Continuously variable frequency swinging armature motor and drive

• US 7,414,374 B2
• Filed: 05/17/2007
• Issued: 08/19/2008
• Est. Priority Date: 02/28/2005
• Status: Expired due to Fees

• Current Assignee: Panint Electronic Limited
• Original Assignee: Panint Electronic Limited
• Inventors: O'Connell, Timothy E., Watts, Dan L., Vergara, David
• Primary Examiner(s): Leykin; Rita
• Application Number:
  US11/750,022
• Publication Number:
  US 20070217115A1
• Time in Patent Office: 460 Days
• Field of Search: 318/494, 318/538, 318/119, 318/122, 318/128, 318/126, 318/127, 310/13, 310/14, 310/15, 310/50, 173/18
• US Class Current: 318/119
• CPC Class Codes: B05B 9/01 Spray pistols, discharge devicesB05B9/03 takes precedence
• CPC Class Codes: B05B 9/0861 the motor being electric
• CPC Class Codes: H02P 25/032 Reciprocating, oscillating or vibrating motors

Abstract

Disclosed herein is a power device. The power device has a power source; timing circuitry powered by the power source for producing a current pulse output having a pulse width; a switch for triggering the current pulse output produced by the timing circuitry; an armature motor powered by the power source and in electrical communication with the timing circuitry for receiving the current pulse therefrom, the armature motor comprising: an electro-magnetic core; a first winding for carrying electric current to energize a magnetic field associated with the electro-magnetic core; a second winding for carrying current to reset the magnetic field associated with the electro-magnetic core, the first and second windings wound about the electro-magnetic core; and a swinging armature for providing movement in response to the energizing of the magnetic field about electro-magnetic core. The first winding and the second winding are bifilar wound together about the electro-magnetic core. When the switch triggers the current pulse from the timing circuitry, the armature operates at the current pulse output pulse width. The invention permits higher frequency operation and more output pressure/output to be generated with devices with variable speed motors.

Claims

1. A power device, comprising:

a power source;

timing circuitry powered by said power source for producing a current pulse output having a pulse width;

a switch for triggering said current pulse output from said timing circuitry; and

an armature motor powered by said power source and in electrical communication with said timing circuitry for receiving said current pulse from said timing circuitry, said armature motor comprising;

an electromagnetic core;

a first winding for carrying electrical current to energize a magnetic field associated with said electromagnetic core;

a second winding for carrying electrical current to re-set said magnetic field associated with said electromagnetic core; and

a swinging armature for providing movement in response to energizing said magnetic field associated with said electromagnetic core,

wherein when said switch triggers said current pulse from said timing circuitry, said armature operates at said current pulse output pulse width.

2. The power device of claim 1, further comprising:

at least one storage capacitor in electrical communication with said second winding,

wherein said storage capacitor stores residual electrical energy from said electromagnetic core when said magnetic field collapses.

3. The power device of claim 2, further comprising:

an electrical switching device in electrical communication with said storage capacitor, wherein when said electrical switching device is biased on, said storage capacitor releases electrical energy stored within said second winding.

4. The power device of claim 3, wherein when said electrical switching device is biased on, electrical current flows through a steering diode.

5. The power device of claim 3, wherein when said electrical switching device is biased off, said storage capacitor stores electrical energy from said second winding.

6. The power device of claim 3, wherein said electrical switching device is a MOSFET.

7. The power device of claim 1, wherein said power device is a paint sprayer.

8. The power device of claim 1, further comprising a frequency adjustment control mechanism in electrical communication with said timing circuitry for electronically varying said pulse width.

9. The power device of claim 8, wherein said frequency adjustment control mechanism is a potentiometer.

10. The power device of claim 8, wherein said frequency adjustment control mechanism permits infinite frequency adjustment within a desired operating frequency range.

11. The power device of claim 1, wherein said pulse width is about 2.8 ms.

12. The power device of claim 1, wherein said current pulse output is a continuous symmetrical output.

13. The power device of claim 1, further comprising:

an electrical steering device electrically connected to said second winding to provide an electrical path for magnetic energy to be removed from said electromagnetic core through said second winding.

14. A variable speed swinging armature motor, comprising:

an electromagnetic core;

a first winding for carrying electrical current to energize a magnetic field associated with said electromagnetic core;

a second winding for carrying electrical current to re-set said magnetic field associated with said electromagnetic core, said first winding and said second winding wound about said electromagnetic core; and

a swinging armature for providing movement in response to energizing said magnetic field associated with said electromagnetic core.

15. The variable speed swinging armature motor of claim 14, wherein removing energy from said electromagnetic core occurs before a succeeding energization cycle of said electromagnetic core.

16. The variable speed swinging armature motor of claim 14, wherein said second winding has a current carrying capacity that is less than a current carrying capacity of said first winding.

17. The variable speed swinging armature motor of claim 14, wherein said motor utilizes an AC line frequency.

18. The variable speed swinging armature motor of claim 17, wherein said AC line frequency is about 50-60 Hz.

19. The variable speed swinging armature motor of claim 14, wherein a square wave voltage is applied to said first winding and to said second winding.

20. A variable frequency driver and swinging armature motor combination, comprising:

i) a variable speed swinging armature motor, comprising;

an electromagnetic core;

a first winding for carrying electrical current to energize a magnetic field associated with said electromagnetic core;

a second winding for carrying electrical current to re-set said magnetic field associated with said electromagnetic core, said first winding and said second winding wound about said electromagnetic core; and

a swinging armature for providing movement in response to energizing said magnetic field associated with said electromagnetic core;

ii) a control circuit for controlling said variable speed swinging armature motor, comprising;

timing circuitry for producing a current pulse output having a pulse width;

a switch for triggering said current pulse output from said timing circuitry;

at least one storage capacitor in electrical communication with said second winding,

wherein said storage capacitor stores residual electrical energy from said electromagnetic core when said magnetic field collapses; and

iii) an electrical switching device in electrical communication with said storage capacitor, wherein when said electrical switching device is biased on, said storage capacitor releases electrical energy stored within said second winding.

21. The combination of claim 20, further comprising:

a frequency adjustment control mechanism in electrical communication with said timing circuitry for electronically varying said pulse width.

22. A power device, comprising:

a power source;

timing circuitry powered by said power source for producing a current pulse output having a pulse width;

a switch for triggering said current pulse output from said timing circuitry; and

an armature motor powered by said power source and in electrical communication with said timing circuitry for receiving said current pulse from said timing circuitry, said armature motor comprising;

an electromagnetic core;

a first winding for carrying electrical current to energize a magnetic field associated with said electromagnetic core;

a second winding for carrying electrical current to re-set said magnetic field associated with said electromagnetic core, said first winding and said second winding wound about said electromagnetic core; and

a swinging armature for providing movement in response to energizing said magnetic field associated with said electromagnetic core.

23. The power device of claim 22 wherein when said switch triggers said current pulse from said timing circuitry, said armature operates at said current pulse output pulse width.