CN107591864B - Elevator energy recovery system based on intelligent super capacitor module - Google Patents
Elevator energy recovery system based on intelligent super capacitor module Download PDFInfo
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Abstract
The invention discloses an elevator energy recovery system based on an intelligent super capacitor module, which comprises a plurality of connected super capacitor modules, wherein the super capacitor modules are connected with a CAN communication bus and are connected with a system control main board through the CAN communication bus; the super capacitor module is connected with the direct current contactor through the IGBT, the driving inductor and the power inductor, and is also connected with the elevator controller; the super capacitor module is also connected with the single-phase inversion module and outputs 220VAC. The system control main board is respectively connected with a display module, an IGBT, a driving inductor and a power inductor, and a direct current contactor; the elevator controller is connected with the direct current contactor, and the elevator controller is also connected with an elevator input switch, and the elevator input switch is connected with a 380VAC input power supply through a three-phase contactor. The invention can use more elevator users to approve the elevator energy recovery system, and promote the popularization of the elevator energy recovery system to a certain extent.
Description
Technical Field
The invention relates to an elevator energy recovery device, in particular to an elevator energy recovery system taking an intelligent super capacitor module as an energy storage unit.
Background
With the continuous development of elevator technology and energy-saving technology, an elevator energy recovery system has appeared in the elevator field in recent years, and has a main function of recovering electric energy converted from potential energy of an elevator when the elevator is in a power generation state and reutilizing the recovered electric energy when the elevator is in a power consumption state. In the current elevator energy recovery system industry, super capacitors are used as energy storage devices, and the single capacity and the serial number of the super capacitors adopted by different power of the elevator energy recovery system are different.
In the existing elevator energy recovery system in the market, the super capacitor module is a common module which is adopted, namely, the super capacitor module only has a single overvoltage discharge protection circuit. The common module mode has great potential safety hazard in an elevator energy recovery system. The super capacitor is used as a large-energy storage device, and the withstand voltage rating of the super capacitor per se is only 2.7V, but the super capacitor can bear up to hundreds of kiloamperes. The application of the super capacitor in the elevator energy recovery system utilizes the high-current charge and discharge characteristics, when the elevator is in a power generation state, the bus voltage is raised to be more than 700V by the voltage generated by the elevator traction motor, but the highest storage voltage of the super capacitor energy storage unit used in the elevator energy recovery system is 150-200V, when the elevator is in the power generation state, the elevator energy recovery system charges the super capacitor with the voltage of up to 700V and above through the BUCK step-down circuit, the system stores the power generation energy in the super capacitor within the limited time of power generation of the elevator, the average value of the charging current is up to tens of amperes, and the peak current is up to hundreds of amperes. However, the equalizing current of the overvoltage protection circuit in the common super capacitor module is only 1-5A, and when the voltage of part of super capacitor monomers in the module reaches 2.65V, the protection circuit corresponding to the super capacitor monomers starts to work, and the excess electric quantity is discharged, so that the voltage of the super capacitor monomers is ensured to be limited within 2.7V. However, if the charging current is far greater than the discharging current of the protection circuit, the common charging current may charge the single body voltage of the super capacitor to more than 2.7V, which may reduce the service life of the super capacitor module, and when the charging current is too great, the explosion-proof valve of the super capacitor may be opened, which may cause the single body leakage of the super capacitor to be damaged or even explode.
In the elevator energy recovery system, the total capacity of the super capacitor modules equipped by the system is different due to different loads of the elevators corresponding to the actual elevator, namely different powers of the traction motors of the elevators. Therefore, in practical engineering, the super capacitor modules provided in the elevator energy recovery system may be a series-parallel combination of a plurality of super capacitor modules in different manners. Under the condition, due to the consistency problem of the super capacitor monomer and the consistency problem of the super capacitor sub-module, the super capacitor monomer or sub-module with poor consistency is damaged too early, and in actual engineering, the elevator energy recovery system is maintained by an elevator maintenance person, but the general elevator maintenance person does not know the novel energy storage element of the super capacitor. Therefore, in general, if the super capacitor energy storage unit is damaged, the whole super capacitor module is completely replaced, which causes resource waste in actual engineering, and the disposal of the replaced super capacitor module is also a pollution to natural environment.
The protection scheme of the super capacitor monomer protection circuit in the existing elevator energy recovery system is that when the voltage of the super capacitor monomer is higher than 2.65V, a resistor is adopted to discharge the super capacitor monomer, and redundant electric quantity of the super capacitor monomer is converted into heat and dissipated to a natural space. In fact, the super capacitor overvoltage protection scheme also causes a certain thermal pollution to natural space, and the highest efficiency limit of the elevator energy recovery system on electric quantity recovery is also limited by the method. Because some of the recovered electrical energy must be converted into heat by the supercapacitor cell protection circuit.
According to the above situation, how does the super capacitor module be most efficiently utilized in an elevator energy recovery system? How to ensure that the service life of the super capacitor monomer and sub-module reaches the due service life of the super capacitor? How does the matching combination of supercapacitors in an elevator energy recovery system be more flexible and intelligent? How to make the working state and life state of the super capacitor and the module more intuitively shown, and make the elevator maintenance personnel more easily know the conditions of the super capacitor and the module? How can the resource waste and natural environmental pollution caused by system maintenance be reduced? And so on, are all problems that we should consider and solve in the study of the elevator energy recovery system.
Disclosure of Invention
Aiming at the existing problems and technical bottlenecks in the elevator energy recovery system, the intelligent super-capacitor module is researched to realize free serial-parallel combination of multiple modules, automatically allocate the IP addresses of the hardware of the module, realize an energy moving type balancing mode between the super-capacitor monomer and the sub-module, ensure that the balancing current of the module can automatically adapt to high-current charge and discharge, improve the utilization rate of the super-capacitor and protect the service life of the super-capacitor. And the automatic communication between the main board of the elevator energy recovery system and the super capacitor energy storage unit is realized by basically providing a special communication mode between the main board and the intelligent super capacitor energy recovery system and the existing elevator energy recovery system, various main parameters of each monomer or sub-module of the super capacitor energy storage unit are collected in real time, the main parameters of the super capacitor are displayed on a system display through a specific number sub-algorithm of the main board of the system, a real-time man-machine interaction function is realized, and the main parameters are provided for elevator maintenance personnel as the basis of system maintenance and repair.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
An elevator energy recovery system based on an intelligent super capacitor module comprises a plurality of connected super capacitor modules, wherein the super capacitor modules are connected with a CAN communication bus and are connected with a system control main board through the CAN communication bus; the super capacitor module is connected with the direct current contactor through the IGBT, the driving inductor and the power inductor, and is also connected with the elevator controller; the super capacitor module is also connected with the single-phase inversion module and outputs 220VAC.
The system control main board is respectively connected with a display module, an IGBT, a driving inductor and a power inductor, and a direct current contactor;
The elevator controller is connected with the direct current contactor, and the elevator controller is also connected with an elevator input switch, and the elevator input switch is connected with a 380VAC input power supply through a three-phase contactor.
An elevator energy recovery system based on an intelligent supercapacitor module comprises a supercapacitor monomer voltage detection circuit, a supercapacitor monomer primary protection circuit, a supercapacitor monomer grouping type secondary transformer type energy movement active equalization circuit, a supercapacitor grouping voltage detection circuit, a supercapacitor grouping PWM waveform generation circuit, an intelligent module on-board switch power supply, a module singlechip circuit, a module hardware IP address automatic distribution circuit, a module CAN communication circuit, an LED indication circuit, a module active equalization power supply input circuit, a 220V inversion module, a wide voltage range system power supply, an IGBT driving module, an LED digital display module, The system comprises a BUCK/BOOST conversion inductor, a main board DSP control system, a main board CAN communication module, a main board voltage detection system, a current detection system, a power supply self-locking system, an auxiliary power supply output control system, an input three-phase contactor, a 24V direct current bus control contactor, a high-power IGBT module, an input/output and energy storage connection air switch and a system switch. The super capacitor single body voltage detection circuit detects the voltage between the anode and the cathode of the super capacitor single body in real time; the primary protection circuit of the super capacitor monomer discharges the corresponding super capacitor monomer with small current of 1-2A when the voltage detection circuit of the super capacitor monomer detects that the voltage of the super capacitor monomer is higher than 2.65V, and the primary protection circuit is a buffer protection mode when the small current is charged or the super capacitor is slightly over-voltage, and can protect the working reliability of a system main board once without pulse current; the super capacitor single body grouping type secondary transformer type energy moving active equalization circuit has the advantages that after the super capacitor single body primary protection circuit works, when the charging current is still more than 2A, the secondary energy moving active equalization circuit isolates and regulates the 24V direct current voltage sent by the elevator energy recovery system main board and then charges super capacitor groups with the lowest voltage, the purpose of reducing the voltage difference among the groups is achieved, meanwhile, the secondary equalization current can reach more than 10A, and because an electromagnetic conversion mode of a transformer is adopted, the loss is low compared with an equalization mode of resistance discharge, and meanwhile, the purpose of improving the energy recovery efficiency of the elevator is achieved; the super capacitor grouping voltage detection circuit is used for detecting the total voltage of each grouping in real time, and sending a voltage signal to the module singlechip circuit for digital signal processing, and the voltage signal is used as a logic basis for the work of the secondary equalization circuit; the super capacitor grouping PWM waveform generation circuit is used for generating 30KHz complementary PWM waves to drive MOS tubes in the super capacitor single grouping type secondary transformer type energy transfer equalization circuit, so that switching control is realized; the intelligent module on-board switching power supply has the function of isolating and converting the 12V direct-current voltage sent by the elevator energy recovery system main board into working voltage required by each sub-module circuit on the module and providing the working voltage for each sub-module circuit on the super capacitor module; the module singlechip circuit is used for realizing digital signal processing and controlling the logic operation of each sub-module circuit according to element logic; the module hardware IP address automatic allocation circuit is used for automatically allocating an IP address to each super capacitor module in the system by adopting a hardware logic combination mode of a signal input/output interface, and sending the IP address to an IO port pin of a single machine in a parallel digital signal mode to serve as a communication address of the super capacitor module in the whole system; the module CAN communication circuit adopts an isolated CAN2.0B communication mode to realize the bidirectional communication between each super capacitor module and between the super capacitor module and the elevator energy recovery system main board; the LED indication circuit has the function of indicating the working states of each super capacitor single protection circuit and each super capacitor single grouping secondary protection circuit of the current module in a simple mode of an LED lamp, and is convenient for system debugging and circuit maintenance; the module active balancing power supply input circuit receives 24V direct current voltage sent by the elevator energy recovery system main board, and carries out EMC treatment on the power supply again to prevent power supply interference between the super capacitor module and the system main board; the 220V inversion emergency module inverts the direct-current voltage of the intelligent super capacitor module into 220V alternating-current voltage for the elevator system to serve as low-voltage power supply in the elevator control cabinet; the system power supply with the wide voltage range adopts a switching power supply mode, and the input voltage range can reach 70V-200V. The IGBT driving module consists of a bootstrap power supply and a driving circuit, and is matched with a BUCK/BOOST conversion inductor to realize the voltage increasing and decreasing function. The LED nixie tube display module consists of an LED digital display screen, a stabilized voltage supply, a singlechip, a communication circuit and a digital driving circuit and is responsible for information display of a system. The BUCK/BOOST conversion inductor is wound by a high-power EE magnetic core and a plurality of enamelled wires, so that the BUCK-BOOST energy conversion is realized. The DSP control system adopts a TMS320F28335 digital signal processing chip to realize signal processing and various control of each unit of the main board. And the main board CAN communication module is used for realizing digital communication between the main board and the display module as well as between the main board and the intelligent super capacitor module energy storage module. The voltage detection system adopts a linear optocoupler isolation technology to realize accurate detection of the system bus and super capacitor voltage, and sends the voltage to the DSP for digital signal processing. The current detection system is used for realizing current detection during BUCK/BOOST voltage conversion, judging the charge and discharge states and sending the charge and discharge states to the DSP for signal processing. The power supply self-locking system is controlled by the DSP to lock the power supply after the system is started and simultaneously supplies power by an external power supply and an internal intelligent super capacitor module, so that the system can continue to normally work after the power grid is in power failure, and the system power supply when an elevator is in emergency leveling is realized. And when the system is started, the auxiliary power supply output control system cuts off the power supply of each external sub-module, ensures the smooth starting of the power supply of the main board system, and after the power supply of the main board of the system is started and all circuits on the main board of the system work stably, the DSP sends a control signal to control the relay to switch on the power supply of each sub-module.
