Door drive control apparatus and door drive control method

A door drive control apparatus comprising:

• a power converter configured to supply power to a door drive motor;
• a control circuit configured to operate the power converter by feedback control using a speed detection value and a speed command value of a door, and to control a speed of the door driven by the motor;
• an acceleration calculator that calculates an acceleration of the door using the speed detection value;
• and
• a trouble determiner that predicts a speed of the door after a predetermined time, from an acceleration detection value output from the acceleration calculator and the speed detection value and, in the event that the predicted speed exceeds either a positive or negative third setting speed, outputs a predicted speed trouble signal.

A door drive control method comprising:

• operating a power converter, which supplies power to a door drive motor, by feedback control using a speed detection value and a speed command value of a door;
• executing a trouble detection operation, including determining that the door is moving in a direction opposite to a movement direction according to the speed command value if the speed command value exceeds either a positive or negative first setting speed and the speed detection value also exceeds a second setting speed of a polarity opposite to that of the speed command value;
• outputting a speed trouble signal according to a result of the trouble detection operation;
• controlling an operation of the power converter using the speed trouble signal;
• and
• controlling a speed of a door driven by the motor.

A door drive control method comprising:

• operating a power converter, which supplies power to a door drive motor, by feedback control using a speed detection value and a speed command value of a door;
• calculating an acceleration detection value from the speed detection value and the speed command value;
• executing a trouble detection operation, including predicting a speed of the door after a predetermined time from the acceleration detection value, and if the predicted speed exceeds either a positive or negative third setting speed, determining that there is trouble;
• outputting a speed trouble signal according to a result of the trouble detection operation;
• controlling an operation of the power converter using the speed trouble signal;
• and
• controlling a speed of a door driven by the motor.

A door drive control method comprising:

• operating a power converter, which supplies power to a door drive motor, by feedback control using a speed detection value and a speed command value of a door;
• selecting one of a first and a second trouble detection operation, according to whether a time is a regular operation time or an inspection and servicing operations time;
• executing the selected trouble detection operation;
• outputting a speed trouble signal according to a result of the selected trouble detection operation;
• controlling an operation of the power converter using the speed trouble signal;
• and
• controlling a speed of a door driven by the motor;
• the first trouble detection operation including determining that the door is moving in a direction opposite to a movement direction according to the speed command value, if the speed command value exceeds either a positive or negative first setting speed and the speed detection value also exceeds a second setting speed of a polarity opposite to that of the speed command value;
• and
• the second trouble detection operation including calculating an acceleration detection value from the speed detection value and the speed command value, predicting a speed of the door after a predetermined time from the acceleration detection value, and if the predicted speed exceeds either a positive or negative third setting speed, determining that there is trouble.