Electric motor drive equipped with a permanently magnetized roto

Details Electric motor drive equipped with a permanently magnetized roto Electric motor drive equipped with a permanently magnetized roto

1986-01-23

1987-08-04

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

046848606

ABSTRACT:
The motor (9) comprises a motor winding with two phases (2, 3). Sensor c detects the orientation of the permanently magnetized rotor. Selector (S) controlled by line (s) which can be connected to a memory (M) selects the sending to circuit (C) of clock pulses (H) or signals (G) coming from circuits (F) which receives the pulses emitted by sensor (c). In circuit (C) the signals received from the selector are processed and shaped into control signals which act in the power stage of circuit (P) upon each of the two phases (2, 3) by triggering and releasing them alternately in such a way as to ensure that the operation of the rotor occurs either in step mode, under the influence of the clock signals (H), or in direct current mode, i.e., as a function of the momentary position of the rotor as it is detected by sensor (c).

REFERENCES:
patent: 3940677 (1976-02-01), Morino et al.
patent: 4376262 (1983-03-01), Okuda et al.
patent: 4415844 (1983-11-01), Mendenhall et al.
patent: 4591774 (1986-05-01), Ferris et al.

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