CN203056981U - Access control system power supply - Google Patents
Access control system power supply Download PDFInfo
- Publication number
- CN203056981U CN203056981U CN2012206556402U CN201220655640U CN203056981U CN 203056981 U CN203056981 U CN 203056981U CN 2012206556402 U CN2012206556402 U CN 2012206556402U CN 201220655640 U CN201220655640 U CN 201220655640U CN 203056981 U CN203056981 U CN 203056981U
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- power supply
- control system
- system power
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model discloses an access control system power supply which comprises a voltage input end, an alternating current (AC)/AC conversion module, an AC/direct current (DC) conversion module, a voltage output end, and a charge-discharge control circuit. The voltage input end is used for inputting outside AC voltage. The AC/AC conversion module is used for converting the outside AC voltage into AC voltage of the access control system power supply. The AC/DC conversion module is used for converting the AC voltage of the access control system power supply into DC voltage of the access control system power supply and transporting the DC voltage to the voltage output end. The voltage output end is used for supplying the DC voltage to a load. The charge-discharge control circuit is connected between the AC/DC conversion module and a backup battery and used for protecting the backup battery. The access control system power supply carries out pressure regulating through the adoption of a medium frequency transformer and prevents electromagnetic interferences caused by high frequency; the access control system power supply controls the backup battery through the employment of the charge-discharge control circuit and prevents the backup battery from over-discharging; and the access control system power supply prevents dead halts of equipment with the access control system power supply.
Description
Technical field
The utility model belongs to the gate control system field, specifically, relates to a kind of gate control system power supply.
Background technology
The performance of power supply is particularly important in gate control system, and the selection of power supply directly influences the safety of gate control system and stablizes.Gate inhibition's power source special is compared with other power supply, a lot of special requirements are arranged, though provide direct current 12V power supply equally, because of its control electric lock, and electric lock all is made up of inductance coil, so have the big electric current of moment when electric lock starts, and have a big reverse current when the electric lock electric current finishes, this just requires power supply can bear the frequent fluctuation of load.Because the gate inhibition belongs to radio-frequency (RF) identification, require power supply that the noise jamming of less noise clutter and radiation, especially high frequency is arranged simultaneously, can influence the Card Reader distance or cause equipment to crash even burning apparatus.So in the design of gate inhibition's power source special, will take into full account its waveform stabilization, no high-frequency noise, continued power and can bear parameters such as load variations frequently for a long time.
Be illustrated in figure 1 as the circuit diagram of existing a kind of gate control system power supply.This gate control system power supply 100 comprises voltage input end 10, rectification circuit 21, start-up circuit 22, inverter circuit 23, voltage conversion circuit 24, current rectifying and wave filtering circuit 31, voltage stabilizing circuit 61, voltage output end 40; The extraneous alternating voltage that extraneous electrical network provides is generally alternating voltage 220V by voltage input end 10 inputs, then be converted to alternating voltage 12V by rectification circuit 21, start-up circuit 22, inverter circuit 23 and voltage conversion circuit 24 successively, alternating voltage 12V is converted to the direct voltage 12V of this gate control system power supply 100 by current rectifying and wave filtering circuit 31, this direct voltage 12V offers load by voltage output end 40 and uses, and voltage stabilizing circuit 61 is used for the stable constant 12V of being of direct voltage that offers load.This gate control system power supply 100 also comprises backup battery 70, and backup battery 70 is when extraneous grid cut-off, for this gate control system power supply 100 provides power supply.
But, transformer T241 in voltage conversion circuit 24 comprises two primary coils, a secondary coil, the circuit of this gate control system power supply 100 is not worked under the situation of load not having, in other words, the circuit of this gate control system power supply 100 does not have load when not powering, can not continuous firing.And, there is not the circuit of controlling backup battery 70 overdischarge in the circuit of this gate control system power supply 100 yet, cause using the equipment of this gate control system power supply to crash and backup battery 70 overdischarge easily.
