the branches including voltage- or current-controlled active switches, diodes or combinations thereof that are selected such that each loop includes one active switch or diode from the upper branch and one active switch or diode from the lower branch, and each current loop comprises at least one diode or current-controlled active switch, and at least one voltage- or current-controlled active switch is included in one of the upper or lower branches.

The invention discloses a grid-connected current control method for a combined single-phase two-stage photovoltaic generation system. The single-phase photovoltaic generation system is of a two-stage structure and comprises a first-stage BOOST up circuit link and a second-stage single-phase full-bridge inverter circuit link. The single-phase full-bridge inverter circuit link adopts a double-closed-loop control strategy and comprises an outer loop which is a direct-current bus voltage loop and an inner loop which is a grid-connected current loop and further utilizes voltage forward feed control of a power grid. The BOOST up circuit link is used for realizing boosting voltage of a photovoltaic battery module to a direct-current bus voltage reference value while realizing maximum power point tracking. Besides, the single-phase full-bridge inverter circuit link is used for realizing stabilization of the direct-current bus voltage and synchronization of frequency and phase of system output current and voltage of the power grid. The grid-connected current control method for the combined single-phase two-stage photovoltaic generation system has the advantages of excellent stability, flexibility in dynamic response, low content of low-order harmonics, high interference resistance, good robustness, high reliability and the like.

The invention relates to a device and a method of the electrical heating numerical control incremental forming processing of a sheet metal and belongs to the technical field of the sheet metal incremental forming processing. The key points of the device and the method lie in that a large current-carrying wire is used for forming an auxiliary power supply, a forming pressure head, a forming clamp and the sheet metal into a current loop; the power supply provides a low-voltage large current to cause the materials in a processing area to generate joule heat and to be softened in the sheet metal processing and forming so as to ensure the smooth implementation of the incremental forming processing. The heating method is fast in temperature rising, convenient in control and low in price, thus solving the problem that other heating methods are complex to control, improving the processing precision and being favorable for forming complex parts. At the same time, the method is suitable for the incremental processing of sheet metals such as the titanium magnesium sheet metal, and the like, which are hard to be plastically formed at normal temperature.

The present invention relates to the technical field of electrical engineering and discloses a PRBS disturbance injection-based power grid impedance online identification device. The device is mainly composed of a grid-connected inverter, a current loop controller, a sampling device and an impedance identification unit. The device is characterized in that the grid-connected inverter is connected with the current loop controller. When the grid-connected state is stable, the grid-connected inverter injects the PRBS disturbance into the power grid. During the injection process of a PRBS signal, a built-in output voltage THD is fed back to the controller, so that the THD value of the output voltage of the inverter is ensured to be smaller than 5%. The sampling device is connected with the PCC part of the power grid and is used for sampling and recording the voltage and the current at the PCC part of the power grid. The impedance identification unit is used for subjecting the sampled data of the sampling device to DFT analysis, and taking the average value of the amplitude and the average value of the phase of each harmonic component of the voltage and the current during the current sampling period. The method of the invention is high in precision, high in speed, strong in real-time property, wide in frequency range, lower in measuring cost and difficulty, and better in stability.

The invention discloses a bunched electrode high-speed discharge processing method in the technical field of arc discharge processing. A bunched electrode is fixedly connected with a spindle of a machine tool, the end surface of the bunched electrode faces to a workpiece to be processed on an operating platform of the machine tool, and the workpiece can be immersed in a water-based operating fluid provided by a water-based operating fluid supply system; then a fluid loop is formed by the water-based operating fluid supply system, the bunched electrode and a machine tool operating fluid trough, and a current loop is formed by a discharge source, the bunched electrode, the interelectrode broken-down water-based operating fluid and the workpiece to be processed; the water-based operating fluid between the bunched electrode and the workpiece to be processed is circulated through the water-based operating fluid supply system; the bunched electrode is connected with the negative electrode of the discharge source, the workpiece to be processed is connected with the positive electrode of the discharge source, and direct current or pulse current is applied by the discharge source to form short arc discharge, so that the high-speed discharge processing is realized. The invention realizes strengthened high pressure and large flow fluid filling in multiple holes by utilizing the bunched electrode, ensures short arc discharge processing by applying a fluid hydrodynamic force arc-breaking mechanism and is a method capable of simply, conveniently and economically realizing the high-speed discharge processing of the bunched electrode, particularly the processing of curves and mold cavities.