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:
May. 12, 2020
Filed:
Jun. 20, 2017
Daikin Industries, Ltd., Osaka-shi, Osaka, JP;
Nobuki Kitano, Osaka, JP;
Tatsuki Inoue, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
An inverter device includes a converter section, an inverter section, and a control device. The converter section full-wave rectifies a three-phase AC voltage and outputs a DC voltage including a ripple component having a frequency six times the frequency of the three-phase AC voltage. The inverter section converts the DC voltage including the ripple component from the converter section into an AC voltage and outputs the AC voltage to a motor. The control device, in a rotating coordinate in which an N-pole direction of a permanent magnet embedded in a rotor of the motor is taken as a d-axis and a direction orthogonal to the d-axis is taken as a q-axis, controls the inverter section so that a phase of a d-axis voltage Vd of the ripple component included in the DC voltage leads a phase of a q-axis voltage Vq.