| 摘要 |
<P>PROBLEM TO BE SOLVED: To control at the maximum efficiency a motor connected to a load of large fluctuation. <P>SOLUTION: A drive device 100 controls an IPM motor 51. The device comprises a current sensor 55 for detecting a current and a current amplifier 56, a mechanical angle determining part 70 for detecting a mechanical angle, a sine wave data generating part 67 for generating voltage data, an inverter circuit 52 for energizing each coil based on the control data, a torque storing part 72 that stores a first correction value corresponding to the mechanical angle, and a microcomputer 57 for controlling the inverter circuit 52. The microcomputer 57 comprises a detection part 60 which calculates the ratio between integrated values of currents, a PI calculation part 63 which calculates a second correction value to control the ratio which is calculated by the detection part 60 to a target ratio, and a PWM generation part 68 for calculating control data. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
