Patents by Inventor David Stanzel

David Stanzel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20060033476
    Abstract: According to a first aspect of the invention a battery charger and method of charging a battery includes an input circuit that receive an ac input having a period of T seconds and provides a dc signal. A converter receives the first dc signal and provides a converter output across a dc bus having a peak voltage of V volts. An output circuit receives the dc signal and provides a battery charging signal having a power of P watts. A controller, controls the converter to provide power factor correction. A bus capacitor is connected across the dc bus and has a capacitance of at least (3PT)/(V2) farads, or a capacitance to store sufficient energy to maintain the available output power signal through the duration of mechanical transient. The capacitance may be at least (4PT)/(V2), (5PT)/(V2), or (5.5PT)/(V2). Multiple output circuits may be provided, connected either one at a time, or a number at a time.
    Type: Application
    Filed: August 10, 2004
    Publication date: February 16, 2006
    Inventors: Jon Reynolds, David Stanzel
  • Publication number: 20060033473
    Abstract: 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.
    Type: Application
    Filed: August 10, 2004
    Publication date: February 16, 2006
    Inventors: David Stanzel, Jon Reynolds