US1227321A - Regulator for dynamo-electric machines. - Google Patents

Description

P. ROSE. REGULATOR FOR DYNAIVIO ELECTRIC MACHINES.

APPLICATION FILED FEB. 20, Hill.

Patented May 22, 1917.

' All I YZTNESSES JZVVENPUH Fat/z, 210557,

f I v BY H's ATTUHNEY.

UNITED STATES PATENT QFFICE.

PAUL ROSE, F BERLIN, GERMANY, ASSI GNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

REGULATOR FOR DYNAMIC-ELECTRIC MACHINES.

Application filed February 20, 1911.

To all whom it may concern:

Be it known that I, PAUL Rose, a subject of the King of l russia, residing at Berlin, Germany, have invented certain new and useful Improvements in Regulators for Dynamo-Electric Machines, of which the following is a specification.

My invention relates to contact-making regulators for dynamo-electric machines.

The floating contact type of regulator commonly known as the Tirrill regulator comprises two vibrating contacts, the movements of one contact being controlled by a magnet responsive to changes of voltage,

current or other condition of the line upon which the regulator is operating and the other contact being controlled by a magnet responsive to the voltage of the exciter, or in general the field eXcita tion of the machine which the regulator is controlling. This latter magnet is commonly known as the anti-hunting magnet. These contacts move or float up and down while continuing their vibrations, the position of the lever controlled by the main regulating magnet varying in accordance with the varying load, for example, of the main generator, and the anti-hunting magnet following its movements. The construction and operation of the Tirrill type of regulator is described in Patent No. 726,234 or 1903.

The present invention comprises a further development of the vibrating type of regulator. and is distinguished from the floating contact type of regulator by the fact that the position of the vibrating contacts remains unchanged. one of the coacting contacts being stationary. The movable contact, as will be more fully explained, is controlled mechanically by both the main control magnet and the anti-hunting magnet, so that the movements of this contact are in accordance with the resultant of the pull of both these magnets.

The accompanying drawing illustrates diagrammatically my invention as applied to a voltage regulator in its simplest form operating on the field of an eXciter for an alternating current generator, but the invention is, of course, applicable to other forms of regulators.

In the drawing the alternating current generator 1 is shown as supplying the lines 2, its field 3 being fed by an exciter 4:. The Shel-1t field 5 a? the eate has a l ad Specification of Letters Patent.

Patented May 22, 1917.

Serial No. 609,545.

able rheostat 6 included in its circuit. The main control magnet 7 is connected across the lines 2, and is responsive to variations of voltage in said lines or in other words to the terminal voltage of the generator. The anti-hunting magnet 8 is connected in the usual manner across the eXciter mains, and is responsive to variations of voltage of the exciting current of the generator 1. The core 9 of the main control magnet is connected to a rod 10 which is movably attached with levers or arms 11 and 12 and thus serves as a movable fulcrum for the lever 11. The lever 12 is pivoted. at the point 13 and has attached to it a weight which serves to counterbalance the core of the magnet, The core 9 is provided with a dash pot as usual. The core 14: of the magnet 8 is attached to a lever 15 pivoted as indicator at 16 and works against a spring 17. It will be understood, of course, that the weight and spring attached respectively to the levers of the magnets illustrate but one means of counterbalancing the cores of the magnets. The lever or arm 11 rests upon knife-edge 18 on the lever or arm 15, this knife edge serving as another movable fulcrum for the lever 11. The lever 11 is provided with a contact 19 which coacts with a stationary contact 20. The closure of contacts 19 and 20 short circuits the resistance 6 in the'field circuit of the eXciter through lines 21, 22 in the usual manner, thus controlling the excitation of the generator 1.

The regulator as here illustrated will be responsive to both the voltage on the lines of the main generator and to the varying excite]? voltage in a manner similar to the floating type of Tirrill regulator. For eX- ample, if the voltage of the lines 2 tends to fall due to an increase of load the core of the magnet 7 will be lowered and with it the end of the lever 11. which is fulcrumed thereon. In this manner the closure 01" the movable contact 19 and the fixed contact 20 is prolonged against the tendency of magnet 8 to lift the left end of lever 11. The resistance 6 in the field circuit of the exciter is thereby short circuited during longer periods, the voltage of the eXciter is increased and thereby the voltage of the sys tem is restored to its normal value.

At this moment the core of magnet 7 is again in equilibrium in spite of its changed vertical position and the vibrations of the contact 19 now take place With the knifeedge in a somewhat higher position and with a greater tension of the spring 17.

In the same manner with a decreasing load and therefore with a tendency of the voltage in lines 2 to rise, the pull of magnet 7 is increased, its core rises, raising the righthand end of lever 11, the periods of closure of contacts 19, 20 are in turn decreased, inserting a resistance 6 for longer periods into the exciter field circuit, and thereby decreasing the excitation voltage. The net efiect of these vibrations as is the case with the Tirrill regulator as described in U. S. Patent No. 7 126,284 will be to maintain a voltage constant.

The advantage of the present form of construction, however, lies in the fact that the movable members of the two coacting control. magnets mechanically act upon the movable. contact in such a manner that these parts are movable independently of each other and, therefore, do not exert any disturbing effect upon each other in their ope 'ation. For these reasons, the present form of regulator enables an exceedingly accurate and sensitive regulation to be obtained.

IVhat I claim as new and desire to secure by Letters Patent of the United States, is,

1. The combination of a dynamo-electric machine, an exciter therefor, and a regulator having two coacting magnetic systems, one of which is responsive to variations in a line condition of said machine, and the other of which is responsive to variations of voltage of said exciter, a lever controlled by each of said magnetic systems, said levers mechanically engaging each other, a fixed con tact and a movable contact coacting therewith, said movable contact being governed by the resultant action of the levers.

2. An electrical regulator comprising cooperating contacts, a member actuating one of said contacts, a lever providing a fulcrum for said member, a Winding for actuating said lever and member to cause the contacts to engage and disengage, means for actuating the contact-actuating member to vary the distance between the contacts, and a winding for actuating said means.

In combination, a dynamo-electric machine, a regulator therefor comprising cooperating contacts, a member carrying one of said contacts, a lever upon which said member is fulcrumed, a winding for actuating said lever and member, means for energizing said Winding to cause the contacts to engage and disengage, another member for actuating the contact-carrying member, and a winding for actuating said latter member in response to variations of an electrical condition of the dynamo-electric machine.

4. In combination, a dynamo-electric machine and a regulator for controlling the excitation of said machine, said regulator comprising cooperating contacts, a member carrying one of said contacts, means for moving said member in response to variations of an electrical condition of said machine, and other means comprising an independently pivoted member for modifying the movement of said contact-carrying member.

5. The combination of an electric genera tor and a regulator therefor, said regulator comprising cooperating contacts arranged to control the excitation. of said generator, a member carrying one of said cont-acts, means for moving said member in response to the voltage of said generator, an independently pivoted lever serving as a fulcrum for said eontact-carrying member and thereby modifying the movement of the latter, and a winding controlling the movement of said lever.

6. In combination, a dynamo-electric ma chine and a regulator therefor, comprising cooperating contacts arranged to control the excitation of said machine, a member carrying one of said contacts, a movable fulcrum for said member, means responsive to an electrical condition of said machine controlling the movements of said fulcrum, an inde pendently pivoted lever serving as another fulcrum for said contact-carrying member, and means for controlling the movement of said lever.

7. In. combination, a dynamo-electric machine and a regulator therefor, comprising cooperating contacts arranged to control the excitation of said machine, one of said contacts being fixed, a member supporting the other contact, means pivoted to said contact-carrying member responsive to an electrical condition of said machine and arranged to control the position of the pivot point, an independently pivoted lever serving as a fulcrum for said contact-carrying member at a point remote from the first mentioned pivot point, and means for vibrating said fulcrum carrying lever.

In witness whereof, I have hereunto set my hand this 1th day of February, 1911.

PAUL ROSE. lVitnesses:

JULIUs RUMLAND KARL BIEKEBEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 01' Patents, Washington, I). G.

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