Bushing temperature controller
AssigneeNitto Boseki Co., Ltd.
InventorsIwao Anzai, Noboru Yamaki
Life of this patent
Estimating the term…
Abstract
A bushing temperature controller includes a transformer 3 which supplies a main current I1 to the bushing 2 for accommodating molten glass, and regulation current supply units 7 and 8 which are adapted to supply regulation currents I2 and I3 either in phase with the main current I1 or in phase inverted to the main current I1 to a portion of a region to which the transformer 3 applies the current. Thus, the temperature control of partial regions 2a and 2c in the region to which the current is applied can be performed in a wide temperature range.
Claims4
A bushing temperature controller, comprising:
- a main current supply unit which supplies a main current to a bushing for accommodating molten glass;
- and
- a regulation current supply unit comprising a transformer;
- the primary side of said transformer comprising two primary windings, wherein
- the electric power is separately supplied to each of said primary windings so that the phase of the electric current applied to one of said primary windings is opposite to that of the other;
- the regulation current supply unit further comprising two regulators,
- which regulate the electric power into said primary windings respectively;
- the regulation current supply unit further comprising a control unit,
- which outputs a control signal to said regulators;
- said regulators receiving the control signal separately;
- wherein at least two regulation current supply units are provided and each of the regulation current supply units supplies the current for regulation to a region at each end of the region to which the main current supply unit applies the current;
- and
- wherein said primary windings are connected in series.
A bushing temperature controller, comprising:
- a main current supply unit which supplies a main current to a bushing for accommodating molten glass;
- and
- a regulation current supply unit comprising a transformer;
- the primary side of said transformer comprising two primary windings, wherein
- the electric power is separately supplied to each of said primary windings so that the phase of the electric current applied to one of said primary windings is opposite to that of the other;
- the regulation current supply unit further comprising two regulators,
- which regulate the electric power into said primary windings respectively;
- the regulation current supply unit further comprising a control unit,
- which outputs a control signal to said regulators;
- said regulators receiving the control signal separately;
- wherein at least two regulation current supply units are provided and each of the regulation current supply units supplies the current for regulation to a region at each end of the region to which the main current supply unit applies the current;
- wherein said primary windings are connected in series;
- and
- wherein during operation of the bushing temperature controller, both of the two primary windings are never simultaneously supplied with power.
Dependencies are inferred from the claim text.