Preferably, the super capacitor monomer used in the intelligent super capacitor module is 600F or 3000F super capacitor monomer.
Preferably, the super capacitor single voltage detection circuit adopts a TL431 reference voltage chip, and has low cost and quick circuit response.
Preferably, the super capacitor single-stage protection circuit adopts a mode of discharging an MOS tube and a power resistor, and has low cost and high circuit working reliability.
Preferably, the super capacitor single-body grouping type secondary transformer type energy moving active equalization circuit adopts a push-pull switch transformer as an electromagnetic conversion device, and has high working efficiency and large output current.
Preferably, the super capacitor grouping PWM waveform generation circuit adopts an EG3525 chip, the integration level is high, and the circuit works reliably.
As the optimization, the module singlechip circuit adopts an MCS08DZ60 singlechip, and is provided with a CAN communication module and an ADC module, so that the integration level is high, and the chip stability is good.
Preferably, the module hardware IP address automatic allocation circuit communicates with the hardware mode of the input/output cascade mode of the interface, when the modules are cascade connected in series and parallel, the module automatically allocates different hardware IP addresses to the module according to the cascade sequence.
Preferably, the module CAN communication circuit adopts an isolation mode to supply power, so that digital communication among modules of different voltage platforms is realized.
Preferably, the module active equalization power input circuit is designed with a power EMC processing circuit to prevent power interference between the intelligent super capacitor module and the elevator energy recovery system main board.
Preferably, the 220V inversion module directly inverts and isolates the direct-current voltage of the intelligent super capacitor module energy storage unit and then sends the direct-current voltage to the elevator control cabinet through the alternating-current contactor.
Preferably, the input voltage range of the wide voltage range system power supply is designed to be in the range of 70-200V of direct current.
Preferably, the BUCK/BOOST conversion inductor is wound by a high-power EE magnetic core and a plurality of enamelled wires.
Preferably, the main board DSP control system adopts a TMS320F28335 digital signal processing chip, and the chip adopts a 4-stage pipeline mode, so that the operation speed is high and the reliability is high.
Preferably, the motherboard voltage detection system adopts a linear optocoupler detection mode, so that the cost is low, and the circuit is safe and reliable.
