| 
            
              US4654566A
              (en)
            
            *
            
           | 
          1974-06-24 | 
          1987-03-31 | 
          General Electric Company | 
          Control system, method of operating an electronically commutated motor, and laundering apparatus 
        | 
        
        
          | 
            
              US4169990A
              (en)
            
            *
            
           | 
          1974-06-24 | 
          1979-10-02 | 
          General Electric Company | 
          Electronically commutated motor 
        | 
        
        
          | 
            
              US5023527A
              (en)
            
            *
            
           | 
          1974-06-24 | 
          1991-06-11 | 
          General Electric Company | 
          Control circuits, electronically commutated motor systems and methods 
        | 
        
        
          | 
            
              US5227704A
              (en)
            
            *
            
           | 
          1974-06-24 | 
          1993-07-13 | 
          General Electric Company | 
          Motor controls, refrigeration systems and methods of motor operation and control 
        | 
        
        
          | 
            
              US4459519A
              (en)
            
            *
            
           | 
          1974-06-24 | 
          1984-07-10 | 
          General Electric Company | 
          Electronically commutated motor systems and control therefor 
        | 
        
        
          | 
            
              US5075608A
              (en)
            
            *
            
           | 
          1974-06-24 | 
          1991-12-24 | 
          Erdman David M | 
          Control system, electronically commutated motor system, draft inducer apparatus and method 
        | 
        
        
          | 
            
              USRE35124E
              (en)
            
            *
            
           | 
          1974-06-24 | 
          1995-12-19 | 
          General Electric Company | 
          Control system, electronically commutated motor system, draft inducer apparatus and method 
        | 
        
        
          | 
            
              US4162435A
              (en)
            
            *
            
           | 
          1976-10-05 | 
          1979-07-24 | 
          General Electric Company | 
          Method and apparatus for electronically commutating a direct current motor without position sensors 
        | 
        
        
          | 
            
              US4238717A
              (en)
            
            *
            
           | 
          1977-05-23 | 
          1980-12-09 | 
          Nu-Tech Industries, Inc. | 
          Optimum efficiency rotary machine having synchronous operation at a selectable speed 
        | 
        
        
          | 
            
              US4492903A
              (en)
            
            *
            
           | 
          1977-05-23 | 
          1985-01-08 | 
          Nu-Tech Industries, Inc. | 
          Optimum efficiency brushless DC motor 
        | 
        
        
          | 
            
              US4275343A
              (en)
            
            *
            
           | 
          1978-12-28 | 
          1981-06-23 | 
          The Charles Stark Draper Laboratory, Inc. | 
          Back EMF controlled permanent magnet motor 
        | 
        
        
          | 
            
              US4262237A
              (en)
            
            *
            
           | 
          1979-06-08 | 
          1981-04-14 | 
          General Motors Corporation | 
          Commutatorless direct current motor drive system 
        | 
        
        
          | 
            
              JPS56121398A
              (en)
            
            *
            
           | 
          1980-02-29 | 
          1981-09-24 | 
          Fuji Elelctrochem Co Ltd | 
          Method of controlling rotation of brushless motor in digital control system 
      | 
        
        
          | 
            
              US4513230A
              (en)
            
            *
            
           | 
          1980-04-17 | 
          1985-04-23 | 
          General Electric Company | 
          Laundering apparatus, method of operating a laundry machine, control system for an electronically commutated motor, and method of operating an electronically commutated motor 
        | 
        
        
          | 
            
              US4532459A
              (en)
            
            *
            
           | 
          1980-04-17 | 
          1985-07-30 | 
          General Electric Company | 
          Laundering apparatus, method of operating a laundry machine, control system for an electronically commutated motor and method of operating an electronically commutated motor 
        | 
        
        
          | 
            
              US4429262A
              (en)
            
            
            
           | 
          1980-09-12 | 
          1984-01-31 | 
          Technicare Corporation | 
          Three phase motor oscillatory servo control 
        | 
        
        
          | 
            
              US4382199A
              (en)
            
            *
            
           | 
          1980-11-06 | 
          1983-05-03 | 
          Nu-Tech Industries, Inc. | 
          Hydrodynamic bearing system for a brushless DC motor 
        | 
        
        
          | 
            
              US4400654A
              (en)
            
            *
            
           | 
          1981-03-27 | 
          1983-08-23 | 
          Magnetic Peripherals Inc. | 
          Digital speed control for a brushless DC motor 
        | 
        
        
          | 
            
              DE3151257A1
              (de)
            
            *
            
           | 
          1981-12-24 | 
          1983-07-07 | 
          Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | 
          Synchronantrieb 
        | 
        
        
          | 
            
              US4494051A
              (en)
            
            *
            
           | 
          1982-03-05 | 
          1985-01-15 | 
          The Garrett Corporation | 
          Multi-quadrant brushless DC motor drive 
        | 
        
        
          | 
            
              DE3209392C2
              (de)
            
