Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Reexamination Certificate
2006-08-01
2006-08-01
Masih, Karen (Department: 2837)
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
C388S800000, C388S804000, C318S139000
Reexamination Certificate
active
07084592
ABSTRACT:
A system includes a motor for producing motion when current is supplied to the motor and a motor controller coupled to the motor for receiving a motor current signal indicative of the current supplied to the motor. The motor controller has an analog-to-digital converter for converting the motor current signal to a sampled motor current signal. The motor controller is operable to detect pulses in the sampled motor current signal, count the detected pulses to generate a first pulse count, and determine a run parameter for the motor based on the first pulse count. A method for controlling a motor includes counting a first plurality of pulses in a motor current signal produced while the motor is activated to generate a first pulse count. A second plurality of pulses is counted in the motor current signal produced while the motor is deactivated to generate a second pulse count. A run parameter for the motor is determined based on the first and second pulse counts.
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Masih Karen
Quarles & Brady LLP
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