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US 9,110,451 B2Granted
Motor control system and safety monitoring system therefor
AssigneeMitsubishi Electric Corporation
InventorKenji Ogawa
Life of this patent
Estimating the term…
Abstract
Each of a host controller and a motor control apparatus included in a motor control system that drives a motor includes a step of determining, with respect to motor rotation state estimation information estimated based on an electric current and a voltage to the motor, whether an operation state of the motor is normal according to what kind of a relation an operation command output by the host controller and a detected motor position or motor speed have.
Claims30
A motor control system comprising:
- a host controller configured to output an operation command;
- a detector configured to detect a motor position or a motor speed of a motor, wherein detection information comprises:
- a detected motor position being the motor position detected by the detector when the detector is a position detector, or being calculated from the motor speed detected by the detector when the detector is a speed detector;
- and
- a detected motor speed being the motor speed detected by the detector when the detector is the speed detector, or being calculated from the motor position detected by the detector when the detector is the position detector;
- and
- a motor control apparatus configured to drive the motor based on the detection information and the operation command from the host controller, wherein:
- the host controller comprises a first safety monitoring unit configured to determine whether or not motor rotation state estimation information input from the motor control apparatus, the operation command output to the motor control apparatus, and the detection information are consistent with each other to determine whether an operation state of the motor is normal or not, and
- the motor control apparatus comprises:
- a motor-rotation-state estimating unit configured to output the motor rotation state estimation information estimated based on an electric current and a voltage to the motor;
- and
- a second safety monitoring unit configured to determine, whether or not the motor rotation state estimation information output by the motor-rotation-state estimating unit, the operation command from the host controller, and the detection information are consistent with each other to determine whether an operation state of the motor is normal or not.
9 more elements
A motor control system comprising:
- a host controller configured to output an operation command;
- and
- a motor control apparatus configured to drive a motor based on an estimated position and estimated speed of a motor, which are estimated based on an electric current and a voltage to the motor, and the operation command from the host controller, wherein:
- the host controller comprises a first safety monitoring unit configured to determine whether or not motor rotation state estimation information input from the motor control apparatus and the operation command output to the motor control apparatus are consistent with each other to determine whether an operation state of the motor is normal or not, and
- the motor control apparatus comprises:
- a motor-rotation-state estimating unit configured to output the motor rotation state estimation information estimated based on the electric current and the voltage to the motor;
- and
- a second safety monitoring unit configured to determine whether or not the motor rotation state estimation information output by the motor-rotation-state estimating unit and the operation command input from the host controller are consistent with each other to determine whether an operation state of the motor is normal or not.
5 more elements
A safety monitoring method in a motor control system,
- the motor control system comprising:
- a host controller configured to output an operation command;
- a detector configured to detect a motor position or a motor speed of a motor,
- wherein detection information comprises:
- a detected motor position being the motor position detected by the detector when the detector is a position detector, or being calculated from the motor speed detected by the detector when the detector is a speed detector;
- and
- a detected motor speed being the motor speed detected by the detector when the detector is the speed detector, or being calculated from the motor position detected by the detector when the detector is the position detector;
- and
- a motor control apparatus configured to drive the motor based on the detection information and the operation command from the host controller,
- the safety monitoring method comprising:
- estimating, by the motor control apparatus, motor rotation state estimation information based on an electric current and a voltage to the motor;
- and
- determining, by each of the host controller and the motor control apparatus, whether or not the motor rotation state estimation information, the operation command, and the detection information are consistent with each other to determine whether an operation state of the motor is normal or not.
10 more elements
A safety monitoring method in a motor control system,
- the motor control system comprising:
- a host controller configured to output an operation command;
- and
- a motor control apparatus configured to drive a motor based on an estimated position and estimated speed of a motor, which are estimated based on an electric current and a voltage to the motor, and the operation command from the host controller, the safety monitoring method:
- estimating, by the motor control apparatus, motor rotation state estimation information based on the electric current and the voltage to the motor;
- and
- determining, by each of the host controller and the motor control apparatus, whether or not the motor rotation state estimation information and the operation command are consistent with each other to determine whether an operation state of the motor is normal or not.
4 more elements
Dependencies are inferred from the claim text.