Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1998-12-31
2000-06-27
Berhane, Adolf Deneke
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363131, 310 64, H02M 744, H02K 132
Patent
active
060814381
ABSTRACT:
A series-resonant power converter (10) comprising a transformer (100), a resonant tank circuit (120) having a piezo-electric crystal (122) as the resonant element and a series-connected resonant capacitor (124). First and second switches (132 and 134) are connected to the transformer (100) and are driven by voltages at windings of the transformer so as to alternately turn on. The piezo-electric crystal (122) self-oscillates to store and release energy and thereby charge and discharge the capacitor (124). Moreover, as a result of the self-oscillation of the resonant circuit (120), the switches (132 and 134) are alternately driven in synchronism with the charging and discharging cycle of the capacitor (122) through windings of the transformer (100). No additional switching circuitry is needed to achieve proper oscillation of the resonant tank circuit (120).
REFERENCES:
patent: 4179671 (1979-12-01), Yoshida et al.
patent: 5864472 (1999-01-01), Peterson
Patil Ashok R.
Saint-Pierre Roland Sylvere
Berhane Adolf Deneke
Burrus Philip
Farley Felipe
Motorola Inc.
Patel Rajnikant B.
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