CN109842335B - Electric device and motor control device - Google Patents
Electric device and motor control device Download PDFInfo
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- CN109842335B CN109842335B CN201711190056.8A CN201711190056A CN109842335B CN 109842335 B CN109842335 B CN 109842335B CN 201711190056 A CN201711190056 A CN 201711190056A CN 109842335 B CN109842335 B CN 109842335B
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- motor
- rotating shaft
- magnetic field
- detection device
- control device
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Abstract
The present invention relates to an electric device and a motor control device, wherein the motor control device includes: the detection equipment is arranged in a magnetic field signal sensing area of the magnetic field generator and does not move along with the movement of the rotating shaft; the detection device is used for sensing a magnetic field signal generated by the magnetic field generator and converting the magnetic field signal into a level signal; and a control device connected with the detection device for receiving the level signal; the control equipment is used for determining the deflection angle of the rotating shaft according to the level signal and controlling the rotating speed of the motor when the deflection angle is larger than a threshold value so that the deflection angle of the rotating shaft is lower than the threshold value. The motor control device can ensure that the inner shell for accommodating the motor cannot touch the outer shell of the electric equipment, so that the motor and the electric equipment are effectively protected, and the stability of the electric equipment is improved.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to an electric device and a motor control device.
Background
The motor is used as an important component of the electric equipment, and the performance stability of the motor can greatly influence the product performance of the whole electric equipment. The traditional electric equipment can not effectively protect the motor when the rotating shaft of the motor swings and deflects, so that the stability of the electric equipment is poor.
Disclosure of Invention
Accordingly, it is necessary to provide an electric device and a motor control apparatus having high stability.
A motor control device is used for controlling a motor; the motor comprises a rotating shaft and a magnetic field generator arranged at one end of the rotating shaft; the motor control device includes:
the detection equipment is arranged in a magnetic field signal sensing area of the magnetic field generator and does not move along with the movement of the rotating shaft; the detection device is used for sensing a magnetic field signal generated by the magnetic field generator and converting the magnetic field signal into a level signal; and
the control device is connected with the detection device and used for receiving the level signal; the control equipment is used for determining the deflection angle of the rotating shaft according to the level signal and controlling the rotating speed of the motor when the deflection angle is larger than a threshold value so that the deflection angle of the rotating shaft is lower than the threshold value.
The detection device in the motor control device can detect the magnetic field signal of the magnetic field generator on the motor, convert the magnetic field signal into a corresponding level signal and output the level signal to the control device. Thereby controlgear can confirm the beat angle degree of motor rotation axis according to this level signal and control the rotational speed of motor so that the beat angle degree of rotation axis is less than the threshold value according to this beat angle degree, and then ensures that the interior casing of accomodating the motor can not touch the shell body of electrical equipment, realizes the effective protection to motor and electrical equipment, has improved electrical equipment's stability can.
In one embodiment, the detection device is disposed opposite the magnetic field generator on the rotating shaft; the distance between the detection device and the central axis of the rotating shaft is smaller than or equal to an allowable range, and the detection device and the magnetic field generator keep a preset distance.
In one embodiment, the detection device is arranged on the central axis of the rotation shaft.
In one embodiment, the detection device is a magnetic sensor.
In one embodiment, the magnetic sensor is a hall switch.
In one embodiment, the control device is configured to determine a yaw angle of the rotating shaft corresponding to the level according to a level of the level signal.
In one embodiment, the control device is configured to reduce the rotation speed of the motor or control the motor to stop operating when the yaw angle is greater than the threshold value.
In one embodiment, the control device is further configured to compare a level magnitude of the level signal with a reference level to determine a yaw direction of the rotating shaft, and to control the motor according to the yaw direction and the yaw angle.
In one embodiment, the control device is further configured to calculate the rotation speed of the motor according to a variation rule of the level signal.
An electrically powered device comprising an outer housing, a motor, and an inner housing that houses the motor; the stator of the motor and the inner shell are kept relatively static; the outer shell does not move with the movement of the inner shell; the motor comprises a rotating shaft and a magnetic field generator arranged at one end of the rotating shaft; the electric equipment also comprises a motor control device; the motor control device includes:
the detection equipment is arranged on the outer shell and is positioned in a magnetic field signal sensing area of the magnetic field generator; the detection device is used for sensing a magnetic field signal generated by the magnetic field generator and converting the magnetic field signal into a level signal; and
the control equipment is connected with the detection equipment and the motor; the control equipment is used for determining the deflection angle of the rotating shaft according to the level signal and controlling the rotating speed of the motor when the deflection angle is larger than a threshold value so that the deflection angle of the rotating shaft is lower than the threshold value.