The utility model content
In order to solve the problem that above-mentioned prior art exists, the utility model provides a kind of gate control system power supply, and it comprises:
Voltage input end is used for the extraneous alternating voltage of input;
The AC-AC modular converter is for the alternating voltage that described extraneous alternating voltage is converted to described gate control system power supply;
The AC/DC modular converter is used for described alternating voltage is converted to the direct voltage of described gate control system power supply, and described direct voltage is delivered to voltage output end;
Voltage output end is used for providing described direct voltage to load;
Described gate control system power supply also comprises charge-discharge control circuit, and described charge-discharge control circuit is connected in and is used between described AC/DC modular converter and the backup battery described backup battery is protected.
Further, described charge-discharge control circuit comprises relay, triode, selector switch, first diode; The negative terminal of described first diode is connected in first resistance; The base stage of described triode is connected in the anode of described first diode, the electrical ground connection of emitter, and collector electrode is connected in an end of described relay; The other end of described relay is connected in first end of described selector switch and is connected in node A; Second end of described selector switch opens circuit, and the 3rd end is connected in the positive pole of described backup battery.
Further, described triode is sampling voltage and predeterminated voltage relatively, and when described sampling voltage was lower than described predeterminated voltage, described triode drove described relay so that described selector switch disconnects, and then disconnects described backup battery.
Further, described predeterminated voltage is the arbitrary magnitude of voltage between 10V ~ 11V.
Further, described AC-AC modular converter comprises EMI circuit, rectification circuit, start-up circuit, inverter circuit and voltage conversion circuit; Described extraneous alternating voltage is converted to described alternating voltage by described EMI circuit, described rectification circuit, described first protective circuit, described start-up circuit, described inverter circuit and described voltage conversion circuit successively.
Further; described AC-AC modular converter also comprises first protective circuit; described first protective circuit detects the temperature of described gate control system power supply on a preset temperature; the described first protective circuit automatic disconnection and then make described gate control system power supply and described load disconnects, described preset temperature is the arbitrary temperature value between 110 degree ~ 150 degree.
Further, described voltage conversion circuit comprises a transformer, and described transformer comprises three primary coils and a secondary coil; Wherein, an end of first primary coil is connected in node a, and the other end is connected in an end of second primary coil and is connected in node b; The other end of described second primary coil is connected in node c and is connected in node h; One end of the 3rd primary coil is connected in node d, and the other end is connected in node e; One end of described secondary coil is connected in node f, and the other end is connected in node g.
Further, described AC/DC modular converter comprises current rectifying and wave filtering circuit, it is connected in and is used between described AC-AC modular converter and the described load described alternating voltage is converted to described direct voltage, and described direct voltage is delivered to described voltage output end.
Further, described gate control system power supply also comprises Voltage stabilizing module, and described Voltage stabilizing module is connected in and is used for the stable described direct voltage that is delivered to described voltage output end between described AC/DC modular converter and the described voltage output end.
Further; described Voltage stabilizing module comprises voltage stabilizing circuit, voltage regulator circuit and second protective circuit; wherein; described voltage stabilizing circuit is connected between described AC/DC modular converter and the described voltage output end; described voltage regulator circuit is regulated described voltage stabilizing circuit, and described second protective circuit is protected described voltage stabilizing circuit.
According to gate control system power supply of the present utility model, it is in conjunction with the advantage of linear power supply and Switching Power Supply, adopted intermediate frequency transformer to carry out pressure regulation, avoid the electromagnetic interference because of the high frequency generation, adopted charge-discharge control circuit control backup battery, avoid the backup battery overdischarge, and then cause equipment to crash, adopted voltage stabilizing circuit to make the output voltage that exports load to constant, eliminated the noise clutter, increase the EMI circuit simultaneously, prevented the utility network fluctuation to the influence of gate control system power supply and prevent the gate control system power supply to the pollution of utility network, reduced the interference of gate control system power supply when improving the gate control system power source performance.
Description of drawings
Fig. 1 is the circuit diagram of existing gate control system power supply.
Fig. 2 is the framework schematic diagram of the gate control system power supply of the utility model embodiment.
Fig. 3 is the circuit diagram of the gate control system power supply of the utility model embodiment.
Embodiment
In order to set forth technological means and the effect thereof that the utility model is taked better, be described in detail below in conjunction with embodiment of the present utility model and accompanying drawing thereof, wherein, identical label is represented identical parts all the time.
