5-phase stepping motor micro-step drive device

摘要

PROBLEM TO BE SOLVED: To provide a micro-step drive unit of a five-phase stepping motor which is simple in constitution, and also can perform micro-step drive reduced in torque ripple.;SOLUTION: In the drive unit of the five-phase stepping motor; in a phase current I(k, t) flowing to each phase winding Aϕ, Bϕ, Cϕ, Dϕ and Eϕ, t is set as a time constant, to is set as a unit time interval, α is set as an arbitrary constant (0≤α≤10), and k is set as a numerical value (k=0, 1, 2, 3, 4) which corresponds to each connecting point. When a residual value obtained by dividing [t/to-2(k-1)+α] by 10 is positive, A(k, t) is set as it is, when the value is negative, a value obtained by adding 10 to the value is set as A(k, t), and when Io is set as a constant, and f(m) and g(m) are set as functions of m, an expression of I(k, t)=Io×D(k, t) is represented, and D(k, t) is expressed by a numerical expression 1.;COPYRIGHT: (C)2008,JPO&INPIT