JP7476405B1 - Elevator Equipment - Google Patents

Abstract

[Problem] To improve the energy efficiency of an elevator system. [Solution] An elevator system according to an embodiment has a hoist, a battery, and a regenerative circuit. The hoist operates to raise and lower 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 as the car and the counterweight rise and fall into electrical energy, and charges the battery with the converted electrical energy. [Selected Figure] Figure 5

Description

An embodiment of the present invention relates to an elevator device.

Conventionally, the counterweight was a lump of iron, and the control panel and battery were placed at the top of the elevator. However, the placement of the control panel and battery requires mounting space, so improvements in mounting efficiency were desired.

To improve mounting efficiency, there are proposals to place the control panel and battery inside the counterweight. Placing the control panel and battery inside the counterweight can also reduce the labor required for elevator equipment installation work. These proposals disclose technology that charges the battery placed inside the counterweight with or without contact from a charging device installed in the hoistway.

JP 2013-14424 A JP 2002-249285 A

When reducing the lifting speed of the car and counterweight of an elevator system, the rotational speed of the hoist is reduced by using an electromagnetic brake, disc brake, or the like. The kinetic energy of the hoist slowed down by the electromagnetic brake, disc brake, or the like is lost as heat energy. Focusing on this lost energy, it seems there is room for improvement in energy efficiency.

The present invention was made in light of the above circumstances, and aims to improve the energy efficiency of elevator systems.

An elevator device according to an embodiment for solving the above problem includes a hoist, a battery, a regenerative circuit, and a control panel . The hoist is disposed on the top of the counterweight and raises and lowers the car and the counterweight. The battery is mounted on the counterweight and supplies power to electronic devices mounted on the counterweight. The regenerative circuit converts the kinetic energy of a rotating body that rotates as the counterweight rises and falls into electrical energy, and charges the battery with the converted electrical energy. The control panel is mounted on the counterweight and supplies power to the hoist to drive the hoist. The regenerative circuit includes a power generation unit that generates power using the rotation of the rotating body as power, and a conversion unit that converts the AC current output from the power generation unit into a DC current. The battery includes a charge monitoring sensor that monitors the charging state of the battery. The regenerative circuit includes a heating resistor and a switching unit that switches the connection destination of the conversion unit's output between the battery and the heating resistor. The switching unit connects the output of the conversion unit to the battery when the charging monitoring sensor detects that the battery is not fully charged, and switches the output of the conversion unit to the heating resistor when the charging monitoring sensor detects that the battery is fully charged.

1 is a configuration diagram of an elevator device according to an embodiment of the present invention. FIG. 2 is a configuration diagram of a car of the elevator apparatus according to the present embodiment. FIG. 2 is a block diagram of a regenerative circuit implemented in the car according to the present embodiment. FIG. 2 is a configuration diagram of a counterweight of the elevator apparatus according to the present embodiment. FIG. 2 is a block diagram of a regenerative circuit implemented in the counterweight according to the embodiment. 5 is a flowchart for explaining a battery charging process by a regenerative circuit according to the embodiment. 4 is a diagram for explaining a rotating body connected to a regenerative circuit according to the embodiment; FIG.

The present embodiment will be described below 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 35, a guide rail 21, and the like. The guide rail 21 is composed of a plurality of rails.

The car 31 and the counterweight 35 are connected by 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 as the car 31 and the counterweight 35 rise and fall.

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 that it can move up and down along the guide rails 21. Figure 2 is a configuration diagram of the car 31. As shown in Figure 2, the car 31 contains a control panel 80, a regenerative circuit 60, a speed sensor 61, a battery 67, an opening/closing motor 41, etc.

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.

The control unit 81 controls the drive unit 82 based on an operation panel or a signal indicating 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.

The regenerative circuit 60 is a circuit that converts the kinetic energy (rotational energy) of the rotating body that rotates with the lifting and lowering movement of the car 31 into electrical energy and charges the battery 67 with the converted electrical energy. 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. 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.

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 (e.g., the opening and closing motor 41, the lighting device in the car 31, etc.). The battery 67 has a charge monitoring sensor 671 that monitors the charging state of the battery 67. The charge monitoring sensor 671 notifies the regeneration circuit 60 of information on whether the battery 67 is fully charged or not.

Figure 3 is a block diagram of the regenerative circuit 60. The regenerative circuit 60 has a transmission means 62, a power generation unit 63, a conversion unit 64, a switching unit 65, and a heating resistor 66.

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 regenerative circuit 60. When the transmission means 62 detects that the lifting and lowering speed of the car 31 has decelerated based on the signal received from the speed sensor 61, it transmits the kinetic energy (rotational energy) of the sheave 48 and roller guide 24, which are rotating bodies, to the power generation unit 63. The transmission means 62 is composed of software installed in the memory 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 regenerative 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 the gear engaged with the rotating shaft of the sheave 48 from the gear engaged with the rotating shaft of the motor constituting the power generation unit 63, so as not to transmit the kinetic energy of the rotating body to the power generation unit 63. The software constituting the transmission means 62 may be installed in the control unit 81.

The power generating unit 63 generates electric energy using the rotational energy of the sheave 48 and 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 due to the kinetic energy (rotational energy) of the sheave 48 and roller guide 24 transmitted via the transmission means 62. This rotation causes the motor constituting the power generating unit 63 to output current. Since the rotation direction of the sheave 48 and roller guide 24 is reversed when the car 31 rises and descends, the rotation direction of the rotating shaft of the motor constituting the power generating unit 63 is reversed when the car 31 rises and descends. Therefore, the output current of the power generating unit 63 is in the opposite direction when the car 31 rises and descends. Therefore, the power generating unit 63 outputs AC current (AC voltage).

The conversion unit 64 converts the AC current output from the power generation unit 63 into DC current. The conversion unit 64 has a rectification unit 641 and a current drive unit 642. The rectification unit 641 is configured, for example, by 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, for example, by 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.

The heating resistor 66 is composed of a resistor and a heat dissipation member. The heating resistor 66 is a member that converts electrical energy into thermal energy and dissipates heat.

The switching unit 65 is a circuit for switching the connection destination of the output of the conversion unit 64 to the battery 67 or 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.

Returning to FIG. 1, the counterweight 35 is attached to the guide rail 21 so that it can move up and down. The weight of the counterweight 35 is adjusted to be a predetermined ratio to the weight of the car 31.

Figure 4 is a diagram showing the configuration of the counterweight 35. As shown in Figure 4, the counterweight 35 contains a control panel 70, a regenerative circuit 50, a speed sensor 51, a battery 57, and a lift motor 40. The lift motor 40 is disposed on top of the counterweight 35. The lift motor 40 is a motor for raising and lowering the car 31. When a sheave 46 attached to the rotating shaft of the lift motor 40 rotates, the car 31 and the counterweight 35 rise and fall 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 lift motor 40.

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 instructions from the control unit 71.

The control unit 71 controls the drive unit 72 based on input from the operation panel or the call panel on 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.

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.

Figure 5 is a block diagram of the regenerative circuit 50. The regenerative circuit 50 has 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 has a rectification unit 541 and a current drive unit 542. When the transmission means 52 detects that the rotation speed of the lift motor 40 has decreased based on the measurement result of the speed sensor 51 that measures the rotation speed of the lift motor (hoist) 40, it transmits the kinetic energy accompanying the rotation of the sheave 46 and the roller guide 23, which are rotating bodies, 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 electrical energy using the rotational energy of the sheave 46 and the roller guide 23 as 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.

Next, with reference to Figures 5 and 6, we will explain the charging process of the battery 57 by the regenerative circuit 50 provided in correspondence with the sheave 46 of the counterweight 35.

The elevator car 31 and 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.

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 that constitutes 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, disc brake, etc. (step S11: Yes), the transmission means 52 keeps the rotating shaft of the motor that constitutes the power generation unit 53 connected to the rotating shaft of the sheave 46 (step S12).

The rotation of the sheave 46 caused by 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).

When the counterweight 35 rises and falls, the lifting motor 40 and the sheave 46 rotate in opposite directions. Therefore, the voltage output by the power generating unit 53 has opposite polarity when the counterweight 35 rises and falls. The rectifying unit 541 of the conversion unit 54 rectifies the voltage input to the current driving unit 542 so that it has the same polarity when the counterweight 35 rises and falls. The current driving unit 542 then converts the input direct current (direct current voltage) into a voltage and current suitable for charging the battery 57.

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 to the battery 57 (step S16). In this way, when the battery 57 is not saturated, the energy efficiency of the elevator device 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.

In addition, by converting a portion of the rotational energy of the sheave 46 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. By applying regenerative braking, the braking load on the electromagnetic brake and disc brake is reduced, thereby reducing wear on the electromagnetic brake and disc brake. In addition, by reducing the rotational speed of the lift motor 40, slippage between the wire and the lift motor 40 (or the sheave 46) is reduced. By reducing the slippage, the traction force of the lift motor 40 (or the sheave 46) is increased.

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 to 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 disc brake is reduced, and wear on the electromagnetic brake and disc brake is reduced.

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

Figure 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 the rotating body connected to the regenerative circuit according to the charge state.

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 heat 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 heat energy by the heating resistor 66.

Pattern 2 is a case where the battery 57 mounted on the counterweight 35 has room to charge, 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.

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 to be 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 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.

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.

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 as the car 31 and counterweight 35 rise and fall 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.

The regenerative circuits 50 and 60 of the elevator device 10 according to the embodiment have transmission means 52 and 62 that transmit the kinetic energy of the rotating body (the sheave and roller guide) to the regenerative circuits 50 and 60. When the transmission means 52 and 62 detect that the lifting speed of the car 31 and the counterweight 35 has slowed down, they transmit the kinetic energy of the rotating body to the regenerative circuits 50 and 60. As a result, the elevator device 10 according to the embodiment can utilize the energy lost as heat energy in the lift motor 40 and the rotating body as electrical energy, thereby improving the energy efficiency of the elevator device.

The elevator device 10 according to the embodiment has a switching unit that switches the connection destination of the regenerative circuit 50 and the regenerative circuit 60 outputs to the battery or the heating resistor, and connects the regenerative circuit outputs to the battery when the battery is not fully charged, and connects the regenerative circuit outputs 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 on the electromagnetic brake and the disc brake. In addition, since the rotation speed of the sheave is reduced by regenerative braking, 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 on the wire. By reducing wear on the brake and the wire in this way, it is also possible to extend the life of the device.

In addition, the elevator system 10 according to the embodiment is equipped with regenerative circuits in both the car 31 and the counterweight 35, thereby balancing the brakes of the entire elevator system. This is expected to have the effect of suppressing wire deflection, etc.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, the above description has been given of a case where the regenerative circuit is installed in both the car 31 and the counterweight 35. However, if there is no risk of wire bending due to providing a regenerative circuit in only one of the car 31 or the counterweight 35, the regenerative circuit may be installed on only one side. In addition, the above description has been given of a case where a regenerative circuit is provided in each of multiple rotating bodies such as sheaves and roller guides, but it is not necessary to provide a regenerative circuit in all rotating bodies, and the regenerative circuit may be installed in any of the rotating bodies.

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 also be charged by other charging devices, both contact and non-contact.

In addition, in the above description, 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.

In addition, in the above explanation, the conversion unit has a rectification unit and a current drive unit, but if the output voltage of the power generation unit is a voltage that can charge the battery, the current drive unit may be omitted.

Although several 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 embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, and are included in the scope of the invention and its equivalents as set forth in the claims.

REFERENCE SIGNS LIST 10 Elevator device 21 Guide rail 23, 24 Roller guide 31 Car 35 Counterweight 40 Lifting motor 41 Opening/closing motor 45 Wire 46, 47, 48 Sheave 50, 60 Regenerative circuit 51, 61 Speed sensor 52, 62 Transmission means 53, 63 Power generation unit 54, 64 Conversion unit 541, 641 Rectification unit 542, 642 Current drive unit 55, 65 Switching unit 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 (4)

A hoisting machine disposed above the counterweight for raising and lowering the car and the counterweight;
a battery mounted on the counterweight for providing power to electronic devices mounted on the counterweight ;
a regeneration circuit that converts the kinetic energy of a rotating body that rotates in association with the elevation and lowering of the counterweight into electrical energy and charges the battery with the converted electrical energy;
A control panel mounted on the counterweight that drives the hoist by supplying power to the hoist;
having
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
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.
Elevator equipment. 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 ascent and descent speed of the counterweight has decelerated based on a measurement result of a speed sensor that measures the ascent and descent speed of the counterweight, or when it is detected that the rotation speed of the hoisting machine has decelerated based on a measurement result of a speed sensor that measures the rotation 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. 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 counterweight and a guide rail.
3. An elevator installation according to claim 1 or 2 . The battery and the regenerative circuit are mounted on the counterweight ,
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;
3. An elevator installation according to claim 1 or 2 .

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