Widely used in lighting, machine tools, electrical appliances, mechanical and electronic equipment, medical equipment, rectification devices and so on. Product performance can meet various special requirements of users.
I. Electrochemical industry
This is the industry that uses rectifier transformers the most, producing aluminum, magnesium, copper and other metals by electrolysis of non-ferrous metal compounds; Electrolytic salt production to chlor-alkali; Electrolyzing water produces hydrogen and oxygen.
Second, traction DC power supply
DC network is used for electric locomotives in mines or cities. Because the valve side is connected with overhead lines, there are many short-circuit faults, the DC load changes greatly, and the electric locomotive is often started, resulting in different degrees of short-term overload. Therefore, the temperature rise limit and current density of this transformer are low. The impedance is about 30% larger than that of the corresponding power transformer.
Third, DC power supply and transmission
It is mainly used to supply power to DC motor in electric drive, such as armature and excitation of rolling mill.
Iv. DC power transmission
The voltage of this rectifier transformer is generally above 1 10kV, and its capacity is tens of thousands of kva. Special attention should be paid to the superposition of AC and DC insulation to ground.
In addition, there are DC power supplies for electroplating or electro-machining, DC power supplies for excitation, and DC power supplies for charging and electrostatic dust removal.
The characteristics of rectifier equipment are that the primary side inputs current, and the secondary side rectifies the primary side and outputs DC. Frequency converter is the general name of three working modes: rectification, countercurrent and frequency conversion, among which rectification is the most widely used. A transformer used as a power supply for a rectifier device is called a rectifier transformer. Most industrial rectified DC power supplies are obtained from AC power grid through rectifier transformers and rectifier equipment.