CN204669074U - A kind of power transfer device - Google Patents
A kind of power transfer device Download PDFInfo
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- CN204669074U CN204669074U CN201520408862.8U CN201520408862U CN204669074U CN 204669074 U CN204669074 U CN 204669074U CN 201520408862 U CN201520408862 U CN 201520408862U CN 204669074 U CN204669074 U CN 204669074U
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- power source
- main power
- power supply
- switching tube
- outlet line
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Abstract
The utility model relates to a kind of power transfer device, comprise main power source, accessory power supply, control device and switching tube, accessory power supply is exported by switching tube and is connected on the outlet line of main power source, the control output end of main power source is by control device control connection switching tube, and according to the state control switch pipe conducting of main power source whether control device is used for.Use switching tube as the switch element of electrical source exchange, switching tube volume is very little, especially in integrated circuits, the switching tube of small size can use in very little environment, can not bring and use circumscribed problem, in addition because of volume, switching tube realizes switch according to control signal, it is not mechanical switch, avoids the problems such as the adhesion brought when switch, ensure that power supply effectively switches.
Description
Technical field
The utility model relates to a kind of power transfer device.
Background technology
Be illustrated in figure 1 traditional power supply switch circuit, main power source and stand-by power supply are merely able to there is one for load supplying, and under normal circumstances, main power source is load supplying.When primary power source de-energizes, relay is from electricly becoming dead electricity, and the electric shock of relay is allocated to stand-by power supply, and stand-by power supply is load supplying, realizes the switching of power supply.In this power supply switch circuit, because the volume of relay is comparatively large, this power supply switch circuit cannot use in subenvironment, and in addition, the contact of relay in use, especially when contact action, easily sticks together, and effectively can not carry out electrical source exchange.
Utility model content
The purpose of this utility model is to provide a kind of power transfer device, effectively can not carry out the problem of electrical source exchange for the relay solved in existing power supply switch circuit.
For achieving the above object, scheme of the present utility model comprises a kind of power transfer device, comprise main power source and accessory power supply, main power source exports and connects load, described power transfer device also comprises control device and switching tube, accessory power supply is exported by described switching tube and is connected on the outlet line of main power source, and the control output end of described main power source is by switching tube described in described control device control connection, and according to the state control switch pipe conducting of main power source whether described control device for.
Described switching tube is triode T8.
Described control device comprises metal-oxide-semiconductor T4 and operational amplifier U9B, metal-oxide-semiconductor T4 described in the output control connection of described main power source, the in-phase input end of described operational amplifier U9B is by described metal-oxide-semiconductor T4 ground connection, the voltage of one setting connects the inverting input of described operational amplifier U9B, the output control connection metal-oxide-semiconductor T6 of described operational amplifier U9B, the base stage of triode T7 is by metal-oxide-semiconductor T6 ground connection, the base stage of triode T8 is by triode T7 ground connection, and described accessory power supply is connected on the outlet line of described main power source by triode T8.
Described main power source comprises a rectification unit, is provided with diode D23 between the positive pole outlet line of described rectification unit and negative pole outlet line; The positive pole outlet line of described rectification unit connects the cathode output end of main power source, the positive pole outlet line of described rectification unit is serially connected with diode D9, the negative pole outlet line of described rectification unit connects the cathode output end of main power source, is provided with voltage-stabiliser tube D32 and electric capacity C20 between described cathode output end and cathode output end.
Described accessory power supply comprises rectifier DB1, and the output of rectifier is the output of accessory power supply, is provided with electric capacity C72 between the output of described accessory power supply.
This power transfer device comprises control device and switching tube, main power source exports and connects power supply port, accessory power supply exports and is connected on the outlet line of main power source, the outlet line of accessory power supply is connected in series this switching tube, main power source is by this switching tube of control device control connection, and control device is used for whether controlling this switching tube conducting according to the state of main power source.When main power source is load supplying, the control output end of main power source is by control device to switching tube control signal, and control switch pipe disconnects, and the circuit between accessory power supply and load disconnects, and now only has main power source to be load supplying; When main power source breaks power supply, control device is to the control signal of a switching tube conducting, and the conducting of control switch pipe, now accessory power supply is load supplying by switching tube, ensure that reliable power supply.
In addition, use switching tube as the switch element of electrical source exchange in this power transfer device, switching tube volume is very little, especially in integrated circuits, the switching tube of small size can use in very little environment, can not bring because of volume and use circumscribed problem, in addition, switching tube realizes switch according to control signal, it is electronic switch, not mechanical switch, therefore avoid the problems such as the adhesion brought due to mechanical problem when switch, ensure that effective switching of power supply.
