CN109599995A - A kind of New-type asynchronous multi-source adjustable frequency motor - Google Patents
A kind of New-type asynchronous multi-source adjustable frequency motor Download PDFInfo
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- CN109599995A CN109599995A CN201811621634.3A CN201811621634A CN109599995A CN 109599995 A CN109599995 A CN 109599995A CN 201811621634 A CN201811621634 A CN 201811621634A CN 109599995 A CN109599995 A CN 109599995A
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- motor
- frequency converter
- frequency
- adjustable frequency
- adjustable
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
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- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Multiple Motors (AREA)
Abstract
The present invention provides a kind of New-type asynchronous multi-source adjustable frequency motors, including adjustable frequency motor, terminal box and frequency converter, conductor in each circle of adjustable frequency motor interior loop is divided at least two strands, it is connected in individual terminal box after corresponding per share conductor wiring, each terminal box is electrically connected a frequency converter, and frequency converter is connect with power supply.Adjustable frequency motor is large capacity motor, and frequency converter is low capacity frequency converter.Frequency converter quantity at least two.At least one frequency converter is adjustable frequency motor power supply.The Novel variable-frequency motor of two or more inverter supplies is invented, compared with traditional frequency conversion method for controlling speed regulation, it is high that more inverter supply methods include motor, frequency converter utilization rate, operational reliability is high, frequency converter requires low, the advantages that transformation is convenient, and improvement cost is low, and maintenance is simple.
Description
Technical field
The invention belongs to driving equipment technical fields, in particular to a kind of New-type asynchronous multi-source adjustable frequency motor.
Background technique
With the rapid development of power electronic technique and semiconductor device, ac speed control technology obtains continuous perfect
And raising, the frequency converter of gradual perfection are obtained extensively with its good output waveform, the excellent ratio of performance to price on alternating current generator
General application.Such as: high capacity motor and medium and small electric motor for rolling way, elevator motor, container hoisting of the steel mill for steel rolling are set
Spare bridge motor, water pump and electric machine for fan, compressor, Household Appliance machine etc. are all sequentially with ac variable frequency speed regulation electricity
Machine, and achieve good result.Have the significant advantage that speed regulation is held than DC speed-regulating motor using ac variable frequency speed regulation motor
Easily, and it is energy saving, high revolving speed operation may be implemented, soft start and fast braking etc. may be implemented.
The revolving speed of asynchronous motor is proportional to frequency, it is seen that the revolving speed of asynchronous motor can be changed by changing supply frequency.
In frequency control, always wish that main flux remains unchanged.If main flux be greater than operate normally when magnetic flux, magnetic circuit supersaturation and
Increase exciting current, power factor reduces；If main flux is less than magnetic flux when operating normally, motor torque decline.
However, traditional adjustable frequency motor control mode is to control motor by a frequency converter, we are with most often
Blower, pump-type load citing, when motor speed is reduced to the half of rated speed, bearing power then drops to volume
Determine the 1/8 of power, the available maximum power of motor is close to rated power half at this time, it can be seen that at this time motor and
The utilization rate of frequency converter is very low.
Therefore, above-mentioned technological deficiency exists in the prior art, is those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
The main purpose of the present invention is to provide a kind of New-type asynchronous multi-source adjustable frequency motors, for traditional frequency conversion motor
Deficiency, invented the Novel variable-frequency motor of two or more inverter supplies, compared with traditional frequency conversion method for controlling speed regulation,
More inverter supply methods include motor, frequency converter utilization rate height, and operational reliability is high, and frequency converter requires low, transformation side
Just, the advantages that improvement cost is low, and maintenance is simple.
To achieve the goals above, the present invention provides a kind of New-type asynchronous multi-source adjustable frequency motors, including variable-frequency electric
Machine, terminal box and frequency converter, the conductor in each circle of adjustable frequency motor interior loop are divided at least two strands, corresponding per share
It is connected in individual terminal box after the conductor wiring, each described terminal box is electrically connected a frequency converter, the frequency conversion
Device is connect with power supply.
Further, the adjustable frequency motor is large capacity motor, and the frequency converter is low capacity frequency converter.
Further, described frequency converter quantity at least two.
Further, at least one described frequency converter is adjustable frequency motor power supply.
It applies the technical scheme of the present invention, by the way that the conductor in the every circle of adjustable frequency motor coil is divided into two strands or multiply,
Then it will be connected in individual power supply case after the per share conductor wiring of correspondence, pass through the change of two or more same voltages, same-phase
Frequency device is powered motor, and one motor speed adjusting of more Frequency Converter Controls may be implemented, so that separate unit change be effectively reduced
The capacity of frequency device can according to need in load reduction simultaneously and reduce the quantity of power supply frequency converter, occur in separate unit frequency converter
Load can also be suitably reduced when failure to continue to run to improve system reliability of operation.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is prior art YKK400-4 560kW/6kV motor wiring schematic diagram；
Fig. 2 is YE3 400-4 560kW/400V motor wiring schematic diagram after improving.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It is noted that described further below be all exemplary, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
In this embodiment, Fig. 1 is that the single large-capacity transducer of the prior art controls connecing for large capacity motor
Line schematic diagram loads specifically, existing YKK400-4 560kW/6kV high-tension motor needs to carry out reducing energy consumption as wind
Machine, water pump, traditional reforming mode are that motor is directly changed to adjustable frequency motor, and motor is supplied by high-voltage frequency converter
Electricity, motor wiring schematic diagram are shown in Fig. 1, and motor corresponding performance parameter in 50Hz and 25Hz is shown in Table 1.
Table 1
| Voltage (V) | Frequency (Hz) | Output power (kW) | Efficiency (η) |
| 6000 | 50 | 560 | 95.3% |
| 3000 | 25 | 70 | 94.1% |
By upper table 1 it is found that traditional adjustable frequency motor control mode is to control motor by a frequency converter, with
In the case that blower, water pump class are load, when motor speed is reduced to the half of rated speed (i.e. frequency is reduced to half),
Bearing power then drops to the 1/8 of rated power, and the available maximum power of motor is close to rated power half at this time, can be with
Find out, the utilization rate of motor and frequency converter is very low at this time.
In order to reduce the operating voltage of motor, and the service efficiency of motor and frequency converter is improved, to electric in the prior art
The quantity of winding mode and frequency converter in motivation improves, specific as follows:
The present invention provides a kind of New-type asynchronous multi-source adjustable frequency motor, including adjustable frequency motor, terminal box and frequency converter,
Conductor in each circle of adjustable frequency motor interior loop is divided at least two strands, connects after the corresponding per share conductor wiring
Into individual terminal box, each described terminal box is electrically connected a frequency converter, and the frequency converter is connect with power supply.It is logical
Such setting method is crossed, one motor speed adjusting of more Frequency Converter Controls may be implemented, so that separate unit frequency converter be effectively reduced
Capacity.Further, the adjustable frequency motor is large capacity motor, and the frequency converter is low capacity frequency converter.
Further, described frequency converter quantity at least two.At least one described frequency converter is adjustable frequency motor confession
Electricity.Therefore, it reduces the quantity of power supply frequency converter in use, can according to need in load reduction, go out in separate unit frequency converter
Load can also be suitably reduced when existing failure to continue to run to improve system reliability of operation.
Reducing energy consumption such as is carried out to YKK400-4 560kW/6kV motor according to the technology of the present invention, motor is changed to YE3
400-4560kW/400V is powered motor using two low voltage frequency converters, and two transducer powers are respectively 315kW
And 250kW.
YE3 400-4 560kW motor basic parameter: voltage rating 400V, rated frequency 50Hz, coil turn 3, often
Line gauge in circle conductor is 20 × φ 1.5+18 × φ 1.4, pitch 1-16, number of stator slots 72, number 4.Motor wiring
Schematic diagram is shown in Fig. 2, and motor corresponding performance parameter in 50Hz and 25Hz is shown in Table 2.
Table 2
| Voltage (V) | Frequency (Hz) | Output power (kW) | Efficiency (η) | Remarks |
| 400 | 50 | 560 | 96.2% | Two inverter supplies |
| 200 | 25 | 70 | 94.5% | Two inverter supplies |
| 200 | 25 | 70 | 94.1% | 315kW inverter supply |
| 200 | 25 | 70 | 93.9% | 250kW inverter supply |
Referring to Fig. 2 and table 2, this New-type asynchronous multi-source adjustable frequency motor is independent by 20 × φ of conductor 1.5 in every circle coil
Wiring is connected in individual terminal box, external 315kW frequency converter；18 × φ of conductor 1.4 in every circle coil is individually connect
Line is connected in individual terminal box, external 250kW frequency converter, when motor is when 25-40Hz revolving speed is run, it is only necessary to open
Lead to and connect the 315kW frequency converter of 20 × φ, 1.5 terminal box and can meet motor running requirement, when motor is in 5-25Hz revolving speed
When operation, it is only necessary to which the 250kW frequency converter for opening 18 × φ of connection, 1.4 terminal box can meet motor running requirement.
For different model, power, operating condition motor, frequency converter quantity can be chosen as the case may be, and design
Different control strategies.
By Tables 1 and 2 comparison it can be found that when motor is run at declared working condition 50Hz, after traditional reducing energy consumption
Motor efficiency is 95.3%, and motor efficiency is 96.2% after carrying out reducing energy consumption according to the technology of the present invention.Work as motor
When running under 25Hz operating condition, the two efficiency is suitable, but the present invention only needs two low pressure low capacity frequency converters can be realized
Reducing energy consumption, compared with high-voltage frequency converter cost needed for traditional reducing energy consumption, cost will be reduced greatly, and in separate unit frequency conversion
In the case that device controls, it can also reach higher service efficiency.
The improved New-type asynchronous multi-source frequency control motor of the present invention, it is big to realize more low capacity Frequency Converter Control separate units
Capacity electric machine, large capacity high-tension motor could alternatively be large-size low voltage motor, large capacity high-voltage frequency converter can use
More set low pressure low capacity frequency converters replace.To improve frequency converter reliability, frequency inverter capacity is reduced, high voltage variable is overcome
Frequency device takes up a large area, safeguard using it is complicated the disadvantages of, the present invention has easy to use, and cost of investment is low, and maintenance is simple
The advantages that.
Implementation of the invention reduces the technical requirements to frequency converter, especially large-capacity transducer, and producer is needed to carry out
The disadvantages of special designing, there are the design cycle is long, the time of delivery is long, purchase cost is high, maintenance is at high cost.According to the present invention
Motor is transformed, conventional multiple low capacity frequency converters may be implemented and replace single large-capacity transducer, multi-frequency converter control
Motor processed can effectively reduce equipment fault risk, when frequency converter breaks down, can start other frequency converters in low-power, low
It is run under revolving speed, equipment is avoided directly to shut down, equipment fault is effectively reduced and is lost to manufacturer's bring.
In conclusion be merely preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of New-type asynchronous multi-source adjustable frequency motor, it is characterised in that: including adjustable frequency motor, terminal box and frequency converter, institute
It states the conductor in each circle of adjustable frequency motor interior loop and is divided at least two strands, be connected to after the corresponding per share conductor wiring
In individual terminal box, each described terminal box is electrically connected a frequency converter, and the frequency converter is connect with power supply.
2. New-type asynchronous multi-source adjustable frequency motor as described in claim 1, it is characterised in that: the adjustable frequency motor is great Rong
Motor is measured, the frequency converter is low capacity frequency converter.
3. New-type asynchronous multi-source adjustable frequency motor as claimed in claim 2, it is characterised in that: the frequency converter quantity at least 2
It is a.
4. New-type asynchronous multi-source adjustable frequency motor as claimed in claim 3, it is characterised in that: at least one described frequency converter is
The adjustable frequency motor power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621634.3A CN109599995B (en) | 2018-12-28 | 2018-12-28 | Novel asynchronous multisource variable frequency motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621634.3A CN109599995B (en) | 2018-12-28 | 2018-12-28 | Novel asynchronous multisource variable frequency motor |
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| CN109599995A true CN109599995A (en) | 2019-04-09 |
| CN109599995B CN109599995B (en) | 2020-09-11 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101946399A (en) * | 2008-01-18 | 2011-01-12 | 芒努斯·林德马克·利利斯特罗勒 | Electric motor |
| CN201726231U (en) * | 2010-07-21 | 2011-01-26 | 余成东 | Junction box and variable speed, variable frequency motor with junction box |
| CN201830192U (en) * | 2010-10-30 | 2011-05-11 | 山东泰鼎矿山机械有限公司 | Mine hoist control system driven by permanent magnet motor |
| CN102355043A (en) * | 2011-10-24 | 2012-02-15 | 北京国电四维清洁能源技术有限公司 | Multiple variable-frequency power supply combined power device with redundancy design |
| CN106655648A (en) * | 2016-11-30 | 2017-05-10 | 华中科技大学 | Modular motor system and driving control method therefor |
-
2018
- 2018-12-28 CN CN201811621634.3A patent/CN109599995B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101946399A (en) * | 2008-01-18 | 2011-01-12 | 芒努斯·林德马克·利利斯特罗勒 | Electric motor |
| CN201726231U (en) * | 2010-07-21 | 2011-01-26 | 余成东 | Junction box and variable speed, variable frequency motor with junction box |
| CN201830192U (en) * | 2010-10-30 | 2011-05-11 | 山东泰鼎矿山机械有限公司 | Mine hoist control system driven by permanent magnet motor |
| CN102355043A (en) * | 2011-10-24 | 2012-02-15 | 北京国电四维清洁能源技术有限公司 | Multiple variable-frequency power supply combined power device with redundancy design |
| CN106655648A (en) * | 2016-11-30 | 2017-05-10 | 华中科技大学 | Modular motor system and driving control method therefor |
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| Publication number | Publication date |
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| CN109599995B (en) | 2020-09-11 |
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