dexterbot80
Member level 1
Hello,
I want to control the speed of a woodcutter that is equipped with an asynchronous three-phase motor 400V 6000 RPM 6KW.
From the searches I came to the conclusion that a VFD would successfully solve my problem so I decided to build one.
**broken link removed** seems to me the simplest solution for adjusting the frequency - I tested this circuit and obtained a three-phase sinusoidal signal.
This is the control circuit
![CONTROLL BOARD.png CONTROLL BOARD.png](https://www.edaboard.com/data/attachments/82/82661-7f1cb46c9518a19f65a0ea002ebc298b.jpg)
This is the gate driver circuit
![GATE DRIVE.png GATE DRIVE.png](https://www.edaboard.com/data/attachments/82/82662-2e29be69dc138851077d12e84e74ef12.jpg)
Please help me to better understand how the control circuit works and tell me if the electronic circuit is correct.
Basically, I have to get 6 Hi / Lo signals that will command the three-phase IGBT bridge.
Thank you
I want to control the speed of a woodcutter that is equipped with an asynchronous three-phase motor 400V 6000 RPM 6KW.
From the searches I came to the conclusion that a VFD would successfully solve my problem so I decided to build one.
**broken link removed** seems to me the simplest solution for adjusting the frequency - I tested this circuit and obtained a three-phase sinusoidal signal.
This is the control circuit
![CONTROLL BOARD.png CONTROLL BOARD.png](https://www.edaboard.com/data/attachments/82/82661-7f1cb46c9518a19f65a0ea002ebc298b.jpg)
This is the gate driver circuit
![GATE DRIVE.png GATE DRIVE.png](https://www.edaboard.com/data/attachments/82/82662-2e29be69dc138851077d12e84e74ef12.jpg)
Please help me to better understand how the control circuit works and tell me if the electronic circuit is correct.
Basically, I have to get 6 Hi / Lo signals that will command the three-phase IGBT bridge.
Thank you