1
David M Erdman: Refrigeration system and control therefor. General Electric Company, Ralph E Krisher Jr, March 29, 1977: US04015182 (89 worldwide citation)

A refrigeration system is disclosed as comprising a compressor driven by an electronically commutated D.C. motor for circulating a suitable coolant through a condenser and then an evaporator disposed within a chamber or compartment to be cooled. The system is particularly adapted for use as an air c ...


2
David M Erdman: Electronically commutated motor systems and control therefor. General Electric Company, Joseph E Papin, July 10, 1984: US04459519 (87 worldwide citation)

Electronically commutated motor and control arrangements particularly adapted for use with refrigeration systems and methods of operating refrigeration systems are disclosed. In one form, a fan control means is provided for responding to temperature of a compartment being cooled by a refrigeration s ...


3
David M Erdman, James A Beatty, Amritlal H Patel: Control circuits, electronically commutated motor systems and methods. General Electric Company, Ralph E Krisher Jr, June 11, 1991: US05023527 (79 worldwide citation)

Control circuit for an electronically commutated motor which has a rotatable assembly and further has a stationary assembly with a plurality of winding stages having terminals for energization, and switches for applying a voltage to one or more of the terminals of the winding stages at a time and co ...


4
David M Erdman: Control system, method of operating an electronically commutated motor, and laundering apparatus. General Electric Company, Ralph E Krisher Jr, March 31, 1987: US04654566 (69 worldwide citation)

A control system for an electronically commutated DC motor having a rotatable assembly and a stationary assembly with a plurality of winding stages. The application of a DC voltage to the winding stages is controlled to provide an effective voltage thereto by commutating the winding stages to apply ...


5
David M Erdman: Control system, electronically commutated motor system, blower apparatus and methods. General Electric Company, Ralph E Krisher Jr, August 9, 1988: US04763347 (65 worldwide citation)

Control system for an electronically commutated motor having a stationary assembly with a plurality of winding stages and further having a rotatable assembly. The control system is adapted to be supplied with an externally derived first pulse width modulated series of pulses having a first duty cycl ...


6
David M Erdman: Motor controls, refrigeration systems and methods of motor operation and control. General Electric Company, Ralph E Krisher Jr, December 27, 1994: US05376866 (64 worldwide citation)

A method of operating a brushless motor having a stationary assembly with at least two different energizable windings for producing spaced apart magnetic fields in time sequence, and a rotor adapted to rotate in response to the magnetic fields. The method includes the steps of simulating rotor posit ...


7
David M Erdman, Harold B Harms: Laundering apparatus, method of operating a laundry machine, control system for an electronically commutated motor, method of operating an electronically commutated motor, and circuit. General Electric Company, Joseph E Papin, June 28, 1983: US04390826 (62 worldwide citation)

A method of operating a laundry machine. The machine has a pair of rotatable components and is driven by an electronically commutated motor having a stationary assembly with a plurality of winding stages and also having a rotatable assembly adapted to be selectively coupled to at least one of the ro ...


8
David M Erdman: Electronically commutated motor and method of making same. General Electric Company, Ralph E Krisher Jr, January 25, 1977: US04005347 (60 worldwide citation)

A brushless DC motor is constructed with photosensitive devices for detecting rotor shaft position. Arcuate permanent magnets on the rotor provide a DC flux field while distributed stator windings, each spanning a fixed number of slots in the armature assembly, provide mutually perpendicular magneti ...


9
William R Archer, Roger C Becerra, Brian L Beifus, Mark A Brattoli, David M Erdman, Thomas M Jahns, Gerald B Kliman, Wen Liang Soong, Charles M Stephens, Eric R Benedict, Michael W Degner: Quadrature axis winding for sensorless rotor angular position control of single phase permanent magnet motor. General Electric Company, Enrique J Mora, August 18, 1998: US05796194 (59 worldwide citation)

A single phase permanent magnet motor includes a rotor, a stator, and a quadrature axis winding positioned out-of-phase from a main winding of the stator for generating an output signal representative of rotor angular position. An integrator can be coupled to the quadrature axis winding for phase re ...


10
William R Archer, Roger C Becerra, Brian L Beifus, Mark A Brattoli, David M Erdman, Thomas M Jahns, Gerald B Kliman, Wen Liang Soong, Charles M Stephens, Eric R Benedict, Michael W Degner: Quadrature axis winding for sensorless rotor angular position control of single phase permanent magnet motor. General Electric Company, Damian Wasserbauer, Senniger Powers Leavitt & Roedel, November 16, 1999: US05986419 (56 worldwide citation)

A single phase permanent magnet motor includes a rotor, a stator, and a quadrature axis winding positioned out-of-phase from a main winding of the stator for generating an output signal representative of rotor angular position. An integrator can be coupled to the quadrature axis winding for phase re ...