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. 29, 1977
Filed:
Jun. 20, 1975
Charles Phillot, Aarau, CH;
Heinz Unterweger, Buchs, CH;
Sprecher & Schuh AG, Aarau, CH;
Abstract
A reference value transmitter for a phase clipping or cutting control for starting a squirrel cage-asynchronous motor, comprising a start-up regulator for the upward regulation of a reference value transmitter- output voltage from a start-up voltage value which is constant during a primary start-up phase to a rated voltage value with a predetermined build-up speed during a terminal start-up phase. The start-up regulator is constructed for triggering the terminal start-up phase by means of a command signal and for the start-up regulator there is provided a command transmitter which contains a current measuring device for the motor current and a threshold value or limit indicator connected with the current measuring device for generating the command signal. By means of the threshold value of the threshold value indicator there is determined the intensity of the motor current during the pull-out rotational speed and which motor current amounts to a predetermined fraction of the motor current intensity at the start of the primary start-up phase.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile