Miniature fan or micro-fan
First Claim
1. A miniature fan or micro-fan which comprises a fan housing (22;
-
68;
112;
150) through which a substantially annular air duct (114;
152) extends in the axial direction, there being arranged in a central region of the air duct (114;
152) a carrier hub (64;
118;
156) which carries the internal stator (72;
122) of an electronically commutated external-rotor motor (28, 30;
70;
158;
202) whose external rotor (80;
160), equipped with at least one permanent magnet (86), carries an impeller wheel (130;
162) that is arranged rotatably in the air duct (114), and comprising a circuit board configuration (32;
90, 94;
134;
163) which comprises a motor region (34;
42) that is arranged in the central region of the air duct between the carrier hub (64;
118) and the internal stator (122), and carries at least one galvanomagnetic rotor position sensor (36;
44) that is controllable by the magnetic field of the permanent magnet (86) provided on the external rotor, which comprises a component region (50;
138) for the reception of electronic components (96;
170) of the external-rotor motor, which component region is arranged substantially outside the air duct (114;
152); and
which comprises a bridge portion (40;
48;
136;
174) by way of which the motor region (163) of the circuit board configuration is electrically connected to the component region (168).
1 Assignment
0 Petitions
Accused Products
Abstract
A miniature fan or micro-fan (200) features a fan housing (150) through which a substantially annular air duct extends in the axial direction, there being arranged in a central region of the air duct an electronically commutated external-rotor motor (202) whose external rotor, equipped with at least one permanent magnet (86), carries an impeller wheel (204) that is arranged rotatably in the air duct. A circuit board configuration (168) has a motor region that is arranged in the central region of the air duct and carries at least one galvanomagnetic rotor position sensor that is controllable by the magnetic field of the permanent magnet (86) provided on the external rotor. The board has a component region for the reception of electronic components (170) of the external-rotor motor, which component region is arranged substantially outside the air duct, and which comprises a bridge portion, via which the motor region of the circuit board configuration is electrically connected to the component region (168).
54 Citations
19 Claims
-
1. A miniature fan or micro-fan
which comprises a fan housing (22; -
68;
112;
150) through which a substantially annular air duct (114;
152) extends in the axial direction,there being arranged in a central region of the air duct (114;
152) a carrier hub (64;
118;
156) which carries the internal stator (72;
122) of an electronically commutated external-rotor motor (28, 30;
70;
158;
202) whose external rotor (80;
160), equipped with at least one permanent magnet (86), carries an impeller wheel (130;
162) that is arranged rotatably in the air duct (114),and comprising a circuit board configuration (32;
90, 94;
134;
163)which comprises a motor region (34;
42) that is arranged in the central region of the air duct between the carrier hub (64;
118) and the internal stator (122), and carries at least one galvanomagnetic rotor position sensor (36;
44) that is controllable by the magnetic field of the permanent magnet (86) provided on the external rotor,which comprises a component region (50;
138) for the reception of electronic components (96;
170) of the external-rotor motor, which component region is arranged substantially outside the air duct (114;
152); and
which comprises a bridge portion (40;
48;
136;
174) by way of which the motor region (163) of the circuit board configuration is electrically connected to the component region (168). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
68;
-
14. A miniature fan or micro-fan
which comprises a fan housing (22; -
68;
112;
150) through which a substantially annular air duct (114;
152) extends in the axial direction, that housing being connected via at least one carrier member to a carrier hub (64;
118;
156)that is arranged in a central region of the air duct (114;
152) and carries the internal stator (72;
122), comprising an annular winding (76;
126;
164) and implemented as a claw-pole stator, of an electronically commutated external-rotor motor (28, 30;
70;
158) whose external rotor (80;
160), equipped with at least one permanent magnet (86), carries fan blades (130;
162) that are arranged in the air duct (114),and comprising a circuit board configuration (32;
90, 94;
134;
163)which comprises a motor region (34;
42) that is arranged on the radially inner side of the air duct between the carrier hub (64;
118) and the claw-pole stator (122), is adapted for electrical connection to the annular winding (76;
126;
164) of the claw-pole stator, and carries at least one galvanomagnetic rotor position sensor (36;
44) that is controllable by the magnetic field of the at least one permanent magnet (86) provided on the external rotor,which comprises a component region (50;
138) for the reception of electronic components (96) of the external-rotor motor, which component region is arranged substantially outside the air duct; and
which comprises a bridge portion (40;
48;
136;
174) by way of which the motor region (163) of the circuit board configuration is electrically connected to the component region (168). - View Dependent Claims (15, 16, 17, 18, 19)
-
68;
Specification