Inductive Power Transfer (IPT) technology transfers power from a power supply to a power load in a non-contact manner. It has the advantages of safety, reliability, and flexible power supply. It has become a research focus at home and abroad in recent years [1 2]. With the increasing shortage of global oil fuel and the continuous deterioration of the natural environment, electric vehicles have been vigorously promoted by countries around the world. However, the charging problem has become the biggest issue that limits the development of electric vehicles [3].
The application of inductive power transmission technology to electric vehicles has attracted more and more attention from domestic and foreign research institutions [4]. At present, the traditional static wireless charging technology has disadvantages such as short cruising range, heavy and expensive battery packs, frequent charging and the like when applied to an electric vehicle. Therefore, in this context, the dynamic wireless power supply technology of electric vehicles is used by people. Proposed [5], this technology ensures that the electric vehicle is provided with energy in real time during the driving process, which reduces the number of electric vehicle battery packs and improves the mileage of the electric vehicle, which promotes the marketization of electric vehicles.
In order to realize the dynamic power supply of electric vehicles, there is a long-term IPT power supply coil scheme [6-7], but this will certainly increase the power loss and reduce the power transmission efficiency. Also, when a longer primary power supply coil is used, the secondary power pick-up coil cannot completely cover the primary power supply coil range, resulting in electromagnetic leakage [8]. Therefore, the use of subsection rail power supply is a more reasonable and effective method.
At present, domestic and foreign companies have conducted preliminary research on IPT segmented power supply technology, and have mainly focused on power supply coil switching modes [9-10] and power supply coil switching methods [11-12].
This paper focuses on the single-rail dynamic power supply for single-inverter power supply and multi-primary LCL coils [13]. However, when using this segmented rail power supply, there is a problem that when the electric vehicle is still coupled with the first LCL primary coil, all the remaining LCL primary coils are energized and there is a large primary coil current. This brings about system power loss and large electromagnetic radiation.
At the same time, if the coils are removed directly in series with the LCL coil loops in parallel, a large switching force will be brought. Therefore, an LC network with an AC switch is proposed. By adjusting the on and off of the AC switch, the current of the primary coil is reduced, thereby reducing the power loss of the system and reducing the electromagnetic radiation, and the inverter works in a soft-switching state.
in conclusion
In this paper, we mainly study the problem of single-rail power supply and multi-primary LCL coils connected in parallel. The proposed LC network contains AC switches. By adjusting the on-off of the AC switch, the current of the primary coil can be reduced and the system power can be reduced. Loss, reduce the purpose of electromagnetic radiation.
Firstly, the resonant compensation topology of LCL-S is analyzed, and the topology has the advantage that the output current of the primary coil is constant. Then, the primary coil current regulation principle of the LC network with AC switch is introduced, and the detailed formula deduction is performed. Finally, the LCL-S IPT experimental system was built to simulate the charging process of the electric vehicle. Experiments have shown that when the AC switch is closed, the primary coil current can be effectively reduced, and the purpose of reducing system power loss and reducing electromagnetic radiation can be achieved.
In this paper, the secondary coil is slowly moved into and away from the primary coil from a distance to simulate the process of entering, charging, and moving away from a remote location. Only a primary coil is built to verify the effectiveness of the proposed method. Multiple LCL primary coils are built in parallel to simulate the complete segmented guide rails for charging the electric vehicle.
Wireless power supply technology
CNC Saw Blade Pipe Cutting Machine
1. Servo motor-driven feeding system: AC servo motor/C5 ball screw and linear guide are adopted, which are fast, stable and accurate. The maximum feed speed of the Saw Blade cutting machine is 1500mm/s.
2. Chittak's unique patent: large pipe clamp device, which reduces the vibration of the pipe during operation, prolongs the life of the saw blade, and ensures the feeding speed. Patent number: ZL 2009 1 0039079.8
3. The minimum tail length of saw blade cutting is 20-30mm.
4. The control system is developed by Chittak, the database is rich and can be updated. easy to use.
5. Equipped with automatic detection and alarm information system, which is convenient for users to troubleshoot.
6. Five different cutting lengths can be set for a single material to reduce the waste of excess material.
7. The model can update the automatic feeding system, which greatly improves the efficiency and saves labor costs. At the same time, it can be equipped with a conveyor belt to transport the finished product to the next process. All updated functions can be controlled by the cutting machine system.
8. This metal pipe cutting machine can cut multiple pipes at the same time.
9.Chittak has many other pipe processing products:Automatic 3D Laser Pipe Cutting Machine, Handheld Laser Welding Machine, Saw Blade Pipe Cutting Machine, Pipe Bending Machine , Pipe Chamfering Machine ,Metal Plate Cutting Machine and Accessories like saw blade etc.. Welcome your enquiry and hope build the business relationship with you !
Automatic Angle Pipe Cutting Machine,Cnc Servo Hydraulic Cutting Machine,Full Automatic Pipe Cutting Machine,Saw Blade Cutting Machine
GUANGDONG CHITTAK INTELLIGENT EQUIPMENT CO.,LTD , https://www.ctklasercutting.com