System for controlling controlled variable of rotary machine

摘要

In a system for controlling a controlled variable of a rotary machine having plural-phase input terminals of the rotary machine in which plural-phase AC power is applied from an AC power applying module to the input terminals, a command-voltage setting module sets, based on a request value for the controlled variable, plural-phase AC command voltages for the plural-phase AC power as a feedforward manipulated variable. A current obtaining module obtains plural-phase AC currents flowing in the respective plural-phase input terminals of the rotary machine. An amplitude correcting module corrects the amplitude of at least one of the plural-phase AC command voltages based on the magnitudes of the plural-phase AC currents.

主权项

1. A system for controlling a controlled variable of a rotary machine having plural-phase input terminals of the rotary machine in which plural-phase AC power is applied from an AC power applying module to the plural-phase input terminals, the system comprising:
a command-voltage setting module configured to set, based on a request value for the controlled variable, plural-phase AC command voltages for the plural-phase AC power as a feedforward manipulated variable; a current obtaining module configured to obtain plural-phase AC currents flowing in the respective plural-phase input terminals of the rotary machine; and an amplitude correcting module configured to correct an amplitude of at least one of the plural-phase AC command voltages based on magnitudes of the plural-phase AC currents obtained by the current obtaining module, wherein the amplitude correcting module further comprises: a command-current calculating module configured to calculate plural-phase AC command currents for the plural-phase input terminals of the rotary machine as a function of the request value of the controlled variable; and a correction value calculating module configured to calculate a correction value that corrects the amplitude of the at least one of the plural-phase AC command voltages such that the magnitudes of the plural-phase AC currents match with those of the respective plural-phase AC command currents; wherein the correction value calculating module further comprises: a manipulated-variable calculating module configured to calculate a manipulated variable for the at least one of the plural-phase AC command voltages as a function of a deviation between a magnitude of each of the plural-phase AC currents and a magnitude of a corresponding one of the plural-phase AC command currents; and an adding module configured to add 1 to the manipulated variable for the at least one of the plural-phase AC command voltages, the amplitude correcting module further comprising: a multiplying module configured to multiply the at least one of the plural-phase AC command voltages by a result of the addition by the adding module to thereby correct the amplitude of the at least one of the plural-phase AC command voltages.