Hyundai Motor Company

Kia Motors Corporation

Gu-Bae Kang

Jae-sang Lim

Young-Un Kim

Hyung-Bin Ihm

A method for preventing takeoff of a motor velocity of a hybrid electric vehicle, may include checking whether an engine clutch is disengaged while an engine and a motor are simultaneously driven, checking whether a command of motor torque is zero when the engine clutch is disengaged, and checking whether the motor velocity is normal while the command of the motor torque is zero, wherein when the motor velocity abnormally increases as a result of checking whether the motor velocity is normal, the motor torque is corrected to be zero.

Method for preventing takeoff of motor velocity for hybrid electric vehicle

A system for controlling a permanent magnet synchronous motor calculates fundamental a d-axis (or q-axis) voltage command based on a difference between a d-axis (or q-axis) current command and a d-axis (or q-axis) current feedback signal, calculates a harmonic suppression d-axis (or q-axis) voltage command used to suppress at least one higher-order harmonic current component included in a harmonic current component which is calculated based on the differences between the current feedback signals and the current commands, and calculates a d-axis (or q-axis) voltage command by adding the fundamental d-axis (or q-axis) voltage command and the harmonic suppression d-axis (or q-axis) voltage command. The d-axis and q-axis voltage commands are transformed into three-phase voltage commands, which are converted into a drive voltage for driving the permanent magnet synchronous motor. As a result, the harmonic current components are significantly suppressed and the motor's overall performance is improved.

Growing community of inventors

Yongin-si, South Korea

Gu-Bae Kang