CN204465401U - A kind of excitation additional device for variable speed constant frequency motor - Google Patents
A kind of excitation additional device for variable speed constant frequency motor Download PDFInfo
- Publication number
- CN204465401U CN204465401U CN201520082979.1U CN201520082979U CN204465401U CN 204465401 U CN204465401 U CN 204465401U CN 201520082979 U CN201520082979 U CN 201520082979U CN 204465401 U CN204465401 U CN 204465401U
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- thyristor
- anode
- negative electrode
- thyristors
- excitation
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Abstract
The utility model discloses a kind of excitation additional device for variable speed constant frequency motor, be connected between common excitation unit and pole coil of generator, it comprises two parallel branches, each branch road there are two series thyristors, be respectively an anode thyristor and a negative electrode thyristor, two anode thyristors share an anode, two negative electrode thyristors share a negative electrode, two common anode pole thyristor contacts connect the anode of excitation unit output, two common cathode thyristor contacts connect the negative electrode of excitation unit output, contact is drawn between the thyristor of two branch roads, connect the two ends of pole coil of generator respectively, in pole coil of generator, the sense of current is by each turn on thyristors, turn off and realize conversion.The utility model is connected to the attachment device between common excitation unit and variable speed constant frequency motor, can meet the excitation needs of variable speed constant frequency motor after common excitation unit adopts attachment device of the present utility model.
Description
Technical field
The utility model relates to a kind of excitation additional device, particularly relates to a kind of excitation additional device for variable speed constant frequency motor.
Background technology
What the excitation unit that generation current machine uses exported is direct current, and variable speed constant frequency motor excitation needs to use square wave current, and thus current excitation unit can not meet variable speed constant frequency motor excitation needs.
Utility model content
In order to overcome current excitation unit export be direct current, do not meet the needs that variable speed constant frequency motor excitation uses square wave current excitation, the utility model provides a kind of attachment device be connected between common excitation unit and motor, common excitation unit is exported the square wave current that direct current changes variable speed constant frequency motor excitation needs into by it, run under making generating unit speed can have the rotating speed of optimum efficiency according to prime mover or driven machine, thus energy utilization rate is maximized.
The utility model solves the technical scheme that its technical problem adopts: a kind of excitation additional device for variable speed constant frequency motor, be connected between common excitation unit and pole coil of generator, it comprises two parallel branches, each branch road there are two series thyristors, be respectively an anode thyristor and a negative electrode thyristor, two anode thyristors share an anode, two negative electrode thyristors share a negative electrode, two common anode pole thyristor contacts connect the anode of excitation unit output, two common cathode thyristor contacts connect the negative electrode of excitation unit output, contact is drawn between the thyristor of two branch roads, connect the two ends of pole coil of generator respectively, in pole coil of generator, the sense of current is by each turn on thyristors, turn off and realize conversion.
Preferably, two common anode pole thyristors are respectively first anode thyristor and second plate thyristor, and two common cathode thyristors are respectively the first negative electrode thyristor and the second negative electrode thyristor.
Preferably, described pole coil of generator one end connects between first anode thyristor and the first negative electrode thyristor, and the pole coil of generator other end connects between second plate thyristor and the second negative electrode thyristor.
The utility model is connected to the attachment device between common excitation unit and variable speed constant frequency motor, and common excitation unit is exported the square wave current that direct current changes variable speed constant frequency motor excitation needs into by it.The excitation needs of variable speed constant frequency motor can be met after common excitation unit adopts attachment device of the present utility model.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
1. first anode thyristors in figure, 2. the second negative electrode thyristor, 3. second plate thyristor, 4. the first negative electrode thyristor, 5. pole coil of generator.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, but is not the restriction to the utility model protection range.
