CN220190523U - Airport escalator power supply device - Google Patents
Airport escalator power supply device Download PDFInfo
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- CN220190523U CN220190523U CN202321753745.6U CN202321753745U CN220190523U CN 220190523 U CN220190523 U CN 220190523U CN 202321753745 U CN202321753745 U CN 202321753745U CN 220190523 U CN220190523 U CN 220190523U
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- 238000004146 energy storage Methods 0.000 claims abstract description 48
- 230000002457 bidirectional effect Effects 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 2
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model provides an airport escalator power supply device, which comprises a rectification circuit, a frequency converter, a motor, a controller and an energy storage unit, wherein the rectification circuit is connected with the frequency converter; wherein: the rectification circuits are respectively connected with a power grid and are used for outputting first direct current with rated voltage being a first voltage value by using first alternating current of the power grid; the frequency converter is connected with the rectifying circuit and is used for inverting the first direct current to output second alternating current and electrifying the motor; the controller is connected with the rectifying circuit and used for controlling the voltage of the first direct current to be constant at the first voltage value. The airport escalator power supply device can solve the technical problem that in the prior art, escalator equipment is easy to stop due to voltage sag.
Description
Technical Field
The utility model relates to the field of airport engineering, in particular to an airport escalator power supply device.
Background
With the rapid development of new electronic devices, the proportion of power electronic devices with good performance, high efficiency and sensitivity to power supply changes in airports is gradually increased, and the requirements of airports on dynamic power quality are continuously improved. This includes escalator devices driven by motors.
Voltage sag is a voltage disturbance commonly found in airport power distribution systems, and refers to a phenomenon that an effective value of a power supply voltage is suddenly reduced in a short time and then returns to a normal operation state. The Institute of Electrical and Electronics Engineers (IEEE) defines voltage sags as voltage drops of 90% to 10% of nominal values for 10ms to 1min.
Escalator equipment is prone to shutdown due to voltage sag. On one hand, the shutdown of the escalator can influence the actions of passengers and workers in an airport, so that the order is disordered; on the other hand, after the voltage is normal, the manual on-site reset is needed, the recovery speed is low, and the efficiency is low.
Disclosure of Invention
The utility model aims to provide an airport escalator power supply device, which solves the technical problem that in the prior art, escalator equipment is easy to stop due to voltage sag.
In order to achieve the above purpose, the utility model provides an airport escalator power supply device, which comprises a rectifying circuit, a frequency converter, a motor, a controller and an energy storage unit; wherein: the rectification circuits are respectively connected with a power grid and are used for outputting first direct current with rated voltage being a first voltage value by using first alternating current of the power grid; the frequency converter is connected with the rectifying circuit and is used for inverting the first direct current to output second alternating current and electrifying the motor; the controller is connected with the rectifying circuit and is used for controlling the voltage of the first direct current to be constant at the first voltage value; the energy storage unit is respectively connected with the rectifying circuit and the controller and is used for being electrified with the rectifying circuit and the frequency converter under the control of the controller.
Compared with the prior art, the utility model has the beneficial effects that:
according to the airport escalator power supply device, the energy storage unit is respectively connected with the rectifying circuit, the frequency converter and the controller, so that the airport escalator can be charged with the rectifying circuit and discharged to the frequency converter under the control of the controller, the fluctuation of electric energy of a power grid can be restrained, the power supply voltage is stabilized, the airport escalator has the voltage sag resistance, and the normal operation of the airport escalator under the abnormal power supply condition is ensured.
Preferably, the energy storage unit includes an energy storage battery.
Preferably, the rectifying circuit includes a rectifier and a DC/DC converter; the rectifier is connected with the power grid and is used for outputting second direct current with rated voltage being a second voltage value by using the first alternating current; the DC/DC converter is connected with the rectifier and is used for converting the second direct current into the first direct current.
Preferably, the controller includes a voltage monitoring unit for detecting a voltage value of the second direct current.
Preferably, the controller is connected to the DC/DC converter; when detecting that the voltage value of the second direct current changes to a first preset voltage interval, the controller is used for controlling the DC/DC converter to enable the rectifying circuit to charge the energy storage unit and supply power to the frequency converter, so that the voltage of the first direct current is constant at the first voltage value; when the voltage value of the second direct current is detected to be changed to a second preset voltage interval, the controller is used for locking the DC/DC converter and discharging the energy storage unit to the frequency converter, so that the voltage of the first direct current is constant at the first voltage value, and the second preset voltage interval is lower than the first preset voltage interval.
Preferably, the first preset voltage interval is 60-90% of the second voltage value.
Preferably, the second preset voltage interval is 10-59% of the second voltage value.
Preferably, the energy storage unit further comprises a bidirectional DC/DC converter, and the bidirectional DC/DC converter is respectively connected with the controller, the energy storage battery and the rectifying circuit; when detecting that the voltage value of the second direct current changes to a first preset voltage interval, the controller is used for controlling the rectifying circuit to supply power to the frequency converter and charge the energy storage unit through the bidirectional DC/DC converter, so that the voltage of the first direct current is constant at the first voltage value; when the voltage value of the second direct current changes to a second preset voltage interval, the controller is used for controlling the bidirectional DC/DC converter to enable the energy storage unit to discharge to the frequency converter, so that the voltage of the first direct current is constant at the first voltage value.
Preferably, the controller further comprises an electric quantity monitoring unit for monitoring the electric quantity state of the energy storage unit; and when the electric quantity state of the energy storage unit reaches a preset value, the controller controls the rectifying circuit to stop charging the energy storage unit.
Drawings
For a clearer description of embodiments of the present utility model, a brief description will be given of the drawings required for the embodiments, it being apparent that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic structural view of an airport escalator power supply device according to the present utility model.
In the figure: the motor comprises a frequency converter 1, a motor 2, a controller 3, an energy storage battery 41, a bidirectional DC/DC converter 42, a rectifier 51 and a DC/DC converter 52.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Fig. 1 is a schematic structural view of an airport escalator power supply device according to the present utility model. As shown in fig. 1, the embodiment discloses an airport escalator power supply device, which comprises a rectifying circuit, a frequency converter 1, a motor 2, a controller 3 and an energy storage unit.
The rectification circuits are respectively connected with a power grid and are used for outputting first direct current with rated voltage being a first voltage value by using first alternating current of the power grid.
Specifically, the rectifying circuit includes a rectifier 51 and a DC/DC converter 52; the rectifier 51 is connected to the power grid and is configured to output a second direct current with a rated voltage being a second voltage value by using the first alternating current; the DC/DC converter 52 is connected to the rectifier 51 for converting the second direct current to the first direct current. In some possible embodiments, the rectifier 51 is a three-phase bridge uncontrolled rectifier.
The frequency converter 1 is connected with the rectifying circuit and is used for inverting the first direct current to output second alternating current and electrifying the motor 2, and the motor 2 drives the escalator to work by utilizing the stable and controllable second alternating current.
The controller 3 is connected with the rectifying circuit and is used for controlling the voltage of the first direct current to be constant at the first voltage value.
Specifically, the controller 3 includes a voltage monitoring unit for detecting a voltage value of the second direct current.
The energy storage unit is respectively connected with the rectifying circuit and the controller 3 and is used for being electrified with the rectifying circuit and the frequency converter 1 under the control of the controller 3.
Specifically, the controller 3 is connected to the DC/DC converter 52; when detecting that the voltage value of the second direct current changes to a first preset voltage interval, the controller 3 is configured to control the DC/DC converter 52 to charge the rectifying circuit to the energy storage unit and supply power to the frequency converter 1, so that the voltage of the first direct current is constant at the first voltage value; when detecting that the voltage value of the second direct current changes to a second preset voltage interval, the controller 3 is configured to block the DC/DC converter 52 and control the bidirectional DC/DC converter 42 to discharge the energy storage unit to the frequency converter 1, so that the voltage of the first direct current is constant at the first voltage value. The second preset voltage interval is lower than the first preset voltage interval, that is, all voltage values in the second preset voltage interval are smaller than the minimum voltage value in the first preset voltage interval.
In some possible embodiments, the first preset voltage interval is 60-90% of the second voltage value; the second preset voltage interval is 10-59% of the second voltage value.
Specifically, the energy storage unit further includes a bidirectional DC/DC converter 42, and the bidirectional DC/DC converter 42 is connected to the controller 3, the energy storage battery 41, and the rectifying circuit, respectively; when detecting that the voltage value of the second direct current changes to a first preset voltage interval, the controller 3 is configured to control the rectifying circuit to supply power to the frequency converter 1 and charge the energy storage unit through the bidirectional DC/DC converter 42, so that the voltage of the first direct current is constant at the first voltage value; when the voltage value of the second direct current changes to a second preset voltage interval, the controller 3 is configured to control the bidirectional DC/DC converter 42 to discharge the energy storage unit to the frequency converter, so that the voltage of the first direct current is constant at the first voltage value.
Specifically, the controller 3 further includes an electric quantity monitoring unit for monitoring an electric quantity state of the energy storage unit; when the state of charge of the energy storage unit reaches a preset value, the controller 3 controls the rectifying circuit to stop charging the energy storage unit.
The working principle of the utility model is described below with reference to the examples:
as shown in fig. 1, when the power grid supplies power normally, the phase a, phase B and phase C are rectified by the rectifier 51 to obtain a direct current voltage U DC1 Is 515V; then the controller 3 controls the DC/DC converter 52 to convert U DC1 Conversion to a stable DC bus voltage U DC2 Is 750V rated. U (U) DC2 On one hand, the three-phase alternating currents u, v and w which are stable and controllable are obtained after inversion of the frequency converter 1 and are used for controlling the motor 2 to drive the escalator to work; u (U) DC2 On the other hand, the energy storage battery 41 is charged through the bidirectional DC/DC converter 42, and meanwhile, the controller monitors the electric quantity state of the energy storage battery 41 until the residual electric quantity reaches 90% of the maximum electric quantity of the energy storage battery 41, and the charging is stopped. The operating energy of the escalator comes from the power grid at this time.
When the voltage of the power grid is reduced, the effective value of the power supply voltage is reduced to the rated valueFrom 60 to 90% of (3), the controller 3 detects U due to the output characteristic of the rectifier 51 DC1 The voltage drops to 60-90% of the rated value 515V, and the controller 3 controls the DC/DC converter 52 to maintain the DC bus voltage U DC2 Maintained at 750V. U (U) DC2 On one hand, three-phase alternating currents u, v and w are obtained after inversion by the frequency converter 1 and are used for controlling the motor 2 to drive the escalator to work; u (U) DC2 On the other hand, the energy storage battery 41 is charged through the bidirectional DC/DC converter 42, and meanwhile, the controller 3 monitors the state of charge of the energy storage battery 41 until the residual electric quantity reaches 90% of the maximum electric quantity of the energy storage battery 41, and the charging is stopped. The operating energy of the escalator comes from the power grid at this time.
When the grid voltage sags, the supply voltage effective value drops to 10-59% of the rated value, and the controller 3 detects U due to the output characteristic of the rectifier 51 DC1 When the voltage drops to 10-59% of the rated value 515V, the controller 3 closes the DC/DC converter 52, and controls the bidirectional DC/DC converter 42 to discharge the energy storage battery 41 to the inverter 1, thereby maintaining the DC bus voltage U DC2 Maintained at 750V. U (U) DC2 Three-phase alternating currents u, v and w are obtained after inversion of the motor frequency converter 1 and are used for controlling the motor 2 to drive the escalator to work. The operating energy of the escalator comes from the power grid and the energy storage battery 41 at this time.
The airport escalator power supply device can inhibit power fluctuation of a power grid, stabilize power supply voltage, enable the airport escalator to have voltage sag resistance, and ensure normal operation of the airport escalator under abnormal power supply conditions.
