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1. (WO2018220777) POWER SUPPLY DEVICE AND POWER SUPPLY SYSTEM WHICH USES SAME

Pub. No.:    WO/2018/220777    International Application No.:    PCT/JP2017/020386
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Fri Jun 02 01:59:59 CEST 2017
IPC: H02M 7/12
H02J 9/00
H02M 5/42
Applicants: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
東芝三菱電機産業システム株式会社
Inventors: TOYODA, Masaru
豊田 勝
Title: POWER SUPPLY DEVICE AND POWER SUPPLY SYSTEM WHICH USES SAME
Abstract:
A control device (14) of a stabilized power supply device (1) is equipped with: a comparator (35) for comparing the highs and lows of a voltage command value (Vir) and a triangle wave signal (Cu), and on the basis of the comparison results, generating gate signals (Au, Bu) in order to control IGBTs (Q1-Q6) of a converter (6); and a frequency adjustment unit (32) for adjusting the frequency of the triangle wave signal (Cu) to a lower-limit value (fL) within a range in which setting the DC voltage (Vdc) to a reference DC voltage (Vr) is possible. Consequently, it is possible to reduce the switching loss which occurs in the IGBTs (Q1-Q6) of the converter (6).