US3842332A — Five-phase stepping motor systems

Claim 1

Independent Claim 108 words

A five-phase stepping motor system, comprising a stepping motor having five untapped stator windings connected in series with each other to form a pentagonal loop having five connectinG points, a permanent magnet rotor, and control means connected to said five connecting points for sequentially energizing a different set of four of faid windings simultaneously so as to step the motor, said control means forming with said windings damping means for damping the operation of the rotor after each step, said damping means including switching means in said control means for sequentially short circuiting the unenergized one of said windings during each sequential energization of four of the windings.

Claim 2

Dependent Claim 108 words

A five-phase stepping motor system, comprising a stepping motor having five untapped stator windings connected in series with each other to form a pentagonal loop having five connectinG points, a permanent magnet rotor, and control means connected to said five connecting points for sequentially energizing a different set of four of faid windings simultaneously so as to step the motor, said control means forming with said windings damping means for damping the operation of the rotor after each step, said damping means including switching means in said control means for sequentially short circuiting the unenergized one of said windings during each sequential energization of four of the windings.

Claim 3

Dependent Claim 45 words

A system as in claim 1, wherein said control means includes five switches each connected to one of said connecting points, positive voltage carrying means, negative voltage carrying means, and a control circuit for connecting said switches between said positive and negative voltage carrying means.

Claim 4

Dependent Claim 30 words

A system as in claim 2, wherein said stators include a plurality of poles with a distance Tp between poles, and wherein the poles produce a stepping angle Phi 1/5Tp.

Claim 5

Dependent Claim 63 words

A system as in claim 3, wherein the windings are wound in directions such that current entering or leaving four of the connecting points produces identical magnetic polarities in the stators excited by the windings adjacent to the respective connecting points and current through one of the connecting points produces opposing magnetic polarities in the windings adjacent the one of the connecting points.

Claim 6

Dependent Claim 34 words

A system as in claim 2, wherein said windings are wound so that current entering or leaving any one of the connecting points produces opposing magnetic polarities in the windings adjacent the connecting points.

Claim 7

Dependent Claim 36 words

A system as in claim 5, wherein said stators each include a plurality of poles, and wherein the rotary displacement between the adjacent stators or rotors is Phi 2/5Tp, wherein Tp is the pitch between poles.

Claim 8

Dependent Claim 29 words

A system as in claim 4, wherein adjacent windings are identified as 1-2-3-4-5-1, and wherein said control means should shift the operation of the windings in the sequence 1-2-3-4-5-1.

Claim 9

Dependent Claim 38 words

A system as in claim 6, wherein said windings which are successively adjacent to one another are identified as 1-2-3-4-5-1, and wherein said control means energize said windings so as to shift the energization in the sequence 1-4-2-5-3-1.

Claim 10

Dependent Claim 44 words

A system as in claim 1, wherein said stators each includes a plurality of poles forming a pole pitch of Tp, and wherein the poles of adjacent stators are displaced relative to each other by a distance equal to one of 1/5Tp or 2/5Tp.

Claim 11

Dependent Claim 43 words

A system as in claim 1, wherein said control means short-circuits one of said windings while energizing the others of said windings simultaneously and shifts the short-circuited winding in succession from winding to winding while simultaneously energizing the remaining ones of said windings.

Claim 12

Dependent Claim 69 words

A system as in claim 2, wherein said control means energizes said five switches so that two of said switches short-circuit one of said windings while said switches energize the remaining ones of said windings, and wherein said control means changes the switches so as to shift the one of said windings which is short-circuited to the other windings in succession while energizing the remaining ones of said windings.

Claim 13

Dependent Claim 38 words

A system as in claim 1, further comprising resistance means for each of said windings, each of said resistance means being connected in series with said one of said windings betwen each winding and the adjacent connecting points.

Claim 14

Dependent Claim 23 words

A system as in claim 2, further comprising resistance means connected between each connecting point and the switch connected to said connecting point.

Claim 15

Dependent Claim 26 words

A system as in claim 1, wherein said control means includes a logic section composed of a shift register having five flip-flops with a crossed return.

Claim 16

Dependent Claim 22 words

A system as in claim 2, wherein said control means furthEr includes a shift register with five flip-flops having a crossed return.

Claim 17

Dependent Claim 37 words

A system as in claim 14, wherein said logic section includes a pluraltiy of link members and wired AND gates for producing forward and backward control, and circuit means for suppressing postitions not needed for motor movement.

Claim 18

Dependent Claim 131 words

A multi-phase stepping motor system having more than four phases, comprising a stepping motor having a plurality of untapped stator windings equal to the number of phases and connected in series with each other to form a loop having a plurality of connecting points equal to the number of phases, a permanent magnet rotor, and control means connected to said connecting points for sequentially energizing a different set of all but one of said windings simultaneously so as to step the motor, said control means forming with said windings damping means for damping the operation of the rotor after each step, said damping means including switching means in said control means for sequentially short-circuiting the unenergized one of said windings during each sequential energization of the remaining ones of the windings.

Claim 19

Dependent Claim 131 words

A multi-phase stepping motor system having more than four phases, comprising a stepping motor having a plurality of untapped stator windings equal to the number of phases and connected in series with each other to form a loop having a plurality of connecting points equal to the number of phases, a permanent magnet rotor, and control means connected to said connecting points for sequentially energizing a different set of all but one of said windings simultaneously so as to step the motor, said control means forming with said windings damping means for damping the operation of the rotor after each step, said damping means including switching means in said control means for sequentially short-circuiting the unenergized one of said windings during each sequential energization of the remaining ones of the windings.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1977-10-14	1978-04-15	1978-10-15	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1981-10-14	1982-04-15	1982-10-15	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1985-10-14	1986-04-15	1986-10-15	$7700.00	Window Closed / Lapsed

Five-phase stepping motor systems

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