GENERATOR CONSTRUCTION [AJ (3.0L Duratec)]
BUE011718300N02
Generator
• When the ignition switch is turned to the ON position, voltage is supplied to the regulator from the terminal L circuit through the generator warning light in the instrument cluster. The regulator then operates and current flows to the generator field coil from the terminal S circuit. When the engine is started, the generator generates AC which is converted to DC internally. The current is then supplied to electronic devices through generator terminal B.
• When the generator begins generating electricity, voltage from the generator stator is fed back to the regulator. This feedback voltage (generally half the battery voltage) is used for illumination on/off of the warning lights.
• When the system is functioning normally, the generator output current is determined according to the voltage from the terminal S circuit. The regulator compares the voltage from the terminal S circuit and the set internal voltage, and adjusts the field current to control output correctly. The set voltage fluctuates according to temperature whereby, generally, the voltage is higher when the temperature is low and lower when the temperature is high. This keeps the battery charged in the winter and prevents overcharging in the summer.
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1
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Stator coil
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2
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Generator
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3
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Regulator
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4
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Power transistor
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5
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Ignition switch
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6
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Battery
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Terminal B circuit
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• Generator output is supplied to the battery from terminal B, and to each electronic device.
Terminal L circuit
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• Terminal L circuit is for supplying power to the regulator. When the ignition switch is turned to the ON position, this circuit supplies power. If there is a malfunction in the charging system, terminal L circuit is also used to illuminate the generator warning light.
Circuit terminal S
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• Terminal S circuit is used to detect battery voltage. This voltage is used to determine generator output. This circuit is used to supply current to the rotor. The amount of current supplied to the rotor is determined by the generator output.