CN203984082U - The fast switch circuit of a kind of UPS - Google Patents
The fast switch circuit of a kind of UPS Download PDFInfo
- Publication number
- CN203984082U CN203984082U CN201420287358.2U CN201420287358U CN203984082U CN 203984082 U CN203984082 U CN 203984082U CN 201420287358 U CN201420287358 U CN 201420287358U CN 203984082 U CN203984082 U CN 203984082U
- Authority
- CN
- China
- Prior art keywords
- relay
- inversion
- bypass
- normally closed
- switching
- 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
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model relates to the fast switch circuit of a kind of UPS, in addition, on each loop, there are NO and the series connection of NC node of 2 relays, on the loop that needs to disconnect, there are 2 nodes to move simultaneously, avoid because of the contact endurance that draws electric arc influence relay between the action contact, a contact of a relay, in some frequent occasions of switching, the useful life that can greatly improve commutation circuit.
Description
Technical field
The utility model relates to the fast switch circuit of a kind of UPS.
Background technology
At present, in the commutation circuit of small-sized UPS (5kW and following power grade), consider the reasons such as cost, generally all use high-speed relay as switching device.Generally all use a relay or 2 relay composition commutation circuits.Relay composition commutation circuit with one with transfer contact is the simplest, but the time that always has a side to switch does not meet GB requirement, and because Chang Kai and normally closed node in a little relay, the distance of contact is very near, easy arcing when switching, has impact to the contact endurance of relay.Relay with two with transfer contact is done to switch, and can meet two sides' requirement switching time, but inevitably can cause the two-way output short-circuit of 10ms left and right.
Utility model content
The purpose of this utility model is to provide the fast switch circuit of a kind of UPS, slow or occur the problem of output short-circuit in order to solve existing commutation circuit switch speed.
For achieving the above object, scheme of the present utility model comprises:
A fast switch circuit of UPS, in by-pass line, string is established at least two relays, and one is bypass normally opened relay, another is bypass normally closed relay, on inversion outlet line, string is established two relays, and one is inversion normally opened relay, and another is inversion normally closed relay; Bypass outlet line and inversion outlet line are at outlet side short circuit; Described bypass normally closed relay, inversion normally closed relay move after the accessory power supply of UPS powers on; When bypass input is normal, the action of bypass normally opened relay; Inverter is exported when normal, the action of inversion normally opened relay.
Described bypass normally opened relay, bypass normally closed relay, inversion normally opened relay, inversion normally closed relay, be all parallel with the relay of 2-3 same model of the same type on each relay.
A kind of method for handover control, comprises the steps:
While needing the output of bypass input circuit, discharge bypass normally closed relay; While needing inverter output, discharge inversion normally closed relay;
While normally switching, discharge inversion normally opened relay, bypass normally closed relay from inversion to bypass, action inversion normally closed relay simultaneously; After time delay certain hour, then move inversion normally opened relay, ready for switching to the switching of inversion;
While normally switching from switching to inversion, discharge bypass normally opened relay, inversion normally closed relay, action bypass normally closed relay simultaneously; After time delay certain hour, then move bypass normally opened relay, for inversion ready to the switching of bypass;
Inversion, to the abnormal switching of bypass, discharges inversion normally opened relay, bypass normally closed relay simultaneously, action inversion normally closed relay;
Switch to the abnormal switching of inversion, discharge bypass normally opened relay, inversion normally closed relay simultaneously, action bypass normally closed relay.
Adopt version of the present utility model and operation, switching time is only relevant release time with relay.Because the release time of miniature relay is generally all faster more than 1 times than operate time, so just can, with the relay of common action/release time of 15ms/5ms, complete the quick switching in 5ms.
In addition, on each loop, there are NO and the series connection of NC node of 2 relays, on the loop that needs to disconnect, there are 2 nodes to move simultaneously, avoid because of the contact endurance that draws electric arc influence relay between the action contact, a contact of a relay, in some frequent occasions of switching, the useful life that can greatly improve commutation circuit.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model the present embodiment;
Schematic diagram when Fig. 2 is bypass output;
Schematic diagram when Fig. 3 is inversion output;
Fig. 4 is the normal transfer relay actuating signal figure of inversion to bypass;
Fig. 5 is the normal transfer relay actuating signal figure that switches to inversion;
Fig. 6 is the failover relay action signal figure of inversion to bypass;
Fig. 7 is the failover relay action signal figure that switches to inversion.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in more detail.
In by-pass line, string is established two relays, and one is bypass normally opened relay, and another is bypass normally closed relay, and on inversion outlet line, string is established two relays, and one is inversion normally opened relay, and another is inversion normally closed relay; Bypass outlet line and inversion outlet line are at outlet side short circuit.Bypass refers to bypass input circuit, and inversion refers to inverter outlet line.
1, bypass normally closed relay, inversion normally closed relay move after the accessory power supply of UPS powers on.When bypass input is normal, the action of bypass normally opened relay; Inverter is exported when normal, and inversion normally opened relay also moves.While needing the output of bypass input circuit, discharge bypass normally closed relay; While needing inverter output, discharge inversion normally closed relay.
2, while normally switching, discharge inversion normally opened relay, bypass normally closed relay from inversion to bypass, action inversion normally closed relay simultaneously.Due to release relay quick action, output can be switched in bypass fast.After time delay certain hour, then move inversion normally opened relay, ready for switching to the switching of inversion.
3, while normally switching from switching to inversion, discharge bypass normally opened relay, inversion normally closed relay, action bypass normally closed relay simultaneously.Due to release relay quick action, output can be switched in inversion output fast.After time delay certain hour, then move bypass normally opened relay, for inversion ready to the switching of bypass.
4, inversion is to the abnormal switching of bypass, and current is inverter output, if fault of converter must be switched to bypass output, discharges inversion normally opened relay, bypass normally closed relay simultaneously, action inversion normally closed relay.
5, switch to the abnormal switching of inversion, current is bypass output, if bypass fault must be switched to inverter output, discharges bypass normally opened relay, inversion normally closed relay simultaneously, action bypass normally closed relay.
Concrete, as the execution mode of Fig. 1, the fast switch circuit of a kind of small-sized UPS, bypass L line and inversion L line are at outlet side short circuit, and bypass normally opened relay, bypass normally closed relay are designated as respectively BK1, BK2.Inversion normally opened relay, inversion normally closed relay are designated as respectively IK1, IK2.Bypass N and the direct short circuit of inversion N line.The front and back position of two contact BK1, BK2 (IK1, IK2) on circuit can exchange.
The course of work is:
After the accessory power supply of 1, UPS powers on, BK2 and IK2 move, not output.Whether normally detect bypass input voltage, if whether normal normal BK1 action detects inverter output, if normal, IK1 also moves.At this moment, if need inverter output, just discharge IK2, if need bypass input output, just discharge BK2.Schematic diagram when Fig. 2 is bypass output, schematic diagram when Fig. 3 is inversion output.
2, inversion is to the normal switching of bypass, and current is inverter output, want to be switched to bypass output, just discharge IK1, BK2, action IK2, because IK1 and BK2 discharge simultaneously, so quick action, output is switched in bypass fast, and IK2 slow motion is a little, after 20ms, move again IK1, ready for switching to the switching of inversion.Fig. 4 is that the normal relay action signal figure switching of bypass changeover is arrived in inversion.Fig. 4 is in Fig. 7, and high level is action, and low level is for discharging.
3, switch to the normal switching of inversion, current is bypass output, wants to be switched to inverter output, just discharges BK1, IK2 simultaneously, action BK2, because BK1 and IK2 discharge, quick action, output is switched in inversion output fast.BK2 slow motion is a little, after 20ms, then moves BK1, for inversion ready to the switching of bypass.Fig. 5 switches to the relay action signal figure that inverter switches.
4, inversion is to the abnormal switching of bypass, and current is inverter output, if fault of converter, must be switched to bypass output, discharge IK1, BK2 simultaneously, action IK2, because IK1 and BK2 discharge, so quick action, output is switched in bypass fast, and IK2 slow motion is a little.When Fig. 6, inversion is to the relay action signal figure of the abnormal switching of bypass.
5, switch to the abnormal switching of inversion, current is bypass output, if bypass fault, must be switched to inverter output, discharge BK1, IK2 simultaneously, action BK2, because BK1 and IK2 discharge, quick action, it is upper that output is switched to inversion output fast, and BK2 slow motion is a little.Fig. 7 is the relay action signal figure that switches to the abnormal switching of inversion.
Can see from four kinds of upper switch instances, disconnection with drop into be all the quick dispose procedure of a relay.Ensure that be exactly the release time of relay switching time, according to selected relay difference, generally can ensure that be 2-4ms switching time, such as the finder relay 40.61.7024 of legend choosing just can ensure switching time of 3ms.
As other execution modes, can be by the parallel connection of relay, the applied power scope of expansion commutation circuit, if the position of each relay is by 3 identical parallel connections, can be applied to the UPS of 10kW.But because of equal flow problem and the deviation of operate time, general number in parallel does not exceed 3-4 and is advisable.
More than provided 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, model, formula, the parameter of designing various distortion do not need to spend creative work.Variation, amendment, replacement and the modification of in the situation that not departing from principle of the present utility model and spirit, execution mode being carried out still fall in protection range of the present utility model.
Claims (2)
1. the fast switch circuit of a UPS, it is characterized in that, in by-pass line, string is established at least two relays, one is bypass normally opened relay, another is bypass normally closed relay, on inversion outlet line, string is established two relays, and one is inversion normally opened relay, and another is inversion normally closed relay; Bypass outlet line and inversion outlet line are at outlet side short circuit; Described bypass normally closed relay, inversion normally closed relay move after the accessory power supply of UPS powers on; When bypass input is normal, the action of bypass normally opened relay; Inverter is exported when normal, the action of inversion normally opened relay.
2. the fast switch circuit of a kind of UPS according to claim 1, it is characterized in that, described bypass normally opened relay, bypass normally closed relay, inversion normally opened relay, inversion normally closed relay, be all parallel with the relay of 2-3 same model of the same type on each relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420287358.2U CN203984082U (en) | 2014-05-30 | 2014-05-30 | The fast switch circuit of a kind of UPS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420287358.2U CN203984082U (en) | 2014-05-30 | 2014-05-30 | The fast switch circuit of a kind of UPS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203984082U true CN203984082U (en) | 2014-12-03 |
Family
ID=51981498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420287358.2U Expired - Fee Related CN203984082U (en) | 2014-05-30 | 2014-05-30 | The fast switch circuit of a kind of UPS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203984082U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037933A (en) * | 2014-05-30 | 2014-09-10 | 许继电气股份有限公司 | Rapid switching circuit and switching control method of UPS (Uninterruptible Power Supply) |
-
2014
- 2014-05-30 CN CN201420287358.2U patent/CN203984082U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037933A (en) * | 2014-05-30 | 2014-09-10 | 许继电气股份有限公司 | Rapid switching circuit and switching control method of UPS (Uninterruptible Power Supply) |
| CN104037933B (en) * | 2014-05-30 | 2018-08-10 | 许继电气股份有限公司 | A kind of fast switch circuit and method for handover control of UPS |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106602504A (en) | Photovoltaic rapid turn-off device and photovoltaic system | |
| CN104979796A (en) | Pre-charged high speed direct current breaker and control method therefor | |
| CN103532218A (en) | Rapid double power supply switch device and working method thereof | |
| WO2019104793A1 (en) | Micro-loss combined mechanical direct current circuit breaker and control method therefor | |
| CN205248819U (en) | Looks switch is selected to three phase loads of low pressure | |
| CA2744645A1 (en) | Arc fault protection circuit and method | |
| CN102074394B (en) | Arc-extinguishing switch and switching method thereof | |
| CN105514949A (en) | Solid state power controller with latent flux prevention function and control method | |
| CN102842958A (en) | Mechanical-electronic hybrid double-power-supply automatic change-over switch | |
| CN202586484U (en) | Double-circuit power supply circuit having precharge function during electrification and high-voltage frequency converter | |
| CN103903904B (en) | A kind of Antibouncer Loop of High-voltage Breaker | |
| CN203984082U (en) | The fast switch circuit of a kind of UPS | |
| CN103715762A (en) | Bidirectional switching circuit of hybrid power supply system and control method of bidirectional switching circuit | |
| CN203071581U (en) | Equipotential intelligent capacitor bank | |
| CN205160036U (en) | High -speed direct current breaker of chargeable type in advance | |
| CN204517389U (en) | Discharge circuit | |
| CN205666679U (en) | UPS of bypass automatic switch -over type | |
| CN104037933A (en) | Rapid switching circuit and switching control method of UPS (Uninterruptible Power Supply) | |
| CN107845519A (en) | Double power supply automatic transfer switch and its control method | |
| CN204732957U (en) | The seamless automatic switching control equipment of a kind of DC power supply | |
| CN111245087A (en) | Hybrid direct-current fast switching device and control method thereof | |
| CN207572949U (en) | A kind of two-way no camber mixed DC breaker | |
| CN102916482B (en) | A kind of low pressure commutation circuit | |
| CN109545621A (en) | A kind of driving circuit applied to the high-power contactor of aerospace | |
| CN204761144U (en) | Power supply auto -change over device based on high speed thyristor switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20141203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |