CN101277084A - Method and apparatus for flexibly starting high voltage motor - Google Patents
Method and apparatus for flexibly starting high voltage motor Download PDFInfo
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- CN101277084A CN101277084A CNA2008100050819A CN200810005081A CN101277084A CN 101277084 A CN101277084 A CN 101277084A CN A2008100050819 A CNA2008100050819 A CN A2008100050819A CN 200810005081 A CN200810005081 A CN 200810005081A CN 101277084 A CN101277084 A CN 101277084A
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- 239000007788 liquid Substances 0.000 description 9
- 230000008859 change Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 230000005284 excitation Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
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Abstract
The present invention discloses a soft starting method of a high voltage motor and a device thereof. According to the invention, an inductor with adjustable magnetic resistance is provided at each phase of electric power source at two ends of the operation power switch of the high voltage motor. The adjustment to the magnetic resistance of the inductor is realized by the relative movement between the inductor coil and the magnetic core of the inductor. The method of the invention has the advantages of small and smooth starting current, no harmonic pollution, no injuring effect to the electric motor, low cost, energy saving and strong overload capacity. The method is mainly used for the soft starting and soft stopping of the high voltage motor.
Description
Technical field
The present invention relates to motor Drag Control field.Relate in particular to a kind of flexibly starting high voltage motor device.Mainly be applicable to be serially connected in the Stator of HV Electromotor loop, carry out the pressure regulation soft start, be specially adapted to more than the 500KW, soft start, the soft stop of 6-10KV high-power high voltage motor.
Background technology
At present, have multiple for flexibly starting high voltage motor method and device, the general starting equipment that adopts reactor as the high-power high voltage motor, though it is simple in structure, but because reactance (impedance) value immobilizes in the starting process, starting characteristic is harder, and easily produces secondary pulse, and apolegamy also can not cause the phenomenon of fail to start at that time.Useful in addition thyristor carry out pressure regulation, with liquid resistance carry out pressure regulation, with the excitation mode pressure regulation etc.What carry out pressure regulation with thyristor is the solid soft start that directly adopts thyristor to carry out pressure regulation in high tension loop, owing to be subjected to the withstand voltage restriction of silicon-controlled device, bad always solution, its reliability is not very high, user's maintenance technique does not catch up with, and contain a large amount of high order harmonic components in the thyristor output voltage, can damage high-tension motor, also can produce harmonic pollution to electrical network, admittedly there is excessive risk, expensive and higher harmonics pollutes, and technical difficulty is big, a little less than the overload capacity, the problem that maintenance cost is high.Carrying out pressure regulation with liquid resistance, is in high tension loop, the series connection liquid resistance, adopt pole plate in liquid, to move, change the pole plate distance, and change the resistance of liquid, thereby the starting voltage of change motor, its effect still can, though cost is low, no-harmonic wave pollution, but be subjected to environment for use and temperature effect, at high and cold and northern area liquid easy freezing, and in liquid, feed high-tension electricity, dangerous big, because liquid is corrosive, pole plate and water tank easily are corroded, and liquid evaporates easily, so maintenance workload is big, the maintenance cost height, useful life is short, and consumes a large amount of active power simultaneously during starting, and energy consumption is big.With the excitation mode pressure regulation, be adopt three-phase alternating current winding and a DC excitation winding, regulate the magnetic saturation of AC Windings by the size of transfer excitation, reach the adjustable purpose of starting process.But owing to inject direct current, noise is big, and adjustable range is limited, and harmonic pollution is big, and loss is also big.
Summary of the invention
The object of the present invention is to provide a kind of safe and reliable, energy savings, no-harmonic wave pollution, flexibly starting high voltage motor method and device thereof simple to operate of starting.
This flexibly starting high voltage motor method provided by the invention is the adjustable inductor of the every phase power supply in two ends magnetic resistance all in parallel at high-tension motor operation mains switch, and the magnetic resistance adjusting employing of this inductor relatively moves inductor coil and inductor core and realizes.
The present invention also provides the flexibly starting high voltage motor device according to the method described above, it comprises high-tension motor operation mains switch, also comprise at least one driving mechanism and corresponding transmission mechanism that inductor coil, inductor core, drive inductor coil or inductor core relatively move them, all be parallel with described inductor coil at the every phase power supply input/output terminal that moves mains switch.
Driving mechanism in apparatus of the present invention can adopt motor operated driving mechanism or pneumatic drive mechanism or the driving mechanism that surges.
Apparatus of the present invention are driven by a driving mechanism towards equidirectional mobile inductor core or inductor coil.
Because the present invention is parallel with the adjustable inductor of magnetic resistance at the input/output terminal of the every phase power supply of high-tension motor operation mains switch; both described inductor was connected in the high-tension motor start loop; when magnetic resistance changes; reactance value changes; voltage divider principle according to series circuit; the starting voltage of high-tension motor is steadily changed, reach the soft start effect of motor, otherwise can reach motor soft stop effect.
The present invention has following advantage:
1, the present invention adopts and changes the position of inductor core in inductor coil, change the permeability of magnetizing mediums in the coil magnetic field, and change inductor coil inductance (impedance) value, this is a kind of progressive change of going down, can make high-tension motor smooth starting reliably, not have secondary pulse.
The sine wave that 2, can keep common frequency power network, no-harmonic wave pollution does not have any injury influence to motor yet.
3, be not subjected to the influence in environment for use and temperature and geographical position.
4, because by the inductance coil pressure regulation, no active power loss, thereby it is minimum to consume energy, so good energy-conserving effect.
5, simple in structure, to make easily, maintenance technology is understandable easy, and maintenance cost is low.
6, can make safe and reliable starting of high-tension motor or shutdown, long service life, overload capacity is strong, and is simple to operate.
Description of drawings:
Fig. 1 is an electrical schematic diagram of the present invention;
Fig. 2 is the structural representation of embodiment of the present invention one;
Fig. 3 is the cutaway view of Fig. 2 along the A-A line;
Fig. 4 is the structural representation of embodiment of the present invention two.
Embodiment
Flexibly starting high voltage motor method of the present invention is the adjustable inductor of the every phase power supply in two ends magnetic resistance all in parallel at high-tension motor operation mains switch, and the magnetic resistance adjusting employing of this inductor relatively moves inductor coil and inductor core and realizes.The device of Gou Jianing has a variety ofly in this way, below enumerates two kinds of typical embodiment:
Execution mode one: referring to Fig. 1-Fig. 3.
Present embodiment comprises high-tension motor operation mains switch 1, also comprise inductor coil 2, inductor core 3, driving mechanism 4, transmission mechanism 5, fixed support 6, track 7, for every phase power supply of high-tension motor operation, the input/output terminal of operation mains switch 1 all is parallel with described inductor coil 2 (see figure 1)s.Driving mechanism 4 can adopt all driving mechanisms of the prior art as can be seen from Figure 2, as motor-driven mechanism (motor-belt pulley or motor-gear etc.) or pneumatic drive mechanism (as cylinder-catch bar etc.) or the driving mechanism that surges (as hydraulic cylinder-catch bar etc.), 5 of transmission mechanisms adapt with driving mechanism.Driving mechanism 4 adopts motor-gear structure in the present embodiment, transmission mechanism 5 adopts the screw mandrel 51 and screw 52 that is meshed, each inductor coil 2 is installed on the fixed support 6, the afterbody of each inductor core 3 is connected as a single entity, screw 52 is fixed on described afterbody, screw mandrel 51 is installed on the fixed support 6 by bearing is rotating, track 7 is located in each inductor coil 2, also be fixed on the support 6, move along this track for each inductor core 3, the gear 42 of driving mechanism 4 is installed on the screw mandrel 51 and is driven by motor 41, screw mandrel 51 is by gear 42 driven rotary, thereby screw 52 is subjected to displacement, screw 52 mobile causes moving of inductor core 3, make inductor core 3 insert in the inductor coils 2 or from inductor coil 2, withdraw from, magnetic resistance is increased or reduce to reach the purpose that regulation voltage is finally realized the soft start of high-tension motor.
Execution mode two: referring to Fig. 4
The high-tension motor operation mains switch 1 that present embodiment is possessed except having execution mode one, inductor coil 2, inductor core 3, driving mechanism 4, transmission mechanism 5, fixed support 6, outside the track 7, also has bobbin 8, each inductor coil 2 is installed on the bobbin 8, the screw 52 of transmission mechanism 5 is located on the bobbin 8, screw mandrel 51 rotating being installed on the fixed support 6, inductor core 3 also is fixed on the fixed support 6, the motor 41 of driving mechanism 4 drives screw mandrel 51 by gear 42 and rotates, screw is moved on screw mandrel, thereby inductor coil 2 is moved, be inserted in or withdraw from inductor core 3.
During apparatus of the present invention work, connect the low-voltage control power of driving mechanism 4 earlier, make motor 41 drive transmission mechanism 5 inductor core 3 (or inductor coil 2) is moved to initial bit (even inductor core 3 all inserts in the inductor coil 2), coil inductance this moment (impedance) value is maximum, dividing potential drop about 70% (can design as required), starting current is between 0.4～0.9 times of motor rated current.The working power of closing then switch 9, inductance coil becomes the series connection start loop with high-tension motor, high-tension motor begins to rotate, and motor 41 drive transmission mechanisms 5 entrys into service this moment, inductor core 3 slowly withdraws from inductor coil 2, the inductance of inductor coil 2 (impedance) value slowly reduces, the high-tension motor starting voltage is steadily increased, when inductor core 3 moves on to the terminal point position when breaking away from inductor coil 2 fully, the inductance of inductor coil (impedance) value is minimum, divide to be pressed in below 5%, promptly the voltage that starts to work of high-tension motor can reach more than 95%.Can be according to the weight of motor institute driven equipment and the ability to bear of electrical network, the maximum starting current value of adjusting.Starting current is controlled at below the starting current maximum of adjusting, finishes up to starting, when electrical motors arrives rated speed, the operation mains switch 1 that closes, high-tension motor starts successfully, runs well 2 one-tenth bypasses of inductor coil.
Claims (6)
1, a kind of flexibly starting high voltage motor method, it is characterized in that the adjustable inductor of every phase power supply input/output terminal magnetic resistance all in parallel at described high-tension motor operation mains switch, the magnetic resistance adjusting employing of this inductor relatively moves inductor coil and inductor core and realizes.
2, a kind of flexibly starting high voltage motor device of making by the described method of claim 1, comprise high-tension motor operation mains switch (1), it is characterized in that also comprising inductor coil (2), inductor core (3), drive at least one driving mechanism (4) and corresponding transmission mechanism (5) that inductor core or inductor coil relatively move them, every phase power supply input/output terminal of described operation mains switch (1) all is parallel with described inductor coil (2).
3,, it is characterized in that described driving mechanism (4) adopts motor operated driving mechanism or pneumatic drive mechanism or the driving mechanism that surges according to the described flexibly starting high voltage motor device of claim 2.
4,, it is characterized in that driving by a driving mechanism towards equidirectional mobile inductor core (3) or inductor coil (2) according to claim 2 or 3 described flexibly starting high voltage motor devices.
5, according to the described flexibly starting high voltage motor device of claim 4, it is characterized in that described inductor coil (2) (6) on fixed support, transmission mechanism (5) adopts screw mandrel (51) and the screw (52) that is meshed, wherein screw mandrel (51) is installed in rotation on the fixed support (6), the afterbody of each inductor core (3) is connected as a single entity, screw (52) is located on the inductor core (3), be provided with the track (7) that power supply sensor magnetic core (3) moves in each inductor coil (2), drive inductor core (3) by driving mechanism (4) by screw mandrel (51) and move along described track.
6, according to the described flexibly starting high voltage motor device of claim 4, it is characterized in that described inductor core (3) is installed on the fixed support (6), transmission mechanism (5) adopts screw mandrel (51) and the screw (52) that is meshed, wherein screw mandrel (51) is installed in rotation on the fixed support (6), each inductor coil (2) is installed on the bobbin (8), screw (52) is located on the bobbin (8), drives inductor coil (2) by driving mechanism (4) by screw mandrel (51) and moves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100050819A CN101277084A (en) | 2007-03-26 | 2008-02-01 | Method and apparatus for flexibly starting high voltage motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710034625.X | 2007-03-26 | ||
| CN200710034625 | 2007-03-26 | ||
| CNA2008100050819A CN101277084A (en) | 2007-03-26 | 2008-02-01 | Method and apparatus for flexibly starting high voltage motor |
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| CN101277084A true CN101277084A (en) | 2008-10-01 |
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| CNA2008100050819A Pending CN101277084A (en) | 2007-03-26 | 2008-02-01 | Method and apparatus for flexibly starting high voltage motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499373B (en) * | 2008-11-10 | 2011-01-19 | 凌海科诚电力电器制造有限责任公司 | Magnetic adjustment method and magnetic adjustment device for air-core filter reactor |
| CN106024345A (en) * | 2016-07-05 | 2016-10-12 | 湖北第二师范学院 | Adjustable induction device, and wireless energy transmission system and control method thereof |
| CN111415807A (en) * | 2020-04-13 | 2020-07-14 | 湖南科太电气有限公司 | Iron core displacement rail device of high-voltage soft starter |
-
2008
- 2008-02-01 CN CNA2008100050819A patent/CN101277084A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499373B (en) * | 2008-11-10 | 2011-01-19 | 凌海科诚电力电器制造有限责任公司 | Magnetic adjustment method and magnetic adjustment device for air-core filter reactor |
| CN106024345A (en) * | 2016-07-05 | 2016-10-12 | 湖北第二师范学院 | Adjustable induction device, and wireless energy transmission system and control method thereof |
| CN111415807A (en) * | 2020-04-13 | 2020-07-14 | 湖南科太电气有限公司 | Iron core displacement rail device of high-voltage soft starter |
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