CN203301365U - Bootstrap-type pre-charge self-discharge circuit of controller - Google Patents
Bootstrap-type pre-charge self-discharge circuit of controller Download PDFInfo
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- CN203301365U CN203301365U CN2013202658079U CN201320265807U CN203301365U CN 203301365 U CN203301365 U CN 203301365U CN 2013202658079 U CN2013202658079 U CN 2013202658079U CN 201320265807 U CN201320265807 U CN 201320265807U CN 203301365 U CN203301365 U CN 203301365U
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- triode
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- discharge circuit
- self discharge
- charge
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Abstract
The utility model discloses a bootstrap-type pre-charge self-discharge circuit of a controller. The circuit is used for charge and discharge of a capacitor pack. The circuit comprises a pre-charge circuit and a self-discharge circuit. The pre-charge circuit comprises a control port, a triode connected with the control port, a bootstrap circuit connected to a collector electrode of the triode and a charging loop. When the control port is high level, a MOS pipe in the charging loop is turned off. When the control port is low level, the MOS pipe is conducted, the bootstrap circuit and the charging loop work, and a D pole an S pole of the MOS pipe maintain a voltage difference. The self-discharge circuit comprises a first triode and a second triode connected with a collector electrode of the first triode. When power is on, the first triode is conducted so that the second triode is closed and the discharge loop is disconnected. When power is off, the first triode is closed and the second triode is opened and discharges. Therefore, the charge and discharge can be performed slowly so that system safety and operator safety can be guaranteed.
Description
Technical field
The utility model relates to electric machine controller, relates in particular to a kind of controller bootstrap type precharge self discharge circuit.
Background technology
At present, at big power controller, charger, frequency converter, in the electric equipments such as DC/DC, all contain large bulk capacitance, or capacitance group, these large electric capacity directly are connected with power supply, due to the characteristics of electric capacity self, in power supply electrifying moment, can produce a very large current impulse, the components and parts that one side may the damaged circuit plate like this, on the other hand also can be dangerous, connecting moment, connection place can produce spark.After the electric equipment outage, because electric capacity has the energy storage effect, the electric capacity two ends may have very high voltage, or electric charge, if misoperation connects together electric capacity and some circuit, will be short-circuited, thereby damage system, even also Danger Electric shock risk may occur, comprehensive above consideration, design precharge self discharge circuit, better guaranteed the safety of system, and operator's safety.
The utility model content
The purpose of this utility model is to provide a kind of safe controller bootstrap type precharge self discharge circuit.
For achieving the above object, the utility model adopts following technical scheme: a kind of controller bootstrap type precharge self discharge circuit, for discharging and recharging of capacitance group, comprise pre-charge circuit and self discharge circuit, described pre-charge circuit comprises control port, the triode that is connected with control port, the boostrap circuit that is connected to transistor collector and charge circuit, when control port is high level, metal-oxide-semiconductor in charge circuit turn-offs, when control port is low level, the metal-oxide-semiconductor conducting, boostrap circuit and charge circuit work, and make the metal-oxide-semiconductor D utmost point and the S utmost point keep voltage difference; Described self discharge circuit comprises the first triode and connects the second triode of the first transistor collector, and while powering on, the first triode conducting, cause the second triode to be closed, and discharge loop disconnects; During outage, the first triode is closed, and the second triode is opened electric discharge.
As further improvement of the utility model, the collector electrode of described triode is connected to the G utmost point of metal-oxide-semiconductor.
As further improvement of the utility model, described boostrap circuit comprises the first power supply, the first diode, electric capacity and the second diode that connects successively.
As further improvement of the utility model, the negative pole of described electric capacity is connected to the S utmost point of metal-oxide-semiconductor.
As further improvement of the utility model, described charge circuit is parallel with two resistance.
As further improvement of the utility model, described the first transistor collector is connected to the base stage of the second triode.
As further improvement of the utility model, the collector electrode of described the second triode is parallel with three resistance and is connected to respectively capacitance group.
As further improvement of the utility model, the collector electrode of described the first triode is connected to capacitance group by a resistance.
Compared with prior art, the utility model controller bootstrap type precharge self discharge circuit can make to discharge and recharge slowly and carry out, and better guarantees system safety, and operator's safety.
The accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing relevant of the present utility model in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Figure 1 shows that the pre-charge circuit in the utility model.
Figure 2 shows that the self discharge circuit in the utility model.
Embodiment
Below with reference to each embodiment shown in the drawings, the utility model is described in detail.But these embodiment do not limit the utility model, and the conversion on the structure that those of ordinary skill in the art makes according to these embodiment, method or function all is included in protection range of the present utility model.
As shown in Figure 1, the utility model pre-charge circuit operation principle: 1, this main circuit will be by control circuit, boostrap circuit, and charge circuit forms, control circuit comprises R302, connect the D303 of R302 and the R306 of connection D303, control port Pre_charge is connected to the base stage of Q302, and R305 is connected to the emitter of Q302; When control port Pre_charge was high level, triode Q302 saturation conduction, the collector electrode of Q302 were connected to the G utmost point of metal-oxide-semiconductor, made very low level of metal-oxide-semiconductor G, thereby metal-oxide-semiconductor is turn-offed; When control port Pre_charge was low level, Q302 closed, and metal-oxide-semiconductor G is high level very, made the metal-oxide-semiconductor D utmost point and the conducting of the S utmost point, and capacitance group starts charging; 2, boostrap circuit comprises electric capacity E300, R301, D300(the first diode), D302(the second diode), along with the charging to capacitance group, the positive electrode potential of capacitance group increases gradually, and boostrap circuit is started working, and by this boostrap circuit, makes electric capacity E300 anode voltage be elevated to gradually the 81V left and right, cathode voltage is elevated to the 72V left and right, the E300 negative electrode is connected to the S utmost point of Q300, thereby has guaranteed the voltage of 8V left and right between the metal-oxide-semiconductor S utmost point and the D utmost point, has guaranteed that MOS continues conducting; 3, charge circuit comprises the RR303 that is connected in parallel between power supply and Q300, RR304 and the D301 that is connected with capacitance group, and very during high level, metal-oxide-semiconductor is opened, and by charge circuit, capacitance group is started to charge as metal-oxide-semiconductor G.
