| Patents for H02P 4 - Arrangements specially adapted for regulating or controlling the speed or torque of electric motors that can be connected to two or more different voltage or current supplies (242) |
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| 04/16/1998 | DE19705672A1 Antrieb für eine Vakuumpumpe Drive for a vacuum pump |
| 03/25/1998 | EP0831582A2 Device for interfacing a consumer to the supply network voltage |
| 01/21/1998 | EP0820136A2 Power supply circuit for an air conditioner |
| 01/21/1998 | CN1170854A Air conditioner |
| 01/13/1998 | US5708572 Switched-mode power supply |
| 11/19/1997 | EP0808017A1 Air conditioning apparatus usable for wide-range source voltage |
| 08/28/1997 | DE19606363A1 Rotating flashing alarm lamp e.g. for police and fire-fighting vehicles |
| 07/29/1997 | US5652825 Power supply for low-voltage DC motor |
| 08/21/1996 | EP0727062A1 Switched-mode power supply |
| 08/13/1996 | US5545965 Three phase motor operated from a single phase power supply and phase converter |
| 04/24/1996 | CN1121276A Motor operation controller and insulation type bidirectional DC voltage converter |
| 04/11/1996 | DE19524005A1 Motorbetriebsregler und bidirektionaler Isolations-Gleichspannungsumformer Engine operating controls and bidirectional isolation Gleichspannungsumformer |
| 02/29/1996 | DE4429884A1 Load voltage-to-supply voltage matching arrangement e.g. for electronic device cooling cabinet compressor AC drive motor |
| 02/27/1996 | US5493868 Air conditioning apparatus usable for wide-range source voltage |
| 05/11/1995 | WO1995012840A1 Switched-mode power supply |
| 05/10/1995 | EP0652634A2 Air conditioning apparatus usable for wide-range source voltage |
| 04/26/1995 | EP0650248A2 Power supply |
| 09/29/1994 | DE4310044A1 Circuit arrangement for generating an adjustable, controlled direct voltage for a control unit of a device which is operated by three-phase current, in particular of a three-phase asynchronous motor |
| 08/31/1994 | EP0613236A1 Device for operating an electromotor drive of a refrigerating unit for electrical installation cabinets |
| 04/30/1992 | DE4135276A1 Current supply circuit for universal motor - has circuit which detects effective value of supply AC voltage applied also power determination circuit |
| 06/06/1990 | EP0371236A2 Current supply unit |
| 06/15/1989 | DE3740767A1 Hermetically encapsulated refrigerating compressor |
| 03/01/1989 | EP0304574A1 Power supply device for a variety of connectable tools |
| 02/16/1989 | DE3744733A1 Electrical power supply device having various electric tools which can be connected thereto |
| 06/16/1987 | US4673850 Universal motor control system |
| 04/21/1987 | US4659976 Method and apparatus for maximizing utilization of an electric motor under load |
| 06/24/1986 | CA1206522A1 Mains voltage discrimination device |
| 10/08/1985 | US4546305 For adapting a load to a lower or an upper alternating voltage range |
| 04/23/1985 | US4513237 Energy efficient multi-phase dual voltage electric motor |
| 12/27/1984 | EP0129133A1 Power supply circuit for electrical apparatuses with automatic mains supply selection |
| 12/11/1984 | US4488100 Motor controller |
| 08/15/1984 | EP0115857A1 Means for supplying power to electrical apparatuses in a railway vehicle |
| 07/31/1984 | US4463269 Pump drive circuit |
| 01/18/1984 | EP0098647A1 Mains-voltage discrimination device |
| 11/08/1983 | US4414500 Variable motor speed control |
| 06/07/1983 | US4387330 Balanced single phase alternating current induction motor |
| 05/11/1983 | EP0078497A1 Pump drive circuit |
| 06/29/1982 | CA1126805A1 Control circuit for a direct current motor including a triac |
| 11/25/1980 | US4236103 Control circuit for a direct current motor |
| 10/14/1980 | US4228388 Control circuit responsive to utility voltage level |
| 01/04/1977 | US4001668 Electric shaver operable from a wide range of supply voltages |
| 02/24/1976 | US3940680 A.C. - D.C. power converter for D.C. load |