CN211018274U - Frequency converter power distribution system based on public direct current bus - Google Patents
Frequency converter power distribution system based on public direct current bus Download PDFInfo
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- CN211018274U CN211018274U CN201921950795.7U CN201921950795U CN211018274U CN 211018274 U CN211018274 U CN 211018274U CN 201921950795 U CN201921950795 U CN 201921950795U CN 211018274 U CN211018274 U CN 211018274U
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- direct current
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- control device
- current bus
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Abstract
The utility model relates to a frequency converter power distribution system based on public direct current generating line, including multiunit contravariant controlling means, contravariant dispensing device and load motor, still include public direct current generating line system, contravariant regeneration controlling means and total control unit, public direct current generating line system includes public fairing, public direct current generating line controlling means and public direct current generating line, and public direct current generating line is connected with public direct current generating line controlling means and contravariant regeneration controlling means; the master control unit is respectively connected with the public direct current bus control device, the inversion regeneration control device and the inversion control device. The advantages are that: the power distribution system with the frequency conversion driving modularization function is formed by controlling a public direct current bus, an inversion open circuit distribution system, a direct current control system, an inversion control system, a regeneration control device and a master control unit, the multiple inversion control devices can be conveniently configured on load motors needing to be driven, the regeneration device is used for controlling power generation and feedback to a power grid, and high efficiency and energy conservation are achieved.
Description
Technical Field
The utility model belongs to an electrical drive and automated control field, more specifically the utility model relates to a converter distribution system based on public DC bus.
Background
At present, a frequency converter system in mining and mineral processing technology production basically adopts two units of rectification and inversion, and one set of frequency converter is driven by corresponding to one motor. Each frequency converter is independently connected to a three-phase main power supply system, namely, a set of mineral processing or mining equipment simultaneously uses a plurality of frequency converters, but each frequency converter and a system formed by the motors are independent. Although this system is simple, in a multi-motor drive system, one inverter cannot be implemented to drive one motor device due to space limitations and the like; in addition, when some processes require simultaneous driving of synchronous equipment and batch equipment, conventional variable frequency driving is limited.
Disclosure of Invention
The utility model aims at providing a "distribution system" with frequency conversion driven modularization function can reach energy-efficient converter distribution system based on public DC bus through regenerating unit control "electricity generation" repayment electric wire netting.
The utility model relates to a frequency converter power distribution system of a public direct current bus, which comprises a plurality of groups of inversion control devices, inversion distribution devices and load motors, and is characterized by also comprising a public direct current bus system, an inversion regeneration control device and a master control unit,
the common direct current bus system comprises a common rectifying device, a common direct current bus control device and a common direct current bus,
the public rectifying device is connected to a three-phase alternating current input end, DC & lt + & gt and DC & lt- & gt of the public rectifying device are connected to a public direct current bus, three-phase alternating current is converted into a direct current power supply, an input direct current power supply is provided for a 1-N inversion control device converged on the public direct current bus, the inversion control device is connected with an inversion distribution device, and an alternating current power supply output by inversion of the inversion control device is suitable for 1-N load motors;
the public direct current bus is also connected with a public direct current bus control device and an inversion regeneration control device;
the master control unit is respectively connected with the public direct current bus control device, the inversion regeneration control device and the inversion control device.
Preferably, when the load motor is in a power generation state, the inversion regeneration control device converts the redundant energy into alternating current to feed back to the power grid, and the inversion regeneration control device is connected with the master control unit and exchanges data with the master control unit to realize the overall control of the master control unit.
Preferably, the master control unit is a control core of the whole system, and establishes communication with the common rectification control device system, the plurality of inversion control devices and the inversion regeneration control device through RS-485 to control and coordinate stable operation of the system in real time.
Compared with the prior art, the utility model, its advantage is:
the utility model discloses a public DC bus of combination formula and contravariant "open a way" system of joining in marriage with adjustable, assist with DC control, inverter control, regeneration control device, total control unit overall control, form "distribution system" that has frequency conversion driven modular function, can be convenient make many inverter control device dispose to each required driven load motor on, accomplish the system of joining in marriage of "open a way" each "monomer converter" of formula, and through regeneration arrangement control "electricity generation" repayment electric wire netting, reach high-efficient energy-saving, be a novel mode and the trend of concentrating frequency conversion control.
