Electric power steering device
In an electric power steering device, a control unit includes: a power module including a plurality of switching elements configured to supply current to motor windings of a motor; a control board configured to output a control signal to each of the plurality of switching elements; a housing forming an outer case of the control unit; a power supply connector; and a signal connector. The control board is provided in parallel to the axial direction of the output shaft of the motor, and a projection is formed at a bottom portion on the non-output side of the housing so as to protrude to the non-output side. A non-output side end portion of the control board is inserted into the projection, and the power supply connector and the signal connector are provided in a region other than the projection of an outer wall surface of the bottom portion.
1. An electric power steering device, comprising:
a motor; and
a control unit provided on a non-output side in an axial direction of an output shaft of the motor to be integrated with the motor,
the control unit including:
a power module including a plurality of switching elements configured to supply current to motor windings of the motor;
a control board configured to output a control signal to each of the plurality of switching elements;
a heat sink, to which the power module is mounted, and is configured to release heat generated in the plurality of switching elements;
a housing forming an outer case of the control unit;
a power supply connector; and
a signal connector,
wherein the control board is provided in parallel to the axial direction of the output shaft,
wherein a projection is formed at a bottom portion on the non-output side of the housing so as to protrude to the non-output side,
wherein a non-output side end portion of the control board is inserted into the projection,
wherein the power supply connector and the signal connector are provided in a region of an outer wall surface of the bottom portion spaced from the projection,
wherein a hole is formed to pass through the bottom portion, and
wherein an extension terminal extending from a contact pin of at least one connector out of the power supply connector and the signal connector, and each of a plurality of relay terminals to be connected to the extension terminal, which extend from the control board and the power module, are led out to the non-output side through the hole and connected to each other.
2. The electric power steering device according to claim 1 , wherein the projection, the hole, and the at least one connector are each formed linearly, and arranged in this order in parallel to one another in a direction orthogonal to a length direction of the projection.
3. The electric power steering device according to claim 2 , wherein the hole is formed linearly, and connection portions between the extension terminals and the relay terminals are arranged in a row in the hole.
4. The electric power steering device according to claim 3 , further comprising a cover configured to close the hole.
5. The electric power steering device according to claim 2 , further comprising a cover configured to close the hole.
6. The electric power steering device according to claim 1 , wherein the hole is formed linearly, and connection portions between the extension terminals and the relay terminals are arranged in a row in the hole.
7. The electric power steering device according to claim 6 , further comprising a cover configured to close the hole.
8. The electric power steering device according to claim 1 , further comprising a cover configured to close the hole.
9. The electric power steering device according to claim 1 ,
wherein at least one connector out of the power supply connector and the signal connector is provided on a radially outer side of the projection at the outer wall surface of the bottom portion, and
wherein an extension terminal extending from a contact pin of the at least one connector is directly connected to the control board.