Elevator car control device

Abstract

To provide an elevator car control device capable of accurately estimating a temperature of an element.SOLUTION: An elevator car control device of the present disclosure comprises: a data storage part which stores first time-temperature rise data indicating a relation between a time when a prescribed operation is continued and the temperature rise of a target element after the power-up, second time-temperature rise data indicating a relation between a time when a resting mode is continued and the temperature rise of the target element after the power-up, and first time-temperature drop data indicating a relation between the time when the resting mode is continued and the temperature drop of the target element after the prescribed operation is continued; a temperature estimation part which estimates a temperature rising value by connecting the first time-temperature rise data, the second time-temperature rise data, and the first time-temperature drop data depending on the operation time and the resting time, with reference to the temperature; and a control part which calculates a value obtained by adding an ambient temperature measured by a temperature measuring part to the estimated temperature rising value as the temperature of the target element.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an elevator car control device. [Background technology]

[0002] A conventional method for predicting the remaining life of an electrolytic capacitor, as disclosed in JP 2010-038671 A, proposes a configuration in which a temperature sensor is installed near the electrolytic capacitor with the shortest life in a product, and the remaining life of the product is predicted based on the temperature near the electrolytic capacitor for each specified sampling interval and temperature correction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-038671 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional methods for predicting the remaining lifespan of electrolytic capacitors require identifying the electrolytic capacitor with the shortest lifespan. However, elevator car control devices have multiple heat sources such as power circuits, and the amount of heat generated by each circuit varies depending on the operating mode and optional specifications, making it difficult to identify the capacitor with the shortest lifespan.

[0005] The present disclosure has been made to solve the above-mentioned problems. An object of the present disclosure is to provide an elevator car control device that can accurately estimate the temperature of an element. [Means for solving the problem]

[0006] The elevator car control device according to the present disclosure is an elevator car control device equipped with a pause mode in which, if the elevator is not used for a predetermined time, the car doors are closed and the lights and fans inside the car are stopped, the car control device includes: a data storage unit that stores first temperature rise data versus time indicating the relationship between the time when a predetermined operation is continued after power-on and the temperature rise of the target element; second temperature rise data versus time indicating the relationship between the time when the pause mode is continued after power-on and the temperature rise of the target element; and first temperature drop data versus time indicating the relationship between the time when the pause mode is continued after the predetermined operation is continued and the temperature drop of the target element; a temperature estimation unit that estimates a temperature rise value by linking the first temperature rise data versus time, the second temperature rise data versus time, and the first temperature drop data versus time stored in the data storage unit based on temperature according to the operation and pause times; a temperature measurement unit that measures the ambient temperature of the device; and 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. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide an elevator car control device that can accurately estimate the temperature of an element. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an elevator car control device according to a first embodiment. [Diagram 2] 1 is a graph of a thermal model equation showing a temperature rise during a normal operation mode. [Diagram 3] 4 is a graph of a thermal model equation showing a temperature rise during a pause operation mode. [Figure 4] 4 is a graph of a thermal model equation showing a temperature drop during a pause operation mode. [Diagram 5] FIG. 4 is a diagram showing an example of estimating a temperature rise value in the first embodiment. [Figure 6] 1 is a graph of a thermal model equation showing a temperature drop when the main power is turned off. [Figure 7]FIG. 11 is a diagram showing an example of estimating a temperature rise value in the second embodiment. [Figure 8] FIG. 2 is a diagram illustrating an example of a configuration for implementing the functions of a calculation device according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments will be described with reference to the drawings. In each drawing, the same reference numerals are used to denote common or corresponding elements, and the description is simplified or omitted. The configurations shown in the embodiments below are examples of the technical ideas related to the present disclosure, and may be combined with other known technologies, or multiple technical ideas described in the present disclosure may be combined. In addition, it is also possible to omit or modify a part of the configuration without departing from the gist of the present disclosure.

