CN201541146U - Automatic two-way power supply switching unit - Google Patents
Automatic two-way power supply switching unit Download PDFInfo
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- CN201541146U CN201541146U CN2009202078202U CN200920207820U CN201541146U CN 201541146 U CN201541146 U CN 201541146U CN 2009202078202 U CN2009202078202 U CN 2009202078202U CN 200920207820 U CN200920207820 U CN 200920207820U CN 201541146 U CN201541146 U CN 201541146U
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- switch
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Abstract
The utility model discloses an automatic two-way power supply switching unit. The automatic switching unit comprises a control module, a switching module and a sampling module; the control module outputs control signals to control the switching module; the switching module receives control of control signals, so as to realize automatic switching of two ways of power supplies; the states of two ways of power supplies are fed back to the control module; the sampling module is used for sampling output AC signals of two ways of power supplies; and the sampled signals are fed back to the control module. The automatic two-way power supply switching unit is controlled by adopting a singlechip; and the control of a contactor is realized due to specific control logic and control circuit, thereby reducing cost, enhancing fault protection, widening the range of input voltage, and improving automation degree and reliability.
Description
Technical field
The utility model belongs to technical field of telecommunications, relates to a kind of two-way automatic power-supply switch.
Background technology
Problems such as existing contact type two-way automatic power-supply switch exists easy break-down, and automaticity is low, and reliability is low, and input voltage range is low.The trend that is replaced by other novel two-way automatic power-supply switchs is arranged at present, but novel two-way automatic power-supply switch exists the too high problem of cost.
The utility model content
Technical problem to be solved in the utility model is: the two-way automatic power-supply switch that a kind of low cost, high input voltage scope, high reliability are provided.
For solving the problems of the technologies described above, the utility model adopts following technical scheme.
A kind of two-way automatic power-supply switch comprises control module, handover module, and sampling module: control module output control signal is in order to the control handover module; Handover module receives the control of control signal, realizes the automatic switchover of two-way power supply, and gives control module with the state feedback of two-way power supply; Sampling module is sampled to the output AC signal of two-way power supply, and the signal feedback after will sampling is given control module.
As a kind of preferred version of the present utility model, described two-way power supply is A road power supply and B road power supply; Described sampling module comprises A road alternating voltage sample circuit and B road alternating voltage sample circuit.
As another kind of preferred version of the present utility model, described control module comprises the control single chip computer system, control signal latch cicuit and control signal drive circuit; The control single chip computer system judges that by A road alternating voltage sample circuit and B road alternating voltage sample circuit the A road exchanges the magnitude of voltage of input with the B road, and exports control signal according to the action logic of single-chip microcomputer; The control signal latch cicuit is in order to latch the control signal of control single chip computer system output; The control signal drive circuit is in order to receive the control signal of control single chip computer system output, and the control handover module is realized the automatic switchover of A road power supply and B road power supply.
As another preferred version of the present utility model, described handover module comprises contactor KM1, contactor KM2, A.C. contactor control coil JM1, A.C. contactor control coil JM2, relay J 1, relay J 2, J2, relay J 3, and relay J 4: contactor KM1 links to each other with A road power supply by K switch 1; Contactor KM2 links to each other with B road power supply by K switch 2; The end of A.C. contactor control coil JM1 links to each other with a live wire of A road power supply by K switch 1, and the other end links to each other with relay J 1; The end of A.C. contactor control coil JM2 links to each other with a live wire of B road power supply by K switch 2, and the other end links to each other with relay J 2; One end of relay J 1 links to each other with A.C. contactor control coil JM1, and the other end links to each other with the zero line of K switch 1 with A road power supply by resistance R 1; One end of relay J 2 links to each other with A.C. contactor control coil JM2, and the other end links to each other with the zero line of K switch 2 with B road power supply by resistance R 2; Relay J 3 is in parallel with resistance R 1; Relay J 4 is in parallel with resistance R 2.
As another preferred version of the present utility model, described contactor KM1 and contactor KM2 are mechanical interlocked contactor, are the main switches of described two-way automatic power-supply switch.
