CN104270040A - Frequency converter - Google Patents
Frequency converter Download PDFInfo
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- CN104270040A CN104270040A CN201410534201.XA CN201410534201A CN104270040A CN 104270040 A CN104270040 A CN 104270040A CN 201410534201 A CN201410534201 A CN 201410534201A CN 104270040 A CN104270040 A CN 104270040A
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Abstract
The invention discloses a frequency converter which comprises a power circuit, a transformer circuit, a main control panel circuit, an isolating circuit, a detection circuit and a variable frequency drive circuit. The output end of the power circuit is connected with the transformer circuit, and the output end of the transformer circuit is connected with the main control panel circuit. The output end of the main control panel circuit is connected with the isolating circuit, and the output end of the isolating circuit is connected with the variable frequency drive circuit. The output end of the variable frequency drive circuit is connected with the detection circuit, and the output end of the detection circuit is connected with the main control panel circuit. The frequency converter achieves quick converting from low frequency to medium frequency when multiple motors are used, and improves the using efficiency of the frequency converter.
Description
Technical field
The present invention relates to converter technique field, be specifically related to a kind of frequency converter.
Background technology
Along with the development of society, the needs of people to electric power are more and more higher, and be not only needs electric power, also requires some equipment is out of doors installed to have the machine of generating capacity in house.The internal cause overvoltage of power electronic device or overcurrent, the switching loss of device can be made, generally all rectifier cell is added with in the switching mechanism electric control circuit of the device of existing transformer, switching mechanism control circuit is generally DC power supply, for meeting the requirement that switching mechanism control circuit still can use in some are without rectifying device environment, just in switching mechanism control circuit, add rectifier cell and alternating current is become direct current, existing transducer drive speed is lower, the use of many motors can not be met, the scope of application of the frequency converter of restriction.
Summary of the invention
For solving the deficiency that above-mentioned technology exists, the present invention proposes a kind of frequency converter, realizes the rapid translating from low frequency to intermediate frequency when many motors use, improves the service efficiency of frequency converter.
The present invention adopts following technical scheme to realize:
A kind of frequency converter, comprise: power circuit, transformer circuit, master control borad circuit, buffer circuit, testing circuit and variable frequency drive, the output of described power circuit connects described transformer circuit, the output of described transformer circuit connects described master control borad circuit, the output of described master control borad circuit connects described buffer circuit, the output of described buffer circuit connects variable frequency drive, the output connection detection circuit of described variable frequency drive, the output of described testing circuit connects described master control borad circuit.
Further, described variable frequency drive adopts PS21564 chip, and described PS21564 chip is connected by voltage-stabiliser tube U2 with transformer circuit, and the output of described variable frequency drive connects motor.
Further, described buffer circuit is made up of optical coupling isolator PC942, resistance R15, resistance R17-R20, electric capacity C28, voltage stabilizing didoe ZD1,2 pin of described optical coupling isolator PC942 are connected with described master control borad circuit, the 1 pin contact resistance 15 of described optical coupling isolator PC942 is also connected by voltage stabilizing didoe ZD1 with 8 pin, and 1 pin of described optical coupling isolator PC942 is connected with relay by resistance R15.
Further, described testing circuit adopts comparator U1 and comparator U3, described comparator U1 and comparator U3 adopts 17393,8 pin of described comparator U1 are connected with relay coil, output 1 pin of described comparator U1 is connected with main board control circuit with 7 pin, the input connection transformer of described comparator U1, the input of described comparator U3 connects power circuit.
The present invention has following beneficial effect: increase multifunction terminal CF3, is applied to 8 sections and uses with crawl simultaneously.Described relay adopts and often opens for a pair and a pair normally-closed contact, for controlling two groups of different alarm signals; Frequency conversion drive speed from before 400Hz, bringing up to present frequency conversion drive output frequency is 1200Hz, turns to intermediate frequency to drive, can be suitable for more motor from low frequency driving.
Accompanying drawing explanation
Fig. 1 is a kind of converter circuit structure block diagram that the present invention proposes;
Fig. 2 is circuit construction of electric power figure of the present invention;
Fig. 3 is transformer circuit structure chart of the present invention;
Fig. 4 is switching tube circuit connection diagram of the present invention;
Fig. 5 is buffer circuit structure chart of the present invention;
Fig. 6 is testing circuit structure chart of the present invention;
Fig. 7 is multifunctional connecting terminals circuit structure diagram of the present invention;
Fig. 8 is variable frequency drive structure chart of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention is specifically introduced.
