35 results about "Low tension coil" patented technology

The invention discloses a mining flame-proof type frequency conversion mobile substation. The mining flame-proof type frequency conversion mobile substation comprises an iron core, a high-tension coil, a low-tension coil and an auxiliary coil, wherein the low-tension coil is arranged at the outer side of the high-tension coil, and the auxiliary coil is positioned below the low-tension coil; the low-tension coil comprises nine secondary windings; an upper yoke iron and a lower yoke iron of the iron core are bound through a unidirectional binding tape, and a clamp comprises an upper clamp and a lower clamp which are fastened through a pulling plate; and the substation also comprises a flame-proof shell and a flame-proof switch, a metal bellows is arranged on the outer wall of the flame-proof shell, the flame-proof switch is a high-voltage vacuum switch, a base is fixedly connected under the flame-proof shell, and the lower surface of the base is connected with rolling wheels through shafts. Due to the adoption of the technical scheme, the mining flame-proof type frequency conversion mobile substation can be used for realizing the soft start of underground mining equipment and the frequency control in operation and has the advantages of strong capacity of resisting disturbance, good heat dissipation effect and low distortion rate of harmonic currents.

The invention discloses an insulation device on a high-tension coil of a dry-type transformer. The structure of the insulation device comprises clamping grooves, a supporting base, a heat sink, iron cores, iron core columns, an insulation device body, high-tension insulators, wiring terminals, conductive columns, high-tension connecting rods and high-tension leads. In order to achieve the purposethat by means of the insulation device on the high-tension coil of the dry-type transformer, the high-tension coil can be movably detached and the size of the high-tension coil can be changed to control the voltage decrease value, the insulation device body is arranged on the iron cores, the insulation device body is matched with hexagonal screws through an insulation cover plate, so that the high-tension coil and a low-tension coil are movably detached, it is convenient to control the voltage decrease value through changing the sizes of the high-tension coil and the low-tension coil, the useefficiency of the high-tension coil and the low-tension coil is improved, and the voltage decrease efficiency is improved with at least two wiring terminals arranged on the insulation device body.

The invention discloses a low-temperature distressing thermal treatment process for a precise cold-rolled extremely-thin stainless steel strip. The low-temperature distressing thermal treatment process comprises the following steps of 1) selecting a finish-rolled finished product steel coil, wherein flatness of the selected steel coil is 1.0-1.5mm; 2) carrying out stretch-bending straightening treatment: carrying out constant-stretching-mode stretch-bending straightening on the selected steel coil, and finally controlling the flatness of the steel coil to be 0.30-0.50mm; 3) carrying out low-temperature thermal treatment: carrying out low-temperature distressing thermal treatment on the steel strip subjected to the stretch-bending straightening treatment at a thermal treatment temperature being 400-780 DEG C, and adopting protective gas in a low-temperature thermal treatment process; and 4) carrying out low-tension coil separating. The low-temperature distressing thermal treatment process for the precise cold-rolled extremely-thin stainless steel strip disclosed by the invention adopts the process technical scheme of removing internal stress generated by steel strip rolling and follow-up stretch-bending straightening through low-temperature thermal treatment, so that when the precise cold-rolled extremely-thin stainless steel strip which is used for parts of tablet personal computers, keyboard back boards, middle boards / backboards of mobile phones and the like is subjected to stamping forming and chemical corrosion, deformation is not liable to cause.

The coil spacer structure according to an embodiment of the present disclosure includes a body block, a low tension coil support member coupled to the body block, and a high tension coil support member coupled to the body block. A plurality of protrusions are formed on an outer peripheral portion of the body block, and a first groove is formed between the protrusions.

The invention relates to a wind power transformer and a manufacture method, wherein the wind power transformer comprises an iron core, a low tension coil with insulating ends and a high tension coil. A protection screen arranged between the low tension coil and the high tension coil, which surrounds the outer surface of the low tension coil for one cycle. The head and the tail ends of the protection screen are lapped, and an insulation separator is arranged between the lapped two ends. When wind power grid system has excess voltages of instantaneous mutation, the wind power transformer can prevent the low tension coil, and an alternating-current winding of a wind-driven generator and a low voltage control system which are connected with the low tension coil from invading by excess voltages, thereby ensuring running safety of the wind power transformer, the wind-driven generator and the low voltage control system.

The invention discloses a heat pipe cooling dry-type transformer. The transformer comprises an iron core, a low-tension coil and a high-tension coil which are arranged on the iron core, the outer sides of the upper end and the lower end of the iron core are fixed with clamping pieces, and the iron core, the low-tension coil, the high-tension coil and the clamping pieces are arranged inside a transformer box body. The transformer is characterized in that the high-tension coil is connected with a high pressure control cabinet, a microcontroller and a transformer temperature controller are arranged on the transformer box body, and the transformer temperature controller is connected with the microcontroller; the iron core is fixed with a superconductivity heat pipe, a voltage transformation system circuit is arranged in the high pressure control cabinet, the voltage transformation system circuit comprises a high-voltage outgoing line circuit and a high-voltage incoming line circuit, and the high-voltage outgoing line circuit and the high-voltage incoming line circuit are connected with each other. The heat pipe cooling dry-type transformer has the advantages that the temperature of thehighest point of the transformer is reduced by the heat pipe, the iron core has a maximum temperature in the whole dry-type transformer, a heat dissipating air passage and the superconductivity heatpipe are installed on the original iron core structure, thereby the heat dissipating effect of the iron core is far better than that of the original iron core, the temperature of the iron core with the highest temperature of the transformer can be reduced in time, and therefore the temperature of the whole transformer can be reduced.

The invention provides a detection apparatus used for simulating the impact of a coil on a platen in a short circuit of a transformer. The apparatus comprises a horizontally arranged hammerhead, a base, a bracing frame composed of guiding assemblies vertically arranged at two sides of the base, a hydraulic system and a measurement control system, wherein a clamp, a sensor and a force transmission rack are coaxially piled up on the base in sequence, and the upper surface of the force transmission rack is uniformly provided with waveform generators. The apparatus can simulate coil impact effects under the working conditions of individual operation of high-tension or low-tension coils or combined operation of high-tension and low-tension coils, avoids the limitation of simulation of only combined operation of coils, and can simulate actual impact conditions and magnitude and meet requirements of detection of multiple types of platens; the apparatus is simple in structure and manufacturing, low in cost and easy in installation and dismounting; the apparatus is provided with a through hole extending from top to bottom, which facilitates observation of the states of a detected sample in the process of detection; and the apparatus is provided with multiple safety protection measures, so in multiple aspects, the hammerhead is prevented from harming workers and the apparatus due to accidental falling during working of the apparatus.

The invention discloses a mining flame-proof type frequency conversion mobile substation. The mining flame-proof type frequency conversion mobile substation comprises an iron core, a high-tension coil, a low-tension coil and an auxiliary coil, wherein the low-tension coil is arranged at the outer side of the high-tension coil, and the auxiliary coil is positioned below the low-tension coil; the low-tension coil comprises nine secondary windings; an upper yoke iron and a lower yoke iron of the iron core are bound through a unidirectional binding tape, and a clamp comprises an upper clamp and a lower clamp which are fastened through a pulling plate; and the substation also comprises a flame-proof shell and a flame-proof switch, a metal bellows is arranged on the outer wall of the flame-proof shell, the flame-proof switch is a high-voltage vacuum switch, a base is fixedly connected under the flame-proof shell, and the lower surface of the base is connected with rolling wheels through shafts. Due to the adoption of the technical scheme, the mining flame-proof type frequency conversion mobile substation can be used for realizing the soft start of underground mining equipment and the frequency control in operation and has the advantages of strong capacity of resisting disturbance, good heat dissipation effect and low distortion rate of harmonic currents.

The invention discloses a traction transformer, belongs to the technical field of transformers, and solves the problems of low short-circuit resistance, running stability and reliability and the like in the prior art. The traction transformer comprises a single-frame double-column iron core and two columns of high tension coils which are connected in parallel and wound on the iron core; low tension coils T and F are also arranged in the two columns of high tension coils; the low tension coils T and F comprise four one-fourth-column coils T and four one-fourth-column coils F respectively, the coil turns of each one-fourth column are the same, the four one-fourth-column coils T and the four one-fourth-column coils F are averagely distributed in two columns of high tension coils and are symmetrical to each other, the low tension coils of the same name in the same column of the high tension coil are connected in series, and the low tension coils of the same name, which are connected in series, in the two columns of the high tension coils are connected in parallel; and the low tension coil T and the low tension coil F which have a parallel structure are connected in series. The traction transformer can effectively improve short-circuit resistance capacity, and improve running safety reliability.

The invention discloses a transformer skeleton with a shielding function. The transformer skeleton comprises a skeleton body, wherein the skeleton body comprises an upper transverse plate, a lower transverse plate and a middle winding frame; the upper transverse plate comprises a high-tension coil transverse plate and a low-tension coil transverse plate; the high-tension coil transverse plate is arranged on the left side of the upper part of the middle winding frame, and the low-tension coil transverse plate is arranged on the right side of the upper part of the middle winding frame; a shielding hole is formed in the middle winding frame; a shielding plate is arranged in the shielding hole; and the shielding plate comprises a transverse beam, a shielding clamping strip, a first shielding baffle plate and a second shielding baffle plate. The transformer skeleton is reasonable in structural design and low in production cost, coils are isolated from one another, the potential safety hazards such as coil short connection are eliminated, the shielding effect is good, the electromagnetic interference problem of a transformer is effectively improved, the shielding plate is simple and convenient to disassemble, manpower and material resources are saved, and the service life of the transformer is prolonged.