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

• US 8,106,623 B2
• Filed: 11/04/2010
• Issued: 01/31/2012
• Est. Priority Date: 06/26/2006
• Status: Active Grant

• Current Assignee: Dat D. Lam
• Original Assignee: Dat D. Lam
• Inventors: Lam, Dat D.
• Primary Examiner(s): WILLIAMS, ARUN C
• Application Number:
  US12/939,964
• Publication Number:
  US 20110187319A1
• Time in Patent Office: 453 Days
• Field of Search: 320/101
• 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 electro-magnetic power. During off-time, the electro-magnetic 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; and

said at least two windings comprising a first winding and a second winding;

b. a capacitor circuit that is coupled in series in between at least said two windings, wherein the capacitor circuit has a second associated reactance, wherein the capacitor circuit and said at least two windings 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. an AC drive circuit that is arranged to selectively charge the inductor circuit, wherein the AC drive is comprised of;

a first capacitor, wherein;

a first power line node and a second power line node is coupled to the first capacitor;

the first capacitor is coupled in parallel with the positive end of the first winding and the negative end of the second winding;

the negative end of the first winding and the positive end of the second winding are coupled in parallel with a full-wave rectifier;

the full-wave rectifier is coupled in parallel to a second capacitor that is coupled in series with a filter; and

the second capacitor is coupled in parallel to a positive terminal of the battery and a negative terminal of the battery, in combination with other elements of the claim.

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 two 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. an AC drive circuit that is arranged to selectively charge the inductor circuit, wherein the AC drive is comprised of;

a first capacitor, wherein;

a first power line node and a second power line node are coupled to the first capacitor;

the first capacitor is coupled in parallel with the negative end of the first wire of the double wire winding and negative end of the second wire of the double wire winding;

the positive end of the first wire of the double wire winding and the positive end of the second wire winding are coupled in parallel with a full-wave rectifier;

the full-wave rectifier is coupled in parallel to a second capacitor that is coupled in series with a filter; and

the second capacitor is coupled in parallel to a positive terminal of the battery and a negative terminal of the battery, in combination with the other elements of the claim.