See Fig. 1 to Fig. 8, wherein Fig. 1 is a kind of converter circuit structure block diagram that the present invention proposes; Fig. 2 is circuit construction of electric power figure of the present invention; Fig. 3 is transformer circuit structure chart of the present invention; Fig. 4 is switching tube circuit connection diagram of the present invention; Fig. 5 is buffer circuit structure chart of the present invention; Fig. 6 is testing circuit structure chart of the present invention; Fig. 7 is multifunctional connecting terminals circuit structure diagram of the present invention; Fig. 8 is variable frequency drive structure chart of the present invention.
As shown in Figures 1 to 8, a kind of frequency converter, comprise: power circuit, transformer circuit, master control borad circuit, buffer circuit, testing circuit and variable frequency drive, the output of described power circuit connects described transformer circuit, the output of described transformer circuit connects described master control borad circuit, the output of described master control borad circuit connects described buffer circuit, the output of described buffer circuit connects variable frequency drive, the output connection detection circuit of described variable frequency drive, the output of described testing circuit connects described master control borad circuit.
Described variable frequency drive adopts PS21564 chip, and described PS21564 chip is connected by voltage-stabiliser tube U2 with transformer circuit, and the output of described variable frequency drive connects motor.In the embodiment of the present invention, described voltage-stabiliser tube adopts 78L12 to carry out voltage stabilizing to the voltage of input driving circuit.
Described variable frequency drive connects multifunctional connecting terminals, and described multifunctional connecting terminals is connected by optical coupling isolator.In the embodiment of the present invention, by increasing multifunctional connecting terminals CF3, realizing multiple motor can use simultaneously.
Described power circuit is by control chip UC3842, triode Q3 and resistance capacitance composition, the base stage of described triode Q3 is connected with 3 pin of control chip UC3842, the collector electrode of described triode Q3 is by diode D12, resistance R39 and electric capacity C28 is connected with 4 pin of control chip UC3842, the emitter of described triode is connected with 8 pin of control chip UC3842, 6 pin of described control chip UC3842 are by diode D21, resistance R23, R24 is connected with the G pole of switching tube, the base stage of described triode Q3 is connected with the E pole of switching tube by resistance R33, 4 pin of described control chip UC3842 are by resistance R22, R85, R64, R31 is connected with transformer circuit, described electric capacity C25 resistance R35 forms overload protecting circuit, 4 pin of described control chip are by resistance R39, R27-R30 holds with the positive pole P of drive circuit and is connected.Power circuit is connected with transformer circuit by the D end of switching tube, be connected with power supply output cathode P by diode D11, electric capacity C30, resistance R43 and resistance R42, described power output end is connected with the positive pole of radiator fan with resistance R40 by resistance R41, electric capacity C2.
Described buffer circuit is made up of optical coupling isolator PC942, resistance R15, resistance R17-R20, electric capacity C28, voltage stabilizing didoe ZD1,2 pin of described optical coupling isolator PC942 are connected with described master control borad circuit, the 1 pin contact resistance 15 of described optical coupling isolator PC942 is also connected by voltage stabilizing didoe ZD1 with 8 pin, and 1 pin of described optical coupling isolator PC942 is connected with relay by resistance R15.
Output 7 pin of described optical coupling isolator is connected with testing circuit, and 7 pin of described PC942 are connected with brake pipe G pin by resistance R20, and described brake pipe is FS14SM.In the embodiment of the present invention, brake pipe adopts field-effect circuits, and wherein AR1-AR3 is brake resistance, is realized the effect of switch and energy consumption release by braking circuit.
Described testing circuit adopts comparator U1 and comparator U3, described comparator U1 and comparator U3 adopts 17393,8 pin of described comparator U1 are connected with relay coil, output 1 pin of described comparator U1 is connected with main board control circuit with 7 pin, the input connection transformer of described comparator U1, the input of described comparator U3 connects power circuit.2 pin of comparator U3 are connected thermistor interface J2 with 3 pin, and described thermistor interface J2 is connected with external thermistor.
Increase multifunctional connecting terminals CF3, wherein multifunctional connecting terminals CF1, CF2, CF3 connects optical coupling isolator P11, P12, P8 respectively, and multifunctional connecting terminals CF3 is applied to 8 sections and uses with motor simultaneously.Relay adopts and often opens for a pair and a pair normally-closed contact, for controlling two groups of different alarm signals; Frequency conversion drive speed from before 400Hz, bringing up to present frequency conversion drive output frequency is 1200Hz, turns to intermediate frequency to drive, can be suitable for more motor from low frequency driving.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a frequency converter, it is characterized in that, comprise: power circuit, transformer circuit, master control borad circuit, buffer circuit, testing circuit and variable frequency drive, the output of described power circuit connects described transformer circuit, the output of described transformer circuit connects described master control borad circuit, the output of described master control borad circuit connects described buffer circuit, the output of described buffer circuit connects variable frequency drive, the output connection detection circuit of described variable frequency drive, the output of described testing circuit connects described master control borad circuit, described variable frequency drive connects multifunctional connecting terminals, described multifunctional connecting terminals is connected by optical coupling isolator.
2. a kind of frequency converter according to claim 1, is characterized in that, described variable frequency drive adopts PS21564 chip, and described PS21564 chip is connected by voltage-stabiliser tube U2 with transformer circuit, and the output of described variable frequency drive connects motor.
3. a kind of frequency converter according to claim 1, it is characterized in that, described buffer circuit is made up of optical coupling isolator PC942, resistance R15, resistance R17-R20, electric capacity C28, voltage stabilizing didoe ZD1,2 pin of described optical coupling isolator PC942 are connected with described master control borad circuit, the 1 pin contact resistance 15 of described optical coupling isolator PC942 is also connected by voltage stabilizing didoe ZD1 with 8 pin, and 1 pin of described optical coupling isolator PC942 is connected with relay by resistance R15.
4. a kind of frequency converter according to claim 1, it is characterized in that, described testing circuit adopts comparator U1 and comparator U3, described comparator U1 and comparator U3 adopts 17393,8 pin of described comparator U1 are connected with relay coil, output 1 pin of described comparator U1 is connected with main board control circuit with 7 pin, the input connection transformer of described comparator U1, and the input of described comparator U3 connects power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410534201.XA CN104270040A (en) | 2014-10-11 | 2014-10-11 | Frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410534201.XA CN104270040A (en) | 2014-10-11 | 2014-10-11 | Frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104270040A true CN104270040A (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410534201.XA Pending CN104270040A (en) | 2014-10-11 | 2014-10-11 | Frequency converter |
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| Country | Link |
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| CN (1) | CN104270040A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280767A (en) * | 2013-04-18 | 2013-09-04 | 深圳市海浦蒙特科技有限公司 | Brake resistor protection circuit and brake resistor protection method for inverters |
| CN203233358U (en) * | 2012-11-26 | 2013-10-09 | 江苏力普电子科技有限公司 | Low voltage frequency converter capable of multistage speed operation |
| CN103595332A (en) * | 2013-11-26 | 2014-02-19 | 沈阳工业大学 | Rotary filter screen control method based on frequency conversion technology |
| CN204068781U (en) * | 2014-10-11 | 2014-12-31 | 刘思佳 | A kind of frequency converter |
-
2014
- 2014-10-11 CN CN201410534201.XA patent/CN104270040A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203233358U (en) * | 2012-11-26 | 2013-10-09 | 江苏力普电子科技有限公司 | Low voltage frequency converter capable of multistage speed operation |
| CN103280767A (en) * | 2013-04-18 | 2013-09-04 | 深圳市海浦蒙特科技有限公司 | Brake resistor protection circuit and brake resistor protection method for inverters |
| CN103595332A (en) * | 2013-11-26 | 2014-02-19 | 沈阳工业大学 | Rotary filter screen control method based on frequency conversion technology |
| CN204068781U (en) * | 2014-10-11 | 2014-12-31 | 刘思佳 | A kind of frequency converter |
Non-Patent Citations (1)
| Title |
|---|
| 邓云飞: ""基于磁场定向控制的交流变频调速实验平台研究"", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
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Application publication date: 20150107 |
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| WD01 | Invention patent application deemed withdrawn after publication |