JP5532074B2 - Door drive control method - Google Patents

Description

  The present invention relates to a door drive control device and a door drive control method for driving, for example, a railcar door at a predetermined speed by a motor operated by a power converter.

  Conventionally, when driving a door using a synchronous motor, a method is known in which the position of a magnetic pole of the synchronous motor is detected by a position detector, the speed is calculated from the detected magnetic pole position, and the speed of the synchronous motor is controlled.

  According to this method, when the actual magnetic pole position and the magnetic pole position information used for control deviate for some reason (referred to as magnetic pole position deviation), there is insufficient thrust relative to the door speed command value, the door stops, and further the speed command value. An abnormal situation such as a door runaway (referred to as reverse runaway) in the direction opposite to the direction of movement commanded may occur.

As a countermeasure against such an abnormal situation, a door opening and closing device described in Patent Document 1 is known.
In the door opening and closing apparatus described in Patent Document 1, a case where the speed detection value of the synchronous motor exceeds a first set value having a polarity opposite to the speed command value is determined as reverse runaway.

  Then, the armature winding of the synchronous motor is short-circuited by a switch to brake the door, or the switching element of the upper or lower arm of the power converter that drives the synchronous motor is turned on to make the output voltage zero. (Zero voltage output) to short-circuit the armature winding of the motor and brake the door. In addition, it is also described that the door braking operation is performed until the door speed drops below the second set value.

  By the above measures, even if the door is in the reverse runaway state due to the magnetic pole position deviation, this is immediately detected and the door is safely stopped.

JP 2006-158209 A (paragraphs [0020] to [0025], [0028] to [0033], FIGS. 1 to 4 etc.)

Normally, in a door drive control device for a railway vehicle, when a passenger or an obstacle is caught in the door during the closing operation, the door is reopened / closed to release the object caught in the door.
FIG. 9 shows the relationship between the speed command value and the speed detection value when the door is opened again (so-called re-opening / closing operation) because an obstacle has come into contact with the door during the closing operation.

  In this re-opening / closing operation, the door speed command value is switched from the closing direction to the opening direction to open the door, and then the door is switched from the opening direction to the closing direction to close the door. The polarity will change. At this time, since the door operates with a slight time delay with respect to the speed command value, there occurs a state in which the polarity of the speed command value and the polarity of the speed detection value are reversed as shown as c in FIG. To do.

  In the prior art of Patent Document 1, if the runaway determination speed (the first set value) is set low for safety, the polarity of the speed command value and the polarity of the speed detection value are reversed during the re-opening / closing operation. Will be mistaken as a reverse runaway state. As a result, in spite of normal operation, the door may be braked and stopped by performing a control operation during reverse runaway.

  In addition, when a passenger who rushes into the vehicle touches a door that is about to close, the polarity of the speed command value is the polarity that closes the door, whereas the polarity of the speed detection value is the polarity that opens the door. It becomes. Accordingly, in this case as well, the control device misidentifies reverse runaway in spite of normal operation, so the door is braked and stopped.

  In this way, if the door stops and can no longer close, the crew will investigate the door and lock the door before leaving the vehicle, so there is no problem in terms of safety, but it will interfere with the regular operation of the train. There was a problem.

Further, as described above, the prior art of Patent Document 1 discloses a technique for braking a door with a zero voltage output when the door actually reversely runs away due to a magnetic pole position misalignment or the like.
However, when the door runs away in the opening direction and bounces back in the fully open position without stopping until the fully open position, the speed detection value becomes zero at the moment when the door bounces in the fully open position. At this time, since the control device cancels the zero voltage output of the power converter, the power converter is gated off, and the motor enters a free-run state. Therefore, the braking of the motor is delayed, and there is a risk of passengers being caught by the door and being injured.

Furthermore, when an erroneous position detection value is taken into the control device due to a failure of the magnetic pole position detector and, as a result, a reverse runaway state is mistaken, the following problem occurs.
That is, in this case, since the door is not actually running away, the control device continues to misunderstand the reverse runaway state even if the power converter outputs zero voltage. As a result, since the power converter continues to output zero voltage indefinitely, a specific switching element is fixed in an on state or an off state, and there is a problem in that deterioration of the device proceeds.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a door drive control device that can accurately detect a reverse runaway state without misidentifying. It is another object of the present invention to provide a drive control device that prevents the deterioration of equipment.

  Furthermore, another problem to be solved by the present invention is to provide a door drive control method that improves safety as compared with the prior art and that does not hinder regular operations such as trains.

  In order to solve the above problem, a door drive control device according to claim 1 is a power converter that is operated by feedback control using a door speed detection value and a speed command value, and the power from the power converter. And a motor such as a linear motor for driving the door to be supplied. And it is comprised so that the speed of a door may be controlled via a motor by controlling a power converter.

The door drive control device according to claim 1 predicts the door speed after a predetermined time from the acceleration detection value calculated from the speed detection value and a predetermined time and speed detection value set in advance, and the predicted speed is When a positive or negative third set speed is exceeded, an abnormality detection operation is performed that outputs a predicted speed abnormality signal when an abnormality is detected, and the abnormality detection operation is executed only for a certain period of time after the door starts operating. The abnormality detection operation is not executed after a predetermined time has elapsed .

According to a second aspect of the present invention, a door speed after a predetermined time is predicted from an acceleration detection value calculated from the speed detection value, a predetermined time and a speed detection value set in advance, and the predicted speed is positive or negative. When the third set speed is exceeded, an abnormality detection operation is performed to determine that an abnormality is detected and output a predicted speed abnormality signal, and the abnormality detection operation is executed only for a certain period of time after the door starts to operate. After the time elapses, the abnormality detection operation is not executed if the difference between the speed command value and the speed detection value is within a threshold value .

The door drive control method according to claim 5 performs the abnormality detection operation according to claim 4 only for a predetermined time after the door starts operation, and does not execute the abnormality detection operation after the predetermined time has elapsed. It is characterized by that.

  In other words, if the detected magnetic pole position is small and the speed detection value does not increase until it can be determined that the runaway occurs within the predetermined time, then the difference between the speed command value and the speed detection value is not within the threshold value. Thus, if the speed detection value does not follow the speed command value, a sign of runaway can be detected, and runaway can be reliably detected.

According to the present invention, when a magnetic pole position deviation occurs, it is possible to accurately detect a reverse runaway state without misidentification.
In addition, it is possible to provide a door drive control device and a door drive control method that can improve safety for the user and do not damage equipment or interfere with operation.

It is a block diagram which shows 1st Embodiment of the door drive control apparatus of this invention. It is a flowchart which shows 1st Embodiment of the door drive control method of this invention. It is a block diagram which shows 2nd Embodiment of the door drive control apparatus of this invention. It is a flowchart which shows 2nd Embodiment of the door drive control method of this invention. It is a flowchart which shows 3rd Embodiment of the door drive control method of this invention. It is a flowchart which shows 4th Embodiment of the door drive control method of this invention. It is a flowchart which shows 5th Embodiment of the door drive control method of this invention. It is a flowchart which shows 6th Embodiment of the door drive control method of this invention. It is a figure which shows the relationship between the speed command value and speed detection value at the time of the door reopening / closing operation | movement.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing a first embodiment of a door drive control device.
In FIG. 1, reference numeral 1 denotes a door, which is connected to a door driving linear motor 2 via a connecting portion 3. The linear motor 2 is connected to the door drive control device 10A.

  The position of the door 1 is detected by a position detector 5. Further, an output current detector 4 detects an output current of two phases (for example, a U phase and a W phase) of a power converter 14 described later provided in the door drive control device 10A.

The door drive control device 10 </ b> A includes a speed calculator 11, a speed controller 12, a current controller 13, a power converter 14, and a door speed abnormality determiner 15.
The speed calculator 11 calculates the speed of the door 1 using the position detection value output from the position detector 5 and outputs it as a speed detection value. The speed controller 12 feedback-controls the speed using the speed command value and the speed detection value, and calculates and outputs a current command value.

  The speed command value and the speed detection value are also input to the door speed abnormality determiner 15. The door speed abnormality determination unit 15 generates a door reverse direction speed abnormality signal a based on the speed command value and the speed detection value and sends it to the current controller 13. The detailed operation of the door speed abnormality determiner 15 will be described later.

  The current controller 13 performs current feedback control using the current command value, the current detection value, and the position detection value, and calculates and outputs a voltage command value. This voltage command value is given to the power converter 14.

  The power converter 14 performs a power conversion operation by turning on and off an internal switching element, supplies a voltage according to a voltage command value to the linear motor 2, and drives the linear motor 2. In addition, the power converter 14 is cut off from the power source 20 by the operation of the emergency handle 21, and is configured to be in an emergency stop.

  Next, a first embodiment of the door drive control method using the door drive control device 10A of FIG. 1 will be described using the flowchart of FIG. This first embodiment is characterized by the detection operation of the reverse runaway state of the door 1, and is executed by the door speed abnormality determination unit 15 in FIG.

  Here, the polarity of the speed in the direction of opening the door 1 is positive, the polarity of the speed in the direction of closing the door 1 is negative, and the setting speed 1 (first setting speed) and the setting speed 2 (second setting) in FIG. (Speed) is a speed represented by a preset absolute value.

  In FIG. 2, when the speed command value exceeds the positive set speed 1, the process proceeds to step S202 (S201, YES). In step S202, it is determined whether or not the speed detection value is less than a negative set speed 2 that is opposite in polarity to the speed command value. If the speed detection value is less than a negative set speed 2 (S202, YES) ), It is determined that the reverse runaway state occurs, and the door reverse speed abnormal signal a is set (S203). If the speed detection value is not less than the negative set speed 2, the process ends (S202, NO).

  That is, when the speed command value is given by the polarity for opening the door 1 and the speed detection value is the polarity for closing the door 1 and is less than the set speed 2, the door reverse direction speed abnormality signal a is Set.

  When the speed command value does not exceed the positive set speed 1, the process proceeds to step S204 (S201, NO). In step S204, it is determined whether or not the speed command value is less than the negative set speed 1, and if the speed command value is less than the negative set speed 1 (S204, YES), the process proceeds to step S205.

  If the speed command value is not less than the negative set speed 1 (S204, NO), the process ends. That is, when the speed command value does not exceed the set speed 1 in both the opening direction and the closing direction, the abnormality detection operation (reverse runaway detection operation) using the speed detection value and the set speed is not performed.

  In step S205, it is determined whether or not the speed detection value exceeds the positive set speed 2, and if the speed detection value exceeds the positive set speed 2 (S205, YES), it is determined that a reverse runaway state has occurred. The door reverse direction speed abnormality signal a is set (S206). If the detected speed value does not exceed the positive set speed 2, the process is terminated (S205, NO).

  The door reverse speed abnormality signal a output from the door speed abnormality determiner 15 in FIG. 1 is sent to the current controller 13. When the door reverse speed abnormal signal a is input to the current controller 13, for example, a voltage command value that makes the output voltage of the power converter 14 zero is output.

By the operation as described above, according to this embodiment, there is no possibility of misrecognizing the reverse runaway state due to the difference in polarity between the speed command value and the speed detection value as shown in FIG.
That is, in the operation of FIG. 2, when the speed command value does not exceed the positive or negative set speed 1, the abnormality detection operation is not performed. In other words, the abnormality detection operation is performed only when the speed command value exceeds the positive or negative set speed 1.

