找书：PWM for Power Converters: Principles and Practice

I am looking for the book,I find the book in internet http://www.amazon.com/exec/obidos/ASIN/0471208140/ref=nosim/wileycomasia-20/104-9962730-4835139?SubscriptionId=0J7FS30R0CCMP2S5R0R2&camp=2025&link_code=xm2
But you need to spend 115$ on the book ,I have spent 98$ on Analysis of Electric Machinery and Drive Systems (2nd Edition)

哪位大侠有 电子版！？115$ 很贵的！

再一次请大狭帮助！请上传电子版本！多谢！