Rectifier circuit provoding compression of the dynamic range of the output voltage
First Claim
1. A rectifier circuit comprising, in combination:
- A. an AC source subject to variation in voltage over a large dynamic range, said source including(1) a winding in which a voltage is induced having at least first and second winding sections with corresponding one ends thereof commonly connected to a neutral point and corresponding other ends thereof respectively connected to separate AC output terminals; and
(2) each said first and second winding sections having a tap at a location uniformly spaced from said neutral point;
B. first and second DC voltage buses;
C. first rectifier means poled in a first direction and having input terminals respectively connected between said AC output terminals and a first DC terminal;
D. second rectifier means poled in a second direction opposite said first direction and having input terminals respectively connected between said AC output terminals and a second DC terminal;
E. a first switch connecting said first DC terminal to said first DC bus;
F. a second switch connecting said second DC terminal to said second DC bus;
G. third rectifier means poled in said first direction and having input terminals respectively connected between said taps and said first DC bus;
H. fourth rectifier means poled in said second direction and connecting said neutral point to said second DC bus; and
I. a control circuit operating in response to the DC output voltage across said first and second DC buses for selectively opening and closing said first and second switches such as to limit the DC output voltage to a dynamic range smaller than the dynamic voltage range of said AC source.
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Accused Products
Abstract
The output terminals of a three-phase, wye-connected AC source, whose voltage varies over a wide dynamic range, are connected to a pair of DC voltage buses through a pair of oppositely poled, half-wave rectifier networks and a pair of switches. Taps uniformly positioned on the phase windings are brought out through another half-wave rectifier network directly to one bus, and the source neutral is connected directly to the other bus through a diode. A control circuit, operating in response to the DC voltage appearing across the buses, opens and closes the switches to selectively switch the rectifier networks and diode in and out so as to limit the DC voltage to a predetermined, compressed dynamic range.
31 Citations
19 Claims
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1. A rectifier circuit comprising, in combination:
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A. an AC source subject to variation in voltage over a large dynamic range, said source including (1) a winding in which a voltage is induced having at least first and second winding sections with corresponding one ends thereof commonly connected to a neutral point and corresponding other ends thereof respectively connected to separate AC output terminals; and (2) each said first and second winding sections having a tap at a location uniformly spaced from said neutral point; B. first and second DC voltage buses; C. first rectifier means poled in a first direction and having input terminals respectively connected between said AC output terminals and a first DC terminal; D. second rectifier means poled in a second direction opposite said first direction and having input terminals respectively connected between said AC output terminals and a second DC terminal; E. a first switch connecting said first DC terminal to said first DC bus; F. a second switch connecting said second DC terminal to said second DC bus; G. third rectifier means poled in said first direction and having input terminals respectively connected between said taps and said first DC bus; H. fourth rectifier means poled in said second direction and connecting said neutral point to said second DC bus; and I. a control circuit operating in response to the DC output voltage across said first and second DC buses for selectively opening and closing said first and second switches such as to limit the DC output voltage to a dynamic range smaller than the dynamic voltage range of said AC source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A polyphase rectifier circuit comprising, in combination:
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A. a polyphase AC source subject to variation in voltage over a large dynamic range, said source including (1) three phase windings in which a voltage is induced having corresponding one ends thereof commonly connected to a neutral point and corresponding other ends thereof respectively connected to separate AC output terminals; and (2) each said phase winding having a tap at location uniformly spaced from said neutral point; B. first and second DC voltage buses; C. a first set of three half-wave rectifiers poled in a first direction and having separate input terminals respectively connected between said AC output terminals and a first common DC terminal; D. a second set of three half-wave rectifiers poled in a second direction opposite said first direction and having separate input terminals respectively connected between said AC output terminals and a second common DC terminal; E. a first switch connecting said first DC terminal to said first DC bus; F. a second switch connecting said second DC terminal to said second DC bus; G. a third set of three half-wave rectifiers poled in said first direction and having separate input terminals respectively connected between said taps and said first DC bus; H. a fourth half-wave rectifier poled in said second direction and connecting said neutral point to said second DC bus; and I. a control circuit operating in response to the DC voltage across said first and second DC buses for selectively opening and closing said first and second switches such as to limit the DC output voltage to a dynamic range smaller than the dynamic voltage range of said AC source. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification