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Rotor acceleration refers to the rate at which the rotational speed of a synchronous machine's rotor changes. It is determined by the difference between the input power supplied to the machine and the electromagnetic power developed during operation.
The calculator uses the formula:
Where:
Explanation: The accelerating power represents the net power available to change the rotational speed of the rotor. A positive value indicates acceleration, while a negative value indicates deceleration.
Details: Calculating accelerating power is crucial for analyzing the dynamic behavior of synchronous machines, determining stability margins, and designing appropriate control systems for power system operation.
Tips: Enter both input power and electromagnetic power in watts. Ensure values are non-negative and valid for accurate calculation results.
Q1: What is the physical significance of accelerating power?
A: Accelerating power determines how quickly a synchronous machine's rotor will speed up or slow down in response to changes in mechanical input or electrical load.
Q2: When is accelerating power zero?
A: Accelerating power becomes zero when input power equals electromagnetic power, indicating steady-state operation with constant rotor speed.
Q3: How does accelerating power relate to rotor angle stability?
A: The integral of accelerating power over time determines the change in rotor angle, which is critical for maintaining synchronism in power systems.
Q4: Can accelerating power be negative?
A: Yes, when electromagnetic power exceeds input power, the accelerating power becomes negative, indicating that the rotor is decelerating.
Q5: What units are used for these power measurements?
A: All power values are typically measured in watts (W) or per-unit values based on the machine's rating.