CN215733537U - Super capacitor charging and discharging circuit for anti-interference electricity of frequency converter - Google Patents
Super capacitor charging and discharging circuit for anti-interference electricity of frequency converter Download PDFInfo
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- CN215733537U CN215733537U CN202121288741.6U CN202121288741U CN215733537U CN 215733537 U CN215733537 U CN 215733537U CN 202121288741 U CN202121288741 U CN 202121288741U CN 215733537 U CN215733537 U CN 215733537U
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- 239000003990 capacitor Substances 0.000 title claims abstract description 39
- 238000007599 discharging Methods 0.000 title claims abstract description 25
- 230000005611 electricity Effects 0.000 title claims description 11
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010924 continuous production Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a super capacitor charging and discharging circuit for preventing interference of a frequency converter, and belongs to the technical field of interference of the frequency converter. The circuit includes: the charging and discharging circuit comprises a charging and discharging circuit, a controller, a super capacitor, a fuse and a circuit breaker. The charge and discharge circuit includes: direct current switch, charging current limiting resistance, IGBT and diode. One end of the charging and discharging circuit is connected with the positive pole of the direct current bus of the frequency converter, and the other end of the charging and discharging circuit is connected with the fuse. The positive pole of super capacitor connects the fuse, and the negative pole connects converter direct current bus negative pole. And one end of the fuse is connected with the charging and discharging circuit, and the other end of the fuse is connected with the positive electrode of the super capacitor. The controller signal acquisition line is respectively connected with the input end and the output end of the charge-discharge circuit, and the control signal line is connected with the charge-discharge circuit. The utility model reduces the charge-discharge complexity, saves the cost and improves the stability of the system.
Description
Technical Field
The utility model relates to the technical field of anti-interference electricity of frequency converters, in particular to an anti-interference electricity super capacitor charging and discharging circuit of a frequency converter.
Background
In the operation process of an electric power system, due to the fact that faults such as lightning strike, instantaneous short circuit and the like are applied to an external circuit to cause short circuit faults of adjacent circuits of an internal power grid of an enterprise, starting of a large motor and the like, voltage can be recovered after instantaneous large amplitude fluctuation, and the phenomenon is generally called 'electricity interference'. Due to the fact that modern enterprises are large in scale, the electricity shaking duration time is short, but the influence on production is huge. The instantaneous voltage fluctuations will cause a large number of motors to trip and the equipment to shut down. After the voltage of the power grid is recovered, the motor can not automatically recover to operate, so that the continuous production process is disordered, and production and equipment accidents can be caused. For large devices, if recovery is performed manually, it takes longer, whereas for some unattended devices, recovery takes longer. For continuous production devices of petroleum, chemical industry and the like, a series of losses such as safety, environmental protection, waste products, raw material waste, yield reduction, low benefit and the like are very huge. At present, the anti-interference electricity device for the frequency converter mainly comprises: firstly, a control loop is modified to avoid a shaking point, so that a frequency converter is not powered down; and the other mode is a mode of adding a direct current backup power supply to the DC-LINK, such as a storage battery or a super capacitor. The method is widely researched for charging modes of the super capacitor, most of the super capacitor is charged by a charger, and the method is high in cost, poor in stability and complex in control.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the conventional super capacitor charging circuit and provides a super capacitor charging and discharging circuit for preventing electricity interference of a frequency converter.
The technical scheme of the utility model is as follows:
a super capacitor charge-discharge circuit for anti-interference electricity of a frequency converter comprises: a charge and discharge circuit, a controller and a super capacitor; the charge and discharge circuit includes: the direct current switch is connected with the charging current-limiting resistor at one end, the other end of the direct current switch is connected with the anode of a direct current bus of the frequency converter, one end of the charging current-limiting resistor is connected with the direct current switch, the other end of the charging current-limiting resistor is connected with the anode of the super capacitor, the emitter of the IGBT is connected with the anode of the direct current bus, the collector of the IGBT is connected with the cathode of the diode, and the anode of the diode is connected with the anode of the super capacitor; the positive electrode of the super capacitor is connected with the charging and discharging circuit, and the negative electrode of the super capacitor is connected with the negative electrode of the direct-current bus of the frequency converter; the controller signal acquisition line is respectively connected with the input end and the output end of the charge-discharge circuit, and the control signal line is connected with the charge-discharge circuit.
Further, the controller includes: CPU, A/D circuit, current and voltage acquisition circuit, IGBT drive circuit, I/O port, display screen.
Further, a fuse is arranged between the super capacitor and the charging and discharging circuit.
Further, a circuit breaker is arranged between the super capacitor charging and discharging circuit and the frequency converter.
The circuit structure is simple, the charging and discharging complexity is greatly reduced, the cost is saved, and the stability of the system is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of the present invention integrally connected to a frequency converter;
fig. 2 is a schematic diagram of a charging and discharging circuit in an embodiment of the present invention.
Detailed Description
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 some, not all, embodiments of the present invention. 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.
