Okuma Machinery Works Ltd.

Ryuji Toida

Yuji Sakai

Mitsuru Ikegami

A multipolar resolver is so constructed that the need of the conventionally indispensable coil on the resolver rotor is eliminated by providing a center coil on a stator, and 5n or 3n rotor poles and 4n stator poles are provided where n is a positive integer. Sine and consine coils are wound on the stator poles alternately, thus simplifying the construction of the multipolar resolver.

Multipolar resolver

A reading system for a hybrid A-D converter having, in combination, code disk A-D converters for converting an analog quantity such as a rotation angle or the like into a digital quantity and a neighborhood absolute value detector such as an inductosyn, a resolver or the like for providing the absolute value of a rotation within a small range thereof to, thereby extend the neighborhood absolute value region. Each of the code disk A-D converters supplies an output signal l and a carry signal Cr(1) which is generated depending on whether an output signal from a lower order code disk A-D converter is included in a predetermined upper group to a corresponding one of the logical circuits which are provided so as to correspond in number to the code-disk A-D converters. The logical circuit performing the logical operation L = l .multidot. (Cr.multidot.l-1+Cr.multidot.l+1) provides a signal representative of one digit whereby the outputs from the A-D converters are prevented from errors upon carrying. The neighborhood absolute value detector supplies a carry signal Cr(2) depending on whether the neighborhood absolute value is included in the predetermined upper group. The carry signal Cr(2) and the inverted signal Cr(2) of the carry signal Cr(2) are adapted to be supplied to the logical circuit in time-sharing relation to the carry signal Cr(1) and the inverted signal Cr(1) of the carry signal Cr(1).

Growing community of inventors

Nagoya, Japan

Ryuji Toida