  That is, if the set speed 1 is set to an appropriate value, the door reverse direction in a region where the polarity of the speed command value and the speed detection value is different (region c where the speed command value is relatively small as shown in FIG. 9). The determination of speed abnormality can be avoided, and misidentification of the reverse runaway state can be avoided.

Next, a second embodiment of the door drive control device will be described with reference to the block diagram of FIG.
In FIG. 3, the same components as those in FIG. 1 are denoted by the same reference numerals, and the following description will focus on parts different from those in FIG.

  In the door drive control device 10B of the second embodiment, the acceleration calculator 16 that calculates acceleration from the detected speed value, and the predicted door speed that detects and outputs the predicted door speed abnormality signal b using the detected acceleration value and the detected speed value. An abnormality determiner 17 is provided. The predicted door speed abnormal signal b is input to the current controller 13. The other configuration is the same as that of FIG. 1 except for the door speed abnormality determiner 15.

  Next, a second embodiment of the door drive control method using the door drive control device 10B of FIG. 3 will be described using the flowchart of FIG. This second embodiment is characterized by a detection operation for predicting the runaway of the door 1, and is executed by the door predicted speed abnormality determiner 17 in FIG.

  Here, the set speed 3 in FIG. 4 is a speed represented by a preset absolute value, and the polarity of the speed in the direction of opening the door 1 is positive, and the polarity of the speed in the direction of closing the door 1 is negative. . The predicted time is a preset time (for example, several seconds).

First, the predicted speed at the time point when the predicted time has elapsed from the present time is calculated by Equation 1 (S401).
[Formula 1]
Predicted speed = speed detection value + acceleration detection value × prediction time Here, the speed detection value is calculated by the speed calculator 11 of FIG. 3, and the acceleration detection value is calculated by the acceleration calculator 16.

Next, it is determined whether or not the predicted speed exceeds the positive set speed 3, and if it exceeds (S402, YES), the predicted door speed abnormal signal b is set (S403).
If the predicted speed does not exceed the positive set speed 3 (S402, NO), it is determined whether the predicted speed is less than the negative set speed 3 (S404). If the predicted speed is less than the negative set speed 3 (S404, YES), the door predicted speed abnormality signal b is set (S405). If the predicted speed is not less than the negative set speed 3 (S404, NO), the process ends.

  That is, in FIG. 4, when the predicted speed exceeds the positive or negative set speed 3, the door predicted speed abnormality signal b is set. This door predicted speed abnormality signal b is sent to the current controller 13 as shown in FIG. When the predicted door speed abnormality signal b is input to the current controller 13, for example, a voltage command value that sets the output voltage of the power converter 14 to zero is output.

  In the operation of FIG. 2 described above, when the passenger puts his hand on the door 1 that is about to close and opens the door 1, as a result, the polarity of the speed command value and the polarity of the speed detection value are different. It is difficult to distinguish the movement from a true reverse runaway state. The reason is that when the passenger puts their hand on the door 1 that is about to close and opens the door 1, the speed detection value in step S205 in FIG. This is because the door reverse direction speed abnormality signal a is set.

  In this case, in order to prevent misrecognition of a reverse runaway state, it is sufficient to increase the set speed 2. However, in such a case, even if the reverse runaway actually occurs, the tradeoff is that the runaway cannot be stopped until the set speed 2 is exceeded. Cause problems.

On the other hand, according to the operation of FIG. 4 in the second embodiment, unlike the first embodiment, the polarity of the speed command value and the speed detection value is not taken into consideration, and thus the above problem does not occur.
Also, for example, by using a predicted speed several seconds ahead, unlike a simple overspeed detection method that determines whether the speed detection value exceeds the set speed, a runaway state is detected before the runaway door reaches the critical speed. There is an advantage that you can.

  Next, a third embodiment of the door drive control method using the door drive control device 10A of FIG. 1 will be described using the flowchart of FIG. In the third embodiment, when the reverse runaway state of the door 1 is detected, the current controller 13 in FIG. 1 causes the power converter 14 to output a zero voltage.

  The third embodiment can also be realized as a door drive control method using the door drive control device 10B of FIG. In that case, the door reverse speed abnormality signal a in FIG. 5 may be replaced with the door reverse direction predicted speed abnormality signal b.

  In FIG. 5, first, the current controller 13 of FIG. 1 determines whether or not there is a door reverse speed abnormal signal a (S501). When it is detected that there is a door reverse speed abnormal signal a (S501, YES), the current controller 13 starts measuring the time by the timer, and the measurement time (hereinafter referred to as timer value) is within the set time 1. It is determined whether or not there is (S502). If the door reverse speed abnormal signal a is not output (S501, NO), the process is terminated.

  Until the timer value reaches the set time 1 (YES in S502), the current controller 13 outputs a voltage command value that makes the output voltage of the power converter 14 zero, and performs zero voltage output ( S503). This zero voltage output can be realized by turning on all the switching elements of the upper arm or the lower arm constituting the power converter 14. Thereafter, the timer value is added, that is, the clocking operation is continued (S504).

  Also, if the timer value has passed the set time 1 (S502, NO), the zero voltage output is stopped (S505), and a command value for turning off the power converter 14 is output (S506).

  As described above, in the third embodiment of the door drive control method, when the current controller 13 detects the reverse runaway of the door 1 based on the door reverse speed abnormal signal a, the set time 1 is set regardless of the speed of the door 1. Meanwhile, the door 1 is braked by outputting zero voltage.

  For this reason, even when the door 1 runs away in the opening direction and bounces back at the fully open position without stopping until the fully open position, there is no possibility that the zero voltage output is stopped and a free run state is caused by gate-off. That is, since the door 1 can be braked reliably, it is possible to reduce the possibility of passengers being caught and injured.

  Even when the reverse runaway state is erroneously recognized based on an erroneous position detection value due to a failure of the position detector of the motor 2, the zero voltage output is stopped after the set time 1 has elapsed. Thereby, it can prevent that the switching element which comprises the power converter 14 is fixed in an ON or OFF state, and can prevent degradation of an apparatus.

  Next, a fourth embodiment of the door drive control method using the door drive control device 10A of FIG. 1 will be described using the flowchart of FIG. In this embodiment, other processing steps are added to the processing of the first embodiment shown in the entire flowchart of FIG. 2 (shown as step S603 in FIG. 6).

  In addition, this 4th Embodiment is realizable also as a door drive control method using the door drive control apparatus 10B of FIG. In that case, step S603 in FIG. 6 may be replaced with the process of the second embodiment shown in the entire flowchart of FIG.

First, the power converter 14 in FIG. 1 is turned on during the operation of the door 1 and is turned off when the door 1 reaches the fully open position or is locked in the fully open position.
For this reason, in FIG. 6, it is first determined whether or not the gate is on (S601). If the gate is on (S601, YES), the timer starts measuring time. That is, the elapsed time after the door 1 starts operating is measured.

During the period until the timer value reaches the preset set time 2 (S602, YES), the processing of the first embodiment shown in FIG. 2 is executed (S603), and the timer value is added (S604).
If the timer value exceeds the set time 2 (S602, NO), the process of the first embodiment (S603) is terminated without being executed. If the gate is not turned on in step S601 (S601, NO), the timer value is cleared and the process ends (S605).

  As described above, in the fourth embodiment, the reverse runaway detection operation is performed according to the first embodiment only during the set time 2 after the start of the operation due to gate-on, and the reverse runaway detection operation is not performed after the set time 2 has elapsed.

  For example, when the position detector 5 shown in FIG. 1 is replaced and the magnetic pole detection position of the linear motor 2 is displaced by the position detector 5 and the magnetic pole position is not correctly reset, the door 1 There is a risk of reverse runaway immediately after the start of operation. In such a case, in the fourth embodiment, reverse runaway can be detected within the set time 2 and the linear motor 2 can be safely stopped.

  In addition, when reverse runaway is not detected within the set time 2 and the speed detected value in the direction opposite to the speed command value is obtained by the passenger's door operation after the set time 2 has elapsed, the passenger's door is not the magnetic pole position deviation. As a normal operation by operation, the operation can be continued without stopping the door 1. In other words, it is possible to prevent misidentification as a reverse runaway state.

  Next, a fifth embodiment of the door drive control method using the door drive control device 10A of FIG. 1 will be described using the flowchart of FIG. In this embodiment, other processing steps are added to the processing of the first embodiment shown in the entire flowchart of FIG. 2 (shown as step S706 in FIG. 7).

  The fifth embodiment can also be realized as a door drive control method using the door drive control device 10B of FIG. In that case, step S706 in FIG. 7 may be replaced with the process of the second embodiment shown in the entire flowchart of FIG.

  In FIG. 7, as in the fourth embodiment, first, it is determined whether or not the gate is turned on (S701). If the gate is turned on (S701, YES), time measurement by a timer is started. That is, the elapsed time after the door 1 starts operating is measured.

Then, during the period until the timer value reaches the preset setting time 3 (S702, YES), the abnormality detection execution flag is set (S703), and the timer value is added (S704).
When the timer value reaches the set time 3 (S702, NO and S707, YES), it is determined whether Equation 2 is satisfied (S708).

[Formula 2]
| (Speed command value)-(Speed detection value) |> (Speed detection threshold)
Here, the speed detection threshold value is a preset value.

When Formula 2 is satisfied (S708, YES), an abnormality detection execution flag is set (S709), and a timer value is added (S704).
When the condition of Formula 2 is not satisfied (S708, NO), the abnormality detection execution flag is reset (S710), and the timer value is added (S704).

  Further, the presence / absence of an abnormality detection execution flag is determined (S705). If the abnormality detection execution flag is set (S705, YES), the processing of the first embodiment shown in FIG. 2 is executed (S706). If the abnormality detection execution flag is not set (S705, NO), the process ends without executing the process of the first embodiment.

If it is determined in step S701 that the gate is not on (S701, NO), the timer value is cleared and the process ends (S711).
Thus, in the fourth embodiment described above, the door reverse speed abnormality detection operation (S603) is performed only during the set time 2, whereas in the fifth embodiment, the door is set during the set time 3 after the operation is started. In addition to performing the reverse speed abnormality detection operation (S706), the following processing is also performed. That is, the process is to determine whether the speed detection value can follow the speed command value when the set time 3 has elapsed, using the speed detection threshold, and according to the result, after the elapse of the set time 3 This is to determine whether or not an abnormality detection operation is performed (S707 to S710).

  For this reason, even if the deviation of the magnetic pole position is small and the speed detection value does not increase until it is determined that reverse runaway occurs within the set time 3, a sign of reverse runaway can be detected. Then, since the reverse runaway is continuously detected even after the set time 3 elapses thereafter, it is possible to prevent the detection failure of the reverse runaway state.

Finally, a sixth embodiment of the door drive control method using the door drive control device 10A of FIG. 1 and the door drive control device 10B of FIG. 3 will be described using the flowchart of FIG.
When the position detector 5 is replaced during work such as installation or maintenance of the door 1 (hereinafter referred to as inspection and maintenance work), it is easy to forget to reset the magnetic pole position correctly thereafter. For this reason, the occurrence probability of reverse runaway due to magnetic pole position deviation is high. Further, during these operations, there is no problem such as a delay in operation due to the door 1 being stopped as in a commercial operation. Therefore, when performing the maintenance work of the door and verifying the work result, it is desirable that the reverse runaway can be detected even at a low speed, particularly focusing on safety.

The sixth embodiment described below takes the above points into consideration.
For example, in a railway vehicle, it is common to stop energization of the linear motor 2 when performing a door inspection and maintenance work.

