초록 ▼

A motor which has a first motor winding that provides a motor back EMF during operation of the motor, and which is operable by a supply current to develop, at a predetermined nominal rotational speed, a predetermined nominal torque corresponding to a predetermined operating current and a predetermin

A motor which has a first motor winding that provides a motor back EMF during operation of the motor, and which is operable by a supply current to develop, at a predetermined nominal rotational speed, a predetermined nominal torque corresponding to a predetermined operating current and a predetermined nominal back EMF, is calibrated by applying a supply current to the motor such that the motor operates at a known rotational speed, disconnecting the supply current from the motor such that the motor decelerates from the known rotational speed, and obtaining an EMF indication of motor back EMF. The EMF indication is compared with the predetermined nominal back EMF, and a supply current adjustment that provides for compensation of the supply current based on the EMF indication and the predetermined nominal back EMF is developed, such that the motor produces the predetermined nominal amount of torque when operated at the predetermined nominal rotational speed. The supply current adjustment is stored so that the motor can subsequently be operated with the supply current and the stored supply current adjustment.

대표청구항 ▼

[ What is claimed is:] [1.] A method of calibrating a motor having a first motor winding that provides a motor back EMF during operation of the motor, wherein the motor is operable by a supply current to develop, at a predetermined nominal rotational speed, a predetermined nominal torque correspondi

[ What is claimed is:] [1.] A method of calibrating a motor having a first motor winding that provides a motor back EMF during operation of the motor, wherein the motor is operable by a supply current to develop, at a predetermined nominal rotational speed, a predetermined nominal torque corresponding to a predetermined operating current and a predetermined nominal back EMF, the method comprising the steps of:applying a supply current to the motor such that the motor operates at a known rotational speed;disconnecting the supply current from the motor such that the motor decelerates from the known rotational speed;obtaining an EMF indication of motor back EMF;comparing the EMF indication with the predetermined nominal back EMF;developing a supply current adjustment providing for compensation of the supply current based on the EMF indication and the predetermined nominal back EMF such that the motor produces the predetermined nominal amount of torque when operated at the predetermined nominal rotational speed; andstoring the supply current adjustment.