Electric heating – Inductive heating – With power supply system
Patent
1993-08-02
1994-09-20
Leung, Philip H.
Electric heating
Inductive heating
With power supply system
219667, 219656, H05B 608
Patent
active
053491670
ABSTRACT:
Induction heating apparatus, typically for metal melting, with multiple zone temperature control has an induction coil (10) divided into individual sections (10a, b, c) associated with respective zones and powered in parallel under regulation from controller (20) as shown in FIG. 1. To give precise and efficient automatic regulation of the zone temperatures the power supply is provided by a resonant invertor (14) as a medium frequency pulsed output and at an instantaneously selected level which is the sum of the power requirements of all the zones at any instant, and the average power applied in each zone is controlled by pulse width modulation with switching to high power for a proportion, determined by demand in that zone, of each of successive standard time periods.
REFERENCES:
patent: 3740859 (1973-06-01), Patton et al.
patent: 3823362 (1974-07-01), Bailey
patent: 4280038 (1981-07-01), Havas
patent: 4307276 (1981-12-01), Kurata et al.
patent: 4506131 (1985-03-01), Beohm et al.
patent: 4626978 (1986-12-01), Thouvenin
patent: 4845332 (1989-07-01), Jancosek et al.
patent: 5023430 (1991-06-01), Brekkestran et al.
patent: 5023705 (1991-07-01), Batcheller et al.
patent: 5059762 (1991-10-01), Simcock
Indecctotherm Europe Limited
Leung Philip H.
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