DE1663114C - Protection circuit for an AC motor with auxiliary resistance phase - Google Patents

Protection circuit for an AC motor with auxiliary resistance phase

Info

Publication number
DE1663114C
DE1663114C DE1663114C DE 1663114 C DE1663114 C DE 1663114C DE 1663114 C DE1663114 C DE 1663114C
Authority
DE
Germany
Prior art keywords
winding
starting
main
auxiliary
protection circuit
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
Other languages
German (de)
Inventor
Holger Vilhelm Lagesoe Nordborg; Enemark Arne Fromm Soenderborg; Vind (Dänemark)
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.)
Danfoss AS
Original Assignee
Danfoss AS
Publication date

Links

Description

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (1)

PatentanspiTich:Patent initiation: Schutzschaltung für einen Wechselstrommotor mit Widcrstands-Hilfsphase und einer Anlaßvorrichtung im Anlaßzweig, mit Schutzglicdern für die Haupt- und die Hilfswicklung, wobei die a\iilaßvorrichtung auch als Schutzglicd für die Hilfswicklung so ausgelegt ist, daß sie nach beendetem Anlaßvorgang oder bei blockiertem Läufer eine Überlastung der Hilfswicklung verhindert, und wobei das andere Schut/glied bei Überlastung der Hauptwieklung eine Kontakluntcrbrechung in der dem Anlaßzweig und der Hauplwicklung gemeinsamen Zuleitung herbeiführt und so mit der Anlaßvorrichlung abgestimmt ist, daß es erst nach dem Ansprechen der Anlaßvorrichtung abschaltet, gekennzeichnet durch die Gesamtheit folgender Merkmale:Protection circuit for an alternating current motor with resistance auxiliary phase and a starting device in the annealing branch, with protective glasses for the main and auxiliary windings, with the leaving device is also designed as a Schutzglicd for the auxiliary winding that it is finished after Prevents the starting process or an overload of the auxiliary winding when the rotor is blocked, and the other protection element causing a contact interruption in the event of an overload of the main load the starting branch and the main winding brings about a common supply line and so with the starting device it is coordinated that it only switches off after the starting device has responded, characterized by the entirety following features: a) Das andere Schutzglicd (7) ist ein in Wärmekontakt mit der Hauptwieklung (3) angeordneter Wickltingsthcrmostat, dessen Schaltkontakt (6) im wesentlicher nur für den maximalenHauptwicklungsslrom ausgelegt ist.a) The other Schutzglicd (7) is in thermal contact with the main weight (3) arranged winding thermostat, its switching contact (6) is designed essentially only for the maximum main winding current. b) das Anlaß- und Schutzglicd für die Hilfswicklung (2) ist ein PTC-Widerstand (5), der so bemessen ist, daß bei Abschalten des Wicklungsthermostaten infolge eines blokkierten Läufers die Temperaturen beider Wicklungen etwa gleich groß sind.b) the starting and protective device for the auxiliary winding (2) is a PTC resistor (5), which is dimensioned so that when the winding thermostat is switched off as a result of a blocked Rotor, the temperatures of both windings are about the same.

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