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Power Angle da Load a Maimaitar Synchronous

Power angle (Power Angle) da load a maimaitar synchronous suna da wani alaka mai yawa. Fahimtar wannan abubuwa take taimaka waɗanda suka yi fahimta hanyar da kuma na'ura cikin maimaitar synchronous. Haka shi ne bayani mai zurfi:

1. Power Angle (Power Angle)

Takardun

Power Angle (ko Torque Angle ko Electric Angle, wadanda aka sanya da δ) shine farkon tsari bayan axis magnetic field ta rotor da axis magnetic field ta stator. Wannan na nuna matsayinta axis magnetic field ta rotor zuwa axis magnetic field ta stator.

Dagam

• Transfer of Power: Power angle ya haɓaka da active power da maimaitar synchronous ya samu daga grid. Idan power angle yake zama mafi, maimaitar ya samu active power mafi.

• Stability: Idan power angle yake zama mafi sosai, za iya haɗaƙa maimaitar daɗe synchronization, kuma za iya ƙoƙarin "slip" phenomenon.

2. Load

Takardun

Load shine mechanical load da maimaitar synchronous ya ƙare, aiki a cikin watts ko kilowatts.

Alaka

Alaka Power Angle da Load: Power angle δ da load P a maimaitar synchronous suna da alaka mai lafiya, wanda ake bayyana da wannan formula:

Amsa:

• P shine active power da maimaitar ya samu (watts ko kilowatts).

• E shine no-load EMF (electromotive force) na maimaitar (volts).

• V shine grid voltage (volts).

• Xs shine synchronous reactance na maimaitar (ohms).

• δ shine power angle (radians).

3. Graphical Representation of Power Angle Characteristics

Characteristics Curve

• Characteristics Curve: Alakan bayan power angle da load zai iya bayyana da characteristics curve. Wannan curve yana da lafiya mai lafiya kuma ana gudanar da sine function.

• Maximum Power Point: Idan power angle δ ya ci 90 degrees (π/2 radians), maimaitar ya samu maximum active power Pmax:

Slip Point: Idan power angle yake bi 90 degrees, maimaitar zai iya haɗaƙa da synchronization, kuma za iya ƙoƙarin "slip" condition.

4. Influencing Factors

Grid Voltage

Voltage Variation: Changes in grid voltage V affect the relationship between the power angle and load. An increase in voltage allows the motor to absorb more active power.

Motor Parameters

Synchronous Reactance: Synchronous reactance Xs is an important internal parameter of the motor, affecting the relationship between power angle and load. A higher synchronous reactance results in less active power absorption by the motor.

Load Variation

Increase in Load: When the load increases, the motor automatically adjusts the power angle to absorb more active power until a new equilibrium point is reached.

5. Summary

• Power Angle δ: Represents the phase difference between the rotor magnetic field and the stator magnetic field, directly influencing the active power absorbed by the motor.

• Load P: The mechanical load driven by the motor, having a nonlinear relationship with the power angle.

• Relationship Formula: P=（EV/Xs） sin(δ) describes the relationship between power angle and load.

• Maximum Power Point: When the power angle δ reaches 90 degrees, the motor absorbs the maximum active power Pmax=EV/ Xs.

• Slip Point: When the power angle exceeds 90 degrees, the motor may lose synchronization.

Understanding these concepts helps to better design and operate synchronous motors, ensuring their stable operation under various conditions.