Electricity: motive power systems – Positional servo systems – Frequency- or phase-modulated systems
Reexamination Certificate
2007-03-13
2007-03-13
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Positional servo systems
Frequency- or phase-modulated systems
C318S807000, C318S767000, C363S037000, C363S040000, C363S047000, C363S060000, C363S061000
Reexamination Certificate
active
11139216
ABSTRACT:
A method for controlling a device including a plurality of switching devices operated in accordance with a pulse width modulation technique includes receiving a reference voltage signal associated with a first pair of the switching devices. A switching signal is generated. The first pair of switching devices are controlled based on the reference voltage signal and the switching signal in accordance with the pulse width modulation technique. A frequency of the switching signal is varied based on the value of the reference voltage signal.
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Lukaszewski Richard A.
Wei Lixiang
Quarles & Brady LLP
Rockwell Automation Technologies Inc.
Walbrun William R.
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