Fig. 2 shows the framework schematic diagram of the gate control system power supply of the utility model embodiment.
With reference to Fig. 2, the gate control system power supply 100 of the utility model embodiment comprises voltage input end 10, is used for the extraneous alternating voltage of input; AC-AC modular converter 20 is used for the extraneous alternating voltage that extraneous electrical network provides is converted to the alternating voltage 12V of gate control system power supply 100; AC/DC modular converter 30 is used for alternating voltage 12V is converted to the direct voltage 12V of gate control system power supply 100, and direct voltage 12V is offered load 80 by voltage output end 40 uses.
AC-AC modular converter 20 comprises rectification circuit 21, start-up circuit 22, inverter circuit 23 and voltage conversion circuit 24; Extraneous alternating voltage is imported by voltage input end 10, and is converted to the alternating voltage 12V of gate control system power supply 100 successively by rectification circuit 21, start-up circuit 22, inverter circuit 23 and voltage conversion circuit 24.
AC-AC modular converter 20 also comprises EMI circuit 25, i.e. electromagnetic interference filter circuit, and EMI circuit 25 is connected between voltage input end 10 and the rectification circuit 21.The high-frequency impulse that EMI circuit 25 main effects in the present embodiment are the extraneous alternating voltages of filtering, avoid high-frequency impulse to the interference of gate control system power supply 100, also play simultaneously and reduce 100 pairs of electromagnetic interference that the extraneous electrical network of extraneous alternating voltage is provided of gate control system power supply.
AC-AC modular converter 20 also comprises first protective circuit 26, and it is connected in voltage conversion circuit 24 and voltage conversion circuit 24 is protected.First protective circuit 26 can be a temperature-control circuit; when the temperature of gate control system power supply 100 reaches preset temperature; first protective circuit 26 disconnects the voltage of input automatically; gate control system power supply 100 is no longer worked, avoid the excessive or short circuit of load 80 to cause gate control system power supply 100 is burnt.In the present embodiment, preset temperature range can be the arbitrary value between 110 degree ~ 150 degree.
AC/DC modular converter 30 comprises current rectifying and wave filtering circuit 31, be connected between voltage conversion circuit 24 and the backup battery 70, be used for alternating voltage 12V is formed direct voltage 12V by rectification and filtering, and direct voltage 12V is offered load 80 uses by voltage output end 40.Backup battery 70 is used for when extraneous grid cut-off, for gate control system power supply 100 provides power supply.
Gate control system power supply 100 also comprises Voltage stabilizing module 60, it is connected between AC/DC modular converter 30 and the voltage output end 40, Voltage stabilizing module 60 is used for the direct voltage that is delivered to voltage output end 40 is carried out voltage stabilizing, makes it be stable at 12V, and then provides constant DC to press 12V to load 80.
Voltage stabilizing module 60 comprises voltage stabilizing circuit 61, voltage regulator circuit 62 and second protective circuit 63; Voltage stabilizing circuit is connected between AC/DC modular converter 30 and the load 80, and 62 pairs of voltage stabilizing circuits 61 of voltage regulator circuit are regulated, and 63 pairs of voltage stabilizing circuits 61 of second protective circuit are protected.Second protective circuit 63 comprises a resettable fuse P, and heating and automatic disconnection when excessive through the electric current of resettable fuse P are when the electric current through resettable fuse P recovers normally then auto-closing.
Gate control system power supply 100 also comprises charge-discharge control circuit 50, and it is connected between AC/DC modular converter 30 and the backup battery 70, is used for preventing backup battery 70 overdischarge.
Below will the circuit structure of above-mentioned gate control system power supply be described in detail.
Fig. 3 is the circuit diagram of the gate control system power supply of the utility model embodiment.
