CN202616981U - Interlocking driving circuit and frequency converter - Google Patents
Interlocking driving circuit and frequency converter Download PDFInfo
- Publication number
- CN202616981U CN202616981U CN 201220157436 CN201220157436U CN202616981U CN 202616981 U CN202616981 U CN 202616981U CN 201220157436 CN201220157436 CN 201220157436 CN 201220157436 U CN201220157436 U CN 201220157436U CN 202616981 U CN202616981 U CN 202616981U
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Abstract
The utility model provides an interlocking driving circuit and a frequency converter. The interlocking driving circuit comprises a first driving optical coupler OP1, a second driving optical coupler OP4, wherein the first driving optical coupler OP1 and the second driving optical coupler OP4 form the interlocking driving circuit. Two positive and negative interlocking signals are formed, wherein no matter whether one of the signals is high level or low level, the level of the other signal must be opposite to that of the former one. Therefore, when an upper bridge arm and a lower bridge arm of an IGBT (insulated gate bipolar translator) are driven, the two bridge arms can not be switched on at the same time, that is, short-circuit does not occur. A condition that the two bridge arms are high or low at the same time does not occur even if the IGBT is interfered, thereby protecting the IGBT, and preventing the IGBT from being damaged because of errors in calculating or controlling.
Description
Technical field
The utility model relates to electric and electronic technical field, particularly a kind of interlocking drive circuit and frequency converter.
Background technology
The driving of the inversion unit of frequency converter at present; Most of always manufacturer all adopts seven groups of control signals to realize the situation of opening of six IGBT pipes of inversion unit, and the computed in software required precision is very strict, does not allow mistake to some extent; Otherwise the straight-through phenomenon of same road output can appear; Thereby cause the damage of IGBT pipe, even explosion phenomenon occurs, influenced the coefficient of safety of work.But do not make mistakes with control because the computed in software precision is high, the straight-through phenomenon of same road output still might occur, cause the damage of IGBT pipe.
The utility model content
The utility model provides a kind of interlocking drive circuit and frequency converter, with protection IGBT pipe, prevents owing to calculate the damage that perhaps control error causes the IGBT pipe.
To achieve these goals, the utility model provides following technical scheme:
A kind of interlocking drive circuit, it comprises: first drives optocoupler OP1 and second drives optocoupler OP4;
Said first drives the positive pole of the anode input connection pwm signal voltage of optocoupler OP1; Said first drives the positive pole of the negative electrode input of optocoupler OP1 through first resistance R, 28 connection pwm signal voltages, and the negative electrode input of the said first driving optocoupler OP1 also connects the negative pole of pwm signal voltage through second resistance R 30;
The voltage output end of the said first driving optocoupler OP1 connects an end of the 3rd resistance R 37, and the other end of said the 3rd resistance R 37 connects goes up bridge drive end UP+, bridge drive end UP-under the other end of said the 3rd resistance R 37 also connects through the 4th resistance R 44;
Said second drives the positive pole of the negative electrode input connection pwm signal voltage of optocoupler OP4; Said second drives the negative pole of the anode input of optocoupler OP4 through the 5th resistance R 33 connection pwm signal voltages, and the anode input of the said second driving optocoupler OP4 also connects the positive pole of pwm signal voltage through the 6th resistance R 29;
The voltage output end of the said second driving optocoupler OP4 connects an end of the 7th resistance R 40, and the other end of said the 7th resistance R 40 connects triode drive end UN+, and the other end of said the 7th resistance R 40 also connects common port NG through the 8th resistance R 47;
Said first drives the earth terminal of the power end of optocoupler OP1 through the said first driving optocoupler OP1 of first capacitor C, 2 connections;
Said second drives the earth terminal of the power end of optocoupler OP4 through the said second driving optocoupler OP4 of second capacitor C, 3 connections.
Preferably, the voltage output end of the said first driving optocoupler OP1 is two, and two voltage output ends of the first driving optocoupler OP1 are connected; The voltage output end of the said second driving optocoupler OP4 is two, and two voltage output ends of the second driving optocoupler OP4 are connected.
The utility model also provides a kind of frequency converter, comprises above-mentioned any described interlocking drive circuit.
Through implementing above technical scheme, have following technique effect: interlocking drive circuit and frequency converter that the utility model provides, this interlocking drive circuit is made up of the signal of two positive and negative interlockings; No matter one of them is high or low level, another one must be opposite with its level, therefore; When driving two brachium pontis up and down of IGBT pipe, the situation of two conductings simultaneously can not appear, and just can short circuit; Even when being interfered; Also can height or low situation simultaneously not occur, thereby protect the IGBT pipe, prevent owing to calculate or control the damage that error causes the IGBT pipe because of disturbing.
Description of drawings
The structural representation of the interlocking drive circuit that Fig. 1 provides for the utility model.
Embodiment
In order better to understand the technical scheme of the utility model, describe the embodiment that the utility model provides in detail below in conjunction with accompanying drawing.
The utility model embodiment provides a kind of interlocking drive circuit, and is as shown in Figure 1, and this interlocking drive circuit comprises: first drives optocoupler OP1 and second drives optocoupler OP4;
Said first drives the anodal U+ of anode input (the 2nd pin) the connection pwm signal voltage of optocoupler OP1; Said first drives the anodal U+ of the negative electrode input (the 3rd pin) of optocoupler OP1 through first resistance R, 28 connection pwm signal voltages, and the negative electrode input (the 3rd pin) of the said first driving optocoupler OP1 also connects the negative pole U-of pwm signal voltage through second resistance R 30.
Said first drives an end of voltage output end (the 6th, 7 pin) connection the 3rd resistance R 37 of optocoupler OP1; The other end of said the 3rd resistance R 37 connects goes up bridge drive end UP+, and the other end of said the 3rd resistance R 37 also connects bridge drive end UP-down through the 4th resistance R 44.
Said second drives the anodal U+ of negative electrode input (the 3rd pin) the connection pwm signal voltage of optocoupler OP4; Said second drives the negative pole U-of the anode input (the 2nd pin) of optocoupler OP4 through the 5th resistance R 33 connection pwm signal voltages, and the anode input (the 2nd pin) of the said second driving optocoupler OP4 also connects the anodal U-of pwm signal voltage through the 6th resistance R 29.
Said second drives an end of voltage output end (the 6th, 7 pin) connection the 7th resistance R 40 of optocoupler OP4; The other end of said the 7th resistance R 40 connects triode drive end UN+, and the other end of said the 7th resistance R 40 also connects common port NG through the 8th resistance R 47.
Said first drives the earth terminal (5th pin) of the power end (the 8th pin) of optocoupler OP1 through the said first driving optocoupler OP1 of first capacitor C, 2 connections.
Said second drives the earth terminal (5th pin) of the power end (the 8th pin) of optocoupler OP4 through the said second driving optocoupler OP4 of second capacitor C, 3 connections.
In the above-described embodiments; More concrete, the voltage output end of the said first driving optocoupler OP1 is two, comprises the 6th pin and the 7th pin; And two voltage output ends of the first driving optocoupler OP1 are connected, and promptly 6 pins of the first driving optocoupler OP1 are connected with the 7th pin; Said second drive optocoupler OP4 voltage output end be two, comprise the 6th pin and the 7th pin, and second drive optocoupler OP4 two voltage output ends be connected, promptly first drive optocoupler OP1 6 pins be connected with the 7th pin.
In above-mentioned each embodiment; First drives optocoupler OP1 and second drives in the drive inverse unit that optocoupler OP4 is a frequency converter driving optocoupler of half-bridge and following half-bridge on the way; U+ and U-are two pwm signals that drive upper and lower bridge arm, and these two pwm signals are opposite, have so just determined the first driving optocoupler OP1 and second to drive two optocouplers of optocoupler OP4 and can not drive upper and lower bridge arm simultaneously; Unsafe condition appears in the direct conducting short circuit of prevention upper and lower bridge arm.
As U+ when being high, U-is low, drives optocoupler OP1 action drives this moment first; The half-bridge that passes through in the last bridge drive end UP+ driving of drive inverse unit is opened; Second drives optocoupler OP4 is failure to actuate, and the following half-bridge of inversion unit closes, last half-bridge and the directly conducting of following half-bridge; On the contrary, U+ is low, and when U-was high, second drove optocoupler OP4 action, and through half-bridge conducting under bridge drive end UP-drives down, first drives optocoupler OP1 is failure to actuate, and last half-bridge ends, and last half-bridge can not lead directly to following half-bridge; Formed half-bridge interlocking up and down.
