Domestic electronic transformer development way: more links go hand in hand

      Now, the domestic is developing various aluminum wire used in power electronic transformer. Some companies have developed copper clad aluminum wire, copper wire in the outer layer, 15% of the area, the total weight is 3.63 g/cm3, consider table effect and proximity effect, the resistivity of copper clad aluminum wire is smaller than pure aluminium wire, and the cost is not much, is a kind of give full play to the effect of copper and aluminum composite materials.

      Another notable trend in recent years, is to choose higher temperature index, high heat resistance level of 180 polyester imide QZY polyimide QYZ enameled wire, enameled wire and 220 wire allows the increase of current density, wire diameter reduction, reduced the volume of copper, iron core window area reducing, with iron content also reduced at the same time, can reduce the overall cost. Especially in high frequency low power requirement of small size power transformer, using better heat resistance of enameled wire, can show more technical and economic benefits.

      Contained in the power supply and power electronic technology of ac voltage transformation technology, is a kind of "pure" electronic transformer, also can turn low pressure to high pressure booster transform, or high pressure into low pressure step-down transform, the main method is to use frequency of power electronic technology to improve the power conversion, to narrow the volume of a circuit of transformer and inductor, not cancel the transformer and inductor. Before, for this kind of power electronic circuits and electronic transformer, the method of no cause enough attention.

      In recent years, as to reduce the input and output harmonic in power system, improve the network side of the power factor, to realize "green transformation" rising, both at home and abroad to carry out the "power electronic transformer" research, the research and development emerged. Study how to use the power electronic technology to transform and power control, use the power electronic transformer instead of the traditional electromagnetic type distribution transformer. Now single phase transformation and phase transformation circuit in the form, this kind of power electronic transformer not only can be used for high voltage large current electric field, can also be used for high pressure or low pressure low current field, such as some of the high-voltage power generator and small power source, etc.

      Engages in research, development and production of electronic transformer unit in our country, which has more than 2000, including state-owned, private and foreign-funded enterprises. The world's largest electronic transformer manufacturers systems, companies in the United States and the world's largest soft magnetic ferrite manufacturers in Japan TDK companies have production base in our country. Many of the world's electronic transformer technology, advanced production technology and product are come together in our country. Faced with such a variety of platforms, technology exchange is promising.