Back to results
US 5,306,996 AGranted
AC/DC stepped drive system
OwnerTai-Her Yanginventor
Life of this patent
Estimating the term…
Abstract
A switched stepping motor for use in a computer-controlled processing system, the motor being capable AC or DC operation in a continuous or stepwise manner for completing a variety of operations such as lathe cutting, drilling, planning, milling, abrading, and boring.
Claims15
A stepped drive system operable from an AC or a DC source input, comprising:
- a housing;
- a stator attached interiorly of said housing, said stator including a stator core having a plurality of salient poles projecting interiorly of said housing, said poles being arranged in diametric pairs and each having a corresponding stator winding wound thereabout;
- a rotor rotatably mounted within said housing, said rotor further comprising,
- an axle rotatably supported by said housing,
- a first rotor core mounted on said axle and having a plurality of poles extending radially therefrom,
- a rotor winding wound about said first rotor core, and
- a first conductive slip ring and a second conductive slip ring both mounted on said axle and electrically connected to said rotor winding;
- a brush assembly for rotatably electrical contact with said slip rings;
- and
- a switching circuit for conducting power from a source input to said stator windings, and to said rotor windings via said brush assembly, said switching circuit further comprising a first plurality of switch devices each connected in series with the stator windings about a diametric pair of stator poles for selectively applying said source input thereto, and a second plurality of switch devices coupling said rotor winding to said first plurality of switches for allowing application of said source input thereto according to a selected polarity.
7 more elements
A stepped drive system operable from an AC or DC source, comprising:
- a rotor having a pair of slip rings and a rotor winding connected to said slip rings;
- a stator having a plurality of pairs of diametric poles;
- a plurality of stator windings, one each of said stator windings being wound around one each of said stator poles;
- a plurality of commutating switches;
- a plurality of individual circuit legs corresponding in number to the number of said pairs of stator poles, each of said circuit legs including said stator windings about one of said pairs of diametric stator poles connected in series with each other and with one of said commutating switches;
- said circuit legs being connected in parallel with one another, and
- a plurality of reversing switches connecting said rotor winding through said slip rings in series with said parallel connected circuit legs whereby the direction of current flow from said parallel connected circuit legs into said rotor winding may be selectively reversed.
4 more elements
A stepped drive system operable from an AC or DC source, comprising:
- a rotor having a pair of slip rings and a rotor winding connected to said slip rings;
- a stator having two pairs of diametric poles;
- a plurality of stator windings, one each of said stator windings being wound around one each of said stator poles;
- a plurality of polarity reversing relays;
- a pair of individual circuit legs, each of said circuit legs including said stator windings about one pair of diametric poles connected in series with each other and between a pair of said polarity reversing relays, one each of said circuit legs being connected together;
- and
- a commutating relay connected between the ends of said circuit legs opposite said one end thereof and said rotor winding for selectively connecting said rotor winding in series with one of said circuit legs.
4 more elements
Dependencies are inferred from the claim text.