Superconducting magnet periodic lifting magnetic circuit and control method thereof
A technology of superconducting magnets and circuits, applied in the direction of superconducting magnets/coils, circuits, magnetic objects, etc., can solve problems such as energy consumption, and achieve the effects of small voltage rise rate, strong practicability, and ingenious structure
Pending Publication Date: 2022-02-18
江苏旌凯中科超导高技术有限公司
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Problems solved by technology
If the previous lifting magnetic method is adopted, it means that the superconducting electromagnetic slurry magnetic separator consumes more energy than the conventional electromagnetic slurry magnetic separator
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[0043] See attached figure 1 , The lifting magnetic circuit of the superconducting electromagnetic slurry magnetic separator includes 2 fully-controlled power switches, 3 power diodes, 1 energy storage capacitor and 1 programmable DC power supply. Two power switches and two power diodes constitute the four bridge arms of the H-shaped circuit. The power switching device is fully controlled, preferably an IGBT, which is represented by an IGBT circuit symbol in the drawings. R1 and R2 represent the resistance of all cables and joints in the electrical connection between the two lead wires of the superconducting coil and points c and d of the circuit, respectively.
[0044] In order to better understand the present invention and distinguish it from the prior art, in the appended figure 1 In the shown embodiment, the working mode of the circuit is divided into 7 different states, and the 5 states are as attached figure 2 ~ attached Figure 6 shown. The path and direction of t...
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The invention discloses a superconducting magnet periodic magnet periodic lifting magnetic circuit and a control method thereof. The circuit comprises two power switches, three power diodes, a capacitor and a programmable direct-current power source, the two power switches and the two power diodes form four bridge arms of an H-type circuit, and a superconducting coil is located in the center of the H-type circuit; the arrangement mode of four bridge arms of the H-type circuit is that current can only flow through the superconducting coil in one direction; and the direct-current power supply is connected in series with one power diode to form a power supply branch and then is connected in parallel with the H-type circuit. The method has the advantages that 1, energy is saved, after current control enters a normal working time sequence, a direct-current power source taking electricity from a power grid only needs to supplement a small part of energy consumed by the circuit, and therefore a magnetic separator is converted into energy-saving equipment from high-energy-consumption equipment; 2, the efficiency is high, concretely, the working efficiency of the magnetic separator is maximized while the stability of the superconducting coil is considered; and 3, reliability is realized, and the risk of simultaneous conduction of bridge arms at the same side does not exist.
Description
technical field [0001] The invention belongs to the technical field of electric energy conversion, and in particular relates to a periodic lifting and lowering magnetic circuit of a superconducting magnet used in an electromagnetic slurry magnetic separator and a control method thereof. Background technique [0002] The magnetic system is the key functional part of the electromagnetic slurry magnetic separator, which consists of coils, iron armor and magnetic poles. The basic principle of the electromagnetic slurry magnetic separator is: when the coil is loaded with current, the magnetic field corresponding to the current will fill the space where the magnetic gathering medium is located, and the magnetic ore particles will be captured by the magnetic gathering medium under the action of the magnetic field force; when the capture volume is close to saturation When the coil current is reduced to zero, the magnetic field is reduced to zero, and the magnetic force disappears. T...
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Login to View More IPC IPC(8): H02M3/158H01F6/00B03C1/033
CPCH02M3/158H01F6/006B03C1/0337
Inventor 徐风雨孙益唐伟军马仲英
Owner 江苏旌凯中科超导高技术有限公司