CN101902066A

CN101902066A - Method for sharing magnetic core of transformer by two stages of auxiliary power supplies and device thereof

Info

Publication number: CN101902066A
Application number: CN2009101438703A
Authority: CN
Inventors: 徐毛邓; 李鹏
Original assignee: Beijing Dynamic Power Co Ltd
Current assignee: Beijing Dynamic Power Co Ltd
Priority date: 2009-06-01
Filing date: 2009-06-01
Publication date: 2010-12-01

Abstract

The invention provides a method for sharing a magnetic core of a transformer by two stages of auxiliary power supplies. The method is characterized in that: when the primary input power supply works, the secondary input power supply does not work, and an output source of the primary input power supply is obtained on the transformer; when the secondary input power supply works, the primary input power supply does not work, and an output source of the secondary input power supply is obtained on the transformer; the primary input power supply flows through a controller (1) to enter the transformer, and the secondary input power supply flows through a controller (2) to enter the transformer; the controller (1) controls whether the primary input power supply works or not, while the controller (2) controls whether the secondary input power supply works or not; and the controller (1) or the controller (2) is realized through an integrated chip or a discrete device.

Description

A kind of method of sharing magnetic core of transformer by two stages of auxiliary power supplies and device

Technical field

The present invention relates to a kind of method and device of sharing magnetic core of transformer by two stages of auxiliary power supplies.

Background technology

Now in the power electronic technology, for guarantee the equipment prime close or the situation of power cut-off under, circuit such as control and communication still can operate as normal, adopts the solution of two stages of auxiliary power supplies more.As shown in Figure 1, first order input power supply obtains output source by first order transformer, and second level input power supply obtains output source by second level transformer.When first order input power work, second level input power supply can not worked as standby Switching power; When first order input power supply went wrong, second level input power supply was started working.Because first order input power supply and second level input power supply can not worked simultaneously, so the magnetic core of two transformers always has one to be in idle state, adopt the solution of existing two stages of auxiliary power supplies, not only can increase power volume but also can cause waste magnetic core of transformer.

Summary of the invention

The present invention is with the shared same magnetic core of transformer of two stages of auxiliary power supplies, power by first order input power supply when making its operate as normal, by the power supply of second level input power supply, employing the present invention has not only reduced the volume of accessory power supply part but also can save the cost of magnetic core part under standby or the fault mode.

The present invention is achieved in that a kind of method of sharing magnetic core of transformer by two stages of auxiliary power supplies, it is characterized in that: during first order input power work, second level input power supply is not worked, and obtains the output source of first order input power supply on transformer; During second level input power work, first order input power supply is not worked, and obtains the output source of second level input power supply on transformer.The first order input power supply controller 1 of flowing through enters transformer.The second level input power supply controller 2 of flowing through enters transformer.Whether controller 1 control first order input power supply works.Whether controller 2 control second level input power supplys work.Controller 1 or controller 2 are to realize by integrated chip or discrete device.

A kind of device of sharing magnetic core of transformer by two stages of auxiliary power supplies comprises first order input power supply, second level input power supply, controller 1, controller 2, transformer and output source, and it is characterized in that: first order input power supply links to each other with transformer by controller 1; Second level input power supply links to each other with transformer by controller 2.Whether controller 1 control first order input power supply works.Whether controller 2 control second level input power supplys work.Controller 1 or controller 2 are to realize by integrated chip or discrete device.

Description of drawings

Fig. 1 is the solution of existing two stages of auxiliary power supplies.

Fig. 2 is the solution of two stages of auxiliary power supplies of the present invention.

Fig. 3 is the embodiment of the invention 1 circuit diagram.

Fig. 4 is the embodiment of the invention 2 circuit diagrams.

Specific embodiment

Below in conjunction with accompanying drawing the present invention is elaborated, Fig. 2 is the solution of two stages of auxiliary power supplies of the present invention, and as shown in the figure, the present invention imports power supply and second level input power supply with the first order to be connected into same transformer, obtains output source on this transformer.Controller 1 and controller 2 can also can be built realization with discrete device with integrated chip, as long as satisfy when first order input power work, controller 2 is not worked second level input power supply; When second level input power work, controller 1 makes first order input power supply not work just passable.

