| 摘要 |
Stationary rotor position identification method in a drive circuit for a brushless three-phase electric motor having three motor connections (TA, TB, TC) having the following steps: - application of a measurement signal to two of the three motor connections, in which DC voltages are applied to two of the motor connections successively and alternating between the motor connections, to each motor connection and with a different mathematical sign, with the DC voltage remaining essentially the same in a limited time period, - measurement of the induced voltage at the respective third motor connection, through which no current flows, within the time period and once or more during one measurement sequence, - assessment of the voltages measured during the measurement sequence, in particular of their mathematical signs, with respect to the rotor position. A motor drive circuit for carrying out the above method, and its use, are also described. |
