| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inverter washing machine capable of stably performing sure electric braking. <P>SOLUTION: This inverter washing machine is composed of a DC brushless motor 7, position detecting means 55a to 55c for detecting a rotational position of a roror of the motor 7, a microcomputer 41 for outputting driving signals P1 to P6 on the basis of its detected position signals Hu, Hv and Hw, and an inverter circuit 35 for supplying a three-phase alternating current to the motor 7 by its driving signals. The microcomputer 41 is incorporated with a memory for storing data of a sine wave, and detects a rotating speed of the motor 7 from the position signals Hu, Hv and Hw, and sets a value of a data pointer becoming an address to the memory in response to the rotating speed in the timing provided from the position signals Hu, Hv and Hw. Thus, the microcomputer 41 can control a phase angle. When voltage inputted to the inverter circuit as a power source is a predetermined value or more, an initial value of the data pointer is changed in the delay direction to the motor rotating direction in the reversing timing of the position signals so as to reduce its inverter input voltage. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
