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| Number | Title | Issue Date |
| 6933687 | Dual motor configuration with primary brushless motor and secondary integrated speed control motor A dual motor configuration 10 is provided for driving two fans for moving air to cool an engine. The dual motor configuration includes a primary brushless motor 18 constructed and arranged to be electronically controlled to drive a first fan 16 ... | 08/23/2005 |
| 6900563 | Self-retained RFI suppression choke for electric motor A choke 20 is provided for suppressing radio-frequency interference of a brush-type motor. The choke includes a single wire having a portion wound about a coil axis A to define a plurality of coils 24 including two outermost coils 26 and 28 | 05/31/2005 |
| 6888328 | Quasi bipolar topology for brushless motors A circuit 100 for a five phase DC brushless motor includes a first coil A and a first primary switch S1 for controlling current through the first coil; a second coil B and a second primary switch S3 for controlling current through the second coi... | 05/03/2005 |
| 6874990 | Integral tip seal in a fan-shroud structure A fan-shroud structure 10 includes a fan 12 mounted for rotation about an axis B. The fan has a plurality of blades 20 with tips of the blades being coupled to an annular band 22. A shroud 26, including an annular labyrinth seal | 04/05/2005 |
| 6859992 | Method of providing a heat shield in an electric motor A method provides a heat shield on an electric motor. The motor has a housing and an endcap coupled to an end of the housing. The endcap includes a bearing pocket constructed and arranged to cover a bearing structure. The method includes coupling a heat shield direc... | 03/01/2005 |
| 6838847 | Stall protection based on back EMF detection A method of detecting a rotor condition of a dc motor is provided. The motor 14 is part of a motor control circuit 10 having a free-wheeling diode 20 in parallel with the motor 14. The method establishes a threshold voltage for back emf v... | 01/04/2005 |
| 6832644 | Cooling module with air dams An engine cooling module 10 which includes a shroud 12, a heat exchanger 18, a fan 14, a motor 13 for driving fan 14, and a plurality of air dams 1. Shroud 12, circumscribing the fan, has a main opening to allo... | 12/21/2004 |
| 6812605 | Self-retained RFI suppression choke for electric motor A choke 20 is provided for suppressing radio-frequency interference of a brush-type motor. The choke includes a single wire having a portion wound about a coil axis A to define a plurality of coils 24 including two outermost coils 26 and 28. ... | 11/02/2004 |
| 6809484 | Multiple electronically commutated motor control apparatus and method A cooling system includes multiple cooling fans, each driven by a corresponding fan motor controller. Each fan motor controller includes electronic commutation circuitry that is responsive to a modulated signal to control the speed of the associated motor and fan. T... | 10/26/2004 |
| 6803735 | Speed-based open-loop start-up method for brushless DC motor A method of starting a brushless DC motor 12 at any initial speed (A) establishes a initial stator-field speed and setting a counter of synchronization, (B) measures a speed of a rotor of the motor, (C) compares the speed of the rotor with the stator-field sp... | 10/12/2004 |
| 6801009 | Current limitation process of brush and brushless DC motors during severe voltage changes A closed-loop control system for a DC motor includes a DC motor 12, a current sensor 14 for determining a current of the motor, a voltage sensor 32 for measuring a voltage of the motor 12, and a micro-controller 33. The micro-contr... | 10/05/2004 |
| 6798162 | 12/42 volt DC brush motor control system A system 10 provides a variable output voltage to a DC brush motor. The system includes a DC brush motor 14, a DC voltage source 12, a step-up, step-down DC/DC converter 16 including a switch 18. The DC/DC converter is constructed ... | 09/28/2004 |
| 6781360 | Jump bar shunt structure for power components A jump bar shunt structure 30 includes a base 32 constructed and arranged to be mounted to a substrate and to function as a current shunt; a pair of first legs 34 and 36 integral with the base and being constructed and arranged to be conn... | 08/24/2004 |
