CN210167968U - Switching power supply capable of reversing positively and negatively - Google Patents
Switching power supply capable of reversing positively and negatively Download PDFInfo
- Publication number
- CN210167968U CN210167968U CN201920877092.XU CN201920877092U CN210167968U CN 210167968 U CN210167968 U CN 210167968U CN 201920877092 U CN201920877092 U CN 201920877092U CN 210167968 U CN210167968 U CN 210167968U
- Authority
- CN
- China
- Prior art keywords
- power supply
- positive
- negative
- circuit
- switching power
- 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 switching power supply of positive and negative switching-over, including switching power supply circuit, positive and negative switching-over main circuit and control circuit, switching power supply circuit's output U0 constitutes positive and negative switching-over main circuit with two contactors, and the contactor includes KM1 and KM2, and KM 1's main contact and output U0's positive negative pole are just connecing, and KM 2's main contact and output U0's positive negative pole are connect conversely, and control circuit includes that interlocking electrically links up KM1 and KM 2; the utility model discloses the swift operation of output U0 positive and negative polarity switching-over has been realized through the contactor of two interlocks at switching power supply's output U0, need not the mechanical switching-over device through increasing the load and both can realize safe swift switching-over operation, has improved switching power supply's practicality and convenience greatly.
Description
Technical Field
The utility model particularly relates to a switching power supply specifically is a switching power supply of positive and negative switching-over.
Background
The output end of the switching power supply is often required to be switched in the use process of the switching power supply, the positive and negative switching of a contact point is usually realized by the switching power supply with the current switching function, wherein the positive and negative switching of the contact point is realized by the contact switching of the positive and negative electrodes at the output end through a contact conducting strip, for example, a switching device for the switching power supply with an authorized bulletin number of CN203660867U needs to occupy a large amount of space on the switching power supply, so that the volume of the switching power supply is increased, the cost of the switching power supply is increased due to a complex mechanical structure, and the later.
Therefore, in order to solve such problems, a switching power supply which is simple to operate, occupies a small space, and has low cost and can realize forward and reverse commutation is needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a switching power supply of positive and negative switching-over to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a positive and negative reversing switch power supply comprises a switch power supply circuit, a positive and negative reversing main circuit and a control circuit, wherein an output end U0 of the switch power supply circuit and two contactors form the positive and negative reversing main circuit, the contactors comprise KM1 and KM2, a main contact of KM1 is positively connected with a positive electrode and a negative electrode of an output end U0, a main contact of KM2 is reversely connected with a positive electrode and a negative electrode of an output end U0, the control circuit comprises KM1 and KM2 which are electrically connected in an interlocking manner, the control circuit is respectively provided with a positive connecting branch and a negative connecting branch, a positive connecting button SB1 in the positive connecting branch is connected with a KM1 normally open point in parallel and then sequentially connected with a KM2 auxiliary normally closed point and a KM1 coil in series, and a negative connecting button SB2 in the negative connecting branch is connected with a KM 2.
As a further aspect of the present invention: the switching power supply circuit 1 is any one of a single-ended forward switching power supply circuit, a push-pull switching power supply circuit, a half-bridge switching power supply circuit or a full-bridge switching power supply circuit.
As a further aspect of the present invention: an isolating switch QS is arranged between the switching power supply circuit 1 and an external input power supply.
As a further aspect of the present invention: and a power switch SB3 is arranged between the forward and reverse main circuit 2 and the control circuit 3.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses the swift operation of output U0 positive and negative polarity switching-over has been realized through the contactor of two interlocks at switching power supply's output U0, need not the mechanical switching-over device through increasing the load and both can realize safe swift switching-over operation, has improved switching power supply's practicality and convenience greatly.
Drawings
Fig. 1 is a schematic circuit diagram of a switching power supply with forward and reverse commutation.
Fig. 2 is a schematic circuit diagram of the forward button SB1 when the forward button SB1 is pressed in the switching power supply with forward and reverse commutation.
Fig. 3 is a schematic circuit diagram of the reverse connection button SB2 when the switch power supply with positive and negative commutation is pressed.
In the figure: a switching power supply circuit 1, a positive and negative commutation main circuit 2 and a control circuit 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1-3, in an embodiment of the present invention, a switching power supply with positive and negative commutation includes a switching power supply circuit 1, a main circuit 2 with positive and negative commutation and a control circuit 3, the output terminal U0 of the switching power supply circuit 1 and two contactors constitute the main circuit 2 with positive and negative commutation, the contactors include KM1 and KM2, the main contact of KM1 is connected with the positive and negative poles of the output terminal U0, the main contact of KM2 is connected with the positive and negative poles of the output terminal U0 in a reversed manner, the control circuit 3 includes the KM1 and KM2 which are electrically connected in an interlocking manner, the control circuit 3 is respectively provided with a positive connection branch and a negative connection branch, the positive connection button SB1 in the positive connection branch is connected in parallel with the normally open point of KM1 and then is connected in series with the auxiliary normally closed point of KM2 and the KM1 coil in sequence, and the negative connection branch is connected in parallel with the normally open point of KM2 and.
The switching power supply circuit 1 is any one of a single-ended forward switching power supply circuit, a push-pull switching power supply circuit, a half-bridge switching power supply circuit or a full-bridge switching power supply circuit.
An isolating switch QS is arranged between the switching power supply circuit 1 and an external input power supply.
And a power switch SB3 is arranged between the forward and reverse main circuit 2 and the control circuit 3.
The utility model discloses a theory of operation is: the effect of forward rotation button SB1 is pressed, the KM1 coil is powered at the moment of pressing, the auxiliary normally closed point of KM1 is disconnected, so that KM2 cannot work, KM1 and KM2 form electrical interlock, the normally open point of KM1 is closed to supply power to the coil, after the button SB1 is released, KM1 self-locking continuously works, the output end U0 is connected with the main contact of KM1, the KM1 main contact is closed, the output end U0 is connected positively, the power switch SB3 is pressed to disconnect the positive connection state of the output end U0, then the reverse connection button SB2 is pressed, at the moment of pressing, KM2 self-locking, the normally closed point of KM2 is disconnected, so that KM1 cannot work, simultaneously, the KM2 main contact is closed, the output end U0 is connected reversely;
therefore, the utility model discloses a switching power supply circuit 1 adopts traditional switching power supply circuit type, and mainly used turns into the required direct current of switching power supply with the alternating current, here at switching power supply's output U0 through the contactor of two interlocks: KM1 and KM2, the cooperation is respectively break-make KM1 and KM2 break-make connect button SB1 and connect button SB2 with the burden just, have realized the swift operation of output U0 positive and negative polarity switching-over, need not both can realize safe swift switching-over operation through the mechanical switching-over device that increases the load, have improved switching power supply's practicality and convenience greatly.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A positive and negative reversing switch power supply comprises a switch power supply circuit (1), a positive and negative reversing main circuit (2) and a control circuit (3), and is characterized in that the positive and negative reversing main circuit (2) is formed by an output end U0 of the switch power supply circuit (1) and two contactors, the contactors comprise KM1 and KM2, a main contact of KM1 is positively connected with a positive electrode and a negative electrode of an output end U0, a main contact of KM2 is reversely connected with a positive electrode and a negative electrode of an output end U0, the control circuit (3) comprises KM1 and KM2 which are electrically connected in an interlocking manner, the control circuit (3) is respectively provided with a positive connecting branch and a negative connecting branch, a positive connecting button SB1 in the positive connecting branch is connected in parallel with a KM1 normally open point and then is connected in series with a KM2 auxiliary normally closed point and a KM1 coil in sequence, and a negative connecting button SB2 in the negative connecting branch is connected in parallel with.
2. The forward-reverse commutating switch power supply according to claim 1, characterized in that the switch power supply circuit (1) is any one of a single-ended forward switch power supply circuit or a push-pull switch power supply circuit or a half-bridge switch power supply circuit or a full-bridge switch power supply circuit.
3. The switching power supply with positive and negative commutation according to claim 1, wherein a QS is provided between the switching power supply circuit (1) and an external input power supply.
4. The forward-reverse commutation switching power supply according to claim 1, wherein a power switch SB3 is provided between the main forward-reverse commutation circuit (2) and the control circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920877092.XU CN210167968U (en) | 2019-06-12 | 2019-06-12 | Switching power supply capable of reversing positively and negatively |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920877092.XU CN210167968U (en) | 2019-06-12 | 2019-06-12 | Switching power supply capable of reversing positively and negatively |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210167968U true CN210167968U (en) | 2020-03-20 |
Family
ID=70171698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920877092.XU Expired - Fee Related CN210167968U (en) | 2019-06-12 | 2019-06-12 | Switching power supply capable of reversing positively and negatively |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210167968U (en) |
-
2019
- 2019-06-12 CN CN201920877092.XU patent/CN210167968U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201549395U (en) | Mechanical electronic DC switch | |
| CN204696914U (en) | A kind of novel B oost converter | |
| CN206250838U (en) | D-c solenoid drive circuit and double power supply automatic transfer switch | |
| CN210167968U (en) | Switching power supply capable of reversing positively and negatively | |
| CN103247475B (en) | Constant-magnetic maintaining AC contactor control circuit and control method thereof | |
| CN202050264U (en) | Mobile power supply with common input/output interface | |
| CN202840512U (en) | Reverse-connection-preventing relay switch circuit | |
| CN214412365U (en) | Simple battery series-parallel connection switching structure | |
| CN104617773A (en) | Positive-negative automatic conversion circuit and power output module | |
| CN204992686U (en) | Battery power equalizing system | |
| CN203434373U (en) | Double-wire switch device | |
| CN201178382Y (en) | Electric power change-over circuit | |
| CN101860213A (en) | Multiple chopper power supply system in direct current reducing system for preparing polycrystals | |
| CN207052536U (en) | Nonpolarity high-voltage DC contactor arc quenching system structure | |
| CN204290460U (en) | The connecting circuit of step-down charger and uninterrupted power supply in a kind of uninterrupted power supply | |
| CN204651912U (en) | A kind of control circuit of high-speed circuit breaker | |
| CN202818186U (en) | A single-phase AC motor and a forward and backward rotation control circuit thereof | |
| CN202918265U (en) | Non-polar electronic switch | |
| CN212625264U (en) | Magnetic latching electronic touch switch circuit | |
| CN210015823U (en) | Electric energy meter telemechanical signal relay drive circuit | |
| CN201985610U (en) | Heavy current switchable power source device used for consumable vacuum arc furnace | |
| CN203466565U (en) | Breakage protective circuit for serially-connected energy module connecting pieces based on diodes | |
| CN217880112U (en) | Low-voltage direct-current power supply controller | |
| CN102957408A (en) | Non-polarity electronic switch | |
| CN201302955Y (en) | Magnetic latching relay adopting single-pole control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200320 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |