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WO/2000/019105A1 |
A multiple centrifugal air compressor system control (100) designed to maintain the optimum operating conditions for a centrifugal air compressor (105) operating in a compressed air system while still supplying compressed air at a select...
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WO/2000/015949A1 |
In an apparatus having a structure such that the angle of a rotary blade (5) of a rotating body (6) can be changed while the blade (5) rotates, a screw (2) moving linearly according to rotation of a direction adjustment motor (1) is form...
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WO/2000/010244A1 |
In order to regulate the rotational speed of a fan (L) without exerting any influence resulting from oscillation and interference effects, a circuit evaluating a commutating impulse on the supply lines of the fan (L) is provided. Said ci...
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WO/2000/006910A1 |
A rotation device (901) comprises: (a) a rotor shaft with a rotor; (b) a stator; (c) an electric motor (903) integrated with the device (902) and comprising a motor stator and a motor rotor, which motor rotor is coupled via the rotor sha...
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WO/1999/067519A1 |
The invention relates to a device for compressing a gaseous medium, comprising a compressor unit provided with a medium inlet, an outlet for the compressed medium and with means for the atomising of a liquid evaporation agent in the medi...
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WO/1999/064667A1 |
The invention relates to a control system for a pump and a method of controlling said pump. The vacuum pump arrangement utilized in the invention may be used e.g. in paper, paperboard and pulp dryers and e.g. in various suction filters a...
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WO/1999/060272A1 |
A device and method for evacuation capable of evacuating, for example, a vacuum chamber (process chamber) of a semiconductor manufacturing device, comprising the vacuum chamber (10), an exhaust pipe (34) for joining the vacuum chamber (1...
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WO/1999/054628A1 |
The invention aims at providing a method and a device that eliminate as far as possible insecurity in determining surge limit during operation, reasonably and cost-effectively reduce measurement requirements involved in solving the above...
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WO/1999/051866A2 |
A compression system endwall bleed system having a plurality of bleed slots (41) formed in a mechanical housing (38) downstream of a rotating shrouded rotor (35). In one embodiment, the plurality of bleed slots (41) bleed off a separated...
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WO/1999/047815A1 |
The present invention relates to an axial compressor for aircraft engines that comprises at least two stages arranged in series. The compressor is fitted with a system for deactivating a portion of the stages, i.e. one or more of the las...
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WO/1999/042240A1 |
A method and apparatus is provided for diagnosing and correcting rotating stall and surge in rotating machines (20) by monitoring dynamic shaft precession as the machine approaches a destabilizing condition when indicated by the comparis...
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WO/1999/040325A1 |
The invention relates to method and device (1) for regulating at least one delivery quantity of a compressor unit (2) driven by an electric drive motor, such as the volume flow, the pressure and/or the temperature of a medium delivered b...
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WO/1999/022146A1 |
A suction flow preswirl control bypass structure for blowers, adapted to attain the reduction of shaft power thereof, an increase of the amount of pressure rise of a fluid by an impeller of the blower, the improvement in the efficiency o...
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WO/1999/009642A1 |
There is described a circuit for controlling the operation of a fan. The circuit operates to control the speed of the fan and to provide the means to monitor fan malfunctioning.
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WO/1999/004325A1 |
A pressure for a chamber is regulated by controlling either the exhaust pressure at the exhaust side of a first vacuum pump or the internal pressure at a compression stage of the first vacuum pump, where the first vacuum pump is directly...
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WO/1999/004171A1 |
A drive controller for controlling the drive of a high-speed rotating body which can easily attain the interchangeability between different types of machines without providing any circuit for limiting the interchangeability between the d...
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WO/1998/059201A1 |
The invention is an appliance converting the analogue signal into blows of air. A block diagram is shown in the figure. A blowphone is composed of an interface (1) which converts analogue signal into voltage controlling an electric motor...
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WO/1998/045934A1 |
A fan cooler for electric or electronic sub-assemblies has a control circuit with a control stage for controlling the speed of rotation of a fan motor connected to the control stage depending on set values. To achieve a polyvalent operat...
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WO/1998/040629A1 |
A vacuum pumping apparatus which supplies water into a reservoir at high speed, and has a stable and steady water storage capacity and a high electric power saving efficiency. The apparatus essentially comprises vacuum control means (4) ...
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WO/1998/040613A1 |
For means of reducing turbocharger lag when increased power is required from a so-equipped engine (7) operating at part load, its compressor (8) is provided with nozzles or directing devices (3) designed to increase the speed of the roto...
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WO/1998/037328A1 |
A ceramic substrate (32), to which a sliding resistance face (20) of a potentiometer is secured by baking, is fixed on a common base (30) having a printed wiring board, and the circuit on the printed wiring board and the potentiometer ar...
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WO/1998/032972A1 |
To reduce a loss by exhibiting an exhaust performance to the maximum when a temperature of a rotary vane is within an allowable value, maintain the exhaust performance by suppressing a variation in the number of revolutions of a turbo mo...
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WO/1998/030790A2 |
A motor-driven compressor assembly (10) comprises a compressor air intake (20), a compressed rotor (11), a compressed air outlet (31), and an electric motor (14) for the compressor rotor (1), with the air intake (20) of the compressor as...
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WO/1998/017917A1 |
In blowers for air-conditioning systems, a rotor shaft of a fan impeller is secured axially by means of additional components, such as a thrust washer or the like, which have to be installed on one end of the rotor shaft after the assemb...
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WO/1998/016747A1 |
An enhanced map width compressor in which an impeller wheel (2) is mounted for location within a chamber defined by a housing (1) between an inlet and an outlet, the wheel including blades (4) each of which sweeps across an inner surface...
