This may be due to the fact that the market is relatively narrow and the technology is difficult to develop. Domestic brands have hardly developed this compact soft starter. Let's consider that Taichung Electric is probably investigating compact soft start R&D for some time before 2011. A professor at the university gave several graduate students an internship at us, and achieved a consistent control of the currents of the two thyristors on a MATLAB/simul ink simulation platform. The control mode achieved a predetermined control effect, and the development module was successful. , But in the end, it is thought that the market usage is too small, and it is not finished and put into the market.

(Working principle) The compact soft start is also called the two-phase three-phase motor soft start controller. The two sets of thyristor trigger currents are used to start and control the protection motor. The vibration of the motor and the noise generated by the motor start may generate brakes. Torque, two-phase control uses a polarity balance method to achieve a soft start of the motor in terms of speed, torque, and current rise, thereby enabling a gentle two-phase start of the motor. At the same time, the sound quality of the start-up operation is close to that of a three-phase control soft starter. This can be achieved through continuous dynamic coordination and equalization of different polarity half-wave currents during motor soft start.

(Outline) The so-called compact type is this soft start with the advantages of small size, low power consumption, built-in bypass, and easy commissioning operation.

Taking the Siemens 3RW30 as an example, the required space is one-third of that of the traditional soft starter with bypass contactor, and the cable connecting the motor and the soft starter is also reduced from six to three, saving the cabinet and mounting rails. Cabling is very cost-effective.

(Function) The function of the compact soft start is almost the same as that of the bypass soft start function. Before starting, during start, after the start, the motor and soft start itself are protected, and they have functions such as soft start and soft stop. Start-up, constant-speed operation, and stoppage process are equipped with a variety of optional tuning parameters. Various protection and proactive functions protect the machine from the large acceleration torque during start-up, reduce component wear and reduce maintenance; protect the power supply system from excessive start-up Current impact and so on.

This soft start Siemens said he can do 250KW, but it is generally used in any occasion where the 55KW (3A-105A) electromechanical equipment requires soft stop or soft rise. Commonly, it is the startup scene of fans, pumps, cranes, mixers, conveyors, etc. .

(Price) The price of compact was consistently high in previous years, and the minimum power was several thousand. In the past two years, Taobao Tmall, the price of Alibaba.com's industrial products began to be transparent, and the price of electrical components of imported brands can be compared. However, in general, the price above 22KW is not cheap, and the low-power compact soft start below 15KW also has less than 1000 on Taobao. I don't know if it is true or false.

Let's say KBO again, the technical term is also called the control and protection switch (CPS). It's not too old, it's probably about 20 years old. The industry's first domestic KBO is circulated by Zhejiang Zhongkai Technology R&D and manufacturing. The name of KBO is still in the midst of Kai Kai. We did not do this. How did we not know that Ha ~ Zhongkai always used their KBO as CPS multi-functional appliances? The pioneers and creators themselves.

In academic newspapers and periodicals, CPS in the 1990s was still a blank in China. At that time, the State Economic and Trade Commission and the Ministry of Machinery Industry issued R&D assignments. Shanghai Electric Research Institute was responsible for product research and design. Zunyi Yongjia Electrical Factory was responsible for trial production. In production, Zhejiang Zhongxing Electric Switch Factory participated in the trial production of some products. In 1996, it successfully developed into the market. Zunyi's Yongjia Electrical Appliance Factory was restructured in 2001. It seems that it has not been done. ZTE Electric Co., Ltd. in Zhejiang Province may be Zhongkai Technology now.

The control and protection switch is an integrated electrical product integrating the main functions of circuit breaker (fuse), contactor, overload (or overcurrent, phase failure) protection relay, starter, isolator, etc., mainly used for AC 50Hz. (60Hz), rated voltage up to 690V, rated current from 0.8A to 630A, adjustable operating current from 0.8A to 630A in power systems, circuits under normal conditions (including defined overload conditions), The motor equipment has the functions of overload protection, over-current protection and short-circuit protection. The price of KBO is generally cheaper than soft starters, and the price on Taobao ranges from more than 200 to more than 600.

Attention to the next Kazakhstan, the key to come, compact soft start and control and protection switches have protection functions for the motor, compact soft start more soft start, soft stop and other functions, KBO more switch protection function, there is no soft stop soft Function. Therefore, in practical applications, KBO is much lower than the cost of soft start. In the market, KBO is generally used for control and protection and distribution protection of motors below 55KW. The compact soft-start is mostly used in electromechanical devices that require a step-down (soft-start) start-up below 22 kW.

So, can we combine the functions of compact soft-start and KBO, and integrate development of a KBO with soft-start function?

Soft start soft stop, soft start, overload, lack of equal protection and switch function control and protection switch, the key is the low cost, more expensive than KBO. We are creating a network in this area, development of the module is out, functional requirements to achieve control and protection requirements, but we are not strong manufacturing process this piece, is made into one machine or made KBO shape also needs more manufacturers and Dealer's valuable advice.

Professionalism is still left to professional people to do. Our advantage is development. Our R&D team comes from the background of high-speed railways of Southwest Jiaotong University, and there are opportunities for electronic science and technology of UESTC to bring us infinity. Therefore, these years We are constantly converting the most cutting-edge theories into products (active filtering, SVG, automotive motor control, automotive viscosity control, etc.) and upgrading with existing products. Let's upgrade it, make it digital, and turn things into things.

Therefore, KBO with soft start function, we produce or sell technical solutions, or buy a control panel directly? Our advantage is R&D. We should develop products that more customers need, so no matter where you are a distributor or manufacturer, you can contact us as long as you have the resources in this area.

Jiaoda Taichung Electric Jianyan Micro Signal ctcr123

2018.3.22