CN110034691B - Submersible pump integrated with current transformer power supply device - Google Patents
Submersible pump integrated with current transformer power supply device Download PDFInfo
- Publication number
- CN110034691B CN110034691B CN201910403409.0A CN201910403409A CN110034691B CN 110034691 B CN110034691 B CN 110034691B CN 201910403409 A CN201910403409 A CN 201910403409A CN 110034691 B CN110034691 B CN 110034691B
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- power supply
- current
- output
- 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.)
- Active
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 230000006698 induction Effects 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/043—Conversion of ac power input into dc power output without possibility of reversal by static converters using transformers or inductors only
Abstract
The submersible pump of the integrated current transformer power supply device integrates the current transformer power supply device in the submersible pump, and can convert the induction current generated by the current transformer into low-voltage direct current; compared with a structure adopting a control transformer, the submersible pump integrated with the current transformer power supply device has the characteristic of small volume of the current transformer and the power supply conversion device, and provides a larger space for integration of other low-voltage electric equipment.
Description
Technical field:
the invention relates to the technical field of submersible pumps, in particular to a submersible pump integrating a current transformer power supply device.
The background technology is as follows:
with the continuous promotion of industrial 4.0 process in the global scope, the internet of things, intelligent perception and real-time monitoring become basic functions which are necessary to be integrated by more and more industrial equipment. The submersible pump is used as a universal machine and is widely applied to production and living occasions such as petroleum, chemical industry, coal mining, agricultural irrigation, urban water supply and drainage and the like. In general, problems of complex fluid medium of the submersible pump, fragile rotating mechanical parts, bad underwater operation conditions and the like lead the health state of the submersible pump to often face a great challenge, and the real-time state monitoring is particularly necessary. For example: the remote intelligent digital explosion-proof submersible slurry pump disclosed in the patent with the patent application number of 201610217954.7 is provided with a control unit, a power supply unit, a motor detection unit and a data transmission unit in an electric sealing cavity so as to realize remote monitoring of the pump, prevent abnormal operation and prolong the service life of equipment.
The general technical approach of the real-time state monitoring of the submersible pump is to integrate a data acquisition unit capable of acquiring the operation parameters of the pump inside the submersible pump and transmit the operation parameters to a monitoring server through a data communication unit. However, the data acquisition unit and the data communication unit often need 3.3V-12V low-voltage direct current power supply, but the submersible pump power supply specification is generally 380V, 660V or 1140V three-phase alternating current, and the data acquisition unit and the data communication unit cannot be directly powered. This requires an integrated power conversion device or external low voltage dc power supply. The lift of the submersible pump is generally different from tens of meters to hundreds of meters, and the power supply through the independent direct current cable can lead to energy waste on the cable, so that the power transmission efficiency is low, and the power output quality is difficult to ensure. Considering that the power of the data acquisition unit and the data communication unit is generally smaller, the electric energy can be acquired by directly taking the electric energy from the three-phase alternating current power supply cable inside the pump. One of the modes is realized by adopting a control transformer, but the volume and the mass of the control transformer are usually larger due to larger voltage conversion ratio, the requirement on the internal space of the pump is higher, the integrability is lower, and the product shape is also not ideal. Finally, how to construct a small-size and intensive pump internal low-voltage power supply unit becomes a main technical problem for restricting the monitoring of the pump state.
The invention comprises the following steps:
in order to solve the technical problems, the invention provides the submersible pump integrating the current transformer power supply device, and stable low-voltage direct current can be output inside the submersible pump.
The invention is realized by the following technical scheme:
the utility model provides an integrated current transformer power supply unit's immersible pump, includes the pump body, characterized by installs the current transformer of predetermineeing quantity in the pump body, the inside power wire of pump body passes the current transformer still includes and installs in the pump body, be connected with the current transformer and will the power conversion device of low-voltage direct current is converted into to the induced current of current transformer output.
In another aspect of the present invention, the power conversion device includes a rectifying circuit connected to a current transformer and converting an induced current generated by the current transformer into a direct current, a protection circuit connected to the rectifying circuit, a filter circuit connected to the protection circuit and performing a low-pass filtering process on an output current of the protection circuit, a super capacitor connected to the filter circuit, and a boost circuit connected to the filter circuit and performing a boost process on an output voltage of the filter circuit; the control circuit is connected with the rechargeable battery and the boost circuit respectively, controls the charging and discharging of the rechargeable battery and controls the output power supply.
