公开(公告)号：US3584171A

公开(公告)日：1971-06-08

申请号：US3584171D

申请日：1968-12-26

Applicant: ASEA AB

Inventor： PUCHER WALTER

IPC: H01H33/75 ,  H01H33/68

CPC classification number: H01H33/75

Abstract: A high-voltage circuit breaker of the minimum liquid type includes an elongated extinguishing chamber with a central, longitudinal arc channel for the movable contact. A plurality of outlet channels lead from a pressure accumulating space having a closed gas-filled space to an exhaust channel. The outlet channels cross the arc channel and are released by the movable contact when the circuit breaker opens. The pressure accumulating space and the exhaust channel extend along the arc channel at substantially the same distance from the latter.

公开(公告)号：US3583186A

公开(公告)日：1971-06-08

申请号：US3583186D

申请日：1968-05-20

Applicant: ASEA AB

Inventor： ANDERSSON STURE

IPC: B21B37/50 ,  B21B37/52 ,  H02P5/48 ,  B21B37/06

CPC classification number: B21B37/50 ,  B21B37/52 ,  H02P5/485

Abstract: In rolling mills having at least two roller pairs with individual driving means there is a device for controlling the same, which device contains amplifiers for regulating the speed of the driving means. Between the roller pairs are arranged measuring devices to measure the position of the loop of material to be rolled, the output side of which is connected to the speed amplifier of a subsequent or preceding roller pair in the direction of rolling. This output side is also connected to the input side of the summator for subsequent and preceding measuring devices respectively.

公开(公告)号：US3582755A

公开(公告)日：1971-06-01

申请号：US3582755D

申请日：1969-10-09

Applicant: ASEA AB

Inventor： LISS GOTE ,  EKSTROM AKE ,  LJUNGQVIST ROLF

IPC: H02M1/08 ,  H02M7/155 ,  H02M7/757

CPC classification number: H02M7/7575 ,  Y02E60/60

Abstract: A static converter connecting an AC network with a DC line has a control system in which an AC control function voltage is derived from the AC network, while a DC regulator voltage is derived from a regulator. The control system further comprises a first arrangement for deriving the actual time between subsequent following control pulses for the valves of the converter and a second arrangement for deriving a desired value for said time corresponding to the relation between the period time of the AC network and number of pulses of the converter. The difference between said actual time and its desired value is stored in a memory circuit for each valve and as a correction magnitude taken together with the control function voltage and the regulator voltage.

公开(公告)号：US3577055A

公开(公告)日：1971-05-04

申请号：US3577055D

申请日：1968-06-03

Applicant: ASEA AB

Inventor： HERMANSSON FREDRIK

IPC: H02P3/14 ,  H02P5/04

CPC classification number: H02P3/14

Abstract: An arrangement for regenerative braking of a thyristorcontrolled DC series motor used as driving motor for street cars. During braking possible excess energy is consumed by a resistor connected in parallel with the motor. The resistor is connected in series with a switching means for connecting and disconnecting the resistor at an upper and lower voltage level, respectively.

公开(公告)号：US3575716A

公开(公告)日：1971-04-20

申请号：US3575716D

申请日：1967-12-11

Applicant: ASEA AB

Inventor： LINDSTROM OLLE

IPC: H01M8/08 ,  H01M27/12

CPC classification number: H01M8/08

Abstract: IN A FUEL CELL BATTERY WHICH COMPRISES ELECTRODES AND SPACES THEREBETWEEN AND ALSO OUTER SPACES OUTSIDE THE ELECTRODES FOR A COMBUSTIBLE SUBSTANCE OR OXIDANT RESPECTIVELY, THERE ARE TWO CHANNELS, ONE INLET AND ONE OUTLET CHANNEL. AT LEAST THE OUTLET CHANNEL IS ARRANGED AT AN ANGLE TO THE HORIZONTAL PLANE AND WITH ITS UPPERMOST PART CONNECTED TO A DEVICE FOR FEEDING BACK ELECTROLYTE TO THE INLET CHANNEL.

