GB771098A - Improvements in or relating to circuits for alternating current commutator motors - Google Patents
Improvements in or relating to circuits for alternating current commutator motorsInfo
- Publication number
- GB771098A GB771098A GB24380/55A GB2438055A GB771098A GB 771098 A GB771098 A GB 771098A GB 24380/55 A GB24380/55 A GB 24380/55A GB 2438055 A GB2438055 A GB 2438055A GB 771098 A GB771098 A GB 771098A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- transformer
- armature
- braking
- arm
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
- H02P25/182—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays whereby the speed is regulated by using centrifucal devices, e.g. switch, resistor
Abstract
771,098. Control of A.C. motors. SANDOZ, Ltd. Aug. 24, 1955 [Sept. 6, 1954], No. 24380/55. Class 38(3) A centrifuge is driven by an A.C. commutator motor having armature M and series field windings W1, W2, the motor being controlled by means of a manually - operated auto transformer R the adjusting arm of which is mechanically gauged with changeover switches U1, U2. The motor is started by setting the arm of the transformer in the range F, the motor continuing to operate until a time switch T opens at the end of a predetermined period so that the motor may be allowed to coast to a standstill. If, however, the transformer arm is moved beyond the zero position into the braking range B, the armature of the motor is reversed in relation to its field windings, the braking current being smoothly increased by further adjustment of the transformer in the same sense. The braking circuit is opened at a low predetermined speed by means of a centrifugal switch Z. In another arrangement, Fig. 2 (not shown), braking operation is provided by reversing the field winding W2 with respect to the armature M and field winding W1. An overload safety switch S is provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH771098X | 1954-09-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB771098A true GB771098A (en) | 1957-03-27 |
Family
ID=4535393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24380/55A Expired GB771098A (en) | 1954-09-06 | 1955-08-24 | Improvements in or relating to circuits for alternating current commutator motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB771098A (en) |
-
1955
- 1955-08-24 GB GB24380/55A patent/GB771098A/en not_active Expired
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