This calculator estimates the time required for a motor to accelerate from standstill to rated speed under different starting conditions (Direct Online, Star-Delta, or Soft Starter). The calculation considers motor power, speed, inertia, and load characteristics.
The formulas used are: ω = (2π × RPM)/60 (angular velocity), T_rated = P/ω (rated torque), and t = (J_total × ω)/(T_avg - T_load) (starting time), where J_total is the combined motor and load inertia, T_avg is the average starting torque (varies by starter type), and T_load is the load torque.
Use this tool to evaluate different starting methods and their impact on motor acceleration time, helping with proper motor and starter selection for your application.