As shown in Figure 1, a kind of excitation additional device for variable speed constant frequency motor, be connected between common excitation unit and pole coil of generator 5, it comprises two parallel branches, each branch road there are two series thyristors, be respectively an anode thyristor and a negative electrode thyristor, two anode thyristors share an anode, two negative electrode thyristors share a negative electrode, two common anode pole thyristor contacts connect the anode of excitation unit output, two common cathode thyristor contacts connect the negative electrode of excitation unit output, contact is drawn between the thyristor of two branch roads, connect the two ends of pole coil of generator 5 respectively, in pole coil of generator 5, the sense of current is by each turn on thyristors, turn off and realize conversion.Two common anode pole thyristors are respectively first anode thyristor 1 and second plate thyristor 3, two common cathode thyristors are respectively the first negative electrode thyristor 4 and the second negative electrode thyristor 2.Pole coil of generator 5 one end connects between first anode thyristor 1 and the first negative electrode thyristor 4, and pole coil of generator 5 other end connects between second plate thyristor 3 and the second negative electrode thyristor 2.
When the utility model uses, first anode thyristor 1, second plate thyristor 3 common anode pole lead contact are labeled as "+", second negative electrode thyristor 2, first negative electrode thyristor 4 common cathode lead contact is labeled as "-", between first anode thyristor 1, first negative electrode thyristor 4, lead-out wire contact is labeled as " A ", between second plate thyristor 3, second negative electrode thyristor 2, lead-out wire contact is labeled as " B ", "+" connects the anode that excitation unit exports, "-" connects the negative electrode that excitation unit exports, and " A ", " B " connect the two ends of pole coil of generator 5 respectively.Under second plate thyristor 3, first negative electrode thyristor 4 off state, first anode thyristor 1, second negative electrode thyristor 2 is triggering and conducting simultaneously, and exciter current of generator is flowed to " B " through pole coil of generator 5 by " A ".The while of first anode thyristor 1, second negative electrode thyristor 2 under off state, second plate thyristor 3, first negative electrode thyristor 4 triggering and conducting, motor energization current is flowed to " A " through pole coil of generator 5 by " B ".First anode thyristor 1, second negative electrode thyristor 2 is one group, and second plate thyristor 3, first negative electrode thyristor 4 is one group, and conducting or the shutoff of the thyristor often organized are kept strokes, and the action between two groups is contrary: namely one group closes another group conducting at once of having no progeny.Two groups of thyristors replace shutoff, conducting, for the pole coil of variable speed constant frequency motor provides square wave current by motor excitation requirement rule.One group leader's phase conducting, another group leader's phase can be synchronous operation common electric machine pole coil and power when turning off.
Claims (3)
1. the excitation additional device for variable speed constant frequency motor, be connected between common excitation unit and pole coil of generator, it is characterized in that: it comprises two parallel branches, each branch road there are two series thyristors, be respectively an anode thyristor and a negative electrode thyristor, two anode thyristors share an anode, two negative electrode thyristors share a negative electrode, two common anode pole thyristor contacts connect the anode of excitation unit output, two common cathode thyristor contacts connect the negative electrode of excitation unit output, contact is drawn between the thyristor of two branch roads, connect the two ends of pole coil of generator respectively, in pole coil of generator, the sense of current is by each turn on thyristors, turn off and realize conversion.
2. a kind of excitation additional device for variable speed constant frequency motor according to claim 1, it is characterized in that: two common anode pole thyristors are respectively first anode thyristor and second plate thyristor, two common cathode thyristors are respectively the first negative electrode thyristor and the second negative electrode thyristor.
3. a kind of excitation additional device for variable speed constant frequency motor according to claim 2, it is characterized in that: described pole coil of generator one end connects between first anode thyristor and the first negative electrode thyristor, and the pole coil of generator other end connects between second plate thyristor and the second negative electrode thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520082979.1U CN204465401U (en) | 2015-02-06 | 2015-02-06 | A kind of excitation additional device for variable speed constant frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520082979.1U CN204465401U (en) | 2015-02-06 | 2015-02-06 | A kind of excitation additional device for variable speed constant frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204465401U true CN204465401U (en) | 2015-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520082979.1U Expired - Fee Related CN204465401U (en) | 2015-02-06 | 2015-02-06 | A kind of excitation additional device for variable speed constant frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204465401U (en) |
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2015
- 2015-02-06 CN CN201520082979.1U patent/CN204465401U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20150708 Termination date: 20220206 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |