What is a motor soft starter (Shenma test version)
Fireworks 3000 years, life is full of joy to enjoy!
A few days ago, Chengdu was actually burning a fire. An article titled "What is Chengdu?" brushed a circle of friends and broke millions in less than half a day.
"What is Fujian?" and "What is Shanghai?" successively appeared on the stage and fired. "What kind" moments became popular on the Internet. We Taiwanese Electric also rushed to see if we could use "What kind"? One said that Taiwan's self-developed electrical motor soft starter.
"What is a motor soft starter" test version officially started, yeah ~
Utility Edition: It can start the motor smoothly and control the motor shake and howling at start-up. The motor soft starter is perfect~
Electrician's Edition: In the previous direct start, the electric current was instantaneously full, impacting the grid and motor and other equipment. With a soft starter, the current can be adjusted slowly and the motor can be started smoothly.
Vernacular Version: The soft-start principle is actually very simple, using three triacs connected to the motor. How to control the thyristor conduction angle to achieve the required voltage ramp.
Since the object of the soft start is a three-phase asynchronous motor at this time, the nonlinearity of the motor start-up process is a difficulty in the development of the soft-start design.
However, for the use of soft-start, only the input and output terminals of the secondary control loop such as start, stop, bypass and fault need to be mastered. As well as the current and voltage display on the soft-start control keyboard, as well as preparation, operation (bypass), failure of these indicators, you can probably use a good soft start, is not very simple, with a few times you become this aspect Experts ~
Baidu Encyclopedia Version: The motor soft starter is a new type of starter equipment designed and produced using power electronics technology, micro-processing technology and modern control theory. This product can effectively limit the starting current when the AC asynchronous motor is started. It can be widely used in loads such as fans, pumps, conveyors, and compressors. It is a traditional star/triangle conversion, auto-coupling step-down, magnetization step-down, etc. The ideal new generation of pressure equipment. (The soft starter's features, functions, working principles, startup methods, maintenance, etc., in turn)
Baidu knows the version: The soft starter is a novel motor control device integrating motor soft start, soft stop, light load energy saving and various protection functions. It is called Soft Starter abroad. Its main component is three antiparallel shunts and its electronic control circuit connected in series between the power supply and the controlled motor. Different methods are used to control the conduction angle of the three opposite parallel shunts, so that the input voltage of the controlled motor varies according to different requirements, and different functions can be realized. (To be honest, not to understand, what to stop, to soften up, like professional terms can be used in vernacular, it may be understood by professionals.)
The history of motor soft starters has also been in recent decades. Foreigners called Soft Starter, which was originally developed by foreigners. The first-generation soft starter was an on-line soft starter. ABB, Siemens, etc. were all initially on-line. At that time, the chips and control algorithms were still relatively backward. One or two generations of the motor soft starter were used to start the motor. Jitter and howling are obvious, but they are much better than direct start.
However, there are drawbacks to on-line soft start. The wear on the thyristor is very large. The thyristor technology is not as advanced as now. One can imagine the quality of the on-line soft starter.
For 5,000 years, the Chinese were smart. The Chinese developed a bypass-type soft starter based on an on-line soft start, which means that the soft start will switch to bypass operation after the motor starts. The soft start is not as long as the online type. The load operation not only prolongs the service life of the motor and other equipment and the soft starter, but also greatly reduces the on-line start-up failure.
Foreigners are not convinced, and your Chinese technology is irresistible. ABB, Siemens, Schneider and other electrical giants have built-in bypass soft starters. The contactors are built into the soft-start and the current and volume are small. Visual effects are much better, how is the price, or expensive?
What you have, I also want, the foreign moon is better than us, China's soft starter manufacturers have come up with built-in bypass soft starter, Renault, Xi Chi, Tianjin Noel, etc. for several years Built-in soft start, Xi'an Qigong didn't do it, and we did not do it, but this is not necessarily the case for Kazakhstan, there will be demand for a market, we can not be too rigid, the customer put forward, we have to try to meet e ~ Built-in bypass is not complicated!
Whether the motor soft starter is an external bypass or built-in bypass is good, we do not discuss here, this left to the market to answer! However, in the past two years, Wenzhou, Shandong, Henan and other places engaged in online soft start, online soft starter cabinet in the low-end market is very hot, why not pinch? We don't talk about quality. We all know what we've done! The key is cheap! Wenzhou people have the guts and courage to make industrial products directly into consumer products.
In the past two years, the area has been very hot, and electrical components and electrical companies have wanted to go out. This road is heavy and long-term. Manufacturers in Jiangsu and Zhejiang have already sold their products to Africa, India and other places. Road, selling technology is also a way? In the early years of reform and opening up and in the past 20 years, how many technologies were sold to us in Japan, the United States, and other countries, and how much money we made for Chinese people. Now that we have the technology, we have advanced control algorithms and we also need to put soft start-ups and control boards. Technology is sold to developed countries and developing countries such as India, Indonesia and Africa.
The digital age has come. Electronic information + has been constantly infiltrating into our work and life. The pace of updating and popularization of technology is too fast. The existing soft starters on the market are also constantly upgrading. Unfortunately, it is only a superficial article. , For example, the operation panel technology from the digital tube to the Chinese display, to the current LCD super-display, more and more stylish, high-end. The control algorithm was still a decade ago, and it almost didn't change. Fortunately, Taiwan's Tectronics has shifted its focus from R&D in 2012 to the basic theory and faced the real needs of customers. Based on the original algorithm, it has continuously optimized and developed. The construction elevator has a constant torque soft start, two sets of thyristor soft start, etc., while reducing costs, the reliability is also very good.
What will the future soft starter be like? Waterproof, can monitor and diagnose the motor in real time? Can it automatically detect various data and indicators of motor and soft starter? Let's call the family doctor of the motor. The future will not be far away. We look forward to it! (Jade Tai Chuang Jian Yan Micro Signal: ctcr123)
2018.3.15 Chengdu
July 12, 2019
