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THREE PHASE MOTOR DRIVER Disclosure Number: IPCOM000025631D
Original Publication Date: 1986-Dec-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal


In laser scanner systems, a major contributor to print quality (line to line pixel placement) is the polygon motor and its associated driver. In a typical scanner, a hysteresis synchronous motor is used with either two or three phase windings. The two phase designs require positive and negative power supplies and quadrature (90" phase shift) waveforms. Three phase motors on the other hand are driven with the 120" phased waveforms and require only one power supply.