| 摘要 |
An electronically commutated motor comprises a rotor ( 208 ); a stator ( 201 ) electromagnetically interacting with the rotor ( 208 ), which stator is formed with a stator winding ( 202, 204, 206 ); a power stage ( 122 ) controlling the currents flowing in the stator winding ( 202, 204, 206 ) during operation; at least one current measuring element ( 242, 244 ) for sensing a measured value for the currents (I_UPPER, I_LOWER) flowing in the power stage, and an overcurrent measuring element ( 152, 162 ) for evaluating an associated measured value and for sensing a current whose absolute value exceeds a predetermined limit value (I_MAX_UPPER, I_MAX_LOWER); a holding element ( 154, 164 ) associated with the overcurrent measuring element ( 152, 162 ), configured, when an overcurrent occurs in the associated current measuring element ( 242, 244 ), to generate an overcurrent signal (OC_UPPER, OC_LOWER), to store the signal, and to deliver a signal to the power stage ( 122 ).
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