CN107241015A - Discharge circuit and drive board - Google Patents
Discharge circuit and drive board Download PDFInfo
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- CN107241015A CN107241015A CN201710649285.5A CN201710649285A CN107241015A CN 107241015 A CN107241015 A CN 107241015A CN 201710649285 A CN201710649285 A CN 201710649285A CN 107241015 A CN107241015 A CN 107241015A
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- 230000008569 process Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
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Abstract
The invention discloses a discharge circuit and a drive board. Wherein, this discharge circuit includes: the inverting module is used for converting the first level voltage input from the input end into a second level voltage and outputting the second level voltage from the output end; the switching tube is connected with the output end of the phase inversion module and used for being switched on or switched off according to the second level voltage; and the discharging module is connected with the switching tube in series and is used for discharging the object to be discharged under the condition that the switching tube is conducted. The invention solves the technical problem of slow discharge after the power failure of the driving plate caused by a plurality of electrolytic capacitors between the buses.
Description
Technical Field
The invention relates to the field of circuit control, in particular to a discharge circuit and a drive board.
Background
For the driving plate of the compressor, because a plurality of electrolytic capacitors exist among the buses of the driving plate, after the driving plate is powered off, the voltage on the buses does not drop immediately, but a long-time discharging process is carried out, and long time is needed for waiting for discharging the electricity, so that the time is wasted.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a discharge circuit and a drive board, which at least solve the technical problem of slow discharge of the drive board after power failure due to the existence of a plurality of electrolytic capacitors between buses.
According to an aspect of an embodiment of the present invention, there is provided a discharge circuit including: the inverting module is used for converting a first level voltage input from an input end into a second level voltage and outputting the second level voltage from an output end; a switching tube connected to the output terminal of the inverting module and configured to be turned on or off according to the second level voltage; and the discharging module is connected with the switching tube in series and is used for discharging the object to be discharged under the condition that the switching tube is conducted.
Optionally, the discharge circuit further comprises: and the power supply module is connected with the power end of the phase reversal module and is used for providing a working power supply for the phase reversal module.
Optionally, the power supply module includes a first voltage-dividing resistor, a second voltage-dividing resistor, and a filter capacitor; wherein, the input end of the first divider resistor is connected with the object to be discharged, and the output end of the first divider resistor is connected with the power supply end of the inverting module; the input end of the second divider resistor is connected with the output end of the first divider resistor, and the output end of the second divider resistor is grounded; the filter capacitor is connected in parallel to the second voltage dividing resistor.
Optionally, the inverting module comprises an inverter.
Optionally, the preset threshold of the inverter is greater than a minimum value of a turn-on voltage of an IGBT (Insulated Gate bipolar transistor), and the preset threshold refers to a maximum value of a low level recognized by the inverter.
Optionally, the input terminal of the inverting module is connected to an output terminal of a switching power supply.
Optionally, the switching tube includes a MOS tube; the grid electrode of the MOS tube is connected with the output end of the inverting module, the drain electrode of the MOS tube is connected with the output end of the discharging module, and the source electrode of the MOS tube is grounded.
Optionally, the discharge module includes a discharge resistor, wherein an input terminal of the discharge resistor is connected to the object to be discharged.
Optionally, the object to be discharged includes at least one electrolytic capacitor connected in series, and the discharge circuit is connected in parallel with the object to be discharged.
According to another aspect of the embodiments of the present invention, there is also provided a driving board including: a discharge circuit having any of the features described above.
In an embodiment of the present invention, the discharge circuit includes an inverting module for converting a first level voltage input from an input terminal into a second level voltage and outputting the second level voltage from an output terminal; the switching tube is connected with the output end of the phase inversion module and used for being switched on or switched off according to the second level voltage; the discharging module is connected with the switch tube in series and used for discharging for an object to be discharged under the condition that the switch tube is switched on, a discharging circuit connected to a bus is additionally arranged in the driving plate, the switching-on and switching-off of the switch tube are controlled by the reverse module, the discharging module is controlled to discharge for the bus, the purpose of accelerating the discharging speed of the bus is achieved, the discharging speed is improved, the time is saved, the technical effect of enhancing the safety of the driving plate is achieved, and the technical problem that the discharging is slow after the driving plate is powered off due to the fact that a plurality of electrolytic capacitors exist between the buses is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of an alternative discharge circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative discharge circuit in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of yet another alternative discharge circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of yet another alternative discharge circuit in accordance with an embodiment of the present invention;
FIG. 5(a) is a schematic diagram of an alternative drive plate configuration according to an embodiment of the present invention;
fig. 5(b) is a schematic structural diagram of still another alternative discharge circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to an embodiment of the present invention, an embodiment of a discharge circuit is provided, and fig. 1 is a schematic structural diagram of the discharge circuit according to the embodiment of the present invention, and as shown in fig. 1, the discharge circuit may include: an inverting module 10 for converting a first level voltage input from an input terminal into a second level voltage and outputting the second level voltage from an output terminal; the switching tube 12 is connected with the output end of the inverting module 10 and used for being switched on or switched off according to the second level voltage; and the discharging module 14 is connected in series with the switching tube 12 and is used for discharging the object to be discharged when the switching tube 12 is conducted.
When the driving board normally works, a high level voltage (for example, 15V) is input to the input end of the inverter module 10, the inverter module 10 converts the high level voltage into a low level voltage and outputs the low level voltage, and at this time, the switching tube 12 is turned off; when the driving board is powered off, because there are many electrolytic capacitors between the buses, the voltage on the buses will not drop rapidly, and the voltage input by the input end of the inverter module 10 will drop rapidly, then the low-level voltage is input by the input end of the inverter module 10, the inverter module 10 converts the low-level voltage into a high-level voltage and outputs the high-level voltage, at this time, the switch tube 12 is turned on, the discharge module 14 discharges the object to be discharged, so that the voltage on the buses drops rapidly, that is, the voltage discharging the electrolytic capacitors is equivalent to discharging the buses.
In the embodiment of the present invention, the discharge circuit includes an inverting module 10 for converting a first level voltage input from an input terminal into a second level voltage and outputting the second level voltage from an output terminal; the switching tube 12 is connected with the output end of the inverting module 10 and used for being switched on or switched off according to the second level voltage; the discharging module 14 is connected in series with the switch tube 12 and used for discharging an object to be discharged under the condition that the switch tube 12 is switched on, and a discharging circuit connected to a bus is additionally arranged in the driving board, so that the purpose of accelerating the discharging speed of the bus is achieved, the technical effects of improving the discharging speed, saving time and enhancing the safety of the driving board are achieved, and the technical problem that the discharging is slow after the driving board is powered off due to the fact that a lot of electrolytic capacitors exist between the buses is solved.
As an alternative implementation, as shown in fig. 2, the discharge circuit may further include: and the power supply module 14 is connected with the power end of the inverter module 10 and is used for providing working power for the inverter module 10.
The power supply module 14 is connected to the bus (P end in fig. 2), when the driving board is powered on, the bus is powered on (540V), and the power on the bus is divided by the power supply module 14 to obtain a relatively moderate voltage, which can supply power to the inverter module 10, that is, as long as the bus has power, the power is divided by the power supply module 14 to supply power to the inverter module 10; when the voltage on the bus is discharged, the power supply module 14 no longer supplies power, the inverter module 10 also stops working, and the discharge circuit is disconnected.
In the discharging circuit of the embodiment, a discharging module 14 is arranged on the bus side (P end in fig. 2) and connected in series with the switching tube 12, the inverting module 10 provides a conducting signal of the switching tube 12, and the discharging module 14 is controlled to discharge for the bus, wherein the working power supply of the inverting module 10 is obtained by dividing the bus voltage, after the bus voltage is discharged, the inverting module 10 stops working, and the discharging circuit is disconnected.
As an alternative implementation, as shown in fig. 3, the power supply module 14 includes a first voltage-dividing resistor 140, a second voltage-dividing resistor 142, and a filter capacitor 144; wherein, the input end of the first voltage-dividing resistor 140 is connected with the object to be discharged, and the output end of the first voltage-dividing resistor 140 is connected with the power end of the inverter module 10; the input end of the second voltage-dividing resistor 142 is connected with the output end of the first voltage-dividing resistor 140, and the output end of the second voltage-dividing resistor 142 is grounded; the filter capacitor 144 is connected in parallel with the second voltage-dividing resistor 142.
The first voltage dividing resistor 140 and the second voltage dividing resistor 142 are used as voltage dividing resistors to divide the voltage on the bus to a lower level (that is, a range meeting the power supply voltage requirement of the inverter module 10) to supply power to the inverter module 10, and the range meeting the voltage withstanding and power requirements and considering the range of the power supply voltage requirement of the inverter are also needed; the filter capacitor 144 is used to stabilize the voltage to supply power to the inverter module 10, so that the inverter module 10 operates more stably.
As an alternative implementation, the inversion module 10 comprises an inverter. Among them, the inverter is a device that can invert the phase of an input signal by 180 degrees.
Optionally, the preset threshold of the inverter is greater than the minimum value of the IGBT turn-on voltage, and the preset threshold refers to the maximum value of the low level recognized by the inverter.
The IGBT is a composite fully-controlled voltage-driven power semiconductor device consisting of a BJT (bipolar transistor) and an MOS (insulated gate field effect transistor), and has the advantages of both high input impedance of a metal-oxide semiconductor field effect transistor and low conduction voltage drop of a power transistor.
In the embodiment, the inverter is used as a key device of the discharge circuit, the power supply and input requirements are high, a wider working voltage range is required in the aspect of power supply, the inverter can work under normal bus voltage and lower bus voltage, the high-voltage is guaranteed not to be damaged, and the discharge circuit can be maintained to work under the low-voltage; in terms of input, the maximum value of the low level recognized by the inverter (i.e., the preset threshold) needs to be greater than the minimum value of the IGBT on-voltage, that is, for the inverter, only a digital signal is recognized, that is, only a high level or a low level is recognized, and the maximum value of the low level refers to that if the highest threshold of the low level recognized by the inverter is higher than the value, the inverter recognizes that the input signal is a high level. When the driving board is powered off, 15V output by a switching power supply will drop, the 15V will be input into the inverter, if the maximum value of the low level identified by the inverter is lower than the minimum value of the IGBT conducting voltage, the IGBT can be conducted by mistake when the 15V drops to the minimum value of the IGBT conducting voltage, and the bus bar is electrified, so the IGBT has the danger of short circuit, therefore, the maximum value of the low level identified by the inverter is higher than the minimum value of the IGBT conducting voltage, the danger of short circuit of the IGBT is avoided, and the safety of the driving board is improved.
Optionally, the input terminal of the inverting module 10 is connected to the output terminal of the switching power supply 2.
The switching power supply can be a zero-live wire switching power supply, in the process of electrifying and starting the driving plate, the speed of establishing the switching power supply needs to be greater than the speed of establishing the bus voltage, the inverting module 10 works normally after electrifying, the output end of the switching power supply outputs high level voltage (for example, 15V), the input end of the inverting module 10 inputs the high level voltage, the output end of the inverting module 10 outputs low level voltage, the switching tube 12 is disconnected (namely, can not be connected), the discharging circuit can not be connected, and normal starting use is guaranteed. When the drive board is powered down, the bus voltage cannot drop rapidly, but the switching power supply stops working, the 15V drop speed output by the switching power supply is far greater than the bus voltage drop speed, so that the inverting module 10 can continue working due to the fact that the inverting module 10 is powered by the bus voltage division, and the switching power supply can conduct a discharge circuit due to the fact that the switching power supply output voltage drops rapidly, low-level voltage is input to the input end of the inverting module 10, high-level voltage is output to the output end of the inverting module 10, the switching tube 12 can be conducted, and the bus can be discharged.
As an alternative implementation, as shown in fig. 4, the switching tube 12 includes a MOS tube; the gate (terminal G in fig. 4) of the MOS transistor is connected to the output terminal of the inverter module 10, the drain (terminal D in fig. 4) of the MOS transistor is connected to the output terminal of the discharge module 14, and the source (terminal S in fig. 4) of the MOS transistor is grounded.
Optionally, the discharge module 14 includes a discharge resistor, wherein an input terminal of the discharge resistor is connected to the object to be discharged.
It should be noted that the discharge resistor functions to discharge the object to be discharged, and therefore, whether the withstand voltage and the power of the resistor are reasonable or not should be considered in the model selection.
Optionally, the object to be discharged comprises at least one electrolytic capacitor connected in series with each other, the discharge circuit being connected in parallel with the object to be discharged.
The discharging circuit of the embodiment is connected in parallel at two ends of the at least one electrolytic capacitor which is mutually connected in series, and discharges the at least one electrolytic capacitor which is mutually connected in series equivalently to the bus, so that the voltage of the bus is rapidly reduced.
As shown in fig. 5(a), the driving board of the present embodiment includes a discharge circuit 1, a switching power supply 2, a rectifier bridge 3, an electrolytic capacitor 4, and an IGBT 5.
The switching power supply 2 mainly supplies power to the whole driving board to supply electric energy, so that the whole driving board normally works, and specifically, 220V alternating current (namely, a phase live wire L1 and a phase zero wire N in fig. 5 (a)) is supplied to the switching power supply 2, so that a stable voltage of 15V can be obtained at the output end of the switching power supply 2 to supply power to each component on the driving board; the rectifier bridge 3 is used for rectifying alternating current to form direct current so as to realize frequency conversion, and the output of the rectifier bridge 3 is the voltage of a bus (P); in fig. 5(a), the electrolytic capacitor 4 at the rear side of the rectifier bridge 3 is used for stabilizing voltage after rectification, and because of the existence of the electrolytic capacitor 4, when the driving board is powered off (which is equivalent to the bus power off), since the voltage at the two ends of the electrolytic capacitor 4 cannot suddenly change, the bus (P) has continuous electric energy, the discharging circuit 1 of the embodiment discharges the electrolytic capacitor 4, and further discharges the voltage of the bus (P); in fig. 5(a), the IGBT 5 is a driving circuit, the IGBT 5 is turned on by applying a voltage of 15V to the gate of the IGBT 5, and if the applied voltage is less than 15V, for example, 7V, 8V or lower (i.e., the minimum value of the IGBT on voltage mentioned in the above embodiment), the IGBT 5 is turned off, so that the motor rotation is controlled by controlling the on and off of the IGBT 5.
With reference to fig. 5(a) and 5(b), C1 and C2 are electrolytic capacitors (in fig. 5(b), two electrolytic capacitors are present as an example, the number of the electrolytic capacitors is determined according to the current level of the driving board, and this embodiment is not limited thereto), and R1 is a discharge resistor which mainly functions as bus discharge (which may also be understood as C1 and C2 discharge), so whether the withstand voltage and power of the resistor are reasonable or not should be considered in the model selection; the MOS tube Q1 is connected in series on a bus (P) loop, wherein the MOS tube Q1 has three pins which are respectively a grid (G), a source (S) and a drain (D), and the current, the voltage-resistant grade, the conduction loss and the like of the MOS tube are considered; r2 and R3 are used as voltage dividing resistors to divide the bus voltage to a lower level to supply power for the inverter U1, and the range of the supply voltage requirement of the inverter U1 is considered while the requirements of withstand voltage and power are met; the C3 is used as a filter capacitor to stabilize voltage to supply power to the inverter U1 (when the driving board is powered on, the bus is powered on (540V), and the electricity on the bus is divided by the R2 and the R3 to obtain a moderate voltage, namely the electricity can be supplied to the inverter U1, and the voltage can be divided by the divider resistors R2 and R3 to supply power to the inverter U1 as long as the bus is powered on); the inverter U1, as a key device in the discharging circuit 1 of the present embodiment, has high power supply and input requirements, and needs a wide operating voltage range in power supply, and can operate under normal bus voltage as well as low bus voltage, so as to ensure that the discharging circuit is not damaged under high voltage, and can maintain the operation of the discharging circuit under low voltage, and the input end of the inverter U1 is higher than the minimum value of the turn-on voltage of the IGBT 5 for the maximum value of the identified low level (where, for the inverter U1, only other digital signals are used, i.e. it only identifies high level or low level, and the maximum value of the low level refers to that if the highest threshold value of the low level that can be identified by the inverter U1 is higher than this value, the inverter U1 considers that the input signal is a high level), because a voltage of about 15V to 20V needs to be added between the gate and the emitter of the IGBT 5 to turn on the IGBT 5, when the driving board is powered off, the 15V output by the switching power supply 2 will drop, and the 15V will be input into the inverter, if the maximum value of the low level identified by the inverter U1 is lower than the minimum value of the turn-on voltage of the IGBT 5, when the 15V drops to the minimum value of the turn-on voltage of the IGBT 5, the IGBT 5 will be turned on by mistake, and the bus will still be powered at this time, so there is still a risk of short circuit, therefore, the maximum value of the input end of the inverter U1 in the discharging circuit of this embodiment for the identified low level will be greater than the minimum value of the turn-on voltage of the IGBT 5.
The specific working principle is as follows: in the process of electrifying and starting the driving plate, the zero-live wire switching power supply 2 is used, the establishment speed of the switching power supply 2 is also larger than the bus voltage establishment speed, so that after the driving plate is electrified, the phase inverter U1 can normally work, the input end is 15V, the output end is a low level, the MOS tube Q1 cannot be conducted, the discharge circuit cannot be conducted, and normal startup use is guaranteed. When the driving board is powered down, the bus voltage cannot drop rapidly (due to the existence of electrolytic capacitors among buses), but the switching power supply 2 stops working, the output 15V of the switching power supply drops rapidly (when the switching power supply 2 does not have input, the output end of the switching power supply is connected with a load, the load consumes electric energy all the time, at this time, the input does not provide electric energy, the output consumes electric energy all the time, so the energy is exhausted quickly, and the 15V drops rapidly), the output 15V dropping speed of the switching power supply is far greater than the bus voltage dropping speed, so that the inverter U1 is powered by the divided voltage of the buses, the inverter U1 can continue working, the input end of the inverter is at a low level, the output end of the inverter is at a high level, the MOS transistor Q1 is switched on, the discharge circuit is switched on, and the buses are discharged.
The present embodiment also provides a driving board including a discharge circuit having any of the features described above.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A discharge circuit, comprising:
the inverting module is used for converting a first level voltage input from an input end into a second level voltage and outputting the second level voltage from an output end;
the switching tube is connected with the output end of the phase inversion module and used for being switched on or switched off according to the second level voltage;
and the discharging module is connected with the switching tube in series and used for discharging the object to be discharged under the condition that the switching tube is conducted.
2. The discharge circuit of claim 1, further comprising:
and the power supply module is connected with the power end of the phase reversal module and used for providing a working power supply for the phase reversal module.
3. The discharge circuit of claim 2, wherein the power supply module comprises a first voltage divider resistor,
A second voltage-dividing resistor and a filter capacitor; wherein,
the input end of the first voltage-dividing resistor is connected with the object to be discharged, and the output end of the first voltage-dividing resistor is connected with the power supply end of the inverting module;
the input end of the second voltage-dividing resistor is connected with the output end of the first voltage-dividing resistor, and the output end of the second voltage-dividing resistor is grounded;
the filter capacitor is connected in parallel with the second voltage-dividing resistor.
4. The discharge circuit of claim 1, wherein the inverting module comprises an inverter.
5. The discharge circuit of claim 4, wherein the preset threshold of the inverter is greater than the minimum value of the turn-on voltage of the Insulated Gate Bipolar Transistor (IGBT), and the preset threshold is the maximum value of the low level identified by the inverter.
6. The discharge circuit of claim 1, wherein the input of the inverting module is connected to an output of a switching power supply.
7. The discharge circuit of claim 1, wherein the switching tube comprises a MOS tube; wherein,
the grid of MOS pipe with the output of opposition module is connected, the drain electrode of MOS pipe with the output of discharge module is connected, the source electrode ground connection of MOS pipe.
8. The discharge circuit of claim 1, wherein the discharge module comprises a discharge resistor, wherein an input terminal of the discharge resistor is connected to the object to be discharged.
9. The discharge circuit according to any one of claims 1 to 8, wherein the object to be discharged includes at least one electrolytic capacitor connected in series with each other, and the discharge circuit is connected in parallel with the object to be discharged.
10. A driving board comprising the discharge circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710649285.5A CN107241015A (en) | 2017-07-31 | 2017-07-31 | Discharge circuit and drive board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710649285.5A CN107241015A (en) | 2017-07-31 | 2017-07-31 | Discharge circuit and drive board |
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| CN107241015A true CN107241015A (en) | 2017-10-10 |
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| CN201710649285.5A Pending CN107241015A (en) | 2017-07-31 | 2017-07-31 | Discharge circuit and drive board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108429441A (en) * | 2018-02-12 | 2018-08-21 | 宁波宇喆电子科技有限公司 | A kind of protection circuit of memory programming circuit |
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|---|---|---|---|---|
| CN203883692U (en) * | 2014-06-03 | 2014-10-15 | 深圳市创维群欣安防科技有限公司 | Power board and energy release circuit thereof |
| CN204190611U (en) * | 2014-09-05 | 2015-03-04 | 芯砺微(上海)电子科技有限公司 | A kind of energy-storage travelling wave tube power-off automatic discharge circuit |
| CN207039442U (en) * | 2017-07-31 | 2018-02-23 | 珠海格力电器股份有限公司 | Discharge circuit and drive board |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429441A (en) * | 2018-02-12 | 2018-08-21 | 宁波宇喆电子科技有限公司 | A kind of protection circuit of memory programming circuit |
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