CN203014651U - Frequency converter input circuit and frequency converter - Google Patents
Frequency converter input circuit and frequency converter Download PDFInfo
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- CN203014651U CN203014651U CN 201220609134 CN201220609134U CN203014651U CN 203014651 U CN203014651 U CN 203014651U CN 201220609134 CN201220609134 CN 201220609134 CN 201220609134 U CN201220609134 U CN 201220609134U CN 203014651 U CN203014651 U CN 203014651U
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- wire jumper
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Abstract
The utility model provides a frequency converter input circuit, which comprises a bidirectional optocoupler, a jumper short-circuiter, a first resistor, a second resistor, an input end, an output end and a jumper, wherein the jumper short-circuiter comprises an intermediate pin, a first pin connected to high level and a second pin connected to low level; two ends of the jumper are connected to the intermediate pin and the first pin of the jumper short-circuiter respectively, or two ends of the jumper are connected to the intermediate pin and the second pin respectively; the first resistor and the second resistor are connected between the input end and the intermediate pin of the jumper short-circuiter in series; a primary side of the bidirectional optocoupler is connected to two ends of the second resistor in parallel; and the output end is connected to a secondary side of the bidirectional optocoupler. The utility model further provides a frequency converter provided with the input circuit. The frequency converter input circuit and the frequency converter provided by the utility model enable low level and high level input signals to be applied to the same circuit simultaneously.
Description
Technical field
The utility model relates to frequency converter, more particularly, relates to frequency converter input circuit and the frequency converter of a kind of applicable high level simultaneously and low imput.
Background technology
Optical coupler (opticalcoupler, be called for short optocoupler) is to come the device of transmission of electric signals take light as medium, when input adds the coupling conducting of signal of telecommunication time, and the output conducting, thus realized " electricity-light-electricity " conversion.Due to advantages such as optocoupler has that volume is little, the life-span long, contactless, antijamming capability strong, insulation between output and input, one-way transmission signals, obtain application widely on digital circuit.
In the frequency converter input circuit, generally adopt unidirectional optocoupler to realize the strong and weak electricity isolation, as shown in Figure 1.This circuit is comprised of unidirectional optocoupler U1 ', resistance R 1 ', resistance R 2 ', resistance R 3 ' and capacitor C 1 ', capacitor C 2 ', capacitor C 3 '.
Low level signal of input in the terminal DI1 on the former limit of optocoupler, terminal VCC1 forms the loop through optocoupler U1, resistance R 1 to terminal DI1, the secondary conducting of optocoupler U1, terminal DI2 is low level from the high level saltus step, thereby exports a low level signal.
Yet above-mentioned frequency converter input circuit is can only single level effective, namely when terminal DI1 input high level signal, just can not make effective low level of terminal DI2 output, thereby can't be suitable for the occasion of high level input signal.
The utility model content
The technical problems to be solved in the utility model is, can only the effective problem of single level for above-mentioned frequency converter input circuit, a kind of frequency converter input circuit and frequency converter are provided.
The technical scheme that the utility model solves the problems of the technologies described above is, a kind of frequency converter input circuit is provided, comprise two-way optocoupler, wire jumper short-circuiting device, the first resistance, the second resistance, input, output and wire jumper, wherein: described wire jumper short-circuiting device comprises interim pins, is connected to the first pin of high level and is connected to low level the second pin; The two ends of described wire jumper are interim pins and first pin of tie jumper short-circuiting device respectively, and perhaps the two ends of this wire jumper are connected respectively to interim pins and the second pin; Described the first resistance and the second resistance string are connected between the interim pins of described input and wire jumper short-circuiting device; The former limit of described two-way optocoupler is attempted by the two ends of the second resistance; Described output is connected to the secondary of two-way optocoupler.
In frequency converter input circuit described in the utility model, described input is connected to the first resistance via the 4th resistance, and the second pin of described wire jumper short-circuiting device is connected to the tie point of the first resistance and the 4th resistance via the first electric capacity.
