FPGA-based AC motor driver current controller 4
1. The reason why FPGAs are used to implement control functions is to make full use of their parallelism, which greatly reduces the computational delay. In a high-performance motor speed control system (when the cost of the control system is increased compared to its overall cost), the bandwidth of the control system will be greatly provided, resulting in higher speed performance and stability. Of course, "parallelism" is not infinite. In terms of algorithm decomposition, there are always some key "bottlenecks" that cannot be paralleled; from the perspective of FPGA, it is not unlimited parallel, and there are timing constraints. Etc. Limiting the length of an FPGA's internal wiring. Regarding the decomposition and parallel execution of algorithms, there are many books and materials. Parallel computing is also becoming a trend, so it is not described here. 2. If you write completely with the hdl code, the workload will be extremely large; for the more intuitive, you can use the system generator tool to directly produce; for some slower, such as human-machine interface, rs232, etc., you can use EDk A soft core is programmed to simplify the programming process. 3.Actel's "SmartFusion" series; SmartFusion is the industry's only programmable logic device with Cortex-M3 hard core that handles both analog and digital signals. The mixing of analog and digital signals is also a must for a motor control system: the acquisition of signals, for example, involves AD, and the action of the actuator necessarily produces digital to analog operation, so I think there should be more cost-effective chips in the future. appear. The combination of analog signals and high-frequency FPGA digital signals will also be a huge challenge for our design: comparing analog signals is too susceptible to interference. [[wysiwyg_imageupload:13:]] The Xilinx Analog-to-Digital Converter (XADC) is a stand-alone 12-bit, 1MSPS analog-to-digital converter using the same architecture as the previous VirtexTM products. In addition to general purpose analog integration, the XADC module includes temperature and power sensors to dramatically increase the reliability and safety of the FPGA. Xilinx flexible mixed signal;
Magnetic USB Cable refers to the magnet male and female to suction mode to connect the charging effect of the charging cable. Rely on the magnet magnetic attraction, traditional cable connector is separated from the cable body, both through magnetic in automatic adsorption within a certain distance, so called magnetic suction cable magnetic suction cable, magnetic suction cable, magnetic suction charging cable, etc.so that we can realize single hand plug cable, and in the process of actual use, the magnetic suction charging cable is safer than ordinary USB Cable.
Interface widely applicable to mainstream models.Thin small size for wide, differs from the traditional life of the common data interface,a new type of magnetic suction cable charging interface on the size of the thin body, even mobile phones with a set of use, magnetic suction cable also apply to the charging 90% of cell phone sets, don't need to pick a set can be used directly, so it is suitable for use in the increasingly miniaturization of electronic equipment, Can withstand more than 50,000 times of repeated insertion and removal. Fast transmission speed, perfectly compatible with mobile phone data transmission.
It is easy to use,can be single-hand operation,regardless of positive and negative, random insertion, the error rate is zero, even if the 3-year-old children can not be inserted wrong, very suitable for driving, sleeping and other life scenarios. The appearance of magnetic charging cable has impacted the market of Usb C Cable, because magnetic charging cable is much better than ordinary data cable, bringing too much convenience to life. The feeling of user experience has also risen, and more people begin to enjoy the sense of convenience brought by magnetic charging cable to life.
Magnetic Usb Cable,5A Usb Cable,Magnetic Micro Usb Cable,Led Magnetic Charging Cable
Henan Yijiao Trading Co., Ltd , https://www.yjusbhubs.com