VARIABLE-CLASS AMPLIFIER, SYSTEM, AND METHOD

• US 20140210551A1
• Filed: 03/27/2014
• Published: 07/31/2014
• Est. Priority Date: 04/18/2011
• Status: Active Grant

• Current Assignee: AES Global Holdings Pte Ltd. (Advanced Energy Industries, Inc. (China))
• Original Assignee: Advanced Energy Industries Incorporated
• Inventors: Mueller, Michael
• Granted Patent: US 9,225,299 B2
• Time in Patent Office: Days
• US Class Current: 330/277
• CPC Class Codes: H02P 9/105 for increasing the stability
• CPC Class Codes: H03F 1/56 Modifications of input or output impedances, not otherwise provided for
• CPC Class Codes: H03H 7/40 Automatic matching of load impedance to source impedance

Abstract

A method and generator for modifying interactions between a load and the generator are described. The method includes applying output power to the load using a power amplifier, controlling a level of the output power responsive to a power control setting, and adjusting a conduction angle of the power amplifier to reduce a level of sensitivity of the power amplifier to variations of an impedance of the load. The generator includes a compensation subsystem coupled to the power amplifier that controls a conduction angle of the power amplifier to enable a sensitivity of the power amplifier to be adjusted.

Claims

1. An apparatus, comprising:

an output to apply output power to a load responsive to a power control signal and a reference signal;

a power control system that adjusts the power control signal based upon a power set point and the output power; and

a compensation subsystem controlling a class of the power amplifier to enable a sensitivity of the power amplifier, to variations in an impedance of the load, to be adjusted.