Conservation of electrical energy and electro-magnetic power in battery charger

• US 7,852,041 B2
• Filed: 07/07/2008
• Issued: 12/14/2010
• Est. Priority Date: 06/26/2006
• Status: Expired due to Fees

• Current Assignee: Dat D. Lam
• Original Assignee: Dat D. Lam
• Inventors: Lam, Dat D.
• Primary Examiner(s): Tso; Edward
• Assistant Examiner(s): WILLIAMS, ARUN C
• Application Number:
  US12/168,865
• Publication Number:
  US 20080265843A1
• Time in Patent Office: 890 Days
• Field of Search: 320/101, 320/108, 323/238, 323/247, 323/251, 323/262, 323/328, 323/332, 323/344, 323/346, 323/901, 323/908, 363/21.04, 388/907, 388/922
• US Class Current: 320/101
• CPC Class Codes: H02K 53/00 Alleged dynamo-electric perpetua mobilia
• CPC Class Codes: H02M 7/4815 Resonant converters H02M7/4811 and H02M7/4826 take precedence
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The present disclosure is an energy-efficient rapid battery charger, using inductive windings rather than transformer to charge a battery. The apparatus operates with an AC power source rectifying a high voltage DC output or AC source transformed to a low DC voltage output. The control driver frequencies vary from several hundred Hz to thousand of Hz. A capacitor, inductor, and power line are arranged in a series parallel combination tank circuit that operates over the on and off time of a complete cycle. During on-time, the inductor is charged with electromagnetic power. During off-time, the electromagnetic power in the inductor discharges into the battery.

Claims

1. A battery charger comprising:

a. an inductor circuit that has a first associated reactance, wherein the inductor circuit is comprised of at least two windings, said at least windings comprising a first winding and a second winding, wherein the first winding is comprised of a first wire that is wound around a core from a starting position, wherein the second winding is comprised of a second wire that is wound around the core in a common direction with the first wire from the same starting position, wherein the first and second wires are further wound around the core a second time from the either the same starting position or opposite starting position to form a multi-layer arrangement, wherein the inductor circuit is arranged such that the first wire and the second wire each include a negative end and a positive end, wherein the negative end of the first wire is located adjacent to the positive end of the second wire, and wherein the positive end of the first wire is located adjacent to the negative end of the second wire;

b. a capacitor circuit that is coupled in series in between at least two windings from the inductor circuit, wherein the capacitor circuit has a second associated reactance, wherein the capacitor circuit and at least two windings from the inductor circuit are arranged in a series parallel combination circuit that operates over the on and off time of a complete cycle, wherein the apparatus is arranged that during on-time, the inductor circuit is charged with electro-magnetic power by pushing electrical energy through the first winding and pulling electric energy through the second winding, and that during off-time, the electro-magnetic power in the inductor circuit discharges into a battery and;

c. a DC drive circuit that is arranged to selectively charge the inductor circuit, wherein the DC drive circuit is comprised of at least a first and second transistor circuit, wherein;

the first transistor circuit includes a first collector that is coupled to the negative end of the second wire of the double wire winding, a first emitter that is arranged for operation from a first terminal of the power source;

the second transistor circuit includes a second collector that is coupled to the negative end of the first wire of the double wire winding, a second emitter that is coupled to a second terminal of the power source;

a first, second, and third rectifier circuit, wherein;

the first rectifier circuit is coupled between the negative end of the second wire of the double wire winding and the negative end of the first wire of the double wire winding, the second rectifier circuit is coupled between the positive end of the first wire of the double wire winding and a first capacitor, and the third rectifier circuit is coupled between the positive end of the second wire of the double wire winding and a second capacitor; and

the first and second capacitor, wherein;

the first capacitor is coupled in series to the second capacitor;

the first capacitor is coupled in series to a negative terminal of the battery; and

the second capacitor is coupled in series to a positive terminal of the battery.

2. A battery charger comprising:

a. an inductor circuit that has a first associated reactance, wherein the inductor circuit is comprised of at least two windings, said at least windings comprising a first winding and a second winding, wherein the first winding is comprised of a first wire that is wound around a core from a starting position, wherein the second winding is comprised of a second wire that is wound around the core in a common direction with the first wire from the same starting position, wherein the first and second wires are further wound around the core a second time from the either the same starting position or opposite starting position to form a multi-layer arrangement, wherein the inductor circuit is arranged such that the first wire and the second wire each include a negative end and a positive end, wherein the negative end of the first wire is located adjacent to the positive end of the second wire, and wherein the positive end of the first wire is located adjacent to the negative end of the second wire;

b. a capacitor circuit that is coupled in series in between at least two windings from the inductor circuit, wherein the capacitor circuit has a second associated reactance, wherein the capacitor circuit and at least two windings from the inductor circuit are arranged in a series parallel combination circuit that operates over the on and off time of a complete cycle, wherein the apparatus is arranged that during on-time, the inductor circuit is charged with electro-magnetic power by pushing electrical energy through the first winding and pulling electric energy through the second winding, and that during off-time, the electro-magnetic power in the inductor circuit discharges into a battery and;

c. a DC drive circuit that is arranged to selectively charge the inductor circuit, wherein the DC drive circuit is comprised of at least a first and second transistor circuit, wherein;

the first transistor circuit includes a first collector that is coupled to the negative end of the second wire of the double wire winding, a first emitter that is arranged for operation from a first terminal of the power source;

a first, second, third, and fourth rectifier circuit, wherein;

the first rectifier circuit is coupled between the negative end of the second wire of the double wire winding and the negative end of the first wire of the double wire winding, the second rectifier circuit is coupled between the positive end of the first wire of the double wire winding and a second capacitor, the third rectifier circuit is coupled between the positive end of the second wire of the double wire winding and a first capacitor, and the fourth rectifier circuit is coupled between the negative end of the first wire of the double wire winding and a second terminal of the power source; and

the first and second capacitor, wherein;

the first capacitor is coupled in series to the second capacitor;

the said capacitors are coupled in parallel to a positive terminal of the battery and a negative terminal of the battery.