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WO/1998/012435A1 |
Reduction in energy loss, noise and vibration at the time of a small flowrate operation of a centrifugal compressor is realized and an operating flowrate on the side of small flowrates is increased in range. A flow control device (7) for...
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WO/1998/009066A1 |
A variable flow gas turbine engine (50) has, in axial flow relationship, a fan assembly (52), a core engine (54), and an exhaust assembly (58). The core engine (54) includes a compressor (62), a combustor (64), a high pressure turbine (6...
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WO/1998/005867A1 |
The invention concerns a centrifugal ventilation device (1) comprising at least one delivery outlet (20) and at least two fluid intakes (2, 3) arranged on either side of a ventilating wheel (4) capable of being driven in rotation by driv...
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WO/1998/004835A1 |
The invention relates to the process for regulating a unit driven by a three-phase motor such as a pump or a compressor, including a side channel compressor, with feeding features like volume flow and differential pressure. The three-pha...
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WO/1997/047929A1 |
Ventilation systems are generally known. For example in the agricultural field, in industry, for general use or for specific processes, etc. Besides the aforesaid communication means the processor module (1) of the aforesaid ventilator (...
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WO/1997/044719A1 |
A method for controlling working fluid surge in a centrifugal compressor (12, 14). According to the method, surge detection is accomplished by calculing the time rate of change of first and second compressor operating parameters; compari...
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WO/1997/038270A1 |
A surge detection system for use in a fluid system having a load driven by a centrifugal compressor (12), the compressor (12) being driven by an electric motor (20). The surge detection system comprises a means (38, 40) for sensing a dif...
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WO/1997/028370A1 |
A turbomachinery driving apparatus using a dual inverter system and a method of controlling the same, wherein a main control unit for controlling the two inverters is omitted, and an external communication unit for transmitting signals r...
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WO/1997/024512A1 |
A control system (20) prevents recurrence of surge in a dynamic compressor (11). An anti-surge valve (12) bypasses flow and is operated by the control system between a low limit and a full open position. The low limit is initially establ...
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WO/1997/024591A1 |
A surge prevention control system for use with a dynamic compressor (11) provides a multiple module controller (20) for operating an anti-surge valve (12) to bypass flow around the dynamic compressor (11). The multiple module controller ...
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WO/1997/010019A1 |
A method of flow estimation during CPAP treatment is disclosed and involves measuring turbine (32) speed by means of the motor's Hall-effect sensors (80). The equivalent pressure, pest, that would be developed by the turbine (32) for tha...
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WO/1997/005383A1 |
A wet-rotor hydronic heating/cooling circulator in which a check valve (30) is positioned at the inlet eye (16) of the pump impeller (18), where it can easily be serviced by removing the circulator motor (10) and impeller (18). The check...
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WO/1997/002082A1 |
Methods and apparatus for close coupled mounting of a pair of series connected turbines (40, 41) by axially aligning and abutting the axial outlet (50) of one turbine (40) against the axial inlet (42) of the other turbine (41) with a sea...
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WO/1997/001270A1 |
A milking apparatus comprises a vacuum pump (1), a milking device (6) having at least one milking means (7, 12, 13) provided to be attached to an animal to be milked, and a conduit (5) connecting the milking means (7, 12, 13) to a suctio...
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WO/1997/000381A1 |
A technique for controlling compressor stall and surge is disclosed. In a gas turbine engine, static pressure asymmetry is sensed at a plurality of locations along the circumference of the compressor inlet. Time rate of change of the mas...
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WO/1996/039583A1 |
The present invention relates to a method of controlling the function of a centrifugal pump and vacuum pump combination, and a gas-separating centrifugal pump. The method according to the invention is characterized in that the gas flow i...
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WO/1996/037707A1 |
Solenoid valves (16, 17), which permit a fluid to flow in the direction for compression, are provided in a suction pipe (7) and a discharge pipe (9) of a turbocompressor (1). One end of a bypass pipe (20) is connected between the solenoi...
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WO/1996/037034A1 |
The cooling of the drive motor (1) is to be improved in such a drive system. To this end, there is a slipping friction clutch (4-11) dependent upon the revolution speed of the motor and centrifugal force between the motor shaft (2) and t...
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WO/1996/037033A1 |
The cooling of the drive motor (1) is to be improved in such a drive system. To this end, there is a slipping clutch (4-12) dependent upon the revolution speed of the motor and centrifugal force between the motor shaft (2) and the fan wh...
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WO/1996/037035A1 |
In a drive for railway vehicles and guided vehicles the cooling of the drive motor (8) is to be improved. To this end, there is an electromagnetic revolution speed limiting and regulating device (5-7) between the motor shaft (3) and the ...
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WO/1996/034207A1 |
A pressure sensor (12) is located in the compressor stage of a gas turbine engine (10) to provide a pressure signal (PR1) that shows the compressor flow characteristics. The pressure signal (PR1) is applied to a bandpass filter (16) with...
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WO/1996/030649A1 |
The invention relates to a circulating blower, a vacuum pump or a similar machine with a housing (2), a rotor (3) fitted therein and rotor bearings (6, 7). For the early detection especially of bearing damage, it is proposed that a struc...
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WO/1996/018848A1 |
The invention concerns a control circuit for a vehicle heater fan drive motor. The control circuit comprises a voltage divider which emits a signal (S) representative of the supply voltage to a microcomputer (12) where the measuring sign...
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WO/1996/018236A1 |
A device is proposed for regulating the speed of an electric motor of a fan or pump, in particular in a vehicle's heating system. The device comprises an actual speed sensor (22, 24, 28, 30) which produces an actual speed signal whose fr...
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WO/1996/013947A1 |
An automatic control system for controlling the firmness of a fluid supported mattress (14) of a bed assembly (10). The control system includes a motorized fluid pump, a control unit (44) for operating the pump to adjust the firmness of ...
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