| 摘要 |
A unit for controlling the synchronization of a complex machine during power failures or losses, wherein the machine comprises a plurality of motorized devices (A1, A2, A3) for the movement and control of the various components, and wherein each device is connected to the power supply bus by virtue of a speed converter (C1, C2, C3), each device having a known flywheel mass (m1, m2, m3) and having, in the steady state, a speed that is synchronized with that of the other devices. The unit includes: a system (2) for recognizing an actual grid power failure; systems for measuring the speed and the current of the various devices; a computing device (3) for calculating the moments of inertia of the most significant flywheel masses, of their respective speeds and absorbed currents; a circuit (5) for comparing the voltage of the supply bus with the last value of the voltage detected before the grid power failure, suitable to generate a first error signal; a closed-loop regulator circuit (7) for processing the first error signal so as to generate a second signal in output. The second signal can be sent to a multiplier operator (X1, X2, X3) that is associated with each converter to control the gradual and synchronous deceleration of all the devices, converting part of the kinetic energy of the most significant flywheel masses into electric power to supply the system. |
