List of Symbols
 | Electrical quantities referred to the stator |
| º | Degree |
| Ar | Reference signal amplitude |
| Ac | Carrier signal amplitude |
| B | Rotor and load damping factor, N-m-s |
| C | Capacitance, F |
| Ci | Input filter capacitance, F |
| Co | Output filter capacitance, F |
| CC | Commutation circuit capacitance, F |
| CR | Resonant capacitor |
| CS | Snubber circuit capacitance, F |
| D | Duty cycle |
| d | Direct axis |
| de−qe | d–q axes of the synchronous rotated reference frame |
| ds−qs or dα−qβ | d–q axes of the stator reference frame |
| dx−qx | d–q axes of the arbitrary reference frame |
| E | DC load voltage source or electromotive force |
| Εg | Electromotive force or speed voltage of a dc motor, V |
| fa, fb, fc | Variables of a symmetrical three-phase abc system, ... |
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