Motor arrangement system of endurable and energy-saving electric vehicle

A motor arrangement system of an endurable and energy-saving electric vehicle, adapted to being connected to a drive gearbox of an electric vehicle, comprising:

• at least one motor unit, which comprises a number of motor devices and a speed-change device, each of the motor devices comprising a motor spindle to output power, the number of the motor devices being defined as N, the speed-change device comprising a speed-change gear set connected to the motor spindles and an output shaft connectable to the speed-change gear set and the drive gearbox, the power of each of the motor spindles being transmitted through he speed-change gear set and the output shaft to the drive gearbox;
• a detection unit, which comprises a rotational speed detector that is arranged to correspond to the output shaft and detects a rotational speed of the output shaft in order to output a rotational speed signal, and an operation detector that detects horsepower of the output shaft or an electric current of the motor devices in order to output an operation signal;
• and
• a control unit, which electrically connected with the motor devices and the detection unit, and is operable to switch supply of electric power to one to N of the motor devices according to the rotational speed signal and the operation signal.