Drawings
FIG. 1 is a schematic structural diagram of a motor control apparatus according to an embodiment;
FIG. 2 is a schematic diagram of a level signal output by the detection device in one embodiment;
FIG. 3 is a cross-sectional view of an embodiment of an electromotive device in which a rotating shaft is not wobbled;
fig. 4 is a cross-sectional view of an embodiment of an electromotive device in which a rotating shaft is deflected and contacts a housing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The motor control device in one embodiment can control the working process of the motor to realize effective protection of the motor. The motor control device can be applied to an electric device having a double-layer housing, for example, it can be applied to a swing machine having a double-layer housing. The electric device includes an outer housing, a motor, and an inner housing that houses the motor. In the working process of the electric equipment, the stator of the motor and the inner shell are kept relatively static; because there is the clearance between interior casing and the shell body, the shell body can not move along with interior casing. The motor includes a rotating shaft 10 and a magnetic field generator 20 disposed at one end of the rotating shaft 10. Fig. 1 is a schematic structural diagram of a motor control apparatus in an embodiment, and the motor control apparatus includes a detection device 110 and a control device 120.
The detection device 110 is disposed on the outer housing and within the magnetic field signal sensing region of the magnetic field generator 20. That is, in the present embodiment, the position of the detection device 110 is fixed without being affected by the movement of the rotation shaft 10. The detection device is used to sense the magnetic field signal generated by the magnetic field generator 20 and convert the magnetic field signal to a corresponding level signal. The magnetic field signal sensing area of the magnetic field generator 20 is the area where the detection device 110 can sense the magnetic field signal generated by the magnetic field generator 20. In one embodiment, the size of the magnetic field signal sensing region can vary according to the sensitivity of the detection device 110 and the strength of the magnetic field signal of the magnetic field generator 20, and is not limited to a specific area.
In one embodiment, magnetic field generator 20 may be a multi-stage magnet or other device capable of generating a magnetic field. When the magnetic field generator 20 rotates with the rotating shaft 10, a varying magnetic field is generated. Detection device 110 may sense the magnetic field signal generated by magnetic field generator 20 and convert the magnetic field signal to a corresponding level signal. In one embodiment, the detection device 110 is a magnetic sensor. For example, the detection device 110 may employ a hall switch.
The control device 120 is connected to the detection device 110. The control device 120 receives the level signal output from the detection device 110 and determines the yaw angle of the rotating shaft 10 based on the level signal. In one embodiment, the control device 120 stores a corresponding table or a corresponding algorithm of the level magnitude and the yaw angle of the rotating shaft, so that it can obtain the yaw angle of the rotating shaft 10 corresponding to the level magnitude according to the level magnitude of the level signal. The control device 120 is also configured to monitor a yaw angle of the rotating shaft 10, and when the yaw angle is greater than a threshold value, control the rotation speed of the motor so that the yaw angle of the rotating shaft 10 is lower than the threshold value. In this embodiment, during the rotation of the rotating shaft 10, since the inner housing and the rotating shaft 10 are kept relatively stationary, the inner housing accommodating the motor also moves following the movement of the rotating shaft 10 of the motor, and thus the yaw occurs. In the process of deflection of the inner shell, the outer shell does not move along with the movement of the inner shell, so that the inner shell can be touched with the outer shell after being deflected to a certain deflection angle. Therefore, the threshold in this embodiment may be a yaw angle when the rotating shaft touches the outer housing after yaw, or a value lower than the yaw angle. In an embodiment, when the yaw angle of the rotating shaft 10 is greater than the threshold value, the control device 120 may decrease the rotation speed of the motor to control the yaw angle of the rotating shaft 10 within a preset allowable range. In another embodiment, the control device 120 may also directly control the motor to stop working when the yaw angle of the rotating shaft 10 is greater than a threshold value, so as to protect the motor, avoid the inner housing accommodating the motor from touching the outer housing of the electric device, protect the motor and the electric device, and further improve the stability of the whole device.
The detecting device 110 in the motor control apparatus can detect the magnetic field signal of the magnetic field generator 20 on the motor, convert the magnetic field signal into a corresponding level signal, and output the level signal to the control device 120. The control device 120 can determine the swing angle of the rotating shaft 10 of the motor according to the level signal, so that the rotating speed of the motor is controlled according to the swing angle, so that the swing angle of the rotating shaft 10 is lower than a threshold value, and further, the inner shell of the motor is ensured not to touch the outer shell of the electric device, the effective protection of the motor and the electric device is realized, and the stability of the electric device is improved.
In an embodiment, the detection device 110 is arranged opposite the magnetic field generator 20 on the rotating shaft 10, i.e. the detection device 110 is not arranged on the rotating shaft 10. When the rotating shaft 10 is not yawed, the relative positional relationship of the detection device 110 to the rotating shaft 10 and the magnetic field generator 20 is fixed. Specifically, the distance between the detection device 110 and the central axis of the rotating shaft 10 is less than or equal to the allowable range, and the detection device 110 and the magnetic field generator 20 maintain a preset distance. That is, the detection device 110 may be disposed on the central axis of the rotary shaft 10 or within an allowable range of the central axis. When the detection device 110 is disposed on the central axis of the rotating shaft 10, since the detection device 110 does not move in position when the rotating shaft is deflected leftwards or rightwards, the magnetic field signals detected by the detection device 110 also present a symmetrical relationship, and thus the corresponding relationship between the magnetic field signals and the level signals sensed in the whole deflection process can be determined only by determining the corresponding relationship between the deflection angle of the left deflection and the level signals. In other embodiments, when the detecting device 110 is disposed near the central axis of the rotating shaft 20, the level signals detected by the detecting device 110 when the rotating shaft 20 is deflected do not have symmetry, so that it is necessary to obtain the correspondence relationship between the level signals detected by the detecting device 110 and the rotating shaft 20 at different deflection angles through previous experiments. The preset distance between the detection device 110 and the magnetic field generator 20 can be adjusted according to the strength of the magnetic field signal generated by the magnetic field generator 20 and the sensitivity of the detection device 110, and it is only necessary to ensure that the detection device 110 can correctly detect the magnetic field signal generated by the magnetic field generator 20 in the position area. In an embodiment, the detection device 110 is arranged on the central axis of the rotating shaft 10, as shown in fig. 1.
In an embodiment, the control device 120 may also determine the yaw direction of the rotating shaft 10 according to the level signal. Specifically, the control device 120 compares the level magnitude of the received level signal with a reference level to determine the yaw direction of the rotating shaft 10, as shown in fig. 2. For example, in one embodiment, the reference level is 0.5V, when the level of the received level signal is higher than 0.5V, the rotation axis 10 may be determined as left-biased, otherwise the rotation axis 10 may be determined as right-biased. After determining the yaw direction of the rotating shaft 10, the control device 120 can regulate and control the rotating speed of the motor more accurately according to the yaw direction and the yaw angle.
In an embodiment, the control device 120 may further calculate the rotation speed of the motor according to a variation rule of the level signal, such as a variation period. That is, in the present embodiment, the detection device 110 and the control device 120 can measure the rotation speed of the motor while controlling the rotation speed of the motor to protect the motor, thereby being beneficial to reducing the weight of the device.
An embodiment of the present invention further provides an electric device, which includes an outer housing, a motor, and an inner housing for accommodating the motor, that is, the electric device has a dual-housing structure. In the working process of the electric equipment, the stator of the motor and the inner shell are kept relatively static; because there is the clearance between interior casing and the shell body, the shell body can not move along with interior casing. The motor comprises a rotating shaft and a magnetic field generator arranged at one end of the rotating shaft. The electrically powered device further comprises a motor control arrangement as described in any of the previous embodiments, wherein the detection device does not move with the inner housing. In an embodiment, the detection device in the motor control apparatus may be fixed to the outer housing. Fig. 3 is a sectional view of the electric device according to the embodiment when the rotating shaft is not swung, and fig. 4 is a sectional view of the electric device according to the embodiment when the rotating shaft is swung and touches the housing. Wherein 310 denotes an outer housing, 320 denotes an inner housing, and 330 denotes a motor. The electric equipment comprising the motor control device can prevent the electric equipment from appearing as in fig. 4, namely, can prevent the contact between the inner shell and the outer shell for accommodating the motor, thereby effectively protecting the electric equipment and the motor and being beneficial to improving the stability of the electric equipment. In one embodiment, the electrically powered device may be a swing machine having a double-deck enclosure.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A motor control device is used for controlling a motor; the motor comprises a rotating shaft and a magnetic field generator arranged at one end of the rotating shaft; characterized in that, the motor control device includes:
the detection device is arranged on the central axis of the rotating shaft or in an allowable range of the central axis, and is also arranged in a magnetic field signal sensing area of the magnetic field generator and does not move along with the movement of the rotating shaft; the detection device is used for sensing a magnetic field signal generated by the magnetic field generator and converting the magnetic field signal into a level signal; and
the control device is connected with the detection device and used for receiving the level signal; the control equipment is used for determining the deflection angle and the deflection direction of the rotating shaft according to the level signal, and controlling the rotating speed of the motor according to the deflection angle and the deflection direction when the deflection angle is larger than a threshold value so that the deflection angle of the rotating shaft is lower than the threshold value.