  As a method for stopping the energization of the linear motor 2, the power source 20 supplied to the power converter 14 is shut off, or the emergency handle 21 in FIGS. 1 and 3 is operated to operate the power source 20 and the power converter 14. And there is a method of shutting off. Which of these shut-off methods is executed can be easily determined by grasping operation state signals of the power source 20 and the emergency handle 21.

  Therefore, in this embodiment, in FIG. 8, it is determined whether or not it is immediately after the power source 20 is shut off and the cutoff is released (hereinafter referred to as “power on”) (S801). If it is determined that the power has just been turned on (YES in S801), it is determined that the power has been turned on in order to verify the work result during the inspection and maintenance work, and the first embodiment of the door drive control method described above (FIG. 2) One of the third to fifth embodiments (FIGS. 5 to 7) is executed (S802). That is, an abnormality detection operation using the door reverse direction speed abnormality detection signal a is executed.

  If it is determined that it is not immediately after the power is turned on (S801, NO), the operation of the emergency handle 21 (the emergency handle 21 is operated to shut off the power source 20 and the power converter 14, and then the power source 20 is powered again. It is determined whether or not it is immediately after the operation for connecting to the converter 14 (S803).

  If it is determined that the emergency handle 21 has just been operated (S803, YES), similarly to the above, it is determined that power has been turned on to verify the work result during the inspection and maintenance work, and the door drive control method Any one of the first embodiment (FIG. 2) and the third to fifth embodiments (FIGS. 5 to 7) is executed (S804). That is, an abnormality detection operation using the door reverse direction speed abnormality detection signal a is executed.

  In step S803, if it is not determined that the emergency handle 21 has just been operated (NO in step S803), it is determined that the operation is not normal but not normal, and the second embodiment of the door drive control method described above is performed. (FIG. 4) is executed (S802). That is, an abnormality detection operation using the predicted door speed abnormality detection signal b is executed.

  As described above, in the present embodiment, an abnormality detection operation using the door reverse speed abnormality detection signal a is performed during inspection and maintenance work, and an abnormality detection operation using the door predicted speed abnormality detection signal b is performed during normal operation. .

  By switching the abnormality detection operation in this way, a true reverse runaway can be reliably detected at a low speed although there is a high possibility of misrecognizing reverse runaway during inspection and maintenance work. Further, during normal operation, it is possible to appropriately detect the true runaway state while ensuring safety and reducing the possibility of misidentifying the runaway state.

1: Door 2: Linear motor 3: Connection unit 4: Output current detector 5: Position detector 10A, 10B: Door drive control device 11: Speed calculator 12: Speed controller 13: Current controller 14: Power converter 15: Door speed abnormality determination device 16: Acceleration calculator 17: Door predicted speed abnormality determination device

Claims (2)

A door drive control method for operating a power converter that supplies power to a door driving motor by feedback control using a door speed detection value and a speed command value, and controlling the speed of the door driven by the motor In
Predicts the door speed after a predetermined time from an acceleration detected value with a preset predetermined time and the speed detection value calculated from the speed detected value, the prediction rate of positive or negative third set speed If it exceeds, perform an abnormality detection operation that outputs an estimated speed abnormality signal by judging that it is abnormal, and after the door has started to operate, the abnormality detection operation is executed only for a certain period of time. The door drive control method, wherein the abnormality detection operation is not executed . A door drive control method for operating a power converter that supplies power to a door driving motor by feedback control using a door speed detection value and a speed command value, and controlling the speed of the door driven by the motor In
Predicts the door speed after a predetermined time from an acceleration detected value with a preset predetermined time and the speed detection value calculated from the speed detected value, the prediction rate of positive or negative third set speed If it exceeds, perform an abnormality detection operation that outputs an estimated speed abnormality signal by judging that it is abnormal, and after the door has started to operate, the abnormality detection operation is executed only for a certain period of time. If the difference between the speed command value and the speed detection value is within a threshold, the abnormality detection operation is not executed .

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