CN201918905U - Three-phase AC voltage regulation circuit with single controllable tube - Google Patents
Three-phase AC voltage regulation circuit with single controllable tube Download PDFInfo
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- CN201918905U CN201918905U CN201120013848XU CN201120013848U CN201918905U CN 201918905 U CN201918905 U CN 201918905U CN 201120013848X U CN201120013848X U CN 201120013848XU CN 201120013848 U CN201120013848 U CN 201120013848U CN 201918905 U CN201918905 U CN 201918905U
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- phase
- voltage regulation
- regulation circuit
- rectifier bridge
- switch tube
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Abstract
The utility model discloses a three-phase AC voltage regulation circuit with a single controllable tube and belongs to the technical field of electric engineering technology. The voltage regulation circuit comprises a three-phase rectifier bridge formed by six diodes and an automatic on-off switch tube. The drain electrode of the automatic on-off switch tube is connected with the positive output end of the DC side of the rectifier bridge, and the source electrode of the automatic on-off switch tube is connected with the negative output end of the DC side of the rectifier bridge; and the entire voltage regulation circuit is connected with the connection point of the star-connect three-phase load. In the utility model, a chopping voltage regulation circuit does not need to detect the phase position and the direction of the AC, instead, only a controllable switch tube is required. The voltage regulation circuit has the advantages of simple control method, lower cost and the like, realizes the high-frequency chopping voltage regulation, eliminates the low frequency secondary harmonic wave, has little pollution to the power network, is suitable for adjusting the voltage and the power of the three-phase star-connect resistance load of large-power and middle-power.
Description
Technical field
The utility model relates to a kind of three-phase ac voltage regulation circuit that is applied to the alternating voltage electric power system, can carry out the high frequency chopping pressure regulation to resistive load, belongs to the technical field of electrical engineering technology.
Background technology
Three-phase ac voltage regulation circuit is widely used for centering, voltage and power adjustments are carried out in powerful threephase load.Traditional three phase voltage regulating circuit is every to adopt two antiparallel thyristors mutually, as shown in Figure 1, wherein, T1, T2, T3, T4, T5, T6 are six thyristors, R1, R2, R3 are the three-phase resistive load of Y-connection, by regulating the delay angle of opening of thyristor, can regulate the effective voltage that is added in the load.But the shortcoming of sort circuit is: the output waveform distortion, produce the low frequency subharmonic that is difficult to leach, and the control relative complex of six gate-controlled switches, cost is higher.
Summary of the invention
The purpose of this utility model is to overcome the defective that exists in the above-mentioned three phase ac voltage regulation technology, design a kind of three-phase voltage regulation circuit of chopping that has only a gate-controlled switch, can realize high frequency chopping control, eliminate the low frequency subharmonic, reduce control difficulty and regulating circuit cost, be applicable to the resistive load of big or middle power three-phase Y-connection is carried out voltage and power adjustments.
To achieve these goals, the technical scheme taked of the utility model is as follows:
But a kind of three-phase list keyholed back plate AC voltage adjusting circuit, comprise three-phase commutation bridge and the self-on-off switching tube formed by six diodes, the drain electrode of self-on-off switching tube connects the positive output end of described rectifier bridge DC side, and the source electrode of self-on-off switching tube connects the negative output terminal of described rectifier bridge DC side; Described regulating circuit is connected on the tie point place of the threephase load of Y-connection.
Three-phase ac voltage regulation circuit of the present utility model has the following advantages: 1) need not detect the direction and the phase place of alternating current, need not synchronizing signal, and control method is simple; 2) the three phase voltage regulating circuit only needs a controlled tr tube, and cost significantly reduces; 3) can realize the high frequency chopping pressure regulation, can eliminate the low frequency subharmonic, the high-frequency harmonic that is produced is easy to be eliminated by the filter in the electric power system, and is little to electric network pollution.
Description of drawings
Fig. 1 is a three phase voltage regulating circuit diagram traditional in the prior art.
Fig. 2 is the circuit diagram of the utility model three-phase ac voltage regulation circuit.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further details.
As shown in Figure 2, adopt six diode D1, D2, D3, D4, D5, D6 to form three-phase and do not control rectifier bridge, DC side at rectifier bridge is provided with a self-on-off switching tube T1, as IGBT, IGCT, GTO etc., the drain electrode of self-on-off switching tube T1 is connect the positive output end of DC side, and its source electrode connects the negative output terminal of DC side.Use the high-frequency impulse control self-on-off switching tube T1 of EDM Generator of Adjustable Duty Ratio, promptly can control the effective voltage that is added on the three-phase resistive load, the R1 among the figure, R2, R3 are the three-phase resistive load of Y-connection.
Claims (1)
1. but three-phase list keyholed back plate AC voltage adjusting circuit, comprise three-phase commutation bridge and the self-on-off switching tube (T1) formed by six diodes (D1-D6), it is characterized in that: the drain electrode of self-on-off switching tube (T1) connects the positive output end of described rectifier bridge DC side, and the source electrode of self-on-off switching tube (T1) connects the negative output terminal of described rectifier bridge DC side; Described regulating circuit is connected on the tie point place of the threephase load of Y-connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120013848XU CN201918905U (en) | 2011-01-18 | 2011-01-18 | Three-phase AC voltage regulation circuit with single controllable tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120013848XU CN201918905U (en) | 2011-01-18 | 2011-01-18 | Three-phase AC voltage regulation circuit with single controllable tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201918905U true CN201918905U (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120013848XU Expired - Fee Related CN201918905U (en) | 2011-01-18 | 2011-01-18 | Three-phase AC voltage regulation circuit with single controllable tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201918905U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618489A (en) * | 2013-11-07 | 2014-03-05 | 陕西科技大学 | Dodecagon space voltage vector control soft starter and control method thereof |
| CN105141142A (en) * | 2015-09-28 | 2015-12-09 | 国网甘肃省电力公司 | Resistive-load digital alternating-current high-frequency chopper power control circuit |
-
2011
- 2011-01-18 CN CN201120013848XU patent/CN201918905U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618489A (en) * | 2013-11-07 | 2014-03-05 | 陕西科技大学 | Dodecagon space voltage vector control soft starter and control method thereof |
| CN103618489B (en) * | 2013-11-07 | 2015-12-09 | 陕西科技大学 | A kind of 12 limit shape space voltage vector control soft initiator and control methods thereof |
| CN105141142A (en) * | 2015-09-28 | 2015-12-09 | 国网甘肃省电力公司 | Resistive-load digital alternating-current high-frequency chopper power control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20140118 |