The utility model embodiment also provides a kind of frequency converter, and this frequency converter comprises above-mentioned interlocking drive circuit.
More than a kind of interlocking drive circuit and frequency converter that the utility model embodiment is provided carried out detailed introduction; For one of ordinary skill in the art; Thought according to the utility model embodiment; The part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (3)
1. an interlocking drive circuit is characterized in that, comprising: first drives optocoupler OP1 and second drives optocoupler OP4;
Said first drives the positive pole of the anode input connection pwm signal voltage of optocoupler OP1; Said first drives the positive pole of the negative electrode input of optocoupler OP1 through first resistance R, 28 connection pwm signal voltages, and the negative electrode input of the said first driving optocoupler OP1 also connects the negative pole of pwm signal voltage through second resistance R 30;
The voltage output end of the said first driving optocoupler OP1 connects an end of the 3rd resistance R 37, and the other end of said the 3rd resistance R 37 connects goes up bridge drive end UP+, bridge drive end UP-under the other end of said the 3rd resistance R 37 also connects through the 4th resistance R 44;
Said second drives the positive pole of the negative electrode input connection pwm signal voltage of optocoupler OP4; Said second drives the negative pole of the anode input of optocoupler OP4 through the 5th resistance R 33 connection pwm signal voltages, and the anode input of the said second driving optocoupler OP4 also connects the positive pole of pwm signal voltage through the 6th resistance R 29;
The voltage output end of the said second driving optocoupler OP4 connects an end of the 7th resistance R 40, and the other end of said the 7th resistance R 40 connects triode drive end UN+, and the other end of said the 7th resistance R 40 also connects common port NG through the 8th resistance R 47;
Said first drives the earth terminal of the power end of optocoupler OP1 through the said first driving optocoupler OP1 of first capacitor C, 2 connections;
Said second drives the earth terminal of the power end of optocoupler OP4 through the said second driving optocoupler OP4 of second capacitor C, 3 connections.
2. interlocking drive circuit according to claim 1 is characterized in that, said first drive optocoupler OP1 voltage output end be two, and first drive optocoupler OP1 two voltage output ends be connected; The voltage output end of the said second driving optocoupler OP4 is two, and two voltage output ends of the second driving optocoupler OP4 are connected.
3. a frequency converter is characterized in that, comprises claim 1 or 2 described interlocking drive circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220157436 CN202616981U (en) | 2012-04-13 | 2012-04-13 | Interlocking driving circuit and frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220157436 CN202616981U (en) | 2012-04-13 | 2012-04-13 | Interlocking driving circuit and frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202616981U true CN202616981U (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220157436 Expired - Fee Related CN202616981U (en) | 2012-04-13 | 2012-04-13 | Interlocking driving circuit and frequency converter |
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| Country | Link |
|---|---|
| CN (1) | CN202616981U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720808A (en) * | 2016-03-16 | 2016-06-29 | 珠海格力电器股份有限公司 | Inverter startup short-circuit protection method and device |
| CN105743337B (en) * | 2016-04-26 | 2018-04-17 | 湖南利能科技股份有限公司 | IGBT drive signal interlock circuits |
| CN109814446A (en) * | 2019-01-14 | 2019-05-28 | 武汉盛硕电子有限公司 | A kind of control device, a kind of mixer truck |
-
2012
- 2012-04-13 CN CN 201220157436 patent/CN202616981U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720808A (en) * | 2016-03-16 | 2016-06-29 | 珠海格力电器股份有限公司 | Inverter startup short-circuit protection method and device |
| CN105743337B (en) * | 2016-04-26 | 2018-04-17 | 湖南利能科技股份有限公司 | IGBT drive signal interlock circuits |
| CN109814446A (en) * | 2019-01-14 | 2019-05-28 | 武汉盛硕电子有限公司 | A kind of control device, a kind of mixer truck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20140413 |