Patent ID: 8772984

Claim:
A fitness equipment energy regenerating and saving system performing an electrical power exchange without utilizing an energy storage device, comprising: a bidirectional power converter having a plurality of power transistors, wherein one end of the bidirectional power converter is electrically and directly connected to an electrical grid; a bidirectional power drive, wherein one end of the bidirectional power drive is electrically and directly connected to the other end of the bidirectional power converter; a generator electrically and directly connected to the other end of the bidirectional power drive for linking up a fitness equipment, the generator can be driven by the bidirectional power drive and performs as a motor; and an energy managing circuit electrically connected to the bidirectional power converter, the bidirectional power drive and the generator for determining whether the generator is operated in a generator mode or a motor mode; wherein the energy managing circuit activates the bidirectional power converter so as to enable the bidirectional power drive to feedback the power generated by the generator to the electrical grid directly through the bidirectional power converter when the generator is operated in the generator mode; wherein the energy managing circuit sets the bidirectional power converter so as to enable the bidirectional power drive to obtain the power required for driving from the electrical grid directly through the bidirectional power converter when the generator is operated in the motor mode.