2. The motor control apparatus according to claim 1, wherein a distance between the detection device and a central axis of the rotating shaft is smaller than or equal to an allowable range, and the detection device is kept at a preset distance from the magnetic field generator.
3. The motor control apparatus according to claim 1, wherein the detection device is a magnetic sensor.
4. The motor control apparatus according to claim 3, wherein the magnetic sensor is a hall switch.
5. The motor control apparatus according to claim 1, wherein the control device is configured to determine a yaw angle of the rotating shaft corresponding to the level according to a level magnitude of the level signal.
6. The motor control apparatus according to claim 1, wherein the control device is configured to reduce a rotation speed of the motor or control the motor to stop operating when the yaw angle is larger than the threshold value.
7. The motor control apparatus according to claim 1, wherein the control device is further configured to compare a level magnitude of the level signal with a reference level to determine a yaw direction of the rotating shaft, and to control the motor according to the yaw direction and the yaw angle.
8. The motor control apparatus according to claim 1, wherein the control device is further configured to calculate a rotation speed of the motor based on a variation law of the level signal.
9. An electrically powered device comprising an outer housing, a motor, and an inner housing that houses the motor; the stator of the motor and the inner shell are kept relatively static; the outer shell does not move with the movement of the inner shell; the motor comprises a rotating shaft and a magnetic field generator arranged at one end of the rotating shaft; characterized in that the electric equipment also comprises a motor control device; the motor control device includes:
the detection device is arranged on the central axis of the rotating shaft or in an allowable range of the central axis, is also arranged on the outer shell, is positioned in a magnetic field signal sensing area of the magnetic field generator and does not move along with the movement of the rotating shaft; the detection device is used for sensing a magnetic field signal generated by the magnetic field generator and converting the magnetic field signal into a level signal; and
the control equipment is connected with the detection equipment and the motor; the control equipment is used for determining the deflection angle and the deflection direction of the rotating shaft according to the level signal, and controlling the rotating speed of the motor according to the deflection angle and the deflection direction when the deflection angle is larger than a threshold value so that the deflection angle of the rotating shaft is lower than the threshold value.
10. An electrically operated device according to claim 9, wherein the detection device in the motor control means is fixed to the outer housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711190056.8A CN109842335B (en) | 2017-11-24 | 2017-11-24 | Electric device and motor control device |
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| CN201711190056.8A CN109842335B (en) | 2017-11-24 | 2017-11-24 | Electric device and motor control device |
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| CN109842335A CN109842335A (en) | 2019-06-04 |
| CN109842335B true CN109842335B (en) | 2021-09-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202150835U (en) * | 2011-03-24 | 2012-02-22 | 上海众辰电子科技有限公司 | Special frequency converter for carving and milling machine |
| CN105522484A (en) * | 2016-02-24 | 2016-04-27 | 苏州瑞格思创光电科技有限公司 | Machining control method for glass engraving and milling machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101241787A (en) * | 2007-02-06 | 2008-08-13 | 上海瑞可运动器材有限公司 | A making method for Hall remote pole potentiometer |
| JP4340299B2 (en) * | 2007-03-08 | 2009-10-07 | 株式会社日立産機システム | Motor control device and motor control system |
| CN103383281A (en) * | 2013-06-27 | 2013-11-06 | 苏州边枫电子科技有限公司 | Automatic detecting and protecting device for drill vibration |
| CN104967371A (en) * | 2015-04-15 | 2015-10-07 | 北京航空航天大学 | Triaxial rotation mechanism control apparatus with real-time fault monitoring capability |
| JP6063016B1 (en) * | 2015-09-29 | 2017-01-18 | ファナック株式会社 | Machine learning method and machine learning device for learning operation command for electric motor, and machine tool provided with the machine learning device |
| JP6140331B1 (en) * | 2016-04-08 | 2017-05-31 | ファナック株式会社 | Machine learning device and machine learning method for learning failure prediction of main shaft or motor driving main shaft, and failure prediction device and failure prediction system provided with machine learning device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202150835U (en) * | 2011-03-24 | 2012-02-22 | 上海众辰电子科技有限公司 | Special frequency converter for carving and milling machine |
| CN105522484A (en) * | 2016-02-24 | 2016-04-27 | 苏州瑞格思创光电科技有限公司 | Machining control method for glass engraving and milling machine |
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