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Abstract: This paper describes the basic principle of space voltage vector (SVPWM), introduces the method of using matrix to calculate the action time of two adjacent vectors and the method of using digital signal processor TMS320F240 to generate symmetrical space voltage vector. Its excellent performance can complete the SVPWM control algorithm in real time, and it is fast and accurate. Keywords: space voltage vector; Pulse width modulation; Introduction of Digital Signal Processor 1 Space vector PWM is widely used in AC speed regulating systems. Space vector PWM is an optimized PWM method, compared with the traditional SPWM method [Detailed]
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In 2016, the Chinese market sold 47.79 million air conditioners, 34.62 million refrigerators and 34.28 million washing machines; Retail sales reached 160.6 billion yuan, 96.4 billion yuan and 61.5 billion yuan respectively. In the case of increasingly saturated demand for household appliances, China's white electricity industry still has a good answer. The good news of white power industry came, and what about the performance of the three white power giants? With the release of 2016 annual performance reports, Gree Electric (hereinafter referred to as "Gree"), Midea Group (hereinafter referred to as "Midea"), Qingdao Haier (with [Detailed]
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Without any warning, Broadcom's 100 billion dollar offer plan was put before Qualcomm. It was too late to think about it. The surge in the capital market has added some fire to the "game" between the two sides. Now let's take a look at the relevant content together with the mobile phone portable editor. The capital market is exciting. Both Broadcom and Qualcomm rank in the top five in the global semiconductor revenue rankings. The combination of the two will lead to the birth of new giant semiconductor companies. More importantly, past mergers and acquisitions in the chip field have proved that whether big fish eat small fish or snake eat elephant, smart investment cases can always be obtained in the capital market [Detailed]
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On May 13, 2008, STC launched a series of innovative insulated gate bipolar transistors (IGBTs). The new series of products adopt efficient life control processes to effectively reduce energy consumption during the turn off period. If the design engineer adopts ST's new IGBT (including STGxL6NC60D600VPowerMESH ™）， It is used in energy-saving circuits such as lighting ballasts with operating frequencies over 20kHz, and the overall power applied is expected to increase to a new level [Detailed]
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PadFoneX Sina Mobile News On the morning of June 3, it was reported that ASUS recently said that its new cross-border mobile tablet product PadFoneX would begin to accept reservations from American users on June 6, and it has cooperated with AT&T to launch two packages for users to choose: a two-year contract price of 199 dollars (about 1245 yuan) or a monthly contract price of 22.92 dollars (about 150 yuan). The international version of the machine is PadFoneS. The specific configuration of PadFoneX is equipped with 5-inch [Detailed]
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/*Please indicate the source for reprinting: tedeum.iteye.com/First, use usart1, pin pa9, pa10 without interruption. This method has been verified on f3discovery. Source: https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=%2Fpublic%2FSTe2... [Detailed]
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1 Introduction AC motor has the advantages of reliability, simplicity and cheapness. However, most of the current common inverters sold on the market are general purpose inverters. If they are directly used in the photovoltaic water pump system, they can not achieve various protection functions well. At the same time, they do not have the maximum power point tracking function of solar cells, resulting in a huge waste of solar cell capacity and internal resources of the general inverter. This paper makes full use of the internal resources of the general inverter, improves the general inverter, and realizes the general inverter with the control function of photovoltaic water pump system. Experiments show that the improved universal frequency conversion [Detailed]
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1. Introduction With the development of measurement and control technology and the continuous expansion of its application scope, data acquisition methods and storage technologies have undergone tremendous changes in content and form. In this process, the test requirements of multi-channel, high sampling rate and real-time storage of a large amount of data pose challenges to the existing test system. How to effectively store and analyze a large amount of data in the test process has become the first issue for engineers to consider. This paper introduces the combination of data acquisition card based on PXIE bus and RAID 0 disk array [Detailed]
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[Release of the 2023 World Robot Report] Recently, the International Federation of Robots (IFR) released the 2023 World Robot Report (hereinafter referred to as the Report). The Report shows that in 2022, the number of newly installed industrial robots in global factories will be 553052, up 5% year on year. According to regional division, Asia accounts for 73%, Europe accounts for 15%, and America accounts for 10%. Marina Bill, president of the International Robot Federation, said that in 2023, the number of newly installed industrial robots will exceed 500000 for the second consecutive year. It is estimated that in 2023 [Detailed]
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On August 13, it was reported that Tianbing Technology had completed tens of millions of angel+round financing in July this year. This round of financing was led by Inno Angel, followed by Eagle Fund and Yilai Capital, and the angel round investors Zhejiang University Lianchuang and Jiuyou Capital made additional investment. This round of financing will be mainly used for the development of the new generation aerospace propulsion system and the improvement and construction of the talent team. Previously, Tianbing Technology received tens of millions of yuan of angel round financing from Lu Shi Investment, Zhejiang University Lianchuang and Jiuyou Capital at the beginning of its establishment in January 2019. It is understood that unlike the bipropellant cryogenic liquid propulsion system commonly used in domestic commercial aerospace, Tianbing Technology independently developed the next [Detailed]
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This paper analyzes the reasons why the electric light controlled by radio remote control switch cannot be popularized. This paper introduces a new type of infrared switch Kling switch for intelligent building control lighting. The advantages of replacing the central lighting control system with Kling switch are obvious, that is, any home appliance remote controller can control the lamps. Several home appliance remote controllers in the room are equivalent to several sets of central lighting control systems, which are simple in construction, reliable in performance, compatible with remote control and manual control, low in investment and easy to maintain. Now, household appliances have basically realized the remote control function. Products such as fans and air conditioners are used less than half of the time every year, and remote control is also achieved without exception. But [Detailed]
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The foundry team of Samsung Electronics has changed from ugly duckling to swan! It is reported that the team will get rid of the impact of Apple's order conversion, and its revenue is expected to grow by 10% this year. Samsung plans to make wafer foundry independent after seeing the hot demand for orders. Korea Economic Daily reported on the 28th that industry news revealed that the wafer foundry team affiliated to Samsung System LSI had increased its performance by 10% this year to $4 billion, which means that 40% of Samsung's non memory business revenue came from wafer foundry. It is understood that Samsung, encouraged by its outstanding achievements, is ready to launch its wafer foundry business from Syst [Detailed]
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BMW will show two mini concept cars at the upcoming IAA2017 Auto Show in Frankfurt, both of which will use 3D prints. Many people are talking about the MiniElectric concept car. BMW will release an all electric production model in 2019. It and MiniJohn CooperWorks GP concept design research will be displayed at IAA2017 Auto Show. Both models are equipped with 3D prints. In the electric car model, the inlay of the wheel and air inlet is 3D printed. At the same time, in the GP concept, 3D printing [Detailed]
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Introduction With the increasing scale and resources of chips, the design complexity of chips has increased greatly. In fact, after the chip design is completed, it is sometimes necessary to change some controls according to the situation, which is often encountered in the use process. At this time, it is not advisable to change the chip design again, because it requires designers to participate in such changes, which is unacceptable to both designers and users. So it is necessary to make this simple control that can be changed exist in the chip design, and at the same time, it should also make this change relatively easy, more general, and [Detailed]
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Start to research and develop a sharing platform that controls the lifeblood of future electric vehicle development. Today, the global automotive industry is ushering in a once-in-a-century wave of technological innovation. Among them, the two most representative technology fields are the electrification and automatic driving of automobiles, among which the field of pure electric vehicles (EV) driven by motors has attracted much attention. As we all know, compared with traditional fuel vehicles, pure electric vehicles are not only green and environmentally friendly, but also have the characteristics of halving the number of parts, low production costs, and low market prices, which can meet the needs of more consumers for cars. According to the survey data (※) released by a consulting company, it is estimated that in 2025 [Detailed]
