Abstract: To improve the EMC performance of an electronic device on which a motor is mounted.

Abstract: A centrifugal fan allows good or inferior condition of soldering on the back surface of a circuit board to be visually inspected, includes a secondary casing 130, the secondary casing 130 including a connector housing 190 having opening portion 191 at a lateral side thereof and a connector pin 192 embedded thereinside, wherein one end of the connector pin 192 protrudes inside of the connector housing 190, and the other end of the connector pin 192 penetrates the circuit board 135 and is soldered to the circuit board 135, thereby forming solder fillets 195a and 195b between the front and back surfaces of the circuit board 135 and the connector pin 192, a gap 139 is arranged between the secondary casing 130 and the part of the circuit board 135 where connector pin 192 penetrates, a through hole for visual inspection is arranged in a bottom wall portion of the secondary casing so as to see the fillet formed between the back surface of the circuit board and the connector pin.

Abstract: A centrifugal fan allows good or inferior condition of soldering on the back surface of a circuit board to be visually inspected, includes a secondary casing 130, the secondary casing 130 including a connector housing 190 having opening portion 191 at a lateral side thereof and a connector pin 192 embedded thereinside, wherein one end of the connector pin 192 protrudes inside of the connector housing 190, and the other end of the connector pin 192 protrudes from a bottom surface of the secondary casing 130, penetrates the circuit board 135 and is soldered to the circuit board 135, thereby forming solder fillets 195a and 195b at a corner part of the front and back surfaces of the circuit board 135 and the connector pin 192, a gap 139 is arranged between the secondary casing 130 and the part of the circuit board 135 where connector pin 192 penetrates, the solder fillet formed between the back surface of the circuit board and the connector pin is located in the gap, and the solder fillet 195b of the connector pi

Abstract: A circuit board for a motor unit equipped with a motor includes a substrate having a main surface being one of a pair of surfaces opposed to each other, and a back surface being another of the pair of surfaces, a magnetic detection element disposed in a predetermined region on an outer periphery side of the substrate on the main surface, and configured to output a detection signal in accordance with a position of a rotor of the motor, and a metal member formed between the outer periphery of the substrate and the magnetic detection element in the predetermined region on the main surface, and configured to receive a supplied ground voltage.

Abstract: To improve the EMC performance of an electronic device on which a motor is mounted.

Abstract: A circuit board for a motor unit equipped with a motor includes a substrate having a main surface being one of a pair of surfaces opposed to each other, and a back surface being another of the pair of surfaces, a magnetic detection element disposed in a predetermined region on an outer periphery side of the substrate on the main surface, and configured to output a detection signal in accordance with a position of a rotor of the motor, and a metal member formed between the outer periphery of the substrate and the magnetic detection element in the predetermined region on the main surface, and configured to receive a supplied ground voltage.

Abstract: An impeller of this disclosure includes a hub having a ring shape; and a plurality of blades that are provided on an outer periphery of the hub, wherein the blade has a trailing edge formed such that an inner side of a radial width of the blade is curved in a direction opposite to a rotation direction, in a plan view as viewed in a direction of a rotation axis.

Abstract: There is provided a fan apparatus having a high-strength structure for supporting an impeller and a motor with good air quantity characteristics. The fan apparatus has a motor, an impeller, a motor base portion, a frame and a plurality of spoke portions. The impeller has a plurality of blades and are arranged to be rotated by the motor. The motor base portion supports the motor. The frame has an annular inner peripheral wall formed to surround the impeller as viewed from a rotation axis direction. The spoke portions connect the motor base portion and the frame. An end portion of the blade in the side of the frame is inside the inner peripheral wall and a blade portion having a length not less than half the length of the blade in the rotation axis direction is exposed, as viewed from a direction perpendicular to the rotation axis direction.

Abstract: An impeller of this disclosure includes a hub having a ring shape; and a plurality of blades that are provided on an outer periphery of the hub, wherein the blade has a trailing edge formed such that an inner side of a radial width of the blade is curved in a direction opposite to a rotation direction, in a plan view as viewed in a direction of a rotation axis.