CN117294216A - Control system and control method for mining fan frequency converter - Google Patents
Control system and control method for mining fan frequency converter Download PDFInfo
- Publication number
- CN117294216A CN117294216A CN202311422387.5A CN202311422387A CN117294216A CN 117294216 A CN117294216 A CN 117294216A CN 202311422387 A CN202311422387 A CN 202311422387A CN 117294216 A CN117294216 A CN 117294216A
- Authority
- CN
- China
- Prior art keywords
- contactor
- power supply
- converter
- storage battery
- energy storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005065 mining Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 10
- 238000004146 energy storage Methods 0.000 claims abstract description 33
- 239000003990 capacitor Substances 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 20
- 238000004891 communication Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 238000003062 neural network model Methods 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 3
- 238000013507 mapping Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 3
- 230000001131 transforming effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000003245 coal Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
- H02P21/0014—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control using neural networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a control system of a mining fan frequency converter, which comprises a power supply, a converter, an energy storage battery, a first rectifying unit, a second rectifying unit, a first inverter unit, a second inverter unit and an energy storage battery, wherein the power supply is connected with the first rectifying unit through the first contactor, the second rectifying unit is connected with the fan through the second inverter unit, and the converter is respectively connected with the first contactor, the second rectifying unit and the second inverter unit. The invention can improve the defects of the prior art, ensure uninterrupted operation of the fan and provide guarantee for safe production of coal mines.
Description
Technical Field
The invention relates to the field of coal mine ventilation equipment, in particular to a control system and a control method of a mining fan frequency converter.
Background
In the underground coal exploitation process, because flammable and explosive gases such as gas, coal dust and the like exist, if underground ventilation is not smooth, gas accumulation is caused, gas explosion is easy to generate, personnel casualties can be caused, and the production facilities of a mine are greatly damaged. Therefore, in the underground production process, the main ventilator must be kept in normal operation all the time so as to discharge the gas out of the mine in time, so that the concentration of the gas is reduced to be within a safe range, and possible explosion accidents are avoided. However, due to the complex underground environment, various emergency conditions are easy to occur, so that the underground local ventilator is powered off to stop running, and the life safety of underground personnel is threatened. Therefore, in order to prevent the local ventilator from stopping operation due to sudden power failure, a reliable uninterrupted power supply device must be designed to ensure continuous operation of the ventilator.
Disclosure of Invention
The invention aims to solve the technical problem of providing a control system and a control method for a mining fan frequency converter, which can solve the defects of the prior art, ensure uninterrupted operation of a fan and provide a guarantee for safe production of coal mines.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
The utility model provides a mining fan converter control system, includes the power, and the power is connected with the rectification unit through contactor one, and the rectification unit passes through the contravariant unit and is connected with the fan, still includes the converter, and the converter is connected with contactor one, rectification unit and contravariant unit respectively, and the converter still is connected with energy storage battery.
Preferably, the converter comprises a second contactor, a third contactor, a fourth contactor, a charging resistor, a capacitor, a discharging resistor, a detection plate, an IGBT I, an IGBT II and a PLC; the positive electrode and the negative electrode of the energy storage battery are connected with the first input end of the detection plate and are used for detecting the electric quantity of the energy storage battery, the positive electrode of the energy storage battery is connected with one end of a contact of the second contactor, the other end of the contact is connected with one end of a contact of the third contactor and then connected with one end of a capacitor and a discharge resistor, the other end of the contact is connected with the positive electrode of the energy storage battery, the negative electrode of the energy storage battery is connected with one end of a contact of the fourth contactor, the other end of the contact is connected with the capacitor and the other end of the discharge resistor, the second input end of the detection plate is connected with the capacitor and is used for collecting the voltage at two ends of the capacitor, a common end of the first IGBT and the second IGBT are connected with one end of the capacitor in series, the other end of the second IGBT is connected with one end of the contact, the other end of the contact is connected with the negative electrode of the rectifying unit, and the other end of the first IGBT is connected with the positive electrode of the rectifying unit; the input end of the detection plate is connected with a power supply for detecting whether an input power supply is normal, the first port of the PLC is an Ethernet interface and is connected with the outside, real-time detection is carried out on system data, the second port of the PLC is a 485 communication interface and is connected with the 485 communication interface of the detection plate, data exchange is carried out in a 485 communication mode, the first output end of the PLC is connected with the coil of the first contactor, the second output end of the PLC is connected with the coil of the second contactor, the third output end of the PLC is connected with the coil of the third contactor, and the fourth output end of the PLC is connected with the coil of the fourth contactor.
