Drive unit

Abstract

To provide a drive unit which can reduce an influence of a current magnetic field to a magnetic sensor.SOLUTION: A drive unit 1 comprises a motor 10 and a circuit part 20. The circuit part 20 comprises: switching elements 31 to 36; a rotation angle sensor 51 concerning rotation detection of the motor 10; and a circuit board 21 and is provided on one side in an axial direction of the motor 10. The switching elements 31 to 36 constitute an inverter 30 which switches energization of a winding 11. The switching elements 31 to 36 and the rotation angle sensor 51 are mounted on the circuit board 21. A power region Rp in which wiring patterns P1 to P5 to be connected with the switching elements 31 to 36 are formed and relatively large current flows and a control region Rc in which the rotation angle sensor 51 is provided and relatively small current flows are separated from each other on the same circuit board 21.SELECTED DRAWING: Figure 5

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