With reference to Fig. 3, this gate control system power supply 100 comprises voltage input end 10, rectification circuit 21, start-up circuit 22, inverter circuit 23, voltage conversion circuit 24, current rectifying and wave filtering circuit 31, voltage stabilizing circuit 61, voltage output end 40; The extraneous alternating voltage that extraneous electrical network provides is by voltage input end 10 inputs and then be converted to alternating voltage 12V by rectification circuit 21, start-up circuit 22, inverter circuit 23 and voltage conversion circuit 24 successively, alternating voltage 12V is converted to the direct voltage 12V of this gate control system power supply 100 by current rectifying and wave filtering circuit 31, this direct voltage 12V offers load by voltage output end 40 and uses, and voltage stabilizing circuit 61 is used for the stable constant 12V of being of direct voltage that offers load.
This gate control system power supply 100 also comprises backup battery 70, and backup battery 70 is when extraneous grid cut-off, for this gate control system power supply 100 provides power supply.
This gate control system power supply 100 also comprises EMI circuit 25, i.e. electromagnetic interference filter circuit, and EMI circuit 25 is connected between voltage input end 10 and the rectification circuit 21.The high-frequency impulse that EMI circuit 25 main effects in the present embodiment are the extraneous alternating voltages of filtering, avoid high-frequency impulse to the interference of gate control system power supply 100, also play simultaneously and reduce 100 pairs of electromagnetic interference that the extraneous electrical network of extraneous alternating voltage is provided of gate control system power supply.
This gate control system power supply 100 also comprises first protective circuit 26, and it is connected between rectification circuit 21 and the start-up circuit 22 gate control system power supply 100 is protected.First protective circuit 26 can be a temperature-control circuit; when the temperature of gate control system power supply 100 reaches preset temperature; first protective circuit 26 disconnects the voltages of input automatically, and gate control system power supply 100 is no longer worked, and avoids the excessive or short circuit of load to cause gate control system power supply 100 is burnt.In the present embodiment, preset temperature range is 110 degree ~ 150 degree.
This gate control system power supply 100 also comprises voltage regulator circuit 62 and second protective circuit 63; 62 pairs of voltage stabilizing circuits 61 of voltage regulator circuit are regulated, and 63 pairs of voltage stabilizing circuits 60 of second protective circuit are protected.Second protective circuit 63 comprises a resettable fuse P, and heating and automatic disconnection when excessive through the electric current of resettable fuse P are when the electric current through resettable fuse P recovers normally then auto-closing.
In the present embodiment, the transformer of original two primary coils in the voltage conversion circuit 24, a secondary coil has been become the transformer T241 that three primary coils among the utility model embodiment are respectively L1, L2, L3 and a secondary coil L4, wherein, the end of the first primary coil L1 is connected in node a, and the other end is connected in the end of the second primary coil L2 and is connected in node b; The other end of the second primary coil L2 is connected in node c and is connected in node h; The end of the 3rd primary coil L3 is connected in node d, and the other end is connected in node e; The end of secondary coil L4 is connected in node f, and the other end is connected in node g.Make the circuit of gate control system power supply of the utility model embodiment not have the situation of load also can work by increasing a primary coil, the circuit that is to say the gate control system power supply of the utility model embodiment also has load, the work that can continue when not powering.In the present embodiment, preferably, transformer T241 is an intermediate frequency transformer.
In the present embodiment, this gate control system power supply 100 also comprises charge-discharge control circuit 50, it is connected between the positive pole of first resistance R 1 and backup battery 70, and specifically, charge-discharge control circuit 50 comprises relay K, triode Q, selector switch S, the first diode D1; The negative terminal of the first diode D1 is connected in first resistance R 1; The base stage of triode Q is connected in the anode of the first diode D1, the electrical ground connection of emitter, and collector electrode is connected in an end of relay K; The other end of relay K is connected in first end of selector switch S and is connected in node A; Second end of selector switch S opens circuit, and the 3rd end is connected in the positive pole of backup battery 70.
When the circuit running of the gate control system power supply of present embodiment, triode Q takes out voltage and compares as sampling voltage and a predeterminated voltage from the circuit that it connects, when sampling voltage is lower than predeterminated voltage, triode Q drives relay K so that first end of selector switch S and the second end conducting, and then backup battery 70 is disconnected, avoid backup battery 70 overdischarge and cause the equipment of the gate control system power supply that uses present embodiment to crash.In the present embodiment, predeterminated voltage can be the arbitrary value between 10V ~ 11V.
