Reducing commutation torque ripple of reaction flywheel motor by synergetic control

In order to solve the problem of reaction flywheel motor torque ripple effecting satellite attitude control accuracy, the flywheel motor commutation torque ripple minimization conditions are derived by adopting the analytical method of permanent magnet brushless DC motor induced electromotive force, phase current and electromagnetic torque, and a highly dynamic synergetic control approach is proposed based on the commutation torque ripple minimum conditions. The approach is used to restrain commutation torque ripple of reaction flywheel under different operating conditions. The experiment results show that the commutation torque ripple decreases by 12% in the electrical mode, and the commutation torque ripple is reduced by 90% or more in controlled braking and reverse braking modes, thus verifying feasibility and effectiveness of the control approach.