초록 ▼

A method of reconnecting a motor to a motor drive comprises controlling a current which flows through the motor using a current regulator. The current regulator produces a voltage command output based on a current command input. A current is commanded at the current command input of the current regu

A method of reconnecting a motor to a motor drive comprises controlling a current which flows through the motor using a current regulator. The current regulator produces a voltage command output based on a current command input. A current is commanded at the current command input of the current regulator. Back EMF measurements are acquired at different instants in time by monitoring the voltage command output of the current regulator. Back EMF phase angles are determined for a plurality of the instants in time based on a respective plurality of the back EMF measurements. A frequency of the back EMF is determined based on the back EMF angles determined for the plurality of instants in time. The motor drive is reconnected to the motor based on the frequency of the back EMF.

대표청구항 ▼

1. A method of reconnecting a motor to a motor drive comprising:(A) controlling a current which flows through the motor using a current regulator, the current regulator producing a voltage command output based on a current command input; (B) commanding a current at the current command input of the c

1. A method of reconnecting a motor to a motor drive comprising:(A) controlling a current which flows through the motor using a current regulator, the current regulator producing a voltage command output based on a current command input; (B) commanding a current at the current command input of the current regulator; (C) acquiring back EMF measurements at different instants in time by monitoring the voltage command output of the current regulator; (D) determining back EMF phase angles for a plurality of the instants in time based on a respective plurality of the back EMF measurements; (E) determining a frequency of the back EMF based on the back EMF angles determined for the plurality of instants in time; and (F) reconnecting the motor drive to the motor based on the frequency of the back EMF; wherein the current that is controlled during the controlling step (A) is a first current, the current regulator is a first current regulator, the voltage command output is a first voltage command output, and the current command input is a first current command input; wherein the method further comprises (1) controlling a second current which flows through the motor using a second current regulator, the second current regulator producing a second voltage command output based on a second current command input, and (2) commanding a current at the second current command input of the second current regulator; wherein, during the acquiring step (C), a plurality of back EMF measurements are acquired each different instant in time, including a first back EMF measurement acquired by monitoring the first voltage command output of the first current regulator and a second back EMF measurement acquired by monitoring the second voltage command output of the second current regulator; and wherein the determining step (D) includes comparing the first and second back EMF measurements.