Title:
CONTROL DEVICE FOR ROTARY MACHINE
Document Type and Number:
Japanese Patent JP2018050418
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a control device for a rotary machine that reduces a positional error due to unbalance between systems in position sensor-less control of the rotary machine having a plurality of pairs of multi-phase coils.SOLUTION: A motor control device 101 controls supply of power to a three-phase two-system motor 802 under position sensor-less control. A system sum induction voltage estimation unit 41 estimates a system sum induction voltage ew, which is the sum of the extended induction voltages of the two systems, on the basis of a voltage sum of vw and a current sum iw. A system difference induction voltage estimation unit 43 estimates a system difference induction voltage es, which is a difference between the extended induction voltages of the two systems, on the basis of a voltage difference vand a current difference is. A magnetic pole position estimation unit 56 estimates the magnetic position θγ of a rotor on the basis of one of values, selected from the system sum induction voltage ew, a value (ew+es) obtained by adding the system difference induction voltage to the system sum induction voltage, and a (ew-es) obtained by subtracting the system difference induction voltage from the system sum induction voltage such that a positional error Δθ is minimum.SELECTED DRAWING: Figure 1
Inventors:
JUNG SUK-HWA
Application Number:
JP2016185407A
Publication Date:
March 29, 2018
Filing Date:
September 23, 2016
Export Citation:
Assignee:
DENSO CORP
International Classes:
H02P6/182
Attorney, Agent or Firm:
Masaki Hattori
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