Motor
A motor includes: a motor main body; a power board including a switching element and electrically connected to the motor main body; a control board electrically connected to the power board and disposed on an axial counter output side of the motor main body; a control board holder attached to the motor main body to hold the control board; a sensor magnet located on a counter output side of a stator and fixed to a shaft; a rotation sensor attached to the control board to face the sensor magnet; and a power board case directly or indirectly attached to the motor main body to hold the power board. The power board is positioned radially outward of the motor main body. Board surfaces of the power board are inclined with respect to board surfaces of the control board.
1. A motor, comprising:
a motor main body including a rotor including a shaft centered on a center axis extending in an axial direction, and a stator surrounding the rotor;
a power board including a switching element and electrically connected to the motor main body;
a control board electrically connected to the power board and disposed on an axial counter output side of the motor main body;
a control board holder attached to the motor main body to hold the control board;
a sensor magnet positioned on a counter output side of the stator and fixed to the shaft;
a rotation sensor attached to the control board to face the sensor magnet; and
a power board case directly or indirectly attached to the motor main body to hold the power board, wherein
the power board is positioned radially outward of the motor main body, and
board surfaces of the power board are inclined with respect to board surfaces of the control board.
2. The motor according to claim 1 , wherein at least a portion of the power board radially overlaps with the control board holder.
3. The motor according to claim 2 , wherein the control board holder includes a control board holding case that holds the control board, and
at least a portion of the power board radially overlaps with the control board holding case.
4. The motor according to claim 3 , wherein at least a portion of the power board axially overlaps with the control board.
5. The motor according to claim 4 , wherein
the board surfaces of the control board are orthogonal to the axial direction, and
the board surfaces of the power board are orthogonal to a radial direction.
6. The motor according to claim 1 , wherein
the control board holder includes a cover that covers a counter output side of the control board,
the power board case extends in the axial direction, and
a counter output side end portion of the power board case makes contact with an axial output side surface of the cover.
7. The motor according to claim 1 , further comprising:
a bus bar that electrically connects the power board and the motor main body, wherein
an axial output side end portion of the power board is located on an output side of the control board.
8. The motor according to claim 7 , wherein the control board holder includes the bus bar.
9. The motor of claim 7 , wherein a position where the bus bar and the power board are connected is on an output side of the rotation sensor.
10. The motor according to claim 1 , wherein
the control board holder includes a connector portion to be connected to an external power source, and
the connector portion and the power board are directly electrically connected to each other.
11. The motor according to claim 10 , wherein
the control board holder includes a conducting member that electrically connects the connector portion and the power board, and
the conducting member is positioned on an axial output side of the rotation sensor.
12. The motor according to claim 1 , wherein the control board holder includes a sensor magnet accommodating portion that surrounds the rotation sensor and the sensor magnet in a circumferential direction.
13. The motor according to claim 1 , wherein
the motor main body includes a bearing that supports the shaft,
the control board holder includes a bearing holding portion that holds the bearing, and
the bearing holding portion is positioned on an axial output side of the control board.
14. The motor according to claim 1 , wherein
the motor main body includes a bearing that supports the shaft, and
the sensor magnet is positioned on the counter output side of the bearing.
15. The motor according to claim 1 , wherein the control board holding unit includes:
a bus bar that electrically connects the power board and the motor main body;
a control board holding case that holds the control board; and
a bus bar holder that holds the bus bar.
16. The motor according to claim 15 , wherein the bus bar holder is positioned radially inward of the control board holding case.
17. The motor according to claim 15 , wherein the bus bar holder and the control board holding case are defined by a single monolithic member.
18. The motor according to claim 1 , further comprising:
an electronic component attached to an axial output side surface of the control board, wherein at least a portion of the electronic component is positioned radially outward of the sensor magnet.
19. The motor according to claim 18 , wherein
the control board holder includes an electronic component accommodating portion in which at least a portion of the electronic component is accommodated, and
at least a portion of the electronic component accommodating portion radially overlaps with the sensor magnet.
20. The motor according to claim 1 , wherein
the control board holder includes a connector portion to be connected to an external power source, and
the connector portion is positioned on the opposite side of the power board with respect to the center axis.
21. The motor according to claim 1 , wherein an axial output side end portion of the power board case is positioned on the output side of the motor main body.