Power Frequency Inverter and High Frequency Inverter Difference
There are many differences between power frequency inverter and high requency inverter,the details as follows:
1.Working principle
Power frequency inverter: First,it converts DC power into power frequency low-voltage AC power,and then boosts it to 220V,50Hz AC power for load use through a power frequency transformer,the working frequency of the rectifier and transformer is 50Hz at the power frequency.
By using high-frequency DC/AC conversion technology,low-voltage DC power is inverted into high-frequency low-voltage AC power,which is then boosted by a high-frequency transformer and rectified by a high-frequency rectification and filtering circuit into high-voltage DC power usually above 300V,finally,220V AC power is obtained through a power frequency inverter circuit for load use.
2.Performance characteristics
Volume and weight: Due to the use of power frequency transformers,the volume and weight of power frequency inverters are relatively large at the same power,the high-frequency inverter uses small and lightweight high-frequency magnetic core materials with high power density, small size,and light weight.
Efficiency: High frequency have a high switching frequency,fast switching speed of electronic components,and high utilization rate,the conversion efficiency can usually reach over 90%,the frequency of the power frequency is low,the switching speed of the components is slow,the switching loss is large,and the conversion efficiency is generally around 80%.
Load capacity: The power frequency has strong load capacity,especially good adaptability to impulse loads,and can suppress high-order harmonic components in the waveform,high frequency inverters cannot handle inductive loads at full capacity,resulting in relatively poor overload capacity.
Electromagnetic interference: High frequency operate at high frequencies and generate significant electromagnetic interference,the working frequency of the inverter is low,and the electromagnetic interference generated is relatively small.
3.Cost
Power frequency inverter: The production and manufacturing process is relatively mature,and the components used are relatively ordinary,with relatively low cost and relatively cheap price.
High frequency inverter: Due to the use of expensive electronic components, high production process requirements,and high manufacturing costs,the price is usually higher than that of power frequency inverters.
4.Applicable scenarios
Power frequency: suitable for situations where high reliability is required,space and weight requirements are not strict,and the load is mainly inductive or requires impact loads,such as traditional industrial motor drives,high-power UPS,DC power supply and other fields.
High frequency: suitable for occasions with high requirements for power quality, strict requirements for volume and weight,and mainly resistive or capacitive loads,such as solar power generation, wind power generation,Solar systems,small electronic devices, vehicle electronic devices,etc.