Electric motor drive unit for on-load tap-changers
A technology of on-load tap-off and drive unit, which is applied to the power devices, electrical switches, electrical components and other directions inside the switch, can solve the problems of increasing production and assembly costs, complex motor drive units, and large production and assembly costs. cost reduction effect
Active Publication Date: 2009-08-12
HITACHI ENERGY SWITZERLAND AG
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Problems solved by technology
[0005] Motor drive units for tap-changers are rather complex and their production and assembly costs are considerable
Further, motor drive units are largely custom-designed based on customer requirements, which further increases their production and assembly costs
Method used
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[0018] In the following description, for purposes of illustration and not limitation, specific details such as specific techniques and applications are given in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from the specific details above. In other instances, detailed descriptions of well-known methods and devices are omitted in order not to obscure the description of the present invention with unnecessary detail.
[0019] will now refer to Figure 1-Figure 2 Embodiments of the present invention will be described.
[0020] The on-load tap changer 1 includes: a motor drive box 2 , a shaft system 3 , a diverter switch 4 and a selector 5 installed under the diverter switch 4 . Alternatively, the selector 5 and the toggle switch 4 are combined into the same unit.
[0021] The motor drive box 2 accommodates the motor drive uni...
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The present invention relates to a motor drive cabinet (2) in an on-load tap-changer, comprising an electric motor drive unit and a control unit (12). The electric motor drive unit comprises an electric motor (6), a gearbox (7) and a position transmitter (9), wherein said control unit (12) is arranged to control an outgoing axis (3) outgoing from said motor drive cabinet (2) by feeding said electric motor (6) through direct connection to drive said outgoing axis (3) through said gearbox (7), and wherein said position transmitter (9) is arranged to detect movement and position of said outgoing axis (3) and to provide indications thereof to said control unit (12), and wherein said motor drive cabinet (2) is sealed during use with said electric motor drive unit and control unit (12) within that sealing.
Description
technical field [0001] The present invention relates generally to on-load tap-changers, and more particularly to motor drive units for on-load tap-changers. Background technique [0002] The on-load tap-changer is usually used in the power transformer in the grid, wherein the function of the on-load tap-changer is mainly to maintain the constant voltage output of the transformer. Certain on-load tap-changers are used in transformers whose function is to control the power of the transformer by regulating the voltage. An on-load tap-changer can be described as a mechanical switching device that will change the turns ratio in a transformer without interrupting the load current. This makes it possible to maintain a constant voltage output from the transformer and to compensate for load variations. [0003] A common on-load tap-changer generally includes a motor drive unit, a shaft system, a diverter switch with a housing and a selector mounted below the diverter switch. This ...
Claims
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IPC IPC(8): H01H9/00H01F29/02
CPCH01H9/0027H01H2009/0061H01H2003/266H01H3/26H01F29/02
Inventor H·布洛姆奎斯特M·珀罗斯J·埃肯格伦J·玛撒L·科诺夫L·G·埃里克森T·弗拉森H·奥斯特霍尔姆P·埃里克森
Owner HITACHI ENERGY SWITZERLAND AG