Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2006-08-31
2008-03-11
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S801000, C318S799000, C318S800000, C318S808000, C318S809000, C318S811000
Reexamination Certificate
active
07342380
ABSTRACT:
A system and method for controlling an inverter of a motor control unit includes a controller having a user interface configured to allow user selection of a waveform increment value or a waveform amplitude threshold. The controller also includes an integrator configured to receive the waveform increment value and generate a signal at least based on the waveform increment value. A logic circuit is configured to monitor the signal and reset the integrator when the signal reaches the waveform amplitude threshold to generate a waveform having a frequency-independent amplitude. A comparator compares the waveform to a modulating signal to trigger gating pulses delivered to an inverter to drive an associated motor.
REFERENCES:
patent: 3971972 (1976-07-01), Stich
patent: 5013931 (1991-05-01), Estes, Jr.
patent: 6617821 (2003-09-01), Kerkman et al.
patent: 6819077 (2004-11-01), Seibel et al.
Kerkman Russel J.
Leggate David
Radosevich Richard H.
Brandt Michael
Donovan Lincoln
Kuszewski Alexander R.
Rockwell Automation Technologies Inc.
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