JPH0165000U

JPH0165000U -

Info

Publication number: JPH0165000U
Application number: JP1987157484U
Authority: JP
Priority date: 1987-10-16
Filing date: 1987-10-16
Publication date: 1989-04-26

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す配線図、第
２図は従来例を示す配線図である。１……３相交流発電機、１ａ……界磁巻線、２
……エンジン、３……整流器、４……平滑コンデ
ンサ、５……インバータ回路、６……フイルター
回路、７……トランス、８……整流・平滑回路、
９……偏差増幅器、１０……基準発信回路、１１
……比較器、１２……絶縁増幅回路、１５……電
源回路、１９……保護回路、２０……整流・平滑
回路、２１……励磁コイル、２１ａ……リレー、
２１ｂ……リレー、２２……トランジスタ、２３
……ＮＡＮＤ回路、２４……電源電圧検知回路、
２５……第１のインバータ、２６……第２のイン
バータ。 FIG. 1 is a wiring diagram showing an embodiment of this invention, and FIG. 2 is a wiring diagram showing a conventional example. 1... Three-phase alternating current generator, 1a... Field winding, 2
... Engine, 3 ... Rectifier, 4 ... Smoothing capacitor, 5 ... Inverter circuit, 6 ... Filter circuit, 7 ... Transformer, 8 ... Rectifier/smoothing circuit,
9... Deviation amplifier, 10... Reference oscillation circuit, 11
... Comparator, 12 ... Insulated amplifier circuit, 15 ... Power supply circuit, 19 ... Protection circuit, 20 ... Rectification/smoothing circuit, 21 ... Excitation coil, 21a ... Relay,
21b...Relay, 22...Transistor, 23
...NAND circuit, 24...Power supply voltage detection circuit,
25...first inverter, 26...second inverter.

Claims

[Scope of utility model registration request]

A three-phase alternator directly connected to the engine, a rectifier/smoothing circuit that converts the alternating current output voltage of this alternator into a direct current voltage, and then converts it into an alternating current output voltage of the desired commercial frequency. an inverter circuit that receives an output; a filter circuit that receives the output of the inverter circuit; a power supply circuit that supplies power to a field winding of the alternator; and a predetermined setting based on the output voltage of the alternator. a deviation amplifier that amplifies the difference between the voltage and the voltage; a comparator that receives the output of the deviation amplifier and compares it with the output of a reference oscillation circuit to generate a pulse-width-controlled voltage; A rectifying/smoothing circuit receives the DC output voltage from the rectifying/smoothing circuit as a power source, receives the output of the comparator, controls the field current of the field winding, and adjusts the AC output voltage of the alternator. A protection circuit that arbitrarily issues a signal to cut off the base signal of the transistor, and a power supply voltage detection circuit that detects that the voltage from the power supply circuit has reached an arbitrary value and issues a signal. A constant voltage control device for a three-phase alternating current generator, characterized in that the relay operates only when there is no signal from the protection circuit and there is a signal from the power supply voltage detection circuit.