Elevator power supply control device and elevator power supply control method

Abstract

The invention provides an elevator power supply control device and an elevator power supply control method. When a power supply in a main power supply circuit connected with the cut-off machine is abnormal, proper automatic stop operation can be performed. The present invention is provided with: a first cut-off machine (111) which is disposed on a control panel (110) and which is connected to a power supply circuit for supplying a main power supply; and a second cut-off machine (101) connected to the power supply circuit at a position different from the control panel (110). The second cut-off machine (101) has an auxiliary contact (101a) that is disconnected in conjunction with the disconnection of the main contact, and an alarm contact (101b) that is connected when the cut-off machine detects an abnormality in the main power supply. Then, when it is detected that the supply of the main power supply is stopped in the state that the alarm contact (101b) is switched on, the power supply from the power failure storage battery (116) is supplied to the elevator main circuit (115), and automatic stop operation of the elevator is performed.

Description

Technical Field

[0001] The invention relates to an elevator power supply control device and an elevator power supply control method. Background Art

[0002] In the case of an elevator with a machine room, the main power operating device is generally installed in the control panel of the machine room. The main power supply to the traction machine can be cut off by manual operation of the main power operating device. However, the main power supply is basically cut off by the main power operating device only when the elevator is inspected and repaired, and it is forbidden to suddenly cut off the main power supply during normal operation. For example, consider the case where the main power supply is temporarily cut off by the main power operating device during the inspection work to confirm whether the brake is working correctly.

[0003] In addition, there is also a case where a main power disconnector (second main power operating device) is installed near the entrance and exit of the machine room separately from the main power operating device. If a main power disconnector is installed near the entrance and exit of the machine room, maintenance personnel can enter the machine room and immediately perform the main power disconnection operation, thereby enabling rapid response in case of emergency.

[0004] However, the main power supply of the elevator may be cut off when a power failure, grounding, short circuit, leakage or other power abnormality occurs. When a power failure or power abnormality occurs during the operation of the elevator, the elevator car can automatically stop and operate to the nearest floor. That is, the elevator is equipped with an emergency battery, and when a power abnormality caused by a power failure occurs, the elevator automatically stops at the nearest floor using the power supplied from the battery. In addition, power abnormalities such as grounding, short circuit, leakage or other power abnormalities are detected by the overcurrent protection function and the leakage protection function.

[0005] On the other hand, the main power supply is cut off by manual operation of the main power supply operating device, for example, when the operator wants to make an emergency stop for some reason during the execution of maintenance work. However, in such a case, the car is stopped immediately and automatic parking is prohibited.

[0006] Patent Document 1 describes an example of an elevator that performs automatic parking operation during a power outage.

[0007] Prior Art Literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Publication No. 2018-167920 Summary of the invention

[0010] -Problems to be solved by the invention-

[0011] Power failure, grounding, short circuit, leakage and other power supply anomalies may occur during normal elevator operation. In such cases, the elevator needs to automatically stop in order to prevent passengers from being trapped. Here, power supply anomalies such as grounding, short circuit, leakage and other power supply anomalies may also occur due to anomalies of the external disconnector (second main power supply operating device) of the control panel. In particular, even the disconnector installed near the entrance and exit of the machine room may cause power supply anomalies.

[0012] However, as described in the background technology column, since automatic parking is prohibited when the main power operating device (disconnector) is manually operated, the automatic parking operation may not be performed when grounding, short circuit, leakage, etc. occur due to an abnormality in the main power circuit connected to the main power operating device.

[0013] In view of this, the present invention aims to provide an elevator power supply control device and an elevator power supply control method which can perform appropriate automatic parking operation when a power supply abnormality occurs in a main power supply circuit connected to a disconnector.

[0014] -Methods for solving problems-

[0015] In order to solve the above-mentioned problems, for example, the structure described in the claims is adopted.

