DE942938C - Speed control of electric motors - Google Patents
Speed control of electric motorsInfo
- Publication number
- DE942938C DE942938C DEL5013D DEL0005013D DE942938C DE 942938 C DE942938 C DE 942938C DE L5013 D DEL5013 D DE L5013D DE L0005013 D DEL0005013 D DE L0005013D DE 942938 C DE942938 C DE 942938C
- Authority
- DE
- Germany
- Prior art keywords
- contact
- circuit
- control
- speed
- controller
- 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/063—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current using centrifugal devices, e.g. switch, resistor
Description
Es ist bekannt, zur Konstanthaltung der Drehzahl elektrischer Motoren Fliehkraftkontaktregler zu verwenden, die auf der Welle des -Motors befestigt sind. Diese Fliehkraftkontaktregler sind bei den bekannten Anordnungen derart in den Erregerkreis des Motors eingeschaltet, daß ihre Kontakte in Reihe mit der Erregerwicklung liegen. Bei derartigen Fliehkraftkontaktreglern tritt der Nachteil auf, daß die Regelbereichsgrenzen zwischen Leerlauf und Nennlast bei Änderungen der Motorspannung verschieden sind. Bei Belastung des Motors kann der Spannungswert der unteren Regelbereichsgrenze um etwa 2o'% gegenüber dem Wertbei Leerlauf steigen.It is known to keep the speed of electric motors constant To use centrifugal contact regulators, which are mounted on the shaft of the engine. These centrifugal contact regulators are in the known arrangements in such a way in the exciter circuit of the motor switched on so that their contacts are in series with the excitation winding. With such centrifugal contact regulators the disadvantage arises that the control range limits between no-load and nominal load are different when the motor voltage changes. When the motor is loaded, the voltage value of the lower control range limit increase by about 20% compared to the idle value.
Die Erfindung bezieht sich auf eine Drehzahlregelung von Elektromotoren, bei der der regelnde Kontakt des Reglers parallel zur Erregerwicklung arbeitet. Nach der Erfindung trägt der Regler einen Ruheströmkontakt und einen mit ihm in Reihe geschalteten Arbeitsstromkontakt, und der Arbeitsstromkontakt unterbricht in Ruhe den Regelstromkreis, so daß dann der Strom durch die Erregerwicklung fließen kann, während der Arbeitsstromkontakt beim Hochlaufen der Maschine kurz vor dem Erreichen der Regelnenndrehzahl schließt, und beim Erreichen der Nenndrehzahl wird. der Ruhestromkontakt geöffnet und der Regelvorgang eingeleitet. Bei einer derartigen Drehzahlregelung wird durch einen im Stromkreis des Reglers liegenden Widerstand die Größe des Regelbereiches eingestellt. Ferner wird die Lage des Regelbereiches durch einen im Erregerstromkreis liegenden Widerstand eingestellt.The invention relates to a speed control of electric motors, in which the regulating contact of the controller works parallel to the excitation winding. According to the invention, the regulator carries a closed-circuit contact and one with it Series-connected operating current contact, and the operating current contact is interrupted the control circuit at rest, so that the current then flows through the excitation winding can, while the working current contact when starting the machine shortly before the Reaching the nominal control speed closes, and when the nominal speed is reached,. the closed-circuit contact is opened and the control process is initiated. With such a Speed control is achieved by a resistor in the controller's circuit set the size of the control range. Furthermore, the position of the control area set by a resistor in the excitation circuit.
Die Erfindung hat gegenüber bekannten Regelanordnungen, bei denen der regelnde Kontakt des Reglers über einen Widerstand parallel zur Erregerwicklung arbeitet, den Vorteil, daß der regelnde Kontakt bei Stillstand des Motors nicht wirksam ist, daß der Motor beim Anlauf sein höchstes Moment entwickeln kann und daß der regelnde Kontakt erst nach dem Hochlaufen durch das Kombinationskontaktpaar zum Regeln freigegeben wird.The invention has over known control arrangements in which the regulating contact of the controller via a resistor parallel to the excitation winding works, the advantage that the regulating contact does not work when the motor is at a standstill What is effective is that the motor can develop its maximum torque when starting and that the regulating contact only occurs after the combination contact pair has run up is released to regulate.
Die Abbildung zeigt ein Ausführungsbeispiel der erfindungsgemäßen Anordnung. Parallel zur Erregerwicklung i des Motors 2 ist der Fliehkraftkontaktregler 3 angeordnet. Dieser Fliehkraftkontaktregler besitzt den Arbeitsstromkontakt ¢ und in Reihe mit diesem den Ruhestromkontakt 5. Der Kontakt 4 unterbricht in Ruhe den Regelkontaktkreis, so daß dann der gesamte Strom über die Erregerwicklung i fließen kann. Erst kurz vor dem Erreichen der Regelnenndrehzahl wird dieser Kontakt 4 geschlossen und bei Erreichen der Nenndrehzahl der Kontakt 5 geöffnet und somit der Regelvorgang eingeleitet. Der Widerstand 6 ist maßgebend für die Einstellung der Größe des Regelbereiches (etwa io Volt). Es ist nicht unbedingt erforderlich, daß dieser Widerstand mit auf dem Regler rotiert, sondern er kann auch außerhalb des Reglers in den Stromkreis eingeschaltet sein. Durch den Widerstand 7 erfolgt vorwiegend eine Einstellung der Lage des Bereiches, in dem der Regler arbeitet, also von 3o bis 40 Volt oder 35 bis 45 Volt usw.The figure shows an embodiment of the invention Arrangement. The centrifugal contact regulator is parallel to the excitation winding i of the motor 2 3 arranged. This centrifugal contact regulator has the operating current contact ¢ and in series with this the closed-circuit contact 5. The contact 4 interrupts the rest Control contact circuit, so that the entire current then flows through the field winding i can. This contact 4 is only closed shortly before the nominal control speed is reached and when the nominal speed is reached, contact 5 is opened and thus the control process initiated. The resistance 6 is decisive for setting the size of the control range (about 10 volts). It is not absolutely necessary to have this resistor on the controller rotates, but he can also outside of the controller in the circuit to be on. The resistor 7 is mainly used to adjust the Location of the range in which the controller works, i.e. from 3o to 40 volts or 35 up to 45 volts etc.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL5013D DE942938C (en) | 1944-09-17 | 1944-09-17 | Speed control of electric motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL5013D DE942938C (en) | 1944-09-17 | 1944-09-17 | Speed control of electric motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE942938C true DE942938C (en) | 1956-05-09 |
Family
ID=7256687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEL5013D Expired DE942938C (en) | 1944-09-17 | 1944-09-17 | Speed control of electric motors |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE942938C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1183581B (en) * | 1962-03-24 | 1964-12-17 | Buchungsmaschinenwerk Veb | Device for the automatic control of the speed of an electric motor |
| US7703363B2 (en) | 2001-08-27 | 2010-04-27 | Flow International Corporation | Apparatus for generating and manipulating a high-pressure fluid jet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE414022C (en) * | 1925-05-20 | Joseph Bethenod | Centrifugal governor for electric motors | |
| DE417028C (en) * | 1923-12-05 | 1925-08-03 | Telefunken Gmbh | Tour regulator for electric motors |
| DE502564C (en) * | 1927-10-01 | 1930-07-19 | Carl Schenck G M B H | Centrifugal contact regulator with leaf spring |
-
1944
- 1944-09-17 DE DEL5013D patent/DE942938C/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE414022C (en) * | 1925-05-20 | Joseph Bethenod | Centrifugal governor for electric motors | |
| DE417028C (en) * | 1923-12-05 | 1925-08-03 | Telefunken Gmbh | Tour regulator for electric motors |
| DE502564C (en) * | 1927-10-01 | 1930-07-19 | Carl Schenck G M B H | Centrifugal contact regulator with leaf spring |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1183581B (en) * | 1962-03-24 | 1964-12-17 | Buchungsmaschinenwerk Veb | Device for the automatic control of the speed of an electric motor |
| US7703363B2 (en) | 2001-08-27 | 2010-04-27 | Flow International Corporation | Apparatus for generating and manipulating a high-pressure fluid jet |
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