CN201140389Y - Frequency conversion electric tool - Google Patents
Frequency conversion electric tool Download PDFInfo
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- CN201140389Y CN201140389Y CNU2008200736814U CN200820073681U CN201140389Y CN 201140389 Y CN201140389 Y CN 201140389Y CN U2008200736814 U CNU2008200736814 U CN U2008200736814U CN 200820073681 U CN200820073681 U CN 200820073681U CN 201140389 Y CN201140389 Y CN 201140389Y
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Abstract
The utility model relates to a variable-frequency electric tool, comprising a shell, a handle and a motor with a stator and a rotor, which is characterized in that the shell is provided with an electric frequency conversion module and a control module connected in turn, which are connected a variable frequency motor. The variable-frequency electric tool has the advantages that the variable-frequency electric tool can save energy, protect environment, has safe and simple operation, has high efficiency, long service life, intelligent application, operation accident judgment intelligent protection, wide application, simple production and easy maintenance, the utility model adopts digit intelligent electric frequency conversion technique and variable frequency motor technique into the electric tool. The utility model overcomes the defects of the single phase series excitation electric tool, such as high idle speed, high noise, high start current, bad effect on other appliances on the power network, spark and carbon dust leakage causing pollution and the like. The utility model eliminates the exchange of the electric brush, bearing, switch and armature, having long service life.
Description
Technical field
The utility model belongs to electric tool, relates in particular to a kind of frequency conversion electric tool of using digital intelligent frequency-variable electronic technology and adjustable frequency motor.
Background technology
Present known electric tool mainly contains single-phase series excitation electric tool and three-phase asynchronous electric instrument, also has the intermediate frequency electric tool of three-phase 150HZ, 200HZ, 300HZ, four kinds of three-phase 42V of 400HZ intermediate frequency power supply in addition.The use of electric tool is mainly hand-held, then require to use power supply convenient, carries lightly, and power is big, safety, and single-phase series excitation electric tool has satisfied above-mentioned instructions for use basically, owing to use widely, therefore develops and is in great demand.Also there are many shortcomings in single-phase series excitation electric tool, and it is big to mainly contain unloaded noise, commutation spark is arranged, produce radio, TV interference, need often to change the brush of wearing and tearing, have a large amount of carbon dust dust to overflow, starting, stalling current is big, influence the use of other electrical equipment in the electrical network, bearing, switch, armature is fragile, influences service life.The high-power electric instrument is more fragile, and the life-span is shorter.The long service life of three-phase asynchronous electric instrument uses the power can be big, its shortcoming: it is little that volume is big, Heavy Weight, Unit Weight are exerted oneself, and can only be suitable for movable type, and the high-power electric instrument not too is fit to hand-held.Other four kinds of three-phase 150HZ, 200HZ, 300HZ, 400HZ intermediate frequency electric tool, operating voltage is 42V, safe in utilization, long working life, volume are little, in light weight, easy to use, its major defect: power supply is inconsistent on voltage, frequency and the electrical network of use working power, need to use special-purpose intermediate frequency power supply, a kind of frequency instrument needs a kind of frequency equipment, a kind of frequency instrument has only a kind of speed, therefore the scope of application is restricted, only be suitable for using on the special production line of a small amount of factory, and the intermediate frequency instrument costs an arm and a leg.Demand developing a kind of shortcoming that above-mentioned electric tool respectively has that solves in the industry urgently, again they separately advantage be integrated in one, and have energy-conservation, environmental protection, intelligent operation and kinds of protect function, safer, more convenient, more reliable, the electric tool of longer service life.
The utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned technology, and provide a kind of frequency conversion electric tool that has adopted advanced digital intelligent frequency-variable electronic technology and variable-frequency motor to integrally combine, it can use required watt level according to reality, automatic intelligently feedback signal, adjust the frequency-variable module output frequency, can be from the frequency of zero load setting, adjust in the required frequency range, make adjustable frequency motor output corresponding rotating speeds and power, reach the function of automatic adaptation load variations, both can satisfy the required power requirement of actual condition, reach purpose of energy saving again.
