The disclosure features apparatus, methods, and systems for wireless power transfer that include a power source featuring at least one resonator, a power receiver featuring at least one resonator, a first detector featuring one or more loops of conductive material and configured to generate an electrical signal based on a magnetic field between the power source and the power receiver, a second detector featuring conductive material, and control electronics coupled to the first and second detectors, where during operation, the control electronics are configured to measure the electrical signal of the first detector and compare the measured electrical signal of the first detector to baseline electrical information for the first detector to determine information about whether debris is positioned between the power source and the power receiver.

Foreign object detection in wireless energy transfer systems

Wireless vehicle charger safety systems and methods use a detection subsystem, a notification subsystem and a management subsystem. The detection subsystem identifies a safety condition. The notification subsystem provides an indication of the safety condition. The management subsystem addresses the safety condition. In particular, undesirable thermal conditions caused by foreign objects between a source resonator and a vehicle resonator are addressed by sensing high temperatures, providing a warning and powering down a vehicle charger, as appropriate for the environment in which the charger is deployed.

Vehicle charger safety system and method

An electric vehicle charging system includes a portable housing having an integral holder to hold a connector for an electric vehicle supply circuit. An electric vehicle supply equipment enclosure includes an integral chamber to store all or part of a cord. A mounting bracket for an electric vehicle supply equipment enclosure covers an open portion of the enclosure. A method for facilitating use of an electric vehicle includes providing a prewiring kit for the electric vehicle. An electric vehicle supply equipment enclosure includes an integral disconnect switch. An electric vehicle supply circuit includes a grounding monitor circuit having automatic test functionality. Another electric vehicle supply circuit includes a contact monitor circuit to monitor the state of one or more of the contacts.

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Electric vehicle supply equipment

An operation managing server for charging stations each of which has a charger and accepts a charging request for charging a vehicle battery of a user through the charger at a charging station, including a charging request accepting unit that accepts a charging request from a user when the user makes the charging request, and a charging time estimating unit that estimates a charging time required to charge the vehicle battery of the user on the basis of past charger using data of the user, wherein when there is any charging request from a next user, the charging request accepting unit accepts the charging request concerned while reflecting the estimated charging time of the former user.

Operation managing server for charging stations and operation managing system for charging stations

A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal, a network of switches switched at a high frequency with a given duty cycle to convert the input into a first internal AC signal, an isolation transformer with a primary winding driven by the first internal high frequency AC signal and a secondary winding for creating a second internal high frequency AC signal and a rectifier to convert the second internal AC signal into a second DC output signal of the second stage, with a magnitude related to the duty cycle of the switches; and, a third stage to convert the second DC output signal to a welding output for welding wherein the input stage has a regulated DC to DC converter with a boost power switch having an active soft switching circuit.

Three stage power source for electric ARC welding

A method and apparatus provides welding-type power and preferably includes a removable battery or other energy storage device, a converter connected to the battery, and a controller. The controller may have a CV and/or a CSC and/or an AC weld control module, and/or an ac auxiliary control module. The converter is a boost converter, a buck converter, a cuk converter, a forward converter, an inverter, a bridge converter, and/or a resonant converter. The controller may include a battery charging control module, and may have one or more charging schedules, and/or data for stored charge, thermal information, expected life of the battery, maximum amp-hour charge for the battery, maximum charging current and/or feedback. The battery charging schedules may include at least 3 phases, such as a phase of increasing voltage and a phase of decreasing current, a substantially constant power phase. The controller can wirelessly provide data to a display or pda. A generator may provide power to the battery, charger, and/or the weld. It can include a vehicle and use its dc power system.

Method and apparatus for welding with battery power

A welding power supply including power conversion circuitry adapted to receive a primary source of power, to utilize one or more power semiconductor switches to chop the primary source of power, and to convert the chopped power to a welding output is provided. The provided welding power supply includes a pulse width modulated (PWM) digital controller including gate drive circuitry that generates a PWM output signal that controls the switching of the one or more power semiconductor switches. The PWM output signal includes a duty cycle term corrected for one or more sources of error in the welding system.

Welding power supply with digital control of duty cycle

The present invention is directed to a portable welding-type power source including a removable energy storage device configured to provide a first voltage output and a boost circuit connected to the energy storage device and configured to boost the first voltage output to a second voltage output to supply power to the welding-type power source according to a selected welding-type process.

Portable welding-type apparatus with interchangeable energy storage device

Systems, devices, and methods for measuring a peak to peak switching ripple in a voltage present on welding output terminals are provided. The systems, devices, and methods may also be utilized to determine, during a welding operation, a weld cable inductance based on the measured peak to peak voltage ripple.

Systems and devices for determining weld cable inductance

The present invention is directed to a MIG welding machine having a 115 volt inverter. Incorporation of the 115 volt inverter into the MIG welding power source reduces the weight of the power source thereby increasing its portability. The power source may include a power factor correction circuit to provide a near-unity power factor such that output power of the inverter is more efficiently provided. Additionally, the 115 volt inverter is constructed such that for short periods of time, the inverter may output power at a level that exceeds its power rating.

Bernard J. Vogel

Papers

Method and apparatus for welding with battery power

Welding power supply with digital control of duty cycle

Portable welding-type apparatus with interchangeable energy storage device

Systems and devices for determining weld cable inductance

Mig welding machine having 115v inverter