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. 21, 2020
Filed:
Nov. 21, 2018
Mitsubishi Heavy Industries Compressor Corporation, Tokyo, JP;
Abstract
There is provided a variable speed increaser including a planetary gear transmission device which changes the speed of a rotational driving force of the electric driving device and transmits the changed rotation driving force to a driving target, and a rotation rate controller. The electric driving device includes a constant-speed motor having a constant-speed rotor, and a variable-speed motor having a variable-speed rotor and driven in a regenerative mode and in a power mode. A rotation rate of the output shaft varies within an operation range between a maximum rotation rate and a minimum rotation rate. The constant-speed motor has a rated torque which allows the output shaft to have the maximum rotation rate by itself. The rotation rate controller changes the rotation rate of the output shaft rotating within the operation range by driving the variable-speed motor only in the regenerative mode.