Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Including means for using – or compensating for – the induced...
Patent
1989-02-13
1990-11-27
Jaworski, Francis
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Including means for using, or compensating for, the induced...
600 9, A61N 100
Patent
active
049741144
ABSTRACT:
An energy recovery system for an electrotherapy device, particularly for bone healing, which permits the device to be small, light and portable, and to have extended battery life. Included are a drive voltage source and a ground reference potential. Driving transistors are between an inductive load and, relatively, the voltage source and ground potential, with a storage capacitor connected between the latter two. The voltage source is commonly a battery, preferably a zinc-air battery. Induction load power is applied when both transistors turn on simultaneously. For energy recovery, diodes are connected between the first terminal of the inductive load and the ground potential and between the second terminal of the inductive load and the high voltage source, such that they are reversed biased when the drive transistors are conducting. When drive power is removed from the inductive load by switching off the drive transistors, a reverse EMF is established in the inductive load. As the inductive load magnetic field collapses, a reverse voltage is developed across the inductor higher than the applied voltage by an amount sufficient to forward bias the diodes. Thus, current flows from the inductive load through the diodes to the storage capacitor. Recovery of the energy stored in the inductor continues until the energy remaining is insufficient to maintain current flow to the storage capacitor.
REFERENCES:
patent: 3717153 (1973-02-01), Bowers
patent: 3893462 (1985-07-01), Manning
patent: 4266532 (1981-05-01), Ryaby et al.
patent: 4574809 (1986-03-01), Talish et al.
patent: 4654574 (1987-03-01), Thaler
patent: 4665920 (1987-05-01), Campbell
Bedford et al., Principles of Inverter Circuits, pp. 48-54, 184-195, (John Riley, NY: 1964).
Dixon, "The Effects of Leakage Inductance on Switching Power Performance", p. 2-1, Unitrode Corporation, Massachusetts, 1983.
Haver, "A Designer's Guide to Switching Power Supplies (Part 1)", Power Conversion Int'l., pp. 47-48, (Jul. /Aug. 1981).
Lilienstein, "A New Overbiased Transformer Converter Combines Current-Source and Mag Amp Control Characteristics", Proc. 10th Natl., solid-State Power Conversion Conf. (POWERCON 10), vol. B-3, p. 2, 1983.
McMurray et al., "A Silicon-Controlled Rectifier Inverter with Improved Commutation", AIEE Trans., vol. 80, Part 1, pp. 531-542, (Nov., 1961).
Spadaro, "Bioelectric Stimulation of Bone Formation: Methods, Models and Mechanisms", J. Bioelectricity, vol. 1, No. 1, pp. 99-128 (1982).
Jaworski Francis
LTI Biomedical, Inc.
Manuel George
LandOfFree
Energy recovery circuit for electrotherapy device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Energy recovery circuit for electrotherapy device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energy recovery circuit for electrotherapy device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1036367