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:
Apr. 07, 2020
Filed:
Nov. 17, 2017
Black & Decker, Inc., New Britain, CT (US);
John D. Cox, Lutherville, MD (US);
Michael K. Forster, White Hall, MD (US);
John C. Vanko, Timonium, MD (US);
Daniel J. White, Baltimore, MD (US);
Bhanuprasad V. Gorti, Perry Hall, MD (US);
Matthew J. Velderman, Baltimore, MD (US);
Andrew E. Seman, Jr., Pylesville, MD (US);
Black & Decker Inc., New Britain, CT (US);
Abstract
A power tool is provided including a brushless motor. A power supply interface is arranged to receive at least one of AC power from an AC power supply having a first nominal voltage or DC power from a DC power supply having a second nominal voltage, where the first and second nominal voltages both fall approximately within the operating voltage range of the motor. A motor control circuit is provided including a rectifier circuit converting the AC power to a rectified voltage signal, a power switch circuit having power switches to supply electric power from at least one of the DC power or the rectified voltage signal to the motor, and a controller controlling a switching operation of the power switches to regulate the supply of electric power to the motor at a level corresponding to the operating voltage range of the motor.