CN103207339A - Method and device for determining over-current of inverter - Google Patents
Method and device for determining over-current of inverter Download PDFInfo
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Abstract
The invention discloses a method for determining the over-current of an inverter. The method comprises the steps that a current detection circuit detects the current of the inverter and sends a current detection result to a microprocessor; the microprocessor compares a detected current peak with a preset current threshold, stops normal outputting of sinusoidal pulse width modulation (SPWM) signals if the current peak is larger than or equal to the current threshold and outputs the SPWM signals equivalent to low-amplitude sinusoidal wave signals to the inverter; a voltage detection circuit detects the output voltage of the inverter and sends a voltage detection result to the microprocessor; and the microprocessor compares a detected voltage effective value with a preset voltage threshold and determines that the inverter is short-circuited if the voltage effective value is smaller than the voltage threshold, and the over-current occurs to the inverter due to impact loads. The invention further discloses a device for implementing the method. By means of the method and the device, whether the over-current of the inverter is caused by impact loads or short-circuit can be distinguished accurately.
Description
Technical field
The present invention relates to a kind of determination methods for the inverter excess current and device thereof.
Background technology
Short-circuit protection is vital problem in the inverter exploitation, is related to the security of operation of entire device.The difficult point of short-circuit protection technology is will to connect easily big electric current that impact load (as prominent power supply adaptor or the bulb etc. of connecing) causes and real short-circuit current gets mixed up, to such an extent as to do the judgement that makes mistake.This erroneous judgement probably can cause two kinds of consequences: one, real short-circuit conditions are caused device moment damage by omission; Its two, impact load current mistake is judged as short-circuit current, this moment, device will be turn-offed by mistake.In addition, the existing inverter short-circuit protection circuit mainly relies on hardware and realizes, causes implementation cost higher.
Summary of the invention
Technical matters to be solved by this invention is to be provided for determination methods and the device thereof of inverter excess current, and it can judge exactly that distinguishing the inverter excess current is to be caused or caused by short circuit by the impact load, and implementation cost is cheap.
According to a kind of inverter over-current judging method of the present invention, may further comprise the steps:
Current detection circuit detects the electric current of inverter, and the current detecting result is sent to microprocessor;
Microprocessor compares the detected current peak of current detection circuit and predefined current threshold, if this current peak is more than or equal to this current threshold, then stop the output of normal SPWM signal, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of described inverter then, and the amplitude of described low amplitude value sine wave signal should guarantee that inverter can not burnt;
Voltage detecting circuit detects the output voltage of inverter, and the voltage detecting result is sent to microprocessor;
Microprocessor compares the detected voltage effective value of voltage detecting circuit and predefined voltage threshold, if this voltage effective value is less than voltage threshold, judge that then inverter is short-circuited, if this voltage effective value more than or equal to voltage threshold, then judges it is to cause the inverter excess current by the impact load.
According to a kind of inverter over-current judging device of the present invention, comprise current detection circuit, voltage detecting circuit and microprocessor; Wherein:
Current detection circuit is for detection of the electric current of inverter, and the current detecting result is sent to microprocessor;
Voltage detecting circuit is for detection of the output voltage of inverter, and the voltage detecting result is sent to microprocessor;
Microprocessor is used for the detected current peak of current detection circuit and predefined current threshold are compared, if this current detection value is more than or equal to this current threshold, then stop normal SPWM signal output, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of described inverter then, and the amplitude of described low amplitude value sine wave signal should guarantee that inverter can not burnt; And, behind the SPWM signal of exporting described and the equivalence of low amplitude value sine wave signal, the detected voltage effective value of voltage detecting circuit and predefined voltage threshold are compared, if this voltage effective value is less than voltage threshold, judge that then inverter is short-circuited, if this voltage effective value more than or equal to voltage threshold, then judges it is to cause the inverter excess current by the impact load.
According to another inverter over-current judging method of the present invention, may further comprise the steps:
Current detection circuit detects the electric current of inverter, and the current detecting result is sent to microprocessor;
Microprocessor compares the detected current peak of current detection circuit and predefined first current threshold, if this current peak is more than or equal to this first current threshold, then stop the output of normal SPWM signal, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of described inverter then, and the amplitude of described low amplitude value sine wave signal should guarantee that inverter can not burnt;
Microprocessor compares the detected current effective value of current detection circuit and predefined second current threshold, if this current effective value is less than second current threshold, judge that then inverter is short-circuited, if this current effective value more than or equal to second current threshold, then judges it is to cause the inverter excess current by the impact load.
According to another inverter over-current judging device of the present invention, comprise current detection circuit and microprocessor; Wherein:
Current detection circuit is for detection of the electric current of inverter, and the current detecting result is sent to microprocessor;
Microprocessor is used for the detected current peak of current detection circuit and predefined first current threshold are compared, if this current peak is more than or equal to this first current threshold, then stop normal SPWM signal output, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of described inverter then, and the amplitude of described low amplitude value sine wave signal should guarantee that inverter can not burnt; And, behind the SPWM signal of exporting described and the equivalence of low amplitude value sine wave signal, the detected current effective value of current detection circuit and predefined second current threshold are compared, if this current effective value is less than second current threshold, judge that then inverter is short-circuited, if this current effective value more than or equal to second current threshold, then judges it is to cause the inverter excess current by the impact load.
After adopting technique scheme, can judge exactly that distinguishing the inverter excess current is to be caused or caused by short circuit by the impact load.In addition, judgment processing process of the present invention mainly relies on microprocessor and realizes that the hardware quantity that adopts compared with prior art significantly reduces, thereby implementation cost is lower.
Description of drawings
Fig. 1 is the schematic flow sheet according to the inverter over-current judging method of first embodiment of the invention.
Fig. 2 is the theory diagram according to the inverter over-current judging device of first embodiment of the invention.
Fig. 3 is the theory diagram according to the microprocessor of invention first embodiment.
Fig. 4 be microprocessor output according to an embodiment of the invention the SPWM waveform and with the sine wave signal of this SPWM waveform equivalence.
Fig. 5 is the schematic flow sheet according to the inverter over-current judging method of second embodiment of the invention.
Fig. 6 is the theory diagram according to the inverter over-current judging device of second embodiment of the invention.
Fig. 7 is the theory diagram according to the microprocessor of invention second embodiment.
Embodiment
Below in conjunction with accompanying drawing the present invention is made and to further specify.
With reference to figure 1.Inverter over-current judging method according to first embodiment of the invention may further comprise the steps:
Step S11, current detection circuit detects the electric current of inverter, and the current detecting result is sent to microprocessor; Can detect the bus current of inverter, also can be output current;
Step S13, microprocessor compares the detected current peak of current detection circuit and predefined current threshold, if this current peak is more than or equal to this current threshold, then stop the output of normal SPWM signal, output and the SPWM signal of low amplitude value sine wave signal equivalence are given the switching tube of described inverter then, and institute's low amplitude value sine wave signal refers to that the amplitude of this sine wave signal should guarantee that inverter can not burnt;
Step S13, voltage detecting circuit detects the output voltage of inverter, and the voltage detecting result is sent to microprocessor;
Step S14, microprocessor compares the detected voltage effective value of voltage detecting circuit and predefined voltage threshold, if this voltage effective value is less than voltage threshold, judge that then inverter is short-circuited, if this voltage effective value more than or equal to voltage threshold, then judges it is to cause the inverter excess current by the impact load.Because the short-circuit resistance infinitesimal, then detected inverter output voltage effective value should be 0 in theory, under the actual conditions, as long as set a very little voltage threshold, can reach the purpose of short circuit identification.Impact load (for example connecting bulb, adapter etc.) connects in a flash in inverter output, and internal resistance approaches and 0, but the voltage of output terminal can no longer be 0 very soon, and the output end voltage effective value that records can be more than or equal to the voltage threshold of setting.
In a preferred implementation, above-mentioned inverter over-current judging method further may further comprise the steps, if the short circuit of microprocessor judges inverter is then sent signal to the external world, to cut off the power supply of inverter, plays the effect of short-circuit protection; If microprocessor judges is to cause the inverter excess current by the impact load, then behind the SPWM signal of output and the equivalence of low amplitude value sine wave signal, output soft start SPWM signal is given the switching tube of inverter earlier, and then exports the switching tube that normal SPWM signal is given inverter.Above-mentioned all shown in Figure 4 with the SPWM signal equivalence of low amplitude value sine wave signal and soft start SPWM signal, with the amplitude of the sine wave signal of this soft start SPWM signal equivalence less than with the sine wave signal of normal SPWM signal equivalence, greater than the amplitude of low amplitude value sine wave signal.Microprocessor can be realized the soft start of load, thereby prevent the infringement to load at second period output soft start SPWM signal.The concept of the voltage effective value among the above-mentioned steps S14 is not limited to the voltage effective value of a complete cycle shown in Fig. 4, also can be other interior voltage effective value of a period of time, for example, and half period or the voltage effective value in 3/4ths cycles.
