Title:
直接形の電力変換装置
Document Type and Number:
Japanese Patent JP6849000
Kind Code:
B2
Abstract:
The sign fdc is a frequency twice as high as a frequency of a single-phase AC power supply(20); fL is a frequency of the periodic load fluctuations; and tb=1/|fdc―n×fL|, where n is a positive integer that maximizes tb, in a half period of power supply during a period of tb, the half period of power supply including a timing at which a peak of a fundamental wave of load torque and a peak of an absolute value of a power supply voltage substantially coincide with each other, the control unit(40) controls the switching elements (Su, Sv, Sw, Sx, Sy, Sz) so that two or more local maximum points appear in the half period of power supply, in a waveform obtained by combining a second harmonic, a fourth harmonic, and a sixth harmonic of a power supply frequency contained in a waveform of an absolute value of a motor current vector.
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Inventors:
Daisuke Tree
Nobuo Hayashi
Takuro Ogawa
Morimitsu Sekimoto
Nobuo Hayashi
Takuro Ogawa
Morimitsu Sekimoto
Application Number:
JP2019046890A
Publication Date:
March 24, 2021
Filing Date:
March 14, 2019
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
H02P21/05; H02M7/48; H02P21/22; H02P27/06
Domestic Patent References:
| JP2012165631A | ||||
| JP2017103910A | ||||
| JP2007116862A | ||||
| JP2013135568A |
Foreign References:
| US20020074969 |
Attorney, Agent or Firm:
Maeda patent office