Motor driving apparatus
AssigneeFanuc Corporation
InventorsKunio Tsuchida, Taku Sasaki, Nobuo Hirayama
Life of this patent
Estimating the term…
Abstract
To provide a motor driving apparatus capable of obtaining high detection resolution irrespective of whether a frequency of a signal from a detector is high or low. A motor driving apparatus for driving a motor includes an amplifier circuit for receiving a signal from a detector for outputting information including a position and a speed of the motor as the signal, and amplifying the received signal with a set amplification factor, a frequency detecting part for detecting a frequency of the signal, and an amplification factor setting part for changing setting of the amplification factor of the amplifier circuit according to the frequency detected by the frequency detecting part.
Claims12
A motor driving apparatus for driving a motor, the motor driving apparatus comprising:
- an amplifier circuit for receiving a signal corresponding to a sine wave from a detector and amplifying the signal with a set amplification factor, the detector outputting information including a position and a speed of the motor as the signal;
- a frequency detecting part for detecting a frequency of the signal by calculating using a number of the signals each corresponding to the sine wave output by the detector per rotation of the motor and a motor rotational speed command value from a numerical control unit to the motor driving apparatus;
- and
- an amplification factor setting part for changing setting of the amplification factor of the amplifier circuit according to the frequency detected by the frequency detecting part.
A motor driving apparatus for driving a motor, the motor driving apparatus comprising:
- an amplifier circuit for receiving a signal from a detector and amplifying the signal with a set amplification factor, the detector outputting information including a position and a speed of the motor as the signal;
- a frequency detecting part for detecting a frequency of the signal;
- and
- an amplification factor setting part for changing setting of the amplification factor of the amplifier circuit according to the frequency detected by the frequency detecting part,
- wherein a value of the amplification factor is lower as the frequency is lower, and is higher as the frequency is higher.
Dependencies are inferred from the claim text.