Accompanying drawing explanation
Fig. 1 is traditional power supply switch circuit figure;
Fig. 2 is the structure chart of power transfer device;
Fig. 3 is the main circuit diagram of power transfer device;
Fig. 4 is the partial circuit figure mono-of the control device in power transfer device;
Fig. 5 is the partial circuit figure bis-of the control device in power transfer device;
Fig. 6 is the partial circuit figure tri-of the control device in power transfer device.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in more detail.
Power transfer device as shown in Figure 2, comprise main power source, accessory power supply, control device and triode T8, main power source exports and connects load, accessory power supply exports and is connected on the outlet line of main power source, the outlet line of accessory power supply is connected in series triode T8, main power source is by control device control connection triode T8, and control device is used for whether controlling triode T8 conducting according to the state of main power source.
As shown in Figure 3, main power source be input as three-phase alternating current, three-phase alternating current input connection rectification unit, diode D23 and switch transistor T 5 is provided with between the positive pole outlet line of rectification unit and negative pole outlet line, T5 is N channel enhancement field effect transistor, the grid of switch transistor T 5 is connected by electric capacity C26 on the negative pole outlet line of rectification unit, the positive pole outlet line of rectification unit is serially connected with diode D9, the positive pole outlet line of rectification unit connects the cathode output end of main power source, the negative pole outlet line of rectification unit connects the cathode output end of main power source, voltage-stabiliser tube D32 and electric capacity C29 is provided with between the cathode output end of main power source and cathode output end.The cathode output end ground connection of main power source, the cathode output end of main power source is for connecting load, and the grid of switch transistor T 5 is the output of output U9-4, U9-4 concatenation operation amplifier U9B.
Rectified three-phase circuit is the incoming line of main power source, and three-phase alternating current exports 24V direct current after inter-process, and this 24V direct current is the electric energy that main power source provides to load.
The input of accessory power supply is also alternating current, and alternating current input connects rectifier DB1, and the output of rectifier is the output of accessory power supply, is provided with electric capacity C72 and C73 between the both positive and negative polarity output of accessory power supply.The cathode output end ground connection of accessory power supply, the cathode output end of accessory power supply connects the cathode output end of main power source, differential concatenation diode D26 on connection line.The emitter of the cathode output end of accessory power supply connecting triode T8 simultaneously, the collector electrode of triode T8 is connected on the outlet line of main power source by diode D29.
AC28V is input as the input of accessory power supply, obtains 24V direct current through bridge rectifier, and this 24V direct current is the electric energy that accessory power supply provides to load.
Fig. 4, Fig. 5 and Fig. 6 form the circuit diagram of the entirety of the control device in the power transfer device that the utility model provides jointly.As shown in Figure 4, output voltage+the 24V of main power source exports LM+24V by a switching regulator, the negative pole end of the D11 in the resistance R12 connection layout 3 in Fig. 6, also be the cathode output end of main power source, T9-G port in T9-G port connection layout 5 in Fig. 6, the cathode output end of the accessory power supply in the resistance R99 connection layout 3 in Fig. 5.The base stage of triode T8 connects the cathode output end of accessory power supply and the drain electrode of metal-oxide-semiconductor T6 by voltage-stabiliser tube D28.Control device comprises metal-oxide-semiconductor T4 and operational amplifier U9B, the output direct control connection metal-oxide-semiconductor T4 of LM+24V or main power source, the in-phase input end of operational amplifier U9B is by metal-oxide-semiconductor T4 ground connection, the voltage of one setting (such as: be 1.25V in the present embodiment, certainly, also can be other magnitudes of voltage close to 1.25V) inverting input of concatenation operation amplifier U9B, the output control connection metal-oxide-semiconductor T6 of operational amplifier U9B, the base stage of triode T7 is by metal-oxide-semiconductor T6 ground connection, the base stage of triode T8 is by triode T7 ground connection, accessory power supply is connected on the outlet line of main power source by triode T8.
When main power source normally works, LM+24V is effective, metal-oxide-semiconductor T4 conducting, and RPF end is low level, inverting input due to operational amplifier U9B is 1.25V, so operational amplifier U9B output low level, metal-oxide-semiconductor T6 ends, triode T7 conducting, transistor T8 ends, and accessory power supply disconnects does not power; When main power source does not work, LM+24V is invalid, metal-oxide-semiconductor T4 ends, RPF end is high level, and the inverting input due to operational amplifier U9B is 1.25V, so operational amplifier U9B exports high level, metal-oxide-semiconductor T6 conducting, triode T7 ends, and transistor T8 conducting, accessory power supply is powered by transistor T8.
U5 is direct current voltage regulator, and ON/OFF is the control end of chip.When the main power source is off, T9-G exports as low level, and T9 disconnects, T10 conducting, and then ON/OFF end is low level, and U5 chip works, input direct-current 24V, exports direct current 5V, thus ensures that system power supply is normal.Owing to adopting totally digital circuit, so electrical source exchange speed is fast, and 24V power supply rear class is all connected to voltage stabilizing chip, so the voltage fluctuation of 24V when Switching power can not have influence on the voltage of the circuit of rear class.
In above-described embodiment, the switching tube of power transfer device is triode T8, and as other embodiment, switching tube also can be metal-oxide-semiconductor or other switching tubes, as long as can realize opening and closing according to control signal.
In above-described embodiment, main power source and accessory power supply all give concrete circuit diagram, and as other embodiment, main power source and accessory power supply can also be ACDC modular converters or be directly DC power supply.
In above-described embodiment, control device gives a kind of concrete control circuit, to realize the switching between main power source and accessory power supply, as other embodiment, circuit in control device can also be so complicated, a just controller, whether this controller carrys out the conducting of control switch pipe by the electricity that whether has of detection main power source.
Be presented above concrete execution mode, but the utility model is not limited to described execution mode.Basic ideas of the present utility model are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present utility model, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out execution mode when not departing from principle of the present utility model and spirit, amendment, replacement and modification still fall in protection range of the present utility model.
Claims (5)
1. a power transfer device, comprise main power source and accessory power supply, main power source exports and connects load, it is characterized in that, described power transfer device also comprises control device and switching tube, accessory power supply is exported by described switching tube and is connected on the outlet line of main power source, and the control output end of described main power source is by switching tube described in described control device control connection, and according to the state control switch pipe conducting of main power source whether described control device for.
2. power transfer device according to claim 1, is characterized in that, described switching tube is triode T8.
3. power transfer device according to claim 2, it is characterized in that, described control device comprises metal-oxide-semiconductor T4 and operational amplifier U9B, metal-oxide-semiconductor T4 described in the output control connection of described main power source, the in-phase input end of described operational amplifier U9B is by described metal-oxide-semiconductor T4 ground connection, the voltage of one setting connects the inverting input of described operational amplifier U9B, the output control connection metal-oxide-semiconductor T6 of described operational amplifier U9B, the base stage of triode T7 is by metal-oxide-semiconductor T6 ground connection, the base stage of triode T8 is by triode T7 ground connection, described accessory power supply is connected on the outlet line of described main power source by triode T8.
4. power transfer device according to claim 3, is characterized in that, described main power source comprises a rectification unit, is provided with diode D23 between the positive pole outlet line of described rectification unit and negative pole outlet line; The positive pole outlet line of described rectification unit connects the cathode output end of main power source, the positive pole outlet line of described rectification unit is serially connected with diode D9, the negative pole outlet line of described rectification unit connects the cathode output end of main power source, is provided with voltage-stabiliser tube D32 and electric capacity C20 between described cathode output end and cathode output end.
5. the power transfer device according to claim 3 or 4, is characterized in that, described accessory power supply comprises rectifier DB1, and the output of rectifier is the output of accessory power supply, is provided with electric capacity C72 between the output of described accessory power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520408862.8U CN204669074U (en) | 2015-06-12 | 2015-06-12 | A kind of power transfer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520408862.8U CN204669074U (en) | 2015-06-12 | 2015-06-12 | A kind of power transfer device |
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| Publication Number | Publication Date |
|---|---|
| CN204669074U true CN204669074U (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520408862.8U Expired - Fee Related CN204669074U (en) | 2015-06-12 | 2015-06-12 | A kind of power transfer device |
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| CN (1) | CN204669074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071571A (en) * | 2019-04-12 | 2019-07-30 | 无锡龙翼智能科技有限公司 | A kind of driving circuit of two-way direct current power supply power supply |
-
2015
- 2015-06-12 CN CN201520408862.8U patent/CN204669074U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071571A (en) * | 2019-04-12 | 2019-07-30 | 无锡龙翼智能科技有限公司 | A kind of driving circuit of two-way direct current power supply power supply |
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| 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: 20150923 Termination date: 20180612 |
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| CF01 | Termination of patent right due to non-payment of annual fee |