How does the full control flow control the on and off of the switch tube to obtain the phase difference between voltage and current?

乱世煮酒论天下

How does the full control flow control the on and off of the switch tube to obtain the phase difference between voltage and current? [Copy link]

In full-controlled rectification, you can set the voltage mode or the power factor mode. How does the switch tube control the on and off of the switch tube according to the detected target value to obtain the set value? What is the specific process of this control?

bmahu001

Can be detected with a special chip

乱世煮酒论天下

bmahu001 posted on 2024-4-29 17:00 It can be detected with a special chip

Can you elaborate on this? Take the voltage mode as an example. The DC bus voltage after rectification is set to 600V, but after three-phase uncontrolled rectification, it is only about 550V. At this time, the switch tube needs to be turned on and off to generate voltage. I don't quite understand this process. How can I control the conduction of the switch tube and combine it with the PWM wave to make the bus voltage reach the setting, and the output power factor can also reach 1?