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US 2010/0148753 A1Published application
Method to predict phase current
AssigneeSamsung Electronics Co., Ltd.
InventorsJung Ik Ha, Jong Ho Kim, Ho Sun Yoo, Hyung Sun You, Jang Hwan Kim
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Abstract
A phase current prediction method is disclosed. The phase current prediction method predicts current representative of a PWM period using a motor model which receives current measured through a single current sensor as an input, instead of the measured current, and determines the predicted current to be phase current.
Claims14
A phase current prediction method comprising:
- sequentially applying an effective voltage vector to an inverter;
- measuring DC link current in a period in which the effective voltage vector is applied;
- and
- predicting three phase currents representative of a PWM period of the inverter using the measured DC link current.
1 more element
A phase current prediction method comprising:
- sequentially applying a first effective voltage vector and a second effective voltage vector to an inverter;
- measuring first DC link current during a period in which the first effective voltage vector is applied;
- measuring second DC link current during a period in which the second effective voltage vector is applied;
- predicting phase current using the first DC link current before the measuring the second DC link current, and predicting three phase currents using the measured second DC link current and the predicted phase current after the measuring the second DC link current;
- and
- predicting the three phase currents for a PWM period using the predicted three phase currents.
3 more elements
Dependencies are inferred from the claim text.