JP7456541B1 - Elevator car control device - Google Patents

Abstract

The present invention provides an elevator car control device that can accurately estimate the temperature of an element. [Solution] An elevator car control device according to the present disclosure includes first time vs. temperature rise data indicating the relationship between the time when a predetermined operation is continued after power is turned on and the temperature rise of a target element, and a power supply. Second time vs. temperature rise data showing the relationship between the time when the rest mode is continued after turning on and the temperature rise of the target element, and the time and the target element when the rest mode is continued after the prescribed operation is continued. a data storage unit that stores first time vs. temperature drop data showing a relationship with a temperature drop of a temperature estimating unit that estimates a temperature increase value by connecting the rise data and the first time-temperature decrease data with reference to temperature; and an ambient temperature measured by the temperature measurement unit that is added to the estimated temperature rise value. and a control unit that calculates the added value as the temperature of the target element. [Selection diagram] Figure 1

Description

The present disclosure relates to an elevator car control device.

As described in Japanese Patent Application Laid-open No. 2010-038671, the conventional method for predicting the remaining life of an electrolytic capacitor is to install a temperature sensor near the electrolytic capacitor that has the shortest life in the product, and calculate the remaining life of the electrolytic capacitor at each predetermined sampling period. A configuration has been proposed that predicts and calculates the remaining life of a product using nearby temperatures and temperature correction.

JP 2010-038671 A

In conventional calculations for predicting the remaining life of electrolytic capacitors, it is necessary to identify the electrolytic capacitor with the shortest lifespan, but in elevator car control equipment, there are multiple heat sources such as power supply circuits, and the life expectancy varies depending on the operating mode, option specifications, etc. However, each circuit has a different amount of heat, making it difficult to identify the element with the shortest lifespan.

The present disclosure has been made to solve the problems described above. An object of the present disclosure is to provide an elevator car control device that can accurately estimate the temperature of an element.

An elevator car control device according to the present disclosure is an elevator car control device that is equipped with a pause mode that stops lights and fans in the car with the door of the car closed when the elevator is not used for a predetermined period of time. Then, first time vs. temperature rise data showing the relationship between the time when the prescribed operation is continued and the temperature rise of the target element, and the time and temperature rise of the target element when the hibernation mode is continued after the power is turned on. second time vs. temperature rise data showing the relationship between the two; and first time vs. temperature drop data showing the relationship between the time when the rest mode is continued after the predetermined operation is continued and the temperature fall of the target element. , a first temperature rise curve shown by the first time vs. temperature rise data stored in the data storage part, and a second temperature rise curve shown by the second time vs. temperature rise data. A first temperature increase curve, a second temperature increase curve, and a first temperature corresponding to the operation and rest times are determined using the first temperature decrease curve indicated by the first time versus temperature decrease data . a temperature estimating section that estimates a curve of a temperature rise value by connecting the descending curves so that the temperature rise values of the connection points are equal , a temperature measurement section that measures the ambient temperature of the device, and a temperature estimation section. The control unit calculates a value obtained by adding the ambient temperature measured by the temperature measurement unit to the estimated temperature rise value as the temperature of the target element.

According to the present disclosure, it is possible to provide an elevator car control device that can accurately estimate the temperature of an element.

1 is a diagram showing an elevator car control device according to Embodiment 1. FIG. 1 is a graph of a thermal model equation showing a temperature rise during a normal operation mode. It is a graph of a thermal model formula showing a temperature rise in a pause operation mode. It is a graph of a thermal model formula showing a temperature drop in a pause operation mode. 5 is a diagram showing an example of estimating a temperature rise value in the first embodiment. FIG. It is a graph of a thermal model formula showing a temperature drop when the main power is OFF. 7 is a diagram illustrating an example of estimating a temperature rise value in Embodiment 2. FIG. 1 is a diagram illustrating an example of a configuration for realizing the functions of an arithmetic device in Embodiment 1. FIG.

Embodiments will be described below with reference to the drawings. Common or corresponding elements in each figure are denoted by the same reference numerals, and description thereof will be simplified or omitted. The configurations shown in the embodiments shown below are examples of technical ideas related to the present disclosure, and can be combined with other known technologies, or can be combined with multiple technical ideas described in the present disclosure. It is also possible to combine ideas. Further, it is also possible to omit or change a part of the configuration without departing from the gist of the present disclosure.

Embodiment 1.
FIG. 1 is a diagram showing an elevator car control device according to a first embodiment. As shown in FIG. 1, the elevator car control device according to the first embodiment includes an inverter element 1, a door motor 2 connected to the inverter element 1, a first electrolytic capacitor 3, a second electrolytic capacitor 4, A third electrolytic capacitor 5, a calculation device 6 for estimating the temperature of each element, a remote device 7, a first control power source 8 for controlling the door, a load α9 connected to the first control power source 8, and a door. A second control power source 10 for controlling devices other than the second control power source 10, a load β11 connected to the second control power source 10, a third control power source 12 generated from a battery, a power outage light 14, and a power outage light 14 in the event of a power outage. It is equipped with a power outage light control circuit 13 for turning on the light, and a storage device 15 for storing the temperature of each element. The storage device 15 is supplied with power from the third control power source 12 .

Each of the inverter element 1, the first electrolytic capacitor 3, the second electrolytic capacitor 4, and the third electrolytic capacitor 5 in this embodiment is an example of a target element.

In the elevator car control device configured as described above, the temperature of each target element fluctuates in accordance with a thermal model equation with respect to each saturation temperature point under an individual time constant for each operation mode. The arithmetic device 6 has a data storage unit 16 that stores the following thermal model equation.

FIG. 2 is a graph of a thermal model equation showing the temperature rise in the normal operation mode. This graph is expressed as T(t)=A ₁ ×(1−e^(−t/τ ₁ )). Note that A ₁ corresponds to the saturation temperature point in the normal operation mode, and τ ₁ corresponds to the time from the temperature increase value 0 to the saturation temperature point A ₁ in the normal operation mode. FIG. 2 corresponds to first time-temperature rise data showing the relationship between the time when a predetermined operation is continued after the power is turned on and the temperature rise of the target element.

FIG. 3 is a graph of a thermal model equation showing the temperature rise during the idle operation mode. This graph is expressed as T(t)=A ₂ ×(1−e^(−t/τ ₂ )). Note that A ₂ corresponds to the saturation temperature point in the idle operation mode, and τ ₂ corresponds to the time from the temperature increase value 0 to the saturation temperature point A ₂ in the idle operation mode. FIG. 3 corresponds to second time-temperature rise data showing the relationship between the time when the rest mode is continued after the power is turned on and the temperature rise of the target element.

FIG. 4 is a graph of a thermal model equation showing a temperature drop during the idle operation mode. This graph is expressed as T(t)=A ₁ ×e^(−t/τ ₃ )+A ₂ . Note that τ ₃ corresponds to the time from the temperature increase value A ₁ to the saturation temperature point A ₂ in the idle operation mode. FIG. 4 corresponds to first time-temperature drop data showing the relationship between the time when the rest mode is continued after a predetermined operation is continued and the temperature drop of the target element.

The arithmetic device 6 further includes a temperature estimator 17. The temperature estimating unit 17 calculates the first time vs. temperature rise data, the second time vs. temperature rise data, and the first time vs. temperature decrease data stored in the data storage unit 16 according to the time of normal operation and rest mode. The temperature increase value is estimated by concatenating the data based on the temperature. FIG. 5 is a diagram showing an example of estimating a temperature rise value in the first embodiment. In FIG. 5, A, C, E, G, and I correspond to first time-temperature increase data, which is a temperature increase curve in the normal operation mode. B in FIG. 5 corresponds to second time-versus-temperature increase data, which is a temperature increase curve in the idle operation mode. D, F, and H in FIG. 5 correspond to first time-temperature drop data, which is a temperature drop curve in the idle operation mode.

Here, when the operation mode is switched, the temperature estimating unit 17 first calculates the time t from the thermal model equation based on the current temperature rise value T(n), and then calculates the temperature value T(n+1) at the next point in time. Calculate by applying it to the thermal model equation.

Arithmetic device 6 further includes a control section 18 . The elevator car control device of this embodiment includes a temperature measuring section 19 that measures the ambient temperature of the device. The temperature measurement unit 19 measures, for example, the ambient temperature of the target element. The control unit 18 calculates a value obtained by adding the ambient temperature measured by the temperature measurement unit 19 to the temperature rise value estimated by the temperature estimation unit 17 as the temperature of the target element. As a result, in this embodiment, it is possible to estimate the temperature of the target element with high accuracy. Therefore, it becomes possible to accurately predict the thermal failure of the element or the life of the element. As a result, it is possible to reliably prevent the elevator from suddenly failing and the elevator from stopping and the user being trapped in the car.

The control unit 18 may calculate an average temperature: T _ave that is an average value of the calculated temperatures of the target element. For example, when the target element is an electrolytic capacitor, the control unit 18 calculates the lifespan of the electrolytic capacitor using the Arrhenius equation, which is a general lifespan calculation formula.
L _i (m)=L ₀ ×2^(T ₀ -T _ave /10)
It may be calculated by This allows the remaining life of the electrolytic capacitor to be
L _REST = L _i (m) - (Number of operating days)
It can be calculated by At this time, when the remaining life L _REST becomes shorter than the maintenance inspection cycle: N months, the remote device 7 issues information to notify the maintenance company of the life. This makes it possible to notify the maintenance company of the appropriate time to replace the equipment.

According to this embodiment, since the temperature and operation time of the element can be accurately grasped, it is possible to predict the remaining life with high accuracy.

The control unit 18 may stop the car at the nearest floor and shift to the rest mode when the calculated temperature of the target element exceeds the element protection temperature T _MAX , which is a reference value. Thereafter, the control unit 18 may cool the target element until the temperature of the target element reaches a preset element safety temperature T _SAF . Thereby, the life of the target element can be extended, and failure of the target element can be reliably suppressed.

Embodiment 2.
Next, a second embodiment will be described with reference to Fig. 6 and Fig. 7, focusing on the differences from the first embodiment and simplifying or omitting the description of the common parts. Also, the same reference numerals are used to denote the common parts or parts corresponding to the above-mentioned first embodiment.

In the first embodiment described above, the estimated temperature of each element in the energized state is calculated, but when the main power is turned off due to a power outage, etc., the temperature during that period decreases, so the Accurate temperature estimation cannot be made when the system returns to normal operation.

Therefore, in the present embodiment, when the main power is turned off, the estimated temperature at that time is stored in the storage device 15, and the existing power outage light control circuit 13 that is supplied with power from the battery is used to control the main power OFF period. When the main power is restored, the temperature is corrected and restored according to the thermal model equation of T(t)=A ₁ ×e^(-t/τ ₄ ), which indicates the temperature drop when the main power is turned off. FIG. 6 is a graph of a thermal model formula showing a temperature drop when the main power source is turned off. Note that τ ₄ corresponds to the time from the temperature increase value A ₁ to the temperature increase value 0 in the main power OFF mode. FIG. 6 corresponds to second time-temperature drop data showing the relationship between the time when the main power source is OFF and the temperature drop of the target element after the predetermined operation is continued. In this embodiment, the data storage unit 16 further stores second time-temperature drop data shown in FIG. 6 .

FIG. 7 is a diagram showing an example of estimating a temperature rise value in the second embodiment. In FIG. 7, A to I are the same as in FIG. 5. J in FIG. 7 corresponds to second time-temperature drop data, which is a temperature drop curve when the main power source is OFF. As described above, in this embodiment, when the main power is turned off, the existing power outage light control circuit 13 is used to measure the main power OFF period, and the temperature estimator 17 is configured to measure the main power OFF period when the main power is turned off. Sometimes, the temperature of the target element can be corrected using the measured main power OFF period and the second time versus temperature drop data. This makes it possible to accurately estimate the temperature of the target element even when the main power is turned off.

FIG. 8 is a diagram showing an example of a configuration for realizing the functions of the arithmetic device 6 in the first embodiment. Each function of the arithmetic device 6 is realized by, for example, a processing circuit. The processing circuitry may be dedicated hardware 600. The processing circuit may include a processor 601 and a memory 602. Part of the processing circuitry may be formed as dedicated hardware 600 and may further include a processor 601 and a memory 602 . In the example shown in FIG. 8, part of the processing circuitry is formed as dedicated hardware 600. In the example shown in FIG. 8, the processing circuit further includes a processor 601 and a memory 602 in addition to the dedicated hardware 600.

The processing circuitry, a part of which is at least one dedicated hardware 600, may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. .

When the processing circuit includes at least one processor 601 and at least one memory 602, the functions of each part of the arithmetic device 6 are realized by software, firmware, or a combination of software and firmware.

Software and firmware are written as programs and stored in memory 602. The program may be recorded on a computer-readable recording medium. The processor 601 implements the functions of each section by reading and executing programs stored in the memory 602. The processor 601 is also referred to as a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. Examples of the memory 602 include nonvolatile or volatile semiconductor memories such as RAM, ROM, flash memory, EPROM, and EEPROM, or magnetic disks, flexible disks, optical disks, compact disks, minidisks, and DVDs.

In this way, the processing circuit can implement the functions of the arithmetic device 6 using hardware, software, firmware, or a combination thereof. Note that each function of the arithmetic device 6 may be realized by a plurality of devices working together, or may be realized by a single device. Furthermore, at least a portion of each function of the computing device 6 may be implemented in a server or the like on an external network.

Note that among the features of the plurality of embodiments described above, two or more features that can be combined may be combined and implemented.

