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Detailed Analysis of the Internal Structure of Amorphous Alloy Transformers
Amorphous alloy transformers are highly efficient and energy-saving transformers that utilize amorphous alloy strips as the core material. Their internal structures are meticulously designed, with all components working in harmony to achieve advantages such as high efficiency, energy savings, low noise, high reliability, and environmental performance. Below is a detailed breakdown of the internal structure of amorphous alloy transformers:
1. Core
Material Characteristics: The core is the core component of an amorphous alloy transformer, wound with amorphous alloy strips. Amorphous alloy is a material with a disordered atomic arrangement structure, which significantly reduces hysteresis loss and eddy current loss, thereby improving the efficiency of the transformer.
Structural Composition: The core consists of four separate core frames arranged in the same plane to form a three-phase, five-limb structure. It undergoes an annealing process and features crossed yoke joints with a rectangular cross-sectional shape. This design helps reduce magnetic flux leakage and structural losses, enabling the transformer to meet low-loss and low-noise requirements.
Performance Advantages: The amorphous alloy core exhibits high magnetic permeability and low coercivity, effectively enhancing the utilization efficiency of the magnetic field and further reducing energy losses.
2. Windings
Structural Form: The windings adopt a rectangular cross-section and can be wound separately into double-layer or multi-layer rectangular layered structures. This design aids in optimizing the electrical performance and mechanical strength of the windings.
Insulating Materials: The insulating materials for the windings are carefully selected to ensure good insulation performance during prolonged operation. Both the high-voltage and low-voltage windings are reinforced with sparsely wound non-woven adhesive tapes to enhance overall insulation performance and mechanical strength.
Low-Voltage Winding Design: The low-voltage winding adopts a foil structure to enhance the transformer's short-circuit withstand capability.
3. Oil Tank
Structural Characteristics: The oil tank features a fully sealed, maintenance-free corrugated structure. The corrugated cooling fins not only provide cooling but also possess a "breathing" function to compensate for volume changes in the transformer caused by temperature fluctuations. This design eliminates the need for a conservator in fully sealed transformers, reducing the overall height of the transformer.
Cooling Performance: The corrugated structure of the oil tank optimizes cooling performance, ensuring effective heat dissipation during transformer operation and preventing overheating.
4. Other Components
Insulating Bushings: Ensure electrical isolation between the windings and the oil tank, enhancing the safety performance of the transformer.
Ventilation Devices: Assist in heat dissipation of the transformer, ensuring it maintains an appropriate temperature during operation.
Transformer Oil: High-quality transformer oil is selected, and advanced dehydration, degassing, and impurity removal technologies are employed to ensure high purity and insulation properties of the oil, thereby improving the reliability of transformer operation.
Safety Protection Devices: All series of transformers are equipped with pressure relief valves. Gas relays with alarm and trip terminals can be installed according to user requirements to enhance the safety performance of the transformer.
Oil Temperature Measurement Devices: Transformers are equipped with a socket for a glass thermometer, which is installed at the top of the oil tank and extends a certain depth into the oil to accurately measure the oil temperature. Larger capacity transformers are also equipped with gas relays and signal thermometers for more comprehensive temperature monitoring.
5. Comparison with Traditional Silicon Steel Sheet Transformers
Core Material: Amorphous alloy transformers use amorphous alloy strips as the core material, while silicon steel sheet transformers use silicon steel sheets. The disordered atomic arrangement structure of amorphous alloy significantly reduces hysteresis loss and eddy current loss compared to silicon steel sheets.
Core Structure: The core of an amorphous alloy transformer consists of four separate core frames arranged in a three-phase, five-limb structure, whereas the core structure of a silicon steel sheet transformer may differ, typically adopting a laminated structure.
Winding Structure: The winding structures of both types are similar, but amorphous alloy transformers may adopt more optimized designs, such as rectangular cross-sections, double-layer or multi-layer rectangular layered structures, to improve insulation performance and mechanical strength.
Oil Tank and Cooling: The oil tank of an amorphous alloy transformer adopts a fully sealed, maintenance-free corrugated structure with superior cooling performance. In contrast, the oil tank structure and cooling methods of silicon steel sheet transformers may vary.
6. Advantages of Internal Structure
High Efficiency and Energy Savings: The low-loss characteristics of the amorphous alloy core enable the transformer to significantly reduce energy losses during operation and improve energy efficiency.
Low Noise: The optimized internal structure of the amorphous alloy transformer, such as the winding method of the core and the corrugated structure of the oil tank, helps reduce noise levels.
High Reliability: The use of high-quality materials and advanced manufacturing processes ensures the amorphous alloy transformer has high reliability and a long service life.
Environmental Performance: Amorphous alloy transformers generate less waste during the production process and have a smaller impact on the environment, meeting environmental requirements.
The main products include oil immersed transformers, dry-type transformers, power transformers, amorphous alloy transformers, mining transformers, box type substations, high and low voltage switchgear and supporting products
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