CN201587779U - Power supply system of elevator - Google Patents
Power supply system of elevator Download PDFInfo
- Publication number
- CN201587779U CN201587779U CN2009203181357U CN200920318135U CN201587779U CN 201587779 U CN201587779 U CN 201587779U CN 2009203181357 U CN2009203181357 U CN 2009203181357U CN 200920318135 U CN200920318135 U CN 200920318135U CN 201587779 U CN201587779 U CN 201587779U
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- China
- Prior art keywords
- circuit breaker
- load
- elevator
- rectification
- voltage transformer
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- 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 - Lifetime
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Abstract
The utility model discloses a power supply system of an elevator, which comprises a transformer and a rectification circuit, wherein the input end of the transformer is provided with a main micro circuit breaker; the rectification circuit comprises a rectification bridge and a filter capacitor and a discharge resistor which are connected at the output end of the rectification bridge in parallel; the output end of the transformer is connected with the input end of the rectification bridge; the output end of the rectification circuit is connected with load; a secondary micro circuit breaker is connected between the output end of the rectification circuit and the load in series; and a fuse protector is connected between the output end of the transformer and the input end of the rectification bridge in series. The secondary micro circuit breaker is arranged among the filter capacitor and the discharge resistor of the rectification circuit and the load, thus not only maintaining the function of the secondary micro circuit breaker of protecting the load, but also being capable of thoroughly preventing the loop from being disconnected due to faulty action of the secondary micro circuit breaker caused by surging current of the filter capacitor, therefore, the power supply system is suitable for supplying power for the load of an elevator such as call, display and the like.
Description
Technical field
The utility model relates to a kind of low-voltage DC supply system, especially relates to a kind of elevator supply system that low-voltage dc power supply is provided for elevator.
Background technology
In elevator industry, calling (being used to exhale ladder), demonstration (being used for floor shows) even load all need independently usually, and power supply is its power supply, be wherein the most frequently used a kind of power supply mode as shown in Figure 1, the alternating current of machine room 380V is by voltage transformer b transformation, commutating circuit rectification through being made up of rectifier bridge d, filter capacitor e and discharging resistance f etc. again provides vdc for calling, demonstration even load g then.In order to prevent effectively, a main miniature circuit breaker a is set at the input end of voltage transformer b because of voltage transformer b short circuit, the fault that causes of overload; For phenomenons such as short circuit, overload appear in calling, the demonstration even load g that effectively prevents elevator, between the rectifier bridge d of voltage transformer b and rectifying circuit, be connected in series miniature circuit breaker c one time simultaneously.Above-mentioned electric power system has high disturbance rejection, advantage cheaply, but also has following defective simultaneously: power on or main miniature circuit breaker a closes, loop energising moment at elevator, filter capacitor e charging also is equivalent to short circuit, thereby can form surge current.Because the pulsewidth of surge current is generally about 6 milliseconds, and the time that reaches the magnetic tripping characteristic of time miniature circuit breaker c is generally several milliseconds, thereby make time miniature circuit breaker c misoperation easily and disconnect, and then cause elevator calling, show that even load g can't power on.
Someone overcomes above defective by the method that inferior miniature circuit breaker c is replaced with bigger specification, though said method can reduce the incidence of misoperation, when existing load overload to occur simultaneously, inferior miniature circuit breaker c is the problem of cutoff circuit effectively.And even if D type miniature circuit breaker, its magnetic drop-away value is generally 10～14In, and surge current value 10～60In often, so said method can not be avoided the misoperation of time miniature circuit breaker c fully.
The somebody is replaced with fuse with the inferior miniature circuit breaker in the loop, as notification number is a kind of elevator control circuit supply unit of CN 2649549Y, comprise supply transformer, silicon rectifier and filter capacitor etc., be serially connected with fuse respectively at the input end and the mouth of supply transformer.Because the turnoff time of fuse is greater than the pulsewidth of surge current, so fuse can't disconnect.But fuse has only simple overload protection, and therefore multiple protective effects such as under-voltage, the overvoltage that does not have that miniature circuit breaker has can not carry out the actv. protection to whole supply unit.
The utility model content
Cause in order to overcome the easy misoperation of miniature circuit breaker that existing elevator low-voltage DC supply system exists the deficiency that opens circuit, the utility model provide a kind of circuit simple, can effectively avoid causing the elevator supply system that opens circuit because of the miniature circuit breaker misoperation.
To achieve these goals, the utility model is by the following technical solutions: a kind of elevator supply system, comprise voltage transformer and rectifying circuit, input end at voltage transformer is provided with main miniature circuit breaker, described rectifying circuit is made up of rectifier bridge and the filter capacitor and the discharging resistance that are connected in parallel on rectification bridge output end, the mouth of voltage transformer is connected with the input end of rectifier bridge, the mouth of rectifying circuit is connected with load, is in series with miniature circuit breaker between the mouth of rectifying circuit and load one time.The utility model will have inferior miniature circuit breaker position in the design now between the filter capacitor, discharging resistance and the load that have moved on to rectifying circuit between voltage transformer and the rectifier bridge; kept the defencive function of inferior miniature circuit breaker on the one hand, can thoroughly avoid the surge current of filter capacitor to cause time miniature circuit breaker misoperation and cutoff circuit simultaneously load.In addition, because that voltage transformer is set up pulsewidth time of time ratio surge current in magnetic field is long, therefore, surge current can't cause the misoperation of the main miniature circuit breaker of voltage transformer front end.
