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Ameritherm, Inc. Patents
Assignee:
Ameritherm, Inc.
Address:
Scottsville, NY
No. of patents:
21
Patents:












Patent Number Title Of Patent Date Issued
8283985 Automatic frequency compensation for pulse width modulated RF level control October 9, 2012
Preferred embodiments of the present invention provide systems and methods that automatically correct the desired on-time of switching elements as the resonant frequency changes, so as to maintain the correct proportional value.
8269532 Constant phase angle control for frequency agile power switching systems September 18, 2012
Power switching systems often benefit from controlling the instant at which the power devices change state so as to minimize dissipation in these devices. Such systems often require fairly tight tolerances on reactive components and a relatively narrow frequency operating range to be
7995362 High voltage full bridge circuit and method for operating the same August 9, 2011
A circuit apparatus for providing an AC voltage to a load. The apparatus may include: a first, second, third and fourth switch, wherein the first switch is connected between a first node and a first terminal of the second switch and the fourth switch is connected between a second node
7906997 Constant phase angle control for frequency agile power switching systems March 15, 2011
Power switching systems often benefit from controlling the instant at which the power devices change state so as to minimize dissipation in these devices. Such systems often require fairly tight tolerances on reactive components and a relatively narrow frequency operating range to be
7829827 Radio frequency (RF) induction cooking food heater November 9, 2010
In one aspect, the present invention provides a consumer appliance that uses RF energy to heat foods stored in a container that is suitable for RF heating.
7804045 Portable food heater September 28, 2010
In one aspect, the present invention provides a consumer appliance that uses RF energy to heat foods stored in a container that is suitable for RF heating.
7787268 Power switching system to increase induction heating to a load from available AC mains power August 31, 2010
In one aspect, the invention provides a power system for providing power to a load. In some embodiment, the system comprises: a rectifier configured to rectify an AC main signal to produce a rectified AC main signal; a zero cross detector configured to receive the AC main signal and
7626463 Automatic frequency compensation for pulse width modulated RF level control December 1, 2009
Preferred embodiments of the present invention provide systems and methods that automatically correct the desired on-time of switching elements as the resonant frequency changes, so as to maintain the correct proportional value.
7551011 Constant phase angle control for frequency agile power switching systems June 23, 2009
Power switching systems often benefit from controlling the instant at which the power devices change state so as to minimize dissipation in these devices. Such systems often require fairly tight tolerances on reactive components and a relatively narrow frequency operating range to be
7489530 High voltage full bridge circuit and method for operating the same February 10, 2009
Switches (such as FET's and other devices) are often used in circuits to generate an AC signal from a DC supply input. There are times when the supplied DC voltage is greater than desired for the ratings of the switches that can or must be used. There are also times when there may be
6861629 Induction furnace for heating a workpiece in an inert atmosphere or vacuum March 1, 2005
An induction furnace, according to one embodiment of the invention, includes an induction heating system and a chamber that comprises a quartz cylinder, a top cover for sealing the top end of the cylinder, and a bottom cover for sealing the bottom end of the cylinder. The induction h
6730894 Resonant frequency tracking system and method for use in a radio frequency (RF) power supply May 4, 2004
An RF power supply that is capable of tracking rapid changes in the resonant frequency of a load and capable of quickly responding to varying load conditions so as to deliver the desired amount of power. The present invention also provides an RF power supply capable of delivering a wide
6664881 Efficient, low leakage inductance, multi-tap, RF transformer and method of making same December 16, 2003
A low leakage inductance, versatile RF transformer with multiple input/output voltage ratios. The transformer has many applications. For example, and not by way of limitation, the transformer can be used with switching power supplies, RF induction power supplies, and RF plasma power
6521874 RF power supply February 18, 2003
An RF power supply that is capable of tracking rapid changes in the resonant frequency of a load and capable of quickly responding to varying load conditions so as to deliver the desired amount of power. The present invention also provides an RF power supply capable of delivering a wide
6359267 Induction heating system March 19, 2002
An induction heating system that can be used to braze metals and that overcomes many of the disadvantages of conventional brazing systems. The induction heating system improves quality and lowers production cost for many brazing requirements. The system is designed to quickly, accurately
6348679 RF active compositions for use in adhesion, bonding and coating February 19, 2002
A susceptor composition that can bond two or more layers or substrates to one another and that can be used to coat or cut a substrate. The susceptor composition is activated in the presence of radio frequency (RF) energy. In one embodiment, the susceptor composition of the present invent
6316756 Resonant frequency tracking system and method for use in a radio frequency (RF) power supply November 13, 2001
A radio frequency (RF) power system for providing RF power to a load. The RF power system comprises a tank circuit; a direct current (DC) voltage source that provides a DC voltage within a first predetermined range; an amplifier, coupled to said DC voltage source, to provide an alternati
6271508 System and method for providing RF power to a load August 7, 2001
An RF power supply that is capable of tracking rapid changes in the resonant frequency of a load and capable of quickly responding to varying load conditions so as to deliver the desired amount of power. The present invention also provides an RF power supply capable of delivering a wide
6255635 System and method for providing RF power to a load July 3, 2001
An RF power supply that is capable of tracking rapid changes in the resonant frequency of a load and capable of quickly responding to varying load conditions so as to deliver the desired amount of power. The present invention also provides an RF power supply capable of delivering a wide
6157258 High frequency power amplifier December 5, 2000
A power amplifier that provides wide-band, high efficiency, high voltage, HF power amplification over a large dynamic operating range. In one embodiment, the power amplifier includes a driver amplifier, an intermediate power amplifier comprising a coherently combined array of two tra
6072362 System for enabling a full-bridge switch-mode amplifier to recover all reactive energy June 6, 2000
A full-bridge amplifier that is able to provide power to all types of loads. The fill-bridge amplifier according to the present invention recovers reactive energy produced by capacitive loads instead of having the reactive energy be dissipated in the switches of the amplifier, thereb

 
 
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