CN102904453A - Driving power supply for insulated gate bipolar translator (IGBT) - Google Patents
Driving power supply for insulated gate bipolar translator (IGBT) Download PDFInfo
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- CN102904453A CN102904453A CN2012104493189A CN201210449318A CN102904453A CN 102904453 A CN102904453 A CN 102904453A CN 2012104493189 A CN2012104493189 A CN 2012104493189A CN 201210449318 A CN201210449318 A CN 201210449318A CN 102904453 A CN102904453 A CN 102904453A
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Abstract
The invention provides a driving power supply for an insulated gate bipolar translator (IGBT). The driving power supply comprises an electro magnetic compatibility (EMC) circuit, a starting protection circuit, a surge absorption circuit, a main control circuit, a power circuit and a switch transformer, wherein the EMC circuit is used for filtering input alternating current; the starting protection circuit is used for setting starting voltage; and the surge absorption circuit is used for absorbing peak voltage; the main control circuit is used for comparing preset voltage with voltage sampled by the power circuit, generating a pulse width modulation (PWM) signal and controlling a switch tube in the power circuit to be turned on and turned off. The driving power supply adopts a transformer primary coil feedback mode, so that an auxiliary winding of a transformer secondary coil is not required to be coupled with a magnetic element; the circuits are simple in structure and low in cost; and an occupied area of a printed circuit board (PCB) is small.
Description
Technical field
The present invention relates to field of power supplies, in particular, relate to a kind of driving power for IGBT.
Background technology
Along with the develop rapidly of electronics and information industry, Switching Power Supply is widely used in fields such as computer, power equipment, instrument and meter, LED illumination, medicine equipment, military industry equipments.
In the prior art, the bias voltage circuit that includes power stage circuit, control circuit in the circuit structure of power supply commonly used and power to control circuit, control circuit is started working after receiving the bias voltage that meets the demands that described bias voltage circuit provides, and the switch motion of the switching tube in the power ratio control level circuit, and then guarantee the voltage of described power stage circuit stable output.As shown in Figure 1, described power stage circuit includes a magnetic element (such as transformer), bias voltage circuit is coupled to obtain needed bias voltage by the auxiliary winding of transformer secondary and described magnetic element, and then output voltage regulated, yet auxiliary winding certainly will cause whole circuit structure area complicated, that take PCB large and consume is high.
Summary of the invention
In view of this, the invention provides a kind of driving power for IGBT, complicated to overcome the circuit structure that the IGBT driving power needs the auxiliary winding of transformer secondary to bring in the prior art, the problem that area occupied is large.
For achieving the above object, the invention provides following technical scheme:
A kind of driving power for IGBT comprises: EMC circuit, starting protection circuit, pop wave absorbing circuit, governor circuit, power circuit, switch transformer,
Described EMC circuit is used for the input AC electricity is carried out filtering;
The input of described starting protection circuit links to each other with the first output of described EMC circuit, is used for arranging starting resistor;
The first end of described pop wave absorbing circuit links to each other with the first output of described EMC circuit and the second end of described switch transformer, is used for absorbing peak voltage;
The first end of described governor circuit links to each other with the first output of described starting protection circuit; the second end links to each other with the second output of described starting protection circuit; the 3rd end respectively with the second input of described EMC circuit; the 3rd output of described starting protection circuit and the first end of described power circuit link to each other; the 4th end links to each other with the second end of described power circuit; five terminal links to each other with the 3rd end of described power circuit; the 6th end respectively with the 4th end of described power circuit; the second end of described pop wave absorbing circuit and the first end of described switch transformer link to each other; be used for comparing the size of predeterminated voltage and described power circuit sampled voltage, and produce conducting and shutoff that pwm signal is controlled the switching tube in the described power circuit.
Preferably, described EMC circuit comprises: the first electric capacity and the second electric capacity,
Described the first electric capacity and described the second Capacitance parallel connection, its common port are respectively as the first output and second output of described EMC circuit.
Preferably, described starting protection circuit comprises: the first resistance, the second resistance and the 5th electric capacity,
The first end of described the first resistance links to each other with the first output of described EMC circuit; the second end of described the first resistance links to each other with the first end of described the second resistance; the second end of described the second resistance links to each other with the second output of described EMC circuit; the first end of described the second resistance is as the first output of described starting protection circuit, and the first end of described the 5th electric capacity and the second end are successively as the second output and the 3rd output of described protection start-up circuit.
Preferably, described pop wave absorbing circuit comprises: the 3rd resistance, the 3rd electric capacity and the first diode,
The first end of described the 3rd resistance links to each other with the first end of described the 3rd electric capacity, and the first end as described pop wave absorbing circuit, the second end of described the 3rd resistance links to each other with the second end of described the 3rd electric capacity and the negative electrode of described the first diode respectively, and the anode of described the first diode is as the second end of described pop wave absorbing circuit.
Preferably, described governor circuit comprises: main control chip, the 4th resistance and the 5th resistance,
The EN of described main control chip end, S end, GND end, ISEN end, G end, VIN end are successively as first end, the second end, the 3rd end, the 4th end, the 7th end of described governor circuit; the VREF end of described main control chip links to each other with the 3rd input of described starting protection circuit by described the 4th resistance; the FB end of described governor circuit links to each other with the first end of described the 5th resistance, and the second end of described the 5th resistance is as the 6th end of described governor circuit.
Preferably, described power circuit comprises: the first switching tube and the 6th resistance,
The first end of described the 6th resistance is as the first end of described power circuit, the second end of described the 6th resistance links to each other with the source electrode of described the first switching tube, and the second end as described power circuit, the grid of described the first switching tube is as the 3rd end of described power circuit, and the drain electrode of described the first switching tube is as the 4th end of described power circuit.
Preferably, also comprise at least one output circuit, every output circuit comprises: diode D201, capacitor C 201, capacitor C 202, capacitor C 203, voltage stabilizing didoe DZ21, resistance R 21,
The anode of described diode D201 links to each other with the secondary Same Name of Ends of transformer, the negative electrode of described diode D201 links to each other with the first end of described capacitor C 201, the first end of described capacitor C 202 and the negative electrode of described voltage stabilizing didoe DZ21 respectively, and as the output plus terminal of described output circuit;
The secondary different name end of described transformer links to each other with the second end of described capacitor C 201, the first end of described capacitor C 203 and the first end of described resistance R 21 respectively, and as the output negative terminal of described output circuit;
The second end of described capacitor C 203 links to each other with the second end of described resistance R 21 and the anode of described voltage stabilizing didoe ZD21 respectively, and holds as the output ground of described output circuit.
Via above-mentioned technical scheme as can be known; compared with prior art; the invention provides a kind of driving power for IGBT; comprise: the EMC circuit; the starting protection circuit; pop wave absorbing circuit; governor circuit; power circuit; switch transformer; wherein; the EMC circuit is used for the input AC electricity is carried out filtering; the starting protection circuit is used for arranging starting resistor; pop wave absorbing circuit is used for absorbing peak voltage; governor circuit is used for comparing the size of predeterminated voltage and described power circuit sampled voltage, and produces conducting and shutoff that pwm signal is controlled the switching tube in the described power circuit.Driving power provided by the invention adopts the mode of transformer primary side feedback, does not need to be coupled by the auxiliary winding of transformer secondary and described magnetic element, and circuit structure is simple, and cost is low, and it is little to take the PCB area.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiments of the invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to the accompanying drawing that provides other accompanying drawing.
Fig. 1 is the circuit structure diagram of drive circuit in the prior art;
The circuit structure diagram of a kind of driving power for IGBT that Fig. 2 provides for the embodiment of the invention;
The structural representation of output circuit in the driving power that Fig. 3 provides for the embodiment of the invention;
The specific implementation figure of a kind of driving power for IGBT that Fig. 4 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
See also accompanying drawing 1, circuit theory diagrams for Switching Power Supply in the prior art, take power stage circuit as single-stage inverse excitation type converter circuit as example, described switching power circuit comprises: rectifier bridge 101, filter circuit 102, transformer 103, bias voltage circuit 104, control circuit 105 and the first switching tube Q1.Its operation principle is: after the processing of external AC AC through rectifier bridge 101 and filter circuit 102, be input to the former limit Same Name of Ends of transformer 103, the former limit different name end of transformer 103 is connected to the ground by the first switching tube Q1.Wherein, bias voltage circuit 104 is powered to guarantee this control circuit 105 outputs one control signal for control circuit 105 and is controlled the state of the turn-on and turn-off of the first switching tube Q1, and then guarantees the voltage supply load of the secondary stable output of transformer 103.Wherein, bias voltage circuit 104 in the Switching Power Supply is to assist winding that the former limit winding of transformer 103 is coupled to obtain electric energy by transformer secondary wherein, described power storage is in the electric capacity of described bias voltage circuit 104, the voltage at described electric capacity two ends is as bias voltage supply control circuit 105, but the volume of its auxiliary winding is large and consume is high.
For above-mentioned technical problem, the invention provides a kind of driving power for IGBT, comprise: EMC circuit 10, starting protection circuit 20, pop wave absorbing circuit 30, governor circuit 40, power circuit 50, switch transformer 60, wherein, described EMC circuit is used for the input AC electricity is carried out filtering; The input of described starting protection circuit links to each other with the first output of described EMC circuit, is used for arranging starting resistor; The first end of described pop wave absorbing circuit links to each other with the first output of described EMC circuit and the second end of described switch transformer, is used for absorbing peak voltage.
The first end of described governor circuit links to each other with the first output of described starting protection circuit; the second end links to each other with the second output of described starting protection circuit; the 3rd end respectively with the second input of described EMC circuit; the 3rd output of described starting protection circuit and the first end of described power circuit link to each other; the 4th end links to each other with the second end of described power circuit; five terminal links to each other with the 3rd end of described power circuit; the 6th end respectively with the 4th end of described power circuit; the second end of described pop wave absorbing circuit and the first end of described switch transformer link to each other; be used for comparing the size of predeterminated voltage and described power circuit sampled voltage, and produce conducting and shutoff that pwm signal is controlled the switching tube in the described power circuit.
IGBT driving power in the embodiment of the invention, the mode that has adopted transformer primary side to feed back has been saved the auxiliary winding of transformer secondary and optical coupling isolation circuit, so that circuit structure is simple, circuit devcie is less.
Concrete, the present invention also provides the particular circuit configurations of each built-up circuit in the driving power of a kind of IGBT of being applied to, and its annexation is as follows:
Described EMC circuit comprises: the first electric capacity and the second electric capacity, described the first electric capacity and described the second Capacitance parallel connection, its common port are respectively as the first output and second output of described EMC circuit.
Described starting protection circuit comprises: the first resistance, the second resistance and the 5th electric capacity; the first end of described the first resistance links to each other with the first output of described EMC circuit; the second end of described the first resistance links to each other with the first end of described the second resistance; the second end of described the second resistance links to each other with the second output of described EMC circuit; the first end of described the second resistance is as the first output of described starting protection circuit, and the first end of described the 5th electric capacity and the second end are successively as the second output and the 3rd output of described protection start-up circuit.
Described pop wave absorbing circuit comprises: the 3rd resistance, the 3rd electric capacity and the first diode, the first end of described the 3rd resistance links to each other with the first end of described the 3rd electric capacity, and the first end as described pop wave absorbing circuit, the second end of described the 3rd resistance links to each other with the second end of described the 3rd electric capacity and the negative electrode of described the first diode respectively, and the anode of described the first diode is as the second end of described pop wave absorbing circuit.
Described governor circuit comprises: main control chip, the 4th resistance and the 5th resistance; the EN of described main control chip end, S end, GND end, ISEN end, G end, VIN end are successively as first end, the second end, the 3rd end, the 4th end, the 7th end of described governor circuit; the VREF end of described main control chip links to each other with the 3rd input of described starting protection circuit by described the 4th resistance; the FB end of described governor circuit links to each other with the first end of described the 5th resistance, and the second end of described the 5th resistance is as the 6th end of described governor circuit.
Described power circuit comprises: the first switching tube and the 6th resistance, the first end of described the 6th resistance is as the first end of described power circuit, the second end of described the 6th resistance links to each other with the source electrode of described the first switching tube, and the second end as described power circuit, the grid of described the first switching tube is as the 3rd end of described power circuit, and the drain electrode of described the first switching tube is as the 4th end of described power circuit.
See also Fig. 3, the driving power of a kind of IGBT of being applied to provided by the invention also comprises at least one output circuit, every output circuit comprises: diode D201, capacitor C 201, capacitor C 202, capacitor C 203, voltage stabilizing didoe DZ21, resistance R 21, the anode of described diode D201 links to each other with the secondary Same Name of Ends of transformer, the negative electrode of described diode D201 links to each other with the first end of described capacitor C 201, the first end of described capacitor C 202 and the negative electrode of described voltage stabilizing didoe DZ21 respectively, and as the output plus terminal of described output circuit; The secondary different name end of described transformer links to each other with the second end of described capacitor C 201, the first end of described capacitor C 203 and the first end of described resistance R 21 respectively, and as the output negative terminal of described output circuit; The second end of described capacitor C 203 links to each other with the second end of described resistance R 21 and the anode of described voltage stabilizing didoe ZD21 respectively, and holds as the output ground of described output circuit.
In conjunction with the concrete annexation of foregoing circuit, as shown in Figure 4, the operation principle of driving power provided by the invention is described:
The EMC circuit carries out the filtering processing to the alternating current of input, so that input voltage is steady, the bleeder circuit that is composed in series by resistance R 1 and R2 carries out dividing potential drop to input voltage, among the present invention, can also be by the voltage threshold VREF among the voltage on the sampling resistor R2 and the main control chip IC1 being compared determine that 5 chargings arrange soft-start time to capacitor C for lowest starting voltage and the constant-current source by main control chip IC1 inside.Simultaneously, the VCC of main control chip IC1 end carries out filtering by capacitor C 4 ground connection.Main control chip IC1 passes through to be used for comparing the size of predeterminated voltage and described power circuit sampled voltage, and produces conducting and shutoff that pwm signal is controlled the switching tube in the described power circuit.The size of its output voltage determines that by feedback resistance and reference resistance computing formula is as follows:
Wherein, R
FBFor being connected to the feedback resistance of transformer primary side, R
REFBe reference resistance, N
PSBe the former secondary circle ratio of transformer, V
REFReference voltage for the chip internal comparator.
Need to prove that power device is MOSFET in the present embodiment, but is not limited to this.
In sum: the invention provides a kind of driving power for IGBT; comprise: EMC circuit, starting protection circuit, pop wave absorbing circuit, governor circuit, power circuit, switch transformer; wherein; the EMC circuit is used for the input AC electricity is carried out filtering; the starting protection circuit is used for arranging starting resistor; pop wave absorbing circuit is used for absorbing peak voltage; governor circuit is used for comparing the size of predeterminated voltage and described power circuit sampled voltage, and produces conducting and shutoff that pwm signal is controlled the switching tube in the described power circuit.Driving power provided by the invention adopts the mode of transformer primary side feedback, does not need to be coupled by the auxiliary winding of transformer secondary and described magnetic element, and circuit structure is simple, and cost is low, and it is little to take the PCB area.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the device that embodiment provides, because it is corresponding with the method that embodiment provides, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
Above-mentioned explanation to the embodiment that provides makes this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but principle and the features of novelty the widest consistent scope that provides with this paper will be provided.
Claims (7)
1. a driving power that is used for IGBT is characterized in that, comprising: EMC circuit, starting protection circuit, pop wave absorbing circuit, governor circuit, power circuit, switch transformer,
Described EMC circuit is used for the input AC electricity is carried out filtering;
The input of described starting protection circuit links to each other with the first output of described EMC circuit, is used for arranging starting resistor;
The first end of described pop wave absorbing circuit links to each other with the first output of described EMC circuit and the second end of described switch transformer, is used for absorbing peak voltage;
The first end of described governor circuit links to each other with the first output of described starting protection circuit; the second end links to each other with the second output of described starting protection circuit; the 3rd end respectively with the second input of described EMC circuit; the 3rd output of described starting protection circuit and the first end of described power circuit link to each other; the 4th end links to each other with the second end of described power circuit; five terminal links to each other with the 3rd end of described power circuit; the 6th end respectively with the 4th end of described power circuit; the second end of described pop wave absorbing circuit and the first end of described switch transformer link to each other; be used for comparing the size of predeterminated voltage and described power circuit sampled voltage, and produce conducting and shutoff that pwm signal is controlled the switching tube in the described power circuit.
2. driving power according to claim 1 is characterized in that, described EMC circuit comprises: the first electric capacity and the second electric capacity,
Described the first electric capacity and described the second Capacitance parallel connection, its common port are respectively as the first output and second output of described EMC circuit.
3. driving power according to claim 1 is characterized in that, described starting protection circuit comprises: the first resistance, the second resistance and the 5th electric capacity,
The first end of described the first resistance links to each other with the first output of described EMC circuit; the second end of described the first resistance links to each other with the first end of described the second resistance; the second end of described the second resistance links to each other with the second output of described EMC circuit; the first end of described the second resistance is as the first output of described starting protection circuit, and the first end of described the 5th electric capacity and the second end are successively as the second output and the 3rd output of described protection start-up circuit.
4. driving power according to claim 1 is characterized in that, described pop wave absorbing circuit comprises: the 3rd resistance, the 3rd electric capacity and the first diode,
The first end of described the 3rd resistance links to each other with the first end of described the 3rd electric capacity, and the first end as described pop wave absorbing circuit, the second end of described the 3rd resistance links to each other with the second end of described the 3rd electric capacity and the negative electrode of described the first diode respectively, and the anode of described the first diode is as the second end of described pop wave absorbing circuit.
5. driving power according to claim 1 is characterized in that, described governor circuit comprises: main control chip, the 4th resistance and the 5th resistance,
The EN of described main control chip end, S end, GND end, ISEN end, G end, VIN end are successively as first end, the second end, the 3rd end, the 4th end, the 7th end of described governor circuit; the VREF end of described main control chip links to each other with the 3rd input of described starting protection circuit by described the 4th resistance; the FB end of described governor circuit links to each other with the first end of described the 5th resistance, and the second end of described the 5th resistance is as the 6th end of described governor circuit.
6. driving power according to claim 1 is characterized in that, described power circuit comprises: the first switching tube and the 6th resistance,
The first end of described the 6th resistance is as the first end of described power circuit, the second end of described the 6th resistance links to each other with the source electrode of described the first switching tube, and the second end as described power circuit, the grid of described the first switching tube is as the 3rd end of described power circuit, and the drain electrode of described the first switching tube is as the 4th end of described power circuit.
7. driving power according to claim 1 is characterized in that, also comprises at least one output circuit, and every output circuit comprises: diode D201, capacitor C 201, capacitor C 202, capacitor C 203, voltage stabilizing didoe DZ21, resistance R 21,
The anode of described diode D201 links to each other with the secondary Same Name of Ends of transformer, the negative electrode of described diode D201 links to each other with the first end of described capacitor C 201, the first end of described capacitor C 202 and the negative electrode of described voltage stabilizing didoe DZ21 respectively, and as the output plus terminal of described output circuit;
The secondary different name end of described transformer links to each other with the second end of described capacitor C 201, the first end of described capacitor C 203 and the first end of described resistance R 21 respectively, and as the output negative terminal of described output circuit;
The second end of described capacitor C 203 links to each other with the second end of described resistance R 21 and the anode of described voltage stabilizing didoe ZD21 respectively, and holds as the output ground of described output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104493189A CN102904453A (en) | 2012-11-12 | 2012-11-12 | Driving power supply for insulated gate bipolar translator (IGBT) |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104493189A CN102904453A (en) | 2012-11-12 | 2012-11-12 | Driving power supply for insulated gate bipolar translator (IGBT) |
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| CN102904453A true CN102904453A (en) | 2013-01-30 |
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| CN2012104493189A Pending CN102904453A (en) | 2012-11-12 | 2012-11-12 | Driving power supply for insulated gate bipolar translator (IGBT) |
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| WO2018053960A1 (en) * | 2016-09-20 | 2018-03-29 | 深圳市华星光电技术有限公司 | Absorption circuit, power supply circuit, and liquid crystal display |
| CN107888076A (en) * | 2017-11-29 | 2018-04-06 | 重庆科凯前卫风电设备有限责任公司 | A kind of driving power of paddle change system of wind turbines |
| CN109756118A (en) * | 2017-11-02 | 2019-05-14 | 山东朗进科技股份有限公司 | A kind of double-ended power translation circuit |
| CN109905021A (en) * | 2017-12-11 | 2019-06-18 | 通用电气照明解决方案有限公司 | Power adapter, power conversion method and lighting device |
| CN115714138A (en) * | 2022-11-10 | 2023-02-24 | 上海功成半导体科技有限公司 | IGBT device and preparation method thereof |
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| CN115714138A (en) * | 2022-11-10 | 2023-02-24 | 上海功成半导体科技有限公司 | IGBT device and preparation method thereof |
| CN115714138B (en) * | 2022-11-10 | 2023-08-15 | 上海功成半导体科技有限公司 | IGBT device and preparation method thereof |
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Application publication date: 20130130 |