The utility model for achieving the above object, by the following technical solutions: a kind of frequency conversion electric tool, comprise casing, handle and have rotor and the motor of stator, it is characterized in that: described casing is built-in with the control module of frequency-variable electronic module and connection successively and is connected with variable-frequency motor.
Described frequency-variable module is made up of the rectification circuit, filter circuit and the inverter that connect successively.
Described control module comprises the control loop of connection successively and the holding circuit that overload protection, overtemperature protection, stall protection, leakage current protection, short-circuit protection, overvoltage protection and under-voltage protecting circuit are formed, and is connected with switch element.
Described switch element comprises digital display screen, button, indicator lamp and the switch that connects successively.
Described frequency-variable module adopts the DC frequency-changing module to be connected with the three phase variable frequency synchronous motor or adopts the AC frequency conversion module to be connected with the three phase variable frequency asynchronous machine.
Described variable-frequency motor rotor front end connects fan and transmission.
The transmission that described variable-frequency motor rotor front end connects adopts angle gear transmission, straight-tooth or angular gear transmission or belt transmission pair.
The utility model beneficial effect: frequency conversion electric tool can be widely used in a plurality of fields; it have unique energy-saving and environmental protection, safe in utilization, convenient, efficient is high, the life-span is long, intelligent operation, operation troubles judgement intelligent protection, wide adaptability; making advantages such as simple, easy to maintenance, is that digital intelligent frequency-variable electronic technology and adjustable frequency motor technology are applied in the electric tool.It overcomes single-phase series excitation electric tool, the no-load speed height, and noise is big, starting current is big, influences the use of other electrical equipment on the electrical network, and spark is arranged, radio, TV interference are arranged, the medium shortcoming that influences environmental protection of carbon dust dust effusion air is arranged, and the trouble of often changing the wearing and tearing brush, bearing, switch, armature are fragile, influence the service life of product, complex structure, manufacturing process is loaded down with trivial details, high-power electric instrument noise is bigger, the shortcoming that the life-span is shorter.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the circuit theory diagrams of AC frequency conversion;
Fig. 3 is the circuit theory diagrams of DC frequency-changing.
Among the figure: 1. gearbox, 2. middle cover, 3. fan, 4. rotor, 5. stator, 6. casing, 7. frequency-converter power module, 8. frequency-converter power module heat radiator 9. big switch 10. handles 11. cables, 12. bearings.
The specific embodiment
Describe the specific embodiment of the present utility model in detail below in conjunction with accompanying drawing and preferred embodiment.
As shown in the figure, a kind of frequency conversion electric tool comprises casing, handle and has rotor and the motor of stator, and described casing is built-in with the control module of frequency-variable electronic module and connection successively and is connected with variable-frequency motor.Described frequency-variable module is made up of the rectification circuit, filter circuit and the inverter that connect successively.Described control module comprises control loop and the holding circuit that connects successively, and is connected with switch element.Described switch element comprises digital display screen, button, indicator lamp and the switch that connects successively.Described variable-frequency motor rotor front end connects fan and transmission.The transmission that variable-frequency motor rotor front end connects adopts angle gear transmission, straight-tooth or angular gear transmission or belt transmission pair.Operation principle: see Fig. 1 for details, gearbox 1 is the motion that horizontally rotates adjustable frequency motor rotor 4, pays by the angle gear drive and slows down, and change over vertically and rotatablely move, and drives the sand milling sheet and carries out work.Adjustable frequency motor is made up of fan 3 rotors 4 and stator 5, fan 3 is installed in the front end of rotor 4, rotor 4 rotation drive fan 3 at a high speed rotates simultaneously, air inlet and gearbox 1 air outlet at handle 10, by gearbox 1 middle cover 2, casing 3 and handle 10 form cooling air duct, rotor 4 stators 5 frequency-converter power modules 7 frequency-converter power module heat radiators 8, all in the heat radiation cooling air duct, force to cool off.Casing 6 handles 10 are engineering plastics and make, and stator 5 is installed among the cabinet 6, between the armature spindle of rotor 4 and centre an insulation system are arranged, and form present embodiment, main double insulation structure.Frequency-converter power module 7 and frequency-converter power module heat radiator 8 are installed in air inlet position in the casing 6, and rotor 4 two ends are equipped with two bearings 12.Frequency-converter power module heat radiator 8 is made concave-shaped receptacle by aluminium alloy, and intensive radiating ribs is arranged around the container, sucks air by air inlet, takes away heat by radiating ribs, cools off.For shock resistance, against shock and thermal conductivity are preferably sealed with thermal conductive insulation glue at spill Aluminium Radiator and intermodule, form the power module assembly of band radiator, be installed in the air inlet position, because the adjustable frequency motor rotor banding fan, carry out the high speed rotation, make air inlet to air outlet, draw to become stronger heat radiation cooling air duct, power model and adjustable frequency motor obtain forcing cooling in this wind path, the quality of cooling condition directly influences the heat ageing degree and the working life of these parts.Big switch 9 is installed in the handle 10, is frequency conversion electric tool command centre, and it not only controls the frequency-converter power module, and plays the safety of protection whole system.Cable 11 is made up of cable and sheath, be installed in the afterbody of handle 11, power network current enters big switch 9 by cable 11, after the conducting, enter the control module in frequency-converter power module 7 and the big switch 9 simultaneously, carry out frequency conversion, through the frequency conversion after-current, the stator 5 of input adjustable frequency motor is rotated rotor 4.It uses the power supply on the electrical network, single-phase 50HZ (60HZ), three-phase 50HZ (60HZ), utilize digital intelligent frequency-variable electronic module, according to various different instruments, import different best effort characteristic curves, it can be according to frequency conversion electric tool required watt level in operation, and automatic intelligently feedback signal is adjusted the frequency-variable module output frequency, can be from the frequency of zero load setting, adjust in required frequency (generally about the 400HZ) scope, make adjustable frequency motor output corresponding rotating speeds and power, reach the function of automatic adaptation load variations, therefore both can satisfy the required power requirement of actual condition, reach purpose of energy saving again.In module, can add the kinds of protect circuit as required, as: overload protection, overtemperature protection, stall protection, leakage current protection, short-circuit protection, overvoltage protection, under-voltage protection etc.; show by indicator lamp; quit work, reach the automation defencive function that the running status fault is judged like this, pass through display screen simultaneously; show rotating speed; moment of torsion, functions such as positive and reverse return veer are used safer convenience; this not only operates safer to the user, instrument has also been played good protective action.
Triggering signal is adopted in starting, and contactless startup and positive decommuntation make switch only bear minimum milliampere electric current, and these all are arranged in the module.Because the zero-based soft start of starting current makes switch can not bear big starting current influence, has not only protected switch life, has more solved the electric tool Fraquent start, the influence that big electric current uses other electrical equipment in the electrical network.
See Fig. 2-3 for details, frequency conversion electric tool adopts brushless adjustable frequency motor, and the high-power frequency conversion electric tool adopts AC frequency conversion module and three phase variable frequency asynchronous motor, and the low power frequency conversion electric tool can adopt DC frequency-changing module and three phase variable frequency synchronous motor.Adjustable frequency motor does not have brush, has solved the trouble of changing brush, does not have spark, does not have radio, TV interference and carbon dust dust to overflow, and its rotor all is the solid of metal, does not have commutator and winding.Its working life greatly improves, and can stand at a high speed temperature and powerful requirement.
Digital intelligent frequency-variable electronic module can make electric network source become the 0-400HZ power supply from 50HZ (60HZ), make the rotating speed and the power with frequency of adjustable frequency motor increase and improve, can reach and surpass existing similar specification series-wound motor rated speed, rated power is also promoted simultaneously.
When design tool best effort characteristic curve, determined the minimum idle electric current, the frequency of idling speed has low energy consumption, the characteristics of low noise when making it unloaded, also solved bearing at supercritical speed, flimsy factor, the characteristic working curve maximum frequency point is the operating frequency peak, rated power just, specified rotating speed peak.When using more high-power and movable electric tool in factory and professional tool, can design and use three-phase 50HZ (60HZ) power supply, need increase by two rectification diodes in the rectifying part of power model, other parts all do not have influence.Frequency conversion electric tool, the specification watt level only influences the size of power model size and adjustable frequency motor, and the big switch element that control module is made, be similar substantially, this big switch also is the universal component of frequency-variable module, and control module does not have heater element, need not cool off, can place the place that is separated by with power model, as handle, back cover, positions such as casing outside.Prevent the heat effects control module that power model sends like this, also simplified the production and the manufacturing of various different capacity specification modules simultaneously.
