CN204349430U - The current protection system of direct current machine - Google Patents
The current protection system of direct current machine Download PDFInfo
- Publication number
- CN204349430U CN204349430U CN201520064940.7U CN201520064940U CN204349430U CN 204349430 U CN204349430 U CN 204349430U CN 201520064940 U CN201520064940 U CN 201520064940U CN 204349430 U CN204349430 U CN 204349430U
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- current
- direct current
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- shunt
- watch
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Abstract
The utility model discloses a kind of current protection system of direct current machine; it comprises shunt, DC commutator, direct current machine, Intelligent current watch-dog and relay; shunt connects direct current machine by DC commutator; Intelligent current watch-dog is connected with shunt, relay; relay connects direct current machine; when Intelligent current watch-dog detects the current overload of shunt, Intelligent current watch-dog control relay cuts off direct current machine.Direct current machine current protection system utilizes Intelligent current watch-dog as system power control unit, by detecting shunt electric current, real-time monitoring system loop current.This protection system certainty of measurement is high, and the reaction time is fast, can realize overcurrent warning, breaking protection function.Improve reliability and the fail safe of system.
Description
Technical field
The utility model belongs to current protection system, is specifically related to a kind of current protection system of direct current machine.
Background technology
Direct current machine power output is by load effect, and when the load is small, power of motor is little, otherwise power is large.When load is infinitely great, system power rises rapidly, causes motor damage.For ensureing the useful life of direct current machine, conventional safeguard measure is connected in series fusible link, thermal protector or current-limiting relay etc. in the loop.Several safeguard way can be avoided damaging motor because of current overload in loop above, but the reaction time is comparatively slow, and corresponding temporary impact current protection is poor.
Summary of the invention
In order to overcome the above-mentioned defect that prior art field exists; the purpose of this utility model is; a kind of current protection system of direct current machine is provided; can real-time monitoring system electric current; open circuit control is carried out to overload current in loop; reaction time is short, and reliability is high, avoids impulse current to the infringement in loop.
The current protection system of the direct current machine that the utility model provides; it comprises shunt, DC commutator, direct current machine, Intelligent current watch-dog and relay; shunt connects direct current machine by DC commutator; Intelligent current watch-dog is connected with shunt, relay; relay connects direct current machine; when Intelligent current watch-dog detects the current overload of shunt, Intelligent current watch-dog control relay cuts off direct current machine.Wherein, Intelligent current watch-dog is current relay.
The current protection system of the direct current machine that the utility model provides, its beneficial effect is, direct current machine current protection system utilizes Intelligent current watch-dog as system power control unit, by detecting shunt electric current, real-time monitoring system loop current.This protection system certainty of measurement is high, and the reaction time is fast, can realize overcurrent warning, breaking protection function.Improve reliability and the fail safe of system.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the utility model embodiment;
Fig. 2 is the electrical schematic diagram of the utility model embodiment.
Mark in figure:
1. DC commutator; 2. shunt; 3. direct current machine; 4. relay; 5. Intelligent current watch-dog.
Embodiment
With reference to the accompanying drawings, in conjunction with an embodiment, the current protection system of the direct current machine that the utility model provides is described in detail.
Embodiment
With reference to Fig. 1-Fig. 2; the current protection system of the direct current machine of the present embodiment; it comprises shunt 2, DC commutator 1, direct current machine 3, Intelligent current watch-dog 5 and relay 4; DC commutator 1, shunt 2, relay 4, Intelligent current watch-dog 5 are arranged on fixed head, and direct current machine 3 is arranged on a joint guide rail.Intelligent current watch-dog 5 is connected with shunt 2, relay 4; relay 4 connects direct current machine 3; shunt 2 is serially connected in direct current machine 3 anode by DC commutator 1; Intelligent current watch-dog 5 is utilized to detect shunt 2 electric current; judge whether system transships; when Intelligent current watch-dog 5 detects the current overload of shunt 2, Intelligent current watch-dog 5 control relay 4 cuts off direct current machine 3 power supply, protection direct current machine 3 life-span.Wherein, Intelligent current watch-dog 5 is current relay.
During work, when systems are functioning properly, direct current machine 3 electric current in rated range, current relay
,
contact separation, relay 4 coil without electricity, contact
with normally-closed contact
connect, direct current machine 3 runs well.When loop current increases severely, current relay
,
shunt 2 electric current is detected in contact, when current value reaches the maximum that system allows, and contact
,
get an electric shock closed, the conducting of relay 4 coil, contact
,
conducting, the pressure drop of DC commutator 1 coil is constant, and direct current machine 3 stops action.
Claims (2)
1. the current protection system of a direct current machine; it is characterized in that: it comprises shunt, DC commutator, direct current machine, Intelligent current watch-dog and relay; shunt connects direct current machine by DC commutator; Intelligent current watch-dog is connected with shunt, relay; relay connects direct current machine; when Intelligent current watch-dog detects the current overload of shunt, Intelligent current watch-dog control relay cuts off direct current machine.
2. the current protection system of direct current machine according to claim 1, is characterized in that: Intelligent current watch-dog is current relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520064940.7U CN204349430U (en) | 2015-01-30 | 2015-01-30 | The current protection system of direct current machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520064940.7U CN204349430U (en) | 2015-01-30 | 2015-01-30 | The current protection system of direct current machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204349430U true CN204349430U (en) | 2015-05-20 |
Family
ID=53232673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520064940.7U Active CN204349430U (en) | 2015-01-30 | 2015-01-30 | The current protection system of direct current machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204349430U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555851A (en) * | 2020-04-26 | 2021-10-26 | 浙江阜康机械有限公司 | High-precision overcurrent protector of electric capstan |
-
2015
- 2015-01-30 CN CN201520064940.7U patent/CN204349430U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555851A (en) * | 2020-04-26 | 2021-10-26 | 浙江阜康机械有限公司 | High-precision overcurrent protector of electric capstan |
| CN113555851B (en) * | 2020-04-26 | 2023-12-08 | 浙江阜康机械有限公司 | High-precision overcurrent protector of electric winch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |