Exemplary embodiments are directed to wireless power transmission scheduling. A method may include scheduling for transmission of wireless power to one or more chargeable devices of the plurality of chargeable devices positioned within a charging region of a wireless charger based on at least one attribute associated with at least one of the wireless charger and at least one chargeable device of the plurality of chargeable devices.

Wireless power transmission scheduling

An electronic battery tester for testing a storage battery includes test circuitry configured to provide a battery test output related to a condition of the battery A memory stores a battery tester address of the battery tester, and communication circuitry transmits the battery test output formatted with the battery tester address on a communication link to a remote location

Electronic battery tester with network communication

A battery pack is provided including universal battery modules and a master control module. By selecting proper rated universal battery modules and connecting them either in series and/or parallel, a high performance and long life battery pack is assembled that is suitable for high power applications such as electrical vehicles whereby the master control module acts as the battery pack control and interface module.

Universal battery module and controller therefor

A method and apparatus for welding include initiating a pulse welding process includes initiating a welding arc by providing CC type welding power, maintaining the arc by providing CV type power. Then, pulse type welding power is provided. The method and system can be used to start short circuit, or other welding processes by providing short circuit power, or welding power of a given mode, instead of providing pulse power. Also, in one alternative, a method and system of initiating a pulse, short circuit, or given welding process includes initiating a welding arc by providing CC type welding power at least until a pseudo-equilibrium for the arc is established. Then, providing welding power in a pulse, short circuit, or the given mode.

Method and apparatus for welding

A welding power supply includes an input rectifier that receives sinusoidal or alternating line voltage and provides a rectified voltage. A pre-regulator provides a dc bus and a convertor, such as a boost convertor, provides a welding output. The pre-regulator is an SVT (slow voltage transition) and an SCT (slow current transition) switched convertor. It may include a snubber circuit having a diode that is SVT switched. Also, the boost convertor may be SVT and SCT switched. The pre-regulator preferably includes a power factor correction circuit. The power source includes, in one embodiment, an inverter having a snubber circuit having a first switch in anti-parallel with a first diode, and a second switch in anti-parallel with a second diode. The first switch and first diode are connected in series with the second switch and the second diode, and the first and second switches are connected in opposing directions, to form a switched snubber.

Power convertor with low loss switching

The present invention is directed to a remotely controlled welding machine. A remote control uses the welding circuit to transfer information to a welding power source. The information to be communicated to the power source includes welding power source output command information (amperage/voltage control), welding circuit on/off information (power source output contactor control), and power source mode control (constant voltage/constant current). A transmitter transmits the desired welding operational parameters to a receiver disposed in the power source. The transmitter is constructed to use only a small amount of power which, preferably, is supplied by one or two low voltage replaceable and/or rechargeable batteries. Additionally, an open circuit voltage is not created between the power source and an electrode holder when an arc is not present.

Remotely controlled welding machine

A method and apparatus for charging batteries includes using an input rectifier to receive an ac input and provide a dc signal. A converter receives the dc signal and provides a converter output. An output circuit receives the converter output and provides a battery charging signal. A controller preferably controls the converter to power factor correct. The system can include multiple output circuits, used either singly or at the same time, and designed for one or more voltages. They can be user removable. Preferably, the converter output has a magnitude independent of a range of frequencies and a range of magnitudes of the ac input, and the range can be, for example, at least a factor of two or at least two utility voltages. The controller includes a charging schedule module that receives feedback, such as voltage and/or current feedback and/or temperature feedback. The output circuit, such as a dc-dc converter, is controlled in response to the feedback in other embodiments. The battery type may be sensed or input by a user, and the charging done in response to the battery type. A defective battery sensor is preferably included, with a user-noticeable indicator.

Method and apparatus for charging batteries

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

An inverter power supply for use with various voltage inputs is provided. The inverter power supply generally receives 208 VAC single-phase, 208 VAC three-phase, 230 VAC three-phase, 230 VAC single-phase, 460 VAC single-phase, or 460 VAC three-phase power and provides a DC output current for welding, heating or cutting applications. The power inverter circuit includes a first tank circuit and a second tank circuit which are configured in serial or parallel according to a particular voltage input. Contactors, relays, or semiconductor switches respond to control signals from an AC sense circuit in order to configure the inverter power supply for the appropriate voltage input.

Power selection and protection circuit responsive to an input voltage for providing series or parallel connected inverters

An arc welding machine is disclosed for providing a continuous feed electrode to a weld site. The arc welding machine includes a line frequency transformer having a primary winding, a first secondary winding, and a second secondary winding (e.g., an extension winding, a separate winding, etc.). The first secondary winding provides a welding power having a first voltage at a welding power output terminal. The second secondary winding provides a second welding power having a second higher voltage at an input terminal of a switch, the switch being controlled to provide a pulsed power at the welding power output terminal. According to one feature, the arc welding machine produces a pulsed power having a fixed pulse width and a fixed frequency, the fixed pulse width and fixed frequency being substantially free of operator adjustment.

Jon O. Reynolds

Papers

Remotely controlled welding machine

Method and apparatus for charging batteries

Portable welding-type apparatus with interchangeable energy storage device

Power selection and protection circuit responsive to an input voltage for providing series or parallel connected inverters

Welding power supply for pulsed spray welding