Electric heating – Metal heating – For bonding with pressure
Patent
1993-03-05
1994-03-15
Shaw, Clifford C.
Electric heating
Metal heating
For bonding with pressure
B23K 1126
Patent
active
052947688
ABSTRACT:
The circuit has a transformer on whose primary side there is a storage capacitor which can be charged and discharged in a controlled manner and to whose secondary circuit a load is connected. Two ancillary capacitors of the same capacitance are connected in a circuit between the storage capacitor and the transformer, and the storage capacitor's capacitance is a multiple of the capacitance of each ancillary capacitor. Each ancillary capacitor is connected via a charge-control element to the storage capacitor and via a discharge-control element to the transformer, and forms a parallel resonant circuit with the inductance of its discharge circuit. Control means are connected to the charge- and discharge-control elements in order to alternately and cyclically charge and discharge the ancillary capacitors in a controlled manner. By these means, sequences of partial pulses are generated which, for each sequence, collectively form a current pulse. The cycle frequency of the partial pulses determined by the control means is equal to the natural frequency of said resonant circuits. The circuit can generate either direct-current pulses or, in another embodiment, alternating-current pulses.
REFERENCES:
patent: 3895211 (1975-07-01), Pentegov et al.
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