Energy store for an on-load tap changer

Abstract

The invention relates to an energy store for an on-load tap changer. The general inventive concept consists in specifying an energy store for an on-load tap changer, in which a first gearwheel (2), which is in the form of a sun wheel, is mounted fixedly on a rotatable drive shaft (1), which extends in the longitudinal direction, the teeth on which first gearwheel (2) can be engaged with a plurality of further gearwheels (3), which are in the form of planet wheels and themselves each in turn roll along an inner circumferential face, which has a corresponding tooth system, of a first hollow gear (4) with a larger diameter. Furthermore, a web shaft (11), in the form of a vane, is mounted such that it can rotate on the rotatable drive shaft (1), in which web shaft (11) each vane is operatively connected on the one hand to a further gearwheel (3) which is in the form of a planet wheel, and on the other hand to the first end of a spring (16). Furthermore, a frame (10) which is in the form of an arm is provided and clasps, providing a bearing therefor, the second, smaller diameter, which is in the form of an output drive shaft (9), of the hollow gear (4), the second end of the corresponding spring (16) being attached to the respective arm of said frame (10), such that the respective tension springs (16) can on the one hand be loaded between the corresponding holders (15, 17) by means of a rotary movement of the web shaft (11) and on the other hand cause the web shaft (11) to rotate in the opposite direction to the upward direction, in the event of the actual rapid switching process of the on-load tap changer. This energy store according to the invention therefore does not require technically complex conversion of an initial translational upward movement to a rapid rotational main movement, as required for the actual on-load tap changing process, for operation of the switching contacts.

Description

technical field [0001] The invention relates to an energy store for an on-load tap changer. Background technique [0002] Tap changers are known for switching between different winding taps of tapped transformers without interruption and thus for voltage regulation. It usually consists of a selector for powerlessly preselecting a winding tap of a tapped transformer to switch to, and a load switching for practically uninterrupted switching from a previously switched on winding tap to a new preselected winding tap switch. For this purpose, the load changeover switch has the components required for such uninterrupted rapid switching, in particular an energy store, a plurality of switching contacts (which can be mechanical switching contacts, vacuum switching cabinets or thyristors), and Means for actuating the switch contacts in a predetermined switching sequence during each switching process. [0003] The energy store known from the prior art is tensioned, ie tensioned, by ...

AI Technical Summary

Problems solved by technology

The cumbersome conversion of the rotary motion into a translational motion and back to a rotary motion requires a high space requirement for the accumulator structure and also requires a large number of complex individual components

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