In another aspect of the present invention, the power conversion device further includes a voltage regulation circuit connected to the control circuit and converting the low voltage dc power output by the control circuit into a low voltage adapted dc power of different specifications.
In another aspect of the present invention, the protection circuit operates according to a voltage threshold, and is grounded when the output voltage of the rectifying circuit exceeds the voltage threshold, and is kept in an off state when the output voltage of the rectifying circuit does not exceed the voltage threshold, so that the current charges the super capacitor.
In another aspect of the present invention, the control method of the output power supply of the control circuit is: setting a normal working voltage and a hysteresis working voltage of load output, when the internal voltage of the control circuit continuously rises to be larger than the hysteresis working voltage, starting the load output circuit, and when the internal voltage of the control circuit continuously drops to be smaller than the normal working voltage, closing the load output circuit.
In another aspect of the present invention, the method for controlling the charge and discharge of the rechargeable battery by the control circuit includes: and setting an overcharging voltage threshold and an undercharging voltage threshold of the rechargeable battery, charging the rechargeable battery when the internal voltage of the control circuit is larger than 2V, closing a charging circuit of the rechargeable battery when the internal voltage of the control circuit continuously rises to be larger than the overcharging voltage threshold, and closing a discharging circuit of the rechargeable battery when the internal voltage of the control circuit continuously drops to be smaller than the undercharging voltage threshold.
The beneficial effects of the invention are as follows:
the submersible pump integrated with the current transformer power supply device integrates the current transformer power supply device in the submersible pump machine, and can convert the induction current generated by the current transformer into low-voltage direct current; compared with a structure adopting a control transformer, the submersible pump integrated with the current transformer power supply device has the characteristic of small volume of the current transformer and the power supply conversion device, and provides a larger space for integration of other low-voltage electric equipment.
The invention has the beneficial effects that the induction current generated by the current transformer can be collected, conditioned and controlled.
The invention has the beneficial effects that the energy storage can be carried out based on the super capacitor and the rechargeable battery, and the stable low-voltage direct current supply is ensured.
The invention has the advantage that the low-voltage direct current with different specifications can be output through the additional voltage regulating circuit.
Description of the drawings:
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is a schematic block diagram of a power conversion device according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a rectifying circuit, a protecting circuit and a filtering circuit according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a control loop of a pre-protection circuit according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a boost circuit according to an embodiment of the invention.
Fig. 6 is a schematic diagram of a control circuit according to an embodiment of the invention.
In the accompanying drawings: 1. the power supply device comprises a rectifying circuit, 2, a protection circuit, 201, a pre-protection circuit, 202, a charging protection circuit, 3, a filter circuit, 4, a super capacitor, 5, a booster circuit, 6, a control circuit, 7, a rechargeable battery, 8, a voltage regulating circuit, 9, a pump body, 10, a current transformer, 11 and a power supply conversion device.
The specific embodiment is as follows:
embodiments of the present invention will be further described with reference to the accompanying drawings and examples:
in the description of the present invention, it should be understood that the description of indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples
The submersible pump comprises a pump body 9, a preset number of current transformers 10 arranged in the pump body 9 and a power supply conversion device 11 arranged in the pump body 9, wherein a power supply wire in the pump body 9 passes through the current transformers 10, the power supply conversion device 11 is connected to the current transformers 10, and when the power supply wire of the pump supplies power, the induced current output by the current transformers 10 is converted into low-voltage direct current;
the power conversion device 11 comprises a rectifying circuit 1, a protection circuit 2, a filter circuit 3, a super capacitor 4, a boost circuit 5, a control circuit 6 and a rechargeable battery 7, as shown in fig. 2 to 6;
the rectifying circuit 1 is connected with the current transformer 10 and converts the induction current generated by the current transformer into direct current;
the protection circuit 2 is connected with the rectification circuit 1, acts according to a voltage threshold, and when the output voltage of the rectification circuit 1 exceeds the voltage threshold, the protection circuit 2 is grounded to prevent the super capacitor 4 from being damaged, otherwise, the protection circuit is kept in an off state, so that the current can charge the super capacitor 4;
the filter circuit 3 is connected with the protection circuit 2, and performs low-pass filter processing on the current output by the protection circuit 2 to stabilize the current;
the super capacitor 4 is connected with the filter circuit 3 and is used for accumulating charges and collecting energy;
the boosting circuit 5 is connected with the filter circuit 3 and is used for boosting the output voltage of the filter circuit 3;
the control circuit 6 is connected with the boost circuit 5 and the rechargeable battery 7, and realizes load output control and charge and discharge control of the rechargeable battery 7.
The current transformer 10 may be provided in one or more of its components.
In addition, the power conversion device 11 may further include a voltage regulation circuit 8, where the voltage regulation circuit 8 is connected to the control circuit 6, and further converts the low-voltage direct current into low-voltage adaptive direct current with different specifications.
The load output control method of the control circuit 6 is as follows: the normal operation voltage and the hysteresis operation voltage of the load output are set, the load output circuit is turned on when the internal voltage of the control circuit 6 continuously rises above the hysteresis operation voltage, and the load output circuit is turned off when the internal voltage of the control circuit 6 continuously falls below the normal operation voltage.
The control circuit 6 controls the charge and discharge of the rechargeable battery 7 by: the overcharge voltage threshold and the undercharge voltage threshold of the rechargeable battery 7 are set, when the internal voltage of the control circuit 6 is greater than 2V, the rechargeable battery 7 is charged, when the internal voltage of the control circuit 6 is continuously increased to be greater than the overcharge voltage threshold, the charging circuit of the rechargeable battery 7 is turned off, and when the internal voltage of the control circuit 6 is continuously decreased to be less than the undercharge voltage threshold, the discharging circuit of the rechargeable battery 7 is turned off.
Wherein the rectifying circuit 1 constructs a full-bridge rectifying circuit based on four diodes; the filter circuit 3 adopts capacitors C1 and C2 to construct a low-pass filter circuit so as to stabilize current; the protection circuit 2 in fig. 2 is implemented by the front-end protection circuit 201 in fig. 3, the charge protection circuit 202, and the front-end protection control circuit shown in fig. 4, respectively. The charging protection circuit 202 controls the main circuit by the schottky diode D6 and the transistor Q2, and when vin+ voltage is greater than VSUP, the clamp diodes D7 and D8 drive Q2 to be turned on to charge the supercapacitor CSUP, otherwise, the supercapacitor CSUP outputs current through the schottky diode D6. The pre-protection circuit 201 is mainly implemented by a schottky diode D5 and a transistor Q1, the schottky diode D5 limits the reverse flow of the current, and the switching operation of the transistor Q1 is driven by the pre-protection control circuit shown in fig. 4.
As shown in fig. 4, the pre-protection control circuit is mainly implemented by a TLV3492AIDR voltage comparator, the voltage comparator reference voltage v_3.6 is provided by the boost circuit shown in fig. 5, and if the super capacitor voltage VSUP is greater than v_3.6, the nmos_dri outputs a high level to drive the Q1 in fig. 4 to be grounded, so as to achieve the protection purpose.
As shown in fig. 5, in the present embodiment, the TPS61021ADSGR boost conversion chip is used to boost the output voltage of the filter circuit 3 to v_3.6, and the accessory circuit design in fig. 5 is well known to those skilled in the art and will not be described again.
As shown in fig. 6, the present embodiment uses a BQ25505RGRR power management chip to implement the control circuit 6 in fig. 1. Based on the chip operating principle, the resistance values r13=4.75mΩ, r14=8.25mΩ, r15=4.22mΩ, r16=8.06mΩ, r17=0.689mΩ of the programming resistor in fig. 6 are set, and the overcharge voltage threshold of the BQ25505 RGRR-type power management chip is 4.97V, the normal operating voltage is 3.5V, and the hysteresis operating voltage is 3.7V. And, the built-in undercharge voltage threshold of BQ25505RGRR type power management chip is 2V. The rechargeable lithium battery BT is connected to the vbat_sec pin of the BQ25505RGRR power management chip.
The load output control of the power management chip BQ25505RGRR is realized as follows: if the internal logic voltage of the VSTOR continuously rises to be larger than the hysteresis working voltage of 3.7V, the load output circuit of the VSTOR pin is started, and if the internal logic voltage of the VSTOR continuously drops to be smaller than the normal working voltage of 3.5V, the load output circuit of the VSTOR pin is closed. The control method is stable and reliable.
The charge and discharge control of the rechargeable battery BT by the power management chip BQ25505RGRR is realized as follows: the v_3.6 voltage input to vin_dc is collected and controlled and output to the VSTOR pin. And the VSTOR pin is connected with an internal logic control circuit of the chip. If the internal logic voltage of the VSTOR is greater than 2V, controlling to start to charge the rechargeable battery BT; if the internal logic voltage of the VSTOR continuously rises to the overcharging voltage threshold value which is larger than 4.97V, the internal charging circuit of the rechargeable battery BT is closed; when the VSTOR internal logic voltage continues to drop below the undercharge voltage threshold value of 2V, the internal discharge circuit of the rechargeable battery BT is turned off. The control method is stable and reliable.
Embodiments of the present invention may further include implementation of a voltage regulating circuit 8, where the voltage regulating circuit 8 is connected to the control circuit 6, to further convert the low voltage dc to a low voltage adapted dc of different specifications. A typical implementation of the voltage regulating circuit 8 may use a MC34063 type switching regulator chip to achieve a low voltage adapted dc output in the range of 5V-15V. The voltage regulating circuit can be realized by a person skilled in the art based on the data manual design of the MC34063 type switch voltage regulating chip according to actual requirements, and is connected to the control circuit shown in fig. 6, and the description is omitted here.
In summary, the foregoing description is only of the preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the claims should be construed to fall within the scope of the invention.
Claims (3)
1. The submersible pump of the integrated current transformer power supply device comprises a pump body (9), and is characterized in that a preset number of current transformers (10) are arranged in the pump body (9), an internal power supply wire of the pump body (9) penetrates through the current transformers (10), the submersible pump further comprises a power supply conversion device (11) which is arranged in the pump body (9), is connected with the current transformers (10) and converts an induced current output by the current transformers (10) into low-voltage direct current, the power supply conversion device (11) comprises a rectifying circuit (1) which is connected with the current transformers (10) and converts the induced current generated by the current transformers into direct current, a protection circuit (2) which is connected with the rectifying circuit (1), a filter circuit (3) which is connected with the protection circuit (2) and performs low-pass filtering treatment on the output current of the protection circuit (2), a super capacitor (4) which is connected with the filter circuit (3), and a boosting circuit (5) which is connected with the filter circuit (3) and processes the output voltage of the filter circuit (3); the power supply conversion device comprises a rechargeable battery (7), a control circuit (6) which is respectively connected with the rechargeable battery (7) and a boost circuit (5) and controls the charging and discharging of the rechargeable battery (7) and the output power supply, and the power supply conversion device (11) further comprises a voltage regulating circuit (8) which is connected with the control circuit (6) and converts low-voltage direct current output by the control circuit (6) into low-voltage adaptive direct current with different specifications, the protection circuit (2) acts according to a voltage threshold, the protection circuit (2) is grounded when the output voltage of the rectifying circuit (1) exceeds the voltage threshold, and the power supply is kept in an off state when the output voltage of the rectifying circuit (1) does not exceed the voltage threshold, so that the current charges the super capacitor (4).
2. The submersible pump integrated with a current transformer power supply device according to claim 1, characterized in that the control method of the output power supply of the control circuit (6) is: setting a normal working voltage and a hysteresis working voltage of load output, when the internal voltage of the control circuit (6) continuously rises to be larger than the hysteresis working voltage, starting the load output circuit, and when the internal voltage of the control circuit (6) continuously drops to be smaller than the normal working voltage, closing the load output circuit.
