Pulse width rotary inverter

• US 5,633,792 A
• Filed: 05/01/1995
• Issued: 05/27/1997
• Est. Priority Date: 05/01/1995
• Status: Expired due to Fees

• Current Assignee: John C.U. Massey
• Original Assignee: John C.U. Massey
• Inventors: Massey, John C. U.
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): BERHANE, ADOLF D
• Application Number:
  US08/432,060
• Time in Patent Office: 757 Days
• Field of Search: 363/8, 363/41, 363/159, 363/102, 363/109, 363/174, 310/24, 310/25, 310/29, 310/32, 310/59, 310/10.1, 310/186, 310/129, 310/160, 322/46, 322/14, 322/32, 200/564, 318/720, 318/721, 171/123, 290/31
• US Class Current: 363/109
• CPC Class Codes: H02M 7/60 wherein the parts are rotating and collectors co-operate with brushes or rollers

Abstract

A rotary type inverter capable of generating a variable pulse train electro-mechanically for converting D.C. to A.C. with a Sine wave shape, and consists primarily of a D.C. electric motor driving a "variable pulse width" generating drum. Mounted over this drum are electrical current collecting sliding brushes. These are first: To bring in input D.C. source voltage to an electrically conductive slip ring imbedded 360 degrees into a solid drum made of electrically insulating material; Second: To collect the A.C. voltage output generated by electrically conductive segments of variable widths, also imbedded upon and around this electrically insulating drum material.

Claims

1. A rotary inverter capable of converting a D.C. power source of not less than one Kilowatt to an A.C. output power, by generating a variable pulse train electro-mechanically, and said rotary type inverter comprising a D.C. motor driven Pure Sine Wave generating rotating drum assembly which comprises a solid electrically insulating drum material;

upon and around part of this drum is embedded a smooth electrically conductive surface with a specific contour or pattern cut, and this conductive shell is made up of a 360 degree slip ring in the center and two contiguous adjoining parts, each one covering 180 degrees of the said drum, and patterned with segments having each a specific circumferential width and also with each having a specific non-conducting smooth space between each segment; and

riding over this said sine wave drum assembly are electrical brush collectors, one brush riding over the central slip ring, brings in the D.C. input source voltage, while the other two brushes, riding over the segmented surfaces, alternately collect and give out the A.C. output power.

2. A rotary inverter, same as in claim 1, but capable of generating polyphase A.C. power output, simply by adding extra sine wave generating drums on the same common D.C. motor driven shaft, and each drum is electrically &

mechanically oriented 120 degrees from each other, with extra sets of electrical collector brushes added over each Sine wave generating drum, and so connected that some of the collector brushes bring in the D.C. power input to each said Sine wave generating drum, and the other collector brushes take the output A.C. power to a polyphase electrical load system.

3. A rotary inverter, same as in claim 1, with the added capability of generating a different wave form other than said sine wave;

with the essential difference being that on the said sine wave generating drum, the two contiguous electrically conductive and segmented surfaces imbedded thereon, have conductive and insulated segment parameters totally different from that required for a sine wave form, and have specific circumferential widths and spacings required to generate a specific shape.

4. A rotary inverter, same as in claim 1, with the additional capability of generating a variable Sine wave frequency by using the same method of generating variable pulse train electro-mechanically and by a D.C. motor speed control to the D.C. motor driving the Sine wave generating drum.

5. A rotary type inverter, same as in claim 1, with an additional set of brushes riding on an additional conductive polarity reversing segment imbedded into the said Sine wave generating drum insulation, is for application when the A.C. output voltage is single-phase only and need not be greater than the D.C. source voltage load, and takes the place of a center tap transformer D.C. return, or replaces the center tap of a 3 phase Star transformer primary for the D.C. return.