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COUPLING AS- 3236191 - Caterpillar



3236191 COUPLING AS- Caterpillar parts COUPLING
Rating:
16
Alternative (cross code) number:
CA3236191
323-6191
3236191
Caterpillar 3236191 COUPLING AS-
Weight: 0.32 pounds 0 kg.

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Illustration 1 g06057750
Machine General Information
The machine is equipped with a standard 70 kW generator. This generator produces 40kW @ 1300 rpm, and 70kW @ 2200 rpm. The generator provides 675VDC to power the electric screed heaters and an optional accessory power inverter. The generator is driven directly by the engine.Note: These machines are configured with one of two different engines. One engine meets US EPA Tier 4 Final and EU Stage IV emission standards. The second engine meets US EPA Tier 3, EU Stage IIIA, and China Stage II emissions standards. Illustrations throughout this section may show components unique to either configuration. Components relevant to this section are discussed as required.Electrical Power Generation
Illustration 2 g06058779
Generator Operation
(1) Stator
(2) Rotor
(3) Stator pole
(4) Stator winding
(5) Rotor pole
(6) Generator phase currentsRotor (2) of the switched reluctance generator is driven by the engine. Stator (1) is attached to the generator housing and remains stationary. The rotor and the stator are made of steel laminations with symmetrical and equally spaced salient poles. The salient poles on rotor (5) extend outward toward the stator. The salient poles on stator (3) extend inward toward the rotor. When the poles on the rotor and stator are aligned, a thin air gap separates the poles.Stator (1) includes copper coils (4) wound around each pole. The coils are electrically connected into three separate groups, each of which forms a phase.Rotor (2) has no magnets, windings, or brushes. Torque is transferred to (or from) the rotor through the principle of magnetic reluctance. In a magnetic field, magnetic flux will follow the path of least magnetic reluctance, analogous to electric current following the path of least resistance.In a switched reluctance motor, when a phase is energized, a magnetic field is created. Rotor poles (5) are pulled into alignment with this field to create the path of minimum reluctance. In the case of a generator, the torque from the engine pulls the rotor out of alignment with the energized phase. This movement increases the reluctance, causing more current to flow through the coils. The energy generated in the coils during this stage is greater than the energy put into the coils to create the initial magnetic field. The result is a net increase in electric energy.Each excitation cycle of a phase creates a single pulse of current on that phase. Combined generator phase currents (6) produce a continuous series of current pulses. The pulsed direct current (DC) is smoothed out by the capacitor contained within the inverter, resulting in a stable voltage output on the DC bus.


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