Title:
VECTOR CONTROL DEVICE, INVERTER EMBEDDING SAME, AND INVERTER-MOTOR SET DEVICE EMBEDDING SAME
Document Type and Number:
WIPO Patent Application WO/2015/156003
Kind Code:
A1
Abstract:
Provided is a vector control device that prevents a situation requiring a restart from occurring and can perform a stable torque control operation even when DC voltage fluctuation occurs. A voltage modulation factor calculation unit (11a) of a command calculation unit (11) calculates a voltage modulation factor supplied to a motor, and when the voltage modulation factor (Kh) exceeds a first modulation factor command (Kh1*), a field-weakening control is performed by the operation of a d-axis current modification calculation unit (11b) of the command calculation unit (11). When the voltage modulation factor (Kh) exceeds a second modulation factor command (Kh2*), a torque command modification calculation unit (11c) of the command calculation unit (11) controls a torque command so that the voltage modulation factor (Kh) does not exceed the second modulation factor command (Kh2*). This makes it possible to perform an appropriate field-weakening control and avoid a situation in which an overcurrent trip occurs and a restart is required due to DC voltage fluctuation.
Inventors:
TOBARI KAZUAKI (JP)
KURAHASHI MITSURU (JP)
KURAHASHI MITSURU (JP)
Application Number:
PCT/JP2015/050191
Publication Date:
October 15, 2015
Filing Date:
January 06, 2015
Export Citation:
Assignee:
HITACHI IND EQUIPMENT SYS (JP)
International Classes:
H02P21/00; H02P27/04
Foreign References:
JP2009268304A | 2009-11-12 | |||
JP2005110354A | 2005-04-21 | |||
JP2012065463A | 2012-03-29 | |||
JP2004101151A | 2004-04-02 | |||
JP2000341990A | 2000-12-08 |
Attorney, Agent or Firm:
KAICHI IP (JP)
Patent business corporation development-of-knowledge international patent firm (JP)
Patent business corporation development-of-knowledge international patent firm (JP)
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