Motor control device and motor control method
AssigneeTmeic Corporation
InventorsKenshi Takao, Shunsuke Tobayashi
Life of this patent
Estimating the term…
Abstract
A motor control device includes a signal identifying unit and an overvoltage detecting unit. The signal identifying unit includes an optical isolator that converts an electrical signal supplied via a terminal to which an external device is connected and a switch that turns off a connection circuit connected to the terminal. The overvoltage detecting unit is configured to turn off the switch when a voltage applied to the connection circuit is greater than a threshold voltage.
Claims9
A motor control device comprising:
- a signal identifying unit including an optical isolator that converts an electrical signal supplied via a terminal to which an external device is connected and a switch that opens a connection circuit connected to the terminal;
- and
- an overvoltage detecting unit configured to turn off the switch when a voltage applied to the connection circuit is greater than a threshold voltage,
- wherein the signal identifying unit further includes a detection voltage setting circuit that is provided closer to the optical isolator than the switch and connected in parallel to a primary circuit of the optical isolator.
A motor control method that is performed by a motor control device in which an optical isolator that converts an electrical signal supplied via a terminal to which an external device is connected and a switch that turns off a connection circuit connected to the terminal are provided, the motor control method comprising:
- detecting using a voltage setting circuit that is provided closer to the optical isolator than the switch and connected in parallel to a primary circuit of the optical isolator, and
- turning off the switch when the voltage applied to the connection circuit is greater than a threshold voltage.
Dependencies are inferred from the claim text.