Power generation and supply system using elevator operation

Abstract

The utility model discloses a power generation and supply system utilizing elevator operation. The power generation and supply system comprises a lift car, a power unit, a permanent magnet, a coil, a first relay, a second relay, a battery, a current sensor, a battery sensor and a control unit. When the elevator operates normally, the coil generates electric energy through movement of the permanent magnet, the electric energy is stored through the battery, in the working process, signal parameters of the battery are detected through the battery sensor, and when the battery operates abnormally, the first relay is closed, charging is stopped, battery loss in the charging process is avoided, and the service life of the elevator is prolonged. In the discharging process of the battery, the power supply current of the power unit is detected through a current sensor, the battery is controlled to discharge when the current is not detected, in the discharging process, the power supply current is detected, and when the current is too large or too small, it is indicated that battery discharging fails, and at the moment, the battery is controlled to stop discharging; the battery and the power unit are protected.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator power supply, in particular to a power generation and power supply system utilizing elevator operation. Background Art

[0002] A conventional elevator generally includes a guide rail, a car, a steel cable, a counterweight, and a drive motor, wherein the guide rail is firmly and vertically installed in a shaft in a building, the car moves up and down along the guide rail, one end of the steel cable is connected to the car, the counterweight is connected to the other end of the steel cable, and moves along the guide rail vertically installed on one side of the shaft in a direction opposite to the moving direction of the car without overlapping with the moving path of the car, and the drive motor is installed at the topmost part of the shaft, in frictional contact with the steel cable, and lifts / lowers the car and the counterweight by forward / reverse rotation.

[0003] During the use of elevators, their operation process consumes a lot of energy. How to save energy during the operation of elevators is the focus of current elevator energy saving. In the prior art, the following technologies are disclosed:

[0004] CN203607910U discloses a device for generating electricity using the kinetic energy of an elevator, comprising at least one magnet arranged on the elevator counterweight and at least one coil arranged around the outer ring of the elevator counterweight running track. During the reciprocating motion of the magnet and the elevator counterweight, the coil cuts the magnetic lines of force to generate electric energy and outputs the electric energy to the outside. The utility model utilizes the kinetic energy of the elevator counterweight during the up and down motion to generate electric energy, thereby providing energy for people's production and life, reducing energy consumption, and alleviating the increasingly serious energy problem.

[0005] CN104428234A discloses a power-generating elevator, which includes a car, a drive unit, and a power-generating unit, wherein the car is installed in a shaft formed in a building to carry passengers or goods, the drive unit moves the car vertically along the shaft, and the power-generating unit includes a coil portion installed on the car and a magnetic force generator, wherein the magnetic force generator is installed in the shaft so as to face the coil portion and provide magnetic force to the coil portion, thereby generating an induced electromotive force according to the change of the position of the coil portion while the car moves up or down. Thus, the power-generating elevator includes a coil portion attached to the car and a magnetic force generator arranged at a position facing the coil portion in the shaft, so that electric energy can be generated by the coil portion according to the change of the position of the car while the car reciprocates vertically in the shaft, and the generated electric energy can be used as a power source for vertically moving the car. Therefore, the maintenance cost of the elevator can be reduced.

[0006] CN105460734A discloses a power generation device utilizing the gravity potential energy of an elevator, comprising a car located in an elevator shaft, magnets embedded at intervals on both sides of the elevator shaft, a tension sensor arranged between the car and the steel wire rope, a single-chip microcomputer electrically connected to the tension sensor, and a power generation part; the tension sensor is fixed on the top of the car; the power generation part comprises a turntable, a stepper motor fixed on the car, a coil, a rectifier electrically connected to the coil, and a battery electrically connected to the rectifier; a coil is provided on the rotating shaft of the stepper motor and is fixedly connected to the turntable, the coil is perpendicular to the turntable and fixed on the turntable, and the stepper motor is electrically connected to the single-chip microcomputer. The purpose is to provide a power generation device utilizing the gravity potential energy of an elevator that can improve the utilization rate of the gravity potential energy of the elevator.

[0007] The above prior arts only mention the reuse of energy consumed during the operation of the elevator, but do not specifically involve how to further utilize the generated electricity. Therefore, how to stably, safely, effectively and conveniently reuse the electricity generated based on the energy consumed during the operation of the elevator is a technical problem that urgently needs to be solved. Utility Model Content

[0008] The purpose of the utility model is to provide a power generation and power supply system utilizing the operation of an elevator, so as to stably, safely, effectively and conveniently reuse the electric energy generated by the energy consumed during the operation of the elevator.

[0009] In order to achieve the above purpose, the technical solutions adopted are as follows:

[0010] A power generation and power supply system utilizing elevator operation comprises a car and a power unit, wherein the power unit is connected to the car, and the car is arranged in an elevator shaft.

[0011] Also includes a permanent magnet, a coil, a first relay, a second relay, a battery, a current sensor, a battery sensor and a control unit;

[0012] The permanent magnet is fixed to the car, and the coil is fixed to the side wall of the elevator shaft;

[0013] The coil is connected to the battery circuit, and the first relay is arranged on the connection circuit between the coil and the battery;

[0014] The battery circuit is connected to the power supply circuit of the power unit, and the second relay is arranged on the connection circuit between the circuit and the power supply circuit of the power unit;

[0015] The current sensor is arranged on the power supply line of the power unit, and the battery sensor is electrically connected to the battery;

[0016] The signal input ends of the battery sensor and the current sensor are both connected to the signal input end of the control unit, and the signal output end of the control unit is connected to the signal output ends of the first relay and the second relay.

[0017] Furthermore, the power unit includes a traction machine and a transmission assembly, and the traction machine is connected to the car through the transmission assembly.

[0018] Furthermore, an AC / DC converter and a DC / DC converter are sequentially arranged on the connection line between the coil and the battery, and a DC / AC converter is arranged on the connection line between the battery and the power supply line of the power unit.

[0019] Furthermore, the AC / DC converter is used to convert the alternating current generated by the coil into direct current.

[0020] Furthermore, the DC / DC converter is used to adjust the direct current generated by the AC / DC converter to direct current of a set voltage value.

[0021] Furthermore, the set voltage value is 380V.

[0022] Furthermore, it also includes an auxiliary battery, which is electrically connected to the control unit and is used to supply power to the control unit.

[0023] Furthermore, the battery sensor includes a battery voltage sensor, a battery current sensor and a battery temperature sensor, which are used to collect the voltage signal, current signal and temperature signal of the battery.

[0024] Furthermore, the control unit is configured as follows:

[0025] Acquire the current signal fed by the current sensor and the voltage signal, current signal and temperature signal of the battery fed by the battery sensor;

[0026] When at least one of the voltage signal, current signal and temperature signal of the battery fed by the battery sensor is not within a set threshold range, controlling to close the first relay;

[0027] When the current signal fed by the current sensor is at a set first threshold, controlling to open the second relay;

[0028] When the current signal fed by the current sensor is not at a set second threshold, the controller closes the second relay.

[0029] Furthermore, the first threshold value is 0±1A, and the second threshold value is the current range for normal operation of the power unit.

[0030] The beneficial effects of the utility model are:

[0031] When the elevator is operating normally, the coil generates electric energy through the movement of the permanent magnet, and the electric energy is stored by a battery. During the working process, the battery sensor is set to detect the signal parameters of the battery. When the battery is not operating normally, the first relay is closed and charging is stopped to avoid battery loss during the charging process and increase the service life of the battery. During the battery discharge process, the power supply current of the power unit is detected by the current sensor. When the current is not detected, the battery is controlled to discharge. During the discharge process, the power supply current is detected. If the current is too large or too small, it indicates that there is a fault in the battery discharge. At this time, the battery is controlled to stop discharging to protect the battery and the power unit. The utility model has the advantages of long service life and low failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The working circuit diagram of a power generation and power supply system utilizing elevator operation according to an embodiment of the utility model is shown.

[0033] Figure 2 A schematic diagram of the structure of a battery sensor in a system for generating electricity and supplying electricity using elevator operation according to an embodiment of the utility model is shown.

[0034] Reference numerals:

[0035] 1. Car; 2. Permanent magnet; 3. Coil; 4. AC / DC converter; 5. DC / DC converter; 6. First relay; 7. Second relay; 8. Battery; 9. Battery sensor; 901. Battery voltage sensor; 902. Battery current sensor; 903. Battery temperature sensor; 10. DC / AC converter; 11. Control unit; 12. Auxiliary battery; 13. Current sensor; 14. Traction machine. DETAILED DESCRIPTION

[0036] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0037] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The specific implementation of the utility model is further described in detail below in conjunction with the drawings and embodiments.

[0040] The utility model provides a power generation and power supply system using elevator operation, such as Figure 1 As shown, the power generation and power supply system utilizing elevator operation includes a car 1 and a power unit, wherein the power unit is connected to the car 1, and the car 1 is disposed in an elevator shaft (not shown in the figure).

[0041] In this embodiment, the power unit is selected as the traction machine 14, wherein the traction machine 14 is connected to the car 1 through a transmission component. The transmission component can adopt parts such as steel cables commonly used in current elevators to play the role of intermediate transmission. The utility model mainly improves the power source of the traction machine 14. The current elevator power supply scheme adopts a main power supply and a backup power supply. The main power supply is provided by the national power grid. When a power outage occurs, the backup power supply is started. A battery is added here in this embodiment. The battery is a device that supplies power to the traction machine 14 in the event of a power outage. Its priority is higher than the backup power supply of the elevator itself. When the battery energy is exhausted or fails, the backup power supply is started as the last guarantee. This can make the elevator safer and more convenient to provide people with a riding experience.

[0042] The system for generating and supplying electricity by utilizing elevator operation further includes a permanent magnet 2 , a coil 3 , a first relay 6 , a second relay 7 , a battery 8 , a current sensor 13 , a battery sensor 9 and a control unit 11 .

[0043] The permanent magnet 2 is fixed to the car 1, and the coil 3 is fixed on the side wall of the elevator shaft; the coil 3 is connected to the battery 8 circuit, and the first relay 6 is arranged on the connection circuit between the coil 3 and the battery 8; the battery 8 circuit is connected to the power supply circuit of the traction machine 14, and the second relay 7 is arranged on the connection circuit between the circuit and the power supply circuit of the traction machine 14; the current sensor is arranged on the power supply circuit of the traction machine 14, and the battery sensor 9 is electrically connected to the battery 8; the signal input ends of the battery sensor 9 and the current sensor 13 are both connected to the signal input end of the control unit 11, and the signal output end of the control unit 11 is connected to the signal output ends of the first relay 6 and the second relay 7.

[0044] In a specific implementation, the movement of the permanent magnet causes the coil to generate electrical energy, which is stored in a battery 8. During operation, a battery sensor 9 is set to detect the signal parameters of the battery, which are judged by the control unit 11. When the battery is not operating normally, the first relay 6 is controlled to be closed and charging is stopped to avoid battery loss during the charging process and increase the battery life. During the battery discharge process, the power supply current of the traction machine 14 is detected by the current sensor 13, which is judged by the control unit 11. When no current is detected, the battery 8 is controlled to discharge. During the discharge process, the power supply current is detected. If the current is too large or too small, it indicates that there is a fault in the battery discharge. At this time, the battery 8 is controlled to stop discharging to protect the battery 8 and the traction machine 14.

[0045] The workflow described above can be realized by automatic control of the control unit 11. Therefore, the control unit 11 is configured as follows:

[0046] Acquire the current signal fed by the current sensor and the voltage signal, current signal and temperature signal of the battery fed by the battery sensor;

[0047] When at least one of the voltage signal, current signal and temperature signal of the battery fed by the battery sensor is not within a set threshold range, controlling to close the first relay;

[0048] When the current signal fed by the current sensor is at a set first threshold, controlling to open the second relay;

[0049] When the current signal fed by the current sensor is not at a set second threshold, the controller closes the second relay.

[0050] The first threshold is 0±1A, and the second threshold is the current range for normal operation of the power unit.

[0051] In this embodiment, Figure 1 As shown, the connection line between the coil 3 and the battery 8 is provided with an AC / DC converter 4 and a DC / DC converter 5 in sequence, and the connection line between the battery 8 and the power supply line of the traction machine 14 is provided with a DC / AC converter 10. The AC / DC converter 4 is used to convert the alternating current generated by the coil 3 into direct current. The DC / DC converter 5 is used to adjust the direct current generated by the AC / DC converter 4 to a direct current of a set voltage value. The set voltage value is 380V.

[0052] In this embodiment, Figure 1 As shown, the system further includes an auxiliary battery 12 , which is electrically connected to the control unit 11 and is used to supply power to the control unit 11 .

[0053] For example, considering that the control unit 11 does not consume much energy, the capacity of the auxiliary battery 12 is usually not very large. For example, it can be a 6V battery, a 12V battery, or other types of battery. During daily operation, the auxiliary battery 12 is connected to the national power grid to maintain it in a fully charged state. When the power is off, the capacity of the auxiliary battery 12 should at least ensure that the working cycle of the control unit 11 is greater than the working cycle of the battery 8 in a fully charged state.

[0054] The control unit 11 described in this embodiment is an electronic component that can be purchased on the market and can perform data processing, such as various types of processing chips and the like.

[0055] In this embodiment, Figure 2 As shown, the battery sensor 9 includes a battery voltage sensor 901 , a battery current sensor 902 and a battery temperature sensor 903 , which are used to collect voltage signals, current signals and temperature signals of the battery 9 .