No matter adjustable frequency motor is three phase variable frequency asynchronous motor or three phase variable frequency synchronous motor, its rotor is the metal solid all, do not have winding, do not have commutator, behind high-speed balancing, as long as improve frequency, can reach other motor the high speed that can't finish, do not influence its life-span again, be the rationally open rotating speed of adjustable frequency motor like this, improve Unit Weight and exert oneself, reliable assurance is provided.When design splashproof type and watertight type instrument, operating voltage can adopt 42V three class instrument forms.
The above only is preferred embodiment of the present utility model, is not structure of the present utility model is done any pro forma restriction.Every foundation technical spirit of the present utility model all still belongs in the scope of the technical solution of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (7)
1, a kind of frequency conversion electric tool comprises casing, handle and has rotor and the motor of stator, it is characterized in that: described casing is built-in with the control module of frequency-variable electronic module and connection successively and is connected with variable-frequency motor.
2, frequency conversion electric tool according to claim 1 is characterized in that: described frequency-variable module is made up of the rectification circuit, filter circuit and the inverter that connect successively.
3, frequency conversion electric tool according to claim 1; it is characterized in that: described control module comprises the control loop of connection successively and the holding circuit that overload protection, overtemperature protection, stall protection, leakage current protection, short-circuit protection, overvoltage protection and under-voltage protecting circuit are formed, and is connected with switch element.
4, frequency conversion electric tool according to claim 1 is characterized in that: described switch element comprises digital display screen, button, indicator lamp and the switch that connects successively.
5, frequency conversion electric tool according to claim 1 is characterized in that: described frequency-variable module adopts the DC frequency-changing module to be connected with the three phase variable frequency synchronous motor or adopts the AC frequency conversion module to be connected with the three phase variable frequency asynchronous machine.
6, frequency conversion electric tool according to claim 1 is characterized in that: described variable-frequency motor rotor front end connects fan and transmission.
7, frequency conversion electric tool according to claim 6 is characterized in that: the transmission that described variable-frequency motor rotor front end connects adopts angle gear transmission, straight-tooth or angular gear transmission or belt transmission pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200736814U CN201140389Y (en) | 2008-01-18 | 2008-01-18 | Frequency conversion electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200736814U CN201140389Y (en) | 2008-01-18 | 2008-01-18 | Frequency conversion electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201140389Y true CN201140389Y (en) | 2008-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200736814U Expired - Lifetime CN201140389Y (en) | 2008-01-18 | 2008-01-18 | Frequency conversion electric tool |
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| CN (1) | CN201140389Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103153535A (en) * | 2010-10-19 | 2013-06-12 | 罗伯特·博世有限公司 | Working tool, in particular electric tool |
| CN108857753A (en) * | 2018-07-19 | 2018-11-23 | 苏州泰富金电子科技有限公司 | A kind of geological prospecting rock sample device for cleaning and grinding |
| WO2021000940A1 (en) * | 2019-07-04 | 2021-01-07 | 苏州宝时得电动工具有限公司 | Handheld tool |
-
2008
- 2008-01-18 CN CNU2008200736814U patent/CN201140389Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103153535A (en) * | 2010-10-19 | 2013-06-12 | 罗伯特·博世有限公司 | Working tool, in particular electric tool |
| CN103153535B (en) * | 2010-10-19 | 2016-08-10 | 罗伯特·博世有限公司 | Work tool, especially electric tool |
| CN108857753A (en) * | 2018-07-19 | 2018-11-23 | 苏州泰富金电子科技有限公司 | A kind of geological prospecting rock sample device for cleaning and grinding |
| WO2021000940A1 (en) * | 2019-07-04 | 2021-01-07 | 苏州宝时得电动工具有限公司 | Handheld tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081029 |