Safe electromagnetic chuck circuit
An electromagnetic chuck and circuit technology, applied in the direction of electromagnets with armatures, electromagnets, magnetic separation, etc., to achieve the effect of protecting personal safety
Active Publication Date: 2014-12-17
云南省曲靖双友钢铁有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to provide a safe electromagnetic chuck circuit to solve the shortcomings of using electromagnetic chuck technology in existing crushing production, driving handling or loading and unloading work
Method used
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Embodiment Construction
[0010] The technical solution will be described in detail below in conjunction with the accompanying drawings as an embodiment.
[0011] refer to figure 1 , taking the electromagnetic chuck with MW1800 electromagnetic coil and 91A current as an example, when selecting the 1:1 isolation transformer T2, the power must be greater than the power of the electromagnetic chuck L, and the SC-50KVA transformer is used as the isolation transformer T2, which is connected in series with the main three-phase power supply. In the loop, the shell E must be reliably grounded. The main circuit fuse FU1-3 uses RL1-100A devices to be connected in series on the secondary contacts a, b and c of the isolation transformer with a voltage of 380V. The isolation switch SQ and the matching fuse QF are respectively connected to the system transformer T1 Secondary and primary winding of isolation transformer T2. The neutral line N of the system transformer is connected to the earth through the grounding...
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The invention relates to a safe electromagnetic chuck circuit. The safe electromagnetic chuck circuit is characterized in that an isolating transformer T2 is in series connection between a transformer T1 in the electromagnetic chuck circuit and a main loop fuse FU1-3 through an isolating switch SQ and a circuit breaker QF, and the isolating transformer T2 and the system transformer T1 have the identical power. When an electromagnetic chuck undergoes a phenomenon such as insulation dropping or one-point grounding (hulling) and the like, the technology disclosed by the invention is capable of keeping the electromagnetic chuck safely and reliably operating, protecting a rolling motor bearing and a mechanical bearing and protecting the personal safety of workers so that the work cannot be influenced. The safe electromagnetic chuck circuit disclosed by the invention is widely applied to the protection work of technical equipment for adsorbing and removing iron metal impurities for magnetic separation, logistic loading and unloading, travelling carry and various crushing operations.
Description
[0001] Field [0002] The invention relates to a safe electromagnetic chuck circuit. technical background [0003] Electromagnetic chucks are widely used in production fields such as magnetic separation, logistics loading and unloading, driving handling, and various crushing, to absorb ferrous metal debris and protect mechanical equipment; however, the working circuit of the electromagnetic chuck is different from the related devices in the working system. The insulation problems of motor bearings and mechanical bearings are difficult to effectively solve, which in turn endangers the personal safety of the staff and causes damage to the corresponding mechanical devices. Because the output voltage of the transformer T1 used in the system is 380V or 220V, the neutral line N is grounded E. During the use of the driving 1, the electromagnetic chuck coil L and the rolling motor bearing M and the mechanical bearing G often break down and cannot be used, which affects the work and t...
Claims
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IPC IPC(8): B03C1/02B02C23/08B66C1/08B25J15/06H01F7/18
Inventor 王世立
Owner 云南省曲靖双友钢铁有限公司