What is a rectifier transformer used for?
The rectifier transformer is a power transformer in the rectifier equipment. The characteristics of the rectifier technology equipment are that the primary side inputs information exchange, and the secondary side outputs DC after the rectifier part is stopped. Generally, the transformer for rectification system power supply can be called rectifier transformer. Most of the industrial rectified DC power supply is obtained from the AC power grid through the rectifier transformer and rectifier equipment.
It can generally be used in lighting, electromechanical, mechanical enterprise electronic technology equipment, medical service equipment, etc. The product performance can meet various special requirements of users.
One, the electrochemical industry
This is an industry that electrolyzes non-ferrous metal compounds for the production of aluminum, magnesium, copper, and other metals with more rectification deformation. Electrolyzed salts are used in chlor-alkali production; electrolyzed water is used to produce hydrogen and oxygen.
2, traction DC power supply
It is used in the DC system network of electric locomotives in mines or cities. The connection of overhead lines on the valve side leads to many short-circuit errors, the degree of radiation of DC load changes is large, and the electric locomotives start frequently, causing short-term overloads of varying degrees. For this reason, the temperature rise of these transformers Both confinement and current density are reduced. The impedance is about 30% larger than the corresponding power system transformer.
3, drive DC power supply
It is mainly used to supply power to DC motors of electric drives such as armatures and magnets of rolling mills.
4, DC transmission
This kind of voltage interruption through the rectification control transformer is generally above 110kV, and the capacity reaches tens of millions of volts. Special attention should be paid to the maintenance of the intersection of grounding insulation and the analysis of DC superposition. In addition, the DC power supply for electroplating or electrical processing, and the DC power supply for stimulation , DC power supply for charging and static elimination, etc.
In the chemical industry where the application of rectification changes greatly, the high-power stop value is also similar to the electric furnace in many aspects due to the low secondary voltage and the large current. That is to say, the structural feature points mentioned above are also the same for the rectifier transformer. The major feature of the rectifier transformer is that the secondary current is not sinusoidal alternating current. Due to the unidirectional information conduction function of the rectifier element in the company's subsequent suspension, each phase line no longer needs to have a load working current at the same time, but the soft current signal conduction, unidirectional pulsating current It can be changed into a DC through the analysis filter. The secondary application voltage technology of the rectifier transformer is not only related to the capacitor connection group, but also the commonly used 3-phase bridge rectifier line, the rectifier line with double-half balance reactor, the same DC input and output. The secondary voltage and current of the rectifier transformer required for the voltage and current are also different, so the calculation of the parameter data of the rectifier transformer is based on the rectifier circuit.
The commutation change winding current contains non-sinusoidal multi-harmonics, so in order to reduce the harmonic pollution to the power grid, it is necessary to increase the pulse wave number of the commutation equipment to improve the power factor, which can be handled by the phase shift method. The purpose of the phase shift is to A phase shift is generated between the voltages of the same-named terminals of the secondary windings of the rectifier transformer.
