Calculating a load resistance
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United States of America
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Jan 7, 2020
Grant Date -
Aug 8, 2019
app pub date -
Feb 7, 2018
filing date -
Feb 7, 2018
priority date (Note) -
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Abstract
For calculating load resistance, a pulse generation module drives a pulse width modulation (PWM) inverter in response to a control voltage. The PWM inverter includes a U phase pole, a V phase pole, and a W phase pole. Each U, V, and W phase pole includes an upper pole device and a lower pole device. The PWM inverter turns off the U phase pole, turns on the W upper pole device, turns off the W lower pole device, and applies the control voltage to the V upper pole device and the V lower pole device. A forward drop correction module corrects the control voltage based on a feedforward compensation voltage determined from a forward voltage drop. A load resistance module calculates a load resistance for a load based on an average control voltage, an average bus voltage, and an average load feedback current.
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