In frequency converter input circuit described in the utility model, described input circuit also comprises the second electric capacity that is attempted by the second resistance two ends.
In frequency converter input circuit described in the utility model, the first pin and this first pin that described output is connected to the secondary of two-way optocoupler are connected to high level via the 3rd resistance, the second pin ground connection of the secondary of described two-way optocoupler.
In frequency converter input circuit described in the utility model, described the 3rd resistance is via the 3rd capacity earth.
The utility model also provides a kind of frequency converter, comprise input circuit and control unit, described input circuit comprises two-way optocoupler, wire jumper short-circuiting device, the first resistance, the second resistance, input, output and wire jumper, and wherein: described wire jumper short-circuiting device comprises interim pins, is connected to the first pin of high level and is connected to low level the second pin; The two ends of described wire jumper are interim pins and first pin of tie jumper short-circuiting device respectively, and perhaps the two ends of this wire jumper are connected respectively to interim pins and the second pin; Described the first resistance and the second resistance string are connected between the interim pins of described input and wire jumper short-circuiting device; The former limit of described two-way optocoupler is attempted by the two ends of the second resistance; The output that is connected to the secondary of two-way optocoupler is connected to control unit.
In frequency converter described in the utility model, described input is connected to the first resistance via the 4th resistance, and the second pin of described wire jumper short-circuiting device is connected to the tie point of the first resistance and the 4th resistance via the first electric capacity.
In frequency converter described in the utility model, described input circuit also comprises the second electric capacity that is attempted by the second resistance two ends.
In frequency converter described in the utility model, the first pin and this first pin that described output is connected to the secondary of two-way optocoupler are connected to high level via the 3rd resistance, the second pin ground connection of the secondary of described two-way optocoupler.
In frequency converter described in the utility model, described the 3rd resistance is via the 3rd capacity earth.
Frequency converter input circuit of the present utility model and frequency converter have following technique effect: by two-way optocoupler and wire jumper short-circuiting device, make and be suitable for simultaneously low level and high level input signal in same circuit.And the utility model can be realized two-way filtering interference signals, has the characteristics such as simple, practical.
Description of drawings
Fig. 1 is the circuit diagram of existing frequency converter input circuit.
Fig. 2 is the circuit diagram of the utility model frequency converter input circuit embodiment.
Fig. 3 is the schematic diagram of wire jumper short-circuiting device.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Fig. 2,3, it is the schematic diagram of the utility model frequency converter input circuit embodiment.Frequency converter input circuit in the utility model comprises two-way optocoupler U1, wire jumper short-circuiting device, the first resistance R 1, the second resistance R 2, input DI1, output DI2 and wire jumper, wherein the wire jumper short-circuiting device comprise interim pins OP, be connected to the first pin VCC1 of high level and be connected to low level (such as with reference to ground etc.) the second pin COM.
The two ends of the above-mentioned wire jumper interim pins OP of tie jumper short-circuiting device and the first pin VCC1(respectively are low level when the input signal of input), perhaps the two ends of this wire jumper be connected respectively to interim pins OP and the second pin COM(for example when the input signal of input be high level).
The first resistance R 1 and the second resistance R 2 are serially connected with between the interim pins of input DI1 and wire jumper short-circuiting device, and the former limit of two-way optocoupler U1 is attempted by the two ends of the second resistance R 2, and output DI2 is connected to the secondary of two-way optocoupler.By the first resistance R 1 and the second resistance R 2, can realize shunting, avoid two-way optocoupler U1 primary current excessive.
In above-mentioned frequency converter input circuit, the first pin 3 and this first pin 3 that output DI2 is connected to the secondary of two-way optocoupler U1 are connected to high level VCC2 via the 3rd resistance R 3, the second pin 4 ground connection of the secondary of two-way optocoupler U1.
