GB834952A - Alternating current generators for medium frequencies - Google Patents

Alternating current generators for medium frequencies

Info

Publication number
GB834952A
GB834952A GB3371757A GB3371757A GB834952A GB 834952 A GB834952 A GB 834952A GB 3371757 A GB3371757 A GB 3371757A GB 3371757 A GB3371757 A GB 3371757A GB 834952 A GB834952 A GB 834952A
Authority
GB
United Kingdom
Prior art keywords
frequency
generator
speed
doubler
series
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3371757A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LYNWOOD FERDINAND GARDNER
Original Assignee
LYNWOOD FERDINAND GARDNER
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LYNWOOD FERDINAND GARDNER filed Critical LYNWOOD FERDINAND GARDNER
Priority to GB3371757A priority Critical patent/GB834952A/en
Publication of GB834952A publication Critical patent/GB834952A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators

Abstract

834,952. A.C. generators; supply systems. depending on two machines. GARDNER, L. F. (Unterreiner, J., Honauer, E., and Baer, E., [trading as Unterreiner & Co., J.]). Oct. 29, 1957, No. 33717/57. Classes 35 and 38 (4). A generator unit for supplying current of variable frequency to grinding spindle motors using four frequency ranges, comprises a variable-speed alternator A having two separate star-connected stator windings which may be connected in series or parallel, and a frequency doubling asynchronous generator C mounted on the same shaft, and arranged to be connected in circuit or not, at will. The generator is driven by a motor having stepless speed variation and its field winding 17 is constantly excited through resistor 21. Ganged switches a, b, c controlled by lever 46 serve to connect the generator output windings 1, 3, 5 and 2, 4, 6 in series or parallel to produce high or low voltage, and to connect the output directly, or through the frequency-doubler, to the output terminals 39, 40, 41. The frequency doubler, which is of the same pole-number as the alternator, is arranged not to alter the voltage. The four switch positions 1-4 of lever 46 correspond to connections to four separate grinder motors operating over successive speed ranges, speed control within each range being achieved by controlling the generator speed. For the lower part of the generator speed range its stator windings are connected in series, and for the upper part in parallel so that the voltages produced are similar. In addition, the frequency-doubler may be used or not, giving the four speed ranges. The machine may be two-phase.
GB3371757A 1957-10-29 1957-10-29 Alternating current generators for medium frequencies Expired GB834952A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3371757A GB834952A (en) 1957-10-29 1957-10-29 Alternating current generators for medium frequencies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3371757A GB834952A (en) 1957-10-29 1957-10-29 Alternating current generators for medium frequencies

Publications (1)

Publication Number Publication Date
GB834952A true GB834952A (en) 1960-05-11

Family

ID=10356542

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3371757A Expired GB834952A (en) 1957-10-29 1957-10-29 Alternating current generators for medium frequencies

Country Status (1)

Country Link
GB (1) GB834952A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2737607B1 (en) * 2011-09-08 2019-09-25 Siemens Aktiengesellschaft Superconducting machine and method for the operation thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2737607B1 (en) * 2011-09-08 2019-09-25 Siemens Aktiengesellschaft Superconducting machine and method for the operation thereof

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