Zexel Gmbh

Mitsuji Sekiya

Shinichi Ohi

Kazuyoshi Horiuchi

Kanta Arai

Koji Ando

A brushless motor which includes an arrangement to prevent dielectric breakdown of electronic parts mounted on a control board. The breakdown is caused by a heat sink which becomes electrostatically charged. The potential at the heat sink, which contacts switching devices (for instance, FETS) of the brushless motor, is equalized with the potential at one side of a source line for a drive circuit formed on the control board that includes the switching device. As a result, when the heat sink becomes electrostatically charged, the charge at the heat sink can be discharged to the source line, thereby eliminating the above problem.

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Konan, Japan

Mitsuji Sekiya