Generally by and controlled thyristor
module heating works is divided into two kinds: 1.
Phase shift trigger heat conduction Angle of silicon controlled rectifier module has been adjusted so that the voltage changes, so as to adjust the heating power;
Zero passage trigger heated known as solid state relay, when heated, voltage does not change, is actually a pulse on-off signal.
Generally choose phase-shifting trigger, however, the frequency of the phase shifting trigger for grid disturbance, power performance is outstanding, but the general industrial occasions it doesn't matter, because according to the practical experience, as long as no longer heater ipsilateral using oscilloscope kind of requirement of the power system frequency, high precision instrument will not have what matter.
Phase shift and heating is a dynamic voltage reduction, so is good to extend the service life of heating element.
Zero passage trigger simple and stable, usually saves a trigger board.
Thyristor trigger signal is usually 0 - module
Or 1-5 v
5 v pulse.
Do not recommend using s7-200 high speed output control.
Common practice is to temperature control module, first the thermocouple or heat resistance temperature signal to PLC, PLC in the pid (
The procedure is not hard to)
, 4 - output
4-20 ma signal
20 ma signal sent to triggered thyristor module board, heating power thyristor module control thyristor trigger board module.
Warm prompt: zhejiang co. , LTD. , the production of silicon controlled rectifier thyristor module has 15 years experience of application of matching installation thrust plate radiator solves the chint group in actual heat dissipation problem inverter power devices, hotline: 0577 -
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