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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/208474
Kind Code:
The present invention adjusts the output of a plurality of solar cell strings in accordance with the power consumption of a load device or similar and the intensity of sunlight. The voltage of a low potential line LL is a reference potential. The voltage of a high potential line LH is a DC voltage of a high potential compared to the reference potential. Solar cell strings 11-14 output voltages to the high potential line LH. When the voltage of the high potential line LH is, for example, 410V or less, a control unit 100 outputs a PWM signal VP1. The PWM signal VP1 is a pulse wave having a duty ratio that increases in accordance with a decrease in the voltage of the high potential line LH and decreases in accordance with an increase in said voltage. PWM signals VP2-VP4 are each the same type of pulse wave as the PWM signal VP1. Following the PWM signal VP1, the control unit 100 outputs each of the PWM signals VP2-VP4 when the sequentially preceding PWM signal is at or above a prescribed duty ratio. The opening and closing of switches SW1-SW4 are individually controlled by each PWM signal VP1-VP4.

HANEDA Masaji (975 Jorakuji, Azuchicho Omihachiman-sh, Shiga 51, 〒5211351, JP)
Application Number:
Publication Date:
October 31, 2019
Filing Date:
April 22, 2019
Export Citation:
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NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
International Classes:
H02J1/00; H02J1/12; H02J3/38; H02S10/00
Foreign References:
Attorney, Agent or Firm:
KOJIMA Takiro (KOJIMA & ASSOCIATES, Tokyo Kotsu Kaikan 9F 2-10-1, Yurakuch, Chiyoda-ku Tokyo 06, 〒1000006, JP)
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