Dual hysteresis control circuit

Details Dual hysteresis control circuit Dual hysteresis control circuit

1996-07-19

1998-04-07

Cabeca, John W.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318635, 327 66, 327205, 330257, 388815, H02P 700

Patent

active

057368260

ABSTRACT:
A control circuit, in particular for a direct current control in positioning systems, comprising a differential circuit (1), a control logic (2) and a full bridge (3) connected between a supply voltage V.sub.S and a reference potential GND. The differential circuit (1) has a first hysteresis comparator (HC1) and a second hysteresis comparator (HC2). The two comparator inputs (HC1-, HC1+, HC2-, HC2+) of the two hysteresis comparators (HC1, HC2) are connected each to one of two input terminals (IN1, IN2) of the control circuit and crosswise to a comparator input of the respective other comparator (HC1, HC2). The inverting input of each comparator (HC1, HC2) is connected to the non-inverting input of the respective other comparator. (FIG. 1)

REFERENCES:
patent: 3656006 (1972-04-01), Bourke et al.
patent: 4290000 (1981-09-01), Sun
patent: 5140591 (1992-08-01), Palara et al.
patent: 5160896 (1992-11-01), McCorkle
Irie, Hisaichi, et al., "Control Circuit with Four Comparators for Four-Quadrant Chopper Driving," EPE-Proceedings 3:3-562-3-567, Firenze, 1991.
Lenz, Michael, "Querstromfreie Volbrucken-Stromversorgung fur Elektromotoren," Siemens Components 27(2):79-82, 1989.

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