CN112366919A - Power supply control system of construction elevator - Google Patents
Power supply control system of construction elevator Download PDFInfo
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- CN112366919A CN112366919A CN202011265528.3A CN202011265528A CN112366919A CN 112366919 A CN112366919 A CN 112366919A CN 202011265528 A CN202011265528 A CN 202011265528A CN 112366919 A CN112366919 A CN 112366919A
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Abstract
The invention discloses a power supply control system of a construction elevator, which judges whether the residual electric energy of an energy storage device reaches the full amount of electricity by detecting the residual electric energy of the energy storage device in real time, controls a small power generation device to stop working if the residual electric energy of the energy storage device reaches the full amount of electricity, controls a charge and discharge control circuit to break a circuit connected with the small power generation device and controls the circuit connected with the energy storage device to be conducted, so that the energy storage device supplies power to meet the uplink power supply requirement of the construction elevator, controls the small power generation device to keep working if the residual electric energy value does not reach the full amount of electricity, controls the charge and discharge control circuit to break the circuit connected with the energy storage device and controls the circuit connected with the small power generation device to be kept connected, the small power generation device continuously supplies power, improves the continuous working time of the energy storage device, and reduces the starting, the situation that the service life of the small power generation device is rapidly reduced or faults occur due to frequent starting is prevented.
Description
Technical Field
The invention relates to the field of elevators, in particular to a power supply control system of a construction elevator.
Background
The construction elevator is a large energy consumption part in building construction and is indispensable in building construction. At present, the construction elevator is connected to an external network to perform functions, starting current is large when the construction elevator is started, large potential energy exists in a descending process, mechanical impact is large when the construction elevator is stopped at every time, the potential energy is wasted and causes mechanical damage, the construction elevator utilizes the potential energy of the construction elevator to drag a motor to operate when the construction elevator descends, and power consumption at the moment is very small. And the actual operation of the construction elevator is mostly light load or even no-load operation, the energy efficiency is low, the electric quantity of an external network is greatly consumed, the energy waste is caused, and the construction elevator is not economical and environment-friendly. In addition, after the potential energy of the construction elevator is utilized, how to intelligently control the power supply mode of the construction elevator to ensure the construction safety is a problem to be solved urgently in the next step.
Disclosure of Invention
The invention aims to provide a power supply control system of a construction elevator so as to realize intelligent power supply control of the construction elevator.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a power supply control system of a construction elevator comprises a guide rail, a suspension cage, a motor unit and a small power generation device, wherein the suspension cage is assembled on the guide rail, the construction elevator further comprises the motor unit which is used for driving the suspension cage to move upwards on the guide rail, the output end of the motor unit is connected with and drives the suspension cage to move upwards on the guide rail, the motor unit is connected with the energy storage device which is used for storing renewable energy generated by the fact that the suspension cage moves downwards and the potential energy drives the motor unit to passively operate and the small power generation device which is used for providing auxiliary operation energy for the motor unit, the energy storage device and the small power generation device are both connected to a charge and discharge control circuit, and the charge and discharge control circuit is connected with the motor unit through a frequency converter;
the power supply control system of the construction elevator includes:
the residual electric quantity detection device is used for detecting the residual electric quantity of the energy storage device;
the processor is used for comparing the detection value of the residual electric quantity detection device with a preset threshold value;
and the controller is used for controlling the working states of the small power generation device and the charging and discharging control circuit according to the comparison result of the processor.
Further, the processor is used for comparing the detection value of the residual electric quantity detection device with a high threshold value, wherein the high threshold value refers to a full-rated electric quantity value of the energy storage device, and the controller is used for controlling the small power generation device to stop working and controlling the charge-discharge control circuit to disconnect a line connected with the small power generation device and control a line connected with the energy storage device to be conducted when the processor judges that the electric quantity of the energy storage device reaches the full-rated electric quantity value, so that the energy storage device supplies power to meet the uplink power supply requirement of the construction elevator; otherwise, the controller controls the small power generation device to keep working, controls the charging and discharging control circuit to disconnect a line connected with the energy storage device, controls the line connected with the small power generation device to keep communicating, and is continuously supplied with power by the small power generation device.
Further, the processor is further used for comparing a detection value of the residual electric quantity detection device with a low threshold value, wherein the low threshold value can meet an electric quantity value required by the construction hoist to go up for one time under the condition of rated load, when the processor compares that the current residual electric quantity of the energy storage device is smaller than the low threshold value, the controller controls the small power generation device to start working, controls the charging and discharging control circuit to disconnect a circuit connected with the energy storage device and control the circuit connected with the small power generation device to be communicated, and the small power generation device supplies power to meet the uplink power supply requirement of the construction hoist, and the controller controls the energy storage device to be switched to supply power until the electric quantity of the energy storage device reaches a full-rated electric quantity value.
Further, the power supply control system of the construction elevator further includes:
the power generation monitoring device is used for monitoring the working state of the small power generation device and feeding the working state back to the controller, the power generation monitoring device is respectively connected with the small power generation device and the controller,
the controller is also used for controlling the small power generation device to be in emergency shutdown when the small power generation device breaks down, simultaneously controlling the charge-discharge control circuit to disconnect a line connected with the small power generation device, controlling the line connected with the energy storage device to be conducted, and temporarily supplying power by the energy storage device so as to temporarily meet the uplink power supply requirement of the construction elevator.
Further, the power supply control system of the construction elevator further includes:
and the alarm device is connected with the controller, and the controller is also used for controlling the alarm device to give an alarm prompt when the small power generation device breaks down.
Furthermore, the alarm device gives an alarm prompt in a manner of lighting alarm and/or sound alarm.
Further, the energy storage device is a storage battery or a super capacitor.
Further, the small power generation device is at least one of a solar power generator, a wind power generator and a hydroelectric generator.
Furthermore, the frequency converter comprises a rectifying unit and an inverting unit, wherein the rectifying unit is connected to the inverting unit through a direct current bus.
Further, the guide rail and the suspension cage are combined to form a complete device,
the complete set of devices is provided with a plurality of groups,
the sets of the complete equipment are respectively provided with the respective motor sets,
and each motor unit is connected in parallel to the same charge and discharge control circuit through the frequency converter.
The invention has the following beneficial effects:
according to the construction elevator, the electric damage caused by starting current is solved through the frequency converter of the frequency conversion and speed regulation part of the construction elevator, potential energy generated when the construction elevator goes down or decelerates is converted into electric energy, and the regenerated energy (converted electric energy) is recycled and stored through the energy storage equipment so as to be conveniently used by the construction elevator in an uplink mode, so that the potential energy is well converted; mechanical impact in the descending process can be relieved due to conversion and consumption of potential energy; the first cage movement of the construction elevator is completed through the stored energy of the small power generation device and the energy storage equipment, the auxiliary energy is provided for the follow-up cage movement, the energy consumption of the cage movement is almost ignored, the power supply of the construction elevator is not required to be connected into a power grid, and the normal operation of the construction elevator can be met, so that the energy is saved, and the energy-saving and environment-friendly effects are achieved.
The power supply control system of the construction elevator judges whether the residual electric energy of the energy storage device reaches the full-rated electric quantity or not by detecting the residual electric quantity of the energy storage device in real time, if so, the small power generation device is controlled to stop working, meanwhile, the charge and discharge control circuit is controlled to disconnect a circuit connected with the small power generation device and control the circuit connected with the energy storage device to be conducted, so that the energy storage device supplies power to meet the uplink power supply requirement of the construction elevator, and if not, the small power generation device is controlled to keep working, the charge and discharge control circuit is controlled to disconnect the circuit connected with the energy storage device and control the circuit connected with the small power generation device to be communicated, and the small power generation device continuously supplies power. Whether the electric quantity of the energy storage device reaches the full-scale electric quantity or not is judged, if the electric quantity of the energy storage device reaches the full-scale electric quantity, the energy storage device is controlled to supply power, otherwise, the small-sized power generation device is controlled to supply power, the intelligent power supply control of the construction elevator is realized, the continuous working time of the energy storage device is prolonged, the starting times of the small-sized power generation device are reduced, and the situation that the service life of the small-sized power generation device is rapidly reduced or faults occur due to frequent starting is prevented. And whether the current residual capacity of the energy storage device is smaller than a low threshold value or not is evaluated, if so, the energy storage device cannot meet the requirement that the construction hoist completes one ascending action under the condition of rated load, at the moment, the controller controls the small power generation device to start working, controls the charge-discharge control circuit to disconnect a circuit connected with the energy storage device and control the circuit connected with the small power generation device to be communicated, and the small power generation device supplies power to meet the ascending power supply requirement of the construction hoist.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of a construction hoist according to a preferred embodiment of the present invention;
fig. 2 is an electrical configuration diagram of a construction elevator according to a preferred embodiment of the present invention.
Fig. 3 is a schematic block configuration diagram of a power supply control system of a construction elevator according to another embodiment of the present invention.
Fig. 4 is a flowchart illustrating a power supply control method of a construction elevator according to another embodiment of the present invention.
Illustration of the drawings:
1. a guide rail; 2. a suspension cage; 3. a motor unit; 4. an energy storage device; 5. a small-sized power generation device; 6. a charge and discharge control circuit; 7. and a frequency converter.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered.
As shown in fig. 1 and fig. 2, the construction hoist of this embodiment, including guide rail 1 and cage 2, cage 2 assembles on guide rail 1, construction hoist is still including being used for driving cage 2 to move upward on guide rail 1 motor unit 3, the output of motor unit 3 is connected and is driven cage 2 to move upward on guide rail 1, motor unit 3 even has energy storage device 4 that is used for storing the downstream potential energy of cage 2 motion down-process and drives the produced renewable energy of motor unit 3 passive operation and is used for providing the small-size power generation facility 5 of auxiliary operating energy for motor unit 3, energy storage device 4 and small-size power generation facility 5 all connect on charge-discharge control circuit 6, charge-discharge control circuit 6 passes through converter 7 and connects motor unit 3. The potential energy generated when the construction elevator goes down or decelerates is converted into electric energy, and the regenerated energy (converted electric energy) is recycled and stored through the energy storage equipment so as to be conveniently used by the construction elevator in an ascending way, thereby well converting the potential energy; mechanical impact in the descending process can be relieved due to conversion and consumption of potential energy; the stored energy through small-size power generation facility 5 and energy memory 4 accomplishes construction elevator's the first cage 2 motion and goes upward and provide auxiliary energy for follow-up cage 2 motion, and the energy consumption that cage 2 moved down is neglected almost, can satisfy construction elevator's normal operating, need not to insert the power supply that the electric wire netting carried out construction elevator to the consumption of the energy saving, not only energy-conservation but also environmental protection.
In this embodiment, the motor unit 3 includes a permanent magnet synchronous motor and a single-pole gear reducer, an output end of the permanent magnet synchronous motor is connected to an input end of the single-pole gear reducer, and an output end of the single-pole gear reducer is connected to and drives the cage 2 to travel on the guide rail 1. The efficiency of an asynchronous motor used by the existing construction elevator is generally about 75%, the power design of the construction elevator is designed by the full-load operation of the construction elevator, however, the actual operation of the construction elevator is mostly light-load or even no-load operation, and the efficiency of the asynchronous motor is lower. The permanent magnet synchronous motor special for the construction elevator is adopted to replace an asynchronous motor used by the existing construction elevator, an air gap magnetic field of the permanent magnet synchronous motor is provided by a permanent magnet, exciting current is not needed, so the power factor is high, a rotor magnetic field is provided by the permanent magnet during synchronous operation, the rotor has no copper loss and high iron loss efficiency, the efficiency of the permanent magnet synchronous motor is generally over 90 percent, and the permanent magnet synchronous motor has high efficiency during light-load and no-load operation of the construction elevator due to the linear load characteristic. The currently adopted worm gear speed reducer is improved into a gear speed reducer, so that the efficiency of the speed reducer is effectively improved, the gear speed reducer adopts single-pole transmission, the efficiency is over 97 percent, and the efficiency of the worm gear speed reducer is only about 75 percent; then, after the transmission efficiency of the reducer is changed, the power requirement of the construction elevator cage 2 can be reduced by about 22%. Because the construction elevator adopts the single-pole transmission gear reducer and the permanent magnet synchronous motor, the energy conversion rate is improved, and not only is less electric energy consumed when the construction elevator ascends under the condition of the same load, but also more electric energy converted from potential energy is consumed when the construction elevator descends. The construction elevator can normally run under the drive of a 20kw motor, the potential energy of the construction elevator is converted into electric energy when the construction elevator runs downwards, the transmission efficiency of the single-stage gear reducer is 97%, the efficiency of the permanent magnet synchronous motor is 90%, and the energy conversion efficiency is about 80% and actually about 70% according to theoretical calculation.
In this embodiment, the energy storage device 4 is a storage battery or a super capacitor. The construction elevator is structurally designed by adopting a self-powered construction elevator, a storage battery or a super capacitor is adopted as an energy storage device 4, electric energy converted from potential energy when the construction elevator descends and electric energy generated by a small power generation device 5 are stored for the construction elevator to ascend, so that the construction elevator can maintain the same height of ascending and descending by self power generation on the premise of rated load, the additional electric energy is required to be about 30 percent and 6kw of rated power, the construction elevator only consumes power when ascending, the ascending of the construction elevator only occupies 50 percent of the total operation time of the construction elevator, and the actual operation time of the construction elevator always occupies about 50 percent of the working period of the construction elevator when the construction elevator operates to the upper stop position and the lower stop position, and as can be known, in order to maintain the normal operation of the construction elevator, the construction elevator can maintain the construction elevator by supplementing 25 percent of the additional electric energy which is additionally required by 1.5kw when the construction elevator operates to the construction elevator The elevator operates normally, so that the small-sized power generation device 5 can supply power to the construction elevator. The small power generation device 5 of the self-powered construction hoist only needs 1.5kw of capacity, so that the construction hoist which does not need a power supply provided by a power grid can be completely satisfied by wind energy or solar energy. It can be understood that the suspension cage 2 moves downwards to drive the motor unit 3 to operate passively, the motor unit 3 is further connected with a generator, and the motor unit 3 drives the generator to rotate, so that the potential energy generated by the downward movement of the suspension cage 2 is converted into electric energy, and the generated electric energy is transmitted to the energy storage device 4 to be stored.
In this embodiment, the guide rail 1 and the suspension cage 2 are combined to form a complete device, the complete device is provided with a plurality of sets, each set of the complete device is provided with a respective motor unit 3, and each motor unit 3 is connected in parallel to the same charge and discharge control circuit 6 through a frequency converter 7.
In this embodiment, the guide rail 1 and the suspension cage 2 are combined to form a complete device, a plurality of sets of motor sets 3 are arranged on one set of complete device, and the plurality of sets of motor sets 3 and a plurality of sets of frequency converters 7 corresponding to the motor sets 3 are connected in parallel and then are connected to the charge and discharge control circuit 6.
In this embodiment, the energy storage device 4 has a dc conversion circuit for voltage conversion and a voltage detection circuit for detecting voltage, and the energy storage device 4 is connected to the charge and discharge control circuit 6 through the dc conversion circuit and the voltage detection circuit.
In this embodiment, the small power generator 5 is at least one of a solar power generator, a wind power generator, and a hydroelectric power generator.
In this embodiment, the voltage detection circuit includes a resistor and a variable resistor.
In this embodiment, the frequency converter 7 includes a rectifying unit and an inverting unit, and the rectifying unit is connected to the inverting unit through a dc bus.
In this embodiment, the charge/discharge control circuit 6 includes a charge control circuit, a discharge control circuit, and a voltage detection circuit.
In this embodiment, the upper and lower portions of the cage 2 are each formed in a truncated cone shape for reducing air resistance.
During implementation, potential energy generated when the construction elevator descends or decelerates is converted into electric energy through a frequency converter 7 of a frequency conversion and speed regulation part of the construction elevator, and the regenerated energy is recycled and stored through a storage battery or a super capacitor so as to be conveniently used upwards by the construction elevator, and the power of all motors of the construction elevator can be reduced by the light weight design of a suspension cage 2 of the construction elevator and the transmission efficiency of a speed reducer, and the electric energy utilization rate can be improved by improving the efficiency of the motors; finally, the construction elevator can meet the normal operation of the construction elevator only through the small power generation device 5 on the premise of no power grid power supply.