公开(公告)号：US3566248A

公开(公告)日：1971-02-23

申请号：US3566248D

申请日：1969-01-24

Applicant: ASEA AB

Inventor： KRABBE ULRIK

IPC: H02M5/27 ,  H02M5/16

CPC classification number: H02M5/271

Abstract: A FREQUENCY CONVERTER FOR CONVERTING AN ALTERNATING VOLTAGE OF A HIGHER FREQUENCY TO AN ALTERNATING VOLTAGE OF A LOWER FREQUENCY, THE CONVERTER INCLUDING AT LEAST TWO GROUPS OF MUTUALLY COMMUTATING RECTIFIERS, IS CONTROLLED BY A PILOT VOLTAGE GENERATOR WHICH GENERATES A VOLTAGE HAVING THE DESIRED AMPLITUDE AND FREQUENCY OF THE OUTPUT VOLTAGE OF THE CONVERTER. THE PILOT VOLTAGE IS COMPARED WITH A REFERENCE VOLTAGE DERIVED FROM THE INPUT VOLTAGE OF THE CONVERTER. THE COMPARISON IS USED TO GIVE THE DESIRED CONTROL ANGLE FOR THE RECTIFIERS IN EACH GROUP. THE CONTROL MEANS FOR EACH RECTIFIER INCLUDES AN INTEGRATING ARRANGEMENT INCLUDING A MEMORY DEVICE CONSTITUTED BY A CAPACITOR AND SWITCHING MEANS CONSTITUTED BY TRANSISTORS CONTROLLED BY THE INPUT VOLTAGE OF THE CONVERTER TO CONNECT THE MEMORY DEVICE ALTERNATELY TO THE PILOT VOLTAGE GENERATOR AND TO THE CONTROL CIRCUIT FOR THE RECITIFIER AT A RATE CORRESPONDING TO THE PERIOD LENGTH OF THE INPUT VOLTAGE DIVIDED BY THE PULSE NUMBER OF THE COMMUTATING GROUP.

公开(公告)号：US3559436A

公开(公告)日：1971-02-02

申请号：US3559436D

申请日：1968-10-28

Applicant: ASEA AB

Inventor： NILSSON JAN

IPC: B21C23/00 ,  B21C23/21 ,  F16J10/02 ,  B21C23/08

CPC classification number: B21C23/211 ,  B21C23/007 ,  F16J10/02

Abstract: A HYDRAULIC PRESS HAS A MAIN OPERATING CYLINDER WITH AN OPERATING PISTON SLIDABLE THEREIN AND AN EXTRUSION CYLINDER WITH A DIE AT ONE END AND AN EXTRUDING PISTON RIGID WITH THE OPERATING PISTON ENTERING THE OTHER END. THE EXTRUSION CYLINDER HAS A SHEATH WOUND AROUND IT, END PIECES ENCLOSING THE SHEATH AND SEALS BETWEEN THE END PIECES AND THE ENDS OF THE EXTRUSION CYLINDER. A RING ENGAGING THE UPPER END PIECE IS PRESSED DOWNWARD AGAINST IT BY AUXILIARY PISTONS SLIDABLE IN CYLINDERS FORMED IN THE OPERATING PISTON TO COMPRESS THE SEALS BETWEEN THE END PIECES AND THE ENDS OF THE CYLINDER.

公开(公告)号：US3555397A

公开(公告)日：1971-01-12

申请号：US3555397D

申请日：1969-04-23

Applicant: ASEA AB

Inventor： FRANK KJELL

IPC: H01J13/48 ,  H02M1/06 ,  H02M7/515 ,  H02M7/525 ,  H02P27/06 ,  H02M7/00 ,  H02M7/52

CPC classification number: H02P27/06 ,  H02M7/5152 ,  H02M7/525

Abstract: IN A THYRISTOR CURRENT CONVERTER HAVING A CONTROL PULSE DEVICE FOR DELIVERING CONTROL PULSES TO THE MAIN THYRISTORS, AND AT LEAST ONE EXTINGUISHING CIRCUIT FOR EXTINGUISHING EACH THYRISTOR AT THE END OF ITS CONDUCTING INTERVAL, AND HAVING AN OSCILLATOR FOR CONTROLLING THE OPERATING RATE OF THE CONTROL PULSE DEVICE AND THE EXTINGUISHING CIRCUIT, THE LOAD CURRENT IS RAPIDLY EXTINGUISHED BY AN ARRANGEMENT WHICH FIRST BLOCKS THE CONTROL PULSES TO THE MAIN

THYRISTORS AND SECOND REGULATES THE CONTROL SIGNAL APPLIED TO THE OSCILLATOR SO THAT THE OSCILLATOR FREQUENCY IS HIGHER DURING THE BLOCKING INTERVAL THAN IMMEDIATELY PRIOR THERETO. THE BLOCKING INTERVAL IS SUFFICIENT TO PERMIT THE EXTINGUISHING CIRCUIT TO EXTINGUISH ALL OF THE THYRISTORS.

公开(公告)号：US3555270A

公开(公告)日：1971-01-12

申请号：US3555270D

申请日：1968-04-22

Applicant: ASEA AB

Inventor： PERSSON ERIK

IPC: B61L3/00 ,  B61L3/22

CPC classification number: B61L3/221

Abstract: In electrically operated rail vehicles in which signals are inductively transmitted from rails to vehicle through coils applied in the vehicle, disturbances are avoided by pivoting said coil (preferably series-connected) to such an angle in relation to the plane of the rails that the resultant voltage from an asymmetrical current conductor is very low or zero. The same effect could also be accomplished by placing said coils horizontally and supplementing them by transverse coils.

公开(公告)号：US3551772A

公开(公告)日：1970-12-29

申请号：US3551772D

申请日：1967-11-27

Applicant: ASEA AB

Inventor： TOROK VILMOS ,  HANSSON CURT

IPC: G05B5/01 ,  H02P7/292 ,  G05B11/01 ,  H02P5/12

CPC classification number: G05B5/01 ,  H02P7/293 ,  Y10S388/902 ,  Y10S388/919