CN103023404A - Coder-free permanent-magnet motor drive system - Google Patents
Coder-free permanent-magnet motor drive system Download PDFInfo
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- CN103023404A CN103023404A CN2011102872487A CN201110287248A CN103023404A CN 103023404 A CN103023404 A CN 103023404A CN 2011102872487 A CN2011102872487 A CN 2011102872487A CN 201110287248 A CN201110287248 A CN 201110287248A CN 103023404 A CN103023404 A CN 103023404A
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Abstract
The invention relates to the technical field of motors, and in particular relates to a permanent-magnet motor. A coder-free permanent-magnet motor drive system comprises a permanent-magnet motor main body, wherein the permanent-magnet motor main body comprises a rotor, and a stator outside the rotor, and also comprises a control system, wherein the control system is connected with a frequency converter, the frequency converter is connected with the input end of the permanent-magnet motor, when the permanent-magnet motor main body is started, the control system controls the frequency converter to output a continuous current to the permanent-magnet motor main body, and the stator produces a magnetic field to drive the rotor to rotate. When the rotor stops rotating, the rotor is in a proper rotating angle, the control system controls the frequency converter according to a normally starting mode to start the permanent-magnet motor main body. Due to the adoption of the technical scheme, the coder-free permanent-magnet motor drive system has the advantages of simple structure, low cost and easiness in starting.
Description
Technical field
The present invention relates to technical field of motors, be specifically related to a kind of drive system of magneto.
Background technology
Magneto comprises rotor and stator.Be placed with a large amount of magnetic links on the rotor, stator is provided with magnet exciting coil.The magnetic force that magnet exciting coil produces and the magnetic force of magnetic links itself produce active force, and then realize the rotation of rotor.Magneto has that volume is little, at the bottom of the energy consumption, the characteristics such as simple in structure, failure rate is low.At aspect of performance, can realize direct current machine, the performance of synchronous machine, asynchronous machine, stepping motor can be replaced above-mentioned various motors.By foregoing as seen, magneto is with respect to existing direct current machine, and the motors such as synchronous machine, asynchronous machine, stepping motor have clear superiority.
Existing magneto is when starting, want detection rotor position signalling signal, then by behind the control system seizure signal, rotor is forwarded to the dead-center position of back electromotive force with mode manually or automatically, then the relative position of driver memory coding device between stator just can make motor start smoothly.In the prior art, usually adopt encoder as the monitoring equipment of rotor polarity position.So encoder must be band phase signal output (UVW).And the current encoder device is of a great variety, and the unstable volume of domestic quality is large.The price of import is more expensive.And wiring bothers easy wrong when using, even drive corruption, and relatively poor at a lot of environment, produces very large problem when needing Long-distance Control.
Summary of the invention
The object of the invention is to, a kind of encoderless driving system of permanent magnet motor is provided, solve above technical problem.
Technical problem solved by the invention can realize by the following technical solutions:
The encoderless driving system of permanent magnet motor, comprise a magneto main body, described magneto main body comprises a rotor, the outer stator of described rotor, also comprise a control system, described control system connects a frequency converter, and described frequency converter connects the input of described magneto, when described magneto main body starts, described control system is controlled described frequency converter and is exported a continuous current to described magneto main body, and described laundry produces magnetic field, drives described rotor and rotates;
When described rotor stops operating, think that described rotor is in suitable rotational angle, described control system is controlled described frequency converter according to the mode of normal startup, starts described magneto main body.
Be provided with a timing module in the described control system, described control system through a setting-up time after, think that described rotor stops operating, rotor is in suitable rotational angle, described control system is controlled described frequency converter according to the mode of normal startup, starts described magneto main body.
Magneto main body of the present invention, when starting, adopt the mode of frequency converter output fixed current to determine the rotational angle of rotor, carry out really phasing ratio of rotational angle with the mode that traditional employing encoder detects, the present invention is simple in structure, with low cost, start easily.
Described setting-up time is not more than 10 seconds, preferred 3 seconds.In order to can in time allow the magneto main body enter starting state.
The tachymeter that also comprises a detection rotor rotation situation, the signal output part of described tachymeter connects described control system; The rotating speed of described tachymeter detection rotor, and send rotary speed information to described control system; When the rotary speed information of receiving when described control system is zero, think that described rotor stops operating, rotor is in suitable rotational angle, described control system is controlled described frequency converter according to the mode of normal startup, starts described magneto main body.The mode that adopts the tachymeter detection rotor whether to stop operating can be judged the time that rotor stops operating more accurately, in time allows the magneto main body enter starting state.
Described tachymeter provides feedback for described control system, so that described control system is adjusted electric energy output situation in good time.
Be provided with an output current monitoring device in the described frequency converter, the signal output part of described output current monitoring device connects described control system, when described control system detects electric current and no longer changes by described output current monitoring device, think that described rotor stops operating in a setting-up time.Excursion is namely thought no longer to change during less than a set point.When the stator internal rotor stopped operating, internal magnetic field was stable, the electromagnetic interference that no longer stator coil is changed, therefore in the situation that the output of described frequency converter voltage is constant, current stabilization, changes very little, even no longer variation.