According to gate control system power supply of the present utility model, it is in conjunction with the advantage of linear power supply and Switching Power Supply, adopted intermediate frequency transformer to carry out pressure regulation, avoid the electromagnetic interference because of the high frequency generation, this intermediate frequency transformer has three primary coils, a secondary coil, make the circuit of gate control system power supply of the present utility model also can work under the situation of load not having by increasing a primary coil, the circuit that is to say gate control system power supply of the present utility model also has load, the work that can continue when not powering; Adopted charge-discharge control circuit control backup battery, avoid the backup battery overdischarge, adopted voltage stabilizing circuit to make the output voltage that exports load to constant, eliminated the noise clutter, increased the EMI circuit simultaneously, prevent the utility network fluctuation to the influence of gate control system power supply and prevent the gate control system power supply to the pollution of utility network, reduced the interference of gate control system power supply when improving the gate control system power source performance.
Though the utility model is specifically described with reference to its exemplary embodiment and is shown, but will be understood by those skilled in the art that, under the situation that does not break away from the spirit and scope of the present utility model that are defined by the claims, can carry out the various changes of form and details to it.
Claims (10)
1. gate control system power supply, it comprises:
Voltage input end is used for the extraneous alternating voltage of input;
The AC-AC modular converter is for the alternating voltage that described extraneous alternating voltage is converted to described gate control system power supply;
The AC/DC modular converter is used for described alternating voltage is converted to the direct voltage of described gate control system power supply, and described direct voltage is delivered to voltage output end;
Voltage output end is used for providing described direct voltage to load;
It is characterized in that described gate control system power supply also comprises charge-discharge control circuit, described charge-discharge control circuit is connected in and is used between described AC/DC modular converter and the backup battery described backup battery is protected.
2. gate control system power supply according to claim 1 is characterized in that, described charge-discharge control circuit comprises relay, triode, selector switch, first diode; The negative terminal of described first diode is connected in first resistance; The base stage of described triode is connected in the anode of described first diode, the electrical ground connection of emitter, and collector electrode is connected in an end of described relay; The other end of described relay is connected in first end of described selector switch and is connected in node A; Second end of described selector switch opens circuit, and the 3rd end is connected in the positive pole of described backup battery.
3. gate control system power supply according to claim 2, it is characterized in that described triode is sampling voltage and predeterminated voltage relatively, when described sampling voltage is lower than described predeterminated voltage, described triode drives described relay so that described selector switch disconnects, and then disconnects described backup battery.
4. gate control system power supply according to claim 3 is characterized in that, described predeterminated voltage is the arbitrary magnitude of voltage between 10V ~ 11V.
5. according to each described gate control system power supply of claim 1 to 4, it is characterized in that described AC-AC modular converter comprises EMI circuit, rectification circuit, start-up circuit, inverter circuit and voltage conversion circuit; Described extraneous alternating voltage is converted to described alternating voltage by described EMI circuit, described rectification circuit, described first protective circuit, described start-up circuit, described inverter circuit and described voltage conversion circuit successively.
6. gate control system power supply according to claim 5; it is characterized in that; described AC-AC modular converter also comprises first protective circuit; described first protective circuit detects the temperature of described gate control system power supply on a preset temperature; the described first protective circuit automatic disconnection and then make described gate control system power supply and described load disconnects, described preset temperature is the arbitrary temperature value between 110 degree ~ 150 degree.
7. gate control system power supply according to claim 5 is characterized in that, described voltage conversion circuit comprises a transformer, and described transformer comprises three primary coils and a secondary coil; Wherein, an end of first primary coil is connected in node a, and the other end is connected in an end of second primary coil and is connected in node b; The other end of described second primary coil is connected in node c and is connected in node h; One end of the 3rd primary coil is connected in node d, and the other end is connected in node e; One end of described secondary coil is connected in node f, and the other end is connected in node g.
8. gate control system power supply according to claim 1, it is characterized in that, described AC/DC modular converter comprises current rectifying and wave filtering circuit, it is connected in and is used between described AC-AC modular converter and the described load described alternating voltage is converted to described direct voltage, and described direct voltage is delivered to described voltage output end.
9. according to claim 1 or 8 described gate control system power supplys, it is characterized in that, described gate control system power supply also comprises Voltage stabilizing module, and described Voltage stabilizing module is connected in and is used for the stable described direct voltage that is delivered to described voltage output end between described AC/DC modular converter and the described voltage output end.
10. gate control system power supply according to claim 9; it is characterized in that; described Voltage stabilizing module comprises voltage stabilizing circuit, voltage regulator circuit and second protective circuit; wherein; described voltage stabilizing circuit is connected between described AC/DC modular converter and the described voltage output end; described voltage regulator circuit is regulated described voltage stabilizing circuit, and described second protective circuit is protected described voltage stabilizing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206556402U CN203056981U (en) | 2012-12-03 | 2012-12-03 | Access control system power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206556402U CN203056981U (en) | 2012-12-03 | 2012-12-03 | Access control system power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203056981U true CN203056981U (en) | 2013-07-10 |
Family
ID=48739898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206556402U Expired - Fee Related CN203056981U (en) | 2012-12-03 | 2012-12-03 | Access control system power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203056981U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036450A (en) * | 2012-12-03 | 2013-04-10 | 王大鹏 | Access control system power supply |
| CN106774589A (en) * | 2016-12-29 | 2017-05-31 | 武汉盛帆电子股份有限公司 | Stable-pressure device and guard method, communication bus supply unit |
-
2012
- 2012-12-03 CN CN2012206556402U patent/CN203056981U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036450A (en) * | 2012-12-03 | 2013-04-10 | 王大鹏 | Access control system power supply |
| CN103036450B (en) * | 2012-12-03 | 2016-01-20 | 王大鹏 | Gate control system power supply |
| CN106774589A (en) * | 2016-12-29 | 2017-05-31 | 武汉盛帆电子股份有限公司 | Stable-pressure device and guard method, communication bus supply unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gee et al. | A superconducting magnetic energy storage-emulator/battery supported dynamic voltage restorer | |
| CN102742138B (en) | AC-DC converter and AC-DC conversion method | |
| CN105119388B (en) | The Current Mutual Inductance draw-out power supply of wide-range current work | |
| CN100507590C (en) | Multiple input path modular high frequency isolation single phase power feedback type electronic load | |
| CN109895640A (en) | A kind of electric car wireless charging two stage control system and control method | |
| US20140087215A1 (en) | Temperature controlling system and method of battery | |
| Husev et al. | Novel concept of solar converter with universal applicability for DC and AC microgrids | |
| CN109560578A (en) | A kind of device and method taking energy from ultra-high-tension power transmission line | |
| EP3647108A1 (en) | Charging assembly for motor vehicles with multiple energy sources | |
| Nam et al. | Novel unity-gain frequency tracking control of series–series resonant converter to improve efficiency and receiver positioning flexibility in wireless charging of portable electronics | |
| US20220231509A1 (en) | Vehicle-grid-home power interface | |
| Ye et al. | Impedance modeling and verification of a dual active bridge (DAB) DC/DC converter enabled DC microgrid in FREEDM system | |
| US8773878B2 (en) | Three-phase reactor power saving device | |
| CN203056981U (en) | Access control system power supply | |
| Samanta et al. | Development of a novel controller for DC-DC boost converter for DC Microgrid | |
| CN204967289U (en) | Electric current mutual inductance of wide current range work is got can power | |
| CN111082536A (en) | Stable high-voltage induction electricity taking device and method | |
| CN103036450B (en) | Gate control system power supply | |
| CN103296747A (en) | Uninterrupted power system | |
| CN102882393B (en) | Power supply device for converter valve of static VAR generator | |
| CN202663316U (en) | Circuit with three common-grounded power supplies of high voltage alternating current, low voltage alternating current and low voltage direct current | |
| CN105576988B (en) | A kind of coupling energy taking power supply adapting to the work of wide dynamic range bus current | |
| CN205283408U (en) | Motor test electrical power generating system | |
| CN209250492U (en) | A kind of switch power module | |
| CN204179954U (en) | A kind of portable electronic voltage regulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20151203 |
|
| EXPY | Termination of patent right or utility model |