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做一个2000W的半桥电源,驱动遇到问题了,波形有问题,求大神帮忙

求大神指教:

1、上图是本人在做一个2000W的半桥电源,DSP输出的PWM波,请问波形是否正确?占空比如何变化范围如何?要注意那些?
2、上图的PWM1_DSP和PWM2_DSP的信号是图一的波形,经过图二电路后,PL相对SW,PN相对GND_310V的波形为下图,请问下图波形是否正确?
3、为什么蓝色波形顶端会被削掉或者是有尖峰?黄色波形上升沿和下降沿会有小电平?如何解决?