[0016] The present application includes a plurality of solutions to the above-mentioned problems. As an example, the present application is applied to an elevator power supply control device as follows, which comprises: a first disconnector, which is arranged on a control panel and connected to a power supply circuit for supplying a main power supply, and has a main contact for disconnecting the main power supply and an auxiliary contact that is disconnected in conjunction with the disconnection of the main contact; a second disconnector, which is connected to the power supply circuit at a position different from the control panel and has a main contact for disconnecting the main power supply and an auxiliary contact that is disconnected in conjunction with the disconnection of the main contact; an elevator main circuit, which is supplied with a main power supply via the power supply circuit to which the first disconnector and the second disconnector are connected, and obtains a power supply for driving the elevator; a detection circuit, which connects the auxiliary contacts in series; and a control circuit, which stops the elevator main circuit when the detection circuit detects that any one of the auxiliary contacts is disconnected, and when the detection circuit detects that the supply of the main power supply to the elevator main circuit is stopped when the detection circuit detects that the auxiliary contacts are connected, supplies power from a power-off battery to the elevator main circuit to perform an automatic parking operation of the elevator.

[0017] Here, an alarm contact that is turned on when the second circuit breaker detects an abnormality in the main power supply is connected in parallel to the auxiliary contact of the second circuit breaker. When the detection circuit detects that the main power supply is stopped while the alarm contact is turned on, the control circuit supplies power from the power outage battery to the elevator main circuit, thereby performing automatic parking operation of the elevator.

[0018] -Effects of the Invention-

[0019] According to the present invention, when the main power is cut off by the operation of the second cut-off device, the main power is immediately cut off and the automatic parking operation is not performed. On the other hand, when the power supply at the location of the second cut-off device is abnormal, the automatic parking operation based on the connection of the alarm contact is performed, and the rescue of passengers based on the automatic parking operation can be appropriately performed.

[0020] The other problems, structures, and effects than those described above will become clear from the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a block diagram showing an example of arrangement of cutting machines in a machine room according to an embodiment of the present invention.

[0022] Figure 2 This is a circuit diagram showing an example of a power supply device for an elevator according to an embodiment of the present invention.

[0023] Figure 3 This is a flowchart showing an example of control processing by a control circuit according to one embodiment of the present invention.

[0024] -Description of Reference Numerals-

[0025] 10…hoisting passage, 11…car, 12…counterweight, 13…main hoisting rope, 14…traction machine, 21…elevator lobby, 30…machine room, 31…first entrance and exit, 32…second entrance and exit, 101…second disconnector (disconnector provided at entrance and exit), 101a…auxiliary contact, 101b…alarm contact, 102…third disconnector (disconnector provided at entrance and exit), 102a…auxiliary contact, 102b…alarm contact, 103…detection circuit, 104…power supply lead-in wire, 105…disconnector, 110…elevator control panel, 111…first disconnector, 111a…auxiliary contact, 112…disconnection operation unit, 113…noise filter, 114…building power supply contactor, 115…elevator main circuit, 116…power failure battery, 117…battery power supply contactor, 121…control circuit, 122…auxiliary battery. DETAILED DESCRIPTION

[0026] Hereinafter, an elevator power supply control device and an elevator power supply control method according to an embodiment example (hereinafter referred to as “this example”) of the present invention will be described with reference to the drawings.

[0027] [Structure of elevator and machine room]

[0028] Figure 1 A configuration example of an elevator to which the elevator power supply control device of this example is applied is shown.

[0029] The elevator of this example has a car 11 disposed in a hoistway 10. The car 11 and a counterweight 12 are connected via a main rope 13, and the car 11 is raised and lowered by driving a traction machine 14 around which the main rope 13 is wound. The car 11 stops at a lobby 21 on each floor.

[0030] A machine room 30 is provided above the hoistway 10, and a traction machine 14 and an elevator control panel 110 are provided in the machine room 30. The elevator control panel 110 controls the power supply to the traction machine 14, and a cut-off machine 111 is provided in the elevator control panel 110 for a worker to manually cut off the power supply.

[0031] In addition, the machine room 30 is provided with a first entrance 31 and a second entrance 32, and a cut-off machine 101, 102 is provided at an entrance inside the machine room 30 (wall, etc.) near each entrance 31, 32. The cut-off machine 101, 102 provided at each entrance is also a device for the operator entering the machine room 30 to manually perform a cut-off operation. These cut-off machines 111, 101, 102 all have an overcurrent protection function or a leakage protection function, and when a power supply abnormality is detected by the overcurrent protection function or the leakage protection function, each cut-off machine 111, 101, 102 performs a cut-off operation.

