Experiments show that the motor phase current controlled by this kind of SPWM inverter can be strictly sinusoidal and the running of the motor can remain steady for the ultra low speed range. 实验结果表明,这种SPWM逆变器控制的电机相电流严格正弦,能在超低速下平稳运行。
Deformation resistance of ultra low carbon and low carbon steels at temperature range of 700 1400 ℃, strain rate of 1 × 10 - 2 / s and 3 × 10 - 1 / s have been investigated by an elevated temperature tensile test. 对低碳钢(0.02%C)和超低碳钢(0.002%C)连铸钢坯试样,在1×10-2/s和3×10-1/s的应变速率、700~1400℃温度范围条件下进行拉伸试验。