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, 2016
Filed:
Sep. 20, 2006
Anthony John Wilder, Hove, GB;
Anthony John Wilder, Hove, GB;
Edwards Limited, Crawley, West Sussex, GB;
Abstract
A pumping system has a motor () for driving a pumping mechanism (). A variable frequency drive unit () has an input for receiving electrical energy of relatively high power and first, fixed frequency from a power supply, and an output coupled to an input () of the motor for supplying electrical energy of relatively low power and second, variable frequency to the motor. This second frequency preferably has a maximum value greater than the first frequency. A control circuit () is provided for selectively coupling the motor input () directly to the power supply for the supply of the relatively high power energy to the motor to maximize the torque that can be produced by the pumping mechanism. After a period of time the control circuit terminates the direct coupling of the motor input to the power supply for the supply of the relatively low power energy to the motor.