CN101414745B - Motor protection device and method - Google Patents
Motor protection device and method Download PDFInfo
- Publication number
- CN101414745B CN101414745B CN2007101514661A CN200710151466A CN101414745B CN 101414745 B CN101414745 B CN 101414745B CN 2007101514661 A CN2007101514661 A CN 2007101514661A CN 200710151466 A CN200710151466 A CN 200710151466A CN 101414745 B CN101414745 B CN 101414745B
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- motor
- detection signal
- signal
- change type
- described motor
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- Control Of Electric Motors In General (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
The present invention discloses a motor protection device and a method which are applicable to a motor. The motor protection device consists of a detection unit for detecting motor operation state and the outputting a detection signal, a datum unit for producing a variable datum signal, a distinguishing unit for comparing the detection signal and the variable datum signal and distinguishing whether the motor is abnormal or not, and a protection unit for obtaining the result of the distinguishing unit and limiting the motor drive current when the motor is abnormal. The present invention is characterized in that the datum unit adjusts the variable datum signal according to a rotation detection signal (R.D.signal,Rotation Detection signal) of the motor so as to distinguish whether the motor is abnormal or not by synchronizing the motor rotation detection signal and the detection signal, thus achieving the dual-guarantee effect of the motor when the motor is abnormal.
Description
Technical field
What the present invention relates to is a kind of motor protection device and method thereof, refer to especially a kind of motor be subjected to external force restriction and occur turning round unusual the time, the motor protection device and the method thereof of restriction motor drive current.
Background technology
See also shown in Figure 1, Fig. 1 is the waveform schematic diagram of prior art motor drive current and revolution detection signal, in the existing motor drive circuit, for preventing that motor is blocked by extraneous foreign matter restriction or rotor and the unusual of (being commonly called as Lock) that can't turn round occur, at this moment, because motor can't normal operation can cause electric current to continue situation about rising, when electric current rises to the maximum constraints current value that current-limiting circuit (Current Limit) sets, then be subjected to the current-limiting circuit restriction and maintain the maximum constraints current value, then, again by revolution detection signal (R.D.signal, Rotation Detection signal) learn that motor can't turn round after, damage because of overheated to prevent the motor Inside coil by motor driven electric power, and recover output motor driven electric power over time more at interval, with unusually whether removing that the test motor can't turn round.
Yet, recovering at interval in the motor driven electric power of output, owing to drive current is subjected to the big electric current that maximum constraints current value that current-limiting circuit (Current Limit) sets maintains the motor initial start, so the motor driven electric power in output at interval will be because of big electric current excessive accumulation heat in the motor Inside coil, cause motor Inside coil temperature to rise continuously and healthily, and have the secret worry of hazard events such as high temperature damage; In addition,, may not necessarily satisfy masses the unusual requirements of support are appearred in motor, so how to improve the general objective that motor the problems referred to above have made great efforts to overcome for relevant dealer only by the discriminant approach of motor circuit for detecting.
Summary of the invention
Main purpose of the present invention, be when motor be subjected to external force restriction and occur turning round unusual the time, the restriction motor drive current is to prevent the motor damage.
Another object of the present invention is to learn by revolution detection signal and detection signal whether motor occurs unusually simultaneously, and then reaches the effectiveness that double shield appears described motor being carried out when unusual in motor.
For reaching above-mentioned purpose; the invention provides a kind of motor protection device; be useful in a motor; comprise the detecting unit of a detecting motor operation state with the output detection signal; one produces the reference cell of change type baseline signal; whether one more described detection signal and described change type baseline signal unusual judgement unit occurs to differentiate described motor; and one obtain that described judgement unit is differentiated the result and the protected location of described motor drive current occurs limiting when unusual at described motor; it is characterized in that: described reference cell is according to a revolution detection signal (R.D.signal; Rotation Detection signal) to adjust described change type baseline signal; learning by described revolution detection signal and described detection signal whether described motor occurs unusually simultaneously, and then reach described motor and occur described motor being carried out double shield when unusual.
