| 摘要 |
In a multiphase motor driver, each phase current is controlled by the ratio of measurements across a common sense element. By utilizing the same sense element for each phase, inaccuracies which result from the variance among multiple sense elements can be eliminated. The individual phase currents are controlled from a common clock generation device. By appropriately controlling each of the phase currents to assure that only one of the phase currents is flowing through the sense element at the time of measurement, the measurement is assured to be dependent on the individual current and the parametric value of the sense element only. Thereby, the control of the phase currents, via the ratio of the measured values across the common sense element, is independent of the parametric value of this common sense element. |