3. The submersible pump integrated with a current transformer power supply device according to claim 1, characterized in that the control circuit (6) controls the charge and discharge of the rechargeable battery (7) by: and setting an overcharge voltage threshold and an undercharge voltage threshold of the rechargeable battery (7), charging the rechargeable battery (7) when the internal voltage of the control circuit (6) is larger than 2V, closing a charging circuit of the rechargeable battery (7) when the internal voltage of the control circuit (6) continuously rises to be larger than the overcharge voltage threshold, and closing a discharging circuit of the rechargeable battery (7) when the internal voltage of the control circuit (6) continuously drops to be smaller than the undercharge voltage threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403409.0A CN110034691B (en) | 2019-05-15 | 2019-05-15 | Submersible pump integrated with current transformer power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403409.0A CN110034691B (en) | 2019-05-15 | 2019-05-15 | Submersible pump integrated with current transformer power supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110034691A CN110034691A (en) | 2019-07-19 |
| CN110034691B true CN110034691B (en) | 2023-12-19 |
Family
ID=67242268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910403409.0A Active CN110034691B (en) | 2019-05-15 | 2019-05-15 | Submersible pump integrated with current transformer power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110034691B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11215694A (en) * | 1998-01-21 | 1999-08-06 | Tokyo Gas Co Ltd | Easily stabilized dc power unit |
| WO2014022969A1 (en) * | 2012-08-07 | 2014-02-13 | 华为终端有限公司 | Device, method and user equipment for power supply |
| WO2016045607A1 (en) * | 2014-09-26 | 2016-03-31 | 上海电科电器科技有限公司 | Electronic trip unit protection device and protection method |
| CN106438319A (en) * | 2015-08-13 | 2017-02-22 | 青岛三利中德美水设备有限公司 | Sinking pump comprehensive protection system |
| CN209571959U (en) * | 2019-05-15 | 2019-11-01 | 济宁安泰矿山设备制造有限公司 | A kind of immersible pump of integrated current transformer for supplying power device |
-
2019
- 2019-05-15 CN CN201910403409.0A patent/CN110034691B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11215694A (en) * | 1998-01-21 | 1999-08-06 | Tokyo Gas Co Ltd | Easily stabilized dc power unit |
| WO2014022969A1 (en) * | 2012-08-07 | 2014-02-13 | 华为终端有限公司 | Device, method and user equipment for power supply |
| WO2016045607A1 (en) * | 2014-09-26 | 2016-03-31 | 上海电科电器科技有限公司 | Electronic trip unit protection device and protection method |
| CN106438319A (en) * | 2015-08-13 | 2017-02-22 | 青岛三利中德美水设备有限公司 | Sinking pump comprehensive protection system |
| CN209571959U (en) * | 2019-05-15 | 2019-11-01 | 济宁安泰矿山设备制造有限公司 | A kind of immersible pump of integrated current transformer for supplying power device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110034691A (en) | 2019-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102763303B (en) | Battery protecting circuit and method for energy collecting device circuit | |
| CN107750425A (en) | For the charging system of terminal, charging method and power supply adaptor, Switching Power Supply | |
| EP3624322A1 (en) | Power supply management module, management method and energy system for triboelectric nanogenerator | |
| CN109219913A (en) | Charging system, charging method and power supply adaptor | |
| CN106787088A (en) | It is applied to the self powered supply management circuit of discontinuous piezoelectric energy acquisition system | |
| AU730758B2 (en) | Power unit and charger for a battery powered electrical apparatus and method | |
| CN1402901A (en) | Battery pack | |
| CN203481855U (en) | Portable power supply device | |
| CN108199462B (en) | AC-DC conversion circuit | |
| CN214255866U (en) | Double-coil inner and outer ring type energy taking device on transmission line | |
| CN110034691B (en) | Submersible pump integrated with current transformer power supply device | |
| CN211377693U (en) | Power transmission line hybrid power supply based on solar energy and induction energy obtaining | |
| CN209571959U (en) | A kind of immersible pump of integrated current transformer for supplying power device | |
| CN205509665U (en) | 3G wireless network video monitoring device power supply | |
| CN205489672U (en) | Mobile power supply | |
| CN205092770U (en) | Power management circuit that steps up | |
| CN207926250U (en) | A kind of synthesis is for electric installation | |
| CN218352259U (en) | Fan control circuit with double power supply modes | |
| CN209767169U (en) | charging structure and dust catcher | |
| CN208996983U (en) | Blowing device | |
| CN209217735U (en) | Charger output voltage auto-adjusting circuit | |
| CN219678149U (en) | Solar energy and CT hybrid energy-taking low-power backup power supply circuit with MPPT | |
| CN207677490U (en) | A kind of adaptive inductive charging mobile power | |
| CN108263240B (en) | Vehicle-mounted charging device of electric automobile and charging method thereof | |
| CN207039960U (en) | A kind of single battery boosting LED drive circuit |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |