Contact thermometer operated heater control circuit - has supply controlled by relay and triac connected to thermometer and optical coupler

The control circuit for a heater (19) which is switched by a control signal from a contact thermometer, includes a switching signal amplifier (18) followed by a switching amplifier (20) and a load switch formed by a triac (16). The triac is connected across the a.c. supply (12) which has a switching...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	GRUNDIG,PETER
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS BASIC ELECTRONIC CIRCUITRY CONTROLLING CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS EMERGENCY PROTECTIVE DEVICES GENERATION PHYSICS PULSE TECHNIQUE REGULATING RELAYS SELECTORS SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The control circuit for a heater (19) which is switched by a control signal from a contact thermometer, includes a switching signal amplifier (18) followed by a switching amplifier (20) and a load switch formed by a triac (16). The triac is connected across the a.c. supply (12) which has a switching contact (34,36) in each line, operated by a relay (38). The supply voltage for the relay is either the control voltage or the voltage for the triac. The output from the switching signal amplifier passes through a resistance (22) and an optical coupler (28) with a load resistance (32) in the supply line. Between the coupler and the first resistance (32) is a capacitor. The relay is connected by an amplifier (44) to the junction point of the capacitor.