초록 ▼

A method and apparatus for compensating a voltage error caused by a dead time of a motor driving inverter outputs command current, generates command voltage by proportionally integrating the command current on a basis of a starting point in which a polarity of current being applied to a motor is var

A method and apparatus for compensating a voltage error caused by a dead time of a motor driving inverter outputs command current, generates command voltage by proportionally integrating the command current on a basis of a starting point in which a polarity of current being applied to a motor is varied, converts the command voltage to a control signal in a pulse width modulator, and transmits the command voltage to the inverter, whereby a current distortion occurring around a zero current becomes minimized and a torque ripple becomes decreased in accordance therewith.

대표청구항 ▼

[ What is claimed is:] [1.] A method for compensating a voltage error caused by a dead time of a motor driving inverter, comprising:a first step for subtracting/adding a dead time compensating voltage from/to an inverter command voltage, according to inverter output current applied from the inverter

[ What is claimed is:] [1.] A method for compensating a voltage error caused by a dead time of a motor driving inverter, comprising:a first step for subtracting/adding a dead time compensating voltage from/to an inverter command voltage, according to inverter output current applied from the inverter to a motor and for thereby outputting a new command voltage;a second step for obtaining a command current if the detected output current exists inside a hysteresis band having a predetermined width nearby the zero current;a third step for subtracting the output current value from the command current value, proportionally integrating the subtracted value, and outputting a new compensating voltage; anda fourth step for adding the new compensation voltage to the new command voltage obtained in the first step, and carrying out a pulse width modulation of the added value.