Self discharge circuit working principle: this circuit comprises two parts, the one, and by R303, R304, R300, Q301(the first triode) control loop that forms, for the controlled discharge circuit, the 2nd, by RR300, RR301, RR302, Q303(the second triode), form discharge circuit.When the 72V Power supply, control loop is by R303, and the dividing potential drop of R304, make triode Q301 saturation conduction, thereby make triode Q303 base stage, is low level, and Q303 closes, so when the 72V Power supply, discharge loop disconnects; When the 72V power supply disconnected, the Q301 base stage was low level, so Q301 closes, the Q303 base voltage is high, make discharge loop open-minded, capacitance group is discharged rapidly by discharge loop, and by revising resistance R R300, RR301, RR302, R300 can change the velocity of discharge of capacitance group.
So can make to discharge and recharge slowly to carry out, better guarantee system safety, and operator's safety.
Be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should make specification as a whole, technical scheme in each execution mode also can, through appropriate combination, form other execution modes that it will be appreciated by those skilled in the art that.
Above listed a series of detailed description is only illustrating for feasibility execution mode of the present utility model; they are not in order to limit protection range of the present utility model, all disengaging within equivalent execution mode that the utility model skill spirit does or change all should be included in protection range of the present utility model.
Claims (8)
1. controller bootstrap type precharge self discharge circuit, for discharging and recharging of capacitance group, it is characterized in that, comprise pre-charge circuit and self discharge circuit, described pre-charge circuit comprises control port, the triode that is connected with control port, the boostrap circuit that is connected to transistor collector and charge circuit, when control port is high level, metal-oxide-semiconductor in charge circuit turn-offs, when control port is low level, the metal-oxide-semiconductor conducting, boostrap circuit and charge circuit work, and make the metal-oxide-semiconductor D utmost point and the S utmost point keep voltage difference; Described self discharge circuit comprises the first triode and connects the second triode of the first transistor collector, and while powering on, the first triode conducting, cause the second triode to be closed, and discharge loop disconnects; During outage, the first triode is closed, and the second triode is opened electric discharge.
2. a kind of controller bootstrap type precharge self discharge circuit according to claim 1, is characterized in that, the collector electrode of described triode is connected to the G utmost point of metal-oxide-semiconductor.
3. a kind of controller bootstrap type precharge self discharge circuit according to claim 1, is characterized in that, described boostrap circuit comprises the first power supply, the first diode, electric capacity and the second diode that connects successively.
4. a kind of controller bootstrap type precharge self discharge circuit according to claim 3, is characterized in that, the negative electrode of described electric capacity is connected to the S utmost point of metal-oxide-semiconductor.
5. the described a kind of controller bootstrap type precharge self discharge circuit of any one according to claim 1 to 4, is characterized in that, described charge circuit is parallel with two resistance.
6. a kind of controller bootstrap type precharge self discharge circuit according to claim 1, is characterized in that, described the first transistor collector is connected to the base stage of the second triode.
7. a kind of controller bootstrap type precharge self discharge circuit according to claim 6, is characterized in that, the collector electrode of described the second triode is parallel with three resistance and is connected to respectively capacitance group.
8. a kind of controller bootstrap type precharge self discharge circuit according to claim 7, is characterized in that, the collector electrode of described the first triode is connected to capacitance group by a resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202658079U CN203301365U (en) | 2013-05-16 | 2013-05-16 | Bootstrap-type pre-charge self-discharge circuit of controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202658079U CN203301365U (en) | 2013-05-16 | 2013-05-16 | Bootstrap-type pre-charge self-discharge circuit of controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203301365U true CN203301365U (en) | 2013-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202658079U Expired - Lifetime CN203301365U (en) | 2013-05-16 | 2013-05-16 | Bootstrap-type pre-charge self-discharge circuit of controller |
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| Country | Link |
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| CN (1) | CN203301365U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269202A (en) * | 2013-05-16 | 2013-08-28 | 苏州益高电动车辆制造有限公司 | Controller bootstrap type pre-charging self-discharging circuit |
| CN105846665A (en) * | 2016-04-28 | 2016-08-10 | 南京航空航天大学 | Normally open SiC JFET drive circuit having self protection function |
-
2013
- 2013-05-16 CN CN2013202658079U patent/CN203301365U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269202A (en) * | 2013-05-16 | 2013-08-28 | 苏州益高电动车辆制造有限公司 | Controller bootstrap type pre-charging self-discharging circuit |
| CN105846665A (en) * | 2016-04-28 | 2016-08-10 | 南京航空航天大学 | Normally open SiC JFET drive circuit having self protection function |
| CN105846665B (en) * | 2016-04-28 | 2018-12-07 | 南京航空航天大学 | A kind of normal open type SiC JFET driving circuit with self-protection function |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |
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| CX01 | Expiry of patent term |