Elevator device

Abstract

To improve energy efficiency of an elevator device.SOLUTION: An elevator device according to an embodiment includes a hoisting machine, a battery, and a regeneration circuit. The hoisting machine raises and lowers an elevator car and a counterweight. The battery supplies power to an electronic device mounted on the elevator car or the counterweight. The regeneration circuit converts kinetic energy of a rotating body which is rotated with raising / lowering the elevator car and the counterweight into electric energy, and charges the battery with the converted electric energy.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE An embodiment of the present invention relates to an elevator system. [Background technology]

[0002] Conventional counterweights are made of iron, and the control panel and batteries are placed at the top of the elevator. However, because the placement of the control panel and batteries requires mounting space, improvements in mounting efficiency were desired.

[0003] In order to improve the mounting efficiency, there are proposals to place the control panel and the battery inside the counterweight. By placing the control panel and the battery inside the counterweight, the labor required for the elevator installation work can be reduced. These proposals disclose a technology to charge the battery placed inside the counterweight by contact or non-contact from a charging device installed in the hoistway. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-14424 A [Patent Document 2] JP 2002-249285 A

[0005] When the lifting speed of the car and the counterweight of an elevator system is reduced, the rotational speed of the hoist is reduced by an electromagnetic brake, a disk brake, etc. The kinetic energy of the hoist slowed down by the electromagnetic brake, the disk brake, etc. is lost as heat energy. In view of this lost energy, there seems to be room for improvement in energy efficiency. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to improve the energy efficiency of an elevator system. [Means for solving the problem]

[0007] An elevator system according to an embodiment for solving the above problems includes a hoist, a battery, and a regenerative circuit. The hoist raises and lowers a car and a counterweight. The battery supplies power to electronic devices mounted on the car or the counterweight. The regenerative circuit converts the kinetic energy of a rotating body that rotates in association with the raising and lowering of the car and the counterweight into electrical energy, and charges the battery with the converted electrical energy. [Brief description of the drawings]

[0008] [Figure 1] 1 is a configuration diagram of an elevator device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a configuration diagram of a car of the elevator apparatus according to the present embodiment. [Diagram 3] FIG. 2 is a block diagram of a regenerative circuit implemented in the car according to the present embodiment. [Figure 4] FIG. 2 is a configuration diagram of a counterweight of the elevator apparatus according to the present embodiment. [Diagram 5] FIG. 2 is a block diagram of a regenerative circuit implemented in the counterweight according to the present embodiment. [Figure 6] 5 is a flowchart for explaining a battery charging process by a regenerative circuit according to the embodiment. [Figure 7] 4 is a diagram for explaining a rotating body connected to a regenerative circuit according to the embodiment; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, this embodiment will be described with reference to the drawings. Fig. 1 is a configuration diagram of an elevator system 10 according to this embodiment. The elevator system 10 is disposed inside a hoistway 100 provided in a building such as a commercial facility or residential facility. As shown in Fig. 1, the elevator system 10 has a car 31, a counterweight (balancing weight) 35, a guide rail 21, etc. The guide rail 21 is composed of a plurality of rails.

[0010] The car 31 and the counterweight 35 are connected by a wire 45 via sheaves 46, 47, and 48. The sheaves 46, 47, and 48 are members that change the direction of the force transmitted by the wire 45. The guide rail 21 is a member for guiding the car 31 and the counterweight 35 so that they can be raised and lowered. A plurality of roller guides 23 are provided between the counterweight 35 and the guide rail 21. A plurality of roller guides 24 are provided between the car 31 and the guide rail 21. The roller guides 23 and 24 are members for reducing friction and impact between the car 31 and the counterweight 35 and the guide rail 21. The roller guides 23 and 24 are made of resin such as rubber. The roller guides 23 and 24 are rotating bodies that rotate due to friction with the guide rail 21 accompanying the raising and lowering of the car 31 and the counterweight 35.

[0011] The car 31 is a unit that accommodates passengers and moves them up and down the elevator shaft 100. The car 31 is attached so as to be movable in the vertical direction along the guide rails 21. Fig. 2 is a configuration diagram of the car 31. As shown in Fig. 2, a control panel 80, a regenerative circuit 60, a speed sensor 61, a battery 67, an opening / closing motor 41, etc. are mounted inside the car 31.

