Fast response motor current regulator
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United States of America Patent
Stats
-
Jan 7, 1992
Issued Date -
N/A
app pub date -
Aug 31, 1989
filing date -
May 23, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
High speed fast response PWM current control regulation methodology and circuitry samples the required peak motor current value from a previous PWM cycle and calculates the required peak motor current value for the present PWM cycle and repeats the sampling and calculating every PWM cycle and updates the new required peak motor current value every PWM cycle. The required peak motor current value for the present PWM cycle is calculated according to the equation I(peak present)=I(command)+0.5I(peak last)-0.5I(turn-on), where I(peak present) is the required peak motor current value for the present PWM cycle, I(command) is the commanded motor current value, I(peak last) is the previous required peak motor current value from the immediately preceeding PWM cycle, and I(turn-on) is the turn-on motor current value.
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