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US 4,920,448 AGranted
Semiconductor-assisted ultra-fast contact breaker
AssigneeAcec Transport S.A.
InventorHenri Bonhomme
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AssigneeAcec Transport S.A.
InventorHenri Bonhomme
Estimating the term…
An ultra-fast contact breaker is described which includes an ultra-fast cut-off mechanism provided with a repulsion disk fitted with moving contacts (7, 7'), the said mechanism also including fixed contacts (9, 9'), to the input and output terminals (1, 3) of which there is connected an assistance circuit (10) including a capacitor (21) and a coil (23) as well as a group of semiconductors (13, 15, 17, 19), the coil (23) wholly or partly constituting the repulsion coil of the said ultra-fast mechanism, which includes at least two parallel branches (CD, EF), a first branch (CD) including two opposed diodes (13, 15) or similar in series, each directed in the non-conducting direction for the current entering the circuit, a second branch (EF) including two opposed thyristors or similar (17, 19), each directed in the conducting direction for the current entering the circuit, and the LC oscillating circuit (21, 23) which connects the common point of the two diodes (13, 15) or similar and the common point of the two thyristors (17, 19 ) or similar, the two thyristors (17, 19) or similar being remote controlled or controlled by a current sensor (20) which is built in and which detects the exceeding of a previously fixed triggering threshold which can be adjusted in the control electronics.
An ultra-fast contact breaker including an ultra-fast cut-off mechanism provided with a repulsion disk fitted with moving contacts, the said mechanism also including fixed contacts, to input and output terminals of which there is connected an assistance circuit including a capacitor and a coil as well as a group of semiconductors, the coil wholly or partly constituting a repulsion coil of said ultra-fast mechanism, the assistance circuit having at least two parallel branches, a first of said branches including two opposed diodes or similar in series, each directed in a non-conducting direction for current entering the circuit, a second of said branches including two opposed thyristors or similar, each directed in a conducting direction for current entering the circuit, and an LC oscillating circuit formed by said capacitor and said coil which connects a common point of the two diodes or similar and a common point of the two thyristors or similar, the two thyristors or similar being remote controlled or controlled via a current sensor which is built in and which detects the exceeding of a previously fixed triggering threshold which can be adjusted in control electronics.
An ultra-fast contact breaker including an ultra-fast cut-off mechanism provided with a repulsion disk fitted with moving contacts, said mechanism also including fixed contacts, to input and output terminals of which there is connected an assistance circuit including a capacitor and a coil as well as a group of semiconductors, the coil wholly or partly constituting a repulsion coil of said ultra-fast mechanism, the assistance circuit having at least two parallel branches, a first of said branches including a first set of two opposed diodes or similar in series, each directed in a non-conducting direction for current entering the circuit, a second of said branches including a second set of two opposed diodes and a thyristor connected between said diodes to an LC oscillating circuit formed by said capacitor and said coil which connects a common point of the first two diodes in the first branch and a common point of the second two diodes in the second branch through said thyristor, said thyristor being remote controlled or controlled via a current sensor which is built in and which detects the exceeding of a previously fixed triggering threshold which can be adjusted in control electronics.
Dependencies are inferred from the claim text.