JP2003104677A - Escalator control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately detect whether a motor is in an antiphase state even when the load of the motor currently used in an escalator is light, while attaining space saving in a control panel. SOLUTION: A U-phase current value signal and a W-phase current value signal are generated by two current sensors 8a, 8b. On the basis of the U-phase current value signal, an antiphase detector 10 obtains deviation Δθ by making the operation shown by an equation 12, an equation 13 and an equation 14 and then obtains an internal phase angle θ0 by making the PLL operation shown by an equation 15, and determines whether the escalator is operated in the antiphase by checking whether the changed direction of deviation Δθ0 to the internal phase angle θ0 is in consistency with the operating direction of the escalator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an escalator control system for controlling an escalator, and more particularly to an escalator control system for detecting the presence / absence of reverse phase operation of an escalator using a phase current of a motor driving the escalator.

[0002]

2. Description of the Related Art When an escalator is installed or an escalator is adjusted, a motor current may be in a reverse phase due to a wiring error or the like, and a means for detecting it may be necessary. .

In the conventional technique, as shown in FIG. 9, a 3E relay (relay for detecting three kinds of abnormalities of reverse phase, overload, and open phase) 102 is mounted in a control panel 101 to drive an escalator. I checked if the motor is in reverse phase and stopped the escalator when the escalator was in reverse phase.

In recent years, the 3E relay 102 has been abolished and an escalator control system for detecting a reverse phase using a current sensor is often used.

In this escalator control system, the U-phase and W-phase detection currents output from the shunts provided in the three-phase electric wires supplied to the motor for driving the escalator are supplied to the current sensor provided in the control panel. It conducts current / voltage conversion to generate a U-phase current value signal and a W-phase current value signal, and also guides these U-phase current value signal and W-phase current value signal to a microcomputer, After calculating the V-phase current waveform, these U-phase current waveform, W-phase current waveform,
Based on the V-phase current waveform, a composite waveform of the three-phase current waveforms is obtained, and this composite waveform is compared with a preset "reverse phase determination threshold value" to determine whether it is in a reverse phase state. When it is determined that the phase is reversed, the escalator is immediately stopped.

[0006]

However, the conventionally known escalator control system has the following problems.

First, in the escalator control system that uses the 3E relay 102 to determine whether the escalator is in the reverse phase state, the 3E relay 102 must be installed in the control panel 101 having a limited space. Since it is necessary to save space on the control panel,
There was a problem that it deviated from the current technological direction.

Further, in the escalator control system of a system in which a U-phase current value signal and a W-phase current value signal are generated by using a current sensor and a microcomputer detects a reverse phase state, the motor is supplied with 3 When the composite wave of the phase current waveform is created and the value of this composite wave is below the preset "reverse phase judgment threshold value", it is judged that the phase is in reverse phase and the escalator is immediately I'm trying to stop.

For this reason, when the load is light with respect to the motor current, for example, when the motor current value is small, such as when the step is pulled out and adjustment operation is performed, the peak value of the composite wave becomes small. Therefore, even if the escalator is operating normally, it has fallen below the “negative phase determination threshold”.
There is a problem in that it is erroneously detected when it is in a reverse phase state.

In view of the above circumstances, the present invention makes it possible to accurately determine whether or not the motor is in the reverse phase state even when the load of the motor used in the escalator is light, while saving space in the control panel. It is intended to provide an escalator control system that can detect.

[0011]

In order to achieve the above object, the present invention provides, in claim 1, a plurality of steps connected to each other.
In the escalator control system that drives the escalator installed between each entrance on the upper and lower floors, the current sensor detects a plurality of phase current waveforms flowing in the motor that drives the escalator, and based on the detection result of the current sensor. The reverse phase detection device calculates the rotation direction of the current vector, and based on the consistency between the rotation direction of the current vector obtained by this calculation process and the operating direction of the escalator, whether the escalator is operating in the reverse phase. Determine whether

Thus, it is possible to accurately detect whether or not the motor is in a reverse phase state even when the load of the motor used in the escalator is light, while saving space in the control panel.

According to a second aspect of the present invention, in the escalator control system according to the first aspect, the contents of the answerback signal output from the up / down drive device for driving the motor by the reverse phase detection device and the current sensor. It is checked whether or not the operation contents of the escalator obtained on the basis of the detection result correspond to each other and whether or not there is an abnormality is determined based on the check result.

This saves space in the control panel, checks the presence or absence of anomalies in the current sensor, etc., without adding special parts, even when the load on the motor used in the escalator is light. , It is possible to accurately detect whether the motor is in the reverse phase.

