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Automatic Motor Current Limit Configuration Based on Phase Feedback with Tapered Starting Current

IP.com Disclosure Number: IPCOM000016110D
Original Publication Date: 2002-Aug-21
Included in the Prior Art Database: 2003-Jun-21

Publishing Venue

IBM

Abstract

This invention provides a method of allowing a single motor drive to safely and reliably power a wide range of motors without the use of custom code or embedded memory devices in the motor itself. In addition, it is capable of providing momentarily higher current to a motor during starting, where it is needed most. This helps to eliminate start failures while still providing adequate protection from triggering a solid state circuit breaker. This provides variable level HARDWARE overcurrent protection which is the only acceptable type to obtain UL certification. (without a formal UL code review). Current state of the art: There is no current technology of this type. Currently, different code is used for each motor/drive combination. The present is not an economical solution.