[0012] The control panel 80 has a control unit 81 and a drive unit 82. The drive unit 82 drives the opening / closing motor 41, which opens and closes the door of the car 31, by supplying power to the opening / closing motor 41. The drive unit 82 drives the opening / closing motor 41 based on instructions from the control unit 81.

[0013] The control unit 81 controls the drive unit 82 based on an operation panel or a signal notifying that the car has landed at the destination floor. For example, when the control unit 81 rotates the opening / closing motor 41 in the forward direction via the drive unit 82, the door of the car 31 opens. When the control unit 81 rotates the opening / closing motor 41 in the reverse direction via the drive unit 82, the door of the car 31 closes.

[0014] The regenerative circuit 60 is a circuit that converts the kinetic energy (rotational energy) of a rotating body that rotates with the ascending and descending movement of the car 31 into electrical energy, and charges the converted electrical energy into a battery 67. The rotating body provided in the car 31 is the sheave 48 and the roller guide 24 shown in FIG. 1. The regenerative circuit 60 provided in the sheave 48 converts the rotational energy of the sheave 48 into electrical energy to charge the battery 67. In addition, the regenerative circuit 60 provided in the roller guide 24 converts the rotational energy of the roller guide 24 into electrical energy to charge the battery 67. When there are multiple roller guides 24, the regenerative circuit 60 may be provided corresponding to all of the roller guides or may be provided corresponding to any of the roller guides.

[0015] The speed sensor 61 is a sensor that measures the ascending and descending speed of the car 31. The speed sensor 61 may be a device that measures the distance between the car 31 and the floor surface and measures the speed based on the amount of change in the measured distance per unit time. In this case, the speed sensor 61 is composed of a sensor that measures the distance and a unit that calculates the speed, but the speed calculation may be performed by the control unit 81. The battery 67 is a member that supplies power to electronic devices mounted on the car 31 (for example, the opening / closing motor 41, the lighting device in the car 31, etc.). The battery 67 has a charge monitoring sensor 671 that monitors the charge state of the battery 67. The charge monitoring sensor 671 notifies the regeneration circuit 60 of information on whether the battery 67 is in a fully charged state or not.

[0016] 3 is a block diagram of the regeneration circuit 60. The regeneration circuit 60 includes a transmission means 62, a power generation unit 63, a conversion unit 64, a switching unit 65, and a heating resistor 66.

[0017] The transmission means 62 is a mechanism that transmits the kinetic energy of the rotating body that rotates with the lifting and lowering operation of the car 31 to the regeneration circuit 60. When the transmission means 62 detects that the lifting and lowering speed of the car 31 has decelerated based on a signal received from the speed sensor 61, the transmission means 62 transmits the kinetic energy (rotational energy) of the sheave 48 and the roller guide 24, which are rotating bodies, to the power generation unit 63. The transmission means 62 is composed of software installed in a storage unit, gears, belts, chains, etc. For example, the transmission means 62 transmits the kinetic energy associated with the rotation of the sheave 48, which is a rotating body, to the regeneration circuit 60 by meshing a gear fitted to the rotating shaft of the sheave 48 with a gear fitted to the rotating shaft of the motor that constitutes the power generation unit 63. When the lifting speed of the car 31 is not decelerating, the transmission means 62, for example, separates a gear engaged with the rotating shaft of the sheave 48 from a gear engaged with the rotating shaft of the motor constituting the power generation unit 63, thereby preventing the kinetic energy of the rotating body from being transmitted to the power generation unit 63. The software constituting the transmission means 62 may be mounted on the control unit 81.

[0018] The power generating unit 63 generates electric energy using the rotational energy of the sheave 48 and the roller guide 24, which are rotating bodies, as power. The power generating unit 63 is composed of, for example, a motor. The rotating shaft of the motor constituting the power generating unit 63 rotates by the kinetic energy (rotational energy) of the sheave 48 and the roller guide 24 transmitted via the transmission means 62. This rotation causes the motor constituting the power generating unit 63 to output a current. Since the rotational directions of the sheave 48 and the roller guide 24 are opposite when the car 31 rises and descends, the rotational direction of the rotating shaft of the motor constituting the power generating unit 63 is opposite when the car 31 rises and descends. Therefore, the output current of the power generating unit 63 is opposite when the car 31 rises and descends. Therefore, the power generating unit 63 outputs an AC current (AC voltage).

