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:
Nov. 06, 2001
Filed:
Apr. 06, 2000
Mohammed Arefeen, Houston, TX (US);
Wajiha Shireen, Houston, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A modified PWM space vector technique is described which includes a DC ripple voltage measurement scheme supplying feed-back to a DSP controller which then computes and generates the instantaneous PWM drives required for ripple voltage cancellation in a lightly filtered line voltage node, and executes the interface to the multi-phase power inverter circuitry. This preferably becomes a part of a closed loop motor speed control process. Use of the modified PWM drive in this manner greatly reduces the value of the filter capacitor required, allowing for the use of non-electrolytic capacitors having greater reliability and being available at lower cost.