CN202135235U - Low power consumption standby circuit and TV - Google Patents
Low power consumption standby circuit and TV Download PDFInfo
- Publication number
- CN202135235U CN202135235U CN201120243961U CN201120243961U CN202135235U CN 202135235 U CN202135235 U CN 202135235U CN 201120243961 U CN201120243961 U CN 201120243961U CN 201120243961 U CN201120243961 U CN 201120243961U CN 202135235 U CN202135235 U CN 202135235U
- Authority
- CN
- China
- Prior art keywords
- circuit
- power
- standby
- power consumption
- low
- 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
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model discloses a low power consumption standby circuit and a TV, comprising a remote control receiving head, a processor used for receiving startup instructions when standby, a resistance-capacitance voltage reduction circuit and a switch circuit. The resistance-capacitance voltage reduction circuit is connected with the input end of an AC power supply to transform the inputted AC power supply into a low-voltage DC power supply and then output to the power supply ends of the processor and the remote control receiving head, and the processor controls the switch circuit connected between the AC power supply input end and a main power supply circuit to turn-on or turn-off according to the received startup/standby instructions. The standby circuit of the utility model utilizes some simple devices to transform the AC power supply inputted in a system into a standby power supply directly to supply loads still needing to work when standby with power, so that an original main power supply circuit in the system can be cut-off thoroughly, thereby reducing the whole power consumption substantially and solving the serious standby power consumption problem of an electronic system effectively. The low power consumption standby circuit is especially suitable for being used in TV products having relative fierce price competitions.
Description
Technical field
The utility model belongs to the stand-by circuit technical field, specifically, relates to a kind of television set that reduces the control circuit of stand-by power consumption and adopt said low-power consumption standby circuit design.
Background technology
In present tv product, generally all be provided with power panel and mainboard, power panel is used for electric main with the outside and converts that each is main board power supply with the required operating voltage of electric loading on the mainboard to.When television set is in holding state; In order to make television set can receive the start-up command that remote controller or keypad send; Realize the accurate startup of television set, need master chip or the special standby MCU that is provided with on the TV SKD still to be in the state of working on power.This just requires the partial circuit (for example filter circuit, rectification circuit, standby power circuit etc.) on the TV set power plate to work on; Produce the required supply power voltage of master chip or standby MCU work, will inevitably on power panel, produce the part energy loss thus.
Because idling consumption mainly appears on mainboard and the power panel; In order to reduce stand-by power consumption; Satisfy the designing requirement of tv product energy-conserving and environment-protective, therefore, the solution that adopts at present usually is load when as far as possible reducing standby on the mainboard or the efficient that improves power panel; But complete machine stand-by power consumption minimum also can only be accomplished about 0.5W, and is still desirable not to the utmost aspect the inhibition stand-by power consumption.
Summary of the invention
The utility model has proposed a kind of low-power consumption standby circuit in order to solve the existing big problem of stand-by circuit power consumption, to realize effective control of complete machine stand-by power consumption.
For solving the problems of the technologies described above, the utility model adopts following technical scheme to be achieved:
A kind of low-power consumption standby circuit comprises that remote control is used to receive processor, resistance-capacitance depressurization circuit and a switching circuit of start-up command when receiving head, standby; Said resistance-capacitance depressurization circuit connects ac power input end, converts the AC power of importing to feeder ear that low-voltage dc power supply exports said processor and remote control reception head to; Said processor is according to switching circuit conducting or the shutoff of start/standby command control connection between ac power input end and main power circuit that receives.
For stand-by power consumption is effectively controlled, should adopt few components and parts of trying one's best to make up described resistance-capacitance depressurization circuit, in resistance-capacitance depressurization circuit of the present invention, include capacitor, resistance, voltage-stabiliser tube and rectifier diode; After said capacitor and the resistance parallel connection; One end connects the live wire of ac power input end; The other end is connected with the negative electrode of voltage-stabiliser tube and the anode of rectifier diode respectively, and the anode of said voltage-stabiliser tube connects zero line, and the negative electrode of rectifier diode connects the feeder ear of said processor and remote control reception head.
Wherein, the appearance value of said capacitor can be confirmed according to a said processor and a remote control reception desired input current size.