[0032] In the following description, the cutting machine 111 of the elevator control panel 110 is described as the first cutting machine, the cutting machine 101 installed at the entrance near the first entrance 31 is described as the second cutting machine, and the cutting machine 102 installed at the entrance near the second entrance 32 is described as the third cutting machine.

[0033] In addition, if Figure 1 As shown, a cutting machine 105 may be provided in a hoistway such as a pit at the bottom of the hoistway 10 .

[0034] [Structure of power supply circuit]

[0035] Figure 2 The circuit structure of an elevator power supply device that supplies elevator driving power to the hoisting machine 14 is shown.

[0036] like Figure 2 As shown, the main power (building power of 200V three-phase AC power) supplied via the power supply lead-in line 104 is supplied to the elevator control panel 110 via the second disconnector 101 and the third disconnector 102. Figure 1 As shown, the second cutting machine 101 and the third cutting machine 102 are inlet and outlet mounted cutting machines which are installed near the first inlet and outlet 31 and near the second inlet and outlet 32 ​​.

[0037] The main power supplied to the elevator control panel 110 is connected to the first disconnector 111. The first disconnector 111 has a disconnection operation unit 112, and is provided with an auxiliary contact 111a that is turned on / off in conjunction with the disconnection of the main power in the disconnection operation unit 112. That is, the auxiliary contact 111a is turned on when the disconnection operation of the main power in the disconnection operation unit 112 is not performed, and is turned off when the disconnection operation of the main power in the disconnection operation unit 112 is performed. The auxiliary contact 111a is connected in series with other auxiliary contacts 101a and 102a described later.

[0038] The main power that has passed through the first disconnector 111 is supplied to the elevator main circuit 115 via the noise filter 113 and the building power supply contactor 114 .

[0039] The elevator main circuit 115 includes an inverter and a converter, and is used to supply power to the hoisting machine 14 ( Figure 1 ) converts the frequency and voltage supplied, and supplies the converted power to the traction machine 14 as the power for driving the elevator.

[0040] In addition, the power from the power outage battery 116 is supplied to the elevator main circuit 115 via the battery power supply contactor 117. The power supply from the power outage battery 116 is performed by the control circuit 121. Then, the elevator main circuit 115 performs frequency and voltage conversion for supplying to the traction machine 14, and the converted power is supplied to the traction machine 14 as the power for elevator driving.

[0041] The elevator driving power supplied from the power failure battery 116 to the hoisting machine 14 via the elevator main circuit 115 is the power for automatic parking operation and is supplied only for a few seconds to stop the elevator at the lobby 21 of the nearest floor.

[0042] The power supply route control circuit 121 between the noise filter 113 and the building power supply contactor 114 monitors and detects whether the main power is supplied as the building power. If the disconnection operation is not performed by each disconnector 111, 101, 102 through the processing described later, if it is detected that the main power is not supplied, the control circuit 121 supplies the power for driving the elevator to the traction machine 14 from the power failure battery 116 via the elevator main circuit 115, and performs automatic parking operation. The details of the judgment processing for performing the automatic parking operation will be described later.

[0043] The control circuit 121 is constituted by, for example, a computer having the following components: a CPU (Central Processing Unit) that instructs the execution of arithmetic processing based on a program; and a memory that performs arithmetic processing under the control of the CPU. In addition, when no external power supply is available, the control circuit 121 operates using power from the auxiliary battery 122.

[0044] Next, the configurations of the second cutting machine 101 and the third cutting machine 102 in which the cutting machines are provided as the entrances and exits will be described.

[0045] The second disconnecting machine 101 and the third disconnecting machine 102 are disconnecting machines for performing a main power disconnection operation, and are provided with auxiliary contacts 101 a and 102 a and alarm contacts 101 b and 102 b , respectively.