Described continuous current is 1/50～1/5 of rated current.
Beneficial effect: owing to adopting technique scheme, the present invention is simple in structure, with low cost, startup is easy.
Description of drawings
Fig. 1 is that the present invention starts front rotor initial random position schematic diagram;
Fig. 2 is the schematic diagram when rotor stops behind the logical continuous current of the present invention;
Fig. 3 is the structural representation that the present invention arranges tachymeter.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, further set forth the present invention below in conjunction with concrete diagram.
With reference to Fig. 1, Fig. 2, Fig. 3, the encoderless driving system of permanent magnet motor, comprise a magneto main body 1, magneto main body 1 comprises the stator 12 outside a rotor 11, the rotor 11, also comprises a control system, and control system connects a frequency converter, frequency converter connects the input of magneto, when magneto main body 1 started, control system control frequency converter was exported a continuous current to magneto main body 1, and continuous current is 1/50～1/5 of rated current.It is the S utmost point or the N utmost point that continuous current can allow the stator coil at stator 12 places keep magnetic pole, and this moment, stator 12 places produced magnetic field, under two like magnetic poles repel each other, the principle that there is a natural attraction between the sexes, drives rotor 11 and rotates.Control system is provided with the program storage module for the storage start-up routine.The program storage module stores the process procedures that starts magneto main body 1.When rotor 11 stopped operating, control system thought that rotor 11 is in predetermined rotational angle, and control system is in the Starting mode of predetermined rotational angle according to rotor 11, and the normal mode that starts is controlled frequency converter, starts magneto main body 1.
Be provided with a module regularly in the control system, control system through a setting-up time after, think that rotor 11 stops operating, rotor is in suitable rotational angle, control system is controlled frequency converter according to the mode of normal startup, starts magneto main body 1.Magneto main body 1 of the present invention when starting, adopts the mode of frequency converter output fixed current to determine rotational angle, carries out really phasing ratio of rotational angle with the mode that traditional employing encoder detects, and the present invention is simple in structure, with low cost, start easily.Setting-up time is not more than 10 seconds, preferred 3 seconds.In order to can in time allow magneto main body 1 enter starting state.
With reference to Fig. 1, when frequency converter is not also given magneto main body 1 input continuous current, the position view of stator and rotor.With reference to Fig. 2, behind magneto main body 1 logical continuous current, rotor rotates, and rotor stops at suitable rotational angle position at last.
With reference to Fig. 3, also comprise the tachymeter 2 of a detection rotor 11 rotation situation, the signal output part connection control system of tachymeter 2.The rotating speed of tachymeter 2 detection rotors 11, and send rotary speed information to control system.When the rotary speed information of receiving when control system is zero, think that rotor 11 stops operating, rotor is in suitable rotational angle, control system is controlled frequency converter according to the mode of normal startup, starts magneto main body 1.The mode that adopts tachymeter 2 detection rotors 11 whether to stop operating can be judged the time that rotor stops operating more accurately, in time allows magneto main body 1 enter starting state.Tachymeter provides feedback for control system, so that control system is adjusted electric energy output situation in good time.
Be provided with an output current monitoring device in the frequency converter, when the signal output part connection control system of output current monitoring device, control system detect electric current and no longer change by output current monitoring device, think that rotor 11 stops operating in a setting-up time.Excursion is namely thought no longer to change during less than a set point.When stator 12 internal rotors 11 stopped operating, internal magnetic field was stable, the electromagnetic interference that no longer stator coil is changed, therefore in the situation that frequency converter voltage output is constant, current stabilization, changes very little, even no longer variation.
Execution mode one, a kind of setting up procedure of magneto main body 1 of the present invention is as follows:
1) control system control frequency converter output continuous current is to magneto main body 1.
2) when control system after 5 seconds, the control frequency converter gives the magneto main body 1 power supply according to normal starting current, magneto main body 1 normally starts.
Execution mode two, the another kind of setting up procedure of magneto main body 1 of the present invention is as follows:
1) control system control frequency converter output continuous current is to magneto main body 1.
2) control system receives the rotary speed information that tachymeter 2 sends in real time.
When the rotary speed information of 3) receiving when control system was zero, control system control frequency converter gave the magneto main body 1 power supply according to normal starting current, and magneto main body 1 normally starts.
Execution mode three, the another kind of setting up procedure of magneto main body 1 of the present invention is as follows:
1) control system control frequency converter output continuous current is to magneto main body 1.
2) control system receives the current information that output current monitoring device transmits in real time.
3) when current information that control system is received no longer changes in a setting-up time, control system control frequency converter gives the magneto main body 1 power supply according to normal starting current, and magneto main body 1 normally starts.
Above demonstration and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
1. encoderless driving system of permanent magnet motor, comprise a magneto main body, described magneto main body comprises a rotor, the outer stator of described rotor, also comprise a control system, described control system connects a frequency converter, described frequency converter connects the input of described magneto, it is characterized in that, when described magneto main body starts, described control system is controlled described frequency converter and is exported a continuous current to described magneto main body, described laundry produces magnetic field, drives described rotor and rotates;
When described rotor stopped operating, described control system thought that described rotor is in suitable rotational angle, and described control system is controlled described frequency converter according to the mode of normal startup, starts described magneto main body.
