Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1975-12-31
1977-10-25
Hickey, Robert J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
318138, 318139, 320 14, 320 19, H02J 700, H02P 720
Patent
active
040557898
ABSTRACT:
An energy conserving electrical apparatus for driving a load and recovering otherwise wasted electrical energy utilizes an electric motor with field windings on one or more pole members and one or more rotors. During a first time interval whose duration is determined by motor speed, electric current is supplied to the field windings from a first charged battery, the current flowing through electrical switching circuitry to the field windings of the motor to thereby turn the rotor by establishing a magnetic field, as is well known in the motor art. During a second time interval, the duration of which is also determined by motor speed, the rotor's poles confront the poles of the field winding and the switching circuitry disconnects the first battery from the field windings and connects a second discharged battery to the field windings for charging of the second battery. When the first battery is disconnected, the magnetic field established by the field windings collapses and, as a consequence of Lenz's law, a first current increment is induced in the field windings. This induced current increment, which is opposite in direction to the current which was flowing through the windings and whose stoppage produced the first current increment, is conducted through the switching circuitry to the second battery to charge the battery. Almost simultaneously with the generation of this first current increment, the magnetic field of the turning rotor links the field windings, inducing a second current increment in the coil windings. This second increment flows in the same direction as the first induced increment and is also conducted through the switching circuitry to charge the second battery. At the end of the second time interval, the electrical switching circuitry disconnects the second battery and reconnects the first battery to the field winding to again deliver current to the field winding to drive the rotor. Accordingly, the described first and second increments of current induced in the field windings between bursts of driving current are recovered by the apparatus and used to charge the second battery. A mode selection switch alternately connects the field windings to the first battery and then to the second battery at a predetermined frequency determined by the speed of the rotor's rotation and utilizes a rotating disk traveling at the same angular velocity as the rotor, the disk being provided with light transmitting apertures and by its rotation interrupting light transmission from a light source on one side of the disk to a light responsive fast switching element on the other side. Detection of light causes the switching element to shift from first to second mode causing the first battery to be disconnected and the second battery to be connected with the field winding for charging of the second battery. When no light is detected the element switches back to first mode. The invention may be used with either direct current or alternating current motors. Several embodiments of the invention are disclosed which utilize varying numbers of rotors and pole members.
REFERENCES:
patent: 3173042 (1965-03-01), Fodor
patent: 3418550 (1968-12-01), Kolatorowicz et al.
patent: 3560818 (1971-02-01), Amato
patent: 3560821 (1971-02-01), Beling
patent: 3611091 (1971-10-01), Genovese
patent: 3619746 (1971-11-01), Thornton et al.
patent: 3863084 (1975-01-01), Hasebe
Dimmer Donald J.
Hickey Robert J.
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