Divided phase ac synchronous motor controller

Abstract

A method for a circuit for a motor comprising first and second phase windings. The method comprises receiving AC power from the first and second phase windings at a DC power supply and converting the AC power to DC power and receiving AC power from the first and second phase windings by at least one power switch between the first and second phase windings and switching the AC power by the at least one power switch. The method includes preventing the DC power supply from collapsing, by a first component connected to the DC power supply, when the at least one power switch is on during a first portion of an AC cycle and preventing the DC power supply from collapsing, by a second component connected to the DC power supply, when the at least one power switch is on during a second portion of the AC cycle.

What is claimed is: 
     
         1 . A circuit for a motor comprising:
 first and second phase primary windings;   a power switch connected between the first and second phase primary windings;   a first and second secondary coils in electrical communication with the first and second phase primary windings;   a direct current (DC) power supply in electrical communication with the first and second secondary coils to convert alternating current (AC) power from the first and second secondary coils to DC power; and   a motor controller receiving DC power from the DC power supply to control the power switch;   wherein the first secondary coil prevents the DC power supply from collapsing when the at power switch is on during a first portion of a cycle and the second secondary coil prevents the DC power supply from collapsing when the power switch is on during a second portion of a cycle.   
     
     
         2 . The circuit of  claim 1  wherein the first and second phase primary windings are divided at least approximately in half and receive an AC power signal. 
     
     
         3 . The circuit of  claim 1  wherein the first and second secondary coils filter high frequency noise from the AC power provided to the DC power supply. 
     
     
         4 . The circuit of  claim 1  wherein the first and second secondary coils are divided at least approximately in half between the first and second phase primary windings. 
     
     
         5 . The circuit of  claim 4  wherein the first secondary coil and the first phase primary winding have a 20:1 winding ratio. 
     
     
         6 . The circuit of  claim 1  wherein the first and second secondary coils are unevenly between the first and second phase primary windings. 
     
     
         7 . The circuit of  claim 1  further comprising:
 a voltage regulator device connected in parallel to the power switch. 
 
     
     
         8 . The circuit of  claim 7  wherein the voltage regulator device is a Zener diode. 
     
     
         9 . The circuit of  claim 1  wherein the power switch comprises a bridge rectifier circuit and a transistor power switch. 
     
     
         10 . The circuit of  claim 9  wherein the bridge rectifier circuit is a full-wave bridge rectifier and the transistor power switch is a MOSFET-type transistor. 
     
     
         11 . The circuit of  claim 9  wherein the bridge rectifier circuit prevents negative voltage from the first and second phase primary windings from being supplied to the transistor power switch. 
     
     
         12 . The circuit of  claim 1  wherein the motor controller comprises Hall effect switch to determine a position of a rotor of the motor. 
     
     
         13 . A method for a circuit comprising:
 providing first and second motor phase primary windings;   providing a power switch connected between the first and second motor phase primary windings;   providing a first and second secondary coils in electrical communication with the first and second motor phase primary windings;   providing a direct current (DC) power supply in electrical communication with the first and second secondary coils to convert alternating current (AC) power from the first and second secondary coils to DC power; and   providing a motor controller receiving DC power from the DC power supply to control the power switch;   wherein the first secondary coil prevents the DC power supply from collapsing when the power switch is on during a first portion of a cycle and the second secondary coil prevents the DC power supply from collapsing when the power switch is on during a second portion of a cycle.   
     
     
         14 . The method of  claim 13  wherein the first and second phase primary windings are divided at least approximately in half and receive an AC power signal. 
     
     
         15 . The method of  claim 13  wherein the first and second secondary coils filter high frequency noise from the AC power provided to the DC power supply. 
     
     
         16 . The method of  claim 13  wherein the first and second secondary coils are divided at least approximately in half between the first and second phase primary windings. 
     
     
         17 . The method of  claim 13  wherein the first and second secondary coils are unevenly between the first and second phase primary windings. 
     
     
         18 . The method of  claim 13  further comprising:
 a voltage regulator device connected in parallel to the power switch. 
 
     
     
         19 . The method of  claim 18  wherein the voltage regulator device is a Zener diode. 
     
     
         20 . The method of  claim 13  wherein the power switch comprises a bridge rectifier circuit and a transistor power switch. 
     
     
         21 . The method of  claim 20  wherein the bridge rectifier circuit is a full-wave bridge rectifier and the transistor power switch is a MOSFET-type transistor. 
     
     
         22 . The method of  claim 20  wherein the bridge rectifier circuit prevents negative voltage from the first and second phase primary windings from being supplied to the transistor power switch.