CN203119771U - Variable-frequency drive with automatic voltage stabilization function - Google Patents
Variable-frequency drive with automatic voltage stabilization function Download PDFInfo
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- CN203119771U CN203119771U CN 201320111097 CN201320111097U CN203119771U CN 203119771 U CN203119771 U CN 203119771U CN 201320111097 CN201320111097 CN 201320111097 CN 201320111097 U CN201320111097 U CN 201320111097U CN 203119771 U CN203119771 U CN 203119771U
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Abstract
The utility model provides a variable-frequency drive with an automatic voltage stabilization function. The variable-frequency drive with the automatic voltage stabilization function comprises a rectification unit, a filtering unit, an inverse variation unit, a driving unit and a micro-processing unit. The rectification unit, the filtering unit and the inverse variation unit are connected in sequence, and the micro-processing unit, the driving unit and the inverse variation unit are connected in sequence. The variable-frequency drive further comprises a detection unit and a voltage stabilization unit. The detection unit comprises a voltage detection unit and a current detection unit. The inverse variation unit adopts a plurality of IGBT switch arrays to form an inverse variation circuit, the output ends of the IGBT switch arrays are respectively connected with the micro-processing unit, the micro-processing unit is provided with a comparison module and a driving module, the comparison module is used for comparing voltages output by the IGBT switch arrays, and the driving module is used for controlling the voltage stabilization unit to work. The variable-frequency drive with the automatic voltage stabilization function can automatically stabilize the output voltages in rated operational voltages of a motor under the condition that the output voltages are not stable.
Description
Technical field
The utility model relates to a kind of frequency converter, is specifically related to a kind of frequency converter with the automatic voltage regulation function.
Background technology
(Variable-frequency Drive is to use converter technique and microelectric technique VFD) to frequency converter, controls the electric control appliance of alternating current motor by changing machine operation supply frequency mode.Frequency converter mainly is made up of rectification (AC-DC), filtering, inversion (direct current becomes interchange), brake unit, driver element, detecting unit, microprocessing unit etc.Voltage and the frequency of cut-offfing to adjust out-put supply of inner IGBT switching tube of frequency converter; actual needs according to motor provides its needed supply voltage; and then reach purpose energy-conservation, speed governing; in addition; frequency converter also has a lot of defencive functions; as overcurrent, overvoltage, overload protection etc., along with improving constantly of industrial automatization, frequency converter has also obtained using very widely.
Existing frequency converter is under the unstable situation of input power supply, make output voltage produce fluctuation easily by cut-offfing of IGBT switching tube, if output voltage is too high, motor will cause motor temperature to increase above running under the power supply of rated voltage, insulation goes to pot, output torque instability causes damage to motor easily.
The utility model content
At above-mentioned deficiency, the purpose of this utility model provides a kind of frequency converter with the automatic voltage regulation function, and it has mainly solved the problem of present frequency converter output voltage fluctuation.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of frequency converter with the automatic voltage regulation function, it comprises rectification unit, filter unit, inversion unit, driver element and microprocessing unit, described rectification unit, filter unit is connected successively with inversion unit, described microprocessing unit, driver element is connected successively with inversion unit, described frequency converter comprises for detection of the detecting unit of input power source change and when be used for guaranteeing that the input power supply produces voltage fluctuation, the output voltage of inversion unit keeps the voltage regulation unit of stable state, described detecting unit comprises the voltage detection unit that changes for detection of input voltage and the current detecting unit that changes for detection of input current, the inverter circuit that described inversion unit adopts a plurality of IGBT switching tube arrays to constitute, the output of described IGBT switching tube array is connected with microprocessing unit respectively, and described microprocessing unit is provided with for the comparison module that compares IGBT switching tube array output voltage size with for the driver module of controlling voltage regulation unit work.
Described rectification unit comprises the rectification circuit that rectifier bridge constitutes.
Described filter unit comprises the filter circuit that a plurality of electric capacity constitute.
Described frequency converter is provided with protected location, and described protected location comprises current foldback circuit, overload protecting circuit and overvoltage crowbar, and protected location is connected with microprocessing unit with detecting unit respectively.
Described frequency converter is provided with indicating member, and described indicating member comprises working indicating and failure indicating circuit.
Described frequency converter is provided with the communication unit that connects for communication.
Described frequency converter is provided with the display unit that shows for data.
The beneficial effects of the utility model are that the automatic voltage regulation function can be under the unstable situation of out-put supply, automatically with the rated operational voltage of output voltage stabilization at motor.
Description of drawings
Fig. 1 is logic diagram of the present utility model.
Fig. 2 is the logic diagram of microprocessing unit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
Referring to Fig. 1 and Fig. 2, the utility model comprises rectification unit 1, filter unit 2, inversion unit 4, driver element 5 and microprocessing unit 3, described rectification unit 1, filter unit 2 is connected successively with inversion unit 4, described microprocessing unit 3, driver element 5 is connected successively with inversion unit 4, described frequency converter comprises for detection of the detecting unit 6 of input power source change and when be used for guaranteeing that the input power supply produces voltage fluctuation, the output voltage of inversion unit 4 keeps the voltage regulation unit 8 of stable state, described detecting unit 6 comprises the voltage detection unit that changes for detection of input voltage and the current detecting unit that changes for detection of input current, the inverter circuit that described inversion unit 4 adopts a plurality of IGBT switching tube arrays to constitute, the output of described IGBT switching tube array is connected with microprocessing unit 3 respectively, and described microprocessing unit 3 is provided with for the comparison module 31 that compares IGBT switching tube array output voltage size and is used for the driver module 32 that control voltage regulation unit 8 is worked.
Described inversion unit 4 adopts a plurality of IGBT switching tube arrays to form inverter circuit, direct current can be changed into different frequency, width, the square wave of amplitude, the inverter circuit that described inverter circuit adopts two groups of IGBT switch arrays to form, the output of every group of IGBT switch arrays is connected with the comparison module 31 of microprocessing unit 3 respectively, compare its output voltage by comparison module 31, when its out-put supply of detection is too high, reduce the output voltage of inversion unit 4 by driver module 32 control voltage regulation units 8, cross when low when detecting its out-put supply, then by driver module 32 control voltage regulation units 8 its output voltages of rising, guarantee frequency converter under the unsettled situation of input power supply, the stability of its inversion unit 4 output voltages.
The rectification circuit that described rectification unit 1 adopts rectifier bridge to constitute can be transformed to DC power supply to power frequency supply.Also available two group transistor rectification circuits constitute rectifier circuit for reversible drives, because its power direction is reversible, can carry out regeneration operating.
The filter circuit that described filter unit 2 adopts a plurality of electric capacity to constitute, in the direct voltage after rectification unit 1 rectification, the pulsating voltage that contains power supply 6 overtones bands, the pulsating current of inversion unit 4 generations also can make the direct voltage change in addition, in order to suppress voltage fluctuation, adopt electric capacity to absorb the pulsation electric current.
Described frequency converter is provided with protected location 7; described protected location 7 comprises current foldback circuit, overload protecting circuit and overvoltage crowbar; protected location 7 is connected with microprocessing unit 3 with detecting unit 6 respectively; for detection of the voltage of frequency converter, electric current etc.; when generation overload or overvoltage etc. are unusual; in order to prevent that inverter and asynchronous motor from damaging, inverter is quit work or suppress voltage, current value.
Described frequency converter is provided with indicating member 9, and described indicating member 9 comprises working indicating and failure indicating circuit, is respectively applied to indicate operating state and the fault type of frequency converter, makes things convenient for the technical staff to know the operating state of current frequency converter.
Described frequency converter is provided with the communication unit 10 that connects for communication, realizes long-range the connection by communication unit 10 and remote computer, can directly carry out the operation of transfer of data or remote monitoring.
