CN219992587U - Engineering machinery power control system - Google Patents
Engineering machinery power control system Download PDFInfo
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- CN219992587U CN219992587U CN202321045513.5U CN202321045513U CN219992587U CN 219992587 U CN219992587 U CN 219992587U CN 202321045513 U CN202321045513 U CN 202321045513U CN 219992587 U CN219992587 U CN 219992587U
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- control unit
- power
- motor
- power control
- power supply
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- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 238000010276 construction Methods 0.000 claims description 12
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical group O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
Abstract
The utility model provides an engineering machinery power control system which comprises a power control unit and a whole vehicle control unit which are connected with each other, wherein the power control unit switches different working modes according to different load demands of the whole vehicle control unit; the total electric quantity setting of the power supply can be reduced, and the safety risk is reduced; the capacitor is matched with the power supply to realize peak clipping and valley filling of the power, so that the power supply can realize stable current output, the working environment of the power supply can be improved, and the service life of a battery can be prolonged; the weight and the volume of the power supply can be effectively reduced, and the system arrangement is convenient.
Description
Technical Field
The utility model relates to the technical field of electric engineering machinery, in particular to a power control system of engineering machinery.
Background
Conventional engineering machinery in the prior art, such as an excavator and the like, has great dependence on fuel oil in the working process, and can generate huge emission. With the electrified development of automobiles and engineering machinery, pure electric fuel replacement is a necessary trend in the future.
As shown in fig. 1-2, in the engineering machinery in the prior art, a plurality of hydraulic load systems are driven to operate by a hydraulic pump, and when the engineering machinery is in operation, each hydraulic system alternately operates, so that high load and low load alternately change.
Therefore, in order to meet the above power requirement, as shown in fig. 3, the prior art adopts a scheme of driving the hydraulic pump in parallel by using two motors, and maintaining the rotation speed of one motor to stabilize the pressure so as to meet the operation of each subsystem. In the running process of the system, the power of the motor is also passively generated, and the output power of the power supply changes along with the fluctuation of the load.
The scheme can realize the normal operation of the whole system, but because the power supply is required to meet the high-power output of the double motors, on one hand, the power supply end can generate larger current, and extra safety protection is required; on the other hand, it is required that the power supply can supply a large amount of electricity, thereby increasing the weight of the entire system.
Therefore, there is a need to provide a power control system for a construction machine, which solves the above-mentioned drawbacks and disadvantages of the prior art.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the utility model provides a power control system of engineering machinery.
The technical scheme provided by the utility model is as follows:
the utility model provides an engineering machine tool power control system, includes interconnect's power control unit and whole car control unit, its characterized in that: the power control unit switches different working modes according to different loads of the whole vehicle control unit;
the power control unit includes:
one end of the power supply is connected with the first motor and the second motor respectively;
one end of the capacitor is connected with the first motor and the second motor respectively;
the output ends of the first motor and the second motor are connected with the whole vehicle control unit;
and the converter is arranged between the power supply and the capacitor to control the charge amount of the power supply to the capacitor.
As a further preferred embodiment of the present utility model, the construction machine is an electric excavator.
As a further preferred embodiment of the present utility model, the other end of the power supply is connected to a charging system.
As a further preferred embodiment of the present utility model, the power source is a power type battery.
As a further preferred embodiment of the utility model, the capacitor is a super capacitor.
As a further preferred embodiment of the present utility model, the converter is a DCDC converter.
As a further preferable embodiment of the present utility model, the whole vehicle control unit includes a hydraulic pump and a load, one end of the hydraulic pump is connected to the first motor and the second motor, and the other end of the hydraulic pump is connected to the load.
As a further preferred embodiment of the present utility model, the load includes at least an arm hydraulic system, a bucket hydraulic system, a boom hydraulic system, a swing system, and a traveling system.
As a further preferable implementation mode of the utility model, when the whole vehicle control unit runs at high load, the first motor and the second motor jointly output power to drive the whole vehicle control unit, and the converter does not work.
As a further preferred embodiment of the present utility model, when the vehicle control unit operates at low load, the first motor alone outputs power to drive the vehicle control unit, and the converter operates.
Compared with the prior art, the utility model has the following beneficial effects:
1) The utility model provides a power control system of engineering machinery, which is characterized in that a single motor works under low load, and a charging system is arranged to supply power to a power supply, so that the total electric quantity setting of the power supply can be reduced, and the safety risk is reduced.
2) The utility model provides an engineering machinery power control system, which realizes peak clipping and valley filling on power by adopting a capacitor to be matched with the power supply, so that the power supply can realize stable current output, the working environment of the power supply can be improved, and the service life of a battery can be prolonged.
3) The utility model provides a power control system of engineering machinery, which can effectively reduce the weight and the volume of a power supply and is convenient for system arrangement.
Drawings
FIG. 1 is a schematic diagram of the working time of each circulating element of a construction machine according to the prior art.
Fig. 2 is a schematic diagram showing a change of power output from a power supply of a construction machine with time according to the prior art.
Fig. 3 is a schematic diagram of a power control system according to the prior art.
Fig. 4 is a schematic structural diagram of a power control system according to a first embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
First embodiment
Fig. 4 shows a power control system for an engineering machine according to a first embodiment of the present utility model, which includes a power control unit and a whole vehicle control unit that are connected to each other.
In this embodiment, the power control unit includes a power source, a capacitor, a motor, and a converter.
One end of the power supply is connected with the first motor and the second motor respectively; preferably, in this embodiment, the power source is a power type battery, so as to meet the power requirements of different working conditions of the engineering machinery. As shown in fig. 4, in this embodiment, the other end of the power supply is connected to the charging system to charge the power supply when necessary, so that the total power setting of the power supply can be reduced, and the safety risk is reduced.
One end of the capacitor is connected with the first motor and the second motor respectively; in this embodiment, the capacitor is a super capacitor, such as an electric double layer capacitor, which is common in the art. The capacitor is matched with the power supply to realize peak clipping and valley filling of the power, so that the power supply can realize stable current output, the working environment of the power supply can be improved, and the service life of a battery can be prolonged.
In this embodiment, the motor includes a first motor and a second motor, and output ends of the first motor and the second motor are connected to a whole vehicle control unit; the first motor and the second motor in this embodiment are preferably motors with rated output power in the range of 300-400 kW.
The converter is arranged between the power supply and the capacitor to control the charge amount of the power supply to the capacitor. In this embodiment, the converter selects a DCDC converter, and controls the charging of the capacitor by the power supply through the DCDC converter, when the system is in low load operation, the DCDC converter charges the capacitor to a maximum value, and when the system is in high load operation, the capacitor outputs power to the whole vehicle control unit through the second motor 2 to realize discharging.
The engineering machinery in the embodiment is an electric excavator, and a person skilled in the art can apply the power control system provided by the scheme to other types of engineering machinery according to the requirements of actual working environments.
Correspondingly, in this embodiment, the whole vehicle control unit includes a hydraulic pump and a load, one end of the hydraulic pump is connected to the first motor and the second motor, and the other end of the hydraulic pump is connected to the load; as shown in fig. 4, the load in the present embodiment includes at least a boom hydraulic system, a bucket hydraulic system, a boom hydraulic system, a swing system, and a traveling system.
The outstanding contribution of this embodiment compared to the prior art is: the power control unit switches different working modes according to different loads of the whole vehicle control unit: i.e.
When the whole vehicle control unit runs under high load, the first motor and the second motor jointly output power to drive the whole vehicle control unit, the converter does not work, and at the moment, the energy of the capacitor is used for power output as much as possible.
When the whole vehicle control unit runs under low load, the first motor independently outputs power to drive the whole vehicle control unit, the converter works, and at the moment, the converter charges the capacitor according to the difference value between the outputtable current and the actual current of the power supply.
The specific working process comprises the following steps:
s1: the power control unit receives control quality sent by the whole vehicle control unit so as to predict the current load intensity of the whole vehicle control unit;
s2: when the load is large, the first motor and the second motor are controlled to jointly output power to drive the hydraulic pump, the converter does not work at the moment, and the power output is realized by using the electric quantity of the capacitor as much as possible;
when the load is small, the second motor stops outputting power, the first motor drives the hydraulic pump independently, and the converter charges the capacitor according to the difference between the output current of the power supply and the actual current.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides an engineering machine tool power control system, includes interconnect's power control unit and whole car control unit, its characterized in that: the power control unit switches different working modes according to different loads of the whole vehicle control unit;
the power control unit includes:
one end of the power supply is connected with the first motor and the second motor respectively;
one end of the capacitor is connected with the first motor and the second motor respectively;
the output ends of the first motor and the second motor are connected with the whole vehicle control unit;
and the converter is arranged between the power supply and the capacitor to control the charge amount of the power supply to the capacitor.
2. A power control system for a construction machine according to claim 1, wherein: the engineering machinery is an electric excavator.
3. A power control system for a construction machine according to claim 1, wherein: the other end of the power supply is connected with a charging system.
4. A power control system for a construction machine according to claim 1, wherein: the power supply is a power type battery.
5. A power control system for a construction machine according to claim 1, wherein: the capacitor is a super capacitor.
6. A power control system for a construction machine according to claim 1, wherein: the converter is a DCDC converter.
7. A power control system for a construction machine according to claim 1, wherein: the whole vehicle control unit comprises a hydraulic pump and a load, one end of the hydraulic pump is connected with the first motor and the second motor, and the other end of the hydraulic pump is connected with the load.
8. The work machine power control system of claim 7, wherein: the load at least comprises a bucket rod hydraulic system, a bucket hydraulic system, a movable arm hydraulic system, a rotary system and a traveling system.
9. A power control system for a construction machine according to claim 1, wherein: when the whole vehicle control unit runs at high load, the first motor and the second motor jointly output power to drive the whole vehicle control unit, and the converter does not work.
10. A power control system for a construction machine according to claim 1, wherein: when the whole vehicle control unit runs under low load, the first motor independently outputs power to drive the whole vehicle control unit, and the converter works.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321045513.5U CN219992587U (en) | 2023-05-05 | 2023-05-05 | Engineering machinery power control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321045513.5U CN219992587U (en) | 2023-05-05 | 2023-05-05 | Engineering machinery power control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219992587U true CN219992587U (en) | 2023-11-10 |
Family
ID=88621103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321045513.5U Active CN219992587U (en) | 2023-05-05 | 2023-05-05 | Engineering machinery power control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219992587U (en) |
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2023
- 2023-05-05 CN CN202321045513.5U patent/CN219992587U/en active Active
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