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Class 323/910 - TWO OF THREE PHASES REGULATED


Subclass of Class 323 - Electricity: power supply or regulation systems
Definition: Art collection of disclosures including a three-phase system
No. of patents: 16
Last issue date: 06/18/2002


NumberTitleIssue Date
6407536Power conversion equipment and control device for the power conversion equipment
A power conversion equipment capable of dealing with an imbalance fault by changing characteristics of a filter for extracting negative-phase-sequence voltage in a steady state and at the time of a system fault, and a control device for the conversion equ...
06/18/2002
5202621Current transformer arrangement for three-wire three-phase systems to detect the actual current value for controlled DC loads powered via power converters
In a current transformer arrangement for three-wire three-phase systems, use is made of a single busing transformer (4) arranged on the three-phase side. Two of the total of three phase conductors are pushed through the bushing transformer, specifically e...
04/13/1993
5128604Two phase power control of a three-phase load circuit
A three-phase transformer is supplied by a three-phase AC line voltage. Two phases are connected via switches comprising head-to-tail connected thyristors. The third phase is connected directly to the transformer. The switches are of the zero voltage swit...
07/07/1992
5121048Feedback control system for static volt ampere reactive compensator with thyristor controlled reactances
An improved control system for static volt ampere reactance compensator provides for a transformation of the three phases into a two-variable system which thus isolates any common mode in the associated delta. Improved control is provided by utilizing the...
06/09/1992
4683413Reducing power consumption and monitoring synchronous running of three-phase electric motors
A control system for a three-phase motor has two triac switches connected in respective supply lines to the motor. Both switches are initially closed so that power is supplied to the motor on all three lines. After a predetermined time, when the motor has...
07/28/1987
4659974Controlling electrical phase connections to a three-phase device
A control circuit is connected between a three-phase power supply and a motor and ensures the correct application of phase signals to the motor, regardless of the way in which the control circuit is connected to the power supply. A first output signal of ...
04/21/1987
4645997Transient free solid state automatic power factor correction
In an apparatus for controlling the power factor of a power distribution system connected to inductive loads, banks of delta connected capacitors are added to or removed from the power lines of the power distribution system by a plurality of solid state s...
02/24/1987
4618817Multiple phase switching circuit and heat sink structure
A multiple phase electricity switching apparatus having electrical components arranged and mounted on a heat sink structure which having the same external dimensions as a conventional electromagnetic relay. The switching apparatus controls the amount of e...
10/21/1986
4449091Power controlling circuit for automatic regulating apparatus
A power controlling circuit for automatic temperature regulator or the like using a zero voltage switching control. Clocks are dispersed and selected, in accordance with control factor, from among the clocks synchronized with the load power supply when ze...
05/15/1984
4333046Power factor control of a three-phase induction motor
First and second input currents to a three-phase AC induction motor of either delta or wye winding configuration are directly regulated by a pair of phase-triggered, gate-controlled, semiconductor switches series-inserted between the motor and two phases ...
06/01/1982
4320336Circuit arrangement for the on-off switching of a line voltage to and from a load
A circuit arrangement contains an oscillator for producing high frequency pulses, a gate circuit, a pulse transformer and a triac. The high frequency pulses can be connected to the primary winding of the transformer by way of the gate circuit. The seconda...
03/16/1982
4242625Energy economizer for polyphase induction motors
A standard three phase induction motor starts with all three of its input connections connected to the three phase power line. Two of these connections are through triacs which remain continously conducting below said motor's particular most energy-effici...
12/30/1980
4117349Solid state alternating current switching device
A solid state alternating current switching device is described having a pair of series connected triacs in which the individual breakover voltages of the triacs are less than the peak line voltage and the sum of the individual breakover voltages is great...
09/26/1978
4103324Saturable reactor-type power supply
Power supply of the saturable reactor type is disclosed. The improvement is the inclusion of a variable impedance network, such as a pair of opposed semiconductor controlled rectifiers, in series with the current winding of the saturable reactor. Also inc...
07/25/1978
4101819Three phase controlling system
In a three phase load controlling system two bilateral switching circuits control the current in the first and the third phases; the first phase is later than the third. The second phase is uncontrolled. The gating signals applied to the bilateral switchi...
07/18/1978
4072880Starting control apparatus for AC load
A starting control apparatus for an AC load includes a bidirectional triode thyristor switching device connected in series between an AC power source and the load, a rectifying circuit connected in parallel to the bidirectional triode thyristor switching ...
02/07/1978
 
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