As preferably, between the input end of the mouth of voltage transformer and rectifier bridge, be in series with a fuse, thereby can effectively protect rectifier bridge, filter capacitor, discharging resistance, avoid occurring puncturing the short circuit that causes.
As preferably, the rated current of described fuse is 1.2 times of loop rated current, both can effectively protect because of the short circuit that puncture causes rectifier bridge, filter capacitor, discharging resistance, can avoid again causing disconnecting because of surge current.
In sum; the utlity model has following beneficial effect: by moving the position of time miniature circuit breaker; and set up a fuse; both can effectively protect whole loop; that can avoid fully again that the misoperation of dimension miniature circuit breaker causes opens circuit; and its circuit is simple, and productive costs is low.
Description of drawings
Fig. 1 is the schematic diagram of existing elevator low-voltage DC supply system;
Fig. 2 is a schematic diagram of the present utility model;
Fig. 3 is the schematic diagram that existing elevator low-voltage DC supply system is carried out improved another program.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
In the embodiment shown in Figure 2, a kind of elevator supply of the present utility model system, comprise voltage transformer b and rectifying circuit, input end at voltage transformer b is provided with main miniature circuit breaker a, to prevent short circuit effectively because of voltage transformer b, the fault that overload causes, described rectifying circuit is made up of rectifier bridge d and the filter capacitor e and the discharging resistance f that are connected in parallel on rectifier bridge d mouth, be connected with the input end of rectifier bridge d behind fuse h of mouth serial connection of voltage transformer b, the rated current of fuse h is 1.2 times of loop rated current, is connected with load g behind one miniature circuit breaker c of mouth series connection of rectifying circuit.The utility model will have filter capacitor e, the discharging resistance f back of inferior miniature circuit breaker c position from having moved on to rectifying circuit between voltage transformer b and the rectifier bridge d in the design now; can carry out the actv. protection to load g by inferior miniature circuit breaker c on the one hand; can thoroughly avoid simultaneously powered on moment, because of the surge current of filter capacitor e causes time miniature circuit breaker c misoperation and cutoff circuit in system.The alternating-current voltage/AC voltage of 380V is also exported the vdc of 30V after the rectification of process rectifying circuit through the transformation of voltage transformer b, so that be that calling, demonstration even load g power.In addition, because that voltage transformer b sets up pulsewidth time of time ratio surge current in magnetic field is long, therefore, surge current can't cause the misoperation of the main miniature circuit breaker a of voltage transformer b front end; And the turnoff time of fuse h is greater than the pulsewidth of surge current, and therefore, when pulsewidth was about 6 milliseconds surge current and comes, the fuse of fuse h can't fuse, thereby can guarantee the normal operation of system.Further, fuse h can carry out the actv. protection to the short circuit that rectifier bridge d, filter capacitor e, discharging resistance f cause because of puncture.Certainly, we can also eliminate the impact of surge current to inferior miniature circuit breaker c by other design plans, to avoid the misoperation of time miniature circuit breaker c.For example, we can increase a resistance k (specifically referring to Fig. 3) at the front end of existing design-calculated capacitance/resistance shown in Figure 1, are used to suppress surge current, and inferior miniature circuit breaker c has then kept original defencive function.But the defective that resistance k generated heat for a long time and can reduce the load end loop voltage when there was system works in this design plan.
Claims (3)
1. elevator supply system, comprise voltage transformer and rectifying circuit, input end at voltage transformer is provided with main miniature circuit breaker, described rectifying circuit is made up of rectifier bridge and the filter capacitor and the discharging resistance that are connected in parallel on rectification bridge output end, the mouth of voltage transformer is connected with the input end of rectifier bridge, the mouth of rectifying circuit is connected with load, it is characterized in that, is in series with miniature circuit breaker (c) between the mouth of rectifying circuit and load (g) one time.
2. elevator supply according to claim 1 system is characterized in that, is in series with a fuse (h) between the input end of the mouth of voltage transformer (b) and rectifier bridge (d).
3. elevator supply according to claim 2 system is characterized in that the rated current of described fuse (h) is 1.2 times of loop rated current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203181357U CN201587779U (en) | 2009-12-23 | 2009-12-23 | Power supply system of elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203181357U CN201587779U (en) | 2009-12-23 | 2009-12-23 | Power supply system of elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201587779U true CN201587779U (en) | 2010-09-22 |
Family
ID=42747546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203181357U Expired - Lifetime CN201587779U (en) | 2009-12-23 | 2009-12-23 | Power supply system of elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201587779U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102655328A (en) * | 2011-03-01 | 2012-09-05 | 无锡市展鹏科技有限公司 | Error-free voltage-stabilizing method of special frequency converter for motor |
| CN105610135A (en) * | 2016-03-30 | 2016-05-25 | 天津瑞能电气有限公司 | Protection device applied to power system control power supply |
-
2009
- 2009-12-23 CN CN2009203181357U patent/CN201587779U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102655328A (en) * | 2011-03-01 | 2012-09-05 | 无锡市展鹏科技有限公司 | Error-free voltage-stabilizing method of special frequency converter for motor |
| CN105610135A (en) * | 2016-03-30 | 2016-05-25 | 天津瑞能电气有限公司 | Protection device applied to power system control power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100922 |
|
| CX01 | Expiry of patent term |