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The maximum Surface Temperature is 1450°C which cannot be exceeded. Use beyond 1400°C surface temperature is life-limiting. A pyrometer in a free radiating condition or a thermocouple in an enclosed condition is recommended for use if operating above 1200°C to prevent inadvertent burn-out. The use of MHI controls is highly recommended.
Simple power and voltage calculator for the patented MagnaCoil™ is given below. Note that free radiating and enclosed heating objectives have different power demands.
The Power of a MagnaCoil™ depends on the Diameter Di and N and the number of turns. Note that N is not an integer for IMC or some MC models.
Maximum Power = (50-25) N P Di Watts (Di in inches). The range depends on the enclosure used. The highest Power for unenclosed (free radiating) is the objective in a free radiating condition. Providing a section changes the aim to temperature instead of Power. As the temperature is achieved, the power demand equals loss of Power from the enclosure and P =3.1-3.2. See also the radiation page.
Maximum Voltage V= N P Di/(2-3) Volts, Di in inches. The range depends on the enclosure used.
Maximum MagnaCoil Surface temperature is 1450°C. Use beyond 1400°C is life-limiting
Free radiating Power is the Power dissipated by the coil when there is no surrounding refractory enclosure.
Vertical configurations and stress may reduce the use temperature.
CHS-OD or equivalent spacers are recommended when creep deformation is possible.
Note that coil temperature and environment temperatures will be different.
A feedback controller is highly recommended for managing the coil temperature. For small coils
a BPAN controller is recommended.
Coil temperature is best measured with a pyrometer with feedback control BPAN.
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