Compared with the prior art, the invention has the advantages that: on the one hand, the super capacitor module adopted by the existing elevator energy recovery system is a common super capacitor module, the function is single, the equalizing circuit only equalizes the voltage of the super capacitor monomer, the equalizing mode is a resistance discharging mode, the equalizing current is only 1-5A, the super capacitor module should be in the elevator energy recovery system, because the equalizing current is only 1-5A, but the charging current can reach tens of amperes or even hundreds of amperes when the elevator is in a power generation state, and when the super capacitor monomer is full, the equalizing current and the charging current are too large in phase difference, so the effect of the phase equalizing circuit is not obvious. The equalization mode of the common super capacitor module adopts a resistor to convert electric quantity into heat energy to be directly released into natural space, so that under the condition, the efficiency of an elevator energy recovery system is limited, the capacity of the super capacitor module is not utilized to the maximum, and heat generated during equalization is also heat pollution to the natural environment. On the other hand, the common super capacitor module adopted by the existing elevator energy recovery system is not provided with a module signal acquisition and communication system, and under the condition, after the system is put into use, the system cannot judge the working state and the performance condition of the super capacitor module. When the super capacitor is damaged in the long-term use process, the problem of consistency of the super capacitor monomer usually causes that a certain super capacitor monomer is damaged prematurely, but general elevator maintenance personnel basically do not know the physical properties of the super capacitor, and the elevator energy recovery system does not have the functions of checking and judging the states and the performances of the super capacitor module and the monomer, and can not provide any useful reference information for the elevator maintenance personnel, so in practical projects, after the super capacitor module is damaged, the maintenance personnel replace the whole super capacitor module completely, and the replaced super capacitor module is usually scrapped after being returned to a factory. The processing result causes great resource waste, simultaneously increases the use cost of users, reduces the recovery efficiency of the user cost, increases the investment risk of the users, and is a real problem that the current elevator energy recovery system is difficult to popularize. Meanwhile, the scrapping treatment of the bad modules also causes a certain pollution to the natural environment. The invention mainly aims at the practical problems existing in the existing elevator energy recovery system, specially provides the research and development problems and realizes the technical implementation, and meanwhile, the invention is applied to the implementation project in detail, and achieves better effects. In the invention, a two-stage equalization means is adopted in the energy storage unit of the super capacitor module, the first stage is a resistance discharge type super capacitor single equalization circuit which is the same as a common super capacitor module, but the single equalization current is designed to be smaller in the invention, because the effect is not the equalization concept in the common module, the effect is to perform certain buffering equalization effect on the pulse voltage reflected by the pulse current on the super capacitor, rather than equalization on the stable voltage, thus the overall heating condition of the super capacitor module is greatly reduced compared with the common super capacitor, and the loss of the recovered electric quantity is also greatly reduced, the capacity utilization rate of the super capacitor module is relatively improved. Meanwhile, a certain super capacitor in the super capacitor module is used as a group, the whole super capacitor module is divided into a plurality of groups, and energy moving type active equalization of a transformer mode is adopted for each group, the principle of the equalization mode is that the transformer is adopted to realize electromagnetic energy conversion to move the voltage of the group with high voltage to the voltage of the group with low voltage, the loss of the transformer mode is very low and can be almost ignored compared with the common equalization mode, so that the utilization rate of the super capacitor capacity and the energy recovery efficiency of an elevator are further improved in the system. Meanwhile, the invention adopts a hardware mode to automatically combine all sub-modules to allocate IP addresses in the super-capacitor module, in the practical project, the energy storage units of the elevator energy recovery system are all used by combining a plurality of super-capacitor sub-modules in series and in parallel, when the sub-modules are used in cascade, each super-capacitor module adopts the hardware mode to automatically allocate a located IP address to the elevator energy recovery system according to the cascade condition, thus the elevator energy recovery system main board can send information with the own IP address in system communication, and can identify all information of each sub-module through the IP address and process correct digital signals. In the invention, the real-time state and performance of each super capacitor sub-module are converted into digital information through a singlechip and an auxiliary circuit in a module circuit, the digital information is processed and then transmitted to a system main board through a communication line, the system main board displays the information on an LED digital display to realize man-machine interaction after performing digital processing according to system logic again, and the information is provided for users and elevator maintenance personnel as reference and maintenance basis. By integrating the advantages of the invention, more elevator users can be used to acknowledge the elevator energy recovery system, and the popularization of the elevator energy recovery system is promoted to a certain extent.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
FIG. 2 is a block diagram of an intelligent supercapacitor module;
fig. 3 is a schematic diagram of a transformer equalization module circuit.
Detailed Description
The present invention will be described in further detail below in order to make the objects, technical solutions and advantages of the present invention more apparent.