The control method of the mining fan frequency converter control system comprises the following steps: the converter monitors the power supply in real time, when the power supply is normal, the input electric energy directly outputs the electric energy to the fan through the contactor I, the rectifying unit and the inversion unit, the converter detects the voltage of the energy storage battery in real time, and when the voltage is lower than a set value, the power supply charges the energy storage battery through the contactor I and the rectifying unit; when the power supply can not normally supply power, the converter cuts off the power supply of the power supply to the system, and the electric energy of the energy storage battery is transmitted to the fan through the inversion unit.
Preferably, the converter collects the voltage fluctuation curve of the power supply in real time, segments the voltage fluctuation curve, extracts the characteristic waveform of each segment of the voltage fluctuation curve, pre-converts the characteristic waveform, and inputs the pre-converted characteristic waveform into the neural network model to obtain the monitoring result of the power supply.
Preferably, pre-transforming the signature comprises the steps of,
the characteristic waveforms form a vector data set, the vector data set is converted into a corresponding data set on an expansion complex plane through full mapping, then the data set in the expansion complex plane is divided according to Gaussian distances to obtain a plurality of data sets, the matching point of each data set is selected, and the data sets are subjected to violent matching with the additional rotation matrix coefficients to obtain a matching data set.
The beneficial effects brought by adopting the technical scheme are as follows: according to the invention, the energy storage system and the converter are added on the basis of the conventional frequency converter, and when the local ventilator is powered off due to the emergency in the pit, the power supply of the energy storage battery to the ventilator can be automatically converted, so that the ventilator can be ensured to run uninterruptedly, and the life safety of production personnel and the coal mine safety production are ensured. Aiming at the problem of interference of power supply voltage fluctuation on detection control, the invention predicts the power supply voltage by optimizing a sampling data structure and utilizing a neural network model, thereby effectively avoiding system misoperation caused by the power supply voltage fluctuation. In conclusion, the invention has the characteristics of simple structure, high control precision and stable performance, and enhances the reliability and safety of equipment operation.
Drawings
Fig. 1 is a system configuration diagram of an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of an embodiment of the present invention.
FIG. 3 is a schematic diagram of a PLC port connection in accordance with one embodiment of the present invention.
Detailed Description
Referring to fig. 1-3, a specific embodiment of the invention comprises a power supply 1, wherein the power supply 1 is connected with a rectifying unit 3 through a first contactor 2, the rectifying unit 3 is connected with a fan 7 through an inversion unit 6, the invention further comprises a converter 4, the converter 4 is respectively connected with the first contactor 2, the rectifying unit 3 and the inversion unit 4, and the converter 4 is further connected with an energy storage battery 5. The converter 4 comprises a second contactor 401, a third contactor 402, a fourth contactor 403, a charging resistor 404, a capacitor 405, a discharging resistor 406, a detection plate 407, an IGBT one 408, an IGBT two 409 and a PLC410; the positive electrode and the negative electrode of the energy storage battery 5 are connected with the first 4071 input end of the detection plate 407 and are used for detecting the electric quantity of the energy storage battery 5, the positive electrode of the energy storage battery 5 is connected with one end of a contact 4012 of a second 401 contactor, the other end of the contact 4012 is connected with one end of a contact 4022 of a third 402 contactor and then connected with one end of a capacitor 405 and one end of a discharging resistor 406, the other end of the contact 4022 is connected with one end of a charging resistor 404 and then connected with the positive electrode of the energy storage battery 5, the negative electrode of the energy storage battery 5 is connected with one end of a contact 4032 of a fourth 403 contactor, the other end of the contact 4032 is connected with the other end of the capacitor 405 and the other end of the discharging resistor 406, the input end 4072 of the detection plate 407 is connected with the capacitor 405 in parallel and is used for collecting the voltage at two ends of the capacitor 405, the common end of the first 408 and the second 409 are connected with one end of the capacitor 