CN212137571U - Control device of variable-frequency generator - Google Patents
Control device of variable-frequency generator Download PDFInfo
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- CN212137571U CN212137571U CN202021175587.7U CN202021175587U CN212137571U CN 212137571 U CN212137571 U CN 212137571U CN 202021175587 U CN202021175587 U CN 202021175587U CN 212137571 U CN212137571 U CN 212137571U
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- 238000010248 power generation Methods 0.000 description 4
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Abstract
The utility model provides a control device of a variable frequency generator, which comprises a direct current power supply, a booster circuit, a filter inductor, an inverter bridge circuit, a drive circuit and a magneto which are connected in sequence; the magneto, the rectifier circuit, the inverter bridge circuit and the filter inductor are connected in sequence; the booster circuit is used for boosting the initial direct current output by the direct current power supply into a first direct current; the filter inductor and the inverter bridge circuit are used for boosting the first direct current into second direct current; the driving circuit is used for converting the second direct current into driving alternating current; the magneto is used for rotating according to the driving alternating current and outputting three-phase alternating current; the rectifying circuit is used for rectifying the three-phase alternating current into third direct current; the inverter bridge circuit and the filter inductor are also used for converting the third direct current into target alternating current. The existing structure is utilized, other circuits and components with high withstand voltage do not need to be additionally arranged, the electric starting of the generator is realized, and the cost is reduced under the condition that the working efficiency is not influenced.
Description
Technical Field
The utility model relates to a generator field especially relates to a variable frequency generator controlling means.
Background
With the development of science and technology, the frequency conversion generator is widely used due to the small size, light weight and convenient carrying, and the frequency of the three-phase alternating current output by the magneto is 400-750HZ, and the voltage is 300-540V, so that the frequency conversion generator cannot be directly used by users, and therefore, a corresponding rectifying circuit and an inverter appear, the three-phase alternating current can be converted into common civil alternating current, and the requirements of the users are met.
At the starting stage of the generator, a direct current power supply is mostly adopted to drive the direct current motor, and then the direct current motor drives the magneto to drive, so that the starting of the generator is completed, the direct current motor is additionally arranged, the weight of the whole generator is increased, the service life is shortened, and the starting efficiency is low. In some existing schemes, a direct-drive magnetic motor started by electricity is also provided, so that a direct-current motor is omitted, but the existing electric drive needs to boost the voltage of a direct-current power supply to more than 150V by additionally arranging a booster circuit, components needing to be adopted have withstand voltage of more than 200V, and basically only imported components can be adopted, so that the cost is too high.
SUMMERY OF THE UTILITY MODEL
To the not enough that exists among the prior art, the utility model provides a frequency conversion genertrix controlling means.
In one embodiment, the utility model provides a variable frequency generator control device, which comprises a direct current power supply, a booster circuit, a filter inductor, an inverter bridge circuit, a drive circuit and a magneto which are connected in sequence; the magneto, the rectifier circuit, the inverter bridge circuit and the filter inductor are connected in sequence;
the booster circuit is used for boosting the initial direct current output by the direct current power supply into a first direct current;
the filter inductor and the inverter bridge circuit are used for boosting the first direct current output by the booster circuit into second direct current;
the driving circuit is used for converting the second direct current output by the inverter bridge circuit into driving alternating current;
the magneto is used for rotating according to the driving alternating current output by the driving circuit and outputting three-phase alternating current;
the rectification circuit is used for rectifying the three-phase alternating current output by the magneto into third direct current;
the inverter bridge circuit and the filter inductor are also used for converting the third direct current output by the rectifying circuit into target alternating current.
In one embodiment, the rectifying circuit is mainly composed of three thyristors and three diodes.
In one embodiment, the driving circuit mainly comprises three pairs of MOS tubes, and the three-phase output end of the magneto is respectively connected with the three pairs of MOS tubes.
In one embodiment, the control device of the variable frequency generator further comprises an MCU controller, a first relay for controlling the on-off between the booster circuit and the filter inductor, a second relay for controlling the on-off between the inverter bridge circuit and the drive circuit, and a third relay for controlling the on-off between the drive circuit and the magneto; the first relay, the second relay and the third relay are respectively connected with the MCU controller.
In one embodiment, the utility model provides a variable frequency generator control device, which comprises a direct current power supply, a booster circuit, a filter inductor, an inverter bridge circuit, a bidirectional conversion circuit and a magneto which are connected in sequence; the magnetor, the bidirectional conversion circuit, the inverter bridge circuit and the filter inductor are sequentially connected;
the booster circuit is used for boosting the initial direct current output by the direct current power supply into a first direct current;
the filter inductor and the inverter bridge circuit are used for boosting the first direct current output by the booster circuit into second direct current;
the bidirectional conversion circuit is used for converting the second direct current output by the inverter bridge circuit into driving alternating current;
the magneto is used for rotating according to the driving alternating current output by the bidirectional conversion circuit and outputting three-phase alternating current;
the bidirectional conversion circuit is also used for rectifying the three-phase alternating current output by the magneto into third direct current;
the inverter bridge circuit and the filter inductor are also used for converting the third direct current output by the bidirectional conversion circuit into target alternating current.