In addition, as shown in fig. 3, another embodiment of the present invention further provides a power supply control system for a construction elevator, which is used for performing power supply control on the construction elevator. Specifically, the power supply control system of the construction elevator includes:
a remaining power detection device for detecting the remaining power of the energy storage device 4;
the processor is used for comparing the detection value of the residual electric quantity detection device with a preset threshold value;
and the controller is used for controlling the working states of the small-sized power generation device 5 and the charging and discharging control circuit 6 according to the comparison result of the processor. The processor is respectively connected with the residual electric quantity detection device and the controller, and the controller is also connected with the small-sized power generation device 5 and the charging and discharging control circuit 6.
The specific way of detecting the remaining power belongs to the mature technology, and is not described herein again.
The processor is used for comparing a detection value of the residual electric quantity detection device with a high threshold value, wherein the high threshold value refers to a full-rated electric quantity value of the energy storage device 4, the controller is used for controlling the small power generation device 5 to stop working when the processor judges that the electric quantity of the energy storage device 4 reaches the full-rated electric quantity value, controlling the charging and discharging control circuit 6 to disconnect a circuit connected with the small power generation device 5 and control a circuit connected with the energy storage device 4 to be conducted, and the energy storage device 4 supplies power to meet the uplink power supply requirement of the construction elevator; otherwise, the small-sized power generation device 5 is controlled to keep working, the charging and discharging control circuit 6 is controlled to disconnect the line connected with the energy storage device 4, the line connected with the small-sized power generation device 5 is controlled to keep connecting, and the small-sized power generation device 5 continuously supplies power. Through judging whether the electric quantity of energy memory 4 reaches full-scale electric quantity, if reach then control and supply power by energy memory 4, otherwise then control and supply power by small-size power generation facility 5, promoted energy memory 4's continuous operation time, reduced small-size power generation facility 5's the number of times of starting, prevent that small-size power generation facility 5 from leading to life to descend fast or the condition of breaking down because frequently starting.
In addition, when the processor compares that the current remaining capacity of the energy storage device 4 is smaller than a low threshold, wherein the low threshold refers to a capacity value which can meet the requirement of the construction hoist for going up once under the condition of rated load, that is, the energy storage device 4 cannot meet the requirement of the construction hoist for completing an upward movement under the condition of the rated load, at this time, the controller controls the small power generation device 5 to start working, controls the charge and discharge control circuit 6 to disconnect a line connected with the energy storage device 4, controls the line connected with the small power generation device 5 to be communicated, and supplies power by the small power generation device 5 so as to meet the upward power supply requirement of the construction hoist. And after the electric quantity of the energy storage device 4 is detected to reach the full-rated electric quantity value, the controller controls to switch to the energy storage device 4 to supply power, so that the situation that the construction hoist stops rising midway in the ascending process due to insufficient electric quantity of the energy storage device 4 is prevented.
The power supply control system of the construction elevator judges whether the residual electric energy of the energy storage device 4 reaches the full-rated electric quantity or not by detecting the residual electric quantity of the energy storage device 4 in real time, if so, the small-sized power generation device 5 is controlled to stop working, meanwhile, the charging and discharging control circuit 6 is controlled to disconnect a circuit connected with the small-sized power generation device 5 and control the circuit connected with the energy storage device 4 to be conducted, so that the energy storage device 4 supplies power to meet the uplink power supply requirement of the construction elevator, if not, the small-sized power generation device 5 is controlled to keep working, the charging and discharging control circuit 6 is controlled to disconnect the circuit connected with the energy storage device 4 and control the circuit connected with the small-sized power generation device 5 to be kept connected, and the small-sized power generation device 5 continuously supplies power. Through judging whether the electric quantity of energy memory 4 reaches full-scale electric quantity, if reach then control and supply power by energy memory 4, otherwise then control and supply power by small-size power generation facility 5, promoted energy memory 4's continuous operation time, reduced small-size power generation facility 5's the number of times of starting, prevent that small-size power generation facility 5 from leading to life to descend fast or the condition of breaking down because frequently starting. And whether the current residual capacity of the energy storage device 4 is smaller than a low threshold value or not is evaluated, if so, the situation means that the energy storage device 4 cannot meet the requirement that the construction hoist completes one ascending action under the condition of rated load, at the moment, the controller controls the small power generation device 5 to start working, controls the charging and discharging control circuit 6 to disconnect a circuit connected with the energy storage device 4, controls the circuit connected with the small power generation device 5 to be communicated, and supplies power through the small power generation device 5 so as to meet the ascending power supply requirement of the construction hoist, and controls the controller to switch to the energy storage device 4 to supply power until the electric quantity of the energy storage device 4 is detected to reach a full electric quantity value, so that the situation that the construction hoist stops ascending halfway in the ascending process due to insufficient electric quantity of the energy storage device 4 is prevented.
