CN206274639U - A kind of variable-frequency motor rectification circuit of new SPWM controls - Google Patents
A kind of variable-frequency motor rectification circuit of new SPWM controls Download PDFInfo
- Publication number
- CN206274639U CN206274639U CN201621421989.4U CN201621421989U CN206274639U CN 206274639 U CN206274639 U CN 206274639U CN 201621421989 U CN201621421989 U CN 201621421989U CN 206274639 U CN206274639 U CN 206274639U
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- electric capacity
- operational amplifier
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- circuit
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Abstract
The utility model discloses a kind of variable-frequency motor rectification circuit of new SPWM controls, including three phase mains, the first module, the second module, inductance L1, electric capacity C4, inductance L2, electric capacity C5, the first described module includes the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, first resistor R1, first resistor R1, second resistance R2, operational amplifier A 1, operational amplifier A 2, the second described module includes six igbt V1, V2, V3, V4, V5, V6, six diodes D1, D2, D3, D4, D5, D6.The utility model circuit has good stability, reliability, by the harmonics restraint of multiple components, effectively saves electric energy loss, improves the utilization rate of the energy.
Description
Technical field
The utility model is related to machine field, especially a kind of variable-frequency motor rectification circuit of new SPWM controls.
Background technology
With the development of Power Electronic Technique so that mode of speed regulation frequency control superior in AC speed regulating field is wide
It is general to be applied in the middle of every field, and therefore variable-frequency motor is also widely used.
Variable-frequency motor is made up of frequency converter and asynchronous machine, and frequency converter is mainly responsible for the frequency of regulation alternating current generator.It is
Common power supply is become the AC power of frequency-adjustable.For variable-frequency motor is compared to direct current generator, it turns for motor
Velocity modulation section is highly efficient, meanwhile, change voltage and frequency that it can also be smoothed are ageing preferable.SPWM technologies are that control becomes
One kind in frequency device technology, with realize it is simple, supply harmonic can be effectively reduced the features such as, but due to whole frequency conversion system
In itself have a large amount of power electronic equipments so that the harmonic components in motor become increasingly complex, and harmonic pollution just becomes more
Seriously.Influence for energy saving and suppression harmonic wave to whole system, researcher has made substantial amounts of research to harmonic problem.
And rectification link is one of major harmonic source in whole output waveform of transformer, tradition uses passive filtering in grid side,
But the development of advancing by leaps and bounds of the complication and Power Electronic Technique with harmonic source, either from the design of harmonic treating apparatus
Or practical application, active filter has very big development potentiality, and it need not consider the factors such as electric network impedance, and economical
Also it is relatively good.
The content of the invention
In view of this, the purpose of this utility model is to provide a kind of variable-frequency motor rectification circuit of new SPWM controls,
To solve the problems, such as to be proposed in above-mentioned background technology.
The technical scheme that its technical problem used is solved to reach above-mentioned purpose the utility model is：A kind of new SPWM
The variable-frequency motor rectification circuit of control, including：Three phase mains, the first module, the second module, inductance L1, electric capacity C4, inductance L2,
Electric capacity C5, the three phase mains is connected with first module, and the three phase mains is described by connecting with second module
Inductance L1 is connected, in parallel with the electric capacity C4, the inductance L2, the electric capacity C5 after second module, and the electric capacity C5
Both end voltage is output voltage.
In above-mentioned technical proposal, described the first module includes the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the
Make one resistance R1, first resistor R1, second resistance R2, operational amplifier A 1, operational amplifier A 2, described first electric capacity C1 one end
It is the input of the first module, the first electric capacity C1 other ends connect described second electric capacity C2 one end, first electricity respectively
Resistance R1 one end, the input in the same direction of the operational amplifier A 1, the first resistor R1 other ends ground connection, the second electric capacity C2
The other end connects the output end of operational amplifier A 2, and the reverse input end of the operational amplifier A 1 connects the 3rd electric capacity
C3 one end, the 3rd electric capacity C3 other ends respectively with described second resistance R2 one end, the operational amplifier A 2 it is in the same direction defeated
Enter end connection, the reverse input end ground connection of the operational amplifier A 2, the second resistance R2 other ends connect the computing and put
The output end of big device A2, due to being three-phase circuit, therefore the circuit of the above has three, is connected using triangle between circuit and circuit
Connect.
In above-mentioned technical proposal, described the second module include six igbt V1, V2, V3, V4, V5,
V6, six diodes D1, D2, D3, D4, D5, D6, six igbts V1, V2, V3, V4, V5, V6 difference
With six diodes D1, D2, D3, D4, D5, D6 reverse parallel connection.
The utility model has the advantages that：The wave filter that grid side is constituted using active power filtering element, it is to avoid
Passive device design is improper and initiation occurs the possibility of resonance accident, and improves its filtering rate, and by leading to after the second module
Cross the parallel connection type harmonic filter that electric capacity C4 and inductance L2 are constituted, further weak harmonic wave obtains output end and more may be used
By ground direct current.Circuit has good stability, reliability, by the harmonics restraint of multiple components, effectively saves
Electric energy loss, improves the utilization rate of the energy.
Brief description of the drawings
Accompanying drawing 1 is the utility model schematic diagram.
Specific embodiment
Below in conjunction with the concrete structure of the variable-frequency motor rectification circuit of the new SPWM controls a kind of to the utility model of accompanying drawing 1
Feature and implementation and the effect for reaching are described further.
A kind of circuit theory diagrams variable-frequency motor rectification circuit that new SPWM is controlled as shown in Figure 1, including：Three-phase electricity
Source, the first module, the second module, inductance L1, electric capacity C4, inductance L2, electric capacity C5, the three phase mains connect with first module
Connect, the three phase mains is connected with second module by the inductance L1 that connects, with the electric capacity after second module
C4, the inductance L2, the electric capacity C5 are in parallel, and the electric capacity C5 both end voltages are output voltage.
The first described modular circuit includes the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, first resistor R1, the
One resistance R1, second resistance R2, operational amplifier A 1, operational amplifier A 2, described first electric capacity C1 one end is used as the first module
Input, the first electric capacity C1 other ends connect described second electric capacity C2 one end, described first resistor R1 one end, institute respectively
State the input in the same direction of operational amplifier A 1, the first resistor R1 other ends ground connection, the second electric capacity C2 other ends connection
The output end of the operational amplifier A 2, the reverse input end of the operational amplifier A 1 connects described 3rd electric capacity C3 one end, institute
In the same direction input of the 3rd electric capacity C3 other ends respectively with described second resistance R2 one end, the operational amplifier A 2 is stated to be connected,
The reverse input end ground connection of the operational amplifier A 2, the second resistance R2 other ends connect the defeated of the operational amplifier A 2
Go out end, due to being three-phase circuit, therefore the circuit of the above there are three, connected using triangle between circuit and circuit.
The second described modular circuit includes six igbts V1, V2, V3, V4, V5, V6, six two poles
Pipe D1, D2, D3, D4, D5, D6, described six igbts V1, V2, V3, V4, V5, V6 respectively with described six two
Pole pipe D1, D2, D3, D4, D5, D6 reverse parallel connection.
The utility model has the advantages that：The wave filter that grid side is constituted using active power filtering element, it is to avoid
Passive device design is improper and initiation occurs the possibility of resonance accident, and improves its filtering rate, and by leading to after the second module
Cross the parallel connection type harmonic filter that electric capacity C4 and inductance L2 are constituted, further weak harmonic wave obtains output end and more may be used
By ground direct current.Circuit has good stability, reliability, by the harmonics restraint of multiple components, effectively saves
Electric energy loss, improves the utilization rate of the energy.
Although embodiment of the present utility model has been shown and described above, it will be appreciated that above-described embodiment is
Exemplary, it is not intended that to limitation of the present utility model, one of ordinary skill in the art is in scope of the present utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (3)
1. the variable-frequency motor rectification circuit that a kind of new SPWM is controlled, it is characterized in that:Including three phase mains, the first module, second
Module, inductance L1, electric capacity C4, inductance L2, electric capacity C5, the three phase mains are connected with first module, the three phase mains
It is connected by the inductance L1 that connects with second module, with the electric capacity C4, the inductance L2, institute after second module
State electric capacity C5 in parallel, and the electric capacity C5 both end voltages are output voltage.
2. the variable-frequency motor rectification circuit that a kind of new SPWM according to claim 1 is controlled, it is characterized in that:Described
One module include the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, first resistor R1, first resistor R1, second resistance R2,
Operational amplifier A 1, operational amplifier A 2, described first electric capacity C1 one end as the first module input, first electric capacity
The C1 other ends connect respectively described second electric capacity C2 one end, described first resistor R1 one end, the operational amplifier A 1 it is in the same direction
Input, the first resistor R1 other ends ground connection, the second electric capacity C2 other ends connect the operational amplifier A 2 and export
End, the reverse input end of the operational amplifier A 1 connects described 3rd electric capacity C3 one end, the 3rd electric capacity C3 other ends point
Input in the same direction not with described second resistance R2 one end, the operational amplifier A 2 is connected, the operational amplifier A 2 it is anti-
To input end grounding, the second resistance R2 other ends connect the output end of the operational amplifier A 2, due to being three-phase circuit,
Therefore the circuit more than has three, is connected using triangle between circuit and circuit.
3. the variable-frequency motor rectification circuit that a kind of new SPWM according to claim 1 is controlled, it is characterized in that:Described
Two modules include six igbt V1, V2, V3, V4, V5, V6, six diodes D1, D2, D3, D4, D5, D6,
Described six igbts V1, V2, V3, V4, V5, V6 respectively with six diode D1, D2, D3, D4, D5,
D6 reverse parallel connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621421989.4U CN206274639U (en) | 2016-12-23 | 2016-12-23 | A kind of variable-frequency motor rectification circuit of new SPWM controls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621421989.4U CN206274639U (en) | 2016-12-23 | 2016-12-23 | A kind of variable-frequency motor rectification circuit of new SPWM controls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206274639U true CN206274639U (en) | 2017-06-23 |
Family
ID=59063160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621421989.4U Expired - Fee Related CN206274639U (en) | 2016-12-23 | 2016-12-23 | A kind of variable-frequency motor rectification circuit of new SPWM controls |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206274639U (en) |
-
2016
- 2016-12-23 CN CN201621421989.4U patent/CN206274639U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20170623 Termination date: 20171223 |