LVP variable load phase advancer

Overview
The series of variable load phase advancers is a high-tech product developed by combining pulse width modulation AC and AC frequency conversion technology with microcomputer automatic control technology. It belongs to the key areas of scientific and technological innovation supported by the Ministry of Science and Technology. This product is a reactive power on-site compensation device specially designed for large and medium-sized wound-type asynchronous motors. Its remarkable feature is that it can be widely used in wound motors under various load conditions. When the load changes, the rated amount will exceed twice the rated amount when the load suddenly changes. Power factor compensation under working conditions fully realizes energy saving and consumption reduction of large and medium-sized winding asynchronous motors, highlighting the incomparable advantages of traditional reactive power compensation devices. It is connected in series in the motor rotor circuit, and changes the rotor by changing the rotor. The phase relationship between current and rotor voltage changes the corresponding relationship between motor stator current and voltage to achieve the purpose of improving the power factor, efficiency and overload capability of the motor itself, reducing the motor stator current, and reducing the motor's own losses.
In industrial and mining enterprises, the reactive power consumption of the power grid mainly comes from three-phase AC asynchronous motors. Therefore, reactive power compensation of high-power asynchronous motors is the main way for industrial and mining enterprises to save energy. At present, there are two main methods of reactive power compensation for large and medium-sized windings at home and abroad. One is a parallel capacitor on the stator side of the motor, and the other is a series-connected phase advance device on the motor rotor circuit. Both compensation methods are used in constant load conditions. For example, ball mills can achieve good compensation. However, under variable load conditions, due to the large change amplitude of the variable load, the characteristics of frequent mutations, and the intermittent process, neither the capacitor nor the existing static phase advancer can meet the requirements. Requirements for reactive power compensation of wound motors under variable load conditions. In view of this, our company independently developed a series of universal electronic soft phase advancers, which completely solved the reactive power compensation problem of wound motors under variable load conditions.
The series of variable load phase advancers adopt advanced AC frequency conversion technology, microcomputer automatic control technology, high-sensitivity electronic measurement technology and phase-locked loop phase locking technology, which can automatically track the changes in the motor load operating status and detect the motor's condition in a timely manner. Back electromotive force, determine the load size of the motor based on the change rate of the motor's back electromotive force, use phase-locked loop phase locking technology to track the locking compensation phase in a timely manner, automatically adjust the amplitude of the additional electromotive force superimposed on the rotor circuit, and automatically adjust relevant parameters, thereby making the motor The reactive power compensation always maintains the best compensation effect, saving energy and reducing consumption significantly. It makes the motor run efficiently and smoothly, greatly reducing the temperature rise of the motor and extending the service life of the motor.
The phase advancer can be widely used in the variable load state or constant load state of large and medium-sized wound asynchronous motors in steel, wood industry, sugar factory, rubber industry, metallurgy, mining, cement, chemical industry, papermaking, pharmaceutical and other industries. On-site compensation of large and medium-sized wound asynchronous motors. Such as ball mills, rolling mills, presses, fans, water pumps, crushers, compressors, etc.