GB1265701A - - Google Patents
Info
- Publication number
- GB1265701A GB1265701A GB1265701DA GB1265701A GB 1265701 A GB1265701 A GB 1265701A GB 1265701D A GB1265701D A GB 1265701DA GB 1265701 A GB1265701 A GB 1265701A
- Authority
- GB
- United Kingdom
- Prior art keywords
- speed
- thyristor
- supply
- trigger
- signal
- 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
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/10—Commutator motors, e.g. repulsion motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
1,265,701. Control of A.C. motors. HOLZER PATENT A.G. 28 March, 1969 [2 April, 1968], No. 16441/69. Heading H2J. [Also in Division G3] The speed of an A.C. motor 4, supplied through a switching device 3, is regulated by adjusting the frequency at which the device 3 is operated in accordance with a voltage dependent on the speed derived from a tachogenerator 5. The tachogenerator 5 provides an A.C. signal which is rectified at 6 and compared with a desired speed signal 8 at 7. The output of the comparator 7 is used to control the frequency of an oscillator 1 whose output is amplified at 2 and used to trigger the switching device 3 which may be a symmetrical thyristor such as a Triac. By means of a synchronizing signal 9 the oscillator pulses are arranged to trigger the thyristor 3 at the zero of the A.C. supply and the pulses are of sufficient length that the thyristor stays on for one full cycle of the supply. The supply to the motor is thus in the form of complete cycles at spaced intervals, the intervals varying with the error signal to maintain constant the motor speed. The oscillator 1 may be replaced by an integrating counter which counts the half-waves of the A.C. supply at a rate determined by the time integral of the voltage 10 and issues a pulse to trigger the thyristor after a number of half-waves, the number being varied in accordance with the speed error signal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681763081 DE1763081B2 (en) | 1968-04-02 | 1968-04-02 | ARRANGEMENT FOR REGULATING THE SPEED OF AN AC MOTOR |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1265701A true GB1265701A (en) | 1972-03-08 |
Family
ID=5697360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1265701D Expired GB1265701A (en) | 1968-04-02 | 1969-03-28 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1763081B2 (en) |
| FR (1) | FR2005353A1 (en) |
| GB (1) | GB1265701A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847226B2 (en) * | 1978-03-13 | 1983-10-21 | 株式会社パイロット | liquid discharge device |
-
1968
- 1968-04-02 DE DE19681763081 patent/DE1763081B2/en active Pending
-
1969
- 1969-03-28 FR FR6909519A patent/FR2005353A1/fr not_active Withdrawn
- 1969-03-28 GB GB1265701D patent/GB1265701A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2005353A1 (en) | 1969-12-12 |
| DE1763081B2 (en) | 1971-02-25 |
| DE1763081A1 (en) | 1970-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1301033A (en) | Fluid flow regulating apparatus | |
| GB1088076A (en) | Apparatus providing a constant-rate two-component flow stream | |
| DK113222B (en) | Apparatus for generating liquid jets at such a speed that they can be used to decompose various materials. | |
| GB1310420A (en) | Apparatus including a cyclically movable member and a rate measuring system | |
| GB1266933A (en) | ||
| GB1314305A (en) | Evaporation monitoring system | |
| GB1265701A (en) | ||
| GB1187079A (en) | Improvements in Electromagnetic Clutch Control. | |
| GB1274402A (en) | Improvements in or relating to devices for measuring the duration of an electrical pulse | |
| GB1111355A (en) | Stabilised variable oscillator | |
| GB1129267A (en) | Method and apparatus for controlling the frequency of a variable frequency oscillator | |
| GB1498121A (en) | Electrical speed control systems for rotary machines | |
| GB1030808A (en) | Process and apparatus for the detection of the slope of an electric signal | |
| GB1276278A (en) | Frequency divider | |
| GB1455177A (en) | Motor speed control apparatus | |
| GB1013803A (en) | Pulse type regulating system for generators | |
| ES341755A1 (en) | Voltage control circuit for a-c generator subject to widely varying drive speeds | |
| GB1165687A (en) | Methods and apparatus for Pumping a Laser | |
| GB1122470A (en) | Improvements relating to a motor speed control circuit arrangement | |
| SU617839A1 (en) | Pulse delay system | |
| GB1193005A (en) | Speed Control Circuit for Single Phase Commutator Electric Motor | |
| GB1399920A (en) | Systems for firing grid-controlled rectifiers | |
| SU381168A1 (en) | DEVICE ADJUSTABLE DELAY | |
| DK120306B (en) | Apparatus with swivel ripple head for rippling yarn. | |
| GB1492632A (en) | Electric circuit for turbine flow meters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |