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Browse Prior Art Database

MACHINE REACTIVE POWER OPTIMIZATION

IP.com Disclosure Number: IPCOM000024594D
Original Publication Date: 1981-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 73K

Publishing Venue

Xerox Disclosure Journal

Abstract

In many types of electromechanical equipment, including xerographic copiers and duplicators, it is highly desirable that the device operate at minimum total cost. It is also important that the operation of the device satisfy external conditions on power (including reactive power limitations), power consumption, variations in supply voltage and frequency, and electromagnetic emissions.

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In many types of electromechanical equipment, including xerographic copiers and duplicators, it is highly desirable that the device operate at minimum total cost. It is also important that the operation of the device satisfy external conditions on power (including reactive power limitations), power consumption, variations in supply voltage and frequency, and electromagnetic emissions.

This disclosure describes a method whereby these objectives may be achieved. It is based on the use of a Wanlass Controlled Torque Motor which uses AC control or a Wanlass Self-optimized Motor which uses DC control. The first device is described in U.S. Patent 4,063,135 and the second in U.S. Patent 4,095,149. The disclosure involves a control circuit which can operate in several modes to control the current carried by the main drive motor or reactive components of the equipment. These modes include feedback based on the detected status of current drain, prediction based on programmed operation of the equipment, and a combination of these two. In addition, the controller may adjust the operation of a reactive component or components added to the equipment in order to adjust the reactive power response of that component.

A simplified circuit diagram representing a typical embodiment of the disclosure is shown in Figure 1. Numeral 1 represents the source delivering power to the equipment whose impedance 2 varies with time and which generates a noise current
3. Energy storage capacitor...