Referring to fig. 1 (system component block diagram), an elevator energy recovery system based on an intelligent super capacitor module includes: the intelligent super capacitor module, the 220V inversion module, the wide voltage range system power supply, the IGBT driving module, the LED digital display module, the BUCK/BOOST conversion inductor, the main board DSP control system, the main board CAN communication module, the main board voltage detection system, the current detection system, the power self-locking system, the auxiliary power supply output control system, the three-phase contactor, the 24V direct current bus control contactor and the high-power IGBT module. The three-phase contactor is an input end of a system power supply, wherein 380V alternating current voltage of two phases is connected to a control coil of the three-phase contactor, when the power grid supplies power normally, the three-phase contactor is attracted, a normally open contact is closed, and the three-phase power of the power grid is supplied to an elevator controller. When the system works normally, after the power grid fails, 220V alternating current output by the working of the inversion module is transmitted to a low-voltage circuit of the elevator control cabinet to supply power through an external isolation transformer or a breaker, so that the control part of the elevator control cabinet can work normally. The direct-current voltage reduction circuit is used for converting direct-current high voltage on the direct-current bus into direct-current voltage of 350V and providing the direct-current voltage to the inverter module. The inverter module has the function that when a power grid fails, the system main board is used for controlling the BOOST of the BOOST, the direct current bus voltage is reduced again and then inverted into 220V alternating current voltage, and the 220V alternating current voltage is provided for a low-voltage electricity utilization unit of the elevator controller; the intelligent super capacitor module is formed by connecting 500F or 3000F super capacitor monomers in series, and the energy recovery storage function is realized. The IGBT is used for realizing switch control in BUCK and BOOST circuits. The IGBT driving circuit is composed of a bootstrap power supply and an isolated driving chip and has the function of receiving PWM signal control sent by a system main board, so that the effective driving of the IGBTs in the BUCK and BOOST circuits is realized; the power conversion inductor mainly realizes electromagnetic conversion of BUCK and BOOST circuits, is formed by winding a high-power EE magnetic core and a plurality of enamelled wires, and has good high-frequency characteristic and high conversion efficiency; the display module adopts an LED digital display, and has the function of displaying all main parameters of the system on the LED digital display in a digital mode, so that a device user or an operator can know the real-time working state of the system. The CAN communication module is used for realizing digital communication between the system main board and the intelligent super capacitor module and mutually transmitting various real-time parameters of the super capacitor.
The intelligent super capacitor module of the invention mainly comprises the following components in combination with the attached figure 2 (the intelligent super capacitor module forms a block diagram): the system comprises a power circuit, a super capacitor monomer equalizing circuit, a super capacitor grouping equalizing circuit, a singlechip digital signal processing circuit, a voltage acquisition circuit, a temperature acquisition circuit, a CAN communication circuit and a hardware IP address automatic allocation circuit. The power supply circuit is used for supplying power to each unit circuit on the intelligent super capacitor module; the super capacitor monomer consists of 500F or 3000F super capacitor monomers; the super capacitor monomer equalizing circuit has the function that when the voltage of the corresponding super capacitor is charged to more than 2.7V, the circuit consumes redundant electric quantity by adopting a discharge resistor, so that the service life of the super capacitor monomer is protected to a certain extent; the super capacitor grouping equalization circuit adopts a transformer equalization mode, and high-efficiency electric quantity of a high-voltage sub-unit is moved to a low-voltage group through a transformer in an electromagnetic conversion mode; the singlechip digital signal processing circuit adopts an MC9S12DJ64 chip as a processor core, has good stability and high functional integration level, and is internally provided with a CAN communication function; the voltage acquisition circuit adopts a resistive voltage division mode to adopt super capacitor module voltage and sends the super capacitor module voltage to an AD input port of the singlechip; the temperature acquisition circuit adopts the relative temperature of the super capacitor in a mode of adopting NTC temperature resistance and high-precision resistance voltage division, and sends the relative temperature to an AD input port of the singlechip; the CAN communication circuit realizes isolated CAN communication and ensures digital signal communication between all intelligent super capacitor modules and with an elevator energy recovery system main board; when the energy storage unit of the elevator energy recovery system consists of a plurality of intelligent super capacitor modules under the action of the hardware IP address distribution circuit, the hardware IP address distribution circuit automatically distributes a unique IP address for the module according to the actual situation of module cascading.
