With the development of automobile electrical, intelligent and Internet connections, as well as the improvement of artificial intelligence and driverless technology, traditional car entertainment information systems are also following this path of development and evolution. After years of development, the car infotainment system has evolved from the first generation of cassettes and tape recorders to the fourth generation of integrated car infotainment systems, with more comprehensive functions, larger screens, and man-machine Interactive technology is more intelligent system. At this stage, IVI can support a series of applications such as 3D navigation, traffic conditions, high-definition television, assisted driving, fault testing, vehicle information collection, vehicle body control, mobile office platform, wireless communication, live entertainment functions and TSP services. It has further improved the level of car digitization, digitization and intelligence.
The mechanical manufacturing industry applies many impact and discrete system loads in key processes, such as DC welding machines and laser welding equipment in car body shops. Stamping die equipment in the stamping die workshop; DC frequency conversion equipment in the paint workshop; for the automated assembly line in the assembly workshop, this impact load and the discrete system load have a mutual characteristic, that is, the load fluctuation is quite large, and the pulse current is very large.
Judging from the solutions of mainstream manufacturers, the power distribution system generally adopts a high-voltage three-in-one deep integration solution. The high-voltage three-in-one system refers to the system control module that integrates OBC (OBC (on-board battery charging, on-board charger), DC/DC and power distribution cabinet. The software processing speed of the high-voltage three-in-one system is high and greatly reduces The volume and quality of the system software are improved, which is beneficial to the lightweight improvement and space planning of the car. After the full application of BYD’s high-voltage three-in-one technology, the red and green density has increased by 40%, the volume has been reduced by 40%, and the weight has been reduced by 40%. The effect Significantly. We expect that Huawei’s high-voltage power distribution system will also adopt a high-voltage three-in-one deep integration solution, and the design concept will be consistent with the global mainstream new energy vehicle manufacturers.
Most welding machines and equipment in the automotive industry use 380-volt switching power supplies, which are powered by a two-phase power supply system (L1-L2, L2-L3 or L3-L1). Because of the unbalanced three-phase, the zero-sequence current should take into account the unbalanced compensation.
User Value of Reactive Power Compensation and Harmonic Control
Reduce the harm of harmonics, prevent the working voltage caused by harmonics from increasing and destroying various common faults such as electrical equipment, and improve the safety factor of the power supply system.
Manage harmonics, reduce harmonic current injected into the system, and meet our company’s standard requirements
Reactive power dynamic compensation, power factor up to standard, avoiding fines from power supply companies;
After reactive power compensation, the power supply current of the system is reduced, and the volume utilization of transformers and cables is improved.
Energy saving.
Problems you may encounter?
1. The total harmonic distortion rate of the 0.4kV low-voltage power distribution system seriously exceeds the standard, and there is serious harmonic power consumption in electrical equipment and transformers.
2 . 0 . 4KV side of course has a low power factor, and there are relatively serious three-phase unbalance and reactive power impact.
3.Common reactive power compensation devices have problems such as long dynamic response time and poor connection compensation accuracy, which cause long-term over-compensation and under-compensation of low-voltage buses.
Our solution:
1. Use Hongyan passive filter device to filter out the characteristic pulse current of the system, and compensate the reactive load at the same time. The power switch adopts a thyristor power switch, considering the requirement of rapid load transition.
2. The Hongyan dynamic safety compensation device adopts the mixed compensation method of three-phase compensation and sub-compensation to meet the compensation requirements of the three-phase imbalance of the system
3. Adopt the dynamic form of Hongyan series dynamic reactive power generating device, supply reactive power to each phase of the system, and manage each harmonic of the system at the same time
4. Based on the mixed application of the active filter Hongyan active filter and the dynamic safety compensation equipment Hongyan TBB, it can solve the pulse current hazard of the power distribution system in the machinery manufacturing industry, reduce system loss, and make the power distribution system Optimize high-efficiency operation, especially for customers who have high requirements for power safety production.
Post time: Apr-12-2023