Self-Excited Series DC Motor Calculator

Self-Excited Series DC Motor Calculator

Calculate key parameters for a self-excited series DC motor.

Using the formulas:
Field Current: \( I_f = \frac{V}{R_f} \) (since in series, \( I_f = I \))
Effective Flux: \( \phi = k_f \, I \)
Back EMF: \( E_b = V – I (R_a + R_f) \)
Motor Speed: \( \omega = \frac{E_b}{k\,\phi} \)
Developed Torque: \( T = k_t \, \phi \, I \)

* Enter values in SI units.

Step 1: Enter Motor Parameters

Example: 220 V

Example: 100 Ω

Example: 0.5 Ω

Example: 10 A

Example: 0.05 V/(rad/s·Wb)

Example: 0.0005 Wb/A

Example: 1 Nm/(Wb·A)

Key Formulas:
Field Current: \( I_f = \frac{V}{R_f} \) (In series, \( I_f = I \))
Effective Flux: \( \phi = k_f \, I \)
Back EMF: \( E_b = V – I (R_a + R_f) \)
Motor Speed: \( \omega = \frac{E_b}{k\,\phi} \)
Developed Torque: \( T = k_t \, \phi \, I \)