1
Peter Gravesen, Jens A Branebjerg: Miniature actuating device. Danfoss, Lee Mann Smith McWilliams Sweeney & Ohlson, September 26, 1995: US05452878 (207 worldwide citation)

A miniature actuating device with a carrier, a diaphragm, a hollow space formed between the carrier and the diaphragm and an insulating layer arranged between them and with two electrode terminals for producing an electrostatic field between the diaphragm and the carrier for an activated state. With ...


2
Helge S o slashed e Plougsgaard, Klaus Olesen: Power module for a frequency converter. Danfoss, Lee Mann Smith McWilliams Sweeney & Ohlson, July 18, 2000: US06091604 (114 worldwide citation)

Power module for a current converter, particularly a frequency converter, having at least one printed circuit board equipped at least with power components and having a heat-conducting connection with a wall of the current converter housing serving as heat sink, the power module having electrically ...


3
Josef Riedhammer: Apparatus for producing a rotary speed-dependent control pressure. Danfoss, Wayne B Easton, June 21, 1983: US04388941 (87 worldwide citation)

The invention relates to a device for producing a control pressure which corresponds to a rotary speed imparted to a shaft of a pump which is a part of the device. The device includes a measuring orifice formed by a fixed throttle and a control orifice formed by piston arrangement operating as a con ...


4
Steen Hornsleth, Jens Simonsen, J o slashed rgen Holst: Compressor with control electronics. Danfoss, Lee Mann Smith McWilliams Sweeney & Ohlson, March 28, 2000: US06041609 (82 worldwide citation)

The invention concerns a hermetic cooling compressor with an electric motor having a variable speed controlled by a converter cooled by a cooling medium flow. The compressor and the converter are formed together as a unit, in which a medium flowing through the unit is used for cooling of the electro ...


5
Knud V Valbjorn: Control arrangement for a refrigeration apparatus. Danfoss, Wayne B Johnson Clayton R Easton, July 21, 1992: US05131237 (79 worldwide citation)

A refrigeration system having compressor controls responsive to the heat load on the system. Each selected evaporator of the system has a thermostatic switch unit which includes an associated temperature sensor in proximity to the evaporator. The thermostatic switch unit has an operating range with ...


6
Joern Poulsen: Motor controller incorporating an electronic circuit for protection against inrush currents. Danfoss Drives, McCormick Paulding & Huber, May 23, 2006: US07050278 (75 worldwide citation)

Inrush currents in the dc intermediate circuit of a motor controller necessitate the incorporation of protection circuits. These circuits usually take the form of a resistor inserted in series with the intermediate circuit, and the resistor is short-circuited after completion of inrush by a switch p ...


7
Kenneth Skaug, Michael Toennes, Nils Ole Harvest, Egon Krogh, Andreas Aupke: Frequency converter for different mains voltages. Danfoss Drives, McCormick Paulding & Huber, May 22, 2007: US07221121 (68 worldwide citation)

The invention is directed to controlling an electric motor by means of a frequency converter. The frequency converter can be connected to one of several different mains voltages. According to the present invention, the maximum output power of the frequency converter, is limited when the actual mains ...


8
Eik Sefeldt Møller: Method for regulating a delivery variable of a pump. Danfoss, Lee Mann Smith McWilliams Sweeney & Ohlson, March 12, 2002: US06354805 (68 worldwide citation)

In a known method for regulating a delivery variable of a pump, which is driven by an electric motor operated with alternating current of variable frequency, especially via a converter, the input power of the motor is measured as the actual value for the delivery variable and is regulated by compari ...


9

10
Jian M Wu: AC/DC unity power-factor DC power supply for operating an electric motor. Danfoss, Lee Mann Smith McWilliams Sweeney & Ohlson, November 28, 1995: US05471125 (66 worldwide citation)

A unity power factor power supply for an electric motor. A switch-mode circuit is employed which, in a first mode, transfers power from AC main to a constant voltage DC bus. In a second mode, power generated on the DC bus is fed back to the main power supply. The circuit of the invention automatical ...