CN215558787U - Semi-permanent magnet control system and engineering machinery - Google Patents
Semi-permanent magnet control system and engineering machinery Download PDFInfo
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- CN215558787U CN215558787U CN202122217870.2U CN202122217870U CN215558787U CN 215558787 U CN215558787 U CN 215558787U CN 202122217870 U CN202122217870 U CN 202122217870U CN 215558787 U CN215558787 U CN 215558787U
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Abstract
The utility model discloses a semi-permanent magnet control system and an engineering machine, comprising a traveling system, an oil pump system, an instrument and a storage battery, wherein the traveling system is connected with the oil pump system; the walking system comprises a walking controller, a direction handle connected with the walking controller, an accelerator and an alternating current asynchronous walking motor, and the alternating current asynchronous walking motor is controlled to do corresponding action through instructions input by the direction handle; the oil pump system comprises a pump controller, an operating handle and a permanent magnet synchronous motor, wherein the operating handle and the permanent magnet synchronous motor are connected with the pump controller; the walking controller and the pump controller are connected with the instrument to realize the monitoring of the running state of the semi-permanent magnet control system; the enabling ends of the walking controller, the pump controller and the instrument are connected with the anode of the storage battery through a system power-on switch, and the walking controller, the oil pump controller, the cathode end of the instrument and the cathode end of the accelerator are connected with the cathode of the storage battery. The utility model can improve the operation efficiency of the electric forklift and reduce the energy consumption.
Description
Technical Field
The utility model relates to the technical field of intelligent control of engineering machinery, in particular to a semi-permanent magnet control system for an electric forklift.
Background
At present, the electric forklift is widely applied to agricultural production and industrial construction all over the world and is one of indispensable special engineering machinery; the electric forklift has the advantages of narrow working site, short-distance loading and unloading, frequent starting and complex and variable motor rotating speed.
The traditional electric forklift controller system mostly adopts an alternating current asynchronous system, and is welcomed by various large forklift host factories due to the advantages of good reliability, high rotating speed performance and the like of an alternating current motor.
The permanent magnet synchronous motor has the advantages of high efficiency and energy saving, the permanent magnet is embedded on the rotor to establish a rotor magnetic field, the rotor and a stator magnetic field run synchronously during normal work, no induced current exists in the rotor, and no rotor resistance loss exists, so the permanent magnet synchronous motor has the advantages of high efficiency and energy saving, and has the trend of gradually replacing an alternating current asynchronous motor.
When the application of the permanent magnet synchronous motor on the forklift is dealt with, a host factory adopts the traditional control system scheme, namely, the walking motor and the oil pump motor both adopt the same permanent magnet synchronous motor. In practical application, the energy saving of the permanent magnet synchronous pump motor is about 15% lower than that of an alternating current asynchronous motor with the same power due to different working conditions, and the energy consumption of the permanent magnet synchronous walking motor is higher than that of the alternating current asynchronous motor by more than 20% under the same working conditions, mainly because the rotating speed of the motor is relatively constant in the working process of the pump, the motor is frequently started and stopped in the walking process, and the rotating speed is complex and variable.
Therefore, in practical application of the electric forklift, the electric forklift with the permanent magnet control system is not obviously promoted in the endurance time compared with an alternating current asynchronous system, and the phenomenon that the energy consumption is not reduced and increased can be caused sometimes.
SUMMERY OF THE UTILITY MODEL
According to the defects of the prior art, the utility model provides a semi-permanent magnet control system, namely, an alternating current asynchronous system is adopted as a walking system, a permanent magnet synchronous system is adopted as an oil pump system, and the energy is saved and the endurance time is improved by 10 percent compared with that of a common electric forklift under the same condition. Meanwhile, the utility model can improve the operation efficiency of the electric forklift and reduce the energy consumption.
The utility model is realized according to the following technical scheme:
the utility model discloses a semi-permanent magnet control system, which comprises:
the walking system comprises a walking controller, a direction handle connected with the walking controller, an accelerator and an alternating current asynchronous walking motor, and the alternating current asynchronous walking motor is controlled to do corresponding actions through instructions input by the direction handle;
the oil pump system comprises a pump controller, an operating handle and a permanent magnet synchronous motor, wherein the operating handle and the permanent magnet synchronous motor are connected with the pump controller;
the walking controller and the pump controller are connected with the instrument to monitor the running state of the semi-permanent magnet control system;
the walking controller, the oil pump controller, the instrument negative end and the accelerator negative end are connected with the negative electrode of the storage battery through the system power-on switch.
As an optimization scheme of the utility model: the walking system also comprises a walking motor temperature sensor; and the walking motor temperature sensor is connected with the walking controller and is used for monitoring the temperature of the alternating current asynchronous walking motor.
As an optimization scheme of the utility model: the walking system also comprises a walking motor speed encoder; and the walking motor speed encoder is connected with the walking controller and is used for feeding back the running rotating speed of the alternating-current asynchronous walking motor.
As an optimization scheme of the utility model: the walking system also comprises a hand brake; and the hand brake is connected with the walking controller to realize the parking function.
As an optimization scheme of the utility model: the walking system also comprises a main contactor; and the main contactor is connected with the walking controller and is used for controlling the on-off of a system loop.
As an optimization scheme of the utility model: the oil pump system further comprises a pump motor temperature sensor; the pump motor temperature sensor is connected with the pump controller and used for monitoring the motor temperature of the permanent magnet synchronous pump motor.
As an optimization scheme of the utility model: the oil pump system also comprises a pump motor rotary encoder; the pump motor rotary encoder is connected with a pump controller and used for feeding back the running rotating speed of the permanent magnet synchronous pump motor.
As an optimization scheme of the utility model: the direction handle is provided with forward and backward input instruction keys; the operating handle is provided with lifting, side shifting, inclining and accessory input command keys.
The utility model also discloses engineering machinery provided with the semi-permanent magnet control system.
The preferable scheme is as follows: the engineering machinery comprises an electric forklift.
The utility model has the beneficial effects that:
the semi-permanent magnet control system applied to the electric forklift, provided by the utility model, has the advantages that the walking system adopts an alternating current asynchronous system, the oil pump system adopts a permanent magnet synchronous system, the advantages of a permanent magnet synchronous motor are exerted to the maximum extent, the operation efficiency of the electric forklift is obviously improved, the energy consumption is reduced, and the endurance time of the electric forklift is increased by 10% compared with that of a common electric forklift under the same condition.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model, are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model without limiting the utility model to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
In the drawings:
FIG. 1 is an electrical schematic of a semi-permanent magnet control system of the present invention;
the attached drawings are as follows: the system comprises an accelerator 1, a directional handle 2, a hand brake 3, a system power-on switch 4, an instrument 5, an operating handle 6, a pump motor temperature sensor 7, a pump controller 8, a pump motor rotary encoder 9, a permanent magnet synchronous pump motor 10, a storage battery 11, an alternating current asynchronous walking motor 12, a walking motor temperature sensor 13, a walking motor speed encoder 14, a main contactor 15 and a walking controller 16.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In practical application, due to different working conditions, the energy saving of the motor of the permanent magnet synchronous pump is about 15% lower than that of an alternating current asynchronous motor with the same power, and the energy consumption of the permanent magnet synchronous walking motor is higher than that of the alternating current asynchronous motor by more than 20% under the same working condition, mainly because the rotating speed of the motor is relatively constant in the working process of the pump, the motor is frequently started and stopped in the walking process, and the rotating speed is complex and variable. The utility model provides a semi-permanent magnet control system aiming at the situation, namely, an alternating current asynchronous system is adopted by a walking system, a permanent magnet synchronous system is adopted by an oil pump system, the energy is saved more than that of a common electric forklift under the same condition, and the endurance time can be improved by 10%. The specific embodiment is as follows:
as shown in fig. 1, a semi-permanent magnet control system includes a traveling system and an oil pump system, wherein the traveling system employs an ac asynchronous system, and the oil pump system employs a permanent magnet synchronous system. The system comprises an accelerator 1, a direction handle 2, a hand brake 3, a system power-on switch 4, an instrument 5, an operating handle 6, a pump motor temperature sensor 7, a pump controller 8, a pump motor rotary encoder 9, a permanent magnet synchronous pump motor 10, a storage battery 11, an alternating current asynchronous walking motor 12, a walking motor temperature sensor 13, a walking motor speed encoder 14, a main contactor 15 and a walking controller 16.
Wherein, the walking controller 16, the pump controller 8 and the enabling end KSI of the instrument 5 are connected with the positive pole of the storage battery 11 by leads through the system power-on switch 4; the traveling controller 16, the pump controller 8, the B-end of the instrument 5 and the GND end of the accelerator 1 are connected with the cathode of the storage battery 11 by leads; the signal end of the accelerator 1 is connected with DI, A I ends of the walking controller 16 by leads, and the forward and backward signals of the direction handle 2 are connected with a function port of the walking controller 16; the hand brake 3 signal is connected with the walking controller 16 to realize the parking function; the main contactor 15 is connected with the walking controller 16 through an auxiliary contact and is used for controlling the on-off of a system loop; the TU end, the TV end and the TM end of the alternating current asynchronous walking motor 12 are respectively connected with the walking controller 16 by leads; the walking motor temperature sensor 13 is used for monitoring the temperature of the alternating current asynchronous walking motor 12; the walking motor speed encoder 14 is used for feeding back the running rotating speed of the alternating current asynchronous walking motor 12; the operating handle 6 is connected with a pump controller 8 to realize the functions of lifting, lateral moving, inclining and accessory; the PU, PV and PM ends of the permanent magnet synchronous pump motor 10 are respectively connected with the pump controller 8 by wires; the pump motor temperature sensor 7 is used for monitoring the motor temperature of the permanent magnet synchronous pump motor 10; the pump motor rotary encoder 9 is used for feeding back the running rotating speed of the permanent magnet synchronous pump motor 10, and the walking controller 16 and the pump controller 8 upload system information to the instrument 5 in a CAN bus mode, so that the running state of the permanent magnet synchronous system is monitored.
After the vehicle is started, the controller firstly carries out self-checking, if the self-checking fails, the instrument 5 displays a fault and prompts a driver to stop checking. And if the self-checking is passed, allowing the electric forklift to work.
The logic control flow of the alternating current asynchronous control system is as follows: when a driver triggers a forward and backward signal through the direction handle 2, and the walking controller 16 detects a signal of the accelerator 1, the walking controller 16 converts direct current of the storage battery 11 into three-phase alternating current of the alternating current asynchronous walking motor 12, sets a rotating speed to enable the alternating current asynchronous walking motor 12 to generate torque, and transmits the rotating motion of the alternating current asynchronous walking motor 12 to wheels through a transmission device to drive the forklift to run. At this time, the walking controller 16 is used for monitoring the temperature of the alternating current asynchronous walking motor 12 through the walking motor temperature sensor 13; the running speed of the ac asynchronous running motor 12 is monitored by the running motor speed encoder 14. When the temperature or the rotational speed is abnormal, the walking controller 16 reminds through the meter 5.
The logic control flow of the permanent magnet synchronous control system is as follows: when a driver operates the operating handle 6 and the pump controller 8 detects a demand signal, the pump controller 8 controls U, V, W three-phase windings to generate magnetic fields in the corresponding windings, the permanent magnet rotors synchronously rotate under the action of the magnetic fields, and lifting, side shifting, inclining and accessory functions are realized through the hydraulic device. At the moment, the pump controller 8 is used for monitoring the temperature of the permanent magnet synchronous pump motor 10 through the pump motor temperature sensor 7; the running speed of the permanent magnet synchronous pump motor 10 is monitored through the pump motor rotary encoder 9. When the temperature or the rotational speed is abnormal, the pump controller 8 is notified by the meter 5.
In conclusion, the semi-permanent magnet control system applied to the electric forklift, provided by the utility model, has the advantages that the walking system adopts an alternating current asynchronous system, the oil pump system adopts a permanent magnet synchronous system, the advantages of the permanent magnet synchronous motor are furthest exerted, the operation efficiency of the electric forklift is obviously improved, the energy consumption is reduced, and the cruising time of the electric forklift is increased by 10% compared with that of a common electric forklift under the same condition.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than others, combinations of features of different embodiments are also meant to be within the scope of the utility model and form different embodiments. For example, in the above embodiments, those skilled in the art can use the combination according to the known technical solutions and technical problems to be solved by the present application.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. A semi-permanent magnet control system, comprising:
the walking system comprises a walking controller, a direction handle connected with the walking controller, an accelerator and an alternating current asynchronous walking motor, and the alternating current asynchronous walking motor is controlled to do corresponding actions through instructions input by the direction handle;
the oil pump system comprises a pump controller, an operating handle and a permanent magnet synchronous motor, wherein the operating handle and the permanent magnet synchronous motor are connected with the pump controller;
the walking controller and the pump controller are connected with the instrument to monitor the running state of the semi-permanent magnet control system;
the walking controller, the oil pump controller, the instrument negative pole end and the accelerator negative pole end are connected with the negative pole of battery.
2. A semi-permanent magnet control system according to claim 1, wherein:
the walking system also comprises a walking motor temperature sensor;
and the walking motor temperature sensor is connected with the walking controller and is used for monitoring the temperature of the alternating current asynchronous walking motor.
3. A semi-permanent magnet control system according to claim 1, wherein:
the walking system also comprises a walking motor speed encoder;
and the walking motor speed encoder is connected with the walking controller and is used for feeding back the running rotating speed of the alternating-current asynchronous walking motor.
4. A semi-permanent magnet control system according to claim 1, wherein:
the walking system also comprises a hand brake;
and the hand brake is connected with the walking controller to realize the parking function.
5. A semi-permanent magnet control system according to claim 1, wherein:
the walking system also comprises a main contactor;
and the main contactor is connected with the walking controller and is used for controlling the on-off of a system loop.
6. A semi-permanent magnet control system according to claim 1, wherein:
the oil pump system further comprises a pump motor temperature sensor;
the pump motor temperature sensor is connected with the pump controller and used for monitoring the motor temperature of the permanent magnet synchronous pump motor.
7. A semi-permanent magnet control system according to claim 1, wherein:
the oil pump system also comprises a pump motor rotary encoder;
the pump motor rotary encoder is connected with a pump controller and used for feeding back the running rotating speed of the permanent magnet synchronous pump motor.
8. A semi-permanent magnet control system according to claim 1, wherein:
the direction handle is provided with forward and backward input instruction keys;
the operating handle is provided with lifting, side shifting, inclining and accessory input command keys.
9. A construction machine characterized in that:
a semi-permanent magnet control system according to any one of claims 1 to 8 is installed.
10. A working machine according to claim 9, characterized in that:
the engineering machinery comprises an electric forklift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122217870.2U CN215558787U (en) | 2021-09-14 | 2021-09-14 | Semi-permanent magnet control system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122217870.2U CN215558787U (en) | 2021-09-14 | 2021-09-14 | Semi-permanent magnet control system and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215558787U true CN215558787U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122217870.2U Active CN215558787U (en) | 2021-09-14 | 2021-09-14 | Semi-permanent magnet control system and engineering machinery |
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| Country | Link |
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| CN (1) | CN215558787U (en) |
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2021
- 2021-09-14 CN CN202122217870.2U patent/CN215558787U/en active Active
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