DC POWER SUPPLY DEVICE

• Main Authors: FUKUMOTO YOSHIKI, OGAMI YASUYUKI
• Format: Patent
• Language: English; Japanese
• Published: 28.09.2017
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a DC power supply device capable of parallel operation of a plurality of DC-DC converters which prevents occurrence of difference in output between the plurality of DC-DC converters due to variations of characteristics of circuit elements and sudden change in a load.SOLUTION: PWM pulse generators 6A and 6B for feeding PWM pulses to switching elements of DC-DC converters 1 and 2 are provided in each DC-DC converter, respectively, and a feedback control section 7 is provided commonly to all DC-DC converters 1 and 2. The common feedback control section controls PWM pulse generators disposed for each DC-DC converter to provide control of keeping output voltage at a target value. Output correction sections 12A and 12B for correcting duty ratio of a PWM pulse set by the feedback control section are disposed for the DC-DC converters 1 and 2, respectively, to eliminate difference in output between the two DC-DC converters.SELECTED DRAWING: Figure 1 【課題】複数のＤＣ−ＤＣコンバータを並列運転する直流電源装置において、回路素子の特性のばらつきや負荷の急変により、複数のＤＣ−ＤＣコンバータの出力に差が生じるのを防ぐこと。【解決手段】ＤＣ−ＤＣコンバータ１，２のスイッチング素子にＰＷＭパルスを与えるＰＷＭパルス発生器６Ａ，６Ｂを各ＤＣ−ＤＣコンバータ毎に設け、フィードバック制御部７をすべてのＤＣ−ＤＣコンバータ１，２に対して共通に設ける。共通のフィードバック制御部により、各ＤＣ−ＤＣコンバータ毎に設けたＰＷＭパルス発生器を制御して出力電圧を目標値に保つ制御を行わせる。２台のＤＣ−ＤＣコンバータの出力の差を無くすように、フィードバック制御部により設定されたＰＷＭパルスのデューティ比を補正する出力補正部１２Ａ，１２Ｂを、ＤＣ−ＤＣコンバータ１，２のそれぞれに対して設ける。【選択図】 図１