[0046] That is, the second disconnector 101 has an auxiliary contact 101a that is disconnected in conjunction with the disconnection of the main power supply, and an alarm contact 101b connected in parallel with the auxiliary contact 101a. The auxiliary contact 101a is disconnected in conjunction with the disconnection of the main power supply in the second disconnector 101, and is always connected when the main power supply in the second disconnector 101 is not disconnected. The alarm contact 101b is a contact that is connected when an abnormality (grounding, short circuit, leakage, etc.) of the main power supply in the second disconnector 101 is detected, and is disconnected when the abnormality of the main power supply is not detected.

[0047] The auxiliary contact 102a and the alarm contact 102b provided in the third disconnector 102 are also controlled to be turned on / off based on the main power supply disconnection operation and the main power supply abnormality detection, similarly to the auxiliary contact 101a and the alarm contact 101b of the second disconnector 101.

[0048] like Figure 2 As shown in FIG. 1 , two auxiliary contacts 101a, 102a and alarm contacts 101b, 102b connected in parallel to the auxiliary contacts 101a, 102a are connected in series with the auxiliary contact 111a of the first cutter 111. A given DC voltage (48V, etc.) is supplied to one end of the series circuit of the auxiliary contacts 101a, 102a, 111a and the alarm contacts 101b, 102b, and a detection circuit 103 of the DC voltage is connected to the other end.

[0049] In addition, a timer for counting the time (approximately several seconds) required for the automatic parking operation is incorporated in the detection circuit 103 .

[0050] The detection status of the DC voltage in the detection circuit 103 is determined by the control circuit 121. For example, when the main power supply is not cut off by each of the cutters 101, 102, and 111, each of the auxiliary contacts 101a, 102a, and 111a is turned on, and the given voltage is detected by the detection circuit 103. At this time, the control circuit 121 determines that the main power supply is not cut off in each of the cutters 101, 102, and 111.

[0051] When the control circuit 121 determines that the auxiliary contacts 101a, 102a, and 111a are connected without disconnection operation when the main power is supplied to the elevator main circuit 115, it determines that there is no power outage and continues the operation of the elevator main circuit 115 as it is.

[0052] Furthermore, when the main power is cut off in any of the cutters (any of the cutters 101, 102, 111), any of the auxiliary contacts 101a, 102a, 111a is disconnected, so that the detection circuit 103 cannot detect the given voltage. Here, when the main power does not supply the main power to the elevator main circuit 115 and the detection circuit 103 does not detect the given voltage, the control circuit 121 performs a main power stop process based on the main power cut operation by any of the cutters (any of the cutters 101, 102, 111). That is, the control circuit 121 determines that the main power is stopped due to something other than a power outage, and stops the elevator main circuit 115 without performing the automatic parking operation.

[0053] However, since the alarm contacts 101b and 102b are connected in parallel to the auxiliary contacts 101a and 102a in the second cutter 101 and the third cutter 102, when the cutter 101 and 102 are cut by the overcurrent or leakage protection function, the corresponding alarm contact 101b or 102b is turned on. Therefore, the detection circuit 103 detects the given voltage.

[0054] When the main power is not supplied to the elevator main circuit 115 and the detection circuit 103 detects a given voltage, the control circuit 121 activates the timer incorporated in the detection circuit 103 and performs the automatic parking operation while the timer is operating.

[0055] That is, when a fault such as grounding, short circuit, or leakage occurs in the main power circuit from the two entrances and exits 31 and 32 to the main power cutoff machine 111 of the elevator control panel 110, the overcurrent protection function or leakage protection function is activated in the second cutoff machine 101 or the third cutoff machine 102 near the entrances and exits 31 and 32. And, by the overcurrent protection function or leakage protection function, the second cutoff machine 101 or the third cutoff machine 102 performs a cutoff operation. At this time, the auxiliary contacts 101a and 102a that are linked to the second cutoff machine 101 and the third cutoff machine 102 are cut off in a linked manner and become disconnected, so that the automatic parking operation cannot be performed.

[0056] Here, in the case of this example, alarm contacts 101b and 102b are connected in parallel to the auxiliary contacts 101a and 102a on the second cutting machine 101 and the third cutting machine 102. The alarm contacts 101b and 102b sound an alarm when the second cutting machine 101 or the third cutting machine 102 performs a cutting action through the overcurrent or leakage protection function.