Hereinafter, various aspects of the present disclosure will be collectively described as supplementary notes.

(Additional note 1)
In an elevator car control device equipped with a pause mode that stops lights and fans in the car with the car door closed when the elevator is not used for a predetermined period of time,
first time versus temperature rise data showing a relationship between the time when a predetermined operation is continued after the power is turned on and the temperature rise of the target element;
second time versus temperature rise data showing a relationship between the time when the rest mode is continued after the power is turned on and the temperature rise of the target element;
first time vs. temperature drop data showing a relationship between the time when the rest mode is continued and the temperature drop of the target element after continuing the predetermined operation;
a data storage unit that stores
The first time-versus-temperature rise data, the second time-versus-temperature-rise data and the first time-versus-temperature fall data stored in the data storage unit are calculated based on the temperature according to the operation and rest times. a temperature estimator that estimates a temperature increase value by connecting the
a temperature measurement unit that measures the ambient temperature of the device;
a control unit that calculates a value obtained by adding the ambient temperature measured by the temperature measurement unit to the temperature rise value estimated by the temperature estimation unit as the temperature of the target element;
Elevator car control device with
(Additional note 2)
The elevator car control device according to Supplementary note 1, wherein the control unit shifts to the rest mode when the temperature of the target element exceeds a reference value.
(Appendix 3)
The data storage unit further stores second time-temperature drop data indicating a relationship between the time when the main power is OFF and the temperature drop of the target element after continuing a predetermined operation,
When the main power is turned off, measuring the main power OFF period by using an existing power outage control circuit,
The temperature estimating unit corrects the temperature of the target element using the main power OFF period and the second time vs. temperature drop data when the main power is restored. Car control device.
(Additional note 4)
The elevator car control device according to any one of Supplementary Notes 1 to 3, wherein the control unit predicts the remaining life of the target element based on the calculated temperature and operating time of the target element.

1 Inverter element, 2 Door motor, 3 First electrolytic capacitor, 4 Second electrolytic capacitor, 5 Third electrolytic capacitor, 6 Arithmetic device, 7 Remote device, 8 First control power source, 10 Second control power source, 12 Third control power source , 13 power outage light control circuit, 14 power outage light, 15 storage device, 16 data storage unit, 17 temperature estimation unit, 18 control unit, 19 temperature measurement unit, 600 dedicated hardware, 601 processor, 602 memory

Claims (4)

In an elevator car control device equipped with a pause mode that stops lights and fans in the car with the car door closed if the elevator is not used for a predetermined period of time,
first time vs. temperature rise data showing a relationship between the time when a predetermined operation is continued after the power is turned on and the temperature rise of the target element;
second time versus temperature rise data showing a relationship between the time when the rest mode is continued after the power is turned on and the temperature rise of the target element;
first time vs. temperature drop data showing a relationship between the time when the rest mode is continued and the temperature drop of the target element after continuing the predetermined operation;
a data storage unit that stores
a first temperature rise curve indicated by the first time versus temperature rise data stored in the data storage unit; a second temperature rise curve indicated by the second time versus temperature rise data; and a first temperature rise curve indicated by the second time versus temperature rise data. A first temperature increase curve, the second temperature increase curve, and the first temperature decrease curve corresponding to the operation and rest times using the first temperature decrease curve indicated by the time vs. temperature decrease data. and a temperature estimating unit that estimates a temperature rise value curve by connecting the above in such a manner that the temperature rise values at the connection points are equal;
a temperature measurement unit that measures the ambient temperature of the device;
a control unit that calculates a value obtained by adding the ambient temperature measured by the temperature measurement unit to the temperature rise value estimated by the temperature estimation unit as the temperature of the target element;
Elevator car control device with The elevator car control device according to claim 1, wherein the control unit transitions to a rest mode when the temperature of the target element exceeds a reference value. The data storage unit further stores second time vs. temperature drop data indicating a relationship between the time when the main power is OFF and the temperature drop of the target element after continuing the predetermined operation,
When the main power is turned off, measuring the main power OFF period by using an existing power outage control circuit,
The temperature estimating unit is configured to calculate a second temperature drop curve indicated by the second time-temperature drop data during the main power OFF period when the main power source returns from the OFF state of the main power source to a temperature at a connection point . Claim 1 or 2, wherein the temperature of the target element when the main power is restored is corrected by connecting to the curve of the temperature rise before the main power OFF period so that the rise values are equal. 2. The elevator car control device according to 2. The elevator car control device according to claim 1 or 2, wherein the control unit predicts the remaining life of the target element based on the calculated temperature and operating time of the target element.

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