Drawings
Fig. 1 is a block diagram of the system architecture of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, the utility model relates to a frequency converter power distribution system of a common direct current bus, which comprises a plurality of groups of inversion control devices, inversion distribution devices and load motors, and is characterized in that the utility model also comprises a common direct current bus system, an inversion regeneration control device and a master control unit,
the common direct current bus system comprises a common rectifying device, a common direct current bus control device and a common direct current bus,
the public rectifying device is connected to a three-phase alternating current input end, DC & lt + & gt and DC & lt- & gt of the public rectifying device are connected to a public direct current bus, three-phase alternating current is converted into a direct current power supply, an input direct current power supply is provided for a 1-N inversion control device converged on the public direct current bus, the inversion control device is connected with an inversion distribution device, and an alternating current power supply output by inversion of the inversion control device is suitable for 1-N load motors;
the public direct current bus is also connected with a public direct current bus control device and an inversion regeneration control device; when the load motor is in a power generation state, the inversion regeneration control device converts redundant energy into alternating current to feed back to the power grid, so that the voltage stability of a public direct current bus is guaranteed, and energy is effectively saved. The inversion regeneration control device is connected with the master control unit, and exchanges data with each other to realize the overall control of the master control unit.
The master control unit is respectively connected with the public direct current bus control device, the inversion regeneration control device and the inversion control device. The master control unit is a control core of the whole system, establishes communication with the public rectification control device system, the plurality of inversion control devices and the inversion regeneration control device through RS-485, and controls and coordinates stable operation of the system in real time. The whole system is enabled to work in a coordinated and ordered way.
The utility model discloses the quantity of control motor load and the DC power supply capacity phase-match that public DC bus provided, contravariant controlling means can convey 1-N contravariant system controlling means information "the control unit" through the communication like this in, in time carry out data interchange to accomplish the optimal control of adjustment system totality according to the instruction. The utility model discloses a control unit adopts the control unit of model.
Claims (3)
1. A frequency converter power distribution system based on a common direct current bus comprises a plurality of groups of inversion control devices, inversion distribution devices and load motors, and is characterized by also comprising a common direct current bus system, an inversion regeneration control device and a master control unit,
the common direct current bus system comprises a common rectifying device, a common direct current bus control device and a common direct current bus,
the public rectifying device is connected to a three-phase alternating current input end, DC & lt + & gt and DC & lt- & gt of the public rectifying device are connected to a public direct current bus, three-phase alternating current is converted into a direct current power supply, an input direct current power supply is provided for a 1-N inversion control device converged on the public direct current bus, the inversion control device is connected with an inversion distribution device, and an alternating current power supply output by inversion of the inversion control device is suitable for 1-N load motors;
the public direct current bus is also connected with a public direct current bus control device and an inversion regeneration control device;
the master control unit is respectively connected with the public direct current bus control device, the inversion regeneration control device and the inversion control device.
2. The frequency converter power distribution system based on the common direct current bus as claimed in claim 1, wherein the inversion regeneration control device converts the excess energy into alternating current to feed back to the power grid when the load motor is in a power generation state, and the inversion regeneration control device is connected with the master control unit to exchange data with each other, thereby realizing the overall control of the master control unit.
3. The frequency converter power distribution system based on the common direct current bus of claim 1, wherein the master control unit is a control core of the whole system, and establishes communication with the common rectification control device system, the plurality of inversion control devices and the inversion regeneration control device through RS-485 to control and coordinate stable operation of the system in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921950795.7U CN211018274U (en) | 2019-11-13 | 2019-11-13 | Frequency converter power distribution system based on public direct current bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921950795.7U CN211018274U (en) | 2019-11-13 | 2019-11-13 | Frequency converter power distribution system based on public direct current bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211018274U true CN211018274U (en) | 2020-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921950795.7U Active CN211018274U (en) | 2019-11-13 | 2019-11-13 | Frequency converter power distribution system based on public direct current bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211018274U (en) |
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2019
- 2019-11-13 CN CN201921950795.7U patent/CN211018274U/en active Active
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