| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the control device of a three-phase brushless motor that can control speed and a position by using a small space at low cost. <P>SOLUTION: The control device of the three-phase brushless motor comprises a control circuit that starts the rotation of the motor by switching phases of a coil to be energized in accordance with a rotative direction, when the desired rotative direction is indicated from a state that a rotor magnet 3 is fixed to an original point by energizing a preset two-phase or three-phase coil 2; shortens a switching time of phases of the coil to be energized at acceleration step by step; elongates the switching time step by step at deceleration; and performs the stop position control of the rotor magnet by counting the number of times of switchings of the phases of the coil. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
