GB Patent: GB-1,203,763
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| Improvements in or Relating to Electric Rectifying Systems
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Patentee:
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| Kenneth Arthur Robinson (exact or similar names) - Etchinghill, Kent County, England |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 13, 1966 |
| Granted: |
Sep. 03, 1970 |
Espacenet patent
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Joel Havens
"Vintage Machinery" entry for Lancashire Dynamo & Motor Co., Ltd.
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Description: |
| Thorn Automation, Ltd. was the successor to Lancashire Dynamo Electronic Products, Ltd.
Abstract:
In a rectifying system having output terminals connected to a capacitor C for smoothing the output, the capacitor C is allowed to charge via a diode D 1 whilst the rectified voltage is approaching its peak value and a gate Th 1 is so arranged and controlled as to connect the capacitor directly via the gate across the output terminals at a predetermined interval after the rectified voltage has passed its peak. With the thyristor Th 1 turned OFF capacitor C charges from period A (Fig. 3, not shown), when the rectified supply voltage equals the load voltage until the peak voltage is reached (at B). The capacitor is then prevented from discharging until the thyristor Th 1 is fired (at D) and continues to discharge until the thyristor is switched OFF (at C) when the voltage in the next half cycle reaches a value corresponding to that (at A) when the capacitor begins to charge. The thyristor may be arranged to fire whenever the voltage across the load reaches a preset value after its peak or it may be time controlled so as to fire in a predetermined phase relationship after the peak of the alternating current supply. |
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