The foregoing description of various embodiments of the utility model has been presented to those skilled in the art for the purposes of illustration. It is not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. As described above, various alternatives and variations of the present utility model will be apparent to those skilled in the art. Thus, while some alternative embodiments have been specifically discussed, other embodiments will be apparent or relatively readily available to those skilled in the art. The present utility model is intended to embrace all alternatives, modifications and variations of the present utility model that have been discussed herein and other embodiments that fall within the spirit and scope of the above-described application.
While the present utility model has been described by way of embodiments, those of ordinary skill in the art will recognize that there are many variations and modifications of the present utility model without departing from the spirit of the utility model, and it is intended that the appended claims encompass such variations and modifications as do not depart from the spirit of the utility model.
Claims (9)
1. The airport escalator power supply device is characterized by comprising a rectifying circuit, a frequency converter, a motor, a controller and an energy storage unit; wherein:
the rectification circuits are respectively connected with a power grid and are used for outputting first direct current with rated voltage being a first voltage value by using first alternating current of the power grid;
the frequency converter is connected with the rectifying circuit and is used for inverting the first direct current to output second alternating current and electrifying the motor;
the controller is connected with the rectifying circuit and is used for controlling the voltage of the first direct current to be constant at the first voltage value;
the energy storage unit is respectively connected with the rectifying circuit and the controller and is used for being electrified with the rectifying circuit and the frequency converter under the control of the controller.
2. The airport escalator power supply of claim 1, wherein the energy storage unit comprises an energy storage battery.
3. The airport escalator power supply of claim 2, wherein the rectifying circuit comprises a rectifier and a DC/DC converter; the rectifier is connected with the power grid and is used for outputting second direct current with rated voltage being a second voltage value by using the first alternating current; the DC/DC converter is connected with the rectifier and is used for converting the second direct current into the first direct current.
4. An airport escalator power supply according to claim 3, wherein the controller comprises a voltage monitoring unit for detecting the voltage value of the second direct current.
5. The airport escalator power supply of claim 4, wherein said controller is connected to said DC/DC converter; when detecting that the voltage value of the second direct current changes to a first preset voltage interval, the controller is used for controlling the DC/DC converter to enable the rectifying circuit to charge the energy storage unit and supply power to the frequency converter, so that the voltage of the first direct current is constant at the first voltage value; when the voltage value of the second direct current is detected to be changed to a second preset voltage interval, the controller is used for locking the DC/DC converter and discharging the energy storage unit to the frequency converter, so that the voltage of the first direct current is constant at the first voltage value, and the second preset voltage interval is lower than the first preset voltage interval.
6. The airport escalator power supply of claim 5, wherein said first predetermined voltage interval is 60-90% of said second voltage value.
7. The airport escalator power supply of claim 5, wherein said second predetermined voltage interval is 10-59% of said second voltage value.
8. The airport escalator power supply of claim 5, wherein said energy storage unit further comprises a bi-directional DC/DC converter, said bi-directional DC/DC converter being connected to said controller, said energy storage battery, and said rectifying circuit, respectively; when detecting that the voltage value of the second direct current changes to a first preset voltage interval, the controller is used for controlling the rectifying circuit to supply power to the frequency converter and charge the energy storage unit through the bidirectional DC/DC converter, so that the voltage of the first direct current is constant at the first voltage value; when the voltage value of the second direct current changes to a second preset voltage interval, the controller is used for controlling the bidirectional DC/DC converter to enable the energy storage unit to discharge to the frequency converter, so that the voltage of the first direct current is constant at the first voltage value.
9. The airport escalator power supply of any one of claims 1-8, wherein said controller further comprises a power monitoring unit for monitoring a power status of said energy storage unit; and when the electric quantity state of the energy storage unit reaches a preset value, the controller controls the rectifying circuit to stop charging the energy storage unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321753745.6U CN220190523U (en) | 2023-07-05 | 2023-07-05 | Airport escalator power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321753745.6U CN220190523U (en) | 2023-07-05 | 2023-07-05 | Airport escalator power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220190523U true CN220190523U (en) | 2023-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321753745.6U Active CN220190523U (en) | 2023-07-05 | 2023-07-05 | Airport escalator power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220190523U (en) |
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- 2023-07-05 CN CN202321753745.6U patent/CN220190523U/en active Active
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