According to a third aspect of the present invention, in the escalator control system according to any of the first and second aspects, the output content of the pulse generator that detects the rotation of the motor by the reverse phase detection device and the detection of the current sensor. It is checked whether or not the operation contents of the escalator obtained based on the result correspond to each other, and whether there is an abnormality is determined based on the check result.

This saves space in the control panel, and uses inexpensive parts such as a pulse generator to check the current sensor and other abnormalities while checking the load on the motor used in the escalator. Even when it is light, it can accurately detect whether the motor is in the reverse phase.

According to a fourth aspect of the present invention, in the escalator control system according to any one of the first to third aspects, when the negative phase detection device determines that the escalator is operating in the negative phase, the escalator is provided in the control panel. The details of the abnormality are displayed on the displayed display device.

Thus, while saving space in the control panel, even when the load of the motor used in the escalator is light, it is possible to accurately detect whether or not the motor is in a reverse phase state, and the escalator can When stopped, the cause of the stop can be recognized simply by opening the control panel and looking at the inside.

According to a fifth aspect of the present invention, in the escalator control system according to any of the first to fourth aspects, when the reverse phase detection device determines that the escalator is operating in the reverse phase, the escalator is provided at a predetermined place. The alarm device notifies the abnormality content.

Thus, while saving space in the control panel, even when the load of the motor used in the escalator is light, it is possible to accurately detect whether or not the motor is in a reverse phase state, and the escalator When stopped, the cause of the stop can be notified by a display, a notification sound, a voice, or the like.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION << Reverse Phase Determination Algorithm >>
Prior to a detailed description of the escalator control system according to the present invention, a negative phase determination algorithm used in the escalator control system according to the present invention will be described.

First, for a general three-phase voltage, the U-phase current waveforms “Iu” and W, which form a three-phase current waveform, are expressed by the following equations.
A phase current waveform “Iw” and a V phase current waveform “Iv” can be represented.

[0023]

[Equation 1] In addition, a U-phase current waveform “Iu” that constitutes a three-phase current waveform,
The W-phase current waveform "Iw", the V-phase current waveform "Iv", and the D-phase current waveform "Id" and the Q-phase current waveform "that form a two-phase current waveform obtained by converting the three-phase current waveform into three-phase / two-phase. It is known that the following equation holds with Iq ″.

[0024]

[Equation 2] Then, one of the two-phase current waveform “I” represented by the equation (5)
By substituting the equations (4) and (1) into d ″, the following equation is obtained.

[0025]

[Equation 3] Further, the other two-phase current waveform “Iq” represented by the equation (6)
On the other hand, by substituting the equation (4), the equation (1), and the equation (2) in order, the following equation is obtained.

[0026]

[Equation 4] Then, in the trigonometric function, the following equation holds, so sin (A + B) −sin (AB) = 2sin (A) · sin (B) (9) Using this equation (9), By rearranging the above equation (8), the following equation is obtained.

[0027]

[Equation 5] Then, by combining the equation (10) with the equation (6), as shown in the following equation, a U-phase current waveform “Iu” and a W-phase current waveform “Iw” that form a three-phase current waveform are obtained. , “Cos (θ)” can be represented.

[0028]

[Equation 6] Then, as is clear from the equation (11), the equation (1), or the equation (7), as shown in the following equation, the U-phase current waveform “Iu” and the W-phase current forming the three-phase current waveform are obtained. Of the waveform “Iw” and the V-phase current waveform “Iv”, only the U-phase current waveform “Iu” and the W-phase current waveform “Iw” may represent the external phase angle “θ” that defines the three-phase current waveform. Therefore, the escalator control system according to the present invention uses the following equation to determine the external phase angle “θ”.

[0029]

[Equation 7] In addition, a U-phase current waveform “Iu” that constitutes a three-phase current waveform,
External phase angle “θ” obtained from W-phase current waveform “Iw”
And the external phase angle “θ” is set to PLL (Phase Lo
cked Loop) internal phase angle “θ”
_When the deviation “Δθ” from ₀ ”(however, Δθ = θ ₀ −θ) is small, the deviation“ Δθ ”can be obtained by the approximation formula shown below. Therefore, in the escalator control system according to the present invention, this approximation can be obtained. Using the formula, the deviation “Δ
θ ”is calculated.

