CN219739973U - Frequency conversion energy-saving control circuit for elevator - Google Patents
Frequency conversion energy-saving control circuit for elevator Download PDFInfo
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- CN219739973U CN219739973U CN202222954348.7U CN202222954348U CN219739973U CN 219739973 U CN219739973 U CN 219739973U CN 202222954348 U CN202222954348 U CN 202222954348U CN 219739973 U CN219739973 U CN 219739973U
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Abstract
The utility model belongs to the technical field of elevators, and relates to a variable frequency energy-saving control circuit for an elevator, which comprises a frequency converter which is connected with a power grid in a three-wire way, wherein an output port of the frequency converter is connected with an elevator motor used for driving the elevator to work, the frequency converter is also connected with an energy feedback device in a conductive way, three R, S, T input ports of the energy feedback device are respectively connected with three phase wires of the power grid, and the three phase wires of the power grid are connected with an EMI filter. The utility model can adapt to the change of the running speed requirement of the elevator by utilizing the frequency converter, and can convert the direct current generated by the elevator into the alternating current energy matched with the power grid when in a power generation mode and feed the alternating current energy back to the power grid, thereby saving the power. The EMI filter can block high frequency interference signals from entering the device. Therefore, the interference signals can be prevented from impacting each electronic element in the control circuit, and the service life of the electronic element is prolonged.
Description
Technical Field
The utility model relates to the technical field of elevators, in particular to a frequency conversion energy-saving control circuit for an elevator.
Background
An elevator is a stationary lifting device mainly used in high-rise buildings. A vertical lift elevator is a vertical lift equipped with a car for use in a multi-story building to take persons or carry goods. In the vertical elevator, the lift car and the counterweight are hung on the chain wheel. When the counterweight is lighter than the total weight of the car and the car is required to be raised or the counterweight is heavier than the total weight of the car and the car is required to be lowered, the motor power is required to be provided by a power supply; when the weight is heavier than the total weight of the car and the car is required to ascend or the weight is lighter than the total weight of the car and the car is required to descend, power consumption is not required at this time, and even the motor can be used as a generator to output power. A control circuit is required to control the two different operating states.
It is therefore necessary to develop an energy-saving control circuit to fulfill the above needs.
Disclosure of Invention
The utility model mainly aims to provide a frequency conversion energy-saving control circuit for an elevator, which can save the energy consumption of the operation of the elevator.
The utility model realizes the aim through the following technical scheme: the utility model provides a frequency conversion energy-saving control circuit for elevator, includes the converter that carries out three-wire connection with the electric wire netting, the delivery outlet connection of converter is used for driving the elevator motor of elevator work, the converter still carries out conductive connection with an energy feedback device, R, S, T three input ports of energy feedback device connect respectively in three looks electric wire of electric wire netting, connect an EMI wave filter on the three looks electric wire of electric wire netting.
Specifically, an operation contactor is arranged on an electric wire between the frequency converter and the elevator motor.
Specifically, the housing of the frequency converter, the housing of the energy feedback device and the housing of the elevator motor are respectively grounded.
Specifically, three phase wires of the power grid are respectively connected with a plurality of energy feedback devices in parallel, and all the energy feedback devices are electrically connected with the frequency converter.
Further, the energy feedback device and the conductive wire of the frequency converter are provided with fuses.
Specifically, an ac reactor is further disposed on the three phase wires of the power grid, and the ac reactor is disposed on one side of the EMI filter, which is close to the power grid.
The technical scheme of the utility model has the beneficial effects that:
the utility model can adapt to the change of the running speed requirement of the elevator by utilizing the frequency converter, and can convert the direct current generated by the elevator into the alternating current energy matched with the power grid when in a power generation mode and feed the alternating current energy back to the power grid, thereby saving the power. The EMI filter can block high frequency interference signals from entering the device. Therefore, the interference signals can be prevented from impacting each electronic element in the control circuit, and the service life of the electronic element is prolonged.
Drawings
Fig. 1 is a circuit block diagram of a variable frequency energy saving control circuit for an elevator of embodiment 1;
fig. 2 is a circuit block diagram of a variable frequency energy saving control circuit for an elevator of embodiment 2;
fig. 3 is a circuit block diagram of a variable frequency energy saving control circuit for an elevator of embodiment 3.
The figures represent the numbers:
1-frequency converter, 2-elevator motor, 3-energy feedback device, 4-operation contactor, 5-heating wire, 6-fuse, 7-EMI wave filter, 8-alternating current reactor.
Detailed Description
The present utility model will be described in further detail with reference to specific examples.
Example 1:
as shown in fig. 1, the frequency conversion energy-saving control circuit for the elevator comprises a frequency converter 1 which is connected with a power grid in a three-wire mode, an output port of the frequency converter 1 is connected with an elevator motor 2 used for driving the elevator to work, the frequency converter 1 is also connected with an energy feedback device 3 in a conductive mode, and R, S, T input ports of the energy feedback device 3 are respectively connected with three phase wires of the power grid. The control circuit can change the control mode of the elevator from the original voltage-reducing starting mode of the resistor into a variable frequency (frequency modulation, voltage regulation and speed regulation) starting mode, and the speed reduction adopts a braking resistor consumption mode to be changed into a more energy-saving energy feedback mode. When the elevator motor 2 needs to work in a power-consuming mode, the electric power from the power grid can be transmitted to the elevator motor 2 through the frequency converter 1, so that the normal operation of the elevator can be maintained; when the elevator motor 2 is operating in a non-power consuming state, the elevator motor 2 can be used as a generator, and the generated power is fed back to the grid by means of the energy feedback device 3. Therefore, the utility model can adapt to the change of the running speed requirement of the elevator by utilizing the frequency converter 1, and can convert the direct current generated by the elevator into the alternating current energy matched with the power grid when in a power generation mode to feed back to the power grid, thereby saving the power. The lighting lamp, the fan and the like in the elevator can also supply power through the control circuit, so that the lighting lamp, the fan and other electric equipment are automatically turned off when the elevator is in an unmanned elevator.
As shown in fig. 1, an operation contactor 4 is provided on an electric wire between the inverter 1 and the elevator motor 2. When the elevator works normally, the control circuit needs to be switched on by the operation contactor 4; while the elevator is in an inactive state, the running contactor 4 is opened.
As shown in fig. 1, the housing of the inverter 1, the housing of the energy feedback device 3, and the housing of the elevator motor 2 are grounded, respectively. Thus, static electricity generated on the frequency converter 1, the energy feedback device 3 and the elevator motor 2 can be immediately led away through the ground, and the use safety is ensured.
As shown in fig. 1, the energy feedback device 3 and the conductive wire of the frequency converter 1 are provided with fuses 6. If the circuit fails, resulting in a sudden increase in current in the conductive wire, the fuse 6 will immediately blow and the energy feedback device 3 will not burn out.
Example 2:
as shown in fig. 2, the difference from embodiment 1 is that: the three phase wires of the power grid are respectively connected with two energy feedback devices 3 in parallel, and all the energy feedback devices 3 are electrically connected with the frequency converter 1. If the power of the elevator is relatively large, its power can be matched by increasing the number of energy feedback devices 3. The number of energy feedback devices 3 may be increased or decreased as desired.
As shown in fig. 2, the energy feedback device 3 and the conductive wire of the frequency converter 1 are provided with fuses 6. If the circuit fails, resulting in a sudden increase in current in the conductive wire, the fuse 6 will immediately blow and the energy feedback device 3 will not burn out.
As shown in fig. 2, an EMI filter 7 is connected to the three phase wires of the power grid. The EMI filter 7 functions to allow frequency signals during normal operation of the device to enter the device, blocking high frequency interfering signals from entering the device. Therefore, the interference signals can be prevented from impacting each electronic element in the control circuit, and the service life of the electronic element is prolonged.
Example 3:
as shown in fig. 3, the difference from embodiment 1 is that: an EMI filter 7 is connected to the three phase wires of the grid. The three phase wires of the power grid are also provided with an alternating current reactor 8, and the alternating current reactor 8 is arranged on one side of the EMI filter 7, which is close to the power grid. The alternating current reactor 8 is arranged at the input end of the frequency converter 1, can restrain the transmission of harmonic waves generated by the frequency converter 1 to the power grid, reduces the interference of the harmonic waves generated by the frequency converter 1 to other electrical equipment, limits the abnormal fluctuation of the power grid voltage and the impact current on the power grid, and reduces the influence of the abnormal fluctuation on the frequency converter. Such a filter with EMI 7 and ac reactor 8 may also be used in a control circuit with a plurality of energy feedback devices 3.
As shown in fig. 3, the energy feedback device 3 and the conductive wire of the frequency converter 1 are provided with fuses 6. If the circuit fails, resulting in a sudden increase in current in the conductive wire, the fuse 6 will immediately blow and the energy feedback device 3 will not burn out.
What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.
Claims (6)
1. A frequency conversion energy-saving control circuit for elevator, its characterized in that: the power supply system comprises a frequency converter which is in three-wire connection with a power grid, an output port of the frequency converter is connected with an elevator motor which is used for driving an elevator to work, the frequency converter is further in conductive connection with an energy feedback device, three R, S, T input ports of the energy feedback device are respectively connected with three phase wires of the power grid, and an EMI filter is arranged on the three phase wires of the power grid.
2. The variable frequency energy saving control circuit for an elevator according to claim 1, characterized in that: an operation contactor is arranged on an electric wire between the frequency converter and the elevator motor.
3. The variable frequency energy saving control circuit for an elevator according to claim 1, characterized in that: the housing of the frequency converter, the housing of the energy feedback device and the housing of the elevator motor are respectively grounded.
4. The variable frequency energy saving control circuit for an elevator according to claim 1, characterized in that: and three phase wires of the power grid are respectively connected with a plurality of energy feedback devices in parallel, and all the energy feedback devices are electrically connected with the frequency converter.
5. The variable frequency energy saving control circuit for an elevator according to claim 1 or 4, characterized in that: and fuses are arranged on the energy feedback device and the conductive wires of the frequency converter.
6. The variable frequency energy saving control circuit for an elevator according to claim 1, characterized in that: and an alternating current reactor is further arranged on the three-phase electric wires of the power grid, and the alternating current reactor is arranged on one side, close to the power grid, of the EMI filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222954348.7U CN219739973U (en) | 2022-11-07 | 2022-11-07 | Frequency conversion energy-saving control circuit for elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222954348.7U CN219739973U (en) | 2022-11-07 | 2022-11-07 | Frequency conversion energy-saving control circuit for elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219739973U true CN219739973U (en) | 2023-09-22 |
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ID=88063942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222954348.7U Active CN219739973U (en) | 2022-11-07 | 2022-11-07 | Frequency conversion energy-saving control circuit for elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219739973U (en) |
-
2022
- 2022-11-07 CN CN202222954348.7U patent/CN219739973U/en active Active
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