Abstract A discharge load driving circuit has a transformer with a low voltage coil and a high voltage coil wound around a magnetic core. The high voltage coil has a transformation ratio for setting a high self-resonance frequency value for the transformer to thereby output high voltage at a short rise time period. The discharge load driving circuit further includes a switching element connected to the transformer for switching on and off a d-c input supplied thereto through the low voltage coil of the transformer. The discharge load driving circuit further includes a driver circuit for driving a switching element driving pulse, a control circuit for controlling the driver circuit, a discharge load connected to the high voltage coil for discharging load by a high voltage output generated in the high voltage coil when the switching element is turned on, and a detector for detecting a flow of discharge current in the discharge load. The switching element repeats its on-off action in a predetermined. For supplying a required amount of discharge energy to the discharged load until self-propagation of a flame subsequent to generation of a flame nucleus by a spark discharge of the discharge load.
A discharge load driving circuit, comprising: a transformer having a low voltage coil and a high voltage coil wound around a magnetic core, said high voltage coil having a transformation ratio for setting a high self-resonance frequency value for said transformer to thereby output high voltage at a short rise time; a switching element operably connected to said transformer for switching on and off a d-c input supplied thereto through the low voltage coil of said transformer; a driver circuit for driving a switching element driving pulse; a control circuit for controlling said driver circuit; a discharge load connected to said high voltage coil for discharging load by a high voltage output generated in said high voltage coil when said switching element is turned on; and a detector for detecting a flow of discharge current in said discharge load; said switching element repeates its on-off action in a predetermined period for supplying a required amount of discharge energy to said discharge load until self-propagation of a flame subsequent to generation of a flame nucleus by a spark discharge of said discharge load.
Claim 2
Dependent Claim
182 words
A discharge load driving circuit, comprising: a transformer having a low voltage coil and a high voltage coil wound around a magnetic core, said high voltage coil having a transformation ratio for setting a high self-resonance frequency value for said transformer to thereby output high voltage at a short rise time; a switching element operably connected to said transformer for switching on and off a d-c input supplied thereto through the low voltage coil of said transformer; a driver circuit for driving a switching element driving pulse; a control circuit for controlling said driver circuit; a discharge load connected to said high voltage coil for discharging load by a high voltage output generated in said high voltage coil when said switching element is turned on; and a detector for detecting a flow of discharge current in said discharge load; said switching element repeates its on-off action in a predetermined period for supplying a required amount of discharge energy to said discharge load until self-propagation of a flame subsequent to generation of a flame nucleus by a spark discharge of said discharge load.
Claim 3
Dependent Claim
59 words
The discharge load driving circuit according to claim 1, wherein said magnetic core is comprised of a selected material having an initial permeability of at least 1500 at a frequency of 200 kHz, and a saturation magnetic flux density of at least 300 mT in a field intensity of substantially 1600 A/m at a temperature of substantially 120° C.
Claim 4
Dependent Claim
19 words
The discharge load driving circuit according to claim 1, wherein said switching element comprises an electric field effect transistor.
Claim 5
Dependent Claim
24 words
The discharge load driving circuit according to claim 1, wherein the period of on-off repetition is less than 500 μs for said switching element.
Claim 6
Dependent Claim
23 words
The discharge load driving circuit according to claim 1, wherein the ON-period per discharge is less than 50 μs for said switching element.