In one embodiment, the inverter bridge circuit consists essentially of two pairs of IBGT transistors.
In one embodiment, the dc power source includes a battery that outputs 12 VDC.
In one embodiment, the control device of the variable frequency generator further comprises an MCU controller and a detection circuit; the detection circuit is used for detecting the working data of the variable-frequency generator, and the MCU is used for controlling the variable-frequency generator according to the working data input by the detection circuit.
In one embodiment, the detection circuit includes a magneto speed detection circuit coupled to the magneto.
In one embodiment, the detection circuit includes a current detection circuit coupled to the inverter bridge circuit for detecting the third direct current input to the inverter bridge circuit.
Above-mentioned variable frequency generator controlling means further fuses through going on traditional electric starting circuit and dc-to-ac converter, designs more reasonable circuit, has fully utilized current circuit structure, adopts the two-stage to step up, and wherein boost circuit need not carry out too high the step up with the direct current of direct current power supply output, only need carry on the small range can satisfy follow-up filter circuit and inverter bridge circuit's operational environment can, consequently the component ware that boost circuit needs is withstand voltage very low, and is with very low costs. In the traditional two-stage topology scheme, a second booster circuit is additionally arranged during the second-stage boosting; in the traditional topological scheme adopting the one-stage boosting, because the voltage needs to be boosted to more than 150V, the required withstand voltage is very high, and the cost is very high; therefore, only one booster circuit with very small withstand voltage and very low cost is needed, the electric starting of the generator is realized under the condition that other circuits and components with very high withstand voltage are not additionally arranged, and the cost is reduced under the condition that the working efficiency is not influenced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
fig. 1 is a schematic structural diagram of a control device of a variable frequency generator according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a control device of a variable frequency generator according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control device of a variable frequency generator according to another embodiment of the present invention.
In the above drawings: 1. a storage battery; 2. a boost circuit; 31. a filter circuit; 32. an inverter bridge circuit; 4. a drive circuit; 5. a magneto; 6. a rectifying circuit; 7. a first relay; 8. a second relay; 9. and a third relay.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, in one embodiment, the present invention provides a control device for a variable frequency generator, which includes a dc power supply, a boost circuit, a filter inductor, an inverter bridge circuit, a driving circuit, and a magnetic motor, which are connected in sequence; the magneto, the rectifier circuit, the inverter bridge circuit and the filter inductor are connected in sequence;
the booster circuit is used for boosting the initial direct current output by the direct current power supply into a first direct current;
the filter inductor and the inverter bridge circuit are used for boosting the first direct current output by the booster circuit into second direct current;
the driving circuit is used for converting the second direct current output by the inverter bridge circuit into driving alternating current;
the magneto is used for rotating according to the driving alternating current output by the driving circuit and outputting three-phase alternating current;
the rectification circuit is used for rectifying the three-phase alternating current output by the magneto into third direct current;
the inverter bridge circuit and the filter inductor are also used for converting the third direct current output by the rectifying circuit into target alternating current.
The direct current power supply, the booster circuit, the filter inductor, the inverter bridge circuit, the drive circuit and the magneto are electric starting parts, firstly the direct current power supply outputs direct current with lower voltage, namely initial direct current, and then the direct current with the voltage meeting the drive requirement, namely second direct current, is obtained after two-stage boosting operation is completed through the booster circuit, the filter inductor and the inverter bridge circuit. Particularly, in the second-stage boosting, the inverter bridge circuit and the filter inductor which are used for inverting the rectified high-voltage direct current power into the civil alternating current by the original generator are adopted in the embodiment, and the boosting circuit and related components of the second stage are not additionally added. The obtained direct current with the voltage meeting the driving requirement is converted into three-phase alternating current through the driving circuit, the three-phase alternating current can act on the magneto to enable the magneto to rotate, and under the action of the three-phase alternating current, the magneto can complete electric starting work after reaching the lowest ignition rotating speed (generally 600 RPM).
Secondly, the magneto, the rectifying circuit, the inverter bridge circuit and the filter inductor are power generation parts, the magneto can start power generation and output when the minimum working rotating speed (generally 1000RPM) is reached after the magneto is electrically started, the output three-phase alternating current is rectified into high-voltage direct current, namely third direct current, through the rectifying circuit, the obtained third direct current is inverted through the inverter bridge circuit and the filter inductor and converted into civil alternating current, and then power generation is completed.
Through further fusing traditional electric starting circuit and dc-to-ac converter, design more reasonable circuit, make full use of current circuit structure, adopt the two-stage to boost, wherein boost circuit need not carry out too high the step-up with the direct current of direct current power supply output, only need carry on the small-amplitude can satisfy follow-up filter circuit and inverter bridge circuit's operational environment can, consequently the component ware withstand voltage that boost circuit needs is very low, and is with very low costs. In the traditional two-stage topology scheme, a second-stage booster circuit is additionally arranged during second-stage boosting; in the traditional topological scheme adopting the one-stage boosting, because the voltage needs to be boosted to more than 150V, the required withstand voltage is very high, and the cost is very high; therefore, only one booster circuit with very small withstand voltage and very low cost is needed, the electric starting of the generator is realized under the condition that other circuits and components with very high withstand voltage are not additionally arranged, and the cost is reduced under the condition that the working efficiency is not influenced.
Furthermore, the scheme adopts the driving circuit and the rectifying circuit to respectively carry out DC-AC and AC-DC conversion, replaces the traditional scheme that adopts a bidirectional converter with DC-AC and AC-DC at the same time, simplifies a software control algorithm, improves the stability of the system and has strong anti-jamming capability.
As shown in fig. 2, in one embodiment, the rectifying circuit 6 is mainly composed of three thyristors and three diodes.
Compared with an MOS tube in a traditional bidirectional conversion circuit, the cost of components is lower under the same withstand voltage condition through the combination of the silicon controlled rectifier and the diode.
In one embodiment, the driving circuit 4 is mainly composed of three pairs of MOS transistors, and the three-phase output terminals of the magneto 5 are respectively connected to the three pairs of MOS transistors.
The structure of the drive circuit is basically the same as that of the traditional bidirectional converter, but the withstand voltage of the MOS transistor is different, the withstand voltage of the MOS transistor in the drive circuit only needs to meet the drive requirement and is generally 150V, and the MOS transistor of the bidirectional converter needs to convert the high-voltage three-phase alternating current output by the magneto into 380V direct current, so that the withstand voltage is very high. Therefore, compared with the traditional bidirectional converter, the cost of the driving circuit in the scheme is very low.
In one embodiment, the dc power supply includes a battery 1 outputting 12 VDC.
Wherein, the first direct current is 40-50VDC, and the second direct current is 100-150 VDC.
Fig. 2 is a diagram illustrating a connection relationship of structures for clarity, and does not show a specific physical location, wherein two magnetors 5 shown in fig. 2 are substantially the same, and are divided into two to facilitate the connection between the structures.
In one embodiment, the control device of the variable frequency generator further comprises an MCU controller and a detection circuit; the detection circuit is used for the working data of the generator, and the MCU is used for carrying out corresponding control according to the working data input by the detection circuit.
In one embodiment, the detection circuit includes a magneto speed detection circuit coupled to the magneto.
In one embodiment, the detection circuit includes a current detection circuit coupled to the inverter bridge circuit for detecting the third direct current input to the inverter bridge circuit.
In one embodiment, the control device of the variable frequency generator further comprises a first relay 7 for controlling the on-off between the booster circuit 2 and the filter inductor 31, a second relay 8 for controlling the on-off between the inverter bridge circuit 32 and the drive circuit 4, and a third relay 9 for controlling the on-off between the drive circuit 4 and the magneto 5; the first relay 7, the second relay 8 and the third relay 9 are respectively connected with the MCU controller.
The on-off of the relay can be controlled through the MCU according to the feedback of the detection circuit, so that the electric starting part and the power generation part are not interfered with each other, and the work is more stable.
As shown in fig. 3, in one embodiment, the present invention provides a variable frequency generator control apparatus, which includes a dc power supply, a voltage boost circuit, a filter inductor, an inverter bridge circuit, a bidirectional conversion circuit, and a magnetic motor, which are connected in sequence; the magnetor, the bidirectional conversion circuit, the inverter bridge circuit and the filter inductor are sequentially connected;
the booster circuit is used for boosting the initial direct current output by the direct current power supply into a first direct current;
the filter inductor and the inverter bridge circuit are used for boosting the first direct current output by the booster circuit into second direct current;
the bidirectional conversion circuit is used for converting the second direct current output by the inverter bridge circuit into driving alternating current;
the magneto is used for rotating according to the driving alternating current output by the bidirectional conversion circuit and outputting three-phase alternating current;
the bidirectional conversion circuit is also used for rectifying the three-phase alternating current output by the magneto into third direct current;
the inverter bridge circuit and the filter inductor are also used for converting the third direct current output by the bidirectional conversion circuit into target alternating current.
The difference from the above embodiments is that, in this embodiment, the design of the conventional bidirectional conversion circuit is retained. No matter a bidirectional conversion circuit is adopted or a rectifying circuit and a driving circuit are respectively adopted, for secondary boosting, the electric starting of the generator can be realized under the condition that other circuits and components with high withstand voltage are not additionally arranged, and the cost is reduced under the condition that the working efficiency is not influenced.
In this embodiment, other circuits and specific components except for the bidirectional converter are the same as those in the above embodiment, and are not described herein again.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and specific, but not intended to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A control device of a variable frequency generator is characterized by comprising a direct current power supply, a booster circuit, a filter inductor, an inverter bridge circuit, a drive circuit and a magneto which are connected in sequence; the magneto, the rectifier circuit, the inverter bridge circuit and the filter inductor are connected in sequence;
the booster circuit is used for boosting the initial direct current output by the direct current power supply into a first direct current;
the filter inductor and the inverter bridge circuit are used for boosting the first direct current output by the booster circuit into a second direct current;
the driving circuit is used for converting the second direct current output by the inverter bridge circuit into driving alternating current;
the magneto is used for rotating according to the driving alternating current output by the driving circuit and outputting three-phase alternating current;
the rectification circuit is used for rectifying the three-phase alternating current output by the magneto into third direct current;
the inverter bridge circuit and the filter inductor are also used for converting the third direct current output by the rectifying circuit into target alternating current.
2. The control device of the variable frequency generator according to claim 1, wherein the rectifying circuit is mainly composed of three thyristors and three diodes.
3. The control device of the inverter generator according to claim 1, wherein the driving circuit is mainly composed of three pairs of MOS transistors, and three phase output terminals of the magneto are respectively connected to the three pairs of MOS transistors.
4. The control device of the variable frequency generator according to claim 1, further comprising an MCU controller, a first relay for controlling the on-off between the booster circuit and the filter inductor, a second relay for controlling the on-off between the inverter bridge circuit and the drive circuit, and a third relay for controlling the on-off between the drive circuit and the magneto; the first relay, the second relay and the third relay are respectively connected with the MCU controller.
5. A control device of a variable frequency generator is characterized by comprising a direct current power supply, a booster circuit, a filter inductor, an inverter bridge circuit, a bidirectional conversion circuit and a magnetor which are connected in sequence; the magnetor, the bidirectional conversion circuit, the inverter bridge circuit and the filter inductor are sequentially connected;
the booster circuit is used for boosting the initial direct current output by the direct current power supply into a first direct current;
the filter inductor and the inverter bridge circuit are used for boosting the first direct current output by the booster circuit into a second direct current;
the bidirectional conversion circuit is used for converting the second direct current output by the inverter bridge circuit into driving alternating current;
the magneto is used for rotating according to the driving alternating current output by the bidirectional conversion circuit and outputting three-phase alternating current;
the bidirectional conversion circuit is also used for rectifying the three-phase alternating current output by the magneto into third direct current;
the inverter bridge circuit and the filter inductor are also used for converting the third direct current output by the bidirectional conversion circuit into target alternating current.
6. A variable frequency generator control apparatus according to claim 1 or claim 5 in which the inverter bridge circuit consists essentially of two pairs of IBGT tubes.
7. The inverter generator control device according to claim 1 or 5, wherein the direct-current power supply includes a secondary battery that outputs 12 VDC.
8. The control device of the variable frequency generator according to claim 1 or 5, further comprising an MCU controller and a detection circuit; the detection circuit is used for detecting working data of the variable frequency generator, and the MCU is used for controlling the variable frequency generator according to the working data input by the detection circuit.
9. The control device of a variable frequency generator according to claim 8, wherein the detection circuit comprises a magneto rotation speed detection circuit connected to the magneto.
10. The control device for a variable frequency generator according to claim 8, wherein said detection circuit comprises a current detection circuit connected to said inverter bridge circuit for detecting said third direct current inputted to said inverter bridge circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021175587.7U CN212137571U (en) | 2020-06-19 | 2020-06-19 | Control device of variable-frequency generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021175587.7U CN212137571U (en) | 2020-06-19 | 2020-06-19 | Control device of variable-frequency generator |
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| Publication Number | Publication Date |
|---|---|
| CN212137571U true CN212137571U (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021175587.7U Expired - Fee Related CN212137571U (en) | 2020-06-19 | 2020-06-19 | Control device of variable-frequency generator |
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| Country | Link |
|---|---|
| CN (1) | CN212137571U (en) |
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2020
- 2020-06-19 CN CN202021175587.7U patent/CN212137571U/en not_active Expired - Fee Related
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Granted publication date: 20201211 |