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Motor Internal Resistance Value Correction Disclosure Number: IPCOM000039360D
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-01

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Cavill, BR Murphy, JR [+details]


This article describes a technique to provide correction of the motor drive component in an electric motor related to the motor internal resistance to account for velocity variations due to motor temperature changes. The drive values calculated for driving a printer are determined by adding three components of the drive value together. These three components of the drive are the frictional effects term, the Emf term which provides the acceleration, and the internal resistance term which is applied when accelerating and decelerating and represents the voltage required to overcome the internal losses in the motor. It has been determined that this value is constant for a motor/system configuration, but the value varies as the temperature in the motor increases.