Fig. 3 is the embodiment of the invention 1 circuit diagram, and controller 1 among the figure and controller 2 also have the function of feedback except controlling whether two stages of auxiliary power supplies work.What present embodiment adopted is the NCP1015 chip, when first order input power supply V1 work, in the controller 2, V4 is in high level, metal-oxide-semiconductor Q4 conducting, FB pin level among the chip U2 is dragged down, U2 is in idle state, second level input this moment power supply V2 can't inflow transformer in, simultaneously in controller 1, V3 is in low level, and Q2 is conducting not.Because chip U1 can realize self-powered by the DRAIN pin, first order input power supply V1 can inflow transformer like this, will there be this moment induced voltage to produce in the coil in the T1 transformer, when the induced voltage in the coil during greater than the voltage of voltage-stabiliser tube D1, Q1 is operated in magnifying state, the voltage of the FB pin of U1 changes with the change in voltage of feedback voltage V d1, U1 is in running order, the DRAIN pin can just be exported the PWM ripple of different duty according to the voltage of FB pin, thereby realizes the FEEDBACK CONTROL to first order input power supply.When first order input power supply V1 did not work, in the controller 1, V3 was in high level, and Q2 is in conducting state, and the FB pin current potential of U1 is dragged down, and this moment, U1 was in idle state, and first order input power supply V1 can't inflow transformer.In controller 2, V4 is in low level, metal-oxide-semiconductor Q4 ends, because U2 can realize self-powered by the DRAIN pin, so second level input this moment power supply V2 can inflow transformer, will there be induced voltage to produce in the coil in transformer, when the induced voltage in the coil during greater than the voltage of voltage-stabiliser tube D2, Q3 is operated in magnifying state, the voltage of the FB pin of U2 changes with the variation of feedback voltage V d2, U2 is in running order, and the DRAIN pin can just be exported the PWM ripple of different duty according to the voltage of FB pin, thereby realizes the FEEDBACK CONTROL to second level input power supply.

Fig. 4 is the embodiment of the invention 2 circuit diagrams, and controller 1 and controller 2 are the control that realizes the first order is imported power supply and second level input power supply by discrete device in the present embodiment.As shown in the figure, when first order input power supply V1 work, V8 is in high level in the controller 1, metal-oxide-semiconductor Q8 conducting, V7 is in low level in controller 2 simultaneously, and metal-oxide-semiconductor Q7 ends, second level input power supply V2 does not work, and obtains the output source 1 and the output source 2 of first order out-put supply on transformer; When second level input power supply V2 work, in controller 2, V7 is in high level, metal-oxide-semiconductor Q7 conducting, input power work in the second level is simultaneously in controller 1, V8 is in low level, metal-oxide-semiconductor Q8 ends, and first order input power supply V1 does not work, and obtains the output source 1 ' and the output source 2 ' of second level input power supply on transformer.

Controller 1 or controller 2 can be realized by integrated chip or discrete device as can be seen from above embodiment.

Claims

1. the method for a sharing magnetic core of transformer by two stages of auxiliary power supplies is characterized in that:

During first order input power work, second level input power supply is not worked, and obtains the output source of described first order input power supply on transformer;

When power work was imported in the described second level, described first order input power supply was not worked, and obtains the output source of described second level input power supply on described transformer.

2. a kind of method of sharing magnetic core of transformer by two stages of auxiliary power supplies according to claim 1 is characterized in that: the described first order input power supply controller (1) of flowing through enters described transformer.

3. a kind of method of sharing magnetic core of transformer by two stages of auxiliary power supplies according to claim 1 is characterized in that: the described second level input power supply controller (2) of flowing through enters described transformer.

4. as the method for a kind of sharing magnetic core of transformer by two stages of auxiliary power supplies as described in the claim 2, it is characterized in that: whether the described first order input of described controller (1) control power supply works.

5. as the method for a kind of sharing magnetic core of transformer by two stages of auxiliary power supplies as described in the claim 3, it is characterized in that: whether the described second level input of described controller (2) control power supply works.

6. as the method for a kind of sharing magnetic core of transformer by two stages of auxiliary power supplies as described in the claim 2 to 5, it is characterized in that: described controller (1) or controller (2) are to realize by integrated chip or discrete device.

7. the device of a sharing magnetic core of transformer by two stages of auxiliary power supplies, comprise first order input power supply, second level input power supply, controller (1), controller (2), transformer and output source, it is characterized in that: described first order input power supply links to each other with described transformer by described controller (1); Described second level input power supply links to each other with described transformer by described controller (2).

8. as the device of a kind of sharing magnetic core of transformer by two stages of auxiliary power supplies as described in the claim 7, it is characterized in that: whether the described first order input of described controller (1) control power supply works.

9. as the device of a kind of sharing magnetic core of transformer by two stages of auxiliary power supplies as described in the claim 7, it is characterized in that: whether the described second level input of described controller (2) control power supply works.

10. as the device of a kind of sharing magnetic core of transformer by two stages of auxiliary power supplies as described in the claim 7 to 9, it is characterized in that: described controller (1) or controller (2) are to realize by integrated chip or discrete device.