Method for open-loop/closed-loop control of at least two paralle

Details Method for open-loop/closed-loop control of at least two paralle Method for open-loop/closed-loop control of at least two paralle

1994-06-01

1996-04-16

Leung, Philip H.

Electric heating

Inductive heating

With power supply system

219666, 219662, 363 71, 373148, H05B 608

Patent

active

055084974

ABSTRACT:
In a method for open-loop/closed-loop control of current converter valves of at least two load-guided parallel oscillating circuit inverters being supplied from a common direct current or direct voltage source and being connected in series on the DC side, each inverter has one induction furnace with a compensating conductor. Two diagonally opposed current converter valves are ignited at a time in one inverter to establish a flow of current from the source with a series-connected choke through the parallel oscillating circuit connected to that inverter. Load phase angles of the parallel oscillating circuit inverters are adjusted, resulting in arbitrarily specified individual powers of the parallel oscillating circuits wherein a maximum power that can be output by the source is taken into account, and attaining a specified ratio between the individual powers of the parallel oscillating circuits. An intervention is made into the open-loop/closed-loop control of the source only after one of the load phase angles to be established reaches a minimum value being dictating in particular by valve hold-off intervals, for reducing the direct current or direct voltage, while operating the source in fully driven fashion at load phase angles to be established above the minimum value.

REFERENCES:
patent: 4280038 (1981-07-01), Havas et al.
patent: 4289946 (1981-09-01), Yarwood et al.
patent: 4507722 (1985-03-01), Dewan et al.
patent: 4556937 (1985-12-01), Ziogas et al.
patent: 5266765 (1993-11-01), Storm et al.
EPE Publ. Oct. 1989, pp. 353-360 "A New Sequential-Switching Voltage-Clamped High-Frequency Resonant . . . ".

Affiliated with

Also associated with

Rating

Method for open-loop/closed-loop control of at least two paralle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for open-loop/closed-loop control of at least two paralle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for open-loop/closed-loop control of at least two paralle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-326850