[0030]

Δθ = θ ₀ −θ ≈sin (θ ₀ ) cos (θ) −sin (θ ₀ ) sin (θ) (14) Further, as the PLL calculation formula, the calculation formula shown below is known. In the escalator control system according to the present invention, the internal phase angle “θ ₀ ” necessary for making the deviation “Δθ” zero is obtained using this PLL arithmetic expression. A block diagram of this control is shown in FIG.

[0031]

Equation 9] _{Y (z) = [I G} · X (z) + P G · (X (z) -X (z) · z -1) + {I G · X (z) + P G · (X ( z) -X (z) · z -1)} · z -1] + _{[[I G · X (z)} + P G · (X (z) -X (z) · z -1) + {I G _{· X (z) + P G} · (X (z) -X (z) · z -1)} · z -1] ] · z ^-1 (15) where X (z): deviation as input data “Δθ” Y (z): internal phase angle as output data “θ0” [X]: limiter processing for variable “X” I _G : integral gain P _G : Proportional gain z ⁻¹ : Transfer function constituted by a register and the like, and in the escalator control system according to the present invention,
The PLL calculation is performed so that the deviation “Δθ” obtained by the equation (14) becomes zero, the internal phase angle “θ ₀ ” follows the external phase angle “θ”, and the internal phase angle “θ ₀ ” Change of “Δ
When θ ₀ ″ is in a specific direction, for example, when the escalator is moving upward, as shown in FIG.
_When " ₀ " is in the increasing direction, it is judged as "normal phase" and the operation of the escalator is continued, and when it is in the decreasing direction as shown in Fig. 8 (b), "negative phase". Then, the operation of the escalator is immediately stopped.

<< First Embodiment >> FIG. 1 is a block diagram showing a first embodiment of an escalator control system according to the present invention.

Escalator control system 1 shown in this figure
a takes in the drive voltage supplied via the three-phase electric wire 2, and according to the driving direction input to the control terminal,
An up / down drive device 3 for generating a positive-phase three-phase drive voltage or a reverse-phase three-phase drive voltage to drive a motor 4 of an escalator to be operated, and inside a control panel 6 as shown in FIG. Placed near the power breaker 7 placed in
Each drive current (U-phase current, W-phase current) flowing through the U-phase electric wire 2u and the W-phase electric wire 2w constituting the phase electric wire 2 is converted into current / voltage, and the U-phase current value signal and the W-phase current value signal are converted. Is provided with two current sensors 8a and 8b. Also,
The U-phase current value signal and the W-phase current value signal output from each of the current sensors 8a and 8b are respectively A / D converted to generate a U-phase current waveform "Iu" and a W-phase current waveform "Iw". /
Whether the escalator is operated in reverse phase based on the U-phase current waveform “Iu” and the W-phase current waveform “Iw” which are composed of the D converter device 9 and a microcomputer and are output from the A / D converter device 9. And a reverse-phase detection device 10 that immediately stops the escalator when operating in reverse phase.

Then, the up / down drive unit 3 drives the motor 4 to drive the escalator,
The U-phase electric wire 2u, by each current sensor 8a, 8b,
The U-phase current and the W-phase current flowing through the W-phase electric wire 2w are respectively current / voltage converted to generate a U-phase current value signal and a W-phase current value signal, which are supplied to the A / D converter device 9, From this A / D converter device 9, the U-phase current waveform "I
When u ”and the W-phase current waveform“ Iw ”are being output, the internal phase angle“ θ ₀ ”obtained by the previous PLL calculation processing is detected by the anti-phase detector 10 and the A / D converter 9 The current U-phase current waveform “Iu”, W being output
Based on the phase current waveform “Iw”, the equation (12), (1
The deviation "Δ" is calculated by performing the calculation shown in the equations 3) and (14).
θ ”is calculated.

Thereafter, the anti-phase detector 10 performs the PLL calculation shown in the equation (15) on the basis of this deviation "Δθ" to obtain the internal phase angle "θ ₀ ", and then the internal phase angle "θ ₀ ". Differentiating “θ ₀ ”, the change amount “Δθ ₀ ” is in a specific direction, for example, when the escalator is operating upward, when the change amount “Δθ ₀ ” is increasing,
When the escalator is determined to be "in-phase" and the escalator operation continues, and when the escalator is decreasing, it is determined to be "reverse-phase" and the escalator operation is immediately stopped.

