CN103269202A - Controller bootstrap type pre-charging self-discharging circuit - Google Patents
Controller bootstrap type pre-charging self-discharging circuit Download PDFInfo
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- CN103269202A CN103269202A CN2013101804975A CN201310180497A CN103269202A CN 103269202 A CN103269202 A CN 103269202A CN 2013101804975 A CN2013101804975 A CN 2013101804975A CN 201310180497 A CN201310180497 A CN 201310180497A CN 103269202 A CN103269202 A CN 103269202A
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Abstract
The invention discloses a controller bootstrap type pre-charging self-discharging circuit which is used for charging and discharging of a capacitor set. The controller bootstrap type pre-charging self-discharging circuit comprises a pre-charging circuit and a self-discharging circuit. The pre-charging circuit comprises a control port, triodes connected with the control port, a bootstrap circuit and a charging loop, wherein the bootstrap circuit and the charging loop are connected with collectors of the triodes. When the control port is at a high electric level, an MOS tube in the charging loop is disconnected and when the control port is at a low electric level, the MOS tube is connected, so that the bootstrap circuit and the charging loop start to work and a voltage difference between a D-electrode of the MOS tube and an S-electrode of the MOS tube is kept. The self-discharging circuit comprises a first triode and a second triode connected with a collector of the first triode. When power is on, the first triode is connected, so that the second triode is disconnected and a discharging loop is disconnected; and when the power is off, the first triode is disconnected and the second triode is connected and starts to discharge. Therefore, charging and discharging can be conducted slowly and the safety of a system and an operation can be well guaranteed.
Description
Technical field
The present invention relates to electric machine controller, relate in particular to a kind of controller bootstrap type precharge self discharge circuit.
Background technology
At present, at high-power controller, charger, frequency converter in the electric equipments such as DC/DC, all contains large bulk capacitance, or capacitance group, these big electric capacity directly link to each other with power supply, because the characteristics of electric capacity self, in power supply electrifying moment, can produce a very big current impulse, components and parts that one side may the damaged circuit plate so 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, perhaps 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 take place, comprehensive above consideration, design precharge self discharge circuit, better guaranteed the safety of system, and operator's safety.
Summary of the invention
The object of the present invention is to provide a kind of safe controller bootstrap type precharge self discharge circuit.
For achieving the above object, the present invention adopts following technical scheme: a kind of controller bootstrap type precharge self discharge circuit, be used 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 links to each other 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 the 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 first triode and connects second triode of first transistor collector that when powering on, the first triode conducting causes second triode to be closed, the discharge loop disconnection; During outage, first triode is closed, and second triode is opened discharge.
As a further improvement on the present invention, the collector electrode of described triode is connected to the G utmost point of metal-oxide-semiconductor.
As a further improvement on the present invention, described boostrap circuit comprises first power supply, first diode, electric capacity and second diode that connects successively.
As a further improvement on the present invention, the negative pole of described electric capacity is connected to the S utmost point of metal-oxide-semiconductor.
As a further improvement on the present invention, described charge circuit is parallel with two resistance.
As a further improvement on the present invention, described first transistor collector is connected to the base stage of second triode.
As a further improvement on the present invention, the collector electrode of described second triode is parallel with three resistance and is connected to capacitance group respectively.
As a further improvement on the present invention, the collector electrode of described first triode is connected to capacitance group by a resistance.
Compared with prior art, controller bootstrap type precharge self discharge circuit of the present invention can make to discharge and recharge slowly and carry out, and better guarantees system safety, and operator's safety.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing relevant of the present invention in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Figure 1 shows that the pre-charge circuit among the present invention.
Figure 2 shows that the self discharge circuit among the present invention.
Embodiment
Describe the present invention below with reference to each embodiment shown in the drawings.But these embodiment do not limit the present invention, and the conversion on the structure that those of ordinary skill in the art makes according to these embodiment, method or the function all is included in protection scope of the present invention.
As shown in Figure 1, pre-charge circuit operation principle of the present invention: 1, this circuit is mainly by control circuit, boostrap circuit, and charge circuit constitutes, 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 begins charging; 2, boostrap circuit comprises electric capacity E300, R301, D300(first diode), D302(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 makes electric capacity E300 anode voltage be elevated to about 81V gradually by this boostrap circuit, cathode voltage is elevated to about 72V, the E300 negative electrode is connected to the S utmost point of Q300, thereby has guaranteed the voltage about 8V 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 the Q300, RR304 and the D301 that is connected with capacitance group, and as metal-oxide-semiconductor G very during high level, metal-oxide-semiconductor is opened, and by charge circuit capacitance group is begun to charge.
Self discharge circuit working principle: this circuit comprises two parts, the one, and by R303, R304, R300, Q301(first triode) control loop of Zu Chenging is used for the control discharge circuit, and the 2nd, by RR300, RR301, RR302, Q303(second triode), form discharge circuit.When the 72V power supply was powered, control loop was by R303, and the dividing potential drop of R304 makes triode Q301 saturation conduction, is low level thereby make triode Q303 base stage, and Q303 closes, so when the 72V power supply was powered, discharge loop disconnected; 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 and carry out, better guarantee system safety, and operator's safety.
Be to be understood that, though this specification is described according to execution mode, but be not that each execution mode only comprises an independently technical scheme, this narrating mode of specification only is for clarity sake, those skilled in the art should make specification as a whole, technical scheme in each execution mode also can form other execution modes that it will be appreciated by those skilled in the art that through appropriate combination.
Above listed a series of detailed description only is specifying at feasibility execution mode of the present invention; they are not in order to limiting protection scope of the present invention, allly do not break away from equivalent execution mode or the change that skill spirit of the present invention does and all should be included within protection scope of the present invention.
Claims (8)
1. controller bootstrap type precharge self discharge circuit, be used 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 links to each other 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 the 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 first triode and connects second triode of first transistor collector that when powering on, the first triode conducting causes second triode to be closed, the discharge loop disconnection; During outage, first triode is closed, and second triode is opened 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 first power supply, first diode, electric capacity and 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. according to each described a kind of controller bootstrap type precharge self discharge circuit in the claim 1 to 4, it 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 first transistor collector is connected to the base stage of 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 second triode is parallel with three resistance and is connected to capacitance group respectively.
8. a kind of controller bootstrap type precharge self discharge circuit according to claim 7 is characterized in that the collector electrode of described first triode is connected to capacitance group by a resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101804975A CN103269202A (en) | 2013-05-16 | 2013-05-16 | Controller bootstrap type pre-charging self-discharging circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101804975A CN103269202A (en) | 2013-05-16 | 2013-05-16 | Controller bootstrap type pre-charging self-discharging circuit |
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| CN103269202A true CN103269202A (en) | 2013-08-28 |
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| CN2013101804975A Pending CN103269202A (en) | 2013-05-16 | 2013-05-16 | Controller bootstrap type pre-charging self-discharging circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425705A (en) * | 2016-05-24 | 2017-12-01 | 上海安浦鸣志自动化设备有限公司 | A kind of back-emf leadage circuit for DC driver |
| CN113097984A (en) * | 2021-04-29 | 2021-07-09 | 珠海格力电器股份有限公司 | Energy storage discharge circuit, variable frequency drive circuit, variable frequency motor and electric equipment |
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| CN201805353U (en) * | 2010-08-30 | 2011-04-20 | 天津市松正电动科技有限公司 | Pre-charged control circuit |
| CN102055452A (en) * | 2009-11-05 | 2011-05-11 | 联创汽车电子有限公司 | N-type channel MOS transistor driving circuit |
| CN102142833A (en) * | 2011-01-24 | 2011-08-03 | 常州汇邦电子有限公司 | Silicon controlled trigger circuit |
| US8115518B1 (en) * | 2010-08-16 | 2012-02-14 | Analog Devices, Inc. | Integrated circuit for reducing nonlinearity in sampling networks |
| CN202586329U (en) * | 2012-05-25 | 2012-12-05 | 深圳市中兴昆腾有限公司 | Self-discharge circuit |
| CN203301365U (en) * | 2013-05-16 | 2013-11-20 | 苏州益高电动车辆制造有限公司 | Bootstrap-type pre-charge self-discharge circuit of controller |
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2013
- 2013-05-16 CN CN2013101804975A patent/CN103269202A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055452A (en) * | 2009-11-05 | 2011-05-11 | 联创汽车电子有限公司 | N-type channel MOS transistor driving circuit |
| US8115518B1 (en) * | 2010-08-16 | 2012-02-14 | Analog Devices, Inc. | Integrated circuit for reducing nonlinearity in sampling networks |
| CN201805353U (en) * | 2010-08-30 | 2011-04-20 | 天津市松正电动科技有限公司 | Pre-charged control circuit |
| CN102142833A (en) * | 2011-01-24 | 2011-08-03 | 常州汇邦电子有限公司 | Silicon controlled trigger circuit |
| CN202586329U (en) * | 2012-05-25 | 2012-12-05 | 深圳市中兴昆腾有限公司 | Self-discharge circuit |
| CN203301365U (en) * | 2013-05-16 | 2013-11-20 | 苏州益高电动车辆制造有限公司 | Bootstrap-type pre-charge self-discharge circuit of controller |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425705A (en) * | 2016-05-24 | 2017-12-01 | 上海安浦鸣志自动化设备有限公司 | A kind of back-emf leadage circuit for DC driver |
| CN107425705B (en) * | 2016-05-24 | 2023-04-14 | 上海安浦鸣志自动化设备有限公司 | Counter potential bleeder circuit for DC driver |
| CN113097984A (en) * | 2021-04-29 | 2021-07-09 | 珠海格力电器股份有限公司 | Energy storage discharge circuit, variable frequency drive circuit, variable frequency motor and electric equipment |
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Application publication date: 20130828 |