The features of dry rectifying transformer

It is the input current of the primary side, and the secondary side outputs DC after rectifying the original. Airflow is the general term for rectification, countercurrent and frequency conversion. Rectification is one of the most widely used. The transformer used as the power supply of the rectifier is called a dry rectifying transformer. Most industrial rectified DC power supplies are obtained from the AC grid through rectifier transformers and rectifier equipment.

The usage of dry rectifying transformer

Dry rectifying transformer are widely used in lighting, machine tool electrical appliances, mechanical and electronic equipment, medical equipment, rectifiers, etc. Dry rectifying transformer performance can meet various special requirements of users.

1. Electrochemical industry: This is the industry that uses the most dry rectifying transformer. It dissolves non-ferrous metal compounds to produce aluminum, magnesium, copper and other metals; electrolytic salt to produce chlor-alkali;

2. DC power supply for traction: DC power grid for mine or urban electric locomotives. Due to the overload of the overhead line connected to the valve side, there are many line faults and the DC load varies greatly. The electric locomotive often starts, causing short-term overload to varying degrees. For this reason, the temperature limit and current density of dry rectifying transformer are both low, and the impedance is about 30% larger than the corresponding power transformer.

3. DC power supply for transmission: It is mainly used to supply power to DC motors in electric transmission. Such as the armature and excitation of the rolling mill.

4. For DC transmission: The voltage of this type of rectifier transformer is generally above 110KV, and the capacity is tens of thousands of volt-amperes.

The characteristics of dry rectifying transformer

1. Stable electrical performance: The product combines the characteristics of the load with the voltage fluctuation of the power grid and atmospheric overvoltage and determines a reasonable and reliable insulation level and insulation model according to the load status of the rectifier transformer to fully ensure that the electrical performance of the product is reliable and stable. Product environmental safety factor ≥ 1.67.

2. High dynamic stability: Dry rectifying transformer winding has high mechanical strength and strong anti-burst ability to meet the extremely harsh load environment. In the design and manufacturing process, the source of dynamic instability caused by transformer magnetic leakage or abnormal transportation may be eliminated. Dry rectifying transformer has high dynamic stability. High impedance, 30% higher than the impedance of the power transformer of the same capacity, to suppress di / dt and effectively protect the rectifier components.

3. Good thermal stability of dry rectifying transformer: advanced product design, strictly control the temperature rise of the product's hot parts and the hottest spot, and leave sufficient temperature rise margin.

4. Strong overload capacity: Dry rectifying transformer has strong overload capacity and over-voltage capacity, and can be operated safely for a long time under rated load conditions, and can be safely operated at full load for a long time under 110% over-voltage conditions (ambient temperature 40 ℃).

5. Excellent performance index: the no-load current design and manufacturing value are lower than the national standard value of S9 series transformers with the same capacity which is based on the economic and reliability of full user use.