Low Frequency Transformer According To The Power Phase Number Points
Low Frequency Transformer According to the power phase number points
Sort by cooling: dry (self-cooling) transformers, oil immersion (self-cooling) transformers, fluoride (evaporative cooling) transformers.
According to moisture-proof classification: open-type transformers, potting transformers, sealed transformers.
According to the core or coil structure classification: core transformer (insert core, C core, ferrite core), shell transformer (insert core, C core, ferrite core), Ring transformers, metal foil transformers.
According to the number of power supply categories: single-phase transformers, three-phase transformers, multi-phase transformers.
Classification by use: pulse transformer.
Second, the power transformer characteristics of the parameters
1, the working frequency
Transformer core loss and the frequency of a great relationship, it should be based on the use of frequency to design and use, this frequency, said the operating frequency.
2, rated power
At the specified frequency and voltage, the transformer can work long hours, and does not exceed the specified temperature rise of the output power.
3, rated voltage
Means that the voltage applied to the coil of the transformer shall not be greater than the specified value.
4, the voltage ratio
Refers to the transformer primary voltage and secondary voltage ratio, there is no-load voltage ratio and load voltage ratio difference.
5, no-load current
Transformer secondary open circuit, the primary still have a certain current, this part of the current called no-load current. The no-load current consists of magnetizing current (generating flux) and iron loss current (caused by core loss). For a 50 Hz power transformer, the no-load current is substantially equal to the magnetizing current.
6, no load loss
Refers to the transformer secondary open circuit, measured in the primary power loss. The main loss is the core loss, followed by the no-load current in the primary coil copper resistance on the loss (copper loss), this part of the loss is very small.