1
Wally E Rippel: Unity power factor switching regulator. California Institute of Technology, Freilich Hornbaker Wasserman Rosen & Fernandez, May 17, 1983: US04384321 (138 worldwide citation)

A single or multiphase boost chopper regulator operating with unity power factor, for use such as to charge a battery is comprised of a power section for converting single or multiphase line energy into recharge energy including a rectifier (10), one inductor (L.sub.1) and one chopper (Q.sub.1) for ...


2
Wally E Rippel: Integrable current sensors. California Institute of Technology, Antonio M Fernandez, August 20, 1991: US05041780 (123 worldwide citation)

A current conductor is provided with opposing notches to produce a restricted section and with magnetic flux sensors on opposite sides of the restricted current section. The flux sensors are connected to differential amplification circuitry. The restricted section increases the concentration of magn ...


3
William D Buchanan, Joseph F Mohos, Wally E Rippel: Battery charging system and method. Aerovironment, Law Office of John A Griecci, August 14, 2007: US07256516 (90 worldwide citation)

A charging system for simultaneously charging the batteries of a plurality of battery powered vehicles. The charging includes one or more DC-DC power converters having one or more charging ports configured to plug into the batteries. The DC-DC power converters are each configured to selectively conn ...


4
Wally E Rippel, Alan G Cocconi: Integrated motor drive and recharge system. General Motors, Pretty Schroeder Brueggemann & Clark, March 24, 1992: US05099186 (81 worldwide citation)

A drive and recharge system is disclosed that includes a bidirectional dc power source, two voltage-fed inverters, two induction motors, and a control unit. In the drive mode, power is bidirectionally connected between the dc power source and the motors. In the recharge mode, single-phase power appl ...


5
Wally E Rippel: Integrated traction inverter and battery charger apparatus. California Institute of Technology, Marvin E Jacobs, April 24, 1990: US04920475 (59 worldwide citation)

An integrated traction inverter and battery charger apparatus which is capable of operating in either drive or charge modes. The apparatus integrates the components of a prior art three-phase inverter with an AC line-powered prior art DC source charger in a manner which recognizes that an input capa ...


6
Wally E Rippel, Dean B Edwards: Bipolar battery construction. California Institute of Technology, Poms Smith Lande & Rose, June 23, 1981: US04275130 (59 worldwide citation)

A lightweight, bipolar battery construction for lead acid batteries in which a plurality of thin, rigid, biplates each comprise a graphite fiber thermoplastic composition in conductive relation to lead stripes plated on opposite flat surfaces of the plates, and wherein a plurality of nonconductive t ...


7
Wally E Rippel: Forced air heat sink apparatus. California Institute of Technology, Leonard Tachner, December 5, 1989: US04884631 (42 worldwide citation)

A high efficiency forced air heat sink assembly employs a split feed transverse flow configuration to minimize the length of the air flow path through at least two separated fin structures. Different embodiments use different fin structure material configurations including honeycomb, corrugated and ...


8
Joel B Wacknov, Wally E Rippel: Dc/ac inverter apparatus for three-phase and single-phase motors. AeroVironment, James R Brueggemann, Sheppard Mullin Richter & Hampton, May 15, 2001: US06232742 (34 worldwide citation)

Electrical power apparatus is disclosed for selectively powering either a three-phase ac motor or a single-phase ac motor. A dc/ac inverter is configured to provide appropriately phased input signals to the three input terminals of whichever motor is being driven, with no substantial hardware reconf ...


9
Wally E Rippel, Dean B Edwards: Quasi-bipolar battery construction and method of fabricating. California Institute of Technology, Marvin E Jacobs, October 12, 1982: US04353969 (33 worldwide citation)

A lightweight, battery construction for lead acid batteries in which biplates are formed from a continuous strip of thermoplastic material, one face of the strip being provided with a plurality of electrically isolated lead strip arrays, each having a transverse axis about which the strip is folded ...


10
Wally E Rippel, Darrell Buchanan: Bidirectional load and source cycler. AeroVironment, Burns Doane Swecker & Mathis, May 12, 1998: US05751150 (29 worldwide citation)

A system and method for cycling loads and sources can be connected to one or more loads and sources to controllably supply or absorb current with respect thereto. For example, DC voltages can be controllably supplied to each load from a DC bus using a plurality of DC-DC converters. Various DC conver ...