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:
Oct. 01, 1991
Filed:
Jun. 21, 1990
Antonino Fratta, 10139 Torino, IT;
Other;
Abstract
A converter of the electric energy fed by a unidirectional voltage source, comprising a voltage inverter circuit arranged to deliver an alternating voltage, possibly polyphase, to an inductive load such as an electric motor, wherein between the energy source and the voltage inverter circuit there is inserted a set of components arranged for controlling in an active manner the supply voltage of the inverter circuit, limiting the maximum value of the voltage applied thereto and assisting the commutation by transitorily bringing to zero (or to a negative value) the supply voltage applied to the inverter circuit during the periods of time in which any commutation should be carried out therein. This set of components includes a capacitor connected, through a diode, in parallel to the unidirectional voltage source, a first controlled switch inserted in parallel to the diode, and a second controlled switch inserted in parallel to the inverter circuit input.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile