Патент USA US2128094код для вставки
Aug. 23,1938. J. F. KOVALSKY: . , 2,123,094 VIBRATING TYPE REGULATOR Filed Nov. 24. 1937 WITNESSES: INVENTOR 7 ?w2M5~ Joseph F/ToI/a/Jk - 8 5 Patented Aug. 23, 1938 2,128,094 UNITED STATES PATENT ‘OFFICE’ 2,128,094 VIBRATING TYPE REGULATOR Joseph F. Kovalsky, Turtle Creek, Pa., assignor _ . to Westinghouse Electric & Manufacturing‘ Company, East Pittsburgh, Pa., a corporation of Pennsylvania Application November 24, 1937, Serial No. 176,239 6 Claims. (Cl. 171-229) My invention relates to vibrating regulators, upon a predetermined energization_of the core l2, su?icient to oppose the pull of the spring IS, such as are used for governing the excitation of r) a dynamo-electric machine to maintain an elec tric quantity, such as voltage, at a predetermined value.‘ In such regulators, a vibrating relay is the armature is moved to a circuit-interrupting position. A secondary relay Il may be provided having a core l8 and an armature i9 carrying a movable a regulating resistor, or a portion thereof, to contact member 2i that is adapted to engage a ?xed contact member ‘22 to close a circuit vary the resistance in circuit with the field wind ing of the generator alternately above and below ' through conductors 23 and 2| in shunt relation 10 the correct resistance value for maintaining the to the ?eld controlling resistor 5. A spring 25 10 caused to operate to intermittently short circuit regulated quantity at the desired value. The ef iective value of the resistor is determined by the ratio between the intervals of time during which the resistor is short circuited and the intervals 15 of time during which the short circuit is removed. It is' desired to provide such regulators with means for anticipating the corrective action caused by a change in the ?eld excitation of the generator prior to a completion of this action at 20. the terminals of the generator, in order to prevent over-travel in the corrective in?uence. Such'cor rective forces or anti-hunting means have in the past been determined in small regulators by the voltage drop across the ?eld resistor which varies 25 as the necessity of different ?eld current value varies, as would be the case when the voltage or load on the generator changes. It is an object of my invention to provide a generator voltage regulator having anti-hunting 30 means for in?uencing the primary relay control is provided for biasing the armature l9‘ to a cir cuit interrupting position, the armature being moved to a circuit closing position by the mag netizing in?uence of the core it upon engage ment of the primary relay contact members H 15 and ii to complete a circuit from the source of energy 26 through the secondary relay winding 21. An energy storing device, illustrated as a con denser 28, is connected between a junction point p 29 in the ?eld winding circuit and a junction 20 point 30 in the primary relay control circuit. The junction point 29 lies between the ‘generator ?eld winding 4 and the ?eld controlling resistor 5, and the junction point 30 is between the pri mary relay winding ‘I, and the control circuit 25 resistor I. It will be appreciated that the energization of the primary relay core by the winding 1 is a measure of the voltage between the supply con ductors 2 and 3. If the voltage between con 30 ductors 2 and 3 falls below the desired value, the element to provide the same amount of anti hunting over the entire load and voltage range pull of the spring it will be greater than the de creased pull on the relaycore caused by ener to be controlled. Other objects and advantages of my invention gization‘thereof by the winding 1 and will e?fect will appear from the following description of the engagement of the primary relay contact 35 members It and I5. This causes operation of one preferred embodiment thereof, reference be ing had to the accompanying drawing in which ' the secondary relay I‘! to its circuit-closing posi tion to shunt the control resistor 5 from the ?eld the single ?gure is a diagrammatic view illus winding circuit and apply a voltage thereto cor trating the same. ' responding to the voltage between the supply con Referring to the drawing, a direct-current gen 4O ' erator is illustrated having an armature winding ductors 2 and 3. The increase in voltage applied to the gen I, connected ‘to supply circuit conductors 2 and 3 and a ?eld winding 4 connected between these erator ?eld winding causes the voltage output from the armature winding I to increase, thus conductors in series with a ?eld controlling re increasing the voltage between supply conductors J sistor 5. Means for controlling the ?eld excita tion is provided comprising a primary relay 8 2 and 3 and the energization of the primary re having a winding 1, one terminal of which is lay winding 1, which upon a predetermined valuev connected to the supply conductor 2 and the of generator voltage, will move the armature l3 other terminal of which is connected through a against the bias of the spring I‘ to separate the control circuit resistor 8 to the supply conductor contact members it and I5, thus causing the 3. The primary relay 6 also comprises a core , deenergizationof the secondary relay I‘! to in terrupt the circuit through the relay contact 12 and an armature l3 carrying a movable con tact member II that is adapted to engage a ?xed members 2| and 22' in shunt relation to the reg contact member ii. The armature i3 is biased ulating resistor 5 to ‘reintroduce this resistor in 55 by a spring It to a contact‘engaging position and . series circuit relation with the generator ?eld 56 8,128,094 winding 4 to again decrease the energization thereof. This intermittent vibratory action con itinues in a well-known manner to alternately shunt the control resistor 5 from the ?eld wind ing circuit and reintroduce it into the ?eld wind ing circuit for short intervals of time, the ratio of time between the exclusion of the resistor 5 from the ?eld winding circuit and the inclusion of the resistor I in the circuit determining the effective 10 value of the resistor U in controlling the current in the winding 4. _ The description of the operation of the regu lating system thus far made has neglected the e?ect of the condenser 28 which is charged to a 15 degree depending upon the voltage impressed across its terminals. If the voltage across the terminals of the condenser 28 is maintained con stant for a short interval of time, until the charge on the condenser 2| has adjusted itself to a value 20 corresponding to the terminal potential, no charg ing or discharging current will ?ow. If we assume ‘ that the conductor 2 is the positive conductor and the conductor 8, the negative conductor, and contact members II and I! and the secondary relay contact members 2i and 22 are brought into engagement and separated from engagement at earlier times in the regulating cycle upon a de crease or increase, respectively, in the voltage of the regulated generator on account of the stabiliz ing or anti-hunting action of a charging current ?owing to the condenser 28 and a discharging current flowing from the condenser 28, as above described. This stabilizingior anti-hunting ac tion is independent of the load on the regulated generator and is the same for all conditions of the circuit within the limits for which the regu later is adjusted. ~ Many modi?cations in the arrangement of parts will occur to those skilled in the art within the spirit or my invention and I do not wish to be limited otherwise than by the scope of the ap pended claims. ‘ in I claim as my invention: 1. In a regulator system, a dynamo-electric machine for supplying unidirectional current to circuit supply conductors and‘ provided with a ?eld winding, a ?eld energizing circuit including said ?eld winding and a ?eld controlling resistor 25 tacts in their illustrated or circuit-opening posi-, 1 connected in series between said supply conduc tion, no'charging current is ?owing to or from tors, a primary relay 'for intermittently short cir the condenser 20, the generator voltage will de crease in the manner above described until the ouiting said resistor tor controlling the eilective primary relay 8 closes its contacts to cause the value thereof, a control circuit including the op erating winding of said primary relay and a con 30 30 secondary relay l1 to connect the junction point trol circuit resistor, and anti-hunting means com 2| to the supply conductor 3 through secondary prising a condenser connected from aJunction relay contact members 2| and 22. Upon the clos ing oi’ the secondary relay contact members the point between the ?eld winding and the regulat potential between the junction points 28 and Il ing resistor and a junction point between the pri is changed by the voltage drop appearing across mary relay winding and the control circuit re 35 the resistor 8, thus causing charging current to 2. In a regulator system, a dynamo-electric ?ow from conductor 2 through the relay winding ‘I and the condenser 20 to the supply conductor I, machine for supplying unidirectional current to‘ which charging current starts to flow immediately supply circuit conductors and provided with a ?eld winding, a ?eld energizing circuit including upon the engagement oi’ the secondary relay con 40 tact members 2i and 22 or before an appreciable said ?eld winding connected to one of said con increase in the generator voltage has had time ductors and a ?eld regulating resistor between to result from the increased potential applied to said ?eld winding and the other of said supply the ?eld winding I due to the inherent time lag conductors, a regulating relay having a winding for intermittently short circuiting said control characteristics of the ?eld winding. This charg 45 ing current increases the energization of the resistor, a control circuit for connecting said relay winding ‘I to a value sufficient to cause relay winding to the ?rst named of said icon separation of the contact members I‘ and Ill ductors and including a control circuit resistor between said relay winding and the other of said prior to the time that this would occur if con trolled by the voltage between supply conductors conductors, and a condenser connected between 2 and I alone, thus introducing a stabilizing or said ?eld winding and said relay winding. 3.'In a regulator system, a dynamo-electric anti-hunting action into the regulator to limit the machine for supplying unidirectional current and amount of over-travel in the voltage between con provided with a ?eld winding, a ?eld energizing ductors 2 and 2. ‘ The separation or the contact members II and circuit including said ?eld winding and a ?eld 55 it causes the separation of the secondary relay \ controlling resistor connected in series between the terminals oi said thmamo-electric machine. contact members 2i and 22, to reintroduce the regulating means including a relay for e?ecting resistor i in circuit with the ?eld winding l and,, at the same time, to reestablish the potential the intermittent short circuiting of said ?eld con resistor, a control circuit including the 00 ,di?erence between Junction points 2! and 30 trolling winding of said relay and a control circuit re which are the terminals of the condenser 2!, to their former value, thus causing the charge that sistor connected in series between the terminals oi’ said dynamo-electric machine, and energy has been established on the condenser 22 to dis means connected between said'} ?eld wind sipate itself by a current ?owing in the opposite storing ing and said relay winding that is responsive to direction, or ~from condenser 28 through the relay ' a change in the voltage supplied to said ?eld winding 1 in a direction opposite to the ?ow or .winding Ior ei‘lecting a stabilizing current through that for an instant represented by the relay con sistor. the regulating component of current through that winding between conductors 2 and 3. This causes a decrease in the energization of the winding ‘I iaster than it would ‘occur were it controlled solely by the decreasing potential between con ductors 2 and I resulting from the reintroduction , , ' the relay winding. '4. In a regulating system, a dynamo-electric machine having a ?eld winding, an energizing 70 circuit for said ?eld winding, means for control ling t‘ne energization'oi said ?eld winding com prising a regulating relay having a winding con . of the control resistor 5 in circuit with the ?eld ‘ nected between the terminals 0! said machine, winding 4. I and anti-hunting means comprising an energy It will thus be seen that the primary relay 15 9,198,094‘ 3 storing element connected in a loop circuit in- ‘ ing a ‘stabilizing vcomponent of current to ?ow ’ eluding said field winding and said relay winding . through said relay winding upon a change in th for introducing a component of current into said voltage applied to said ?eld winding. .c ' relay winding upon a change in the voltage ap 6.v In a regulating ‘system; a dynamo~electric plied to said field winding in a direction to stabi machine having a field winding connected in cir lize the relay winding current sooner than would cuit between the terminals thereof, said, circuit a be effected by the corrective regulating action including a regulating resistor for adjusting the alone. voltage applied to the ?eld winding, 9. regulating 5. In a regulating system, a dynamo-electric relay for intermittently short circuiting said regu- . lating resistor having an operating winding con 10 machine having a field winding connected‘ in cir cult between the terminals thereof, said circuit nected‘ between the terminals of said machine, including a regulating resistor for adjusting the a condenser, and means operative upon the short voltage applied to the field winding, a regulating circuiting of said regulating resistor for connect relay for controlling said regulating resistor and ing said condenser in series circuit with said having a winding connected in a control circuit relay winding to effect the ?ow of charging cur rent to the condenser through the winding. between said machine terminals, and energy stor ing means connected in a loop circuit for caus JOSEPH F. KGVALQKY.