When input DI1 input low level signal, can pass through interim pins OP and the first pin VCC1 in wire jumper (such as jumper cap etc.) short circuit wire jumper short-circuiting device terminal, the first pin VCC1 forms the loop through optocoupler U1, the first resistance R 1 to input DI1, the secondary conducting of optocoupler U1, output DI2 is low level from the high level saltus step, exports a low level signal.When input DI1 input high level signal, can pass through wire jumper (such as jumper cap etc.) with interim pins OP and the second pin COM short circuit of wire jumper short-circuiting device, thereby input DI1 forms the loop through the first resistance R 1, optocoupler U1 to the second pin COM of wire jumper short-circuiting device, the secondary conducting of optocoupler U1, output DI2 is low level from the high level saltus step, exports a low level signal.
Therefore, above-mentioned frequency converter input circuit, no matter input DI1 input high level signal or low level signal, can make low level signal of output DI2 output by selecting the wire jumper short-circuiting device in this circuit, thereby make frequency converter of the present utility model use different application scenarios.
For improving antijamming capability, in above-mentioned frequency converter input circuit, can increase the 4th resistance R 4 between input DI1 and the first resistance R 1, and the second pin COM of wire jumper short-circuiting device is connected to the tie point of the first resistance R 1 and the 4th resistance R 4 via the first capacitor C 1.Like this, when input DI1 input low level signal (the interim pins OP of wire jumper short-circuiting device meets the first pin VCC1), the first resistance R 1 and the first capacitor C 1 form a filter circuit, filtering interference signals; When input DI1 input high level signal (the interim pins OP of wire jumper short-circuiting device meets the first pin VCC1), the 4th resistance R 4 and the first capacitor C 1 form a filter circuit, same filtering interference signals.
By above-mentioned the first capacitor C 1 and the 4th resistance R 4, can realize two-way filtering interference signals.
In above-mentioned frequency converter input circuit, input circuit also can comprise the second electric capacity that is attempted by the second resistance two ends.In the secondary side of two-way optocoupler U1, the 3rd resistance R 3 is via the 3rd capacitor C 3 ground connection.
The utility model also provides a kind of frequency converter with above-mentioned input circuit, and this frequency converter comprises input circuit and control unit.Above-mentioned input circuit comprises two-way optocoupler, wire jumper short-circuiting device, the first resistance, the second resistance, input, output and wire jumper, and wherein: the wire jumper short-circuiting device comprises interim pins, is connected to the first pin of high level and is connected to low level the second pin; The two ends of wire jumper are interim pins and first pin of tie jumper short-circuiting device respectively, and perhaps the two ends of this wire jumper are connected respectively to interim pins and the second pin; Described the first resistance and the second resistance string are connected between the interim pins of input and wire jumper short-circuiting device; The former limit of two-way optocoupler is attempted by the two ends of the second resistance; The output that is connected to the secondary of two-way optocoupler is connected to control unit.(preferably increasing the description of the syndeton of input and output)
Be filtering interfering, can increase the 4th resistance between the input of input circuit and the first resistance, and make the second pin of wire jumper short-circuiting device be connected to the tie point of the first resistance and the 4th resistance via the first electric capacity.
In above-mentioned frequency converter, input circuit also comprises the second electric capacity that is attempted by the second resistance two ends.In above-mentioned input circuit, the first pin and this first pin that output is connected to the secondary of two-way optocoupler are connected to high level via the 3rd resistance, the second pin ground connection of the secondary of two-way optocoupler.And, can make above-mentioned the 3rd resistance via the 3rd capacity earth.
The above; it is only the better embodiment of the utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement are within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (10)
1. frequency converter input circuit, it is characterized in that: comprise two-way optocoupler, wire jumper short-circuiting device, the first resistance, the second resistance, input, output and wire jumper, wherein: described wire jumper short-circuiting device comprises interim pins, is connected to the first pin of high level and is connected to low level the second pin; The two ends of described wire jumper are interim pins and first pin of tie jumper short-circuiting device respectively, and perhaps the two ends of this wire jumper are connected respectively to interim pins and the second pin; Described the first resistance and the second resistance string are connected between the interim pins of described input and wire jumper short-circuiting device; The former limit of described two-way optocoupler is attempted by the two ends of the second resistance; Described output is connected to the secondary of two-way optocoupler.