[0019] The conversion unit 64 converts the AC current output from the power generation unit 63 into a DC current. The conversion unit 64 has a rectification unit 641 and a current drive unit 642. The rectification unit 641 is configured with, for example, a diode bridge. The rectification unit 641 supplies the rectified DC current (DC voltage) to the current drive unit 642. The current drive unit 642 is configured with, for example, a DC / DC converter. The current drive unit 642 converts the input DC current (DC voltage) into a voltage and current suitable for charging the battery 67.

[0020] The heating resistor 66 is composed of a resistor and a heat dissipating member, etc. The heating resistor 66 is a member for converting electrical energy into thermal energy and dissipating heat.

[0021] The switching unit 65 is a circuit for switching the connection destination of the output of the conversion unit 64 between the battery 67 and the heating resistor 66. The switching unit 65 receives a signal indicating the charging state of the battery 67 from the charging monitoring sensor 671, and connects the output of the conversion unit 64 to the battery 67 if the battery 67 is not fully charged, and connects the output of the conversion unit 64 to the heating resistor 66 if the battery 67 is fully charged.

[0022] Returning to Fig. 1, the counterweight 35 is attached so as to be movable up and down relative to the guide rail 21. The weight of the counterweight 35 is adjusted to be a predetermined ratio to the weight of the car 31.

[0023] Fig. 4 is a configuration diagram of the counterweight 35. As shown in Fig. 4, a control panel 70, a regenerative circuit 50, a speed sensor 51, a battery 57, and a lifting motor 40 are mounted inside the counterweight 35. The lifting motor 40 is disposed on the upper part of the counterweight 35. The lifting motor 40 is a motor for lifting and lowering the car 31. When a sheave 46 attached to the rotating shaft of the lifting motor 40 rotates, the car 31 and the counterweight 35 move up and down in a bucket-like manner via a wire 45 wound around the sheave 46. The speed sensor 51 is a device for measuring the rotation speed of the lifting motor 40.

[0024] The control panel 70 has a control unit 71 and a drive unit 72. The drive unit 72 drives the lift motor 40 by supplying power to the lift motor 40. The drive unit 72 drives the lift motor 40 based on an instruction from the control unit 71.

[0025] The control unit 71 controls the drive unit 72 based on input from the operation panel or the call panel of each floor. For example, when the control unit 71 rotates the lift motor 40 in the forward direction via the drive unit 72, the car 31 rises and the counterweight 35 descends. When the control unit 71 rotates the lift motor 40 in the reverse direction via the drive unit 72, the car 31 descends and the counterweight 35 rises.

[0026] The battery 57 is a member that supplies power to electronic devices (e.g., the lift motor 40) mounted on the counterweight 35. The regenerative circuit 50 is a circuit that generates electrical energy by the rotation of a rotating body that rotates as the counterweight 35 rises and falls, and charges the generated electrical energy to the battery 57. The rotating body provided on the counterweight 35 is the sheave 46 and roller guide 23 that rotate as the lift motor 40 rotates.

[0027] FIG. 5 is a block diagram of the regenerative circuit 50. The regenerative circuit 50 includes a transmission means 52, a power generation unit 53, a conversion unit 54, a switching unit 55, and a heating resistor 56. The conversion unit 54 includes a rectification unit 541 and a current drive unit 542. When the transmission means 52 detects that the rotation speed of the lift motor (hoisting machine) 40 has decreased based on the measurement result of the speed sensor 51 that measures the rotation speed of the lift motor (hoisting machine) 40, the transmission means 52 transmits kinetic energy accompanying the rotation of the sheave 46 and the roller guide 23, which are rotors, to the regenerative circuit 50. The kinetic energy (rotational energy) of the sheave 46 and the roller guide 23 is transmitted to the power generation unit 53 via the transmission means 52. The power generation unit 53 generates electric energy using the rotational energy of the sheave 46 and the roller guide 23 as motive power. The rest of the description of the regenerative circuit 50 is the same as that of the regenerative circuit 60, so it will be omitted.

[0028] Next, the charging process of the battery 57 by the regenerative circuit 50 provided in correspondence with the sheave 46 of the counterweight 35 will be described with reference to FIGS.

[0029] The elevator car 31 and the counterweight 35 move up and down due to the rotation of the elevator motor 40. When the counterweight 35 starts to move up and down, the regenerative circuit 50 is disconnected from the sheave 46 by the transmission means 52. The rotation speed of the elevator motor 40 is measured by the speed sensor 51 and notified to the transmission means 52. In addition, the charging state of the battery 57 is notified to the switching unit 55 of the regenerative circuit 50 by the charging monitoring sensor 571.

[0030] If the rotation speed of the lift motor 40 is not decelerating (step S11: No), the transmission means 52 keeps the rotating shaft of the motor constituting the power generation unit 53 from rotating due to the rotation of the sheave 46. On the other hand, if the rotation speed of the lift motor 40 is decelerating due to an electromagnetic brake, a disc brake, or the like (step S11: Yes), the transmission means 52 keeps the rotating shaft of the motor constituting the power generation unit 53 connected to the rotating shaft of the sheave 46 (step S12).

[0031] The rotation of the sheave 46 accompanying the lifting and lowering movement of the car 31 and the counterweight 35 is transmitted to the rotating shaft of the motor constituting the power generating unit 53 by the transmission means 52, and the rotating shaft of the motor constituting the power generating unit 53 rotates. The power generating unit 53 converts kinetic energy (rotational energy) into electrical energy by the rotation of the motor constituting the power generating unit 53, and outputs a direct current (step S13).

[0032] The rotation directions of the lift motor 40 and the sheave 46 are opposite when the counterweight 35 rises and falls. Therefore, the voltage output by the power generation unit 53 has opposite polarity when the counterweight 35 rises and falls. The rectifier unit 541 of the conversion unit 54 rectifies the voltage input to the current drive unit 542 so that the voltage polarity is the same when the counterweight 35 rises and falls. The current drive unit 542 then converts the input DC current (DC voltage) into a voltage and current suitable for charging the battery 57.

[0033] The charging state of the battery 57 is notified to the regeneration circuit 50 by the charging monitoring sensor 571. If the battery 57 is not saturated (fully charged) (step S14: No), the switching unit 55 connects the output of the conversion unit 54 to the battery 57 (step S15). The direct current output from the regeneration circuit 50 is charged into the battery 57 (step S16). In this way, if the battery 57 is not saturated, the energy efficiency of the elevator apparatus 10 is improved by charging the battery 57 with regenerative energy obtained by converting the kinetic energy (rotational energy) of the sheave 46 into electrical energy.

[0034] Furthermore, as a portion of the rotational energy of the sheave 46 is converted into electrical energy, regenerative braking is applied to the lift motor 40 connected to the sheave 46. The regenerative braking reduces the rotational speed of the lift motor 40 caused by the inertial force of the car 31 and the counterweight 35. The application of regenerative braking reduces the braking load on the electromagnetic brake and disc brake, thereby reducing wear on the electromagnetic brake and disc brake. Furthermore, the reduction in the rotational speed of the lift motor 40 reduces slippage between the wire and the lift motor 40 (or the sheave 46). The reduced slippage increases the traction force of the lift motor 40 (or the sheave 46).

[0035] On the other hand, if the battery 57 is saturated (fully charged) (step S14: Yes), the switching unit 55 connects the output of the conversion unit 54 to the heating resistor 56 (step S17). The direct current output from the regenerative circuit 50 is converted into thermal energy by the heating resistor 56 and dissipated (step S18). In this way, when the battery 57 is saturated, the kinetic energy (rotational energy) of the sheave 46 is dissipated as thermal energy, and regenerative braking is applied to the lift motor 40 connected to the sheave 46. In other words, by applying regenerative braking whether the battery 57 is saturated or not, the braking load on the electromagnetic brake and the disc brake is reduced, and wear on the electromagnetic brake and the disc brake is reduced.

[0036] The charging process of the battery 57 by the regenerative circuit 50 provided on the roller guide 23 mounted on the counterweight 35 will be omitted since it is the same as the above. Also, the charging process of the battery 67 by the regenerative circuit 60 mounted on the car 31 will be omitted since it is the same as the above.

[0037] FIG. 7 shows four different charge states of the battery 57 mounted on the counterweight 35 and the battery 67 mounted on the car 31, and shows the rotating body connected to the regenerative circuit according to the charge state.

[0038] Pattern 1 is a case where both the battery 57 mounted on the counterweight 35 and the battery 67 mounted on the car 31 are fully charged. In this case, the regenerative circuit 50 mounted on the counterweight 35 is not connected to the roller guide 23 and the sheave 46. Therefore, the battery 57 is not charged by the regenerative circuit 50 mounted on the counterweight 35. The kinetic energy of the roller guide 23 and the sheave 46 is dissipated as thermal energy by the heating resistor 56. In addition, the regenerative circuit 60 mounted on the car 31 is not connected to the roller guide 24 and the sheave 48. Therefore, the battery 67 is not charged by the regenerative circuit 60 mounted on the car 31. The kinetic energy of the roller guide 24 and the sheave 48 is dissipated as thermal energy by the heating resistor 66.

[0039] Pattern 2 is a case where the battery 57 mounted on the counterweight 35 has room to be charged, and the battery 67 mounted on the car 31 is fully charged. In this case, the regenerative circuit 50 mounted on the counterweight 35 is connected to the roller guide 23 and the sheave 46. Therefore, the battery 57 is charged by the regenerative circuit 50 mounted on the counterweight 35. In addition, the regenerative circuit 60 mounted on the car 31 is not connected to the roller guide 24 and the sheave 48. Therefore, the battery 67 is not charged by the regenerative circuit 60 mounted on the car 31. The kinetic energy of the roller guide 24 and the sheave 48 is dissipated as heat energy by the heating resistor 66.

[0040] Pattern 3 is a case where the battery 57 mounted on the counterweight 35 is fully charged and the battery 67 mounted on the car 31 has room for charging. In this case, the regenerative circuit 50 mounted on the counterweight 35 is not connected to the roller guide 23 and the sheave 46. Therefore, the battery 57 is not charged by the regenerative circuit 50 mounted on the counterweight 35. The kinetic energy of the roller guide 23 and the sheave 46 is dissipated as heat energy by the heating resistor 56. In addition, the regenerative circuit 60 mounted on the car 31 is connected to the roller guide 24 and the sheave 48. Therefore, the battery 67 is charged by the regenerative circuit 60 mounted on the car 31.

[0041] Pattern 4 is a case where there is room for charging both the battery 57 mounted on the counterweight 35 and the battery 67 mounted on the car 31. In this case, the regenerative circuit 50 mounted on the counterweight 35 is connected to the roller guide 23 and the sheave 46. Therefore, the battery 57 is charged by the regenerative circuit 50 mounted on the counterweight 35. In addition, the regenerative circuit 60 mounted on the car 31 is connected to the roller guide 24 and the sheave 48. Therefore, the battery 67 is charged by the regenerative circuit 60 mounted on the car 31.

[0042] As described above, the elevator system 10 according to the embodiment converts the kinetic energy (rotational energy) of the rotating body (sheave and roller guide) that rotates with the elevation of the car 31 and the counterweight 35 into electrical energy, and charges the converted electrical energy into a battery. In this way, the energy efficiency of the elevator system 10 can be improved by regeneratively utilizing the rotational energy of the rotating body as electrical energy.

[0043] Moreover, the regenerative circuits 50 and 60 of the elevator apparatus 10 according to the embodiment have transmission means 52 and 62 that transmit the kinetic energy of the rotating body (the sheave and the roller guide) to the regenerative circuits 50 and 60. When the transmission means 52 and 62 detect that the lifting and lowering speeds of the car 31 and the counterweight 35 have decelerated, they transmit the kinetic energy of the rotating body to the regenerative circuits 50 and 60. As a result, the elevator apparatus 10 according to the embodiment can utilize the energy lost as heat energy in the lift motor 40 and the rotating body as electric energy, thereby improving the energy efficiency of the elevator apparatus.

[0044] Moreover, the elevator device 10 according to the embodiment has a switching unit that switches the connection destination of the output of the regenerative circuit 50 and the regenerative circuit 60 to the battery or the heating resistor, and connects the output of the regenerative circuit to the battery when the battery is not fully charged, and connects the output of the regenerative circuit to the heating resistor when the battery is fully charged. In this way, by not further charging the battery when it is fully charged, it is possible to prevent damage to the battery due to overcharging. In addition, by applying regenerative braking whether the battery is saturated or not, it is possible to reduce the burden on the electromagnetic brake and the disc brake as a braking function, and it is possible to reduce wear of the electromagnetic brake and the disc brake. In addition, since the rotation speed of the sheave is reduced by the regenerative brake, it is possible to increase the frictional resistance between the sheave and the wire, and it is possible to improve safety. It also has the effect of reducing wear of the wire. By reducing wear of the brake and the wire in this way, it is also possible to extend the life of the device.

[0045] In addition, the elevator system 10 according to the embodiment balances the brakes of the entire elevator system by installing regenerative circuits in both the car 31 and the counterweight 35. This is expected to have the effect of suppressing the deflection of the wires.

[0046] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the above description, the regenerative circuit is mounted on both the car 31 and the counterweight 35. However, if there is no risk of wire bending due to providing the regenerative circuit on only one of the car 31 or the counterweight 35, the regenerative circuit may be mounted on only one side. In addition, in the above description, the regenerative circuit is provided on each of the multiple rotating bodies such as the sheave and the roller guide, but it is not necessary to provide the regenerative circuit on all the rotating bodies, and the regenerative circuit may be mounted on any of the rotating bodies.

[0047] In the above description, the battery 57 is charged by the regenerative circuit 50, and the battery 67 is charged by the regenerative circuit 60. However, the battery 57 and the battery 67 can be charged by other charging devices by contact or non-contact.

[0048] In addition, in the above explanation, the regenerative circuit 50 is mounted on the counterweight 35 and connected to the sheave 46 attached to the rotating shaft of the lift motor 40, but the regenerative circuit 50 may also be connected to the lift motor 40.

[0049] In addition, in the above explanation, the conversion unit has a rectification unit and a current driving unit, but if the output voltage of the power generation unit is a voltage capable of charging a battery, the current driving unit may be omitted.

[0050] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0051] 10 Elevator equipment 21 Guide rail 23, 24 Roller guide 31 Car 35 Counterweight 40 Lifting motor 41 Opening and closing motor 45 Wire 46, 47, 48 Sheaves 50, 60 regeneration circuit 51, 61 Speed ​​sensor 52, 62 Means of communication 53, 63 Power Generation Division 54, 64 conversion unit 541, 641 Rectifier 542, 642 Current driver 55, 65 Switching section 56, 66 Heating resistor 57, 67 Battery 571, 671 Charging monitoring sensor 70, 80 Control panel 71, 81 Control unit 72, 82 Drive unit 100 Hoistway

Claims

1. A hoist that raises and lowers the car and the counterweight; a battery that supplies power to electronic devices mounted on the car or the counterweight; a regeneration circuit that converts kinetic energy of a rotating body that rotates in association with the elevation and lowering of the car and the counterweight into electrical energy and charges the battery with the converted electrical energy; An elevator apparatus having the above structure.

2. the regenerative circuit has a transmission means for transmitting kinetic energy of the rotating body to the regenerative circuit, The transmission means is When it is detected that the ascending and descending speed of the car and the counterweight has decelerated based on the measurement result of a speed sensor that measures the ascending and descending speed of the car and the counterweight, or when it is detected that the rotational speed of the hoisting machine has decelerated based on the measurement result of a speed sensor that measures the rotational speed of the hoisting machine, the kinetic energy associated with the rotation of the rotating body is transmitted to the regenerative circuit.

2. The elevator system of claim 1.

3. The regenerative circuit includes: A power generation unit that generates power using the rotation of the rotor as power; a conversion unit that converts the AC current output from the power generation unit into a DC current; having 2. The elevator system of claim 1.

4. the battery has a charge monitoring sensor that monitors a charge state of the battery; the regenerative circuit has a heating resistor and a switching unit that switches a connection destination of an output of the conversion unit between the battery and the heating resistor, The switching unit is When the charging monitoring sensor detects that the battery is not fully charged, the output of the conversion unit is connected to the battery; When the charging monitoring sensor detects that the battery is fully charged, the output of the conversion unit is switched to the heating resistor.

4. The elevator system of claim 3.

5. The rotating body is At least one of a motor constituting the hoist, a sheave which is a member for changing the direction of a force transmitted by a wire connecting the car and the counterweight, and a roller guide provided between the car and a guide rail, and between the counterweight and the guide rail. An elevator installation according to any one of claims 1 to 4.

6. The battery and the regenerative circuit are mounted on the car and the counterweight, The regenerative circuit mounted on the car converts rotational energy generated by rotation of a roller guide disposed between the car and a guide rail or a sheave provided on the car into electrical energy to charge a battery mounted on the car; a regenerative circuit mounted on the counterweight converts rotational energy generated by rotation of a roller guide disposed between the counterweight and a guide rail or a sheave provided on the counterweight into electrical energy to charge a battery mounted on the counterweight; An elevator installation according to any one of claims 1 to 4.

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