A three-phase permanent magnet generator voltage and speed cascade control device and control method
By adopting independent voltage regulation and energy consumption branch separation control in the three-phase permanent magnet power generation system, and combining voltage closed-loop and speed outer loop-current inner loop cascade control, the mutual interference problem of generator voltage and speed regulation is solved, realizing stable power supply and speed controllability within a wide speed and wide bus voltage range, and improving the dynamic stability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Filing Date
- 2026-04-15
- Publication Date
- 2026-07-17
AI Technical Summary
In existing three-phase permanent magnet generator systems, the amplitude and frequency of the generator terminal voltage fluctuate significantly with the change of speed. The input torque has random disturbances and sudden changes in operating conditions, which makes it easy for the DC bus voltage to rise. It is difficult to achieve active regulation of the generator electromagnetic torque/speed without sacrificing power supply stability, and the control mutual interference is serious.
The voltage regulation branch and the energy consumption branch are implemented by independent buck-boost DC/DC actuators. Voltage control and speed/torque control are separated at the actuator circuit level. The voltage regulation branch adopts a voltage closed loop, and the energy consumption branch adopts a speed outer loop-current inner loop cascaded control. Priority limiting logic is set to reduce interference.
It achieves stable power supply and controllable speed over a wide range of speeds and bus voltages, with high dynamic stability, avoiding mutual interference between controls and improving the stability and safety of the system.
Smart Images
Figure CN122419282A_ABST