Performance evaluation of transformer
Writer： Hengfeng you electric Time：2023-04-14 views：times
Performance evaluation of transformer after the winding of transformer design, several tests are always required to preliminarily evaluate whether its characteristics meet the requirements. The following are the necessary evaluation items.
1. Magnetizing inductance
Since this inductor is used as the resonant inductor, its value is closely related to the working frequency, so it is very important.
2. Bandwidth
With appropriate bandwidth, the transmission loss of signal can be minimized.
3. Polarity
When winding transformer, polarity is another very important factor. Use signal generator and oscilloscope to measure the number of turns than polarity.
4. Peak value of operating magnetic flux density
The main purpose of this value is to ensure that the transformer will not be saturated under any circumstances. First calculate and then check the characteristics of the material to confirm whether it will be saturated. Using oscilloscope current probe to generate power amplifier is also a method to know the dynamic B-11 curve.
5. Efficiency
The efficiency of transformer is defined as the ratio of output power to input power. The input power is equivalent to the sum of output power loss. Since the loss will be related to temperature rise, the higher the efficiency, the simpler the safety consideration. Generally, the efficiency of high-voltage transformer should be at least more than 95%.
6. Temperature rise
According to different product marketing markets, such as UL in the United States and VDE in Europe, there are specific needs.
