Axial adaptive bistable permanent magnetic mechanism with opening acceleration
A permanent magnet mechanism and acceleration technology, which is applied to power devices inside switches, high-voltage air circuit breakers, electrical components, etc., can solve problems such as increasing fault points, increasing the risk of electrical faults, and increasing the cost of DC power systems, and achieves improved points. effect of brake speed, improved stability and usability
Active Publication Date: 2014-11-26
NINGXIA LICHENG ELECTRIC GROUP
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Problems solved by technology
[0005] The problems in the implementation of these design schemes are: (1) There are many mechanical transmission parts, the number of fault points increases, the transmission loss is large, and the opening speed is not significantly improved; (2) The consequence of increasing the opening current value to increase the opening speed is Increases the cost of the DC power system and also increases the risk of electrical failure
(3) Utilizing the traditional permanent magnet mechanism moving iron core positioning and guiding design scheme, the structure of the permanent magnet mechanism is complicated and the volume is increased; therefore, under the background of simplifying the traditional product structure, a design that can significantly increase the opening speed The permanent magnet mechanism has more practical significance
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[0018] Such as figure 1 , 2 , 3, the present invention is a kind of axial self-adaptive bistable permanent magnet mechanism with opening acceleration, comprising an output shaft 12, a moving iron core 11, a self-lubricating guide sleeve 7, a self-lubricating guide sleeve 7, Buffer 9, the opening coil 2, the static iron core 3, the closing coil 6 and the outer magnetic yoke 5 are set outside the moving iron core 11, and the top cover 1 and the bottom cover 8 installed beside the two ends of the output shaft 12 In addition, a tile-shaped magnet 4 is installed between the middle part of the outer yoke 5 and the static iron core 3. The outer yoke 5 is a hollow cylinder, and a magnetic short-circuit ring 13 is arranged in its inner cavity. The magnetic short-circuit ring 13 and A magnetic short-circuit air gap 18 is arranged between the static iron cores 3 .
[0019] Such as Figure 4 As shown, the moving iron core 11 is a hollow cylinder, and an axial pressure relief groove 14 ...
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The invention relates to the field of permanent magnetic mechanisms of medium-voltage vacuum circuit breakers, particularly to an axial adaptive bistable permanent magnetic mechanism with opening acceleration. The mechanism comprises an output shaft (12); a movable iron core (11) is sleeved outside the output shaft (12); and a self-lubricating guide sleeve (7), a bufferer (9), an opening solenoid (2), a static iron core (3), a closing solenoid (6) and an outer yoke (5) are sleeved outside the movable iron core (11). The mechanism is characterized in that the outer yoke (5) is a hollow cylinder, a magnetic short circuit ring (13) is arranged in the inner cavity of the outer yoke (5), and a magnetic short circuit air gap (18) is arranged between the magnetic short circuit ring (13) and the static iron core (3). The permanent magnetic mechanism has the advantages that the opening speed is improved obviously on the basis of simplification of the existing product structure, and the stability and practicability of the vacuum circuit breaker with the permanent magnetic mechanism are improved.
Description
technical field [0001] The invention relates to the field of permanent magnet mechanisms of medium-voltage vacuum circuit breakers, in particular to an axial self-adaptive bistable permanent magnet mechanism with opening acceleration. Background technique [0002] The operating mechanism is a key component of the medium voltage vacuum circuit breaker. Currently, there are two types of spring operating mechanism and permanent magnet operating mechanism that are widely used. The structure of the spring operating mechanism is complex, the probability of mechanical failure is high, and the workload of repair and maintenance is easy to occur, which brings a lot of inconvenience to the user unit. The bistable permanent magnet mechanism of the present invention is a kind of permanent magnet operating mechanism, which is widely used because of its simple structure and stable mechanical performance, and gradually has a development trend of replacing the spring operating mechanism. T...
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IPC IPC(8): H01H33/666H01H3/28
Inventor 牛广军徐志姬涛李发红
Owner NINGXIA LICHENG ELECTRIC GROUP