| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller for brushless motor which can enhance motor performance by reducing the influence of the unbalance among three phases and improving the frequency properties of a motor. <P>SOLUTION: The controller for brushless motor calculates a U-phase current I<SB>u</SB>, a V-phase current I<SB>v</SB>, and a W-phase current I<SB>w</SB>, and a d-axis current I<SB>d</SB>corresponding to the rotational position of a rotor, and d-axis target voltage V<SB>d</SB><SP>*</SP>which is obtained by the integrating operation being the feedback operation of the q-axis current I<SB>q</SB>, and the first U-phase target voltage V<SB>u1</SB><SP>*</SP>, the first V-phase target voltage V<SB>v1</SB><SP>*</SP>, and the first W-phase target voltage V<SB>w1</SB><SP>*</SP>corresponding to the q-axis target voltage V<SB>q</SB><SP>*</SP>. It calculates the second U-phase target voltage V<SB>u2</SB><SP>*</SP>, the second V-phase target voltage V<SB>v2</SB><SP>*</SP>, and the second W-phase target voltage V<SB>w2</SB><SP>*</SP>by the proportional operation being the feedback operation of each phase currents I<SB>u</SB>, I<SB>v</SB>, and I<SB>w</SB>. It drives the motor 1 by applying the U-phase target voltage V<SB>u</SB><SP>*</SP>corresponding to the sum of the first and second U-phase target voltage, the V-phase target voltage V<SB>v</SB><SP>*</SP>corresponding to the sum of the first and second V-phase target voltage, and the W-phase target voltage V<SB>w</SB><SP>*</SP>corresponding to the sum of the first and second W-phase target voltage to each coil. <P>COPYRIGHT: (C)2008,JPO&INPIT |