As described above, in the first embodiment, 2
U-phase electric wire 2 by two current sensors 8a, 8b
u and W phase currents flowing through the W and W phase electric wires 2w,
Current / voltage conversion is performed to generate a U-phase current value signal and a W-phase current value signal, and based on these U-phase current value signal and W-phase current value signal, the negative-phase detection device 10 is provided with the equation (12),
After calculating the deviation “Δθ” by performing the calculations represented by the formulas (13) and (14), the PLL calculation shown by the formula (15) is performed to calculate the internal phase angle “θ ₀ ”. , Check whether the direction of change of the amount of change “Δθ ₀ ” with respect to this internal phase angle “θ ₀ ” matches the direction of operation of the escalator, and determine whether the escalator is operating in reverse phase. ing.

Therefore, while saving space in the control panel 6, it is possible to accurately detect whether or not the motor 4 is in the reverse phase even when the load of the motor 4 used in the escalator is light. You can

<< Second Embodiment >> FIG. 3 is a block diagram showing a second embodiment of the escalator control system according to the present invention. In this figure, the same parts as those in FIG. 1 are designated by the same reference numerals.

Escalator control system 1 shown in this figure
b is different from the escalator control system 1a shown in FIG. 1 when the up / down driving device 3 drives the motor 4 to move up or down.
An answer-back signal “UX”, an answer-back signal “DX” or the like output from the down drive device 3 is input to the negative phase detection device 10, and based on the U-phase current value signal and the W-phase current value signal, the (12) ) Expression, (13) Expression, (14)
Equation, the deviation amount “Δθ” with respect to the internal phase angle “θ ₀ ” obtained by performing the deviation calculation and the PLL calculation shown in the formula (15).
_{Based on} the change direction of ₀ "and the content of the answerback signal" UX "or the answerback signal" DX ", whether or not the escalator is operated in the opposite phase, the current sensors 8a and 8b operate normally. It is to determine whether or not there is.

For example, when either the answerback signal “UX” or the answerback signal “DX” is turned on and the change amount “Δθ ₀ ” changes in a specific direction, for example, when the escalator is operating upward. When the amount “Δθ ₀ ” is increasing, it is judged as “normal phase” and the escalator operation is continued. When it is decreasing, it is judged as “reverse phase” and escalator Immediately stop driving.

Further, when either the answerback signal “UX” or the answerback signal “DX” is in the ON state, even though the variation “Δθ ₀ ” is zero, each current sensor 8a. , 8b is determined to be out of order, and the operation of the escalator is immediately stopped.

Thus, in the second embodiment, 2
U-phase electric wire 2 by two current sensors 8a, 8b
u and W phase currents flowing through the W and W phase electric wires 2w,
Current / voltage conversion is performed to generate a U-phase current value signal and a W-phase current value signal, and based on these U-phase current value signal and W-phase current value signal, the negative-phase detection device 10 is provided with the equation (12),
After calculating the deviation “Δθ” by performing the calculations represented by the formulas (13) and (14), the PLL calculation shown by the formula (15) is performed to calculate the internal phase angle “θ ₀ ”. , Check whether the changing direction of the change amount “Δθ ₀ ” with respect to the internal phase angle “θ ₀ ” is consistent with the operating direction of the escalator, and determine whether the escalator is operating in the opposite phase, This determination result and the answerback signal “U” output from the up / down drive unit 3
It is determined whether or not X "and the on / off state of the answerback signal" DX "correspond.

For this reason, the space in the control panel 6 is saved and the presence or absence of an abnormality in the current sensors 8a, 8b is checked without adding any special parts.
Even when the load of the motor 4 used in the escalator is light, it is possible to accurately detect whether or not the motor 4 is in the reverse phase state.

<< Third Embodiment >> FIG. 4 is a block diagram showing a third embodiment of the escalator control system according to the present invention. In this figure, the same parts as those in FIG. 1 are designated by the same reference numerals.

Escalator control system 1 shown in this figure
c differs from the escalator control system 1a shown in FIG. 1 in that when the motor 4 is rotating, a pulse generator 11 that generates a pulse signal is provided, and the output of the pulse generator 11 is input to the anti-phase detector 10. Based on the U-phase current value signal and the W-phase current value signal, the equation (12), (1
Formula 3), Formula (14), Deviation calculation shown in Formula (15) above,
Whether or not the escalator is operating in the opposite phase, based on the changing direction of the change amount “Δθ ₀ ” with respect to the internal phase angle “θ ₀ ” obtained by performing the PLL calculation and the presence or absence of the pulse signal, each current sensor 8a. , 8b is determined to be operating normally.

