Subaru Robin Power Products R600 manual 2GENERATOR Operation, Voltage Fluctuations Under Load

8-2GENERATOR OPERATION

INITIAL	EXCITATION		STATOR
PERMANENT		MAGNETO
	FIELD	COIL	i
ROTOR		:	I

RECEPTACLE

RESIS	-----
DIODE	MAIN COIL

CONDENSER COIL

CONDENSER

L ------A

Fig. 8-2

8-2-l GENERATION of NO-LOAD VOLTAGE

1)When the generator starts turning the permanent magneto built-in to the flywheel generates@ 1 to 2\’ of AC voltage in the main coil and also generates 1 to 4 of AC voltage in the condenser coil.

2)The capacitor coil is connected to a capacitor so when a voltage is applied to the condenser coil. minimun current

@flows in the condenser coil. At this time, minimum flus is produced. vvith which the magnetic force of the rotor’s magnetic pole is intensified. When this magnetic force is intensified. the respective voltages in the main coil and condenser coil rise. Current 1s flowing in the condenser coil increases.with the magnetic tlux densit)- of the rotor’s magnetic pole increasing further. Also. the main coil voltage and condenser coil voltage increases. These voltages continue rising as this process is repeated.

3)As current flows in the condenser coil. the magnetic flux density changes. DC voltage is induced in the field coil when the magnetic flus density varies. Successively. DC current is rectified bl the rectifiers connected to both ends of the field coil. and DC current @ flows in the field circuit. With this current. the rotor core is magnetized. allowing the generator to output steady voltage.

41When generator speed reaches 2000 to 2300 rpm (50 Hz specification) or 3000 to 3300 rpm (60 Hz specification). the current in the condenser coil and field coil increasessudden&. This acts to stabilize the respective coil output voltages. If generator speed further rises to the rated v-alue.the generator output voltage will reach the rated value.

8-2-2 VOLTAGE FLUCTUATIONS UNDER LOAD

When load current -s flows from the electric equipment to the generator. the magnetic flux which is produced as current

.s flows in the main coil. this serves to increase current ‘$ flowing in the capacitor coil. With current @increased. the magnetic flux density across the rotor core rises. As a result. the current flowing in the field coil increases,and the genera- tor output voltage is prevented from decreasing.

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