WE CLAIM:
1. An electric power steering device comprising:
a case;
a motor which is housed in the case!
a control unit which is housed in the case! and
a frame which compartmentalizes the motor and the control unit; wherein
a movement of the frame is restrained by using a step portion, which is provided at an inner wall surface of the case in a state where a corner portion of the frame is contacted to the step portion, and a connecting portion at which an outer circumference of the frame and an inner circumference of the case are fixed and bonded.
2. An electric power steering device as recited in claim 1, wherein an insertion force for the frame is low with respect to a pressure by which the motor is inserted to the case.
3. An electric power steering device as recited in claim 1, wherein a bearing, by which an output shaft of the motor is held, is included at a central position of the frame, and the connecting portion is provided at a surface near an outer circumference of the frame at an opposite side with respect to a hold side of the bearing.
4. An electric power steering device as recited in claim 1, wherein the frame is used as a heat sink by which heat, which is generated from the

control unit, is radiated.
5. An electric power steering device as recited in claim 1, wherein a groove is provided at an outer circumference surface, of the frame, which is contacted to an inner wall surface of the case.
6. An electric power steering device as recited in claim 1, wherein a hole, which penetrates in a state where an insulation distance is secured with respect to a conductor by which the control unit and the motor are connected, is included at the frame.
7. An electric power steering device as recited in claim 1, wherein a hole is provided at a central portion of the frame, and an output shaft of the motor penetrates the hole so as to be arranged, and a rotation sensor portion, by which a rotation is detected, is provided at a tip of the output shaft.
8. An electric power steering device as recited in claim 7, wherein the frame is formed as two layers configuration which is composed of a first frame, by which a bearing of the output shaft is held, and a second frame, by which a component, which is related to the rotation sensor portion, is held.
9. An electric power steering device as recited in claim 8, wherein a diameter of the second frame is nearly identical to a diameter of the first frame in the two layers configuration, and the connecting portion is provided at only the frame at a side which is faced to the control unit.