CN202495878U - Controlling device for serially connected power switching element - Google Patents
Controlling device for serially connected power switching element Download PDFInfo
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- CN202495878U CN202495878U CN2012201384359U CN201220138435U CN202495878U CN 202495878 U CN202495878 U CN 202495878U CN 2012201384359 U CN2012201384359 U CN 2012201384359U CN 201220138435 U CN201220138435 U CN 201220138435U CN 202495878 U CN202495878 U CN 202495878U
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Abstract
The utility model discloses a controlling device for serially connected power switching elements, and the controlling device belongs to the field of power electronic device. In the controlling device, a voltage stabilizing circuit is arranged between an input end and an output end of each power switching element, the voltages between the input ends and the output ends of power switching elements are ensured to fluctuate within an allowed range, and the elements are prevented from being burnt due to abrupt changes; a voltage stabilizing controller is added to keep the voltages between the input ends and the output ends of power switching elements at constant values, thus performance parameters of the power switching elements do not have to be completely identical during the serial connection, the flexibility of establishing the serially connected power switching elements is increased, the establishment cost is reduced, and the voltages can be outputted by the power switching elements in proportion; and a signal controller is further added to subtract the circuit relay time when sending a PWM wave to the power switching elements, thus a synchronous control of the power switching elements is realized, the occurrences of unbalanced quiescent voltages in the power switching elements are avoided, thereby the power switching elements are protected from being burnt.
Description
Technical field
The utility model relates to a kind of series connection device for power switching, particularly a kind of control device of the device for power switching of connecting.
Background technology
Along with the fast development of power electronic technology, the use of high-power equipment increases gradually, can't realize the problem of higher withstand voltage in order to solve single device for power switching, and the mode of connecting through a plurality of device for power switching usually at present improves withstand voltage.Yet device for power switching is easy to generate the unbalance and superpotential problem of terminal voltage in series connection.
As shown in Figure 1; IGBT device with series connection is an example; Series IGBT is controlled by same PWM wave control signal, because the delay of series IGBT gate signal causes terminal voltage unbalance, gate signal postpones different can causing in the opening process and on the device of holding slowly, produces due to voltage spikes; Turn-offing in advance of drive signal also can cause the overvoltage of device, and can cause that quiescent voltage is unbalanced.Therefore the series connection of IGBT device possibly cause indivedual IGBT devices to burn, and also can set off a chain reaction when serious and all IGBT devices are burnt.
In order to address the above problem, require the performance parameter of series connection device for power switching identical, set up the low problem of flexibility but still exist this moment, and each device for power switching output voltage equates, proportionally output voltage.For example when input voltage is 120V, if choose the device for power switching that operating voltage is 50V then need three at least, the series connection set of power switches builds that flexibility is low to have caused organizing cost higher again indirectly.
The utility model content
The goal of the invention of the utility model is: to the problem of above-mentioned existence; A kind of control device of the device for power switching of connecting is provided; Between the input of each device for power switching and output, a voltage stabilizing circuit is set all, voltage stabilizing is provided, guaranteed that the voltage between device for power switching input and the output fluctuates in allowed band to corresponding device for power switching; Prevent sudden change, cause device to burn.
The technical scheme that the utility model adopts is such: a kind of control device of the device for power switching of connecting; The device for power switching that comprises N series connection; The input of first device for power switching is used to connect the positive pole of input voltage in the device for power switching of this N series connection, and the output of N device for power switching is used to connect the negative pole of this input voltage; It is characterized in that: also comprise N voltage stabilizing circuit, be provided with a voltage stabilizing circuit between the input of each device for power switching and the output.
Also comprise voltage-stabilizing controller, this voltage stabilizing circuit is used for detecting in real time the voltage between corresponding device for power switching input and the output and this magnitude of voltage is sent to voltage-stabilizing controller;
Said voltage-stabilizing controller is used for the voltage between device for power switching input and the output is maintained steady state value: when the magnitude of voltage between device for power switching input and the output during less than steady state value this voltage stabilizing circuit of voltage-stabilizing controller control discharge electric weight; When the magnitude of voltage between device for power switching input and the output during greater than steady state value this voltage stabilizing circuit of voltage-stabilizing controller control absorb electric weight.
Also comprise signal controller, the output group of this signal controller connects the control end of each device for power switching respectively through a drive circuit, and the test side group of signal controller connects the output of each device for power switching respectively;
Said signal controller is used for respectively sending PWM ripple and writing down the transmitting time of this PWM ripple to each device for power switching through a drive circuit; Detect the voltage of each device for power switching output and write down the generation time of this voltage; Calculate the difference of this transmitting time and generation time, obtain the circuit delay of corresponding device for power switching;
Said signal controller also is used for when device for power switching sends this PWM ripple, deducting this circuit delay.
In sum, owing to adopted technique scheme, the beneficial effect of the utility model is:
1, the utility model all is provided with a voltage stabilizing circuit between the input of each device for power switching and output; To corresponding device for power switching voltage stabilizing is provided; Guaranteed that the voltage between device for power switching input and the output fluctuates in allowed band; Prevent sudden change, cause device to burn;
2, the utility model has increased voltage-stabilizing controller, is used for the voltage between device for power switching input and the output is maintained steady state value: when the magnitude of voltage between device for power switching input and the output during less than steady state value voltage-stabilizing controller control voltage stabilizing circuit discharge electric weight; When the magnitude of voltage between device for power switching input and the output during greater than steady state value voltage-stabilizing controller control voltage stabilizing circuit absorb electric weight; Performance parameter needn't be identical when series connection for device for power switching thus; Improved the flexibility that the series connection set of power switches is built; Reduced organizing cost, and device for power switching output voltage proportionally;
3, the utility model has increased signal controller, is sent PWM ripple and writes down the transmitting time of this PWM ripple to each device for power switching by this signal controller; Detect the voltage of each device for power switching output and write down the generation time of this voltage; Calculate the difference of this time of origin and generation time, obtain the circuit delay of corresponding device for power switching, and when device for power switching sends the PWM ripple, deducting this circuit delay; Realized the synchronous of device for power switching control thus; It is unbalanced to avoid device for power switching quiescent voltage to occur, thereby has protected device for power switching, avoids burning.
Description of drawings
Fig. 1 is a traditional I GBT device series control circuit schematic diagram;
Fig. 2 is the circuit theory diagrams of the utility model;
Fig. 3 is the circuit theory diagrams of first embodiment in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 2; The control device of series connection device for power switching is by device for power switching, a N voltage stabilizing circuit and a voltage-stabilizing controller of a signal controller, a N drive circuit, a N series connection; The output anodal and N device for power switching that wherein input of first device for power switching is used to connect input voltage in the device for power switching of N series connection is used to connect the negative pole of input voltage; The output group of signal controller connects the control end of each device for power switching respectively through a drive circuit; The test side group of signal controller connects the output of each device for power switching respectively; Be provided with a voltage stabilizing circuit between the input of each device for power switching and the output, and each voltage stabilizing circuit is connected with voltage-stabilizing controller is two-way all.
This signal controller sends PWM ripple and writes down the transmitting time of this PWM ripple to each device for power switching through a drive circuit respectively; Detect the voltage of each device for power switching output and write down the generation time of this voltage, calculate the difference of this time of origin and generation time, obtain the circuit delay of corresponding device for power switching.This signal controller is deducting this circuit delay when device for power switching sends the PWM ripple.Realized the synchronous of device for power switching control thus, it is unbalanced to avoid device for power switching quiescent voltage to occur, thereby has protected device for power switching, avoids burning.
This voltage stabilizing circuit is used for to corresponding device for power switching voltage stabilizing being provided: when the voltage between device for power switching input and the output rose and surpass higher limit, voltage stabilizing circuit can absorb electric weight; When the voltage between device for power switching input and the output descended and surpass lower limit, voltage stabilizing circuit can discharge electric weight.Guaranteed that thus the voltage between device for power switching input and the output fluctuates in allowed band, prevented sudden change, caused device to burn.
This voltage stabilizing circuit also is used for detecting in real time the voltage between corresponding device for power switching input and the output and this magnitude of voltage is sent to voltage-stabilizing controller.Voltage-stabilizing controller is used for the voltage between device for power switching input and the output is maintained steady state value: when the magnitude of voltage between device for power switching input and the output during less than steady state value voltage-stabilizing controller control voltage stabilizing circuit discharge electric weight; When the magnitude of voltage between device for power switching input and the output during greater than steady state value voltage-stabilizing controller control voltage stabilizing circuit absorb electric weight.Thus device for power switching when series connection performance parameter needn't be identical, improved the flexibility that the series connection set of power switches is built, reduced organizing cost, and device for power switching output voltage proportionally.This steady state value can be set as required.
As shown in Figure 3; This device for power switching is selected the IGBT device for use in first embodiment of the utility model; The current collection of IGBT device is the input of device for power switching very, and the emission of the IGBT device very output of device for power switching and the gate pole of IGBT device is the control end of device for power switching.The collector electrode of first IGBT connects the positive pole of input voltage in the series IGBT device; The emitter of N IGBT connects the negative pole of input voltage through subsequent conditioning circuit; The output of signal controller connects the gate pole of each IGBT respectively through a drive circuit, and the test side group of signal controller connects the emitter of each IGBT respectively.Be provided with a voltage stabilizing circuit between the emitter of each IGBT and the collector electrode, and each voltage stabilizing circuit is connected with voltage-stabilizing controller is two-way all.
Certainly, device for power switching can also be triode, MOSFET pipe etc. except selecting the IGBT device for use.In addition, the series connection device can also be electric capacity, storage battery etc.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (3)
1. the control device of the device for power switching of connecting; The device for power switching that comprises N series connection; The input of first device for power switching is used to connect the positive pole of input voltage in the device for power switching of this N series connection, and the output of N device for power switching is used to connect the negative pole of this input voltage; It is characterized in that: also comprise N voltage stabilizing circuit, be provided with a voltage stabilizing circuit between the input of each device for power switching and the output.
2. the control device of series connection device for power switching according to claim 1; It is characterized in that: also comprise voltage-stabilizing controller, this voltage stabilizing circuit is used for detecting in real time the voltage between corresponding device for power switching input and the output and this magnitude of voltage is sent to voltage-stabilizing controller;
Said voltage-stabilizing controller is used for the voltage between device for power switching input and the output is maintained steady state value: when the magnitude of voltage between device for power switching input and the output during less than steady state value this voltage stabilizing circuit of voltage-stabilizing controller control discharge electric weight; When the magnitude of voltage between device for power switching input and the output during greater than steady state value this voltage stabilizing circuit of voltage-stabilizing controller control absorb electric weight.
3. the control device of series connection device for power switching according to claim 2; It is characterized in that: also comprise signal controller; The output group of this signal controller connects the control end of each device for power switching respectively through a drive circuit, the test side group of signal controller connects the output of each device for power switching respectively;
Said signal controller is used for respectively sending PWM ripple and writing down the transmitting time of this PWM ripple to each device for power switching through a drive circuit; Detect the voltage of each device for power switching output and write down the generation time of this voltage; Calculate the difference of this transmitting time and generation time, obtain the circuit delay of corresponding device for power switching;
Said signal controller also is used for when device for power switching sends this PWM ripple, deducting this circuit delay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201384359U CN202495878U (en) | 2012-04-05 | 2012-04-05 | Controlling device for serially connected power switching element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201384359U CN202495878U (en) | 2012-04-05 | 2012-04-05 | Controlling device for serially connected power switching element |
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| Publication Number | Publication Date |
|---|---|
| CN202495878U true CN202495878U (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201384359U Expired - Fee Related CN202495878U (en) | 2012-04-05 | 2012-04-05 | Controlling device for serially connected power switching element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258905A (en) * | 2018-02-12 | 2018-07-06 | 广州金升阳科技有限公司 | A kind of booster circuit and its control method |
-
2012
- 2012-04-05 CN CN2012201384359U patent/CN202495878U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258905A (en) * | 2018-02-12 | 2018-07-06 | 广州金升阳科技有限公司 | A kind of booster circuit and its control method |
| CN108258905B (en) * | 2018-02-12 | 2024-04-12 | 广州金升阳科技有限公司 | Boost circuit and control method thereof |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20121017 Termination date: 20140405 |