[0057] For example, when a fault such as grounding, short circuit, or leakage occurs in the main power circuit from the two entrances and exits 31 and 32 to the main power disconnector 111 of the elevator control panel 110, at least one of the second disconnector 101 and the third disconnector 102 near the two entrances and exits 31 and 32 performs a disconnection action through an overcurrent protection function or a leakage protection function.

[0058] At this time, the auxiliary contacts 101a and 102a linked to the operating cut-off machines 101 and 102 are cut off and disconnected, but since it is a cut-off operation in the protection function, the alarm contacts 101b and 102b remain in the on state. That is, the on state of the alarm contacts 101b and 102b is detected by the detection circuit 103 for automatic parking operation, and the timer in the detection circuit 103 is operated. Therefore, the control circuit 121 supplies power from the power failure battery 116 to the elevator main circuit 115 while the timer is operating, and the automatic parking operation is performed.

[0059] In addition, the cutter 111 in the elevator control panel 110 is provided with only the auxiliary contact 111a, and is not configured so as to connect the alarm contact in parallel with the auxiliary contact 111a.

[0060] This is because within the elevator control function, in the case of a cutoff caused by overcurrent or leakage of the cutoff machine (main contact operating device), the automatic rescue operation function during a power outage does not work properly. This can reduce the possibility of secondary failures.

[0061] [Control action viewed from the control circuit]

[0062] Figure 3 This is a flowchart showing an example of control operation when shutdown due to overcurrent or leakage is detected in the detection circuit 103 .

[0063] The control circuit 121 monitors the power supply path between the noise filter 113 and the building power supply contactor 114, and determines whether the supply of the main power to the elevator main circuit 115 is stopped (step S11).

[0064] Here, when the supply of the main power is not stopped (No in step S11 ), the control circuit 121 repeats the determination in step S11 .

[0065] Then, when it is determined in step S11 that the supply of the main power supply is stopped (Yes in step S11), the control circuit 121 determines whether the timer of the detection circuit 103 is in operation (step S12). When the timer of the detection circuit 103 is in operation in step S12, that is, when the alarm contacts 101b and 102b are detected to be connected (Yes in step S12), the control circuit 121 supplies power from the power failure battery 116 to the elevator main circuit 115, and performs automatic parking operation (step S13).

[0066] That is, after the automatic parking operation is started in step S13, the judgment returns to step S12, and the automatic parking operation is executed while the timer is in operation. The automatic parking operation is an operation that stops the car at the nearest floor for, for example, several seconds.

[0067] Then, when the timer of the detection circuit 103 is not in operation in step S12 (No in step S12), the control circuit 121 stops the power supply to the elevator main circuit 115 (step S14), and ends the processing when the main power is supplied to the elevator main circuit 115.

[0068] As described above, according to the elevator power supply control device of this example, when the second disconnecting machine 101 or the third disconnecting machine 102 installed near the entrance 31, 32 of the machine room 30 performs a disconnection operation, the automatic parking operation is not performed, and the operation of the elevator is immediately stopped by the disconnection operation.

[0069] On the other hand, when the second cutter 101 or the third cutter 102 performs a cut-off operation by the overcurrent protection function or the leakage protection function, the automatic parking operation is performed by detecting that the alarm contact 101b or 102b is turned on, and the passengers can be properly rescued.

[0070] Furthermore, even if the overcurrent protection function or the leakage protection function is used to cut off the first cutter 111 provided in the elevator control panel 110, the automatic stop operation is not performed. Thus, when the automatic stop operation function may not work properly during a power outage, the automatic stop operation can be prevented from being performed.

[0071] [Modifications]

[0072] In addition, the embodiment examples described so far have been described in detail in order to explain the present invention in an easily understandable manner, and are not necessarily limited to those having all the described configurations.

[0073] For example, in Figure 1 In the structure, two entrances and exits 31 and 32 are provided in the machine room 30, and the cutting machines 101 and 102 are provided in the respective entrances and exits 31 and 32. In contrast, in the case of a structure in which one entrance and exit is provided in the machine room 30, the third cutting machine 102 may be omitted.

[0074] In addition, the cutting machine may be installed at a location other than near the entrance and exit of the machine room 30 .

[0075] For example, Figure 1 As shown, a cutting machine 105 may also be provided in the bottom pit at the bottom of the lifting passage 10. In this case, the cutting machine 105 is Figure 2 The cutters 101 and 102 shown are similarly connected to the main power supply circuit, and are connected in series with other auxiliary contacts after the auxiliary contacts are connected in parallel with the alarm contacts.

[0076] Thus, the car is immediately stopped by the cutting operation of the cutting machine 105 by the worker in the pit, and when the cutting action is performed by the overcurrent protection function or the leakage protection function in the cutting machine 105, the car is automatically parked during a power outage.

Claims

1. An elevator power supply control device, comprising: A first disconnector is arranged on the control panel, connected to the power circuit supplying the main power, and has a main contact for disconnecting the main power and an auxiliary contact for disconnecting in conjunction with the disconnection of the main contact; A second disconnector is connected to the power circuit at a position different from the control panel, and has a main contact for disconnecting the main power supply and an auxiliary contact for disconnecting in conjunction with the disconnection of the main contact; The elevator main circuit is supplied with main power via the power circuit to which the first disconnector and the second disconnector are connected, thereby obtaining power for driving the elevator; A detection circuit connects each of the auxiliary contacts in series; as well as The control circuit stops the elevator main circuit when the detection circuit detects that any one of the auxiliary contacts is disconnected, and supplies power from a power failure storage battery to the elevator main circuit to perform automatic parking operation of the elevator when the detection circuit detects that the auxiliary contacts are connected and detects that the supply of the main power supply to the elevator main circuit is stopped. The elevator power supply control device is characterized in that: The auxiliary contact of the second disconnecting machine is connected in parallel with an alarm contact which is turned on when the second disconnecting machine detects an abnormality in the main power supply. When the detection circuit detects that the supply of the main power supply is stopped in a state where the alarm contact is detected to be turned on, the control circuit supplies power from the power failure battery to the elevator main circuit to perform an automatic parking operation of the elevator.

2. The elevator power supply control device according to claim 1, wherein: The second cutting machine is arranged near an entrance of a machine room of an elevator.

3. The elevator power supply control device according to claim 1, wherein: The detection circuit includes a timer for counting a certain period of time. When the control circuit detects that the main power supply is disconnected, the control circuit performs automatic parking operation of the elevator while the timer caused by the connection of the alarm contact counts the certain time, and stops the power supply from the power outage battery after the certain time.

4. The elevator power supply control device according to claim 1, wherein: The elevator power supply control device further comprises: a third disconnector connected to the power supply circuit, having a main contact for disconnecting the main power supply, an auxiliary contact disconnected in conjunction with the disconnection of the main contact, and an alarm contact connected in parallel with the auxiliary contact, Connecting each of the auxiliary contacts in series on the detection circuit, When the alarm contact of the third circuit breaker is turned on, the control circuit also supplies power from the power failure battery to the elevator main circuit to perform automatic parking operation of the elevator.

5. An elevator power supply control method, for controlling an elevator power supply device, the elevator power supply device having: A first disconnector is arranged on the control panel, connected to the power circuit supplying the main power, and has a main contact for disconnecting the main power and an auxiliary contact for disconnecting in conjunction with the disconnection of the main contact; A second disconnector is connected to the power circuit at a position different from the control panel, and has a main contact for disconnecting the main power supply, an auxiliary contact disconnected in conjunction with the disconnection of the main contact, and an alarm contact connected in parallel with the auxiliary contact and connected when the power supply is abnormal; as well as The elevator main circuit is supplied with main power via the power circuit to which the first disconnector and the second disconnector are connected, thereby obtaining power for driving the elevator. The elevator power supply control method is characterized in that: Automatic parking operation processing is performed. When it is detected that the main power supply to the elevator main circuit stops when the alarm contact is turned on, power from a power outage battery is supplied to the elevator main circuit to perform automatic parking operation of the elevator.

Images