| 摘要 |
PROBLEM TO BE SOLVED: To provide a phase compensation device of an inverter output voltage.SOLUTION: In a system including an inverter for supplying a voltage to a motor, a control unit for providing a command voltage to the inverter, and a voltage detection unit for detecting an output voltage of the inverter, the phase compensation device for correcting a phase of the output voltage of the inverter includes: a first determination unit which determines a magnitude of the command voltage; a second determination unit which determines a magnitude of the inverter output voltage; a first normalization unit which normalizes the command voltage by the output of the first determination unit to calculate a phase of the command voltage by trigonometric function; a first conversion unit which uses the phase of the command voltage in a form of trigonometric function to convert the inverter output voltage to a system of rotating axis; a second normalization unit which normalizes the inverter output voltage converted to the system of rotating axis, with the inverter output voltage outputted from the second determination unit and calculates a phase error between the inverter output voltage and the command voltage by trigonometric function; and a second conversion unit which uses the phase error in a form of trigonometric function to convert the inverter output voltage to a system of rotating axis and outputs a compensation voltage. |
