JPS61189782U

JPS61189782U -

Info

Publication number: JPS61189782U
Application number: JP7205685U
Authority: JP
Priority date: 1985-05-15
Filing date: 1985-05-15
Publication date: 1986-11-26

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に使用される導通時
間決定回路の具体例回路図、第２図は一般の電力
変換装置を示す図、第３図は第１図の外部の波形
を示す図、第４図は本考案の他の一実施例に使用
される導通時間決定回路の具体例回路図である。１……直流電源、２……変圧器、３……スイツ
チングトランジスタ、４……整流平滑回路、５…
…負荷、６……偏差増幅器、７……導通時間決定
回路、８……駆動パルストランス、９……整流回
路、１０……ダイオード、１１……コンデンサ、
１２，１３，１４……端子、１５……選択回路、
１６，１７，１７′，２２，２３，３４……トラ
ンジスタ、１８，１８′，１９，１９′，２０，
２０′，２８，２８′，２９，３０，３１……抵
抗器、２１……電圧パルス幅変換回路、２４，２
５，２６……コンパレータ、２７……コンデンサ
、３２……基準電圧源、３３……基準発振回路。 Fig. 1 is a specific example circuit diagram of a conduction time determining circuit used in an embodiment of the present invention, Fig. 2 is a diagram showing a general power conversion device, and Fig. 3 shows external waveforms of Fig. 1. 4 are specific example circuit diagrams of a conduction time determining circuit used in another embodiment of the present invention. 1... DC power supply, 2... Transformer, 3... Switching transistor, 4... Rectifier smoothing circuit, 5...
... Load, 6 ... Deviation amplifier, 7 ... Conduction time determining circuit, 8 ... Drive pulse transformer, 9 ... Rectifier circuit, 10 ... Diode, 11 ... Capacitor,
12, 13, 14... terminal, 15... selection circuit,
16, 17, 17', 22, 23, 34...transistor, 18, 18', 19, 19', 20,
20', 28, 28', 29, 30, 31...Resistor, 21...Voltage pulse width conversion circuit, 24, 2
5, 26... Comparator, 27... Capacitor, 32... Reference voltage source, 33... Reference oscillation circuit.

Claims

[Scope of utility model registration request]

It has a series circuit of a DC power supply, a transformer or reactor, and a switching element, and a conduction time determining circuit that controls the conduction time of the switching element with negative feedback according to the deviation of the output voltage from the reference voltage, ensuring stable output. In a power conversion device configured to obtain a voltage, the conduction time determining circuit includes a selection circuit that selects either a voltage based on the DC power supply voltage or a voltage based on the deviation voltage, and a voltage selected by the selection circuit. A power conversion device comprising a voltage-pulse width conversion circuit that converts a pulse width according to the voltage, and limiting a voltage based on the deviation voltage to a voltage based on the DC power supply voltage.