The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 1977
Filed:
Mar. 03, 1975
James E Murray, University Heights, OH (US);
Robert J Resch, Chardon, OH (US);
Cyberex Incorporated, Mentor, OH (US);
Abstract
A common bus energization system is disclosed with first and second bus conductors across which a plurality of individual loads may be connected in parallel. Each of the loads is inductive and is capable of operating on direct current, for example, universal or shunt field DC motors, permanent magnet motors, magnetic particle clutches, eddy current clutches, relays, solenoids and the like. Voltage source means is provided to supply a resultant voltage to the first and second bus conductors. This voltage source means includes first and second sources with the first source connected to supply a large, positive voltage on the first conductor and the second source connected to supply a negative voltage on the first conductor. These two voltage sources are alternated with the first source effective a greater period of time for a net average polarity of positive on the first conductor. Each load, such as a motor, has a controllable semi-conductor connected to it to control the current through the motor. If the motor has a locked rotor or for some reason fails to develop a counter e.m.f., this polarity reversal of the resultant voltage insures that all motor control semi-conductors will stop conducting and recover their forward blocking characteristics. The retriggering of each individual motor control semi-conductor individually controls the speed or other characteristic of each motor. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.