Positioning control apparatus

Details Positioning control apparatus Positioning control apparatus

1978-01-30

1979-04-24

Dobeck, B.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318696, G05B 1940

Patent

active

041514491

ABSTRACT:
A digital code representing a reference angular position .phi. of a polyphase synchronous motor is stored in a register. Each one current-controllable power supply is provided for each phase of the motor, and each power supply is controlled by the contents of the register and maintain the current supplied to the corresponding phase of the motor at a value proportional to cos{.phi.-(k-1)2.pi./N}, where N is the total number of phases of the motor and k is the sequential order (1, 2, 3, . . . N) of a phase concerned. A resultant magnetic field is produced in a direction corresponding to the reference angular position .phi., and the rotor of the motor stops at the direction of the resultant field. When the contents of the register is changed, the angular position of the rotor follows the change of the contents of the register.

REFERENCES:
patent: 3842332 (1974-10-01), Heine et al.
patent: 3866104 (1975-02-01), Heine

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