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Products
I. Current waveform characteristics
Non-sinusoidal waveform output
Each arm of the rectifier conducts in turn during the cycle, resulting in an output current waveform that is close to an intermittent rectangular waveform rather than a sinusoidal waveform. This waveform contains a large number of harmonic components that may increase eddy current losses.
Harmonic Effects
When using thyristor rectification, the increase in hysteresis angle will aggravate the steepness and harmonic content of the current waveform, requiring special attention to the filtering design.
II. Structure and performance characteristics
Lower utilization rate
Because the secondary conductive time only accounts for a part of the cycle, the utilization rate of rectifier transformer is lower than that of ordinary transformer, resulting in larger volume and weight under the same capacity.
Capacity calculation method
The capacity is the average of the apparent power of the primary and secondary sides (equivalent capacity) rather than the single winding capacity of an ordinary transformer, and the difference is significant especially in scenarios such as half-wave rectification.
High short-circuit dynamic stability requirements
Need to strictly meet the short-circuit dynamic power withstand capacity, the design needs to optimize the winding structure and materials to enhance mechanical strength.
III. Application Scenarios and Adaptability
Wide voltage regulation range
For example, in the aluminum electrolysis scenario, the voltage regulation range can be up to 5%~105%, which needs to be realized by tapping or phase-shifting technology.
High efficiency and low noise
Adopting energy-saving design, low noise operation, and supporting overload operation (e.g. 110% voltage, 40ºC environment).
Multi-discipline Adaptability
Applicable to electrochemical industry (electrolytic aluminum, chlor-alkali), power traction (mining locomotive), DC transmission and other scenarios, to meet the high-current, low-voltage demand.
IV. Difference with ordinary transformers
In addition to the above characteristics, rectifier transformers also need to cope with DC side of the load sudden change (such as motorcycle startup), so the impedance design is larger (about 30% higher than the power transformer), the temperature rise limit value is lower to improve stability.
Products
I. Current waveform characteristics
Non-sinusoidal waveform output
Each arm of the rectifier conducts in turn during the cycle, resulting in an output current waveform that is close to an intermittent rectangular waveform rather than a sinusoidal waveform. This waveform contains a large number of harmonic components that may increase eddy current losses.
Harmonic Effects
When using thyristor rectification, the increase in hysteresis angle will aggravate the steepness and harmonic content of the current waveform, requiring special attention to the filtering design.
II. Structure and performance characteristics
Lower utilization rate
Because the secondary conductive time only accounts for a part of the cycle, the utilization rate of rectifier transformer is lower than that of ordinary transformer, resulting in larger volume and weight under the same capacity.
Capacity calculation method
The capacity is the average of the apparent power of the primary and secondary sides (equivalent capacity) rather than the single winding capacity of an ordinary transformer, and the difference is significant especially in scenarios such as half-wave rectification.
High short-circuit dynamic stability requirements
Need to strictly meet the short-circuit dynamic power withstand capacity, the design needs to optimize the winding structure and materials to enhance mechanical strength.
III. Application Scenarios and Adaptability
Wide voltage regulation range
For example, in the aluminum electrolysis scenario, the voltage regulation range can be up to 5%~105%, which needs to be realized by tapping or phase-shifting technology.
High efficiency and low noise
Adopting energy-saving design, low noise operation, and supporting overload operation (e.g. 110% voltage, 40ºC environment).
Multi-discipline Adaptability
Applicable to electrochemical industry (electrolytic aluminum, chlor-alkali), power traction (mining locomotive), DC transmission and other scenarios, to meet the high-current, low-voltage demand.
IV. Difference with ordinary transformers
In addition to the above characteristics, rectifier transformers also need to cope with DC side of the load sudden change (such as motorcycle startup), so the impedance design is larger (about 30% higher than the power transformer), the temperature rise limit value is lower to improve stability.