Jinzhou Jinli Electric Apparatus Co., Ltd.
Jinli Electric Co., Ltd. is a national high-tech enterprise engaged in the development, manufacture, sales and service of power semiconductor devices, and has obtained a national invention patents, seven utility model patents only in the year of 2012 and 2013, and won the support funds for provincial key scientific and technological enterprises. Jinli Electric Co., Ltd. was established in 2001, located in Linghe District, Jinzhou City, Liaoning Province, covering an area of over 20,000 square meters.and own subsidiary company R-Switch Industry Group that responsible for exporting to foreign market.
The data given in the parameter table of this manual, ITSM, I2t, dv/dt, and di/dt are the minimum values that the component can satisfy, and the maximum value of Qrr, TQ, VTM, VTO, and rT can be satisfied (not more than).
The international name of SCR (SCR) is Thyyistoy, or Chinese referred to as thyristor. It can work under the condition of high voltage and high current. It has the advantages of high pressure, high capacity, small volume and so on. It is a high-power switch type semiconductor device. It is widely used in electric power and electronic circuits.
Over-voltage breakdown: overvoltage breakdown is one of the main causes of silicon controlled breakdown. The ability of SCR to withstand overvoltage is almost no time. Even in a few milliseconds, the overvoltage will be penetrated. Therefore, in the actual application circuit, the RC absorption loop must be attached to the two ends of the SCR to avoid any irregularity. The instantaneous overvoltage caused by the interference pulse. If thyristor breakdown occurs frequently, check whether the components of the absorption circuit are burned or failed.
With the rapid development of the national economy, the number of high-voltage motors is increasing. Because the direct current of the large motor is 5~7 times of the rated current, the starting torque is only 0.4 to 1.6 times of the rated torque. It can be started directly under the condition of power grid (less than 10% of the grid voltage when the motor starts up) and the process conditions (starting torque satisfy). But the excessive starting current, too small starting torque and too long start-up time have caused great harm to the motor and the power network. It often causes the increase of the power grid voltage and the harmonic voltage fluctuation, even the front step, greatly increasing the burden of the power grid and the pollution of the power grid, which seriously affects the safe operation of the power grid. At the same time, it has also caused great harm to itself. Therefore, a soft starter should be connected between the power supply and the motor to solve these problems.
Abstract: with the rapid development of power electronics technology, intelligent soft starters are widely used. The intelligent soft starter is a new motor control equipment which integrates soft start, soft parking, light load energy saving and multi-function protection. It is also called Soft Starter. It not only realizes the shock and smooth starting motor in the whole starting process, but also adjusts the parameters in the starting process, such as the current limit and starting time, according to the characteristics of the load of the motor. In addition, it also has a variety of motor protection functions, which fundamentally solves the drawbacks of the traditional buck starting equipment.
Starting method and method overview the advantages and disadvantages of directly starting the motor direct starting current is about 5 times the normal operation, in theory, as long as the power supply to the motor and transformer capacity is more than 5 times more than the capacity of the motor, can be directly started. There are few equipment, simple starting mode and low cost for large capacity motor. On the one hand, the capacity of the power supply line and transformer is difficult to meet the condition of direct starting of the motor. On the other hand, the powerful starting current impact the power grid and motor, which affects the service life of the motor, so it is unfavorable to the power grid. Large capacity motor and can't start directly. Use self
Thyristor is the abbreviation of thyristor, also known as silicon controlled rectifier (SCR), formerly referred to as thyristor. The thyristor can be turned on by a signal, but cannot be turned off, so it is called a semi-controlled device. The name thyristor often refers specifically to a basic type of thyristor—a common thyristor. But in a broad sense, thyristor also includes many derivative devices, such as bidirectional thyristor (TRIAC), fast thyristor (FST), reverse conducting thyristor (RCT) and light-controlled thyristor (LTT), etc.