Push-pull output stage for driving motors which generates auxili

Details Push-pull output stage for driving motors which generates auxili Push-pull output stage for driving motors which generates auxili

1993-05-14

1994-12-27

Shoop, Jr., William M.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 98, 363 16, 318434, 318138, 327110, 327436, H02M 7538

Patent

active

053770943

ABSTRACT:
A push-pull output stage for driving a motor which provides an auxiliary power supply Vaux above supply voltage Vcc by using highside MOSFETs which do not have source-body shorts, and by connecting a capacitor to the poles of the motor through rectifying diodes which output flyback pulses to the capacitor. Damage to the highside MOSFETs is prevented by limiting the voltage on the capacitor using a zener diode. The push-pull output stage increases the driving potential applied to the motor be eliminating the need for an isolating Schottky diode between the output stage and a power source. Back emf continues to supply energy to Vaux even after Vcc is removed.

REFERENCES:
patent: 4710686 (1987-12-01), Guzik
patent: 4829415 (1989-05-01), Haferl
patent: 4901216 (1990-02-01), Small
patent: 5019719 (1991-05-01), King
patent: 5119000 (1992-06-01), Schultz
patent: 5157592 (1992-10-01), Walters
patent: 5262704 (1993-11-01), Farr

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