In the diagram of fig. 3 (schematic diagram of transformer balancing module circuit), a transformer balancing module circuit schematic diagram is shown, and in the diagram, T1 is a balancing transformer, which is used for implementing electromagnetic conversion, and input direct-current voltage is from super capacitor groups of high voltage. D1 and C52 form a rectifying and filtering circuit, and are used for converting high-frequency alternating voltage converted by the transformer into direct voltage and filtering the direct voltage to charge the super capacitor grouped by low voltage. Q1 and Q2 are switching MOS tubes, and form a push-pull switching circuit together with an equalizing transformer, so as to provide high-frequency electromagnetic energy for the transformer equalizing circuit. U1 adopts EG3525 as a core chip and forms a PWM generating circuit together with peripheral auxiliary elements thereof, and PWM driving signals are provided for Q1 and Q2.
The foregoing has described in detail the invention provides an elevator energy recovery system based on an intelligent super capacitor module, and specific examples are applied to illustrate the principles and embodiments of the invention, and the above examples are only used to help understand the method and core idea of the invention; also, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Although the application has been described herein with reference to the above-described illustrative embodiments thereof, the foregoing embodiments are merely preferred embodiments of the present application, and it should be understood that the embodiments of the present application are not limited to the above-described embodiments, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure.
Claims (10)
1. Elevator energy recovery system based on intelligent super capacitor module, its characterized in that: the system comprises a plurality of connected super capacitor modules, wherein the super capacitor modules are connected with a CAN communication bus and are connected with a system control main board through the CAN communication bus; the super capacitor module is connected with the direct current contactor through the IGBT, the driving inductor and the power inductor, and is also connected with the elevator controller; the super capacitor module is also connected with the single-phase inversion module and outputs 220VAC;
the system control main board is respectively connected with a display module, an IGBT, a driving inductor and a power inductor, and a direct current contactor;
The elevator controller is connected with the direct current contactor, and is also connected with an elevator input switch, and the elevator input switch is connected with a 380VAC input power supply through the three-phase contactor;
the super capacitor module comprises a super capacitor single body primary protection circuit and a super capacitor single body grouping type secondary transformer type energy moving active equalization circuit;
The primary protection circuit of the super capacitor monomer discharges the corresponding super capacitor monomer with small current of 1-2A when the voltage detection circuit of the super capacitor monomer detects that the voltage of the super capacitor monomer is higher than 2.65V; the super capacitor single block type secondary transformer type energy moving active equalization circuit has the function of isolating and transforming 24V direct current voltage sent by a main board and then charging super capacitor blocks with the lowest voltage, so that the purpose of reducing voltage difference among the blocks is achieved.
2. The elevator energy recovery system based on intelligent supercapacitor module according to claim 1, wherein:
The super capacitor module further comprises a super capacitor single voltage detection circuit, a super capacitor grouping PWM waveform generation circuit, an intelligent module on-board switching power supply, a module singlechip circuit, a module hardware IP address automatic distribution circuit, a module CAN communication circuit, a module active equalization power supply input circuit, a 220V inversion emergency module, a wide voltage range system power supply and an IGBT driving module; the elevator energy recovery system based on the intelligent super capacitor module further comprises an LED nixie tube display module, a BUCK/BOOST conversion inductor, a main board DSP control system, a main board CAN communication module, a main board voltage detection system, a current detection system, a power self-locking system and an auxiliary power output control system, wherein the input three-phase contactor, the 24V direct current bus control contactor, the high-power IGBT module, the input/output and energy storage connection air switch and the system switch;
the super capacitor grouping PWM waveform generation circuit is used for generating 30KHz complementary PWM waves to drive MOS tubes in the super capacitor single grouping type secondary transformer type energy transfer equalization circuit, so that switching control is realized; the module singlechip circuit is used for realizing digital signal processing; the module hardware IP address automatic allocation circuit is used for automatically allocating an IP address to each super capacitor module in the system by adopting a hardware logic combination mode of a signal input/output interface; the 220V inversion emergency module inverts the direct-current voltage of the intelligent super capacitor module into 220V alternating-current voltage for the elevator system to serve as low-voltage power supply in the elevator control cabinet; the system power supply with the wide voltage range adopts a switching power supply mode, and the input voltage range can reach 70V-200V; the IGBT driving module consists of a bootstrap power supply and a driving circuit, and is matched with a BUCK/BOOST conversion inductor to realize a voltage-boosting function; the LED nixie tube display module consists of an LED digital display screen, a stabilized voltage supply, a singlechip, a communication circuit and a digital driving circuit and is responsible for information display of a system; the BUCK/BOOST conversion inductor is wound by a high-power EE magnetic core and a plurality of enamelled wires, so that the energy conversion of the BUCK voltage is realized; the DSP control system adopts a TMS320F28335 digital signal processing chip to realize signal processing and various control of each unit of the main board; the main board CAN communication module is used for realizing digital communication between the main board and the display module as well as between the main board and the intelligent super capacitor module energy storage module; the voltage detection system adopts a linear optocoupler isolation technology to realize accurate detection of the system bus and super capacitor voltage, and sends the voltage to the DSP for digital signal processing;
the super capacitor in the super capacitor module is an electric double layer capacitor;
the secondary transformer type energy moving active equalization circuit adopts a push-pull switch circuit.
3. The elevator energy recovery system based on intelligent supercapacitor module according to claim 2, wherein: the input voltage of the 220V inversion emergency module is 350V direct current voltage; the input voltage range of the wide voltage range system power supply is 70V-200V.
4. The elevator energy recovery system based on intelligent supercapacitor module according to claim 2, wherein: the LED nixie tube display module is arranged on a system chassis panel and provides a human-computer interaction interface; the BUCK/BOOST conversion inductor is wound by a high-power EE magnetic core and a plurality of enamelled wires; the singlechip in the module singlechip circuit adopts an MC9S12DJ64 singlechip.
5. The elevator energy recovery system based on intelligent supercapacitor module according to claim 2, wherein: the voltage detection system adopts a linear optocoupler isolation technology to realize accurate detection of the system bus and the super capacitor voltage; the auxiliary power supply output control system adopts a triode as an output control switching device.
6. The elevator energy recovery system based on intelligent supercapacitor module according to claim 2, wherein: the capacity of the super capacitor monomer is 500F or 3000F.
7. The intelligent supercapacitor module-based elevator energy recovery system according to claim 1,2 or 6, wherein: the super capacitor energy storage unit in the intelligent super capacitor module is formed by combining a plurality of groups of sub-modules in series or in parallel and a mixed mode.
8. The elevator energy recovery system based on intelligent supercapacitor module according to claim 2, wherein: the secondary transformer type energy moving active equalization circuit adopts a PQ3535 magnetic core to wind an equalization transformer.
9. The elevator energy recovery system based on intelligent supercapacitor module according to claim 2, wherein: the module hardware IP address automatic allocation circuit adopts a mode of connecting and combining signal line input and output in a staggered manner.
10. The elevator energy recovery system based on the intelligent supercapacitor module according to claim 2, wherein the DSP control system adopts a TMS320F28335 digital signal processing chip as a core digital signal processing chip.
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| CN108808820B (en) * | 2018-08-27 | 2023-11-24 | 南通科技职业学院 | An elevator energy-saving system based on supercapacitor |
| CN109950963A (en) * | 2019-03-14 | 2019-06-28 | 成都凹克新能源科技有限公司 | An automatic energy-saving system for DC high voltage kowtow machine based on supercapacitor |
| CN110161991A (en) * | 2019-05-07 | 2019-08-23 | 湖南科技大学 | A kind of super capacitor mould group backup power supply distributed management system for pitch system of wind driven generator |
| CN110445236B (en) * | 2019-07-30 | 2024-04-30 | 成都信息工程大学 | Energy conversion device and working method thereof |
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