            *
            
           | 
          1982-03-15 | 
          1983-12-22 | 
          Georg Schick Dental GmbH, 7957 Schemmerhofen | 
          Kollektorloser Gleichstrommotor mit einem Permanentmagnet-Rotor 
        | 
        
        
          | 
            
              JPS58172994A
              (ja)
            
            *
            
           | 
          1982-04-02 | 
          1983-10-11 | 
          Sony Corp | 
          ブラシレスモ−タ 
        | 
        
        
          | 
            
              US4528485A
              (en)
            
            *
            
           | 
          1982-04-13 | 
          1985-07-09 | 
          General Electric Company | 
          Electronically commutated motor, method of operating such, control circuit, laundry machine and drive therefor 
        | 
        
        
          | 
            
              DE3306642A1
              (de)
            
            *
            
           | 
          1983-02-25 | 
          1984-09-13 | 
          Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | 
          Verfahren zur fortschaltung des staenderdrehfeldes einer synchronmaschine 
        | 
        
        
          | 
            
              US4642537A
              (en)
            
            *
            
           | 
          1983-12-13 | 
          1987-02-10 | 
          General Electric Company | 
          Laundering apparatus 
        | 
        
        
          | 
            
              US4540921A
              (en)
            
            *
            
           | 
          1984-04-19 | 
          1985-09-10 | 
          General Electric Company | 
          Laundry apparatus and method of controlling such 
        | 
        
        
          | 
            
              US4636936A
              (en)
            
            *
            
           | 
          1984-04-19 | 
          1987-01-13 | 
          General Electric Company | 
          Control system for an electronically commutated motor 
        | 
        
        
          | 
            
              US4642536A
              (en)
            
            *
            
           | 
          1984-04-19 | 
          1987-02-10 | 
          General Electric Company | 
          Control system for an electronically commutated motor, method of controlling such, method of controlling an electronically commutated motor and laundry apparatus 
        | 
        
        
          | 
            
              JPS61132064A
              (ja)
            
            *
            
           | 
          1984-11-29 | 
          1986-06-19 | 
          Sony Corp | 
          ブラシレスモ−タ 
        | 
        
        
          | 
            
              US4564794A
              (en)
            
            *
            
           | 
          1985-05-23 | 
          1986-01-14 | 
          International Business Machines Corporation | 
          Phase locked loop and a motor control servo 
        | 
        
        
          | 
            
              US4868479A
              (en)
            
            *
            
           | 
          1985-10-15 | 
          1989-09-19 | 
          The Charles Stark Draper Laboratory, Inc. | 
          Low loss permanent magnet motor 
        | 
        
        
          | 
            
              US5619871A
              (en)
            
            *
            
           | 
          1985-11-12 | 
          1997-04-15 | 
          General Electric Company | 
          Laundry machine 
        | 
        
        
          | 
            
              US4835839A
              (en)
            
            *
            
           | 
          1985-11-12 | 
          1989-06-06 | 
          General Electric Company | 
          Method of fabricating a salient pole electronically commutated motor 
        | 
        
        
          | 
            
              CA1323650C
              (en)
            
            *
            
           | 
          1985-11-12 | 
          1993-10-26 | 
          Franklin Lee Forbes | 
          Electrically commutated motor having an edgewise wound yoke 
        | 
        
        
          | 
            
              DE3602227A1
              (de)
            
            *
            
           | 
          1986-01-25 | 
          1987-07-30 | 
          Philips Patentverwaltung | 
          Kommutierungsschaltung fuer einen kollektorlosen gleichstrommotor 
        | 
        
        
          | 
            
              US5266855A
              (en)
            
            *
            
           | 
          1986-03-06 | 
          1993-11-30 | 
          Fisher & Paykel, Limited | 
          Electric motor for clothes washing machine drive 
        | 
        
        
          | 
            
              US4684866A
              (en)
            
            *
            
           | 
          1986-04-16 | 
          1987-08-04 | 
          General Motors Corporation | 
          Adaptive controller for a motor vehicle engine throttle operator 
        | 
        
        
          | 
            
              US4856286A
              (en)
            
            *
            
           | 
          1987-12-02 | 
          1989-08-15 | 
          American Standard Inc. | 
          Refrigeration compressor driven by a DC motor 
        | 
        
        
          | 
            
              US4851755A
              (en)
            
            *
            
           | 
          1988-03-01 | 
          1989-07-25 | 
          Ampex Corporation | 
          Low power stepper motor drive system and method 
        | 
        
        
          | 
            
              US4859921A
              (en)
            
            *
            
           | 
          1988-03-10 | 
          1989-08-22 | 
          General Electric Company | 
          Electronic control circuits, electronically commutated motor systems, switching regulator power supplies, and methods 
        | 
        
        
          | 
            
              US5066300A
              (en)
            
            *
            
           | 
          1988-05-02 | 
          1991-11-19 | 
          Nu-Tech Industries, Inc. | 
          Twin replacement heart 
        | 
        
        
          | 
            
              US5204595A
              (en)
            
            *
            
           | 
          1989-01-17 | 
          1993-04-20 | 
          Magnetek, Inc. | 
          Method and apparatus for controlling a walking beam pump 
        | 
        
        
          | 
            
              US5079494A
              (en)
            
            *
            
           | 
          1989-05-23 | 
          1992-01-07 | 
          Thor Technology Corporation | 
          Fast response motor current regulator 
        | 
        
        
          | 
            
              US5015927A
              (en)
            
            *
            
           | 
          1989-08-04 | 
          1991-05-14 | 
          Thor Technology Corporation | 
          Electric motor with regeneration current commutation 
        | 
        
        
          | 
            
              US5256949A
              (en)
            
            *
            
           | 
          1989-05-23 | 
          1993-10-26 | 
          Thor Technology Corporation | 
          AC power line current regeneration 
        | 
        
        
          | 
            
              US4988939A
              (en)
            
            *
            
           | 
          1989-08-04 | 
          1991-01-29 | 
          Thor Technology Corporation | 
          Electric motor with variable commutation delay 
        | 
        
        
          | 
            
              US5068582A
              (en)
            
            *
            
           | 
          1990-05-29 | 
          1991-11-26 | 
          A. O. Smith Corporation | 
          Brushless pulsed D.C. motor 
        | 
        
        
          | 
            
              US5099182A
              (en)
            
            *
            
           | 
          1990-09-20 | 
          1992-03-24 | 
          Nu-Tech Industries, Inc. | 
          Brushless DC motor powered fogging apparatus 
        | 
        
        
          | 
            
              US5289092A
              (en)
            
            *
            
           | 
          1991-08-05 | 
          1994-02-22 | 
          Harnischfeger Corporation | 
          Apparatus and method for d.c. motor control 
        | 
        
        
          | 
            
              US5221881A
              (en)
            
            *
            
           | 
          1991-10-03 | 
          1993-06-22 | 
          Sgs-Thomson Microelectronics, Inc. | 
          Method and apparatus for operating polyphase DC motors 
        | 
        
        
          | 
            
              US5306988A
              (en)
            
            *
            
           | 
          1991-10-03 | 
          1994-04-26 | 
          Sgs-Thomson Microelectronics, Inc. | 
          Method and apparatus for operating polyphase dc motors 
        | 
        
        
          | 
            
              US5512805A
              (en)
            
            *
            
           | 
          1991-10-03 | 
          1996-04-30 | 
          Sgs-Thomson Microelectronics, Inc. | 
          Method and apparatus for determining reverse rotation of a polyphase DC motor 
        | 
        
        
          | 
            
              GB2301462A
              (en)
            
            *
            
           | 
          1993-12-14 | 
          1996-12-04 | 
          Psc Inc | 
          Motor control system especially for control of an optical scanner 
        | 
        
        
          | 
            
              US5565750A
              (en)
            
            *
            
           | 
          1995-08-30 | 
          1996-10-15 | 
          The Louis Allis Company | 
          Apparatus for applying field excitation to a synchronous electric motor 
        | 
        
        
          | 
            
              US5739652A
              (en)
            
            *
            
           | 
          1996-12-20 | 
          1998-04-14 | 
          General Motors Corporation | 
          Method and apparatus for sensorless operation of brushless permanent magnet motors 
        | 
        
        
          | 
            
              US5821660A
              (en)
            
            *
            
           | 
          1997-03-05 | 
          1998-10-13 | 
          Mts Systems Corporation | 
          Brushless direct current motor having adjustable motor characteristics 
        | 
        
        
          | 
            
              EP1834402A1
              (en)
            
            *
            
           | 
          2005-01-07 | 
          2007-09-19 | 
          Ronald De Four | 
          A self starting method and an apparatus for sensorless commutation of brushless dc motors 
        | 
        
        
          | 
            
              US8664905B2
              (en)
            
            *
            
           | 
          2010-02-26 | 
          2014-03-04 | 
          Pratt & Whitney Canada Corp. | 
          Control of brushless motor 
        | 
        
        
          | 
            
              JP5434696B2
              (ja)
            
            *
            
           | 
          2010-03-08 | 
          2014-03-05 | 
          株式会社デンソー | 
          車両用発電機 
        | 
        
        
          | 
            
              US9628009B2
              (en)
            
            *
            
           | 
          2011-10-27 | 
          2017-04-18 | 
          Briggs & Stratton Corporation | 
          Method for monitoring and controlling engine speed 
        | 
        
        
          | 
            
              US11233451B2
              (en)
            
            *
            
           | 
          2019-05-31 | 
          2022-01-25 | 
          Texas Instruments Incorporated | 
          Methods and apparatus to bypass sensed signals in power converters 
        |