It is to be understood that, as preferable, the power supply control system of the construction elevator further includes:
the power generation monitoring device is used for monitoring the working state of the small power generation device 5 and feeding the working state back to the controller, the power generation monitoring device is respectively connected with the small power generation device 5 and the controller,
the controller is also used for controlling the small power generation device 5 to be in emergency shutdown when the small power generation device fails, simultaneously controlling the charging and discharging control circuit 6 to be disconnected with a circuit connected with the small power generation device 5, controlling the circuit connected with the energy storage device 4 to be conducted, and temporarily supplying power by the energy storage device 4 so as to temporarily meet the uplink power supply requirement of the construction elevator.
It is to be understood that, as preferable, the power supply control system of the construction elevator further includes:
and the alarm device is connected with the controller and used for sending out alarm prompt when the small power generation device 5 breaks down. The manner of sending the alarm reminder includes, but is not limited to, an audio alarm and a light alarm.
When the small-size power generation facility 5 breaks down suddenly, send the warning and remind when control is supplied power by energy memory 4 temporarily, because if energy memory 4's residual electric quantity is also not enough when, can't support construction elevator and go upward to the target location, still probably shut down midway, consequently, take corresponding measure to remedy through sending the warning with the warning staff, prevent to take place serious incident.
It is to be understood that, as shown in fig. 4, another embodiment of the present invention also provides a power supply control method of a construction elevator, which is applicable to the power supply control system of the above-described embodiment, the method including the steps of:
step S1: detecting the residual capacity of the energy storage device 4;
step S2: comparing the detection value with a preset threshold value, wherein the preset threshold value comprises a low threshold value and a high threshold value, the high threshold value refers to a full-rated electric quantity value of the energy storage device 4, and the low threshold value refers to an electric quantity value required by the construction elevator to go up once under the condition of rated load;
step S3: and controlling the working states of the small-sized power generation device 5 and the charge and discharge control circuit 6 according to the comparison result.
It is understood that the specific manner of detecting the remaining power in the step S1 is well-known and will not be described herein again.
In addition, the step S3 specifically includes: when the current residual capacity of the energy storage device 4 reaches the high threshold value through comparison in the step S2, controlling the small power generation device 5 to stop working, controlling the charge and discharge control circuit 6 to disconnect the line connected with the small power generation device 5, controlling the line connected with the energy storage device 4 to be conducted, and supplying power by the energy storage device 4 to meet the uplink power supply requirement of the construction hoist; otherwise, the small-sized power generation device 5 is controlled to keep working, the charging and discharging control circuit 6 is controlled to disconnect the line connected with the energy storage device 4, the line connected with the small-sized power generation device 5 is controlled to keep connecting, and the small-sized power generation device 5 continuously supplies power. Through judging whether the electric quantity of energy memory 4 reaches full-scale electric quantity, if reach then control and supply power by energy memory 4, otherwise then control and supply power by small-size power generation facility 5, promoted energy memory 4's continuous operation time, reduced small-size power generation facility 5's the number of times of starting, prevent that small-size power generation facility 5 from leading to life to descend fast or the condition of breaking down because frequently starting.
In addition, the step S3 further includes the following steps: when the current remaining capacity of the energy storage device 4 is smaller than the low threshold value through comparison in the step S2, the small power generation device 5 is controlled to start working, the charge and discharge control circuit 6 is controlled to disconnect a line connected with the energy storage device 4, the line connected with the small power generation device 5 is controlled to be communicated, the small power generation device 5 supplies power to meet the uplink power supply requirement of the construction hoist, and the power is controlled to be switched to the energy storage device 4 to supply power until the electric capacity of the energy storage device 4 reaches the full electric capacity value. The situation that the construction hoist stops rising midway in the ascending process due to insufficient electric quantity of the energy storage device 4 is prevented.
It can be understood that the power supply control method of the construction hoist of the invention judges whether the residual electric energy of the energy storage device 4 reaches the full amount of electric energy by detecting the residual electric energy of the energy storage device 4 in real time, if so, the small-sized power generation device 5 is controlled to stop working, meanwhile, the charging and discharging control circuit 6 is controlled to disconnect the circuit connected with the small-sized power generation device 5 and control the circuit connected with the energy storage device 4 to be conducted, so that the energy storage device 4 supplies power to meet the uplink power supply requirement of the construction hoist, if not, the small-sized power generation device 5 is controlled to keep working, the charging and discharging control circuit 6 is controlled to disconnect the circuit connected with the energy storage device 4 and control the circuit connected with the small-sized power generation device 5 to be kept connected, and the small-sized power generation device 5 continuously supplies power. Through judging whether the electric quantity of energy memory 4 reaches full-scale electric quantity, if reach then control and supply power by energy memory 4, otherwise then control and supply power by small-size power generation facility 5, promoted energy memory 4's continuous operation time, reduced small-size power generation facility 5's the number of times of starting, prevent that small-size power generation facility 5 from leading to life to descend fast or the condition of breaking down because frequently starting. And whether the current residual capacity of the energy storage device 4 is smaller than a low threshold value or not is evaluated, if so, the energy storage device 4 cannot meet the requirement that the construction hoist completes one ascending action under the condition of rated load, at the moment, the small power generation device 5 is controlled to start working, the charging and discharging control circuit 6 is controlled to disconnect a circuit connected with the energy storage device 4, the circuit connected with the small power generation device 5 is controlled to be communicated, the small power generation device 5 supplies power to meet the ascending power supply requirement of the construction hoist, and the energy storage device 4 is controlled to be switched to supply power until the electric quantity of the energy storage device 4 reaches a full electric quantity value, so that the situation that the construction hoist stops ascending halfway in the ascending process due to insufficient electric quantity of the energy storage device 4 is prevented.
It is understood that, as a preferable mode, the power supply control method of the construction elevator further includes the steps of:
step S4: the working state of the small power generation device 5 is monitored, if the small power generation device 5 is monitored to be in fault, the small power generation device is controlled to be in emergency shutdown, meanwhile, the charging and discharging control circuit 6 is controlled to be disconnected from a circuit connected with the small power generation device 5, the circuit connected with the energy storage device 4 is controlled to be conducted, and the energy storage device 4 supplies power temporarily to meet the uplink power supply requirement of the construction elevator temporarily.
It is understood that, as a preferable mode, the power supply control method of the construction elevator further includes the steps of:
step S5: and sending out an alarm prompt. The manner of sending the alarm reminder includes, but is not limited to, an audio alarm and a light alarm.
When the small-size power generation facility 5 breaks down suddenly, send the warning and remind when control is supplied power by energy memory 4 temporarily, because if energy memory 4's residual electric quantity is also not enough when, can't support construction elevator and go upward to the target location, still probably shut down midway, consequently, take corresponding measure to remedy through sending the warning with the warning staff, prevent to take place serious incident.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A power supply control system of a construction elevator is characterized in that the construction elevator comprises a guide rail (1) and a suspension cage (2), the suspension cage (2) is assembled on the guide rail (1), the construction elevator further comprises a motor unit (3) used for driving the suspension cage (2) to move upwards on the guide rail (1), the output end of the motor unit (3) is connected with and drives the suspension cage (2) to move upwards on the guide rail (1), the motor unit (3) is connected with an energy storage device (4) used for storing renewable energy generated by the passive operation of the motor unit (3) driven by descending potential energy in the descending process of the movement of the suspension cage (2) and a small power generation device (5) used for providing auxiliary operation energy for the motor unit (3), and the energy storage device (4) and the small power generation device (5) are both connected to a charge-discharge control circuit (6), the charge and discharge control circuit (6) is connected with the motor unit (3) through a frequency converter (7);
the power supply control system of the construction elevator includes:
the residual electric quantity detection device is used for detecting the residual electric quantity of the energy storage device (4);
the processor is used for comparing the detection value of the residual electric quantity detection device with a preset threshold value;
and the controller is used for controlling the working states of the small power generation device (5) and the charging and discharging control circuit (6) according to the comparison result of the processor.
2. The power supply control system of a construction elevator according to claim 1,
the processor is used for comparing a detection value of the residual electric quantity detection device with a high threshold value, wherein the high threshold value refers to a full-rated electric quantity value of the energy storage device (4), the controller is used for controlling the small power generation device (5) to stop working when the processor judges that the electric quantity of the energy storage device (4) reaches the full-rated electric quantity value, controlling the charging and discharging control circuit (6) to disconnect a circuit connected with the small power generation device (5) and control a circuit connected with the energy storage device (4) to be conducted, and the energy storage device (4) supplies power to meet the uplink power supply requirement of the construction elevator; otherwise, the controller controls the small power generation device (5) to keep working, controls the charging and discharging control circuit (6) to disconnect the line connected with the energy storage device (4), controls the line connected with the small power generation device (5) to keep connected, and continuously supplies power by the small power generation device (5).
3. The power supply control system of a construction elevator according to claim 2,
the processor is further used for comparing a detection value of the residual electric quantity detection device with a low threshold value, wherein the low threshold value refers to an electric quantity value which can meet the requirement that the construction hoist moves up once under the condition of rated load, when the processor compares that the current residual electric quantity of the energy storage device (4) is smaller than the low threshold value, the controller controls the small power generation device (5) to start working and controls the charge-discharge control circuit (6) to disconnect a circuit connected with the energy storage device (4) and control the circuit connected with the small power generation device (5) to be communicated, the small power generation device (5) supplies power to meet the uplink power supply requirement of the construction hoist, and the controller controls the energy storage device (4) to be switched to supply power until the electric quantity of the energy storage device (4) reaches the full-capacity electric quantity value.
4. The power supply control system of a construction elevator according to claim 1,
the power supply control system of the construction elevator further includes:
the power generation monitoring device is used for monitoring the working state of the small power generation device (5) and feeding the working state back to the controller, the power generation monitoring device is respectively connected with the small power generation device (5) and the controller,
the controller is also used for controlling the small power generation device (5) to be in emergency shutdown when the small power generation device fails, simultaneously controlling the charging and discharging control circuit (6) to disconnect a line connected with the small power generation device (5), controlling the line connected with the energy storage device (4) to be conducted, and temporarily supplying power by the energy storage device (4) so as to temporarily meet the uplink power supply requirement of the construction elevator.
5. The power supply control system of a construction elevator according to claim 4,
the power supply control system of the construction elevator further includes:
and the alarm device is connected with the controller, and the controller is also used for controlling the alarm device to give an alarm prompt when the small power generation device (5) breaks down.
6. The power supply control system of a construction elevator according to claim 5,
the alarm device sends out alarm reminding in a mode of light alarm and/or sound alarm.
7. The power supply control system of a construction elevator according to claim 1,
the energy storage device (4) is a storage battery or a super capacitor.
8. The power supply control system of a construction elevator according to claim 1,
the small power generation device (5) is at least one of a solar power generator, a wind power generator and a hydroelectric generator.
9. The power supply control system of a construction elevator according to claim 1,
the frequency converter (7) comprises a rectifying unit and an inverting unit, and the rectifying unit is connected to the inverting unit through a direct current bus.
10. The power supply control system of a construction elevator according to claim 1,
the guide rail (1) and the suspension cage (2) are combined to form a complete device,
the complete set of devices is provided with a plurality of groups,
the sets of devices are respectively provided with the respective motor sets (3),
and each motor unit (3) is connected in parallel to the same charge and discharge control circuit (6) through the frequency converter (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265528.3A CN112366919A (en) | 2020-11-13 | 2020-11-13 | Power supply control system of construction elevator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265528.3A CN112366919A (en) | 2020-11-13 | 2020-11-13 | Power supply control system of construction elevator |
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| CN112366919A true CN112366919A (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011265528.3A Withdrawn CN112366919A (en) | 2020-11-13 | 2020-11-13 | Power supply control system of construction elevator |
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| CN (1) | CN112366919A (en) |
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- 2020-11-13 CN CN202011265528.3A patent/CN112366919A/en not_active Withdrawn
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