CN211209286U

CN211209286U - Low-voltage ride-through protection resistor of double-fed fan

Info

Publication number: CN211209286U
Application number: CN201921948458.4U
Authority: CN
Inventors: 刘昌衡
Original assignee: Shanghai Institute of Technology
Current assignee: Shanghai Institute of Technology
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-08-07
Anticipated expiration: 2029-11-11

Abstract

The utility model discloses a double-fed fan low pressure passes through protective resistor, including ceramic tube, the winding of the center department on ceramic tube surface is connected with the coil, and the both sides on ceramic tube surface are all fixed the cover and are equipped with the first lantern ring, and the surface of ceramic tube and the both sides that are located the coil are all fixed the cover and are equipped with the second lantern ring, the wiring hole has all been seted up at the top of the first lantern ring and the second lantern ring, and the left side on the positive surface of ceramic tube just is located fixedly connected with battery between the first lantern ring in left side and the second lantern ring. The utility model discloses a ceramic tube, coil, battery, the first lantern ring, the second lantern ring, high temperature resistant insulating varnish, first wire, cut-off switch, fuse, second wire and temperature sensor's use has solved current protection resistor and can produce a large amount of heats at the in-process that abnormal current flows in, and this kind of heat probably is not enough with resistor fusing, therefore can't cut off the circuit according to the temperature in real time, has reduced the problem of resistor protective properties.

Description

Low-voltage ride-through protection resistor of double-fed fan

Technical Field

The utility model relates to a double-fed fan technical field specifically is a double-fed fan low pressure passes through protection resistor.

Background

With the increasing global energy crisis and the increasing environmental pollution, renewable clean energy power generation represented by photovoltaic and wind energy is more and more emphasized, the energy resources in China are unevenly distributed, the need of large-scale long-distance electric energy transmission exists for a long time, the high-proportion renewable energy cluster grid connection becomes an important trend of future development of new energy power generation industry, wherein the converter required by the double-fed wind turbine generator set is small in capacity and small in power loss, and therefore the double-fed wind turbine generator set is widely applied to a wind power generation system.

The circuit of the doubly-fed fan needs to be protected in the using process, therefore, the resistor is usually connected in the circuit, the existing protection resistor generates a large amount of heat in the abnormal current inflow process, and the heat may not be enough to fuse the resistor, so that the circuit cannot be cut off in real time according to the temperature, and the protection performance of the resistor is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a double-fed fan low pressure passes through protection resistor possesses the advantage that can carry out the excess temperature protection to the circuit, has solved current protection resistor and can produce a large amount of heats at the in-process that abnormal current flowed in, and this kind of heat probably is not enough with the resistor fusing, therefore can't cut off the circuit in real time according to the temperature, has reduced the problem of resistor protection performance.

In order to achieve the above object, the utility model provides a following technical scheme: a double-fed fan low-voltage crossing protection resistor comprises a ceramic tube, wherein a coil is wound and connected at the center of the surface of the ceramic tube, first lantern rings are fixedly sleeved on the two sides of the surface of the ceramic tube, second lantern rings are fixedly sleeved on the surface of the ceramic tube and positioned on the two sides of the coil, wiring holes are formed in the tops of the first lantern rings and the second lantern rings, a storage battery is fixedly connected between the first lantern ring and the second lantern ring on the left side of the front surface of the ceramic tube and positioned on the left side, a disconnecting switch is fixedly connected between the first lantern ring and the second lantern ring on the left side of the top of the ceramic tube and positioned on the left side, first wires are electrically connected on the two sides of the disconnecting switch, one end, far away from the disconnecting switch, of the first wire on the left side is electrically connected to the top on the right side of the first lantern ring on the left side, the equal fixedly connected with fixed block in top of the relative one side of the first lantern ring in right side and second lantern ring, the recess has all been seted up to the relative one side of fixed block, the inner chamber fixedly connected with spring of recess, the relative one side fixedly connected with cassette of spring, the joint has the fuse between the relative one side of cassette, the top electric connection of cassette has the second wire, and the one end electric connection that the cassette was kept away from to left side second wire is in the top on right side second lantern ring right side, and the one end electric connection that the cassette was kept away from to right side second wire is in the left top of the first lantern ring in right side, fixedly connected with temperature sensor is located at the center.

Preferably, the surfaces of the coil, the first sleeve ring and the second sleeve ring are coated with high-temperature-resistant insulating paint, the temperature sensor is a contact type temperature sensor, the back surface of the temperature sensor is in contact with the front surface of the coil, and the first sleeve ring and the second sleeve ring are made of conductive metal.

Preferably, the left side of the front surface of the ceramic tube and the outer side of the storage battery are fixedly connected with a fixing shell, and the front surface of the fixing shell is fixedly connected with a cover plate through a screw.

Preferably, both sides of the ceramic tube are fixedly connected with a support, and the bottom of the support is provided with a mounting hole in a penetrating manner.

Preferably, the output end of the storage battery is respectively connected with the input ends of the disconnecting switch and the temperature sensor in a one-way electric connection mode through wires, and the output end of the temperature sensor is connected with the input end of the disconnecting switch through an electric signal.

Preferably, the holder is made of a conductive metal material, the support is not in contact with the first collar, and the holder is slidably connected with the inner cavity of the groove.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a ceramic tube, a coil, the battery, the first lantern ring, the second lantern ring, high temperature resistant insulating varnish, first wire, cut-off switch, the fuse, second wire and temperature sensor's use, can be at coil surface temperature automatic cutout circuit when too high, avoid appearing the emergence of conflagration, can carry out overload protection to the circuit simultaneously, the security of fan circuit has been improved, the in-process of having solved current protection resistor at the abnormal current inflow can produce a large amount of heats, and this kind of heat probably is not enough with resistor fusing, therefore can't cut off the circuit in real time according to the temperature, the problem of resistor protective property has been reduced.

2. The utility model discloses a use of support can conveniently fix rheostat, through the use in wiring hole, can conveniently insert the circuit with rheostat, through the use of high temperature resistant insulating varnish, can carry out insulation protection to resistance, avoids its short circuit, through the use of spring and cassette, can conveniently install the fuse, through temperature sensor's use, can conveniently detect the temperature on coil surface, through the use of battery, can be to temperature sensor and cut-off switch power supply.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged structural view of A in FIG. 1 according to the present invention;

FIG. 3 is an enlarged structural view of B in FIG. 1 according to the present invention;

fig. 4 is a front view structure diagram of the present invention.

In the figure: the device comprises a ceramic tube 1, a coil 2, a storage battery 3, a mounting hole 4, a first lantern ring 5, a second lantern ring 6, high-temperature-resistant insulating paint 7, a wiring hole 8, a support 9, a first lead 10, a disconnecting switch 11, a fixing block 12, a fuse 13, a clamping seat 14, a groove 15, a spring 16, a second lead 17 and a temperature sensor 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "connected", and the like are to be construed broadly, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses a ceramic pipe 1, coil 2, battery 3, first lantern ring 5, second lantern ring 6, high temperature resistant insulating varnish 7, support 9, first wire 10, cut-off switch 11, fixed block 12, fuse 13, cassette 14, spring 16, second wire 17 and temperature sensor 18 part are the general standard or the part that technical staff in the field knows, and its structure and principle all are that this technical staff all can learn through the technical manual or learn through conventional experimental method.

Referring to fig. 1-4, a double-fed fan low-voltage crossing protection resistor comprises a ceramic tube 1, wherein two sides of the ceramic tube 1 are fixedly connected with a support 9, the bottom of the support 9 is provided with a mounting hole 4 in a penetrating manner, the varistor can be conveniently fixed by using the support 9, a coil 2 is wound and connected at the center of the surface of the ceramic tube 1, two sides of the surface of the ceramic tube 1 are fixedly sleeved with a first sleeve ring 5, two sides of the surface of the ceramic tube 1, which are positioned on the coil 2, are fixedly sleeved with second sleeve rings 6, the surfaces of the coil 2, the first sleeve ring 5 and the second sleeve ring 6 are coated with high-temperature-resistant insulating paint 7, a temperature sensor 18 is a contact type temperature sensor, the back surface of the temperature sensor 18 is in contact with the front surface of the coil 2, the first sleeve ring 5 and the second sleeve ring 6 are made of conductive metal, and, the varistor can be conveniently connected into a circuit by using the wiring hole 8, the varistor can be conveniently connected into the circuit by the aid of the wiring hole 8 through the top of the first sleeve ring 5 and the second sleeve ring 6, the left side of the front surface of the ceramic tube 1 and the position between the first sleeve ring 5 and the second sleeve ring 6 on the left side are fixedly connected with the storage battery 3, the temperature sensor 18 and the cut-off switch 11 can be powered by the aid of the storage battery 3, the left side of the front surface of the ceramic tube 1 and the position on the outer side of the storage battery 3 are fixedly connected with the fixing shell, the front surface of the fixing shell is fixedly connected with the cover plate through screws, the left side of the top of the ceramic tube 1 and the position between the first sleeve ring 5 and the second sleeve ring 6 on the left side are fixedly connected with the cut-off switch 11, two sides of the cut-off switch 11 are electrically connected with the first lead wire 10, and one end, far away, one end of a right first lead wire 10 far away from a disconnecting switch 11 is electrically connected to the top of the left side of a left second sleeve ring 6, the tops of the opposite sides of the right first sleeve ring 5 and the second sleeve ring 6 are fixedly connected with a fixed block 12, one side of the opposite sides of the fixed block 12 is provided with a groove 15, an inner cavity of the groove 15 is fixedly connected with a spring 16, one side of the opposite side of the spring 16 is fixedly connected with a clamping seat 14, the fuse 13 can be conveniently installed through the use of the spring 16 and the clamping seat 14, the clamping seat 14 is made of conductive metal materials, the support 9 is not contacted with the first sleeve ring 5, the clamping seat 14 is in sliding connection with the inner cavity of the groove 15, the fuse 13 is clamped between the opposite sides of the clamping seat 14, the top of the clamping seat 14 is electrically connected with a second lead wire 17, one end of the left second lead wire 17 far away from the clamping seat 14 is electrically connected to the top, the center of the front surface of the coil 2 is fixedly connected with a temperature sensor 18, the temperature of the surface of the coil 2 can be conveniently detected by using the temperature sensor 18, the output end of the storage battery 3 is respectively and unidirectionally electrically connected with the input ends of the disconnecting switch 11 and the temperature sensor 18 through leads, the output end of the temperature sensor 18 is connected with the input end of the disconnecting switch 11 through electric signals, the circuit can be automatically cut off when the surface temperature of the coil 2 is overhigh through the use of the ceramic tube 1, the coil 2, the storage battery 3, the first sleeve ring 5, the second sleeve ring 6, the high-temperature-resistant insulating paint 7, the first lead 10, the disconnecting switch 11, the fuse 13, the second lead 17 and the temperature sensor 18, the occurrence of fire is avoided, meanwhile, the circuit can be subjected to overload protection, the safety of a fan circuit is improved, and the problem that the existing protective resistor can generate a large amount of heat in, and this heat may not be enough to blow the resistor, and thus the circuit cannot be cut off in real time according to the temperature, which reduces the protection performance of the resistor.

When the circuit is used, the rheostat is connected into the circuit according to the positive and negative electrodes, the left end of the rheostat is connected with the positive electrode, the right end of the rheostat is connected with the negative electrode, the detection value of the temperature sensor 18 is set in advance, when the circuit is abnormal, current passes through the rheostat, the temperature of the surface of the coil 2 is gradually increased, when the temperature sensor 18 reaches the detection value, a signal is transmitted to the cut-off switch 11, the cut-off switch 11 is automatically switched off, short circuit is caused between the first conducting wires 10, the whole circuit achieves a protection effect, meanwhile, overload protection is carried out on the circuit through the fuse 13, when the current is abnormally increased to a certain height and temperature, the fuse 13 fuses to cut off the current, when the current needs to be replaced, the fuse 13 is squeezed to one side, the clamping seat 14 on one side is moved, the other end of the fuse 13 is moved out of the clamping seat 14, achieving the replacement effect.

In summary, the following steps: the double-fed fan low-voltage ride-through protection resistor solves the problems that the conventional protection resistor can generate a large amount of heat in the abnormal current inflow process, the heat may not be enough to fuse the resistor, the circuit cannot be cut off in real time according to the temperature, and the protection performance of the resistor is reduced by using the ceramic tube 1, the coil 2, the storage battery 3, the first sleeve ring 5, the second sleeve ring 6, the high-temperature-resistant insulating paint 7, the first lead 10, the cut-off switch 11, the fuse 13, the second lead 17 and the temperature sensor 18.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a doubly-fed fan low pressure passes through protection resistor, includes ceramic pipe (1), its characterized in that: the winding of the center on the surface of the ceramic tube (1) is connected with a coil (2), two sides of the surface of the ceramic tube (1) are fixedly sleeved with a first lantern ring (5), two sides of the surface of the ceramic tube (1) and positioned on the coil (2) are fixedly sleeved with a second lantern ring (6), the tops of the first lantern ring (5) and the second lantern ring (6) are provided with wiring holes (8), the left side of the front surface of the ceramic tube (1) is fixedly connected with a storage battery (3) between the first lantern ring (5) and the second lantern ring (6) on the left side, the left side of the top of the ceramic tube (1) is fixedly connected with a cut-off switch (11) between the first lantern ring (5) on the left side and the second lantern ring (6) on the left side, two sides of the cut-off switch (11) are electrically connected with a first wire (10), one end of the first wire (10) on the left side, far away from the cut-off switch (11), is electrically connected, one end of a right first lead (10) far away from a disconnecting switch (11) is electrically connected to the top of the left side of a left second sleeve ring (6), the tops of the opposite sides of the right first sleeve ring (5) and the second sleeve ring (6) are fixedly connected with a fixed block (12), one side of the fixed block (12) opposite to the fixed block is provided with a groove (15), the inner cavity of the groove (15) is fixedly connected with a spring (16), one side of the spring (16) opposite to the fixed block (14) is fixedly connected with a clamping seat (14), a fuse (13) is clamped between the opposite sides of the clamping seat (14), the top of the clamping seat (14) is electrically connected with a second lead (17), one end of the left second lead (17) far away from the clamping seat (14) is electrically connected to the top of the right side of the right second sleeve ring (6), and one end of the right second lead (17) far away from the, and a temperature sensor (18) is fixedly connected to the center of the front surface of the coil (2).

2. The doubly-fed wind turbine low-voltage ride-through protection resistor of claim 1, wherein: the surface of the coil (2), the surface of the first lantern ring (5) and the surface of the second lantern ring (6) are coated with high-temperature-resistant insulating paint (7), the temperature sensor (18) is a contact type temperature sensor, the back surface of the temperature sensor (18) is in contact with the front surface of the coil (2), and the first lantern ring (5) and the second lantern ring (6) are made of conductive metal.

3. The doubly-fed wind turbine low-voltage ride-through protection resistor of claim 1, wherein: the left side of ceramic pipe (1) positive surface just is located the outside fixedly connected with set casing of battery (3), and the positive surface of set casing passes through screw fixedly connected with apron.

4. The doubly-fed wind turbine low-voltage ride-through protection resistor of claim 1, wherein: the ceramic tube is characterized in that supports (9) are fixedly connected to two sides of the ceramic tube (1), and mounting holes (4) are formed in the bottom of the bottoms of the supports (9) in a penetrating mode.

5. The doubly-fed wind turbine low-voltage ride-through protection resistor of claim 1, wherein: the output end of the storage battery (3) is respectively connected with the input ends of the cut-off switch (11) and the temperature sensor (18) in a one-way electric mode through a lead, and the output end of the temperature sensor (18) is connected with the input end of the cut-off switch (11) through an electric signal.

6. The doubly-fed wind turbine low-voltage ride-through protection resistor of claim 4, wherein: the clamping seat (14) is made of conductive metal, the support (9) is not in contact with the first sleeve ring (5), and the clamping seat (14) is in sliding connection with the inner cavity of the groove (15).