JARANG YANG TAHU!!! Ternyata inilah Prinsip Kerja Generator Brushless PMG Excitation

Summary

In this video, the Training Center Souqy explores the structure, function, and working principles of a brushless BMJ excitation alternator. The components covered include the exciter stator and rotor, the main rotor and stator, rectifiers, bearings, cooling fans, and the permanent magnet generator (PMJ). Key functions such as power regulation by the automatic voltage regulator (AVR), and the role of the PMJ in supplying power to the alternator system are also explained. The video outlines the flow of electricity from the exciter rotor through to the main alternator system, emphasizing how the system maintains stable voltage under varying loads.

Takeaways

• 😀 The video introduces the structure and function of a brushless BMJ excitation alternator, focusing on key components and their roles in the system.
• 😀 The coupling connects directly to the flywheel, receiving rotational energy from the engine to make the rotor spin.
• 😀 The cooling fan directs airflow to cool the windings inside the alternator, preventing overheating and ensuring efficient operation.
• 😀 The main stator generates electricity as it interacts with the rotating main rotor's magnetic field, with common configurations involving three-phase windings.
• 😀 The main rotor is an electromagnet that receives DC voltage, generating a magnetic field that induces electricity in the stator.
• 😀 Rectifiers (or diodes) are used to convert the AC output from the exciter rotor into DC voltage, which is necessary for energizing the main rotor's magnetic field.
• 😀 A varistor is included to protect the diodes from voltage surges, which may be caused by lightning or synchronization failures.
• 😀 The exciter rotor and stator work together to generate a DC output, which is essential for controlling the alternator's voltage.
• 😀 The automatic voltage regulator (AVR) maintains stable voltage by adjusting the output from the exciter stator based on changes in the main stator's voltage.
• 😀 A permanent magnet generator (PMJ) supplies power to the AVR, ensuring proper regulation and monitoring of the system's voltage levels.
• 😀 The video concludes by explaining the dynamic process of electrical generation, where the movement of magnets and windings induces electrical output, and the AVR adjusts to maintain optimal voltage levels.

Q & A

What is the main function of the coupling in the brushless BMJ excitation alternator?

The coupling is responsible for connecting directly to the flywheel, receiving the rotation from the engine or prime mover, allowing the rotor to rotate.

How does the cooling fan work in the alternator system?

The cooling fan directs airflow from the rear bottom of the alternator to the side and front vents, primarily to cool the windings inside the alternator.

What is the role of the exciter stator in a brushless BMJ excitation alternator?

The exciter stator functions as a permanent magnetic source and receives DC voltage to generate a magnetic field necessary for the alternator's operation.

How does the exciter rotor contribute to the alternator's power generation process?

The exciter rotor is an armature winding that generates three-phase AC voltage, which is then rectified into DC to supply the main rotor with the necessary current for magnetic excitation.

What is the purpose of the diodes or rectifiers in the alternator system?

The diodes or rectifiers are used to convert the AC voltage from the exciter rotor into DC voltage, which is then directed to the main rotor to generate a magnetic field.

What is the function of the automatic voltage regulator (AVR) in the alternator?

The AVR regulates the output voltage by adjusting the excitation of the exciter stator. It increases or decreases the voltage to ensure the output voltage remains stable.

How does the alternator's main rotor work to generate a magnetic field?

The main rotor, which is an electromagnet, receives DC voltage. The current flowing through it creates a magnetic field that interacts with the armature windings in the stator to produce electricity.

What is the role of the permanent magnet generator (PMJ) in the excitation system?

The PMJ provides a power supply to the AVR and exciter stator by using permanent magnets to generate electricity, serving as a backup and stable power source for the excitation system.

How do the bearings function in the alternator system?

Bearings in the alternator support the rotating components such as the rotor and exciter, ensuring smooth rotation and minimizing friction and wear during operation.

What is the principle of operation when the alternator begins generating power?

When the prime mover or engine rotates, the rotor spins, which causes the exciter stator and PMJ to generate a magnetic field. This induces voltage in the exciter rotor and main stator, resulting in the generation of electrical power.