Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...
Patent
1995-02-28
1996-04-02
Sircus, Brian
Electricity: motive power systems
Positional servo systems
With particular motor control system responsive to the...
368217, G05B 1940
Patent
active
055044085
ABSTRACT:
The method is designed to supply the motor with chopped voltage pulses of varying durations as a function of the load conditions and of the supply voltage. The chopped voltage pulse is composed of a plurality of partial pulses of predetermined durations T1, T2, and T3. The feeding circuit comprises a detector of a condition of extreme load defined by k1.multidot.T4<k2.multidot.T5, wherein k1 and k2 are constants, T4 is an interval separating T1 and T2, and T5 is an interval separating T2 and the first pulse T3.
REFERENCES:
patent: 4361410 (1982-11-01), Nakajima et al.
patent: 4542329 (1985-11-01), Tu Xuan
patent: 5166590 (1992-11-01), Tu et al.
patent: 5247235 (1993-09-01), Tu et al.
patent: 5294877 (1994-03-01), Cameron
Schwab Michel
Tu Mai X.
Detra SA
Sircus Brian
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