Subaru Robin Power Products RGV12100, 13100T Description of Generator Operation, － 17－

Page 20

4-3 DESCRIPTION of GENERATOR OPERATION

4-3-1 PRIMARY EXCITING ACTION (RGV12100)

When the generator is started, the perma-

FC

nent magnet on the engine rotates to genera- tor a voltage in the exciting coil.

This voltage is regulated by a diode in the AVR to feed a current to the generator field coil. (FC). (See Fig. 4-1)

The rotor is turned an electromagnet by that current and rotates so that voltage are gener- ated in the stator coils (main coil and sub coil). The voltage generated in the sub coils is operated by the AVR to feed a current to increase the field coil current. (See Fig. 4-2) As a result, the rotor magnetism increases. This operation is repeated to generate the rated voltage at 50 Hz or 60 Hz in the main coil and DC coil.

MC

4-3-2 VOLTAGE REGULATING MECHANISM (RGV12100)

SC

AVR

aEC

ENGINE MAGNETO

Fig. 4-1

FC b AVR

Connect a load to the AC output terminal and increase current. Output voltage varies as shown in Fig. 4-3 depending on whether an automatic voltage regulator is used or not. The operation of the AVR is explained below. When an AC output is taken, the engine is loaded and its rpm falls, Also the AC voltage fails due to the voltage drop caused by the internal resistance of the coils. The AVR detects this voltage drop and its built-in SCR automatically increase the current flows to the field coil. As a result, the rotor magnetism increase, the voltage fallen by the load cur- rent is raised, and the output voltage is kept constant. If the AC output is reduced, the SCR operates in the opposite way to similarly keep the output voltage constant.

Fig. 4-2

WITHOUT AVR

RATED VOLTAGE

V

WITH AVR

A

Fig. 4-3

－ 17－

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Contents Generators Contents － 04－ Specifications － 1－Performance Curves － 2－General Description of Generator － 3－Control Panel － 4－Serial Number － 5－－ 6－ Construction and FunctionStator Rotor Brush / Brush HolderCurrent Transformer Diode Unit RGV13100T only－ 8－ 5 A.V.R Automatic Voltage Regulator RGV12100 onlyECU Electronic Control Unit Idle Control Unit RGV12100 only － 9－OIL Pressure Switch AC Switch NO-FUSE BreakerRelief Valve － 10－－ 11－ AC ReceptacleRGV13100T － 12－ AC plug Description－ 13－ Connecting to Domestic Circuit House WiringGfci Receptacle － 14－－ 15－ AC Three Phase Receptacle RGV13100T only － 16－Description of Generator Operation Primary Exciting Action RGV12100Voltage Regulating Mechanism RGV12100 － 17－－ 18－ Current Transformer Control RGV13100TAdvantages of Current Transformer Control RGV13100T Safety Precautions Do not place inflammable materials near the generatorOperate the generator on a level surface Do not operate with wet hands or in the rainIncandescent lamp, heater, etc. with a power factor Range of ApplicationsMotor driven tools and light electrical appliances － 20－Appliances without any indication as to power consumption － 21－－ 22－－ 23－ Measuring ProceduresMeasuring Instruments AC Output Measuring － 24－－ 25－ Measuring Insulation ResistanceStator Rotor Control PanelCurrent Transformer RGV13100T － 26－Checking Functional Members Pilot Lamp and VoltmeterAC Receptacles － 27－RGV12100 － 28－－ 29－ Rotor AssemblyExciting Coil RGV12100 only Brush A.V.RAutomatic Voltage Regulator － 30－Current Transformer RGV13100T only － 31－－ 32－ Idle Control UnitRGV12100 only － 33－ Disassembly and Assembly Preparation and PrecautionsDisassembly Procedures Control Panel AlternatorComponent Parts － 35－Generator assembly Control Box RGV12100 Control Box RGV13100T Fuel Tank Generator Assembling Procedures Front Cover － 40－－ 41－ Rear Cover － 42－－ 43－ Troubleshooting No AC outputAC Voltage is too high or too low Check engine speed Check if engine is overheatedEngine dose not run － 45－Wiring Diagram － 46－－ 47－ Lively Blvd. Wood Dale, IL 60191 Phone 630-350-8200 Fax