| 摘要 |
PROBLEM TO BE SOLVED: To provide a controller for voltage-type inverter which is capable of limiting torque ripple to a certain value or lower and improving the noise suppression and adhesive quality. SOLUTION: Torque ripple in pulse mode (m) is calculated by a deviation between an ideal magnetic flux vector locus λ1 and an actual magnetic flux vector locus λ. A modulation rate (a) or a frequency f1 of an inverter, for switching pulse mode from a torque ripple limit value and calculated results mentioned above, is obtained, to be stored in advance in a means 3. A means 2 calculates the output frequency f1 or the modulation rate (a) of the inverter, based on a command vector V. A means 4 refers to the data stored in the means 3 to determine a pulse mode (m), according to the frequency f1 or the modulation rate (a) calculated, as mentioned above. A means 5 calculates the output time of respective voltage vectors in the respective pulse modes (m), and the switching element of a voltage-type inverter 7 is driven, according to this voltage vector output time to control a load motor 7. |
