Title:
RF BAND POWER SUPPLY DEVICE AND PULSE WIDTH MODULATION CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2023/032419
Kind Code:
A1
Abstract:
A pulse width modulation control according to the present invention is performed such that, when changing a modulation rate when a sinusoidal wave is used as a waveform of a modulation wave, the modulation rate is continuously changed from a typical modulation region to an overmodulation region, and, in switching between the typical modulation region and the overmodulation region, the modulation rate in the typical modulation region is not discontinuous with the modulation rate in the overmodulation region. In the overmodulation region, limiting the modulation rate α prevents a jump phenomenon in pulse width from occurring and the continuity of the pulse width from disappearing due to the jump phenomenon. The upper limit αupper of the modulation rate α is a threshold at which the pulse width of a PWM pulse signal jumps to a duty ratio of 50%, and limits the modulation rate α to less than the threshold.
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Inventors:
YUZURIHARA ITSUO (JP)
YONEYAMA TOMOHIRO (JP)
KOBAYASHI SHOHEI (JP)
HOSOYAMADA YU (JP)
YONEYAMA TOMOHIRO (JP)
KOBAYASHI SHOHEI (JP)
HOSOYAMADA YU (JP)
Application Number:
PCT/JP2022/024629
Publication Date:
March 09, 2023
Filing Date:
June 21, 2022
Export Citation:
Assignee:
KYOSAN ELECTRIC MFG (JP)
International Classes:
H02M7/48
Foreign References:
| JP2018064313A | 2018-04-19 | |||
| JP2014002909A | 2014-01-09 | |||
| JP2021035152A | 2021-03-01 | |||
| JP2014147294A | 2014-08-14 | |||
| JP2020074670A | 2020-05-14 | |||
| JP2014176239A | 2014-09-22 | |||
| JP2001320884A | 2001-11-16 | |||
| JP2006230195A | 2006-08-31 |
Attorney, Agent or Firm:
AIWA INTERNATIONAL PATENT AGENCY (JP)
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