CN202221890U - Lightening proof circuit used for DC motor and main power source return circuit - Google Patents
Lightening proof circuit used for DC motor and main power source return circuit Download PDFInfo
- Publication number
- CN202221890U CN202221890U CN2011203133187U CN201120313318U CN202221890U CN 202221890 U CN202221890 U CN 202221890U CN 2011203133187 U CN2011203133187 U CN 2011203133187U CN 201120313318 U CN201120313318 U CN 201120313318U CN 202221890 U CN202221890 U CN 202221890U
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- surge absorber
- circuit
- surge
- series arm
- electric capacity
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Abstract
The utility model discloses a lightening proof circuit used for a DC motor. The lightening proof circuit includes a first surge absorber, a second surge absorber and a third surge absorber, wherein the second surge absorber connects with the third surge absorber in series first and then the first surge absorber and the third surge absorber connects with the first surge absorber in parallel. An input terminal of the parallel circuit connects with an AC power source while an output terminal of the parallel circuit connects with an input terminal of a power source return circuit of the motor. The lightening proof circuit used for the DC motor in the utility model can resist lightening and has strong anti-interference capability. The utility model also discloses a main power source return circuit based on the above lightening proof circuit.
Description
Technical field
The utility model belongs to machine field, and particularly a kind of lightning prevention circuit that is used for dc brushless motor is applicable in the various supply air systems.
Background technology
In actual life; The interference of thunder and lightning is very big to the mankind's life harm, and it not only damages trees, forest, house and building, also electronic and electrical equipment is caused very big infringement and destruction; And the interference of irresistible thunderbolt at all of existing direct current machine and control loop; Be easy to damaged, not only influence is produced and life, and equipment maintenance cost is high.
In order to overcome aforesaid drawbacks, method in common is to rely on some external connection electrical apparatus equipment at present, but can increase the equipment use cost like this, haves much room for improvement.
The utility model content
The main purpose of the utility model is to provide a kind of lightning prevention circuit and main power circuit that is used for direct current machine, and it can resist thunderbolt, and antijamming capability is strong.
The utility model is for solving above technical problem, and the technical scheme that is adopted is:
A kind of lightning prevention circuit that is used for direct current machine; Comprise first, second and third surge absorber, wherein, parallelly connected with first surge absorber again after second and third surge absorber is in series; The input of said parallel circuits connects AC power, and output connects the input in motor power loop.
A kind of main power circuit based on aforementioned lightning prevention circuit; Comprise first, second and third grade reduction voltage circuit and the rectification circuit that connect successively; Wherein, first order reduction voltage circuit comprises first, second and third surge absorber and first, second and third electric capacity, and first and second surge absorber is connected each other and constituted first series arm; First and second electric capacity is connected each other and is constituted second series arm, and aforementioned first and second series arm, the 3rd electric capacity, the 3rd surge absorber are parallel with one another; Second level reduction voltage circuit comprises the first transformation coil and fourth, fifth, six surge absorbers; Wherein, Fourth, fifth surge absorber is connected each other and is constituted the 3rd series arm, and the described first transformation coil, the 3rd series arm and the 6th surge absorber be parallel connection successively; Third level reduction voltage circuit comprises the second transformation coil, the 7th, eight, nine surge absorbers and the 4th electric capacity; Wherein, Seven, eight surge absorbers are connected each other and are constituted the 4th series arm, and the second transformation coil, the 4th series arm, the 4th electric capacity and the 9th surge absorber be parallel connection successively; The output of said third level reduction voltage circuit connects the input of rectification circuit.
After adopting such scheme, the utility model not only can be resisted the thunderbolt of 6KV, can also pass through electrostatic discharge testing, electromagnetic compatibility test and dielectric voltage withstand test etc.
Description of drawings
Fig. 1 is the basic circuit diagram of the utility model;
Fig. 2 is a kind of particular circuit configurations figure of the utility model.
Embodiment
Below will combine accompanying drawing, the technical scheme of the utility model will be elaborated.
As shown in Figure 1, the utility model provides a kind of lightning prevention circuit that is used for direct current machine, comprises first, second and third surge absorber; Wherein, second and third surge absorber is connected each other, forms series arm; First surge absorber is parallelly connected with aforementioned series arm; Form parallel circuits, the input of said parallel circuits connects AC power, and output connects the input in motor power loop; Like this; When ac power input end got into, first, second and third surge absorber utilized its good non-line characteristic, through-current capacity is big, the residual voltage level is low, action is fast and do not have characteristics such as afterflow as the thunder and lightning interference signal, and protection rear end electronic product is avoided being struck by lightning and brought out the influence of the surging that is produced.
Please refer to shown in Figure 2ly again,, also on the circuit structure basis of aforementioned surge absorber, increase other electronic device in order further to improve the voltage that bears of the utility model; Be configured for the main power circuit of direct current machine; Specifically, described main power circuit comprises first, second and third grade reduction voltage circuit and the rectification circuit that connects successively, wherein; First order reduction voltage circuit comprises first, second and third surge absorber and first, second and third electric capacity; First and second surge absorber is connected each other, and first and second electric capacity is connected each other, and aforementioned two series arms, the 3rd electric capacity, the 3rd surge absorber are parallel with one another; Second level reduction voltage circuit comprises the first transformation coil and fourth, fifth, six surge absorbers; Wherein, Fourth, fifth surge absorber is connected each other, the parallel connection successively of series arm that the described first transformation coil, fourth, fifth surge absorber constitute and the 6th surge absorber; Third level reduction voltage circuit comprises the second transformation coil, the 7th, eight, nine surge absorbers and the 4th electric capacity; Wherein, Seven, eight surge absorbers are connected each other, series arm, the 4th electric capacity and the 9th surge absorber that the second transformation coil, the 7th, eight surge absorbers constitute parallel connection successively; The output of said third level reduction voltage circuit connects the input of rectification circuit.
During work; When the thunder and lightning interference signal of 6KV when ac power input end inserts; Three grades of reduction voltage circuits in the utility model main power circuit cooperatively interact; Suppress the thunderbolt interference signal gradually, make the interference signal that is added to rectification circuit input end in safe range, do not influence the operate as normal of direct current machine.
When the electrostatic interference signal when ac power input end inserts; Surge absorber in the utility model main power circuit utilizes avalanche theory; Play the effect of shunting pressure limiting with the reaction speed of P level second, thereby protect load not to be destroyed, do not influence the operate as normal of direct current machine.
When the electromagnetic interference signal of the electromagnetic interference signal of outside or direct current machine itself when ac power input end inserts; Electric capacity in the main power circuit and loop construction are used to suppress interference signal; Make the outside unlikely operate as normal that influences direct current machine of interference signal, and the interference signal that direct current machine itself produces can not have influence on load.
In addition, surge absorber in the utility model main power circuit and capacitor element can be played the effect of insulation again, satisfy the dielectric strength of direct current machine, guarantee personal safety.
Above embodiment is merely the technological thought of explanation the utility model; Can not limit the protection range of the utility model with this; Every technological thought that proposes according to the utility model, any change of on the technical scheme basis, being done all falls within the utility model protection range.
Claims (2)
1. lightning prevention circuit that is used for direct current machine; It is characterized in that: comprise first, second and third surge absorber; Wherein, Parallelly connected with first surge absorber again after second and third surge absorber is in series, the input of said parallel circuits connects AC power, and output connects the input in motor power loop.
2. main power circuit based on aforementioned lightning prevention circuit; It is characterized in that: comprise first, second and third grade reduction voltage circuit and the rectification circuit that connect successively; Wherein, first order reduction voltage circuit comprises first, second and third surge absorber and first, second and third electric capacity, and first and second surge absorber is connected each other and constituted first series arm; First and second electric capacity is connected each other and is constituted second series arm, and aforementioned first and second series arm, the 3rd electric capacity, the 3rd surge absorber are parallel with one another; Second level reduction voltage circuit comprises the first transformation coil and fourth, fifth, six surge absorbers; Wherein, Fourth, fifth surge absorber is connected each other and is constituted the 3rd series arm, and the described first transformation coil, the 3rd series arm and the 6th surge absorber be parallel connection successively; Third level reduction voltage circuit comprises the second transformation coil, the 7th, eight, nine surge absorbers and the 4th electric capacity; Wherein, Seven, eight surge absorbers are connected each other and are constituted the 4th series arm, and the second transformation coil, the 4th series arm, the 4th electric capacity and the 9th surge absorber be parallel connection successively; The output of said third level reduction voltage circuit connects the input of rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203133187U CN202221890U (en) | 2011-08-26 | 2011-08-26 | Lightening proof circuit used for DC motor and main power source return circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203133187U CN202221890U (en) | 2011-08-26 | 2011-08-26 | Lightening proof circuit used for DC motor and main power source return circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202221890U true CN202221890U (en) | 2012-05-16 |
Family
ID=46043911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203133187U Expired - Fee Related CN202221890U (en) | 2011-08-26 | 2011-08-26 | Lightening proof circuit used for DC motor and main power source return circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202221890U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315636A (en) * | 2011-08-26 | 2012-01-11 | 江苏上骐集团有限公司 | Lightning protection circuit for direct current motor and main power supply circuit |
-
2011
- 2011-08-26 CN CN2011203133187U patent/CN202221890U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315636A (en) * | 2011-08-26 | 2012-01-11 | 江苏上骐集团有限公司 | Lightning protection circuit for direct current motor and main power supply circuit |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120516 Termination date: 20200826 |