THREE-WIRE REVERSING SYSTEM

• US 20050122075A1
• Filed: 12/08/2003
• Published: 06/09/2005
• Est. Priority Date: 12/08/2003
• Status: Active Grant

• Current Assignee: Molon Motor and Coil Corporation
• Original Assignee: Molon Motor and Coil Corporation
• Inventors: Tsergas, Athanase N., Ramirez, Emilio A. Jr.
• Granted Patent: US 6,924,612 B2
• Time in Patent Office: Days
• US Class Current: 318/280
• CPC Class Codes: H02P 7/05 by means of electronic switching

Abstract

A three-wire reversing system for a permanent magnet, reversible, brush-type, direct current (DC) motor has a three-wire alternating current (AC) input voltage source which supplies electrical current to at least one capacitive element. This capacitive element and the DC motor replace a permanent split capacitor (PSC) and an AC motor in a prior art three-wire reversing system.

Claims

1. A three-wire reversing system comprising:

a capacitive element;

a permanent magnet, reversible, brush-type, direct current motor electrically connected to the capacitive element, said motor having first and second terminals;

a first diode having an anode connected to a first switch lead for clockwise rotation of the motor, said first diode being connected to the first terminal of the motor;

a second diode having a cathode connected to a second switch lead for counterclockwise rotation of the motor, said second diode being connected to the first terminal of the motor;

a common lead connected to the second terminal of the motor; and

an alternating current input voltage source electrically connected to the common lead and selectively connected to one of the first switch lead and the second switch lead.

2. A three-wire reversing system, according to claim 1, wherein the capacitive element is a nonpolar, aluminum, electrolytic type of capacitor.

3. A three-wire reversing system, according to claim 1, wherein the capacitive element includes two polarized electrolytic capacitors connected to one another in series at a common negative terminal.

4. A three-wire reversing system, according to claim 1, wherein the capacitive element is connected in parallel across the first and second terminals of the motor.