For example, when the pulse signal is output from the pulse generator 11 at a constant interval, the change amount “Δθ ₀ ” in a specific direction, for example, when the escalator is operating upward, the change amount “Δθ ₀ ”. Is increasing, it is judged as "normal phase" and the escalator operation is continued. When it is decreasing, it is judged as "reverse phase" and the escalator operation is stopped immediately. .

Further, the change amount "Δθ ₀ " is equal to or more than a predetermined time,
When the pulse signal is output from the pulse generator 11 even though it is zero, it is determined that the current is abnormal or one of the current sensors 8a and 8b is defective, and the operation of the escalator is immediately stopped. .

Thus, in the third embodiment, 2
U-phase electric wire 2 by two current sensors 8a, 8b
u and W phase currents flowing through the W and W phase electric wires 2w,
Current / voltage conversion is performed to generate a U-phase current value signal and a W-phase current value signal, and based on these U-phase current value signal and W-phase current value signal, the negative-phase detection device 10 is provided with the equation (12),
After calculating the deviation “Δθ” by performing the calculations represented by the formulas (13) and (14), the PLL calculation represented by the formula (15) is performed to calculate the internal phase angle “θ ₀ ”. It is checked whether the changing direction of the change amount “Δθ ₀ ” with respect to the internal phase angle “θ ₀ ” is consistent with the operating direction of the escalator to determine whether the escalator is operating in the opposite phase and The determination result and the output of the pulse generator 11 correspond to each other.

For this reason, the space inside the control panel 6 is saved, and inexpensive components such as the pulse generator 11 are used to check the presence or absence of an abnormality in the current sensors 8a, 8b while being used in the escalator. Even when the load on the motor 4 is light, it is possible to accurately detect whether the motor 4 is in the reverse phase state.

<< Fourth Embodiment >> FIG. 5 is a block diagram showing a fourth embodiment of the escalator control system according to the present invention. In this figure, the same parts as those in FIG. 1 are designated by the same reference numerals.

Escalator control system 1 shown in this figure
The difference of d from the escalator control system 1a shown in FIG. 1 is that the 7-segment LED 12 is provided in the control panel 6,
(12) based on the phase current value signal and the W phase current value signal
The internal phase angle “θ” obtained by performing the deviation calculation and the PLL calculation shown in the equations (13), (14), and (15) above.
Based on the direction of change of [Delta] [theta] _{0 ""} variation for _"0, to determine whether the escalator is operating in opposite phase,
Based on this determination result, when the escalator is immediately stopped, the reason for the abnormal stop (abnormal cause) is displayed on the 7-segment LED 12.

As described above, in the fourth embodiment, 2
U-phase electric wire 2 by two current sensors 8a, 8b
u and W phase currents flowing through the W and W phase electric wires 2w,
Current / voltage conversion is performed to generate a U-phase current value signal and a W-phase current value signal, and based on these U-phase current value signal and W-phase current value signal, the negative-phase detection device 10 is provided with the equation (12),
After calculating the deviation “Δθ” by performing the calculations represented by the formulas (13) and (14), the PLL calculation shown by the formula (15) is performed to calculate the internal phase angle “θ ₀ ”. , Check whether the changing direction of the change amount “Δθ ₀ ” with respect to the internal phase angle “θ ₀ ” is consistent with the operating direction of the escalator, and determine whether the escalator is operating in the opposite phase, When the escalator is judged to be operating in reverse phase and the escalator is stopped immediately,
The reason (abnormal cause) for the abnormal stop is displayed on the 7-segment LED 12.

Therefore, while saving space in the control panel 6, it is possible to accurately detect whether or not the motor 4 is in the reverse phase even when the load of the motor 4 used in the escalator is light. When the escalator is stopped, the cause of the stop can be recognized simply by opening the control panel 6 and glancing at the inside.

<Fifth Embodiment> FIG. 6 is a block diagram showing a fifth embodiment of the escalator control system according to the present invention. In this figure, the same parts as those in FIG. 1 are designated by the same reference numerals.

Escalator control system 1 shown in this figure
1 differs from the escalator control system 1a shown in FIG. 1 in that the control panel 6 is provided with a notification device 13, and based on the U-phase current value signal and the W-phase current value signal, the equation (12), (1
Formula 3), Formula (14), Deviation calculation shown in Formula (15) above,
It is determined whether or not the escalator is operating in reverse phase based on the direction of change in the amount of change "Δθ ₀ " with respect to the internal phase angle "θ ₀ " obtained by performing the PLL calculation, and the escalator is determined based on this determination result. When stopped immediately, the alarm device 13 displays an error, or an alarm sound or voice,
This is to notify the reason (abnormal cause) of the abnormal stop.

