日立公司已开发出碳化硅混合型逆变器,用于1.5kV接触网供电的电动车组。该逆变器采用了额定电压为3.3kV的混合型模块,大小约为标准硅模块的。新产品的电路结构更加简单,体积也更小。通过结合碳化硅二极管和硅绝缘栅双极型晶体管(IGBT),混合模块使二者的功率损耗均降到最低。与现有产品相比,质量较轻的无油电容器也使总质量降低了40%左右。日立公司还开发了软门控制专利技术,可消除 Hitachi has developed a silicon carbide hybrid inverter for 1.5kV catenary-powered electric train. The inverter uses a mixed-mode module rated at 3.3kV and is about the size of a standard silicon module. The new product circuit structure is simpler, smaller size. By combining silicon carbide diodes and silicon-insulated gate bipolar transistors (IGBTs), the hybrid module minimizes both power losses. Compared with the existing products, lighter quality oil-free capacitors also reduce the total mass by about 40%. Hitachi has also developed a patented soft gate control technology that eliminates it