Abstract: Aiming at the problem that the electromagnetic force dynamically tracks the axial gas separation force in the scroll machine under variable working conditions, a self-adaptive parameter electromagnetic dynamic tracking method with full speed range was proposed. When offline, a database of optimal advance steps related to speed or frequency was established in advance; When online, the rotational speed signal of the rotary transformer was fed back in real-time, and the optimal advance quantity corresponding to the rotational speed in the database was adaptively selected, and then the electromagnetic force tracking hysteresis was further compensated in advance, the fast and dynamic balance of axial gas separation force was realized. An electromagnetic control simulation experiment platform was built for experimental testing. The experimental results show that the method can effectively balance the axial gas separation force of the scroll machine under different rotating speed conditions. It provides a useful reference for the dynamic balance control of the axial gas separation force in the scroll machine, especially the high-pressure scroll machine.

Key words: vortex machine; axial force; electromagnetic dynamic balance; full speed range; adaptive