Traditional grid-connected inverter employs low frequency output isolation transformer. It increases weight and cost.
传统的并网逆变器输出端采用工频变压器，体积重量大，成本高。
So the transformer core material is required to be the one with properties of low losses at high frequency, high dynamic permeability, high saturation induction and low remanence.
要求变压器铁芯具有低的高频损耗，高动态磁导率，高饱和磁感应强度和低的剩磁比。
This article has mainly discussed the characteristics of the regulation system of frequency transformer in low-frequency areas and some problems and proposed some improvements.
文章着重分析了变频器调速系统在低频区域的特性，阐述了该系统在低频区存在的一些问题，并提出相应的改善方法。
By changing frequency, using an intermediate-frequency transformer instead of a low-frequency transformer can make the arc starter small, light and reliable.
利用变频方法，以中频变压器取代低频变压器，从而使引弧器具有体积小、重量轻和引弧可靠的特点。
By changing frequency, using an intermediate-frequency transformer instead of a low-frequency transformer can make the arc starter small, light and reliable.
利用变频方法，以中频变压器取代低频变压器，从而使引弧器具有体积小、重量轻和引弧可靠的特点。
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