Mobile power converting apparatus

A mobile power converting apparatus comprises: a machine body and a moving means. The machine body includes a power storing device, a motor-generator set and a machine body power output terminal which is electrically connected to a load. The motor-generator set includes a motor, a generator and a kinetic energy transferring member. The motor is electrically connected to the power storing device. The kinetic energy transferring member is kinetically connected between the motor and the generator. The revolving speed of the motor is faster than the revolving speed of the generator. The generator has a generator output terminal which is electrically connected to the machine body power output terminal and the power storing device respectively in order to convert the necessary power of the load, and transfer the necessary power to the load by way of the generator output terminal. The moving means, which is disposed beneath the machine body, includes a caster so that the machine body can move by way of the moving me