| 6774587 | Multiple brush-type motor control apparatus and method A motor circuit includes a first brush-type motor, a second brush-type motor, a switch, and a pulse width modulation circuit. The first brush-type motor has a first voltage connection and a second voltage connection, the second voltage connection adapted to be coupl... | 08/10/2004 |
| 6756754 | Integrated one touch up and down windowlift motor with direct sense for anti-pinch A windowlift control system 10 is provided for controlling movement of a window of a vehicle. The system 10 includes a DC bush motor 12 constructed and arranged to cause movement of the window up and down, and electronics 14 integral with... | 06/29/2004 |
| 6740992 | Electric motor torsional decoupling A motor assembly 10 includes a DC motor 12 having a motor housing 14 defining a stator, a rotor assembly 18 supported for rotational movement with respect to the stator, and a shaft 22 coupled to the rotor assembly for rotation abo... | 05/25/2004 |
| 6737780 | Electric motor magnetic flux path structure An electric motor 10 has an armature 12 including windings 14. The armature is constructed and arranged to rotate a shaft 16. The motor includes a commutator 18 and a brush card assembly 20 having brushes to engage the commu... | 05/18/2004 |
| 6707220 | Electric motor brush holder for suppressing audible and electromagnetic noise A brush holder 10 is provided for holding a hammer brush 12 of an electric motor. The brush holder includes a single piece of wire bent to define a brush-engaging portion 14 define an opening 15, and a torsion spring structure 16 c... | 03/16/2004 |
| 6674962 | Limited-pool random frequency for DC brush motor low frequency PWM speed control A motor control system 10 includes an engine cooling module 14 including a DC motor 12. The system includes a switch 18 constructed and arranged to be controlled by a pulse width modulated (PWM) signal 26. The switch 18 is operatively associated with the ... | 01/06/2004 |
| 6674198 | Electric motor with integrated heat shield An electric motor structure includes an electric motor having a housing and an endcap coupled to an end of the housing. The endcap includes a bearing pocket constructed and arranged to cover a bearing structure. The motor structure also includes a heat sh... | 01/06/2004 |
| 6630805 | Actively controlled regenerative snubber for unipolar brushless DC motors An actively controlled regenerative snubber configuration for use in unipolar brushless direct current motors comprises a first inductor, a first switch and a capacitor, all of which are connected in series to a positive voltage supply and in parallel wit... | 10/07/2003 |
| 6617744 | DC motor brush card assembly having attaching structures and multiple choke coils with elongated portions A choke 10, for suppressing radio-frequency interference of a brush-type motor, includes a single wire having a portion 15 wound about a coil axis A to define a plurality of coils 14 including two outermost coils 16 and 18. An attaching structure 20 exten... | 09/09/2003 |
| 6597135 | Combination of resistor and PWM electronic device to control speed of a permanent magnet DC motor A motor speed control system 10 includes a permanent magnet direct current electric motor 12. A first switch 14 is operatively associated with the motor. A resistive element 16 is provided in series with the motor and the first switch. A second, pulse wid... | 07/22/2003 |
| 6590356 | Combination of resistor and PWM electronic device to control speed of a permanent magnet DC motor A motor speed control system 10 includes a permanent magnet direct current electric motor 12. A first switch 14 is in series with the motor. A circuit 15 is in series with the first switch 14. The circuit 15 includes a resistor 16 and a second, pulse widt... | 07/08/2003 |
| 6554230 | Engine cooling shroud having lead trough and motor lead wire locator associated with lead trough A shroud 100 is provided for carrying an electric motor 118 of an engine cooling assembly. The motor 118 has a lead wire assembly 128 to control the operation of the motor. The shroud includes a frame 112 defining an opening 114 there through. A motor mou... | 04/29/2003 |
| 6428277 | High speed, low torque axial flow fan An axial flow fan 10 for producing airflow through an engine compartment of a vehicle includes a hub rotatable 12 about an axis 22. An annular band 16 is concentric with the hub and spaced radially outward from the hub. A plurality of fan blades 14 are di... | 08/06/2002 |
