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Application of reactive sintered silicon carbide products in power electronic devices
- Aug 23, 2018 -

Due to the application of reaction-sintered silicon carbide products to power electronic devices, power electronic devices are playing an increasingly advantageous role in improving power utilization efficiency and miniaturization of power electronic devices. Mainly to improve the efficiency of power utilization, to achieve a reduction in power loss, because reactive silicon carbide products have advantages in reducing on-resistance and reducing switching losses relative to silicon devices.


For example, in an inverter circuit composed of a diode and a switch tube, only the diode material is changed from silicon to reaction-sintered silicon carbide, and the power loss of the inverter can be reduced by about 15 to 30%, if the switch tube material is also replaced by SiC. , the power loss can be reduced by more than half.


It has been proven that power electronic devices fabricated by reacting sintered silicon carbide products have three characteristics that enable the power converter to be miniaturized, higher switching speed, lower loss, and higher operating temperature. The reaction-sintered silicon carbide can be switched at a multiple speed of the silicon device. The higher the switching frequency, the easier it is to achieve miniaturization of energy storage and filtering components such as inductors and capacitors; the reduction of power loss and the reduction of heat generation are correspondingly reduced. Miniaturization of power converters.


In terms of junction temperature, the reaction-sintered silicon carbide can operate at higher junction temperatures and ambient temperatures, thus reducing or eliminating the cooling mechanism of the power converter. Therefore, it can be used in many fields of power electronic device applications, such as transmission systems, power distribution systems, electric locomotives, hybrid vehicles, various industrial motors, photovoltaic inverters, wind power grid-connected inverters, air conditioners and other white goods, servers. And personal computers and so on.