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:
Jun. 10, 2025
Filed:
Dec. 16, 2021
Tata Elxsi Limited, Bangalore, IN;
Anush Gopalakrishnan Nair, Bangalore, IN;
Krishna Priya Ganesh, Bangalore, IN;
Reshma Ravi, Bangalore, IN;
Tata Elxsi Limited, Bangalore, IN;
Abstract
A motor controller () is provided for smooth operation of an electric motor (), which mitigates torque ripple, noise and vibration effects, and increases a life span of the motor (). The motor controller () includes a speed controller (), current transformation units (and), a current controller (), and a pulse width modulation (PWM) signal generator (). The current controller () determines a duty cycle of PWM gate signals used for controlling a rotor () speed within a particular sector (A) of the motor () based on a reference quadrature-axis current and an actual quadrature-axis current. The PWM signal generator generates the PWM gate signals having the determined duty cycle, controls the rotor () speed, and incrementally varies a current speed of the motor () to achieve a target speed by modulating operations of a specific pair of inverter switches (C andE) using the PWM gate signals.