Thus, in the fifth embodiment, 2
U-phase electric wire 2 by two current sensors 8a, 8b
u and W phase currents flowing through the W and W phase electric wires 2w,
Current / voltage conversion is performed to generate a U-phase current value signal and a W-phase current value signal, and based on these U-phase current value signal and W-phase current value signal, the negative-phase detection device 10 is provided with the equation (12),
After calculating the deviation “Δθ” by performing the calculations represented by the formulas (13) and (14), the PLL calculation shown by the formula (15) is performed to calculate the internal phase angle “θ ₀ ”. , Check whether the changing direction of the change amount “Δθ ₀ ” with respect to the internal phase angle “θ ₀ ” is consistent with the operating direction of the escalator, and determine whether the escalator is operating in the opposite phase, When the escalator is judged to be operating in reverse phase and the escalator is stopped immediately,
The reason (abnormal cause) of the abnormal stop is notified by the alarm device 13, an alarm sound, or a voice.

Therefore, while saving space in the control panel 6, it is possible to accurately detect whether or not the motor 4 is in the reverse phase even when the load of the motor 4 used in the escalator is light. Moreover, when the escalator is stopped, the cause of the stop can be notified by a display, a notification sound, a voice, or the like.

[0058]

As described above, according to the present invention, it is possible to reduce the space in the control panel and to check whether the motor is in the reverse phase even when the load of the motor used in the escalator is light. It is possible to detect accurately.

Even when the escalator stops,
The cause of the stop can be recognized simply by opening the control panel and looking inside. Further, even when the escalator is stopped, the cause of the stop can be notified by display, notification sound, voice, or the like.

[Brief description of drawings]

FIG. 1 is a first escalator control system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 2 is a front view showing an example of a control panel in which the current sensors shown in FIG. 1 are housed.

FIG. 3 is a second escalator control system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 4 is a third escalator control system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 5 is a fourth escalator control system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 6 is a fifth part of the escalator control system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 7 is a block diagram of PLL control for explaining the basic principle of the present invention.

FIG. 8 is a waveform diagram showing an example of basic judgment of the escalator control system according to the present invention.

FIG. 9 is a front view showing an example of a control panel used in a conventionally known escalator control system.

[Explanation of symbols]

1a-1d: Escalator control system 2: 3-phase electric wire 2u: U-phase electric wire 2v: V-phase electric wire 2w: W-phase electric wire 3: Up / down drive device 4: Motor 6: Control panel 7: Power breaker 8a, 8b: current sensor 9: A / D converter device 10: Reversed phase detector 11: Pulse generator 12: 7 segment LED (display device) 13: Notification device

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3F321 AA01 CA00 DD01 EA09 EA12                       EB08 EC13                 5H576 AA07 BB03 CC05 DD02 DD05                       EE01 EE10 GG06 JJ03 JJ16                       JJ24 JJ28 KK04 LL07 LL22                       LL37 LL57 MM08 MM10

Claims (5)

[Claims] 1. A current sensor for detecting a plurality of phase current waveforms flowing in a motor for driving an escalator, a rotation direction of a current vector is calculated based on a detection result of the current sensor, and a current obtained by this calculation processing is calculated. An escalator control system comprising: a reverse-phase detection device that determines whether or not the escalator is in reverse-phase operation based on the consistency between the rotation direction of the vector and the operating direction of the escalator. 2. The escalator control system according to claim 1, wherein the reverse phase detection device includes a content of an answerback signal output from an up / down drive device that drives the motor, and a detection result of the current sensor. The escalator control system is characterized in that whether or not the operation contents of the escalator obtained on the basis of the above are matched and whether or not there is an abnormality is determined based on the check result. 3. The escalator control system according to claim 1, wherein the reverse phase detection device is based on an output content of a pulse generator that detects rotation of the motor and a detection result of the current sensor. The escalator control system is characterized by checking whether or not the obtained operation contents of the escalator correspond to each other, and determining whether or not there is an abnormality based on the check result. 4. The escalator control system according to any one of claims 1 to 3, wherein the reverse phase detection device is provided in a control panel when it is determined that the escalator is operating in reverse phase. An escalator control system characterized by displaying the details of abnormalities on the device. 5. The escalator control system according to any one of claims 1 to 4, wherein when the negative phase detection device determines that the escalator is operating in reverse phase, a notification is provided at a predetermined location. An escalator control system characterized in that the device informs of the abnormality.