METHOD OF START-UP OF A SWITCHED RELUCTANCE MOTOR Russian patent published in 2018 - IPC H02P1/46 H02P1/04 H02P25/08 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering and can be used to control the start-up of a switched reluctance motor. Method of starting a switched reluctance motor with a power from 100 to 350 W / 24 V DC includes the supply of DC pulses, and in a stranded stator with windings connected to the board, on which the control system and the inverter are located, the stranded rotor is disposed, and the start of the electric motor is carried out by feeding several series of DC pulses successively increasing in duration and magnitude to the stator windings, firstly, a series of DC pulses q₁ is fed with duration t₁ equal to t₁=(60/N_nom)*z₁, where N_nom – rated rotational speed of the rotor, z₁ – coefficient of proportionality; with the value of the current pulse through a given phase of the stator of the electric motor equal to I₁=k₁*I_nom, where I_nom – rated current of the motor, equal to the quotient of the motor power divided by the voltage specified in the data sheet for the motor, k₁ – coefficient of proportionality, then, after the rotor achieves the rotation speed N₁=y₁*N_nom, a second series of DC pulses q₂ is formed with duration t₂ and the value of the current pulse equal to I₂=k₂*I_nom, then, after the rotor achieves the rotation speed equal to N₂=y₂*N_nom, is reached, a third series of DC pulses q₃ is formed with duration t₃ and the value of the current pulse equal to I₃=k₃*I_nom, and after the motor rotor reaches the rotational speed N₃=y₃*N_nom, DC equal to I_nom is supplied, while the start-up process is interrupted at any time when a signal from the rotor position sensor is received about the physical rotation of the rotor and when the above rotor speed is reached, and at motor power from 100 to 150 W, the value of the proportionality coefficients is: k₁, y₁, z₁ – from 0.1 to 0.15, k₂, y₂, z₂ – from 0.2 to 0.35, k₃, y₃, z₃ – from 0.4 to 0.5, at motor power from 150 to 250 W, the value of the proportionality coefficients is equal to: k₁, y₁, z₁ – from 0.2 to 0.25, k₂, y₂, z₂ – from 0.3 to 0.45, k₃, y₃, z₃ – from 0.6 to 0.7, at motor power from 250 to 350 W, the value of the proportionality coefficients is equal to: k₁, y₁, z₁ – from 0.3 to 0.35, k₂, y₂, z₂ – from 0.4 to 0.65, k₃, y₃, z₃ – from 0.8 to 1.0.

EFFECT: technical result is a decrease in the magnitude of the starting currents, increase in the reliability and durability of the power semiconductor control unit and increase in the service life of the electric motor due to the exclusion of a large shock load on the rotor of the electric motor, while ensuring an increase in the reliability of start-up and shutdown of the electric motor when the average value of switching currents in operation decreases.

1 cl, 1 dwg