Fig. 1 is a schematic diagram of an embodiment of a super capacitor charging and discharging circuit for anti-interference of a frequency converter according to the utility model. The circuit includes: the charging and discharging circuit comprises a charging and discharging circuit, a controller, a super capacitor C1, a fuse FU1 and a breaker QF 1. And one end of the charging and discharging circuit is connected with the positive electrode of the direct-current bus of the frequency converter, and the other end of the charging and discharging circuit is connected with the fuse FU 1. The positive pole of super capacitor C1 connects fuse FU1, and the negative pole is connected the converter direct current bus negative pole. And one end of the fuse FU1 is connected with the charging and discharging circuit, and the other end of the fuse FU1 is connected with the anode of the super capacitor C1. The controller signal acquisition line is respectively connected with the input end and the output end of the charge-discharge circuit, and the control signal line is connected with the charge-discharge circuit.
The charge and discharge circuit includes: the direct current switch S1, the charging current-limiting resistor R1, the IGBT Q1 and the diode D1, wherein one end of the direct current switch S1 is connected with the charging current-limiting resistor R1, the other end of the direct current switch S1 is connected with the anode of a direct current bus of the frequency converter, one end of the charging current-limiting resistor R1 is connected with the direct current switch S1, the other end of the charging current-limiting resistor R1 is connected with the anode C1 of the super capacitor, the emitter of the IGBT Q1 is connected with the anode of the direct current bus, the collector of the IGBT Q1 is connected with the cathode of the diode D1, and the anode of the diode D1 is connected with the anode of the super capacitor C1.
When specifically using, utility model and converter direct current bus are connected to together. The frequency converter is started, the direct-current bus voltage is established, the controller controls the direct-current switch S1 to be closed, and the direct-current bus voltage automatically charges the super capacitor C1 through the charging and discharging circuit. The power and the resistance value of the charging current-limiting resistor R1 need to be selected according to the output current allowed by the frequency converter bus and the capacity of the super capacitor C1, and the charging current is not more than 5% of the rated current of the direct-current bus of the frequency converter.
After the super capacitor C1 is fully charged, the direct current switch S1 and the charging current-limiting resistor R1 are not disconnected, so that energy is supplemented to the super capacitor C1 due to the loss of the super capacitor C1 and the bus fluctuation of the frequency converter. The controller closes the IGBT Q1, the super capacitor C1 is directly connected with the frequency converter bus through the IGBT Q1 and the diode D1, if electricity interference occurs or the voltage of the frequency converter bus drops, the energy of the super capacitor C1 automatically charges the frequency converter bus through the IGBT Q1 and the diode D1, and the support bus is stable; the controller collects the current of a charging and discharging line and the direct-current bus voltage of the frequency converter, and if the bus voltage or the loop current exceeds a preset value, the controller controls a direct-current switch S1 and an IGBT Q1 of the charging and discharging loop to protect the circuit.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A super capacitor charge-discharge circuit for anti-interference electricity of a frequency converter is characterized by comprising: a charge and discharge circuit, a controller and a super capacitor;
the charge and discharge circuit includes: the direct current switch is connected with the charging current-limiting resistor at one end, the other end of the direct current switch is connected with the anode of a direct current bus of the frequency converter, one end of the charging current-limiting resistor is connected with the direct current switch, the other end of the charging current-limiting resistor is connected with the anode of the super capacitor, the emitting electrode of the IGBT is connected with the anode of the direct current bus, the collector electrode of the IGBT is connected with the cathode of the diode, and the anode of the diode is connected with the anode of the super capacitor;
the positive electrode of the super capacitor is connected with the charging and discharging circuit, and the negative electrode of the super capacitor is connected with the negative electrode of the direct-current bus of the frequency converter;
the controller signal acquisition line is respectively connected with the input end and the output end of the charge and discharge circuit, and the control signal line is connected with the charge and discharge circuit.
2. The supercapacitor charge-discharge circuit for anti-interference of frequency converters according to claim 1, wherein the controller comprises: CPU, A/D circuit, current and voltage acquisition circuit, IGBT drive circuit, I/O port, display screen.
3. The supercapacitor charge-discharge circuit for inverter anti-interference according to claim 1, wherein a fuse is arranged between the supercapacitor and the charge-discharge circuit.
4. The anti-interference supercapacitor charge and discharge circuit for the frequency converter according to claim 1, wherein a circuit breaker is arranged between the supercapacitor charge and discharge circuit and the frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121288741.6U CN215733537U (en) | 2021-06-09 | 2021-06-09 | Super capacitor charging and discharging circuit for anti-interference electricity of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121288741.6U CN215733537U (en) | 2021-06-09 | 2021-06-09 | Super capacitor charging and discharging circuit for anti-interference electricity of frequency converter |
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| Publication Number | Publication Date |
|---|---|
| CN215733537U true CN215733537U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121288741.6U Active CN215733537U (en) | 2021-06-09 | 2021-06-09 | Super capacitor charging and discharging circuit for anti-interference electricity of frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024082132A1 (en) * | 2022-10-18 | 2024-04-25 | Siemens Aktiengesellschaft | Discharge device for dc bus capacitor and method thereof, electrical device and storage medium |
-
2021
- 2021-06-09 CN CN202121288741.6U patent/CN215733537U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024082132A1 (en) * | 2022-10-18 | 2024-04-25 | Siemens Aktiengesellschaft | Discharge device for dc bus capacitor and method thereof, electrical device and storage medium |
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