[0056] The specific working principle of the power generation and power supply system using elevator operation is as follows:

[0057] The coil 3 is fixed on the wall of the elevator shaft, and the permanent magnet 2 is fixed on the car 1. As the traction machine 14 lifts or lowers the car, the permanent magnet also moves up and down, and the coil cuts the magnetic flux lines to generate alternating current. The alternating current can be converted into direct current after passing through the AC / DC converter 4. After the direct current is processed by the DC / DC converter, the voltage can be adjusted to 380V direct current to charge the large-capacity battery 8. When the current sensor 13 detects that there is no current in the line supplying power to the traction machine, the control unit 11 controls the second relay 7 to close, and the large-capacity battery 8 starts to discharge. The 380V direct current can be converted into 380V alternating current to supply power to the traction machine through the DC / AC converter 10. The battery sensor 9 is responsible for monitoring the voltage, current, and temperature of the large-capacity battery 8. When charging is abnormal, the control unit 11 controls the first relay 6 to disconnect, and the first relay 6 can be closed only when the fault is removed. When discharging is abnormal, the control unit 11 controls the second relay 7 to disconnect, and the second relay 7 can be closed only when the fault is removed to continue discharging. The control unit 11 can control the first relay 6 and the second relay 7 according to the information fed back by the current sensor 13 and the battery sensor 9 to realize the closing and opening of the relays. The auxiliary battery 12 provides power to the control unit 11.

[0058] At the same time, a power sensor can also be configured in the battery sensor 9 to monitor the power of the battery 8. Based on the power of the battery 8, if the battery is fully charged, charging is stopped to avoid overcharging. When the battery is discharged, when the remaining power of the battery is lower than the discharge limit, discharging is stopped and the battery is switched to a charging state. When the battery is charging, the first relay 6 works and the second relay 7 does not work. When the battery is discharging, the second relay 7 works and the first relay 6 does not work. In this way, charging and discharging can be avoided, and the service life of the battery 8 can be improved.

[0059] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The scope of patent protection of the present invention should be limited by the claims.

Claims

1. A power generation and power supply system utilizing elevator operation, comprising a car and a power unit, wherein the power unit is connected to the car, and the car is arranged in an elevator shaft, characterized in that: Also includes a permanent magnet, a coil, a first relay, a second relay, a battery, a current sensor, a battery sensor and a control unit; The permanent magnet is fixed to the car, and the coil is fixed to the side wall of the elevator shaft; The coil is connected to the battery circuit, and the first relay is arranged on the connection circuit between the coil and the battery; The battery circuit is connected to the power supply circuit of the power unit, and the second relay is arranged on the connection circuit between the circuit and the power supply circuit of the power unit; The current sensor is arranged on the power supply line of the power unit, and the battery sensor is electrically connected to the battery; The signal input ends of the battery sensor and the current sensor are both connected to the signal input end of the control unit, and the signal output end of the control unit is connected to the signal output ends of the first relay and the second relay.

2. The system for generating and supplying electricity by using elevator operation as claimed in claim 1, characterized in that: The power unit includes a traction machine and a transmission assembly, and the traction machine is connected to the car through the transmission assembly.

3. The system for generating and supplying electricity by utilizing elevator operation as claimed in claim 1, characterized in that: An AC / DC converter and a DC / DC converter are sequentially arranged on the connection line between the coil and the battery, and a DC / AC converter is arranged on the connection line between the battery and the power supply line of the power unit.

4. The system for generating and supplying electricity by utilizing elevator operation as claimed in claim 3, characterized in that: The AC / DC converter is used to convert the alternating current generated by the coil into direct current.

5. The system for generating and supplying electricity by using elevator operation as claimed in claim 4, characterized in that: The DC / DC converter is used to adjust the direct current generated by the AC / DC converter to direct current with a set voltage value.

6. The system for generating and supplying electricity by using elevator operation as claimed in claim 5, characterized in that: The set voltage value is 380V.

7. The system for generating and supplying electricity by utilizing elevator operation as claimed in claim 1, characterized in that: It also includes an auxiliary battery, which is electrically connected to the control unit and is used to supply power to the control unit.

8. The system for generating and supplying electricity by utilizing elevator operation as claimed in claim 1, characterized in that: The battery sensor includes a battery voltage sensor, a battery current sensor and a battery temperature sensor, which are used to collect the voltage signal, current signal and temperature signal of the battery.

9. The system for generating and supplying electricity by utilizing elevator operation as claimed in claim 8, characterized in that: The control unit is configured to: Acquire the current signal fed by the current sensor and the voltage signal, current signal and temperature signal of the battery fed by the battery sensor; When at least one of the voltage signal, current signal and temperature signal of the battery fed by the battery sensor is not within the set threshold range, the first relay is controlled to be closed. When the current signal fed by the current sensor is at a set first threshold, controlling to open the second relay; When the current signal fed by the current sensor is not at a set second threshold, the controller closes the second relay.

10. The system for generating and supplying electricity by utilizing elevator operation as claimed in claim 9, characterized in that: The first threshold is 0±1A, and the second threshold is the current range for normal operation of the power unit.

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