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US 2013/0154538 A1Published application
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.
Claims34
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 a motor position and motor speed obtained by calculating, from one of a motor position and motor speed detected by a position detector and a speed detector attached to the motor, the other of the motor position and the motor speed and an operation command from the host controller, wherein
- the host controller includes a safety monitoring unit configured to determine, with respect to motor rotation state estimation information input from the motor control apparatus, whether an operation command output to the motor control apparatus and a motor position input from the motor control apparatus or, if motor speed is input from the motor control apparatus, a motor position calculated from the motor speed or motor speed input from the motor control apparatus or, if a motor position is input from the motor control apparatus, motor speed calculated from the motor position can be regarded as same within an error range or whether the operation command and the motor position or the motor speed are within a limit range, and
- the motor control apparatus includes:
- 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 safety monitoring unit configured to determine, with respect to the motor rotation state estimation information output by the motor-rotation-state estimating unit, whether an operation state of the motor is normal according to whether an operation command from the host controller and the detected motor position or a motor position calculated from the detected motor speed or the detected motor speed or motor speed calculated from the detected motor position can be regarded as same within an error range or whether the operation command and the motor position or the motor speed are within a limit range.
5 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 estimated based on an electric current and a voltage to the motor and an operation command from the host controller, wherein
- the host controller includes a safety monitoring unit configured to determine, with respect to motor rotation state estimation information input from the motor control apparatus, whether an operation command output to the motor control apparatus can be regarded as same within an error range or whether the operation command is within a limit range, and
- the motor control apparatus includes:
- 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 safety monitoring unit configured to determine, with respect to the motor rotation state estimation information output by the motor-rotation-state estimating unit, whether an operation state of the motor is normal according to whether an operation command input from the host controller can be regarded as same within an error range or whether the operation command is within a limit range.
5 more elements
A safety monitoring method for a motor control system including:
- a host controller configured to output an operation command;
- and
- a motor control apparatus configured to drive a motor based on a motor position and motor speed obtained by calculating, from one of a motor position and motor speed detected by a position detector and a speed detector attached to the motor, the other of the motor position and the motor speed and an operation command from the host controller,
- the safety monitoring method for the motor control system comprising a step in which each of the host controller and the motor control apparatus determines, 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 whether the operation command and the detected motor position or a motor position calculated from the detected motor speed or the detected motor speed or motor speed calculated from the detected motor position can be regarded as same within an error range or whether the operation command and the motor position or the motor speed are within a limit range.
1 more element
A safety monitoring method for a motor control system including:
- 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 estimated based on an electric current and a voltage to the motor and an operation command from the host controller,
- the safety monitoring method for the motor control system comprising a step in which each of the host controller and the motor control apparatus determines, with respect to motor rotation state estimation information estimated based on the electric current and the voltage to the motor, whether an operation state of the motor is normal according to whether the operation command can be regarded as same within an error range or whether the operation command is within a limit range.
1 more element
Dependencies are inferred from the claim text.