Motor driving device and motor driving method
First Claim
1. A rotor position sensorless multiphase motor driving device comprising:
- a rotor;
a plurality of phase windings;
a common terminal to which one terminal of terminals at both ends of each winding is star connected;
an upper-side drive transistor and a lower-side drive transistor connected to the other terminal of the winding;
a commutation control unit operable to select two terminals from the terminals other than the common terminal of the windings, and to turn on the corresponding pair of upper-side drive transistor and the lower-side drive transistor;
a rotor position search pulse applying unit operable to apply a search pulse between the selected two terminals; and
a comparing unit operable to detect a rotor position based on a response signal generated between the unselected terminal other than the common terminal and the common terminal according to the search pulse application.
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Accused Products
Abstract
A rotor position sensorless multiphase motor driving device includes a rotor; a plurality of phase windings; a common terminal to which one terminal of terminals at both ends of each winding is star connected; an upper-side drive transistor and a lower-side drive transistor connected to the other terminal of the winding; a commutation control unit operable to select two terminals other than the common terminal of the windings, and to turn on the corresponding pair of upper-side drive transistor and the lower-side drive transistor; a rotor position search pulse applying unit operable to apply a search pulse to the selected two terminals; and a comparing unit operable to detect a rotor position based on a response signal generated between the terminal which was unselected and the common terminal according to the search pulse application.
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Citations
53 Claims
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1. A rotor position sensorless multiphase motor driving device comprising:
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a rotor; a plurality of phase windings; a common terminal to which one terminal of terminals at both ends of each winding is star connected; an upper-side drive transistor and a lower-side drive transistor connected to the other terminal of the winding; a commutation control unit operable to select two terminals from the terminals other than the common terminal of the windings, and to turn on the corresponding pair of upper-side drive transistor and the lower-side drive transistor; a rotor position search pulse applying unit operable to apply a search pulse between the selected two terminals; and a comparing unit operable to detect a rotor position based on a response signal generated between the unselected terminal other than the common terminal and the common terminal according to the search pulse application. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A motor driving method of a rotor position sensorless multiphase motor driving device comprising:
- a rotor;
a plurality of phase windings;
a common terminal to which one terminal of terminals at both ends of each winding is star connected;
a plurality of a set of an upper-side drive transistor and a lower-side drive transistor connected to the other terminal of the winding; and
a commutation control unit operable to turn on the pair of upper-side drive transistor or the lower-side drive transistor, the method comprising;selecting two terminals from the terminals other than the common terminal of the windings when the rotor is started and applying a search pulse between the selected two terminals to search a rotor position; detecting the rotor position based on a response signal generated between the terminal which was not selected and the common terminal at the search pulse applying step; and applying a start rotation pulse based on the detected rotor position. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
- a rotor;
Specification