Patents by Inventor Stephen John MacKay

Stephen John MacKay 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).

  • Power converter control loop
    Patent number: 6421257
    Abstract: An apparatus for and method of control of a switch (102) in an electrical power converter (100) using pulse width modulation to regulate output voltage (112) and current The method allows precise output voltage regulation to be achieved whilst accurately controlling the proportion of load-current supplied by multiple modules connected in parallel. A ramped waveform (408), consisting of a component representing the instantaneous current and a component representing the input voltage applied since the switch (102) switched on in the current PWM cycle, is compared with an error signal (406) to determine the width of each PWM pulse.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: July 16, 2002
    Assignee: Oxford Magnet Technology Limited
    Inventors: Stephen John MacKay, Stephen Berry
  • Power converter control loop
    Publication number: 20010038542
    Abstract: An apparatus for and method of control of a switch (102) in an electrical power converter (100) using pulse width modulation to regulate output voltage (112) and current. The method allows precise output voltage regulation to be achieved whilst accurately controlling the proportion of load-current supplied by multiple modules connected in parallel. A ramped waveform (408), consisting of a component representing the instantaneous current and a component representing the input voltage applied since the switch (102) switched on in the current PWM cycle, is compared with an error signal (406) to determine the width of each PWM pulse.
    Type: Application
    Filed: February 12, 2001
    Publication date: November 8, 2001
    Inventors: Stephen John MacKay, Stephen Berry