Preferably, can also further series limiting resistor in the live wire of said ac power input end.
Further; Between the zero line of the negative electrode of said rectifier diode and ac power input end, also be connected with filter capacitor parallel with one another and voltage stabilizing didoe, be used for handling doing further filtering voltage regulation through the low-voltage dc power supply of said resistance-capacitance depressurization circuit output.
A kind of decision design mode as said switching circuit; In said switching circuit, include a relay; The normally opened contact of said relay is connected between said ac power input end and the main power circuit, and the power circuit of relay coil is break-make under the control of said processor.
Further; Be parallel with a storage capacitor at the two ends of said relay coil; One end of said relay coil connects the negative electrode of second rectifier diode on the one hand; The anode of said second rectifier diode connects the zero line of ac power input end; The live wire that is connected said ac power input end on the other hand through the parallel branch of resistance and electric capacity, the other end of said relay coil connect described processor or through a switching device ground connection, the control utmost point of said switching device receives the break-make control signal that said processor sends.
Preferably, said switching device is a controllable silicon, and said silicon controlled anode connects relay coil, minus earth, and the control utmost point connects the break-make control signal output ends of said processor.
Further, also be parallel with the electric capacity that is used to suppress impulse current at the two ends of said second divider resistance.
Further again, said processor is a low-power consumption MCU, connects the output that said remote control receives head, when receiving the start-up command of remote control reception head output, controls said switching circuit conducting, and ac power input end is communicated with main power circuit; The remote control command of output output that receives head through said remote control is after photoelectric isolating circuit is handled; Transfer to system's master chip; Said system master chip connects described MCU, and the standby command that receives is transferred to MCU, and then controls said switching circuit through MCU and turn-off; Cut off the Alternating Current Power Supply of main power circuit, significantly to reduce stand-by power consumption.
Based on above-mentioned low-power consumption standby circuit structure; The utility model provides a kind of television set that adopts the design of said low-power consumption standby circuit again, comprises ac power input end, is used to receive processor, resistance-capacitance depressurization circuit and a switching circuit of start-up command when each provides main power circuit and the remote control of operating voltage to receive head, standby with electric loading on the TV SKD; Said resistance-capacitance depressurization circuit connects ac power input end, converts the AC power of importing to feeder ear that low-voltage dc power supply exports said processor and remote control reception head to; Said processor is according to switching circuit conducting or the shutoff of start/standby command control connection between ac power input end and main power circuit that receives.
Compared with prior art; The advantage and the good effect of the utility model are: the AC power that the simple several devices of the stand-by circuit utilization of the utility model directly will be input to system still needs the electric of work when converting standby power for standby to; Original main power circuit in the thoroughly cut-out system thus; Realize the significantly reduction of Overall Power Consumption, thereby solved the serious problem of electronic system stand-by power consumption effectively, on performance and cost, have competitiveness more.Simultaneously, also for the Opportunity awaiting control for linear problem that solves electric equipment provides a kind of good mentality of designing, be particularly useful in the fierce relatively television product of price competition.
After the detailed description in conjunction with advantages the utility model execution mode, other characteristics of the utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the power circuit design principle block diagram of a kind of embodiment of existing TV set power plate;
Fig. 2 is the circuit theory diagrams of a kind of embodiment of the low-power consumption standby circuit that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done explanation in further detail.
Embodiment one, and present embodiment is that example describes with the tv product.
On existing TV set power plate, its power circuit is mainly by chief components such as ac power input end, filter circuit, rectification circuit, Switching Power Supply, power management chip and standby power circuit, referring to shown in Figure 1.Outside electric main is after ac power input end inserts; At first carry out Filtering Processing through filter circuit; Transfer to full bridge rectifier then and carry out the rectifying conversion of AC power to DC power supply; The DC power supply of output generates the required operating voltage Vcc of power management chip through the standby power circuit on the one hand, and mainboard is attend system's master chip (perhaps standby MCU) and the required standby voltage Vstb of other stand-by circuits (receiving first-class such as remote control); For Switching Power Supply primary voltage is provided on the other hand.Said Switching Power Supply is under the control action of power management chip; Primary voltage is converted to the direct voltage of the different amplitudes of multichannel; Be that each is the system's master chip on the mainboard, sound channel, display screen and the power supply of other functional circuits with each required road operating voltage of electric loading on the mainboard.System's master chip is controlled the operation of function corresponding circuit according to user's remote control command or key command through its each road output channel, with response user's operation after getting into normal operating conditions.
In order to make television set when the standby; System's master chip or standby MCU can receive remote-controlled start-up instruction and button start-up command; To control complete machine start work exactly; Must make system's master chip or standby MCU be in the state of working on power all the time, its supply power voltage is provided by the standby voltage Vstb of power panel output.In order to obtain described standby voltage Vstb, just require filter circuit, rectification circuit and standby power circuit on the power panel when standby, still to be in running status, just produced bigger power loss thus, cause the complete machine stand-by power consumption to be difficult to reach below the 0.1W.
In order to reduce the stand-by power consumption of power panel; Present embodiment utilizes several simple components and parts to design stand-by circuit again on power panel; Directly obtain AC power and convert standby voltage Vstb to from ac power input end, the electric that need move during for standby can thoroughly be turned off on original power panel the filter circuit that produces big stand-by power consumption and rectification circuit (at this moment thus; The standby power circuit need not to be provided with), the stand-by power consumption of complete machine is effectively controlled.
Be example below with the television set, come to set forth in detail the concrete composition structure and the operation principle thereof of said low-power consumption standby circuit through a concrete embodiment.
Referring to shown in Figure 2, the stand-by circuit of present embodiment mainly is made up of resistance-capacitance depressurization circuit A and switching circuit K1.Wherein, The input of resistance-capacitance depressurization circuit A directly connects the ac power input end AC-INPUT of power panel; The electric main of outside is directly changed into low-voltage dc power supply VCC, and the processor that is used to receive start-up command when receiving an X3 and standby for the remote control in the system provides standby voltage.Said processor can be the master chip of system for TV set, also can be a low-power consumption microprocessor MCU (being standby MCU) who is exclusively used in Opportunity awaiting control for linear.Consider the power consumption of the stand-by power consumption of master chip much larger than standby MCU, therefore, present embodiment preferably adopts standby MCU to carry out the design of stand-by circuit as described processor.Said start-up command receives an X3 by remote control and generates according to the remote signal coding that receives, and the output OUT that receives an X3 through remote control transfers to wherein one road I/O mouth of standby MCU, such as I/O3.Standby MCU is after receiving start-up command; Control connection is in the switching circuit K1 conducting between the main power circuit on ac power input end AC-INPUT and the power panel; Thereby make the main power circuit operation that powers on; Each makes machine system start operation with the required operating voltage of electric loading on the conversion output mainboard.
When the user presses the standby button on remote controller or the keypad; In order to make each functional circuit capable again its power supply that cuts off after stable entering closed condition on the mainboard; Present embodiment is connected standby MCU with the system master chip, the standby command of receiving system master chip output, and then control said switching circuit K1 and turn-off; Thoroughly turn off the main power circuit on the power panel, to reach the purpose that reduces stand-by power consumption.
In the present embodiment, said resistance-capacitance depressurization circuit A can be made up of resistance R 2, decompression capacitor C2, voltage-stabiliser tube V3 and rectifier diode V1, and is as shown in Figure 2.Wherein, After said resistance R 2 and capacitor C2 parallel connection; Be connected in the live wire of alternating current input power supplying; Utilize said capacitor C2 that the electric current of input is limited,, make size of current can just satisfy the requirement of back level load (being that standby MCU and remote control receive an X3) input current through capacitor C2 output through the appearance value of choose reasonable capacitor C2; Cooperate voltage-stabiliser tube V3 to realize of the conversion of high-voltage alternating civil power again, carry out halfwave rectifier through rectifier diode V1 then, be rectified into low-voltage dc power supply VCC, export the feeder ear VIN that standby MCU and remote control receive an X3 to low-voltage alternating current power supply.Specifically; The end of said resistance R 2 with the parallel branch of capacitor C2 composition is connected on the live wire of ac power input end AC-INPUT; The other end is connected with the negative electrode of voltage-stabiliser tube V3 and the anode of rectifier diode D1 respectively; The anode of said voltage-stabiliser tube V3 connects the zero line of ac power input end AC-INPUT, and the negative electrode of rectifier diode V1 connects the feeder ear VIN of a said standby MCU and a remote control reception X3.Be connected in parallel on the charge discharging resisting resistance of the resistance R 2 at capacitor C2 two ends for capacitor C2 behind the power cutoff.Thus, can realize the conversion output of alternating current input power supplying, make stand-by power consumption reduce greatly to direct current standby voltage through several simple components and parts.
In said resistance-capacitance depressurization circuit A, current-limiting resistance R1 can also be set further; As shown in Figure 2; Between the parallel branch that the live wire that is connected on ac power input end AC-INPUT and said resistance R 2 and capacitor C2 form, to be used for that the AC power of input is carried out the current limliting dividing potential drop.
More stable in order to make through the DC power supply VCC of resistance-capacitance depressurization circuit A output; Can also further parallelly connected filter capacitor C5 between the negative electrode of rectifier diode V1 and zero line, C and voltage stabilizing didoe V4; As shown in Figure 2, with the burr in the filtering DC power supply VCC waveform.Certainly, present embodiment does not specifically limit this.
For switching circuit K1, present embodiment preferably adopts relay design to realize, and is as shown in Figure 2.The normally opened contact of relay K 1 is connected between ac power input end AC-INPUT and the main power circuit; Utilize the break-make electricity condition of standby MCU control relay K1 coil; And then the normally opened contact adhesive of control relay K1 or disconnection, make circuit system get into start or holding state.
The power circuit of relay K 1 coil can adopt multiple design; For example: can directly an end of relay K 1 coil be connected the output of said resistance-capacitance depressurization circuit A, utilize the DC power supply VCC of resistance-capacitance depressurization circuit A output to be relay K 1 coil power supply.The other end of relay K 1 coil is connected wherein one road I/O mouth of standby MCU, when said I/O mouth is changed to low level, have electric current to flow through in relay K 1 coil, its normally opened contact of adhesive; And when said I/O mouth was changed to high level, no current flow through in relay K 1 coil, and its normally opened contact breaks off, and just can realize the break-make control between main power circuit and the ac power input end AC-INPUT thus.Certainly; The other end of said relay K 1 coil also can adopt through a switching device earthing mode and carry out circuit design; The control utmost point of said switching device is connected standby MCU; Control said switching device break-make through standby MCU, can reach the purpose of design of said relay K 1 break-make of control equally.
A kind of preferred design as present embodiment; The power circuit of said relay K 1 coil preferably adopts the second resistance-capacitance depressurization circuit and storage capacitor C4 and the controllable silicon V5 establishment realization of being made up of the second rectifier diode V2, resistance R 3, capacitor C 1, and is as shown in Figure 2.The zero line that the anode of the said second rectifier diode V2 is connected ac power input end AC-INPUT; Negative electrode connects an end of relay K 1 coil, and is connected the live wire of ac power input end AC-INPUT through the parallel branch of being made up of said resistance R 3 and capacitor C 1; The other end of relay K 1 coil connects the anode of controllable silicon V5, the minus earth of controllable silicon V5, and the control utmost point such as the I/O4 mouth, receives the break-make control signal that standby MCU sends through the break-make control signal output ends that current-limiting resistance R5 connects standby MCU.Said storage capacitor C4 is connected in parallel on the two ends of relay K 1 coil.When system was in holding state, standby MCU was through its I/O4 output low level, and control controllable silicon V5 ends; The power circuit of block system relay K1 coil; The normally opened contact of relay K 1 is broken off, turn off the main power circuit on the power panel, to reduce the stand-by power consumption of complete machine.And receive after remote control receives the start-up command that an X3 sends as standby MCU; Send high level signal through its I/O4, control controllable silicon V5 conducting, and then the power circuit of connection relay K 1 coil; Make its normally opened contact adhesive; And then the main power circuit on the control power panel gets into the running status that powers on, and is each the electricity consumption electric on the mainboard, makes system get into the start running status.
The I/O1 mouth of standby MCU connects indicator light VD1 through current-limiting resistance R11, through control indicator light VD1 light on and off, comes indication mechanism present located state, i.e. holding state or open state.
Certainly; The coil of said relay K 1 also can directly connect standby MCU or other switching devices through except that controllable silicon V5 (such as transistor etc.) ground connection; To realize the break-make electric control of standby MCU to relay K 1 coil, present embodiment is not limited in above giving an example.
Behind system boot, after receiving a remote control command of X3 coding output (form with pulse train occurs usually) and can handle through photoelectric isolating circuit through remote control, transferring to needs to receive among the device X4 of remote control command, such as system's master chip of television set.As shown in Figure 2, the output OUT that remote control is received an X3 connects the base stage of a NPN type triode V6 through current-limiting resistance R9, and the collector electrode of said triode V6 connects DC power supply VCC, and emitter is through the light-emitting diode ground connection of resistance R 4 through optocoupler N1; The illuminated triode connected system master chip of said optocoupler N1 is sent to system's master chip with the remote control pulse train, identifies user's button operation with parsing.
The AC power that stand-by circuit of the present invention uses very simple several devices directly will be linked into system converts standby MCU to and remote control receives a needed supply power voltage; Other circuit when standby on the power panel cut off through switching circuit; All do not work; Greatly reduce the stand-by power consumption of complete machine thus, can reach the design object of tv product complete machine stand-by power consumption fully less than 0.1W.
Certainly, said low-power consumption standby circuit is applicable to that equally also present embodiment does not specifically limit this in other electronic equipments except that television set.
Should be noted that; Above-mentioned explanation is not to be the restriction to the utility model; The utility model also is not limited in above-mentioned giving an example; Variation, remodeling, interpolation or replacement that those skilled in the art are made in the essential scope of the utility model also should belong to the protection range of the utility model.
Claims (10)
1. a low-power consumption standby circuit is characterized in that: comprise that remote control is used to receive processor, resistance-capacitance depressurization circuit and a switching circuit of start-up command when receiving head, standby; Said resistance-capacitance depressurization circuit connects ac power input end, converts the AC power of importing to feeder ear that low-voltage dc power supply exports said processor and remote control reception head to; Said processor is according to switching circuit conducting or the shutoff of start/standby command control connection between ac power input end and main power circuit that receives.
2. low-power consumption standby circuit according to claim 1 is characterized in that: in said resistance-capacitance depressurization circuit, include capacitor, resistance, voltage-stabiliser tube and rectifier diode; After said capacitor and the resistance parallel connection; One end connects the live wire of ac power input end; The other end is connected with the negative electrode of voltage-stabiliser tube and the anode of rectifier diode respectively, and the anode of said voltage-stabiliser tube connects zero line, and the negative electrode of rectifier diode connects the feeder ear of said processor and remote control reception head.
3. low-power consumption standby circuit according to claim 2 is characterized in that: the appearance value of said capacitor is confirmed according to a said processor and a remote control reception desired input current.
4. low-power consumption standby circuit according to claim 2 is characterized in that: in the live wire of said ac power input end, also be in series with current-limiting resistance.
5. low-power consumption standby circuit according to claim 2 is characterized in that: between the zero line of the negative electrode of said rectifier diode and ac power input end, also be connected with filter capacitor parallel with one another and voltage stabilizing didoe.
6. according to each described low-power consumption standby circuit in the claim 1 to 5; It is characterized in that: in said switching circuit, include a relay; The normally opened contact of said relay is connected between said ac power input end and the main power circuit, and the power circuit of relay coil carries out break-make control by said processor.
7. low-power consumption standby circuit according to claim 6; It is characterized in that: be parallel with a storage capacitor at the two ends of said relay coil; One end of said relay coil connects the negative electrode of second rectifier diode on the one hand; The anode of said second rectifier diode connects the zero line of ac power input end; The live wire that is connected said ac power input end on the other hand through the parallel branch of resistance and electric capacity, the other end of said relay coil connect described processor or through a switching device ground connection, the control utmost point of said switching device receives the break-make control signal that said processor sends.
8. low-power consumption standby circuit according to claim 7 is characterized in that: said switching device is a controllable silicon, and said silicon controlled anode connects relay coil, minus earth, and the control utmost point connects the break-make control signal output ends of said processor.
9. low-power consumption standby circuit according to claim 6 is characterized in that: said processor is a low-power consumption MCU, connects the output that said remote control receives head; The remote control command of output output that receives head through said remote control transfers to system's master chip after photoelectric isolating circuit is handled, said system master chip connects described MCU, and the standby command that receives is transferred to MCU.
10. television set comprises ac power input end and for each provides main power circuit of operating voltage on the TV SKD with electric loading; It is characterized in that: in said television set, also be provided with like the described low-power consumption standby circuit of each claim in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120243961U CN202135235U (en) | 2011-07-12 | 2011-07-12 | Low power consumption standby circuit and TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120243961U CN202135235U (en) | 2011-07-12 | 2011-07-12 | Low power consumption standby circuit and TV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202135235U true CN202135235U (en) | 2012-02-01 |
Family
ID=45523991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120243961U Expired - Fee Related CN202135235U (en) | 2011-07-12 | 2011-07-12 | Low power consumption standby circuit and TV |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202135235U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103246208A (en) * | 2012-02-09 | 2013-08-14 | 苏州三星电子有限公司 | Electric appliance controller |
| CN102256087B (en) * | 2011-07-12 | 2016-09-07 | 青岛海信电器股份有限公司 | A kind of low-power consumption standby circuit and television set |
| CN112083794A (en) * | 2020-09-11 | 2020-12-15 | 深圳市当智科技有限公司 | Power management circuit, electronic product and control method |
-
2011
- 2011-07-12 CN CN201120243961U patent/CN202135235U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256087B (en) * | 2011-07-12 | 2016-09-07 | 青岛海信电器股份有限公司 | A kind of low-power consumption standby circuit and television set |
| CN103246208A (en) * | 2012-02-09 | 2013-08-14 | 苏州三星电子有限公司 | Electric appliance controller |
| CN112083794A (en) * | 2020-09-11 | 2020-12-15 | 深圳市当智科技有限公司 | Power management circuit, electronic product and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102256087A (en) | Low-power consumption standby circuit and television | |
| CN202121292U (en) | Power failure protective circuit and power supply circuit | |
| CN101262556B (en) | A STB with low-power consumption standby | |
| CN104135061A (en) | Direct current supply system with leakage protection | |
| CN102148529A (en) | Control device and control method thereof for intelligently supplying power to circuit breaker control unit | |
| CN104184341B (en) | Power supply device | |
| CN202135235U (en) | Low power consumption standby circuit and TV | |
| CN202190212U (en) | Overvoltage control circuit, low-power-consumption power circuit and television | |
| CN201994717U (en) | Control device for supplying power to breaker control units | |
| CN203608098U (en) | Power supply device | |
| CN101315549A (en) | Solution scheme for naught power consumption stand-by after manual, remote control and network power-off | |
| CN201576957U (en) | Variable frequency power supply control system of low-voltage motor | |
| CN102299670A (en) | Centralized control cabinet for oil pumping unit well field | |
| CN201127073Y (en) | Capacitance voltage-distributing isolated form low-power consumption standby power supply | |
| CN202696482U (en) | Power supply circuit for leakage circuit breaker | |
| CN205123578U (en) | Modular integrated integration source transformation ware of multiplexed output | |
| CN206894325U (en) | A kind of control circuit of new low standby power loss | |
| CN205304589U (en) | Power supply control circuit | |
| CN201041956Y (en) | Power supply circuit for control circuit in high voltage device | |
| CN210041671U (en) | Isolated AC-DC power supply for high speed motorized spindle drive | |
| CN203691272U (en) | Single/three-phase wide range input switch power supply | |
| CN202797903U (en) | Automatic discharging device of reactive compensation capacitor | |
| CN202135046U (en) | Frequency converter control device | |
| CN205544951U (en) | Low no -load loss's transformer system | |
| CN101604919A (en) | A kind of synchronous rectification Buck-Flyback converter |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120201 Termination date: 20190712 |