Fig. 2 shows the circuit block diagram for an embodiment of the device of realizing above-mentioned inverter over-current judging method.Inverter over-current judging device comprises current detection circuit 11, voltage detecting circuit 12 and microprocessor 13.Wherein: current detection circuit 11 is for detection of the electric current of inverter 100, and the current detecting result is sent to microprocessor 13.Voltage detecting circuit 12 is for detection of the output voltage of inverter 100, and the voltage detecting result is sent to microprocessor 13.Microprocessor 13 is used for current detection circuit 11 detected current peaks and predefined current threshold are compared, if this current detection value is more than or equal to this current threshold, then stop normal SPWM signal output, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of inverter 100 then, and the amplitude of low amplitude value sine wave signal should guarantee that inverter can not burnt; And, behind the SPWM signal of output and the equivalence of low amplitude value sine wave signal, voltage detecting circuit 12 detected voltage effective values and predefined voltage threshold are compared, if this voltage effective value is less than voltage threshold, judge that then inverter 100 is short-circuited, if this voltage effective value more than or equal to voltage threshold, then judges it is to cause inverter 100 excess current by the impact load.Microprocessor 13 for example can adopt MCU.Inverter 100 among the figure is to be example with the full-bridge inverter, and inverter over-current judging method of the present invention and device thereof also are applicable to half-bridge inverter.
As shown in Figure 3, microprocessor 13 comprises current threshold setup unit 131, voltage threshold setup unit 132, SPWM signal output unit 133, first judging unit 134 and second judging unit 135.
Wherein: current threshold setup unit 131 is used for preestablishing and the storaging current threshold value.Voltage threshold setup unit 132 is used for preestablishing and the storage voltage threshold value.SPWM signal output unit 133 is used for the switching tube that output SPWM signal is given inverter 100.First judging unit 134 is used for the current threshold of current detection circuit 11 detected current peaks and setting is compared, if this current detection value is more than or equal to this current threshold, then control the output that SPWM signal output unit 133 stops normal SPWM signal, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of inverter 100 then.Second judging unit 135 is used for behind the SPWM signal of 133 outputs of SPWM signal output unit and the equivalence of low amplitude value sine wave signal, the voltage threshold of voltage detecting circuit 12 detected voltage effective values and setting is compared, if this voltage effective value is less than voltage threshold, judge that then inverter is short-circuited, if this voltage effective value more than or equal to voltage threshold, then judges it is to cause the inverter excess current by the impact load.If second judging unit 135 is judged the inverter short circuit, then send signal to the external world, to cut off the power supply of inverter; If second judging unit 135 judges it is to cause the inverter excess current by the impact load, then behind the SPWM signal of 133 outputs of SPWM signal output unit and the equivalence of low amplitude value sine wave signal, second judging unit, 135 control SPWM signal output units 133 output soft start SPWM signal are earlier given the switching tube of inverter, and then export the switching tube that normal SPWM signal is given inverter.
When microprocessor output one detects for the switching tube of inverter 100 with the SPWM signal of low amplitude value sine wave signal equivalence, utilize voltage effective value judges except first embodiment of the invention is described, also can utilize current effective value to judge.With reference to figure 5.Inverter over-current judging method according to second embodiment of the invention may further comprise the steps:
Step S21, current detection circuit detects the electric current of inverter, and the current detecting result is sent to microprocessor; Can detect the bus current of inverter, also can be output current;
Step S22, microprocessor compares the detected current peak of current detection circuit and predefined first current threshold, if this current peak is more than or equal to this first current threshold, then stop the output of normal SPWM signal, output and the SPWM signal of low amplitude value sine wave signal equivalence are given the switching tube of described inverter, and described low amplitude value sine wave signal refers to that the amplitude of this sine wave signal should guarantee that inverter can not burnt;
Step S23, microprocessor compares the detected current effective value of current detection circuit and predefined second current threshold, if this current effective value is less than second current threshold, judge that then inverter is short-circuited, if this current effective value more than or equal to second current threshold, then judges it is to cause the inverter excess current by the impact load.
In a preferred implementation, above-mentioned inverter over-current judging method further may further comprise the steps: if the short circuit of microprocessor judges inverter is then sent signal to the external world, to cut off the power supply of inverter, play the effect of short-circuit protection; If microprocessor judges is to cause the inverter excess current by the impact load, then behind the SPWM signal of output and the equivalence of low amplitude value sine wave signal, output soft start SPWM signal is given the switching tube of described inverter earlier, and then exports the switching tube that normal SPWM signal is given inverter.In a second embodiment, the SPWM waveform of microprocessor output is identical with first embodiment, as shown in Figure 4.
Fig. 6 shows the circuit block diagram for an embodiment of the device of this inverter over-current judging method of realization.Inverter over-current judging device comprises current detection circuit 21 and microprocessor 23; Wherein: current detection circuit 21 is for detection of the electric current of inverter 100, and the current detecting result is sent to microprocessor 23.Microprocessor 23 is used for current detection circuit 21 detected current peaks and predefined first current threshold are compared, if this current peak is more than or equal to this first current threshold, then stop normal SPWM signal output, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of inverter 100 then, and the amplitude of low amplitude value sine wave signal should guarantee that inverter can not burnt; And, behind the SPWM signal of output and the equivalence of low amplitude value sine wave signal, current detection circuit 21 detected current effective values and predefined second current threshold are compared, if this current effective value is less than second current threshold, judge that then inverter 100 is short-circuited, if this current effective value more than or equal to second current threshold, then judges it is to cause inverter 100 excess current by the impact load.
As shown in Figure 7, microprocessor 23 comprises the first current threshold setup unit 231, the second current threshold setup unit 232, SPWM signal output unit 233, first judging unit 234 and second judging unit 235.
Wherein: the first current threshold setup unit 231 is used for preestablishing and storing first current threshold.The second current threshold setup unit 232 is used for preestablishing and storing second current threshold.SPWM signal output unit 233 is used for the switching tube that output SPWM signal is given inverter 100.First judging unit 234 is used for first current threshold of current detection circuit 21 detected current peaks and setting is compared, if this current peak is more than or equal to this first current threshold, then control the output that SPWM signal output unit 233 stops normal SPWM signal, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of inverter 100 then.Second judging unit 235 is used for behind the SPWM signal of 233 outputs of SPWM signal output unit and the equivalence of low amplitude value sine wave signal, second current threshold of current detection circuit 21 detected current effective values and setting is compared, if this current effective value is less than second current threshold, judge that then inverter is short-circuited, if this current effective value more than or equal to second current threshold, then judges it is to cause the inverter excess current by the impact load.If second judging unit 235 is judged the inverter short circuit, then send signal to the external world, to cut off the power supply of inverter; If second judging unit 235 is to cause the inverter excess current by the impact load if judge, then behind the SPWM signal of the output of SPWM signal output unit and the equivalence of low amplitude value sine wave signal, second judging unit, 235 control SPWM signal output units output soft start SPWM signal are earlier given the switching tube of inverter, and then export the switching tube that normal SPWM signal is given inverter.
Claims (10)
1. inverter over-current judging method is characterized in that, may further comprise the steps:
Current detection circuit detects the electric current of inverter, and the current detecting result is sent to microprocessor;
Microprocessor compares the detected current peak of current detection circuit and predefined current threshold, if this current peak is more than or equal to this current threshold, then stop the output of normal SPWM signal, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of described inverter then, and the amplitude of described low amplitude value sine wave signal should guarantee that inverter can not burnt;
Voltage detecting circuit detects the output voltage of inverter, and the voltage detecting result is sent to microprocessor;
Microprocessor compares the detected voltage effective value of voltage detecting circuit and predefined voltage threshold, if this voltage effective value is less than voltage threshold, judge that then inverter is short-circuited, if this voltage effective value more than or equal to voltage threshold, then judges it is to cause the inverter excess current by the impact load.
2. as claimed in claim 1 for inverter over-current judging method, it is characterized in that, further may further comprise the steps: if described microprocessor judges is to cause the inverter excess current by the impact load, then behind the SPWM signal of output and the equivalence of low amplitude value sine wave signal, output soft start SPWM signal is given the switching tube of inverter earlier, and then exports the switching tube that normal SPWM signal is given described inverter.
