In this paper, a new drive method for the regeneration of a system with flywheel batteries and mechanical loads is proposed. The system consists of more than two motors and their symmetric driving circuits. In order to arbitrarily accelerate the motors with mechanical loads, we exploit the energy stored in the flywheel batteries. Conversely, to arbitrarily decelerate the motors with mechanical loads, we carefully control and accelerate the motor connected to the flywheel batteries. A design of the driving circuits and a driving algorithm are proposed. Experimental results illustrate that the energy flow can be arbitrarily controlled between flywheel batteries and mechanical loads.
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