Described frequency converter is provided with the display unit 11 that shows for data, is used for showing fault message, makes things convenient for the technical staff to check.
The circuit that the utility model adopts is circuit commonly used in this area.
Embodiment should not be considered as restriction of the present utility model, but any improvement of doing based on spirit of the present utility model, all should be within protection range of the present utility model.
Claims (7)
1. frequency converter with the automatic voltage regulation function, it comprises rectification unit (1), filter unit (2), inversion unit (4), driver element (5) and microprocessing unit (3), described rectification unit (1), filter unit (2) is connected successively with inversion unit (4), described microprocessing unit (3), driver element (5) is connected successively with inversion unit (4), it is characterized in that: described frequency converter comprises for detection of the detecting unit (6) of input power source change and when be used for guaranteeing that the input power supply produces voltage fluctuation, the output voltage of inversion unit (4) keeps the voltage regulation unit (8) of stable state, described detecting unit (6) comprises the voltage detection unit that changes for detection of input voltage and the current detecting unit that changes for detection of input current, the inverter circuit that described inversion unit (4) adopts a plurality of IGBT switching tube arrays to constitute, the output of described IGBT switching tube array is connected with microprocessing unit (3) respectively, and described microprocessing unit (3) is provided with for the comparison module (31) that compares IGBT switching tube array output voltage size and is used for the driver module (32) that control voltage regulation unit (8) is worked.
2. the frequency converter of band automatic voltage regulation function according to claim 1 is characterized in that: described rectification unit (1) comprises the rectification circuit that rectifier bridge constitutes.
3. the frequency converter of band automatic voltage regulation function according to claim 1 is characterized in that: described filter unit (2) comprises the filter circuit that a plurality of electric capacity constitute.
4. the frequency converter of band automatic voltage regulation function according to claim 1; it is characterized in that: described frequency converter is provided with protected location (7); described protected location (7) comprises current foldback circuit, overload protecting circuit and overvoltage crowbar, and protected location (7) is connected with microprocessing unit (3) with detecting unit (6) respectively.
5. the frequency converter of band automatic voltage regulation function according to claim 1, it is characterized in that: described frequency converter is provided with indicating member (9), and described indicating member (9) comprises working indicating and failure indicating circuit.
6. the frequency converter of band automatic voltage regulation function according to claim 1 is characterized in that: described frequency converter is provided with the communication unit (10) that connects for communication.
7. the frequency converter of band automatic voltage regulation function according to claim 1 is characterized in that: described frequency converter is provided with the display unit (11) that shows for data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320111097 CN203119771U (en) | 2013-03-12 | 2013-03-12 | Variable-frequency drive with automatic voltage stabilization function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320111097 CN203119771U (en) | 2013-03-12 | 2013-03-12 | Variable-frequency drive with automatic voltage stabilization function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203119771U true CN203119771U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320111097 Expired - Fee Related CN203119771U (en) | 2013-03-12 | 2013-03-12 | Variable-frequency drive with automatic voltage stabilization function |
Country Status (1)
| Country | Link |
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| CN (1) | CN203119771U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956950A (en) * | 2014-05-06 | 2014-07-30 | 福建省唐力纵横科技发展有限公司 | Fixed-frequency voltage stabilizer and control method thereof |
| CN114047093A (en) * | 2021-11-11 | 2022-02-15 | 四川泛华航空仪表电器有限公司 | Oil quantity measuring and converting circuit and working method thereof |
-
2013
- 2013-03-12 CN CN 201320111097 patent/CN203119771U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956950A (en) * | 2014-05-06 | 2014-07-30 | 福建省唐力纵横科技发展有限公司 | Fixed-frequency voltage stabilizer and control method thereof |
| CN114047093A (en) * | 2021-11-11 | 2022-02-15 | 四川泛华航空仪表电器有限公司 | Oil quantity measuring and converting circuit and working method thereof |
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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: 20130807 Termination date: 20160312 |