Decompression system, control device, and control method
AssigneeKabushiki Kaisha Yaskawa Denki
InventorAkinori Goto
Life of this patent
Estimating the term…
Abstract
A decompression system includes: an electric pump configured to decompress a primary-side space with respect to a secondary-side space; and a control device configured to control a motor of the electric pump, wherein the control device includes: a torque command generation unit configured to generate a torque command to operate the motor in accordance with an operation command; a limiter configured to limit the torque command to a limit value or less; a power conversion circuit configured to generate driving power corresponding to the torque command passed through the limiter and supply the driving power to the motor; and a limit changing unit configured to temporarily increase the limit value in response to opening of the decompressed primary-side space with respect to the secondary-side space.
Claims12
A decompression system comprising:
- an electric pump that decompresses an internal space of a chamber with respect to an external space of the chamber;
- a control circuit that:
- controls a motor of the electric pump, generates a torque command to
- operate the motor in accordance with an operation command,
- limits the torque command to a limit value or less, and
- temporarily increases the limit value in response to communication between the internal space and the external space;
- and
- a power conversion circuit that generates driving power corresponding to the torque command passed through the control circuit and supplies the driving power to the motor.
A control device comprising:
- a control circuit that:
- generates a torque command to operate, in accordance with an operation command, a motor of an electric pump that decompresses an internal space of a chamber with respect to an external space of the chamber,
- limits the torque command to a limit value or less, and
- temporarily increases the limit value in response to communication between the internal space and the external space;
- and
- a power conversion circuit that generates driving power corresponding to the torque command passed through the control circuit and supplies the driving power to the motor.
A control method comprising:
- generating a torque command to operate, in accordance with an operation command, a motor of an electric pump that decompresses an internal space of a chamber with respect to an external space of the chamber;
- limiting the torque command to a limit value or less;
- generating driving power corresponding to the torque command limited to the limit value or less and supplying the driving power to the motor;
- and
- temporarily increasing the limit value in response to communication between the internal space and the external space.
Dependencies are inferred from the claim text.