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公开(公告)号：US3622862A
公开(公告)日：1971-11-23
申请号：US3622862D
申请日：1970-10-22
Applicant: ASEA AB
Inventor： BOKSJO CARL INGVAR
CPC classification number: H02M7/7575 , Y02E60/60 , Y10T307/724
Abstract: A static converter composed of a converter-transformer and a rectifier bridge connected thereto has a bypass member connected in parallel with the bridge. Two series-connected rectifiers in one phase of the bridge constitute a bypass path. A direct voltage source can be connected with said two bypass rectifiers, the source having such a polarity as to furnish a current in the conducting direction of the two rectifiers.
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公开(公告)号：US3614585A
公开(公告)日：1971-10-19
申请号：US3614585D
申请日：1969-12-15
Applicant: ASEA AB
Inventor： WEDIN KURT
Abstract: A power station is provided with a power machine driving an AC generator for feeding an HVDC power transmission plant, comprising a rectifier station in the power station and an inverter station at the other end of an HVDC line connected to the rectifier station. The power machine is controlled from a machine regulator to provide a desired rotational speed, while the converter stations of the HVDC transmission plant are controlled from a converter regulator to maintain a desired transmission magnitude. The machine regulator and the converter regulator are mutually connected and coordinated so that, in the first place, a change in the state of control of the HVDC plant is fed to the input of the machine regulator and, in the next place, a deviation between the state of control of the power machine and the actual number of turns of this machine influences the converter regulator so that the state of control of the converters is temporarily adapted to that of the power machine.
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公开(公告)号：US3614498A
公开(公告)日：1971-10-19
申请号：US3614498D
申请日：1970-11-16
Applicant: ASEA AB
Inventor： BANK HENNING , JILSEN PER-OWE , KLEIN HANS , PERSSON TAGE
CPC classification number: H02K3/51
Abstract: A rotor of a turbogenerator has a winding coil support which includes a retaining ring surrounding the coil ends of the rotor winding and shrunk onto the rotor body and onto a support ring arranged in the rotor body axially outside the coil ends. The support ring is formed by at least four coaxial metal rings arranged axially one after the other and radially gripped by the rotor body and the retaining ring.
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公开(公告)号：US3613941A
公开(公告)日：1971-10-19
申请号：US3613941D
申请日：1969-11-21
Applicant: ASEA AB
Inventor： KORANYI ROBERT
CPC classification number: B65D7/44 , Y10T29/49616 , Y10T29/49796
Abstract: In a transformer tank the bottom is strengthened by cutting out rectangular plates with tapered edges so that the plates have the shape of truncated pyramids. The plates are placed under the holes formed when the plates are cut out of the bottom, the largest flat surface of each plate facing the side of the bottom where each hole is smallest. The plates are then welded to the bottom.
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公开(公告)号：US3607639A
公开(公告)日：1971-09-21
申请号：US3607639D
申请日：1968-07-11
Applicant: ASEA AB
Inventor： SANTEN AART VAN , SAMSKOG LARS-ERIK , TORNBLOM LARS
CPC classification number: G21C3/3315 , G21C3/32 , G21C3/3305 , G21C3/332 , G21C3/334 , Y02E30/40
Abstract: A fuel assembly for nuclear reactors is formed of a plurality of substantially parallel fuel rods arranged between a top plate and a bottom member inside a sheathing tube. Spacer elements for these tubes are provided with leaf springs secured to the spacer frames, the free ends of the springs having buttons thereon engaging in holes in the sheathing tube to position the spacer elements in the tube.
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Patent Agency Ranking
公开(公告)号：US3601670A
公开(公告)日：1971-08-24
申请号：US3601670D
申请日：1970-04-20
Applicant: ASEA AB
Inventor： ERIKSSON LARS GORAN , GOLIATH KARL-GUNNAR , LARSSON BO INGEMAR
CPC classification number: H02P3/14
Abstract: A driving system adapted for regenerative braking having two DC motors each having two series wound field windings. The motors and one field winding from each motor are connected in a bridge circuit to a DC source to provide for changing from motor to generator conditions. the other two field windings are connected in series with each other and with the DC source in a diagonal of the bridge. The motors are controlled in response to the average value of motor current.
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公开(公告)号：US3584278A
公开(公告)日：1971-06-08
申请号：US3584278D
申请日：1968-11-25
Applicant: ASEA AB
Inventor： KRABBE ULRIK
CPC classification number: H02P27/026 , B66C13/26 , B66C2700/081 , H02P3/24 , H02P23/24 , H02P25/20 , H02P27/02
Abstract: A driving system for cranes includes a three phase asynchronous motor with a squirrel cage rotor and two stator windings with different numbers of poles. The speed is steplessly controllable within a lower speed range below the synchronous speed corresponding to the higher number of poles in response to the difference between actual and desired speed. This difference quantity passes unidirectional means which, depending on its sign, feeds it as a control signal to a delay angle current varying device inserted between the low speed stator winding and the network, or to a controlled DC source which, during operation in the lower speed range, is connected to the high speed winding, that is, the stator winding with a lower number of poles. This winding is by means of a throwover switch also connectable to the network, in which case the signal circuit of the delay angle current device is intended to be broken by means of a signal current breaker so that no current is fed to the low speed stator winding.
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48.发明授权Method and means for suppressing an a.c. component of a given frequency in a pulsed d.c. current 失效用于抑制脉冲直流电流中的频率分量的方法和手段
公开(公告)号：US3555437A
公开(公告)日：1971-01-12
申请号：US3555437D
申请日：1968-12-26
Applicant: ASEA AB
Inventor： PERSSON ERIK , GOLIATH KARL GUNNAR
Abstract: FOR SUPPLYING TO A MOTOR D.C. PULSES WITH A VARIABLE FREQUENCY WHILE SUPPRESSING AN A.C. COMPONENT OF A GIVEN FREQUENCY (F), A SWITCHING DEVICE IS CONNECTED BE TWEEN A SOURCE OF D.C. AND THE MOTOR, WHICH IS RENDERED ALTERNATELY CONDUCTING AND NONCONDUCTING SO AS TO SUPPLY THE MOTOR WITH PULSES IN GROUPS OF N PULSES PER GROUP. THE TIME INTERVAL BETWEEN THE GROUPS CAN BE VARIED, WHILE THE TIME INTERVAL $T BETWEEN SUCCESSIVE PULSES IN EACH GROUP IS KEPT CONSTANT AND EQUAL TO
1
F.N
AS LONG AS THE AVERAGE VALUE OF THE PULSE FREQUENCY IS BELOW THE VALUE AT WHICH THE TIME INTERVAL BETWEEN SUCCESSIVE GROUPS IS LESS THAN $T. AT HIGHER AVERAGE VALUES OF THE PULSE FREQUENCY, UP TO A CERTAIN PRESELECTED VALUE, THE PULSE LENGTH IS KEPT SUBSTANTIALLY CONSTANT, WHILE, IF THE LOAD VOLTAGE IS TO BE INCREASED ABOVE THAT CORRESPONDING TO SUCH PRESELECTED VALUE, THE PULSE LENGTH IS INCREASED WHILE THE PULSE FREQUENCY IS KEPT SUBSTANTIALLY CONSTANT.-
49.发明授权Control system for a static converter connecting a dc network to an ac network 失效用于将直流网络连接到交流网络的静态转换器的控制系统
公开(公告)号：US3551778A
公开(公告)日：1970-12-29
申请号：US3551778D
申请日：1968-11-27
Applicant: ASEA AB
Inventor： EKSTROM AKE
CPC classification number: H02M7/7575 , G16H20/40 , G16H40/63 , H02M7/521 , Y02E60/60
Abstract: 1,238,720. Static electrical converter systems. ALLMANNA SVENSKA ELEKTRISKA A.B. 29 Nov., 1968 [1 Dec., 1967], No. 56711/68. Heading H2F. A D.C. and an A.C. network are interconnected by a converter controlled so that each rectifier therein is supplied with a control pulse when the period after the last control pulse to the previous rectifier in the commutation sequence, is equal to the A.C. network period divided by the number of control pulses per A.C. cycle. A member 6 (Fig. 1) derives the network period T by measuring the time between two consecutive zero passages of a phase voltage to give T/2; and divides the period T by the converter pulse number n, where n is 6 in present example. The line voltages are taken out by a transformer 61 the output voltage of which is phase shifted by a unit 62 so that it passes through zero a certain time before the respective line voltages of the network, i.e. a suitable time before the next commutation. A member 5 measures the time t since the last pulse from a pulse generator 18, which controls rectifiers 11-16 via a ring counter 19. The outputs of .5 and 6 are fed to a summation member 4, the output of which is fed to a comparator 7. When the outputs from 5 and 6 are equal there is zero output from the summation member 4 and the comparator 7 will emit a signal which is fed via gates 8, 9 to the pulse generator. A control pulse is accordingly fed to the appropriate rectifier. The output from summation member 4 may be modified by a regulator circuit 3 to vary the delay angle a in dependence upon the difference between the magnitude of the converter direct current and a desired value. The converter direct current is detected by a unit 30 comprises an A.C. fed coil coupled to the D.C. line and a rectifier. The desired value is set up on a potentiometer 33 and the difference if any is fed via a control amplifier 31 to alter the moment of zero passage of the output voltage from member 4 and consequently the times t 1 , t 2 &c. between the control pulses from the pulse generator and the delay angles a are altered. Units 81, 91, limit the minimum and maximum delay angles α respectively. The minimum limit unit 81 is connected to the AND gate 8 and ensures that the signal from comparator 7 cannot be passed to the pulse generator until a certain minimum delay angle has been passed. The unit 91 is connected to an OR gate 9 and delivers a signal to the pulse generator at the maximum limit if the delay angle from comparator 7 is too large. Instead of having fixed minimum and maximum delay angles they may be selectively variable to give a desired minimum commutation voltage U K and minimum commutation margin angle # (Fig. 4, not shown). If the A.C. network is asymmetrically loaded the regulator will. cause different periods between successive firing pulses. Thus the limit units 81, 91, are arranged to influence-electronic switches 82, 92-respectively. For instance when the minimum limit unit 81 becomes active for the first of the rectifiers, it is arranged to close switch 82 which via a diode 83 discharges. to earth any positive regulator voltage for a certain time and prevents the ignition of two subsequent rectifiers earlier than would occur with symmetrical loading. If a pulse from comparator 7 arrives before a pulse from 81 then a positive pulse from the regulator should be discharged through switch 82. If the pulse from 81 arrives first the regulator voltage must pass freely to the member 4. A logic circuit to control the switch 82 (or 92) from comparator 7 and unit 81 (or 91) is illustrated Fig. 4 (not shown). Similarly too. high a direct current can cause a negative regulator voltage and cause an increase in angle a and when it reaches an upper limit set by unit 91 any negative regulator voltage is discharged through switch 92 and diode 93 to earth so that two succeeding rectifiers cannot ignite later than with an interval of 60 degrees.
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