Variable voltage direct current power supply and motor speed con

Details Variable voltage direct current power supply and motor speed con Variable voltage direct current power supply and motor speed con

1980-02-19

1982-05-18

Shoop, William M.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 53, 363 70, 323344, 323340, 318344, H02M 706

Patent

active

043308180

ABSTRACT:
A continuously variable voltage direct current power supply having first and second output terminals is provided using a variable transformer with a core of magnetically permeable material encircled by at least one electrical winding, with segments of winding turns being exposed along two spaced traverse paths. First and second electrically conductive brushes are simultaneously movable along these respective paths, with at least one brush at all times contacting an exposed segment. Rectifiers connect the first brush to the first output terminal and the second output terminal to said first brush. Rectifiers connect the second brush to the first output terminal and the second output terminal to said second brush. Rectifiers connect a winding terminal to the first output terminal and the second output terminal to said winding terminal. Turn-to-turn short-circuit AC current between the adjoining turns contacted by the brushes is eliminated by employing a transformer winding having a turn-to-turn voltage which is less than the forward turnon voltage through two or more rectifiers. Turn-to-turn current can only flow from one brush to the other through at least two rectifiers plus the resistance of the electrical load. The variable transformer may include both primary and secondary windings or be an autotransformer. Single-phase or multi-phase variable transformers can be used, and advantageous DC power control is effectuated considerably more economically than heretofore, for example, to control the speed of large (multiple Horse Power) DC motors.

REFERENCES:
patent: 2926295 (1960-02-01), Allen
patent: 2967270 (1961-01-01), Drenning
patent: 3089074 (1963-05-01), Vaughan
patent: 3154731 (1964-10-01), Sussman et al.
patent: 3663828 (1972-05-01), Low et al.
patent: 3820002 (1974-06-01), Wildi
patent: 3921055 (1975-11-01), Dorsey
patent: 4045708 (1977-08-01), Neal
patent: 4189672 (1980-02-01), Peschel

Affiliated with

Also associated with

Rating

Variable voltage direct current power supply and motor speed con does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable voltage direct current power supply and motor speed con, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable voltage direct current power supply and motor speed con will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-489107