Patent ID: 11932324
Assignee: HITACHI ASTEMO, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. An electric drive device of an electric power steering apparatus comprising:
an electric motor; and
an electronic control unit which is disposed on a side opposite to an output shaft of the electric motor with respect to the electric motor in an axial direction of the output shaft and controls the electric motor,
wherein
the electronic control unit includes a power supply circuit board which generates a power supply, a power conversion circuit board which has a power switching element which drives and controls the electric motor, a control circuit board which controls the power switching element, and a connector terminal assembly which constitutes a connector terminal with a power supply wiring member and a signal wiring member,
the power supply circuit board, the power conversion circuit board, and the control circuit board have a first flexible portion and a second flexible portion between two adjacent boards, and are stacked and disposed in three stages in which the power supply circuit board is disposed between the power conversion circuit board and the control circuit board with the first flexible portion and the second flexible portion as a bend portion,
the connector terminal assembly has a power supply circuit board connection terminal which is provided at an end portion of the power supply wiring member and a control circuit board connection terminal which is provided at an end portion of the signal wiring member, and is disposed on a side away from the electric motor with respect to the power supply circuit board, the power conversion circuit board, and the control circuit board, and
the power supply circuit board connection terminal and the control circuit board connection terminal are electrically connected to a receiving terminal of the power supply circuit board and a receiving terminal of the control circuit board, respectively, by being inserted and press-fitted thereinto.