As another preferred version of the present utility model, the operating voltage range of described contactor KM1 and contactor KM2 is (85%-115%) * Ue, Ue is the nominal voltage of contactor control coil, but by resistance R 1, R2 and some logic broadenings of control single chip computer system the contactor operating voltage range, broadening adhesive operation voltage scope be (85%-130%) * Ue, simultaneously broadening adhesive keep voltage range and be (70%-130%) * Ue, Ue is the nominal voltage of contactor control coil.
The beneficial effects of the utility model are: it has adopted Single-chip Controlling; use the control of tentaculum that achieves a butt joint of specific control logic and control circuit, thereby reduced cost, increased error protection; broadening input voltage range, improved automaticity and reliability.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is the system block diagram of embodiment;
Fig. 2 is the systematic schematic diagram of embodiment.
Embodiment
The utility model adopts the main switch of contactor as automatic switching control equipment, uses single-chip microcomputer and interlock circuit to realize relevant protection logic simultaneously, thereby has proposed a kind of low cost, high reliability, the two-way automatic power-supply switch of wide voltage contactor type.
Embodiment
Present embodiment provides a kind of two-way automatic power-supply switch, as shown in Figure 1, comprises control module, handover module, and sampling module: control module output control signal is in order to the control handover module; Handover module receives the control of control signal, realizes the automatic switchover of two-way power supply, and gives control module with the state feedback of two-way power supply; Sampling module is sampled to the output AC signal of two-way power supply, and the signal feedback after will sampling is given control module.
The schematic diagram of present embodiment as shown in Figure 2, described two-way power supply is A road power supply and B road power supply; Described sampling module comprises A road alternating voltage sample circuit and B road alternating voltage sample circuit.
Described control module comprises the control single chip computer system, control signal latch cicuit and control signal drive circuit; The control single chip computer system judges that by A road alternating voltage sample circuit and B road alternating voltage sample circuit the A road exchanges the magnitude of voltage of input with the B road, and exports control signal according to the action logic of single-chip microcomputer; The control signal latch cicuit is in order to latch the control signal of control single chip computer system output; The control signal drive circuit is in order to receive the control signal of control single chip computer system output, and the control handover module is realized the automatic switchover of A road power supply and B road power supply.
Described handover module comprises contactor KM1, contactor KM2, and A.C. contactor control coil JM1, A.C. contactor control coil JM2, relay J 1, relay J 2, relay J 3, and relay J 4: contactor KM1 links to each other with A road power supply by K switch 1; Contactor KM2 links to each other with B road power supply by K switch 2; The end of A.C. contactor control coil JM1 links to each other with a live wire of A road power supply by K switch 1, and the other end links to each other with relay J 1; The end of A.C. contactor control coil JM2 links to each other with a live wire of B road power supply by K switch 2, and the other end links to each other with relay J 2; One end of relay J 1 links to each other with A.C. contactor control coil JM1, and the other end links to each other with the zero line of K switch 1 with A road power supply by resistance R 1; One end of relay J 2 links to each other with A.C. contactor control coil JM2, and the other end links to each other with the zero line of K switch 2 with B road power supply by resistance R 2; Relay J 3 is in parallel with resistance R 1; Relay J 4 is in parallel with resistance R 2.Described contactor KM1 and contactor KM2 are mechanical interlocked contactor, are the main switches of described two-way automatic power-supply switch.Described resistance R 1 and R2 are high voltage protective resistance.The operating voltage range of described contactor KM1 and contactor KM2 is (85%-115%) * Ue, broadening adhesive operation voltage scope be (85%-130%) * Ue, simultaneously broadening adhesive keep voltage range and be (70%-130%) * Ue, Ue is the nominal voltage of contactor control coil.
Operation principle of the present utility model is:
At first, the control single chip computer system judges that by A road alternating current sampling circuit and B road alternating current sampling circuit the A road exchanges the magnitude of voltage of input with the B road, and exports control signal (A road adhesive control signal, A road high voltage protective signal, B road adhesive control signal, B road high voltage protective signal) according to the action logic of control single chip computer system; Control signal is through behind control signal latch cicuit and the control signal drive circuit, the adhesive of control relay J1, J2, J3, J4 and disconnection, thus realized that the road AC power that meets voltage request devotes oneself to work.
The utility model adopts the control coil operating voltage at the contactor of (the 85%-115%) * Ue scope main switch (Ue is the nominal voltage of contactor control coil, and the utility model connects civil power) as automatic switching control equipment, thereby has realized low cost.
The utility model cooperates some logics of control single chip computer system by high voltage protective resistance R 1, R2 and relay J 3, J4; broadening adhesive operation voltage scope be (85%-130%) * Ue; simultaneously broadening adhesive keep voltage range and be (70%-130%) * Ue, concrete grammar is:
1. when exchanging input in (85%-130%) * Ue scope the time, by attracting electric relay J1 or J2, adhesive A.C. contactor control coil JM1 or JM2;
2. behind adhesive A.C. contactor control coil JM1 or the JM2, whether judge corresponding AC-input voltage greater than 115% * Ue, if greater than, then by disconnecting J3 or J4 seals in resistance R 1 or R2 carries out dividing potential drop; If be not more than, then keep J 3 or J4 closure, thereby realized high alternating voltage input.
3. when the interchange input is in (70%-85%) * Ue scope, directly adhesive of A.C. contactor control coil JM1 or JM2, but A.C. contactor control coil JM1 or JM2 can keep adhesive fully in this scope, so contactor KM1 or KM2 can keep former attracting state in this scope, and do not disconnect, thereby realized the adhesive of keeping of low alternating voltage input.
4. when AC-input voltage during less than 70% * Ue or greater than 130% * Ue, contactor KM1 or KM2 disconnect, if another road alternating voltage meets the input requirement, then drop into another road alternating current.
Reliability of the present utility model is embodied in following aspect:
(1) increased the not error protection of adhesive of contactor, promptly behind the signal that sends adhesive contactor KM1 or KM2, judge A road or B line state feedback signal, confirm whether adhesive of contactor KM1 or KM2, if not adhesive will be sent the signal that disconnects control contactor KM1 or KM2 immediately; After a bit of time, system will send the signal of adhesive contactor KM1 or KM2 once more, if confirm contactor KM1 or KM2 adhesive not yet according to A road or B line state feedback signal, can determine that then the contactor on this road can not drop into, and control single chip computer send corresponding warning information again.
(2) be subjected to electromagnetic interference for eliminating single-chip microcomputer, the phenomenon of program fleet, between control single chip computer (A road adhesive control signal, A road high voltage protective signal, B road adhesive control signal, B road high voltage protective signal) and control signal drive circuit, increase latch, when guaranteeing that program fleet crashes, the also control signal of contactor control coil that can output error; And behind Program reset, the control single chip computer system exports the state that control signal returns to before resetting by the output signal of control signal retaking of a year or grade control signal latch cicuit, to reduce malfunction.
(3) the utility model has also adopted approximate effective value alternating voltage sample circuit and watchdog circuit etc., to improve system reliability.
It below only is one of implementation method of the present utility model; on the basis of foregoing, do simple modification; just can realize the single-phase or three-phase alternating current input automatic switchover of two-way; even when two-way input zero line can not be interconnected, zero line is realized switching together; and the two-way power supply can be the active and standby type or the type that backups each other; but these similar modifications all belong to protection range of the present utility model.
The utility model has adopted Single-chip Controlling, uses the control of tentaculum that achieves a butt joint of specific control logic and control circuit, thereby has reduced cost, has increased error protection, broadening input voltage range, improved automaticity and reliability.
Here description of the present utility model and application are illustrative, are not to want with scope restriction of the present utility model in the above-described embodiments.Here the distortion of disclosed embodiment and change are possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present utility model or substantive characteristics, and the utility model can be with other forms, structure, layout, ratio, and realize with other elements, material and parts.
Claims (6)
1. a two-way automatic power-supply switch is characterized in that, comprising:
Control module, the output control signal is in order to the control handover module;
Handover module receives the control of control signal, realizes the automatic switchover of two-way power supply, and gives control module with the state feedback of two-way power supply;
Sampling module is sampled to the output AC signal of two-way power supply, and the signal feedback after will sampling is given control module.
2. two-way automatic power-supply switch according to claim 1 is characterized in that: described two-way power supply is A road power supply and B road power supply; Described sampling module comprises A road alternating voltage sample circuit and B road alternating voltage sample circuit.
3. two-way automatic power-supply switch according to claim 2 is characterized in that, described control module comprises:
The control single chip computer system judges that by A road alternating voltage sample circuit and B road alternating voltage sample circuit the A road exchanges the magnitude of voltage of input with the B road, and exports control signal according to the action logic of single-chip microcomputer;
The control signal latch cicuit is in order to latch the control signal of control single chip computer system output;
The control signal drive circuit, in order to receive the control signal of control single chip computer system output, the control handover module is realized the automatic switchover of A road power supply and B road power supply.
4. two-way automatic power-supply switch according to claim 3 is characterized in that, described handover module comprises:
Contactor KM1 links to each other with A road power supply by K switch 1;
Contactor KM2 links to each other with B road power supply by K switch 2;
A.C. contactor control coil JM1, an end links to each other with a live wire of A road power supply by K switch 1, and the other end links to each other with relay J 1;
A.C. contactor control coil JM2, an end links to each other with a live wire of B road power supply by K switch 2, and the other end links to each other with relay J 2;
Relay J 1, one end links to each other with A.C. contactor control coil JM1, and the other end links to each other with the zero line of K switch 1 with A road power supply by resistance R 1;
Relay J 2, one ends link to each other with A.C. contactor control coil JM2, and the other end links to each other with the zero line of K switch 2 with B road power supply by resistance R 2;
Relay J 3, in parallel with resistance R 1;
Relay J 4, in parallel with resistance R 2.
5. two-way automatic power-supply switch according to claim 4 is characterized in that: described contactor KM1 and contactor KM2 are mechanical interlocked contactor, are the main switches of described two-way automatic power-supply switch.
6. two-way automatic power-supply switch according to claim 4, it is characterized in that: the operating voltage range of described contactor KM1 and contactor KM2 is (85%-115%) * Ue, broadening adhesive operation voltage scope be (85%-130%) * Ue, simultaneously broadening adhesive keep voltage range and be (70%-130%) * Ue, Ue is the nominal voltage of contactor control coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202078202U CN201541146U (en) | 2009-08-13 | 2009-08-13 | Automatic two-way power supply switching unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202078202U CN201541146U (en) | 2009-08-13 | 2009-08-13 | Automatic two-way power supply switching unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201541146U true CN201541146U (en) | 2010-08-04 |
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ID=42592602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202078202U Expired - Lifetime CN201541146U (en) | 2009-08-13 | 2009-08-13 | Automatic two-way power supply switching unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201541146U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591281A (en) * | 2017-09-04 | 2018-01-16 | 珠海格力电器股份有限公司 | Relay decompression keeps control circuit and control method |
| CN107797477A (en) * | 2016-08-31 | 2018-03-13 | 特乐斯特机械(上海)有限公司 | Duplicate protection control system, control method and control device are sealed on a kind of cable |
| CN114069828A (en) * | 2021-11-18 | 2022-02-18 | 广东电网有限责任公司 | Automatic alternating current switching device and method |
-
2009
- 2009-08-13 CN CN2009202078202U patent/CN201541146U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107797477A (en) * | 2016-08-31 | 2018-03-13 | 特乐斯特机械(上海)有限公司 | Duplicate protection control system, control method and control device are sealed on a kind of cable |
| CN107591281A (en) * | 2017-09-04 | 2018-01-16 | 珠海格力电器股份有限公司 | Relay decompression keeps control circuit and control method |
| CN114069828A (en) * | 2021-11-18 | 2022-02-18 | 广东电网有限责任公司 | Automatic alternating current switching device and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100804 |
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| CX01 | Expiry of patent term |