Title:
POWER CONVERTER CONTROL SYSTEM USING FIXED PULSE PATTERN, AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2021/014690
Kind Code:
A1
Abstract:
The present invention makes it possible to perform fixed pulse pattern control with the optimum number of switching times depending on a modulation rate. A minimum necessary number of levels L_duty for outputting a target modulation rate d_ref is set (S2). The total number N_volt of voltage orders to be controlled from among the voltage fundamental wave and harmonic waves of a power converter is set (S3). The set minimum necessary levels L_duty and the total number N_volt of voltage orders to be controlled are compared with each other, and whichever is greater is determined to be the number of switching times N in a quarter cycle at the target modulation rate (S4 - S6). When N_volt is determined to be the number of switching times N, the form of an output voltage is set (S7). On the basis of the determined target modulation rate d_ref and the number of switching times N in the quarter cycle, the phases of N switching times are obtained and a pulse pattern of one cycle is derived in which an output voltage level according to those target modulation rate, form of the output voltage, and phases is set (S8, S9).
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Inventors:
OGAWA RYUICHI (JP)
TAKIGUCHI MASASHI (JP)
TAKIGUCHI MASASHI (JP)
Application Number:
PCT/JP2020/014459
Publication Date:
January 28, 2021
Filing Date:
March 30, 2020
Export Citation:
Assignee:
MEIDENSHA ELECTRIC MFG CO LTD (JP)
International Classes:
H02M7/48
Domestic Patent References:
| WO2016104370A1 | 2016-06-30 |
Foreign References:
| JP2013215041A | 2013-10-17 | |||
| JP2014143831A | 2014-08-07 | |||
| JP6270696B2 | 2018-01-31 |
Other References:
MASAHIKO TSUKAKOSHIKOUKI MATSUSE: "The transactions of the Institute of Electrical Engineers of Japan", vol. 131, 2011, D, A PUBLICATION OF INDUSTRY APPLICATIONS SOCIETY, article "Method for Obtaining Fixed Pulse Pattern Suitable for Harmonic Regulation in Large-Capacity PWM Rectifier Systems"
See also references of EP 3993252A4
See also references of EP 3993252A4
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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