然而，逆变器输出的PWM(脉冲宽度调制)连续高压脉冲的上升沿很陡、频率很高，导致在脉冲电压下牵引电机绝缘过早失效。
However, Pulse Width Modulation (PWM) which was input from inverter is characterized by steep rising edge and high frequency, resulting in the too early failure of motor insulation.
立面：大厅包括一个高度绝缘的模块化幕墙系统，它在两个不同的剖面宽度上发挥作用。
Facade. The hall consists of a highly insulated modular facade system, which plays with two different profile widths.
立面：大厅包括一个高度绝缘的模块化幕墙系统，它在两个不同的剖面宽度上发挥作用。
Facade. The hall consists of a highly insulated modular facade system, which plays with two different profile widths.
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