3. inverter over-current judging device is characterized in that, comprises current detection circuit, voltage detecting circuit and microprocessor; Wherein:
Current detection circuit is for detection of the electric current of inverter, and the current detecting result is sent to microprocessor;
Voltage detecting circuit is for detection of the output voltage of inverter, and the voltage detecting result is sent to microprocessor;
Microprocessor is used for the detected current peak of current detection circuit and predefined current threshold are compared, if this current detection value is more than or equal to this current threshold, then stop normal SPWM signal output, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of described inverter then, and the amplitude of described low amplitude value sine wave signal should guarantee that inverter can not burnt; And, behind the SPWM signal of exporting described and the equivalence of low amplitude value sine wave signal, the detected voltage effective value of voltage detecting circuit and predefined voltage threshold are compared, if this voltage effective value is less than voltage threshold, judge that then inverter is short-circuited, if this voltage effective value more than or equal to voltage threshold, then judges it is to cause the inverter excess current by the impact load.
4. inverter over-current judging device as claimed in claim 3 is characterized in that described microprocessor comprises:
The current threshold setup unit is used for preestablishing and storing described current threshold;
The voltage threshold setup unit is used for preestablishing and storing described voltage threshold;
The SPWM signal output unit is used for the switching tube that output SPWM signal is given described inverter;
First judging unit, be used for the detected current peak of current detection circuit and described current threshold are compared, if this current detection value is more than or equal to this current threshold, then control the output that the SPWM signal output unit stops normal SPWM signal, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of described inverter then;
Second judging unit; Be used for behind the SPWM signal of the output of SPWM signal output unit and the equivalence of low amplitude value sine wave signal, the detected voltage effective value of voltage detecting circuit and described voltage threshold are compared, if this voltage effective value is less than voltage threshold, judge that then inverter is short-circuited, if this voltage effective value more than or equal to voltage threshold, then judges it is to cause the inverter excess current by the impact load.
5. inverter over-current judging device as claimed in claim 4, it is characterized in that, if described second judging unit is to cause the inverter excess current by the impact load if judge, then behind the SPWM signal of the output of SPWM signal output unit and the equivalence of low amplitude value sine wave signal, control SPWM signal output unit output soft start SPWM signal is earlier given the switching tube of inverter, and then exports the switching tube that normal SPWM signal is given described inverter.
6. inverter over-current judging method is characterized in that, may further comprise the steps:
Current detection circuit detects the electric current of inverter, and the current detecting result is sent to microprocessor;
Microprocessor compares the detected current peak of current detection circuit and predefined first current threshold, if this current peak is more than or equal to this first current threshold, then stop the output of normal SPWM signal, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of described inverter then, and the amplitude of described low amplitude value sine wave signal should guarantee that inverter can not burnt;
Microprocessor compares the detected current effective value of current detection circuit and predefined second current threshold, if this current effective value is less than second current threshold, judge that then inverter is short-circuited, if this current effective value more than or equal to second current threshold, then judges it is to cause the inverter excess current by the impact load.
7. inverter over-current judging method as claimed in claim 6, it is characterized in that, further may further comprise the steps: if described microprocessor judges is to cause the inverter excess current by the impact load, then behind the SPWM signal of output and the equivalence of low amplitude value sine wave signal, output soft start SPWM signal is given the switching tube of described inverter earlier, and then exports the switching tube that normal SPWM signal is given described inverter.
8. inverter over-current judging device is characterized in that, comprises current detection circuit and microprocessor; Wherein:
Current detection circuit is for detection of the electric current of inverter, and the current detecting result is sent to microprocessor;
Microprocessor is used for the detected current peak of current detection circuit and predefined first current threshold are compared, if this current peak is more than or equal to this first current threshold, then stop normal SPWM signal output, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of described inverter then, and the amplitude of described low amplitude value sine wave signal should guarantee that inverter can not burnt; And, behind the SPWM signal of exporting described and the equivalence of low amplitude value sine wave signal, the detected current effective value of current detection circuit and predefined second current threshold are compared, if this current effective value is less than second current threshold, judge that then inverter is short-circuited, if this current effective value more than or equal to second current threshold, then judges it is to cause the inverter excess current by the impact load.
9. inverter over-current judging device as claimed in claim 8 is characterized in that described microprocessor comprises:
The first current threshold setup unit is used for preestablishing and storing described first current threshold;
The second current threshold setup unit is used for preestablishing and storing described second current threshold;
The SPWM signal output unit is used for the switching tube that output SPWM signal is given described inverter;
First judging unit, be used for the detected current peak of current detection circuit and described first current threshold are compared, if this current peak is more than or equal to this first current threshold, then control the output that the SPWM signal output unit stops normal SPWM signal, the SPWM signal of output and the equivalence of low amplitude value sine wave signal is given the switching tube of described inverter then;
Second judging unit; Be used for behind the SPWM signal of the output of SPWM signal output unit and the equivalence of low amplitude value sine wave signal, the detected current effective value of current detection circuit and described second current threshold are compared, if this current effective value is less than second current threshold, judge that then inverter is short-circuited, if this current effective value more than or equal to second current threshold, then judges it is to cause the inverter excess current by the impact load.
10. inverter over-current judging device as claimed in claim 8, it is characterized in that, if described second judging unit is to cause the inverter excess current by the impact load if judge, then behind the SPWM signal of the output of SPWM signal output unit and the equivalence of low amplitude value sine wave signal, control SPWM signal output unit output soft start SPWM signal is earlier given the switching tube of inverter, and then exports the switching tube that normal SPWM signal is given described inverter.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454558A (en) * | 2013-08-30 | 2013-12-18 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Method and device for detecting voltage fluctuation failures of double-pole direct-current transmission system |
| CN104283437A (en) * | 2014-09-28 | 2015-01-14 | 株洲南车时代电气股份有限公司 | Converter |
| CN104808046A (en) * | 2014-01-24 | 2015-07-29 | Ls产电株式会社 | Apparatus and method for detecting overcurrent in inverter |
| CN106054016A (en) * | 2016-08-17 | 2016-10-26 | 科博达技术有限公司 | Method for judging short circuit fault of inverter |
| CN106940397A (en) * | 2016-01-04 | 2017-07-11 | 英飞凌科技股份有限公司 | Enhancing protection, diagnosis and the control of power distribution and control unit |
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| CN112234583A (en) * | 2020-10-10 | 2021-01-15 | 广东蓝科车仆实业有限公司 | Overload protection method of inverter, computer readable storage medium and inverter |
| CN113484580A (en) * | 2021-06-09 | 2021-10-08 | 国网上海市电力公司 | Frequency converter output parameter deviation detection table |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03141719A (en) * | 1989-10-27 | 1991-06-17 | Japan Steel Works Ltd:The | Method and device for protecting switching element |
| US6885532B2 (en) * | 2001-08-13 | 2005-04-26 | Yamaha Corporation | Current detection and overcurrent protection for transistors in pulse-width modulation amplifier |
| CN101197537A (en) * | 2006-12-06 | 2008-06-11 | 罗姆股份有限公司 | Semiconductor integrated circuit driving external fet and power supply incorporating the same |
| CN101562392A (en) * | 2008-04-15 | 2009-10-21 | 绿达光电股份有限公司 | Current-level decision device for a power supply device and related power supply device |
| CN101707434A (en) * | 2008-10-14 | 2010-05-12 | 纽福克斯光电科技（上海）有限公司 | Protection circuit of contravariant current AC output |
| CN102005912A (en) * | 2010-12-13 | 2011-04-06 | 佛山市顺德区瑞德电子实业有限公司 | Double overcurrent protection circuit of sine wave inverter |
| CN102377326A (en) * | 2010-08-20 | 2012-03-14 | 深圳市澳地特电气技术有限公司 | Insulated gate bipolar transistor (IGBT)-bridge-switch-topology-based driving circuit and protection module thereof |
| CN102969918A (en) * | 2012-11-06 | 2013-03-13 | 联合汽车电子有限公司 | Three-phase bridge-type inverter system and urgency lower short-circuit protective circuit |
-
2013
- 2013-04-28 CN CN201310154791.9A patent/CN103207339B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03141719A (en) * | 1989-10-27 | 1991-06-17 | Japan Steel Works Ltd:The | Method and device for protecting switching element |
| US6885532B2 (en) * | 2001-08-13 | 2005-04-26 | Yamaha Corporation | Current detection and overcurrent protection for transistors in pulse-width modulation amplifier |
| CN101197537A (en) * | 2006-12-06 | 2008-06-11 | 罗姆股份有限公司 | Semiconductor integrated circuit driving external fet and power supply incorporating the same |
| CN101562392A (en) * | 2008-04-15 | 2009-10-21 | 绿达光电股份有限公司 | Current-level decision device for a power supply device and related power supply device |
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Address after: 201203 Shanghai City, Pudong New Area China Zuchongzhi Road (Shanghai) Free Trade Zone No. 2388 building 1-2 Co-patentee after: Zhejiang Keboda Industrial Co., Ltd. Patentee after: Koboda technology, Limited by Share Ltd Address before: 201203, 1758 Zhangjiang East Road, Zhangjiang hi tech park, Shanghai, Pudong New Area Co-patentee before: Zhejiang Keboda Industrial Co., Ltd. Patentee before: Keboda Technology Corp. |