The inverter uses opetimal phase angle control scheme to suppress the surge voltage during the commutation of current.
为了抑制电流换相期间的浪涌电压，逆变器采用最佳相角控制。
The extinction angle of the DC converter, which is usually used to study the commutation failure of the DC inverter, is an important parameter in the DC transmittal system.
直流换流器熄弧角是直流输电系统的重要电气量，常被用于判断直流输电系统逆变器的换相失败。
Constructivism sets a new Angle of viewing teaching and learning, it provides an important direction of the teaching of complex variables and integral commutation.
建构主义教学观为复变函数与积分变换的教学提供了重要的指导意义。
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