Door drive control apparatus and door drive control method

1. 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; and

a trouble determiner which outputs a speed trouble signal in the event that the speed command value exceeds either a positive or negative first setting speed, and the speed detection value exceeds a second setting speed of a polarity opposite to that of the speed command value.

2. The door drive control apparatus according to claim 1 , further comprising:

a speed controller that calculates a current command value in such a way that the speed detection value matches the speed command value, and

a current controller that generates a voltage command value of the power converter, using the current command value, an output current detection value of the power converter, and a position detection value of the door.

3. The door drive control apparatus according to claim 2 , wherein the speed trouble signal is input into the current controller.

4. 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 the 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,

wherein the trouble determiner is configured to operate for a certain time only after the door starts an operation, and does not operate after the certain time elapses.

5. The door drive control apparatus according to claim 4 , further comprising:

a speed controller that calculates a current command value in such a way that the speed detection value matches the speed command value; and

a current controller that generates a voltage command value of the power converter, using the current command value, an output current detection value of the power converter, and a position detection value of the door.

6. The door drive control apparatus according to claim 5 , wherein the predicted speed trouble signal is input into the current controller.

7. 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 the door driven by the motor.

8. The door drive control method according to claim 7 , further comprising: when the speed trouble signal is outputted, making an output voltage of the power converter zero for a certain period, and causing the motor to put a brake on a power generation.

9. The door drive control method according to claim 7 , further comprising: executing the trouble detection operation for a certain time only after the door starts an operation, but not executing the trouble detection operation after the certain time elapses.

10. The door drive control method according to claim 7 , further comprising: executing the trouble detection operation for a certain time only after the door starts an operation, but not executing the trouble detection operation after the certain time elapses, in the event that a difference between the speed command value and the speed detection value is no more than a threshold value.

11. 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;

executing a trouble detection operation, including predicting from the acceleration detection value a speed of the door after a predetermined time, and if the predicted speed exceeds either a positive or negative third setting speed, determining that there is trouble;

wherein the trouble detection operation is executed for a certain time only after the door starts an operation, and the trouble detection operation is not executed after the certain time elapses;

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 the speed of the door driven by the motor.

12. The door drive control method according to claim 11 , further comprising: when the speed trouble signal is outputted, making an output voltage of the power converter zero for a certain period, and causing the motor to put a brake on a power generation.

13. The door drive control method according to claim 11 , wherein: the trouble detection operation is executed for a certain time only after the door starts an operation and not executed after the certain time elapses only in the event that a difference between the speed command value and the speed detection value is no more than a threshold value.

14. 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 the 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, predicting from the acceleration detection value the speed of the door after a predetermined time, and if the predicted speed exceeds either a positive or negative third setting speed, determining that there is trouble; wherein the second trouble detection operation is executed for a certain time only after the door starts an operation, and the second trouble detection operation is not executed after the certain time elapses.