For reaching above-mentioned purpose, the present invention provides a kind of motor guard method in addition, is useful in a motor, comprising: detecting means, and it exports a detection signal according to described motor operation state; One change type baseline signal produces means, and it exports a change type baseline signal according to a revolution detection signal (R.D.signal, Rotation Detection signal); One differentiation means, whether its more described detection signal and described change type baseline signal occur unusually to differentiate described motor, and export one according to differentiating the result and differentiate signal; With a salvo, it is obtained described differentiation signal and described motor drive current occurs limiting when unusual at described motor.
Description of drawings
Fig. 1 is the waveform schematic diagram of prior art motor drive current and revolution detection signal;
Fig. 2 is the configuration diagram of a preferred embodiment of the present invention;
Fig. 3 is the waveform schematic diagram of a preferred embodiment of the present invention motor drive current and revolution detection signal;
Fig. 4 is the configuration diagram of a preferred embodiment of the present invention reference cell;
Fig. 5 is the schematic flow sheet of another preferred embodiment of the present invention.
Description of reference numerals: 1-motor; The 2-detecting unit; The S1-detection signal; The 3-reference cell; S2-change type baseline signal; The 4-judgement unit; S3-differentiates signal; The 5-protected location; The 6-motor drive unit; The Vin-electric power source.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
See also Fig. 2 and shown in Figure 3, it is the configuration diagram of a preferred embodiment of the present invention and the waveform schematic diagram of motor drive current, and as shown in the figure: the invention provides a kind of motor protection device, be useful in a motor 1, described motor protection device comprises:
The detecting unit 2 of one detecting motor 1 operating state to export a detection signal S1;
One produces the reference cell 3 of a change type baseline signal S2;
One more described detection signal S1 and described change type baseline signal S2 are to export the judgement unit 4 of a differentiation signal S3, and wherein said differentiation signal S3 includes the described motor 1 of differentiation and unusual differentiation result whether occurs; And
One obtains the differentiation result of described judgement unit 4 and occurs when unusual at described motor 1, control a motor drive unit 6 to limit the protected location 5 of described motor 1 drive current, to make described motor 1 hang down the maximum constraints current value that sets at motor 1 original current-limiting circuit (not shown) at the drive current of (Lock) unusual back institute interval reception that occurs to turn round, and then effectively prevent excessive accumulation heat in motor 1 Inside coil, and avoid the generation of hazard events such as high temperature damage;
Wherein, the said motor protective device is characterised in that:
Described reference cell 3 is according to a revolution detection signal (R.D.signal, Rotation Detectionsignal) to adjust described change type baseline signal S2, learning by described revolution detection signal and described detection signal S1 whether described motor 1 occurs unusually simultaneously, and then reach the effectiveness that double shield appears described motor 1 being carried out when unusual in described motor 1.
See also shown in Figure 4ly, it is the configuration diagram of a preferred embodiment of the present invention reference cell.Described in the present embodiment reference cell 3 includes obtains electric power source Vin to export the partial pressure unit of described change type baseline signal S2, and one obtain described revolution detection signal to adjust the regulating switch M1 of described change type baseline signal S2, in the present embodiment, partial pressure unit is by resistance R 1, R2, R3 forms.
See also shown in Figure 5ly, it is for the schematic flow sheet of another preferred embodiment of the present invention.The present invention provides a kind of motor guard method in addition, is useful in described motor 1, comprising:
One detecting means A1, it exports above-mentioned detection signal S1 according to described motor 1 operating state;
One change type baseline signal produces means A2, and it rotates detection signal (R.D.signal, Rotation Detection signal) and export above-mentioned change type baseline signal S2 according to said motor;
One differentiates means A3, and whether its more described detection signal S1 and described change type baseline signal S2 occur unusually to differentiate described motor 1, and exports above-mentioned differentiation signal S3 according to differentiating the result; With
One salvo A4; it is obtained described differentiation signal S3 and limit described motor 1 drive current when described motor 1 appearance is unusual; preferable embodiment is the locking means A5 that continues behind the described salvo A4, and described locking means A5 is limited in a low current value with described motor 1 drive current locking.
In sum, owing to the present invention when motor 1 be subjected to that can't to turn round appears in external force restriction unusual the time limit motor 1 drive current, so can prevent effectively that motor 1 will be because of big current value excessive accumulation heat in motor 1 Inside coil in motor 1 driving electric of at interval output, and then avoid the generation of danger peace incident such as high temperature damage; In addition, by learning by revolution detection signal and detection signal S1 whether motor 1 occurs unusually simultaneously, make motor 1 have the double shield of detecting revolution detection signal and detection signal S1, so the present invention has progressive and meet the important document of applying for patent of invention, file an application in accordance with the law.
The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (2)
1. motor protection device; be useful in a motor; it comprises the detecting unit of a detecting motor operation state with the output detection signal; one produces the reference cell of change type baseline signal; whether one more described detection signal and described change type baseline signal unusual judgement unit occurs to differentiate described motor; and one obtain that described judgement unit is differentiated the result and the protected location of described motor drive current occurs limiting when unusual at described motor, it is characterized in that:
Described reference cell foundation one revolution detection signal is to adjust described change type baseline signal, learning by described revolution detection signal and described detection signal whether described motor occurs unusually simultaneously, and then reach described motor and occur described motor being carried out double shield when unusual;
Described reference cell includes obtains electric power source exporting the partial pressure unit of described change type baseline signal, and one obtains described revolution detection signal to adjust the regulating switch of described change type baseline signal.
2. a motor guard method is useful in a motor, and it is characterized in that: it comprises:
One detecting means, it exports a detection signal according to described motor operation state;
One change type baseline signal produces means, and it exports a change type baseline signal according to a revolution detection signal;
One differentiation means, whether its more described detection signal and described change type baseline signal occur unusually to differentiate described motor, and export one according to differentiating the result and differentiate signal;
One salvo, it is obtained described differentiation signal and described motor drive current occurs limiting when unusual at described motor; With
One locking means, described locking means are limited in a low current value with described motor drive current locking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101514661A CN101414745B (en) | 2007-10-18 | 2007-10-18 | Motor protection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101514661A CN101414745B (en) | 2007-10-18 | 2007-10-18 | Motor protection device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101414745A CN101414745A (en) | 2009-04-22 |
| CN101414745B true CN101414745B (en) | 2011-09-21 |
Family
ID=40595126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101514661A Expired - Fee Related CN101414745B (en) | 2007-10-18 | 2007-10-18 | Motor protection device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101414745B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX2012010435A (en) * | 2010-03-11 | 2013-01-29 | Sumitomo Metal Ind | Positioning device, working system, and hot working apparatus. |
| CN111129771B (en) * | 2019-11-30 | 2022-01-28 | Oppo广东移动通信有限公司 | Network device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6150789A (en) * | 1999-02-13 | 2000-11-21 | Tri-Tech, Inc. | Stepper motor control |
| CN1538584A (en) * | 2003-03-17 | 2004-10-20 | 株式会社电装 | Motor control equipment |
| CN2686178Y (en) * | 2004-02-24 | 2005-03-16 | 张建兴 | Electrocar block power-off protection circuit |
-
2007
- 2007-10-18 CN CN2007101514661A patent/CN101414745B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6150789A (en) * | 1999-02-13 | 2000-11-21 | Tri-Tech, Inc. | Stepper motor control |
| CN1538584A (en) * | 2003-03-17 | 2004-10-20 | 株式会社电装 | Motor control equipment |
| CN2686178Y (en) * | 2004-02-24 | 2005-03-16 | 张建兴 | Electrocar block power-off protection circuit |
Non-Patent Citations (1)
| Title |
|---|
| JP平7－329808A 1995.12.19 |
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| Publication number | Publication date |
|---|---|
| CN101414745A (en) | 2009-04-22 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20181018 |