Browse Prior Art Database

Step Motor Chopper Driver

IP.com Disclosure Number: IPCOM000052570D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11

Publishing Venue

IBM

Related People

Authors:
Cook, PA Raider, JW [+details]

Abstract

Step motor drive circuits use voltage chopping techniques to improve motor performance at high speeds while minimizing power dissipation. Conventional chopper drives control current during high positive back emf (Vemf) operating regions but are limited in their ability to keep current constant during high negative back emf operating regions.