ELECTRIC MOTOR CONTROL DEVICE Russian patent published in 2020 - IPC H02P27/08 H02P23/04 H02M7/5395 B60L50/51 B60L15/20 

FIELD: control devices.

SUBSTANCE: group of inventions relates to AC motor control devices. Electric motor control device contains an electronic control module. Electronic control module is configured to switch inverter switching element in control mode with pulse-width modulation, when the modulation degree is less than the first predetermined value, is configured to switch the inverter switching element in the square-wave control mode, when the modulation degree is greater than or equal to the second predetermined value, which exceeds the first predetermined value, and is configured to switch inverter switching element in intermediate control mode when modulation degree exceeds or equals first predetermined value and less than second predetermined value. Intermediate control mode uses a switching pattern in which, in a pulse pattern in square-wave control mode, gap or short pulse having width identical to width of gap is formed according to whether pulse is present or not at the time when phase current passes through zero. Also disclosed is a version of an electric motor control device.

EFFECT: technical result consists in reduction of resonance or vibration when switching control mode.

14 cl, 24 dwg