2. encoderless driving system of permanent magnet motor according to claim 1, it is characterized in that: be provided with a timing module in the described control system, described control system through a setting-up time after, think that described rotor stops operating, rotor is in suitable rotational angle, described control system is controlled described frequency converter according to the mode of normal startup, starts described magneto main body.
3. encoderless driving system of permanent magnet motor according to claim 2, it is characterized in that: described setting-up time is not more than 10 seconds.
4. encoderless driving system of permanent magnet motor according to claim 3, it is characterized in that: described setting-up time is 3 seconds.
5. encoderless driving system of permanent magnet motor according to claim 1, it is characterized in that: also comprise the tachymeter of a detection rotor rotation situation, the signal output part of described tachymeter connects described control system; The rotating speed of described tachymeter detection rotor, and send rotary speed information to described control system;
When the rotary speed information of receiving when described control system is zero, think that described rotor stops operating, rotor is in suitable rotational angle, described control system is controlled described frequency converter according to the mode of normal startup, starts described magneto main body.
6. encoderless driving system of permanent magnet motor according to claim 1, it is characterized in that: be provided with an output current monitoring device in the described frequency converter, the signal output part of described output current monitoring device connects described control system, when described control system detects electric current and no longer changes by described output current monitoring device, think that described rotor stops operating in a setting-up time.
7. the described encoderless driving system of permanent magnet motor of any one in 6 according to claim 1, it is characterized in that: described continuous current is 1/50～1/5 of rated current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011102872487A CN103023404A (en) | 2011-09-26 | 2011-09-26 | Coder-free permanent-magnet motor drive system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102872487A CN103023404A (en) | 2011-09-26 | 2011-09-26 | Coder-free permanent-magnet motor drive system |
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| CN103023404A true CN103023404A (en) | 2013-04-03 |
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| CN2011102872487A Pending CN103023404A (en) | 2011-09-26 | 2011-09-26 | Coder-free permanent-magnet motor drive system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998166A (en) * | 2017-05-13 | 2017-08-01 | 上海建东科技有限公司 | The soft-start method and control device of a kind of permagnetic synchronous motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1148168A (en) * | 1996-08-08 | 1997-04-23 | 中国科学院电工研究所 | Method and device for testing original position of electric motor's rotator for ac servo system |
| CN101594114A (en) * | 2009-07-02 | 2009-12-02 | 哈尔滨工业大学 | Method for determining initial position angle of rotor of permanent magnet synchronous motor |
| CN101917152A (en) * | 2010-07-29 | 2010-12-15 | 宁波奥克斯空调有限公司 | Starting method of permanent-magnet synchronous compressor for variable-frequency air conditioner |
| US20110101900A1 (en) * | 2008-07-01 | 2011-05-05 | Schneider Toshiba Inverter Europe Sas | Method for determining the inductances of a permanent magnet synchronous machine |
| US20110148334A1 (en) * | 2009-12-18 | 2011-06-23 | Abb Oy | Method and arrangement for controlling permanent magnet synchronous machines |
-
2011
- 2011-09-26 CN CN2011102872487A patent/CN103023404A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1148168A (en) * | 1996-08-08 | 1997-04-23 | 中国科学院电工研究所 | Method and device for testing original position of electric motor's rotator for ac servo system |
| US20110101900A1 (en) * | 2008-07-01 | 2011-05-05 | Schneider Toshiba Inverter Europe Sas | Method for determining the inductances of a permanent magnet synchronous machine |
| CN101594114A (en) * | 2009-07-02 | 2009-12-02 | 哈尔滨工业大学 | Method for determining initial position angle of rotor of permanent magnet synchronous motor |
| US20110148334A1 (en) * | 2009-12-18 | 2011-06-23 | Abb Oy | Method and arrangement for controlling permanent magnet synchronous machines |
| CN101917152A (en) * | 2010-07-29 | 2010-12-15 | 宁波奥克斯空调有限公司 | Starting method of permanent-magnet synchronous compressor for variable-frequency air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998166A (en) * | 2017-05-13 | 2017-08-01 | 上海建东科技有限公司 | The soft-start method and control device of a kind of permagnetic synchronous motor |
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Owner name: SHANGHAI FENGFEI ELECTRIC CO., LTD. Free format text: FORMER OWNER: SUN PINGFEI Effective date: 20141013 |
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Free format text: CORRECT: ADDRESS; FROM: 201400 FENGXIAN, SHANGHAI TO: 201406 FENGXIAN, SHANGHAI |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20141013 Address after: 201406 room 7, building 558, light money road, 222, Shanghai, Fengxian District Applicant after: Shanghai flying Electric Co., Ltd. Address before: 201400, Feng 324, second management area, Fengxian District chemical industry zone, Shanghai, China Applicant before: Sun Pingfei |
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Application publication date: 20130403 |