A
system to control an asynchronous tri-phase motor where said
system comprises: at least one filter directly coupled to the current of the Alternative Current (AC) line; a
rectifier which rectifies the
line current, a doubler which reduces the curl, elevates the
voltage and delivers a
voltage in
Direct Current, a braking resistance which helps to dissipate energy when the
system is in braking mode, a shunt resistance, which helps to measure the current which flows from the V-line between the doubler and the IGBT module, a source, which adapts the
voltage which the
microcontroller consumes and peripheries (operational amplifiers, detectors, etc.), a line
regulator to remove curls and line
noise, a
microcontroller to process, admit and emit control signals, a potential module which emits a PWM
train pulse with a frequency determined by the
microcontroller towards the IGBT module when the microcontroller indicates such, an IGBT module, which receives the PWM pulse
train adapting and
coupling them to an
H bridge, to thus allow the flow of
high voltage in DC emanating from the doubler towards the
electric motor, a retro-feeding line towards the microcontroller to measure current, a velocity
detector coupled mechanically to the motor and which sends a
signal or pulse
train towards the microcontroller; as well as the acceleration or braking methods consistent in the measurement of the slip S of said tri-phase motor.