405, the other end of the second 409 is connected with one end of the capacitor 405 and then connected with one end of the contact 4032, the other end of the contact 4032 is connected with the negative electrode of the rectifying unit 3, and the other end of the first 408 is connected with the positive electrode of the rectifying unit 3; the input end 4073 of the detection board 407 is connected with the power supply 1 for detecting whether the input power supply is normal, the port one 4101 of the PLC410 is an Ethernet interface, and is connected with the outside to detect system data in real time, the port two 4102 of the PLC410 is a 485 communication interface, and is connected with the 485 communication interface 4074 of the detection board 407, data exchange is performed in a 485 communication mode, the output end one 4103 of the PLC410 is connected with the coil 21 of the contactor one 2, the output end two 4104 of the PLC410 is connected with the coil 4011 of the contactor two 401, the output end three 4105 of the PLC410 is connected with the coil 4021 of the contactor three 402, and the output end four 4106 of the PLC410 is connected with the coil 4031 of the contactor four 403.
When the emergency situation occurs in the power supply 1 and the power supply cannot be normally supplied, the input end three 4073 of the detection plate 407 cannot detect the value of the normal voltage, the power supply of the contactor I2 is cut off through the output end one 4103 of the PLC410, the contact 22 of the contactor I2 is cut off, and therefore the power supply 1 supplies power to the system; the fourth 4106 output of PLC410 drives contactor four 403, which turns on contact 4032 of contactor four 403, and the third 4105 output of PLC410 drives contactor three 402, which turns on contact 4022 of contactor three 402, which activates inverter 4, which precharges the circuit. After the voltage of the input end second 4072 of the detection plate 407 reaches a set value, the precharge is completed, and the output end second 4104 of the PLC410 drives the second contactor 401 to conduct the contact 4012 of the second contactor 401; then, the third 4105 output terminal of the PLC410 cancels the control of the third contactor 402, so that the contact 4022 of the third contactor 402 is opened, and at this time, the electric energy of the energy storage battery 5 is delivered to the inverter unit 6 through the second contactor 401, the fourth contactor 403, the first IGBT 408 and the second IGBT 409 until reaching the fan 7. The process automatically switches the circuit through the real-time detection of the PLC410 to the voltage, and the original external input power supply provides electric energy to be converted into the energy storage battery 5 to directly provide electric energy to be transmitted to the fan 7, so that the uninterrupted operation of the fan 7 is ensured.
The trained neural network model program is preset in the PLC memory, the detection board 407 acquires the voltage fluctuation curve of the power supply 1 in real time, segments the voltage fluctuation curve, extracts the characteristic waveform of each segment of the voltage fluctuation curve, pre-transforms the characteristic waveform, and inputs the characteristic waveform into the neural network model to obtain the monitoring result of the power supply 1. The pre-transformation of the characteristic waveforms comprises the steps of forming a vector data set by the characteristic waveforms, converting the vector data set into a corresponding data set on an extended complex plane through full mapping, dividing the data set in the extended complex plane according to Gaussian distances to obtain a plurality of data sets, selecting a matching point of each data set, and performing violent matching on the data sets and the additional rotation matrix coefficients to obtain a matching data set.
Under normal conditions of the power supply 1, the first 4071 input end of the detection board 407 detects the voltage of the energy storage battery 5 in real time, and when the voltage is lower than a set value, the input electric energy is automatically charged into the energy storage battery 5 through the first contactor 2 and the rectifying unit 3 and the converter 4. After the emergency condition of the input power supply is guaranteed, the energy storage battery 5 has enough electric energy, and the power supply to the system is met.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A mining fan converter control system which characterized in that: the power supply comprises a power supply (1), wherein the power supply (1) is connected with a rectifying unit (3) through a first contactor (2), the rectifying unit (3) is connected with a fan (7) through an inversion unit (6), the power supply further comprises a converter (4), the converter (4) is respectively connected with the first contactor (2), the rectifying unit (3) and the inversion unit (4), and the converter (4) is further connected with an energy storage battery (5).
2. The mining fan frequency converter control system of claim 1, wherein: the converter (4) comprises a second contactor (401), a third contactor (402), a fourth contactor (403), a charging resistor (404), a capacitor (405), a discharging resistor (406), a detection plate (407), a first IGBT (408), a second IGBT (409) and a PLC (410); the positive pole and the negative pole of the energy storage battery (5) are connected with the first input end (4071) of the detection plate (407) and are used for detecting the electric quantity of the energy storage battery (5), the positive pole of the energy storage battery (5) is connected with one end of a contact (4012) of a second contactor (401), the other end of the contact (4012) is connected with one end of a third contactor (402) and then connected with one end of a capacitor (405) and one end of a discharging resistor (406), the other end of the contact (4022) is connected with one end of a charging resistor (404), the other end of the charging resistor (404) is connected with the positive pole of the energy storage battery (5), the negative pole of the energy storage battery (5) is connected with one end of a contact (4032) of a fourth contactor (403), the other end of the contact (4032) is connected with the capacitor (405) and the other end of the discharging resistor (406), the input end (4072) of the detection plate (407) is connected with the capacitor (405) in parallel and then connected with one end of the capacitor (405) for collecting the voltage of the two ends of the capacitor (405) in series, the public end of the IGBT (408) and one end of the two (409) is connected with one end of the capacitor (405) in series, the other end of the IGBT I (408) is connected with the positive electrode of the rectifying unit (3); the input end (4073) of the detection plate (407) is connected with the power supply (1) and used for detecting whether the input power supply is normal, the port one (4101) of the PLC (410) is an Ethernet interface and is connected with the outside, the real-time detection is carried out on system data, the port two (4102) of the PLC (410) is a 485 communication interface and is connected with the 485 communication interface (4074) of the detection plate (407), data exchange is carried out in a 485 communication mode, the output end one (4103) of the PLC (410) is connected with the coil (21) of the contactor one (2), the output end two (4104) of the PLC (410) is connected with the coil (4011) of the contactor two (401), the output end three (4105) of the PLC (410) is connected with the coil (4021) of the contactor three (402), and the output end four (4106) of the PLC (410) is connected with the coil (4031) of the contactor four (403).
3. A control method of the mining fan frequency converter control system according to claim 1 or 2, characterized by comprising the steps of: the converter (4) monitors the power supply (1) in real time, when the power supply (1) is normal, the input electric energy directly outputs the electric energy to the fan (7) through the first contactor (2), the rectifying unit (3) and the inverting unit (6), the converter (4) detects the voltage of the energy storage battery (5) in real time, and when the voltage is lower than a set value, the power supply (1) charges the energy storage battery (5) through the first contactor (2) and the rectifying unit (3), and the converter (4); when the power supply (1) cannot normally supply power, the converter (4) cuts off the power supply (1) to supply power to the system, and the electric energy of the energy storage battery (5) is transmitted to the fan (7) through the inversion unit (6).
4. A control method of a mining fan frequency converter control system according to claim 3, wherein: the converter (4) collects the voltage fluctuation curve of the power supply (1) in real time, segments the voltage fluctuation curve, extracts the characteristic waveform of each segment of the voltage fluctuation curve, pre-converts the characteristic waveform and inputs the characteristic waveform into the neural network model to obtain the monitoring result of the power supply (1).
5. The control method of the mining fan frequency converter control system according to claim 4, wherein: pre-transforming the signature comprises the steps of,
the characteristic waveforms form a vector data set, the vector data set is converted into a corresponding data set on an expansion complex plane through full mapping, then the data set in the expansion complex plane is divided according to Gaussian distances to obtain a plurality of data sets, the matching point of each data set is selected, and the data sets are subjected to violent matching with the additional rotation matrix coefficients to obtain a matching data set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311422387.5A CN117294216A (en) | 2023-10-31 | 2023-10-31 | Control system and control method for mining fan frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311422387.5A CN117294216A (en) | 2023-10-31 | 2023-10-31 | Control system and control method for mining fan frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117294216A true CN117294216A (en) | 2023-12-26 |
Family
ID=89239132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311422387.5A Withdrawn CN117294216A (en) | 2023-10-31 | 2023-10-31 | Control system and control method for mining fan frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117294216A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201629602U (en) * | 2010-03-23 | 2010-11-10 | 王聪 | Intelligent emergency power supply of local ventilator for mine |
| CN202524158U (en) * | 2012-05-07 | 2012-11-07 | 重庆飞尔达机械有限责任公司 | Emergency power supply system of coalmine ventilator |
| CN110458896A (en) * | 2019-08-07 | 2019-11-15 | 成都索贝数码科技股份有限公司 | A kind of camera internal reference method for solving and system based on absolute quadric |
| CN114844197A (en) * | 2022-05-13 | 2022-08-02 | 河北工业大学 | Emergency energy storage power supply system of local ventilator of coal mine |
| CN116400264A (en) * | 2023-06-09 | 2023-07-07 | 广东工业大学 | Inverter open-circuit fault diagnosis method and system |
-
2023
- 2023-10-31 CN CN202311422387.5A patent/CN117294216A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201629602U (en) * | 2010-03-23 | 2010-11-10 | 王聪 | Intelligent emergency power supply of local ventilator for mine |
| CN202524158U (en) * | 2012-05-07 | 2012-11-07 | 重庆飞尔达机械有限责任公司 | Emergency power supply system of coalmine ventilator |
| CN110458896A (en) * | 2019-08-07 | 2019-11-15 | 成都索贝数码科技股份有限公司 | A kind of camera internal reference method for solving and system based on absolute quadric |
| CN114844197A (en) * | 2022-05-13 | 2022-08-02 | 河北工业大学 | Emergency energy storage power supply system of local ventilator of coal mine |
| CN116400264A (en) * | 2023-06-09 | 2023-07-07 | 广东工业大学 | Inverter open-circuit fault diagnosis method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107219470B (en) | On-line checking discharge device and method for storage battery pack | |
| CN210577909U (en) | Base station backup power supply management system and integrated equipment with same | |
| CN103944238B (en) | High stable is convenient to the high-power power battery safeguarded | |
| CN211183525U (en) | AC/DC integrated UPS | |
| CN210109280U (en) | Remote capacity checking system for storage battery of electric direct-current power supply | |
| CN207598282U (en) | A kind of coal mine local ventilation system | |
| CN104950262A (en) | Charge-discharge test system | |
| CN114137427A (en) | Method for automatically checking capacity of single storage battery in storage battery pack | |
| CN117294216A (en) | Control system and control method for mining fan frequency converter | |
| CN205709258U (en) | Elevator standby electricity management and control system | |
| CN203416044U (en) | Self-starting DC generator | |
| CN204316175U (en) | Uninterruption power source | |
| CN102983596A (en) | N+1 storage battery pack on-line detection maintenance seamless power supply device | |
| WO2022033218A1 (en) | Power supply apparatus and method based on high-speed flywheel, and related device | |
| CN107727967A (en) | Large power energy storage system simulation test platform | |
| CN204761067U (en) | Communication energy storage power supply system | |
| CN204118774U (en) | The online charge and discharge device of a kind of storage battery | |
| CN113253124A (en) | Safe and energy-saving power storage battery nuclear capacity discharging device and method | |
| CN203754272U (en) | Electric control system of gantry crane | |
| CN107795333B (en) | Local ventilation system for coal mine | |
| CN112798970A (en) | Remote capacity checking system for storage battery of transformer substation | |
| CN109245286A (en) | A kind of transformerless emergency power supply | |
| CN205544373U (en) | Portable electric power emergency power supply unit that communicates | |
| CN216904388U (en) | Direct current power supply system for storage battery pack | |
| CN216162427U (en) | Intelligent charging control system for underground monorail crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20231226 |
|
| WW01 | Invention patent application withdrawn after publication |