[0010] Embodiment 1 FIG. 1 is a diagram showing an elevator car control device according to the 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 that estimates and calculates the temperature of each element, a remote device 7, a first control power supply 8 for door control, a load α9 connected to the first control power supply 8, a second control power supply 10 for controlling devices other than the door, a load β11 connected to the second control power supply 10, a third control power supply 12 generated from a battery, a power failure light 14, a power failure light control circuit 13 for turning on the power failure light 14 during a power failure, and a storage device 15 that stores the temperature of each element. The storage device 15 is supplied with power from the third control power supply 12.

[0011] In this embodiment, the inverter element 1, the first electrolytic capacitor 3, the second electrolytic capacitor 4, and the third electrolytic capacitor 5 are each an example of a target element.

[0012] In an elevator car control device configured in this way, the temperature of each target element fluctuates according to a thermal model equation for each saturation temperature point with an individual time constant for each operation mode. The calculation device 6 has a data storage unit 16 that stores the following thermal model equation.

[0013] Figure 2 is a graph of a thermal model equation showing the temperature rise in normal operation mode. This graph is expressed as T(t)=A1×(1-e^(-t / τ1)). Note that A1 corresponds to the saturation temperature point in normal operation mode, and τ1 corresponds to the time it takes from a temperature rise value of 0 to the saturation temperature point A1 in normal operation mode. Figure 2 corresponds to the first time-vs-temperature rise data showing the relationship between the time when a specified operation is continued after power-on and the temperature rise of the target element.

[0014] Figure 3 is a graph of a thermal model equation showing the temperature rise during pause operation mode. This graph is expressed as T(t)=A2×(1-e^(-t / τ2)). Note that A2 corresponds to the saturation temperature point during pause operation mode, and τ2 corresponds to the time from the temperature rise value of 0 to the saturation temperature point A2 in pause operation mode. Figure 3 corresponds to the second time vs. temperature rise data showing the relationship between the time when pause mode is continued after power-on and the temperature rise of the target element.

[0015] Figure 4 is a graph of a thermal model equation showing the temperature drop during pause operation mode. This graph is expressed as T(t)=A1×e^(-t / τ3)+A2. Note that τ3 corresponds to the time it takes to reach the saturation temperature point A2 from the temperature rise value A1 in pause operation mode. Figure 4 corresponds to the first time vs. temperature drop data showing the relationship between the time when the pause mode is continued after a specified operation is continued and the temperature drop of the target element.

[0016] The calculation device 6 further includes a temperature estimation unit 17. The temperature estimation unit 17 estimates a temperature rise value by linking the first time vs. temperature rise data, the second time vs. temperature rise data, and the first time vs. temperature drop data stored in the data storage unit 16 based on temperature according to the time of the normal operation and the pause mode. 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 the first time vs. temperature rise data, which is a temperature rise curve in the normal operation mode. B in FIG. 5 corresponds to the second time vs. temperature rise data, which is a temperature rise curve in the pause operation mode. D, F, and H in FIG. 5 correspond to the first time vs. temperature drop data, which is a temperature drop curve in the pause operation mode.

[0017] When the operation mode is switched, the temperature estimation unit 17 first inversely calculates the time t from the current temperature rise value T(n) using the thermal model equation, and then calculates the next temperature value T(n+1) by applying it to the thermal model equation.

[0018] The arithmetic device 6 further includes a control unit 18. The elevator car control device of this embodiment includes a temperature measurement unit 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 the temperature of the target element by adding the ambient temperature measured by the temperature measurement unit 19 to the temperature rise value estimated by the temperature estimation unit 17. This makes it possible to accurately estimate the temperature of the target element in this embodiment. Therefore, it becomes possible to accurately predict thermal failure of the element or the lifespan of the element. As a result, it is possible to reliably prevent the elevator from stopping due to a sudden failure of the element, resulting in users being trapped in the car.

[0019] The control unit 18 calculates an average temperature T ave For example, when the target element is an electrolytic capacitor, the control unit 18 calculates the lifetime of the electrolytic capacitor by the Arrhenius equation, which is a general formula for calculating the lifetime, as follows: L i (m)=L0×2^(T0-T ave / 10) This allows the remaining life of the electrolytic capacitor to be calculated as follows: L REST =L i (m)-(number of working days) In this case, the remaining life L is calculated based on the maintenance inspection period: N months. REST When the life span becomes shorter, information is issued from the remote device 7 to inform the maintenance company of the life span. This makes it possible to inform the maintenance company of the appropriate time to replace the equipment.

[0020] According to this embodiment, the temperature and operating time of the element can be accurately grasped, so that the remaining life can be predicted with high accuracy.

[0021] The control unit 18 determines whether the calculated temperature of the target element is equal to or lower than the reference value of the element protection temperature T MAX If the temperature of the target element exceeds a preset element safe temperature T SAF This can extend the life of the target element, and reliably prevent the target element from breaking down.

[0022] Embodiment 2 Next, a second embodiment will be described with reference to Figures 6 and 7, focusing on the differences from the first embodiment and simplifying or omitting the description of the commonalities. Also, the same reference numerals are used to designate the common or corresponding elements to the elements described above.

[0023] In the above-mentioned embodiment 1, the estimated temperature of each element is calculated while it is in a powered state. However, when the main power supply is turned off due to a power outage or the like, the temperature during that period drops, making it impossible to accurately estimate the temperature when the power supply is restored.

[0024] Therefore, in this embodiment, when the main power supply is turned off, the estimated temperature at that time is stored in the storage device 15, and the existing power failure lamp control circuit 13, which is powered by a battery, counts the period when the main power supply is off, and when the main power supply is restored, the temperature is corrected and restored according to the thermal model formula T(t)=A1×e^(-t / τ4) which shows the temperature drop when the main power supply is off. FIG. 6 is a graph of the thermal model formula showing the temperature drop when the main power supply is off. Note that τ4 corresponds to the time from the temperature rise value A1 to the temperature rise value 0 in the main power supply off mode. FIG. 6 corresponds to the second time vs. temperature drop data showing the relationship between the time when the main power supply is off and the temperature drop of the target element after a predetermined operation is continued. In this embodiment, the data storage unit 16 further stores the second time vs. temperature drop data shown in FIG. 6.

[0025] 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 FIG. 5. J in FIG. 7 corresponds to the second time vs. temperature drop data, which is a temperature drop curve when the main power supply is OFF. As described above, in this embodiment, when the main power supply is OFF, the main power supply OFF period is measured by using the existing power failure light control circuit 13, and when the main power supply is restored, the temperature estimation unit 17 can correct the temperature of the target element using the measured main power supply OFF period and the second time vs. temperature drop data. This makes it possible to accurately estimate the temperature of the target element even when the main power supply is OFF.

[0026] 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 circuit may be dedicated hardware 600. The processing circuit may include a processor 601 and a memory 602. A part of the processing circuit may be formed as the dedicated hardware 600, and the processing circuit may further include the processor 601 and the memory 602. In the example shown in FIG. 8, a part of the processing circuit is formed as the dedicated hardware 600. Also, in the example shown in FIG. 8, the processing circuit further includes the processor 601 and the memory 602 in addition to the dedicated hardware 600.

[0027] The processing circuitry of which at least one portion is dedicated hardware 600 may be, for example, a single circuit, multiple circuits, a programmed processor, parallel programmed processors, an ASIC, an FPGA, or a combination thereof.

[0028] 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.

[0029] The software and firmware are written as a program and stored in the memory 602. The program may be recorded in a computer-readable recording medium. The processor 601 realizes the functions of each unit by reading and executing the program stored in the memory 602. The processor 601 is also called a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. The memory 602 may be, for example, a non-volatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, and an EEPROM, or a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD.

[0030] In this way, the processing circuit can realize the functions of the arithmetic device 6 by hardware, software, firmware, or a combination of these. 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. Also, at least a part of each function of the arithmetic device 6 may be implemented in a server or the like on an external network.

[0031] Among the features of the above-described embodiments, two or more features that can be combined may be combined to implement the present invention.

[0032] Various aspects of the present disclosure are summarized below as appendices.

[0033] (Appendix 1) In an elevator car control device having a pause mode in which, if the elevator is not used for a predetermined period of time, the car doors are closed and the lighting and fans in the car are stopped, A first temperature rise versus time data showing a relationship between a time when a predetermined operation is continued after power-on and a temperature rise of the target element; Second time-vs-temperature rise data showing a relationship between a time when the sleep mode continues after power-on and a temperature rise of the target element; First time-vs-temperature drop data showing a relationship between a time when a sleep mode is continued after a predetermined operation is continued and a temperature drop of the target element; A data storage unit storing the a temperature estimation unit that estimates a temperature rise value by linking the first temperature rise data versus time, the second temperature rise data versus time, and the first temperature drop data versus time stored in the data storage unit based on temperature according to operation and pause times; a temperature measuring unit for measuring an ambient temperature of the device; a control unit that calculates a temperature of the target element by adding the ambient temperature measured by the temperature measurement unit to the temperature rise value estimated by the temperature estimation unit; An elevator car control device comprising: (Appendix 2) 2. The elevator car control device according to claim 1, wherein the control unit transitions to a sleep mode when the temperature of the target element exceeds a reference value. (Appendix 3) The data storage unit further stores second time-vs-temperature drop data indicating a relationship between a time when the main power supply is turned off and a temperature drop of the target element after a predetermined operation is continued, When the main power supply is turned off, the main power supply OFF period is measured by utilizing an existing power failure control circuit, 3. The elevator car control device of claim 1, wherein the temperature estimation unit corrects the temperature of the target element when a main power supply is restored by using the main power supply OFF period and the second time-versus-temperature drop data. (Appendix 4) 4. The elevator car control device according to claim 1, wherein the control unit predicts a remaining life of the target element based on the calculated temperature and operating time of the target element. [Explanation of symbols]

[0034] 1 inverter element, 2 door motor, 3 first electrolytic capacitor, 4 second electrolytic capacitor, 5 third electrolytic capacitor, 6 arithmetic unit, 7 remote device, 8 first control power supply, 10 second control power supply, 12 third control power supply, 13 blackout light control circuit, 14 blackout 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

1. In an elevator car control device having a pause mode in which, if the elevator is not used for a predetermined period of time, the car doors are closed and the lighting and fans in the car are stopped, A first temperature rise versus time data showing a relationship between a time and a temperature rise of the target element when a predetermined operation is continued after power-on; Second time-vs-temperature rise data showing a relationship between a time when the sleep mode continues after power-on and a temperature rise of the target element; First time-vs-temperature drop data showing a relationship between a time when a sleep mode is continued after a predetermined operation is continued and a temperature drop of the target element; A data storage unit storing the a temperature estimation unit that estimates a temperature rise value by linking the first temperature rise data versus time, the second temperature rise data versus time, and the first temperature drop data versus time stored in the data storage unit based on temperature according to operation and pause times; a temperature measuring unit for measuring an ambient temperature of the device; a control unit that calculates a temperature of the target element by adding the ambient temperature measured by the temperature measurement unit to the temperature rise value estimated by the temperature estimation unit; An elevator car control device comprising:

2. The elevator car control device according to claim 1 , wherein the control unit transitions to a pause mode when the temperature of the target element exceeds a reference value.

3. the data storage unit further stores second time-vs-temperature drop data indicating a relationship between a time when a main power source is turned off and a temperature drop of the target element after a predetermined operation is continued, When the main power supply is turned off, the main power supply OFF period is measured by utilizing an existing power failure control circuit, 3. The elevator car control device according to claim 1, wherein the temperature estimation unit corrects the temperature of the target element when the main power is restored, by using the period during which the main power was off and the second time-versus-temperature drop data.

4. 3. The elevator car control device according to claim 1, wherein the control unit predicts a remaining life of the target element based on the calculated temperature and operating time of the target element.

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