Abstract: A motor-driving apparatus for driving a motor having a plurality of windings respectively corresponding to a plurality of phases is provided. The motor-driving apparatus includes a first inverter having a plurality of first switching devices and connected to first ends of the plurality of windings and a second inverter having a plurality of second switching devices and connected to second ends of the plurality of windings. A third switching device is configured to selectively connect and disconnect points at which a number of turns of each of the windings is divided in a preset ratio. A controller is configured to adjust an on/off state of the first to third switching devices based on required output of the motor.

Abstract: The present disclosure relates to a method for preparing a Gynostemma pentaphyllum leaf extract, a Gynostemma pentaphyllum leaf extract prepared by the method, and a composition for improving exercise performance capacity containing the same as an active ingredient. The Gynostemma pentaphyllum leaf extract according to the present disclosure exhibits superior effect of improving exercise performance capacity and enhancing muscle strength, endurance and physical strength. In addition, the Gynostemma pentaphyllum leaf extract according to the present disclosure has the efficacy of increasing AMPK activity, facilitating beta oxidation and facilitating glucose uptake and, thus, has superior effect of reducing body weight and body fat and preventing, alleviating or treating diabetes. Because the composition of the present disclosure is derived from a natural product, it can be used usefully and safely for drugs, foods, etc. without side effects.