Classification and characteristics of reactors

Classification of reactor

1. According to the wiring, it can be divided into series and parallel;

2. According to the function, it can be divided into current limit and harmony;

3. According to others, it can be divided into input and output.

4. According to the purpose, it can be divided into filtering, communication, arc suppression, starting, electric furnace, flat wave.

5.According to the structure and cooling medium, it can be divided into hollow, iron core, dry type and oil immersion;

◆Series reactor: usually plays a role in current limiting.

◆Shunt reactor: often used for reactive power compensation and filtering.

◆Current-limiting reactor: That is, the equipment and the power circuit are connected in series to limit the short-circuit current value.

◆Harmonic reactor: The current passing through the inside belongs to alternating current, which is connected in series with the capacitor and then classifies the specified n-th harmonics to form series resonance, so as to absorb the calcium harmonic components, usually n=5, 7, 11, 13, 19.

◆Input reactor: Its function is to limit the voltage drop on the grid side of the converter during commutation, and it can also effectively suppress the coercion and decoupling of parallel converter groups. It is often applied to industrial and factory automation control systems. Among.

◆Output reactor: The main function of this type of reactor is to limit the capacitive charging cable of the motor connecting cable, and it can also limit the voltage rise rate on the motor winding to within 540V/Us.

◆Filtering reactor: It is mainly used in two aspects. The first is that it can reduce the ripple amplitude of the DC current in the rectifier circuit, and the second is that the reactor can be formed with a capacitor to resonate at a certain frequency. In order to eliminate the voltage or current of a certain harmonic of the power circuit.

◆Communication reactor: This equipment can also be called a "wave stopper", which is connected in series to the transmission line that also serves as a communication line. The reactor can effectively block the carrier signal and make it enter the receiving device to complete the communication The role of.

◆Arc suppression reactor: This equipment is also called "arc suppression coil". It is usually connected to the position between the neutral point of the three-phase transformer and the ground. It is mainly used for supply when one phase of the three-phase power grid is grounded. The inductive current can compensate for the capacitive current flowing through the grounding point, and at the same time, it also plays a role in making the arc not easy to continue to ignite. The reactor can eliminate the overvoltage phenomenon caused by the reignition of the arc repeatedly.

◆Starting reactor: It is connected in series with the motor to limit the unstable current of the motor when starting.

◆Electric furnace reactor: Generally, it is connected in series with an electric furnace transformer to limit the short-circuit current of the transformer.

◆Smoothing reactor: This type of reactor is installed in the DC circuit after rectification. Due to the limited pulse number of the rectifier circuit, the output rectified voltage always has ripple phenomenon, so it needs to be suppressed by a smoothing reactor .

◆Air-core reactor: It means that no iron core is used in the coil, and the magnetic flux of the reactor is all closed by air.

◆Iron core reactor: all or most of its magnetic flux passes through the iron core to complete the closing action.

◆Dry reactor: The coil is often exposed to the air, and solid insulating materials such as wood, cardboard, laminated insulating board, cement, etc. are used as ground insulation and turn-to-turn insulation.

◆Oil-immersed reactor: It means that the coil of the reactor is installed in an oil tank, and paper, cardboard and transformer oil are used as ground insulation and inter-turn insulation.

Features of reactor

1. The characteristics of the output reactor: It can be used for reactive power compensation and harmonic control, and it can also compensate for the influence of long-line distributed capacitance and suppress the output harmonic current. It effectively protects the frequency converter and improves the power factor. The reactor can also prevent interference from the power grid and reduce the pollution of the power grid caused by the harmonic current generated by the rectifier unit.

2. The characteristics of the input reactor: it is also suitable for reactive power compensation and harmonic control, and it can also limit the current impact caused by the sudden change of grid voltage and operating overvoltage. The reactor can effectively filter the harmonics. Suppress the occurrence of distortion of the grid voltage waveform.

3. Features of smoothing reactor: It can limit the short-circuit current and suppress the influence of the intermediate frequency component on the power frequency grid. It has a filtering function to make the output waveform continuous.

The above is the classification and characteristics of reactors, I hope to help everyone.okplazas.com electromechanical mall specializes in sales of reactors, filter reactors and other products. Welcome to email: [email protected] for consultation, and you can also contact WeChat customer service +86-13689242098 online for product consultation!