CN201378752Y

CN201378752Y - Power supply transfer device

Info

Publication number: CN201378752Y
Application number: CN200920151488U
Authority: CN
Inventors: 王占武
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-24
Filing date: 2009-04-24
Publication date: 2010-01-06
Anticipated expiration: 2019-04-24

Abstract

The utility model relates to a power supply transfer device which comprises a first power supply input end connected with a first power supply, a second power supply input end connected with a second power supply, a first switch unit arranged between the first power supply input end and a load, a second switch unit arranged between the second power supply input end and the load, a power supply detection unit for detecting the first power supply, and a control unit for controlling the first switch unit and the second switch unit to select breakover according to the power supply detection unit; and the first switch unit and the second switch unit both comprise a contactor and a controllable silicon which are connected in parallel. At the instant that the power supply is connected, a circuit is fast in breakover by the controllable silicon; after the circuit is in breakover, the contactor continously supplies power; and as the contactor is in breakover without power dissipation, therefore the fast switching and breakover without power dissipation of the power supply switching device are guaranteed and the power dissipation caused by a breakover element is greatly reduced.

Description

Power transfer device

Technical field

The utility model relates to a kind of power transfer device.

Background technology

Publication number is that the Chinese invention patent of CN101388566A discloses a kind of dual power supply automatic switching device, and it comprises central control unit, first power sense circuit, second source testing circuit, the first optocoupler reverse-blocking tetrode thyristor circuit and the second optocoupler reverse-blocking tetrode thyristor circuit.Central control unit detects the power supply state of first supply terminals and second source testing circuit detection second source terminals respectively according to first power sense circuit, when first supply terminals is not powered, the second optocoupler reverse-blocking tetrode thyristor circuit turn-on is controlled with the Millisecond switch speed in the central controller unit, and the second source terminals are powered to the load wiring end.Wherein, adopt controllable silicon, realized noncontacting switch, guaranteed that the switch speed between the duplicate supply reaches Millisecond as switch member.

Open controllable silicon has made full use of the characteristics that controllable silicon " is triggered at any moment " as switch element in the above-mentioned patent documentation, has guaranteed the switch speed of Millisecond.But the silicon controlled power consumption is relatively large, continues turning circuit with controllable silicon, and cost is bigger.

Publication number is the method that the patent of invention of CN1851839A discloses a kind of contactor arcless current distributing-cutting-off of bypass type motor soft starting device; the soft starting device that is composed in parallel by bidirectional triode thyristor and contactor is disclosed; under the control of governor circuit; control ghyristor circuit triggering and conducting when above-mentioned contactor will disconnect; make contactor not have electric arc when disconnecting and produce, and then the life-span can not shortened because of arc erosion in the contact of protection contactor.Disclosed soft starting device only is used to eliminate the electric arc that produces when contactor disconnects in the above-mentioned file.

The utility model content

For this reason, technical problem to be solved in the utility model is to provide a kind of high-speed power switching device shifter of low-power consumption.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:

A kind of power transfer device, comprise first power input that links to each other with first power supply, the second source input that links to each other with second source, be arranged at first switch element between described first power input and the load and be arranged at second switch unit between described second source input and the described load, detect the power supply detecting unit of described first power supply, and control described first switch element according to described power supply detecting unit, the control unit of conducting, described first switch element are selected in described second switch unit, described second switch unit composes in parallel by contactor and controllable silicon.

Described first power supply and described second source are AC power, and described first switch element, described second switch unit constitute by three contactors, each described contactor bidirectional triode thyristor in parallel.

Described first power supply and described second source are DC power supply, and described first switch element, described second switch unit compose in parallel by a contactor and an one-way SCR.

Technique scheme of the present utility model has the following advantages compared to existing technology:

Power transfer device of the present utility model composes in parallel first switch element, second switch unit by contactor and controllable silicon, guarantees that power supply is connecting in a flash, by the quick turning circuit of described controllable silicon; Behind circuit turn-on, by described contactor continued power, because described contactor does not almost have the power consumption conducting, so guaranteed the quick switching of described power transfer device and do not had the power consumption conducting.Than the circuit of simple dependence controllable silicon conducting, can significantly reduce the power consumption that breakover element causes.

Description of drawings

For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below

Fig. 1 is the functional structure chart of an embodiment of the utility model;

Switch element schematic diagram when Fig. 2 is Alternating Current Power Supply for load of the present utility model;

Switch element schematic diagram when Fig. 3 is direct current supply for the utility model load.

Embodiment

Functional structure chart referring to an embodiment of the present utility model shown in Figure 1, power transfer device of the present utility model, comprise first power input that links to each other with first power supply, the second source input that links to each other with second source, be arranged at first switch element between described first power input and the load and be arranged at second switch unit between described second source input and the load, detect the power supply detecting unit of described first power supply, and control described first switch element according to described power supply detecting unit, the control unit of conducting is selected in described second switch unit.Described first power supply is power supply commonly used, and second source is a stand-by power supply; Described power supply detecting unit continues to detect to described first power supply, when detected described first power supply has the power supply input of power supply input and described first power supply can satisfy described load normally to move needs, promptly this information is reported described control unit, described control unit is controlled described first power supply of the described first switch element gating to described electric; When detected described first power supply non-transformer input or described first power supply have the power supply input but described power supply input can't satisfy described load and normally move needs the time, promptly this information is reported described control unit, described control unit is controlled the described second source of described second switch one-cell switching to described electric.In described second switch unit in the process of described electric, when the described power supply that described power supply detecting unit detects described first power supply and have power supply input and input satisfies described load operate as normal needs, described power control unit promptly reports described control unit to this information, controls described first power supply to described electric by described control unit.

Referring to shown in Figure 2, being AC power with described first power supply, described second source is example, described first switch element, described second switch unit constitute by three winding tentaculums, each described contactor bidirectional triode thyristor in parallel, each group contactor parallel with one another is imported mutually with one of described first power supply, described second source respectively with bidirectional triode thyristor and is connected.Figure 2 shows that the schematic diagram of described first switch element, wherein, that link to each other with the input of U phase voltage is contactor KM3 and the bidirectional triode thyristor KG3 in parallel with described contactor KM3; That link to each other with V phase voltage input (V+) is contactor KM2 and the bidirectional triode thyristor KG2 in parallel with described contactor KM2; That W phase voltage input (W+) is continuous is contactor KM1 and the bidirectional triode thyristor KG1 in parallel with described contactor KM1.Described U+, V+ and W+ constitute described first power input, supply to described load by U-, V-, W-behind described switch element.

Referring to Fig. 2, the detailed process of the described first switch element conducting is as follows: with U phase power supply input conducting is example, under the control of described control unit, described bidirectional triode thyristor KG3 at first connects, guarantee the described U phase of conducting power supply in the power supply input like this, the time of conducting is controlled in the Millisecond scope; Afterwards, described control unit is connected described contactor KM3; Disconnect described bidirectional triode thyristor KG3 at last, continue conducting by described contactor KM3.The closed conducting of described contactor KM3 is reliable, the main contacts contact resistance of described contactor KM3 is little, the conducting capacity is big, pressure drop is little, power consumption is little, safe and reliable, by the circuit of bidirectional triode thyristor conducting, circuit of the present utility model can significantly reduce the power consumption that conduction device causes compared with merely.The process of the conducting of other two-phase power supplies is consistent with the process of described U phase power turn-on, does not repeat them here.Like this by contactor and bidirectional triode thyristor parallel connection as switch element, guarantee the quick conducting and the low-power consumption conducting of described switch element: promptly when starting working, realize the high speed switching by described bidirectional triode thyristor, by described contactor continued power when the conducting, realize the low-power consumption of described switch element.The detailed process of described second switch cell conduction is with described first switch element, and this does not give unnecessary details.Like this,, select described first power supply of conducting or described second source fast, guarantee that described load is worked continually and steadily in the process that described first power supply and described second source switch mutually by the unified control of control unit.

Referring to shown in Figure 3, as another embodiment of the present utility model, described first power supply, described second source are DC power supply, and described first switch element, described second switch unit compose in parallel by a contactor KM and a unidirectional controllable silicon S CR.The process of one phase power work was identical when the detailed process of described first switch element, described second switch cell operation was alternating current with above-mentioned power supply, and this does not give unnecessary details.

Obviously, the foregoing description only is for example clearly is described, and is not the qualification to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And conspicuous variation of being extended out thus or change still are among the protection range of the present utility model.

Claims

1. power transfer device, comprise first power input that links to each other with first power supply, the second source input that links to each other with second source, be arranged at first switch element between described first power input and the load and be arranged at second switch unit between described second source input and the described load, detect the power supply detecting unit of described first power supply, and control described first switch element according to described power supply detecting unit, the control unit of conducting is selected in described second switch unit, it is characterized in that: described first switch element, described second switch unit composes in parallel by contactor and controllable silicon.

2. device according to claim 1, it is characterized in that: described first power supply and described second source are AC power, described first switch element, described second switch unit constitute by three contactors, each described contactor bidirectional triode thyristor in parallel.

3. device according to claim 1 is characterized in that: described first power supply and described second source are DC power supply, and described first switch element, described second switch unit compose in parallel by a contactor and an one-way SCR.