| 摘要 |
<p>An arrangement for the suppression of radio interference in an electric motor (10) having at least two brushes (11,13,15), the arrangement comprising a high frequency interference suppression circuit and a low frequency interference suppression circuit, the high frequency interference suppression circuit comprising a ferrite bead (24,26) which surrounds a portion of a lead (36,38) connectable to one (11,13) of the brushes, and a capacitor (28,30) which is capable of self resonance in the high frequency band, and the low frequency interference suppression circuit comprising a capacitor (32,34). Also disclosed are an isolating element between the low frequency and high frequency suppression circuits and a separate grounding method for each circuit for reducing the interaction between the high frequency and the low frequency suppression circuits.</p> |
