US 2026/0074635 A1 · LINEAR PARAMETER-VARYING OBSERVER FOR ESTIMATING PHASE CURRENT OF AN ELECTRIC MOTOR CONTROLLER

Abstract

A linear parameter-varying (LPV) observer for an electric motor controller. The controller includes a control loop with a current sensor that senses phase current signals driving an electric motor and that provides sensed current values used in the control loop. The observer includes an input interface and a processor. The input interface provides a sensed angular speed value, a sensed angular position value, physical parameters of the electric motor, and a pair of control loop control voltages used in the control loop. The processor calculates estimated current values indicative of the sensed current values using the angular speed value, the angular position value, the pair of control voltages, and the electric motor physical parameters. A failure detector may compare the sensed current values with the estimated current values to detect a failure, and substitute the estimated current signals for the sensed current signals when a failure is detected.

Claims20

Dependent claims

A reconfiguration system for an electric motor controller, the electric motor controller including a control loop with a current sensor configured to sense phase current signals driving an electric motor to provide sensed current values used for determining feedback current values that are used to determine control voltages in the control loop for generating the phase current signals, and an angular speed and position sensor that provides angular speed and position information of the electric motor, the reconfiguration system comprising:

a linear parameter-varying (LPV) observer including circuitry, the LPV observer configured to calculate estimated current values using the control voltages and the angular speed and position information;
and
a failure detector including circuitry, the failure detector configured to compare the sensed current values with the estimated current values for detecting a failure, and to substitute the estimated current signals for the sensed current signals when a failure is detected.

A linear parameter-varying (LPV) observer for an electric motor controller, the electric motor controller including a control loop with a current sensor configured to sense phase current signals driving an electric motor and to provide sensed current values used in the control loop, the LPV observer comprising:

an input interface for providing a sensed angular speed value, a sensed angular position value, and a plurality of physical parameters of the electric motor, and for providing a pair of control voltages in the control loop used for generating the phase current signals;
and
an LPV processor including circuitry, the LPV processor configured to calculate estimated current values indicative of the sensed current values using the sensed angular speed value, the sensed angular position value, the pair of control voltages, and the plurality of physical parameters of the electric motor.

Dependencies are inferred from the claim text.

Linear parameter-varying observer for estimating phase current of an electric motor controller

Life of this patent

Linear parameter-varying observer for estimating phase current of an electric motor controller

Life of this patent

Abstract

Claims20