PURPOSE: To deal with various specifications for fixing by splitting a fixing bracket into a supporting/fixing part and a rotor bearing supporting part so that the fixing position of bracket can be set differently thereby increasing the degree of freedom in the fixing angle and direction.

CONSTITUTION: A fixing bracket is split into a rotor bearing supporting part 1 being assembled with the bearing of the rotor 5 and a stator 4, and a part 2 being secured to a machine and supported thereby. The rotor bearing supporting part 1 is provided with a positioning hole for securing the part 2. This structure increases the degree of freedom in the fixing angle and direction of the bracket to a vehicle or a machine and various specification for fixing can be dealt with.