CN218102588U - Common direct current bus power supply system for crane and crane - Google Patents
Common direct current bus power supply system for crane and crane Download PDFInfo
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- CN218102588U CN218102588U CN202222449312.3U CN202222449312U CN218102588U CN 218102588 U CN218102588 U CN 218102588U CN 202222449312 U CN202222449312 U CN 202222449312U CN 218102588 U CN218102588 U CN 218102588U
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Abstract
The embodiment of the utility model provides a relate to the engineering machine tool field, specifically relate to a be used for the hoist to be total to direct current bus power supply system and contain this total to direct current bus power supply system's hoist, it can save all resistance cabinets on the tower machine, promotes the platform space and uses the travelling comfort. The system comprises: a direct current bus; the filtering and rectifying module is used for receiving and rectifying alternating current of a power grid and feeding direct current obtained by rectification into the direct current bus; and the inverter is used for receiving the direct current from the direct current bus, converting the direct current into alternating current and supplying the alternating current to an actuating mechanism of the crane.
Description
Technical Field
The utility model relates to an engineering machine tool field specifically relates to a be used for dc bus power supply system altogether of hoist and contain this hoist that is dc bus power supply system altogether.
Background
The tower crane is the main instrument that large-scale goods and materials were transported in the building site construction, and it adopts high-power converter driving motor more. Conventional converter need adopt the resistance cabinet, and this resistance cabinet can occupy tower machine platform space more, and after long-time high-power work, the resistance can generate heat, have the risk of scalding one's hand. In addition, for power grid fluctuation, the existing power supply system has no self-regulation capability, and energy feedback is difficult to realize.
SUMMERY OF THE UTILITY MODEL
In order to solve one or more among the problem that the background art mentioned, the utility model provides an aim at provides a be used for the hoist to share direct current bus power supply system and contain this hoist that shares direct current bus power supply system, it can save all resistance cabinets on the tower machine, promotes platform space and use travelling comfort.
In order to achieve the above object, an embodiment of the present invention provides a common dc bus power supply system for a crane, including: a direct current bus; the filtering and rectifying module is used for receiving and rectifying alternating current of a power grid and feeding direct current obtained through rectification into the direct current bus; and the inverter is used for receiving the direct current from the direct current bus, converting the direct current into alternating current and supplying the alternating current to an actuating mechanism of the crane.
Optionally, the filtering and rectifying module is an active filtering and rectifying module.
Optionally, the system further comprises: the phase-locked loop is used for detecting the amplitude, the phase and the frequency of the power grid; and a controller electrically connected to the phase locked loop and the active filter rectifier module for one or more of: according to the amplitude, the phase and the frequency of the power grid, full-time modulation is carried out on the IGBT in the active filter rectification module, and the voltage of the direct-current bus is ensured to be constant; and controlling the common direct current bus power supply system to be in an energy feedback working mode, wherein in the working mode, the actuating mechanism can generate current, the current is converted into direct current through the inverter and then fed into the direct current bus, and the active filtering rectification module modulates the direct current of the direct current bus into alternating current with the same phase and amplitude as the power grid and feeds the alternating current into the power grid.
Optionally, the system includes: and the four-quadrant electric energy meter is arranged between the filtering rectification module and the power grid.
Optionally, the actuator includes one or more of: hoisting mechanism, luffing mechanism, rotation mechanism and walking chassis mechanism.
Optionally, the inverter includes a first inverter, a second inverter, a third inverter, and a fourth inverter, which are respectively used for the hoisting mechanism, the luffing mechanism, the slewing mechanism, and the traveling chassis mechanism.
Optionally, the filtering and rectifying module includes a first filtering and rectifying module for lifting and amplitude variation and a second filtering and rectifying module for chassis and rotation, and the dc bus includes a first dc bus and a second dc bus, where the first filtering and rectifying module is connected to the first dc bus, and the first dc bus is connected to the first inverter and the second inverter; the second filtering and rectifying module is connected with a second direct current bus, and the second direct current bus is connected with the third inverter and the fourth inverter.
Correspondingly, the utility model also provides a hoist, this hoist contain the aforesaid and are direct current bus power supply system altogether.
Optionally, the crane is a tower crane, a crawler crane, a track type tower crane or a crawler type tower crane.
Through the technical scheme, the power supply of the electric equipment on the crane is realized by adopting the direct-current bus, the filtering and rectifying module and the inverter, so that a resistor cabinet in the prior art can be avoided, and the space of the platform can be improved and the use comfort can be improved.
Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a common dc bus power supply system for a crane according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a common dc bus power supply system for a crane according to an embodiment of the present invention; and
fig. 3 is a schematic structural diagram of a common dc bus power supply system for a crane according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a schematic structural diagram of a common dc bus power supply system for a crane according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a common dc bus power supply system for a crane, which includes: a direct current bus; the filtering and rectifying module is connected with the direct current bus and used for receiving and rectifying alternating current of a power grid and feeding direct current obtained through rectification into the direct current bus; and an inverter connected to the dc bus for receiving dc power from the dc bus, converting it into ac power, and supplying the ac power to an actuator of the crane, which may be, for example, one or more of: the lifting mechanism, the luffing mechanism, the swing mechanism and the walking chassis mechanism can also be used as an executing mechanism required by tower cranes such as an independent or non-independent auxiliary hook, a jacking pump station motor and the like. The power supply of the electric equipment on the crane is realized by adopting the direct current bus, the filtering and rectifying module and the inverter, so that a resistor cabinet in the prior art can be avoided, and the space of the platform and the use comfort can be improved.
Optionally, the filtering and rectifying module is an active filtering and rectifying module. The amplitude, the phase and the frequency of a power grid can be detected in real time by adopting a phase-locked loop, and the constant voltage of a direct current bus can be ensured by modulating the IGBT in the active filter rectification module in full time according to the amplitude, the phase and the frequency.
Fig. 2 is a schematic structural diagram of a common dc bus power supply system for a crane according to an embodiment of the present invention. As shown in fig. 2, in addition to the structure shown in fig. 1, the common dc bus power supply system provided in fig. 2 further includes: the phase-locked loop is used for detecting the amplitude, the phase and the frequency of the power grid; and a controller electrically connected to the phase locked loop and the active filter rectifier module for one or more of: according to the amplitude, the phase and the frequency of the power grid, full-time modulation is carried out on the IGBT in the active filter rectification module, and the voltage of the direct-current bus is ensured to be constant; and the active filter rectification module is used for modulating the direct current of the direct current bus into alternating current with the same phase and amplitude as the power grid and feeding the alternating current into the power grid.
Specifically, the controller can control the IGBT in the active filter rectification module according to the amplitude, the phase and the frequency of the power grid detected by the phase-locked loop, so that the IGBT is switched on and off according to a certain rule to complete inversion, the inversion principle is similar to that of a driving motor, the direct-current bus voltage is inverted into alternating current with the same phase and amplitude as the power grid, and energy feedback is completed. The process can feed back the electric energy generated by the crane in the using process to the power grid, thereby realizing energy conservation and environmental protection.
Fig. 3 is a schematic structural diagram of a common dc bus power supply system for a crane according to an embodiment of the present invention. As shown in fig. 3, the common dc bus power supply system includes: the device comprises a first filtering and rectifying module for lifting and amplitude variation, a second filtering and rectifying module for chassis and rotation, a first direct current bus, a second direct current bus, a first inverter, a second inverter, a third inverter and a fourth inverter which are respectively used for a lifting mechanism, an amplitude variation mechanism, a rotation mechanism and a walking chassis mechanism. The first filtering and rectifying module is connected with a first direct current bus, and the first direct current bus is connected with the first inverter and the second inverter; the second filtering and rectifying module is connected with a second direct current bus, and the second direct current bus is connected with the third inverter and the fourth inverter. Of course, the common dc bus power supply system may further include a phase locked loop, a controller, etc. as described in fig. 2 to ensure constant dc bus voltage and/or achieve energy feedback.
Fig. 3 also shows two four-quadrant electric energy meters respectively installed between the first filtering and rectifying module and the power grid and between the second filtering and rectifying module and the power grid. The four-quadrant electric energy meter can measure positive active electric energy (i.e., electric energy used by a user) and negative active electric energy (i.e., electric energy fed back by energy). This makes it possible to measure what the specific energy fed back to the grid by the actuator is.
The specific structure of the common dc bus power supply system for crane provided by an embodiment of the present invention is only given by fig. 3, which plans the number of components (e.g., dc bus, filter rectifier module, inverter) in the common dc bus power supply system and which actuators corresponding to which components correspond according to the situation of the actuators of the crane. Of course, this is merely an example, and the present invention is not limited thereto, and other possible arrangements are possible.
Correspondingly, the utility model also provides a hoist, this hoist contain the aforesaid and are direct current bus power supply system altogether. The crane may be a tower crane (also known as a tower crane), a crawler crane, a track-mounted tower crane (i.e., a tower crane traveling on a track) or a crawler-mounted tower crane, which is a novel large-scale engineering equipment comprising a walkable crawler chassis and a tower crane above the chassis.
Overall, the utility model provides a scheme can have following advantage:
1) All resistor cabinets on the crane can be omitted, and the space of the platform and the use comfort are improved;
2) The voltage of the direct current bus can be ensured to be constant by adopting the active filter rectification module; and
3) The energy generated by the crane in the using process can be converted into electric energy to be fed back to a power grid, so that energy conservation and environmental protection are realized.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the present invention within the technical concept of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships that are known based on the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (9)
1. A common dc bus power supply system for a crane, the system comprising:
a direct current bus;
the filtering and rectifying module is used for receiving and rectifying alternating current of a power grid and feeding direct current obtained by rectification into the direct current bus; and
and the inverter is used for receiving the direct current from the direct current bus, converting the direct current into alternating current and supplying the alternating current to an actuating mechanism of the crane.
2. A common dc bus power supply system as defined in claim 1, wherein the smoothing and rectifying module is an active smoothing and rectifying module.
3. A common dc bus power supply system as defined in claim 2, further comprising:
the phase-locked loop is used for detecting the amplitude, the phase and the frequency of the power grid; and
a controller electrically connected to the phase locked loop and the active filter rectifier module for one or more of:
according to the amplitude, the phase and the frequency of the power grid, carrying out full-time modulation on the IGBT in the active filter rectification module to ensure that the voltage of the direct current bus is constant; and
and controlling the common direct current bus power supply system to be in an energy feedback working mode, wherein in the working mode, the actuating mechanism can generate current, the current is converted into direct current through the inverter and then fed into the direct current bus, and the active filtering rectification module modulates the direct current of the direct current bus into alternating current with the same phase and amplitude as the power grid and feeds the alternating current into the power grid.
4. A common dc bus power supply system according to any of claims 1-3, characterized in that it comprises:
and the four-quadrant electric energy meter is arranged between the filtering rectification module and the power grid.
5. A common dc bus power supply system according to any of claims 1-3, wherein the actuator comprises one or more of: hoisting mechanism, luffing mechanism, rotation mechanism and walking chassis mechanism.
6. A common DC bus power supply system according to claim 5,
the inverter comprises a first inverter, a second inverter, a third inverter and a fourth inverter which are respectively used for the hoisting mechanism, the amplitude varying mechanism, the slewing mechanism and the walking chassis mechanism.
7. A common DC bus power supply system according to claim 6,
the filtering and rectifying module comprises a first filtering and rectifying module for lifting and amplitude variation and a second filtering and rectifying module for chassis and revolution,
the direct current bus comprises a first direct current bus and a second direct current bus,
the first filtering and rectifying module is connected with a first direct current bus, and the first direct current bus is connected with the first inverter and the second inverter; the second filtering and rectifying module is connected with a second direct current bus, and the second direct current bus is connected with the third inverter and the fourth inverter.
8. Crane, characterized in that it comprises a common dc bus supply system according to any of claims 1-7.
9. A crane according to claim 8, characterized in that the crane is a tower crane, a crawler crane or a crawler crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222449312.3U CN218102588U (en) | 2022-09-15 | 2022-09-15 | Common direct current bus power supply system for crane and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222449312.3U CN218102588U (en) | 2022-09-15 | 2022-09-15 | Common direct current bus power supply system for crane and crane |
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| Publication Number | Publication Date |
|---|---|
| CN218102588U true CN218102588U (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222449312.3U Active CN218102588U (en) | 2022-09-15 | 2022-09-15 | Common direct current bus power supply system for crane and crane |
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| CN (1) | CN218102588U (en) |
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