Title:
CONTROL APPARATUS AND CONTROL METHOD FOR ROTARY MACHINE
Document Type and Number:
Japanese Patent JP2018174655
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a control apparatus for rotary machine, capable of achieving suppression in an error between a control operation amount to be controlled and a true value to be essentially controlled even when current control is under a current change or includes a harmonic wave.SOLUTION: The control apparatus executes the following steps: sampling an AC current of each of three phases in 60° periodicity N times; determining an addition average of d-axis and q-axis currents obtained by 3-phase/2-phase converting the sampled AC currents; calculating an effective value from the addition average to determine a current detection effective value (1)-(8); calculating a current command effective value on the basis of a torque command and a rotational speed; applying PI control to a deviation between the current detection effective value and the current command effective value to generate a voltage command corresponding to the deviation (9)-(16); calculating a developed formula of fourier series based on the voltage command to determine a pulse string phase; creating a phase voltage command of three phases on the basis of pulse string information and a current phase command (18); and on-off controlling a switching element of an inverter using the created command.SELECTED DRAWING: Figure 2
Inventors:
SAWAKI YUTO
Application Number:
JP2017071384A
Publication Date:
November 08, 2018
Filing Date:
March 31, 2017
Export Citation:
Assignee:
MEIDENSHA ELECTRIC MFG CO LTD
International Classes:
H02P21/00; H02M7/48; H02P27/08
Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Uzawa Hidehisa
Tomioka Kiyoshi
Uzawa Hidehisa