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:
Mar. 10, 2015
Filed:
Jan. 27, 2011
Markus Hirt, Villingen-Schwenningen, DE;
Markus Hirt, Villingen-Schwenningen, DE;
EBM-PAPST St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
An electric motor () has a permanent-magnet rotor () and an apparatus for generating a three-phase sinusoidal current (i, i, i) for supplying current to said motor (), also a microprocessor () for executing the following steps: while the motor () is running at a substantially constant load, the motor is operated firstly at a predetermined operating voltage (U), and an amplitude of a current flowing to the motor is iteratively sampled, stored, and compared as applied voltage is decreased. If it is found, in this context, that the current flowing to the motor has not decreased as a result of reduction in the voltage amplitude, the motor () is operated at that current. If, however, it is found that the current flowing to the motor has decreased as a result of the reduction in the voltage delivered to the motor (), the measurements and the comparison are repeated, optionally multiple times, in order to identify values for optimized efficiency.