2. frequency converter input circuit according to claim 1, it is characterized in that: described input is connected to the first resistance via the 4th resistance, and the second pin of described wire jumper short-circuiting device is connected to the tie point of the first resistance and the 4th resistance via the first electric capacity.
3. frequency converter input circuit according to claim 1 is characterized in that: described input circuit also comprises the second electric capacity that is attempted by the second resistance two ends.
4. frequency converter input circuit according to claim 1, it is characterized in that: the first pin and this first pin that described output is connected to the secondary of two-way optocoupler are connected to high level via the 3rd resistance, the second pin ground connection of the secondary of described two-way optocoupler.
5. frequency converter input circuit according to claim 4, it is characterized in that: described the 3rd resistance is via the 3rd capacity earth.
6. frequency converter, comprise input circuit and control unit, it is characterized in that: described input circuit comprises two-way optocoupler, wire jumper short-circuiting device, the first resistance, the second resistance, input, output and wire jumper, and wherein: described wire jumper short-circuiting device comprises interim pins, is connected to the first pin of high level and is connected to low level the second pin; The two ends of described wire jumper are interim pins and first pin of tie jumper short-circuiting device respectively, and perhaps the two ends of this wire jumper are connected respectively to interim pins and the second pin; Described the first resistance and the second resistance string are connected between the interim pins of described input and wire jumper short-circuiting device; The former limit of described two-way optocoupler is attempted by the two ends of the second resistance; The output that is connected to the secondary of two-way optocoupler is connected to control unit.
7. frequency converter according to claim 6, it is characterized in that: described input is connected to the first resistance via the 4th resistance, and the second pin of described wire jumper short-circuiting device is connected to the tie point of the first resistance and the 4th resistance via the first electric capacity.
8. frequency converter according to claim 6 is characterized in that: described input circuit also comprises the second electric capacity that is attempted by the second resistance two ends.
9. frequency converter according to claim 6, it is characterized in that: the first pin and this first pin that described output is connected to the secondary of two-way optocoupler are connected to high level via the 3rd resistance, the second pin ground connection of the secondary of described two-way optocoupler.
10. frequency converter according to claim 9, it is characterized in that: described the 3rd resistance is via the 3rd capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220609134 CN203014651U (en) | 2012-11-16 | 2012-11-16 | Frequency converter input circuit and frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220609134 CN203014651U (en) | 2012-11-16 | 2012-11-16 | Frequency converter input circuit and frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203014651U true CN203014651U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220609134 Expired - Fee Related CN203014651U (en) | 2012-11-16 | 2012-11-16 | Frequency converter input circuit and frequency converter |
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| CN (1) | CN203014651U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614240A (en) * | 2020-06-04 | 2020-09-01 | 积成电子股份有限公司 | Full-bridge IGBT drive circuit and implementation method thereof |
-
2012
- 2012-11-16 CN CN 201220609134 patent/CN203014651U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614240A (en) * | 2020-06-04 | 2020-09-01 | 积成电子股份有限公司 | Full-bridge IGBT drive circuit and implementation method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160218 Address after: Shenzhen City, Guangdong province Baoan 518101 District 70 Liu Xian Road two Hongwei Industrial Park building E building 1-3 Patentee after: Shenzhen Inovance Technology Co., Ltd. Patentee after: Suzhou Huichuan Technology Co.,Ltd. Address before: 518101 Guangdong city of Shenzhen province Baoan District no 70 District Liu Xian two road Hongwei Dong Industrial Zone E Patentee before: Shenzhen Inovance Technology Co., Ltd. Patentee before: Suzhou Huichuan Technology Co.,Ltd. Patentee before: Suzhou Monarch Control Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20201116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |