Method of instant estimation of a load motor inertia
AssigneeDelta Electronics, Inc.
InventorsChing-Hsiung Tsai, Po-Ming Chen
Life of this patent
Estimating the term…
Abstract
A method of instant estimation of the rotor inertia of a load motor is disclosed. The adaptive filter accompanied with the Least Mean Square Rule is introduced to instantly estimate the rotor inertia of a load motor. One input of the adaptive filter is the current signal of a model motor whose rotor inertia is known, and the other is the deviation current signal between the model motor and the drive motor. Once the two inputs are determined, the rotor inertia of the load motor will then be calculated using the Least Mean Square Rule and the adaptive filter.
Claims8
A method of instant estimation of the rotor inertia of a load motor used in a servo control system with a controlled object, the method comprising the steps of:
- referring to a model motor to determine an input signal of an adaptive filter according to the current signal of the model motor;
- determining a desired signal of an adaptive filter according to the error between a drive motor current signal and the model motor current signal;
- obtaining a plurality of delay signals according to the input signal and multiplying the delay signals by the corresponding weights to output a weighted output signal;
- determining the error between the weighted output signal and the desired signal;
- and
- determining by the adaptive filter the rotor inertia of the servo control system according to the input signal and the desired signal using the Least Mean Square (LMS) Rule.
Dependencies are inferred from the claim text.