CN204089668U - High-torque low speed permanent magnet synchronous motor speed of service on-line detecting system - Google Patents
High-torque low speed permanent magnet synchronous motor speed of service on-line detecting system Download PDFInfo
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- CN204089668U CN204089668U CN201420473818.0U CN201420473818U CN204089668U CN 204089668 U CN204089668 U CN 204089668U CN 201420473818 U CN201420473818 U CN 201420473818U CN 204089668 U CN204089668 U CN 204089668U
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- 238000001514 detection method Methods 0.000 claims abstract description 19
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
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- 239000010959 steel Substances 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000002463 transducing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model relates to a kind of high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system, motor is provided with the signal pickup assembly for obtaining motor voltage signal, signal pickup assembly is the voltage sensor for gathering electric moter voltage input signal and/or the frequency converter for exporting its voltage output signal, motor is external rotor low-speed and large-torque permagnetic synchronous motor, described external rotor low-speed and large-torque permagnetic synchronous motor comprises the external rotor of tubular and is positioned at the stator of described external rotor, the two ends of described external rotor are provided with fixed disk, the described fixed disk being positioned at one end connects rotary encoder, the described fixed disk being positioned at the other end is furnished with the brake tongs device of formation disk brake supporting with it.The utility model structure is simple, can facilitate, effectively, the motor speed of service of accurate on-line checkingi motor, be specially adapted to the detection of high-torque low speed permanent magnet synchronous motor and the load/motor speed of service based on the crane gearless lifting mechanism of this motor.
Description
Technical field
The utility model relates to a kind of high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system, is adapted to external rotor low-speed and large-torque permagnetic synchronous motor especially and detects based on the motor/reel speed of service of the crane gearless lifting mechanism of this motor.
Background technology
The motor speed of service of existing motor and crane hoisting mechanism is typically employed in mode rotating shaft connecting encoder and detects, for the external rotor electric machine that axis is different, the detection carrying out the motor speed of service with the encoder of external rotor synchronous rotary then can be set, but based on device structure, the consideration of the aspect such as volume and field condition, the detection adopting encoder to carry out motor speed is not suitable for all motors, particularly high-torque low speed permanent magnet synchronous motor, such as the lifting mechanism of crane, in reality, part lifting mechanism does not arrange encoder, although or be provided with encoder but normal operation can not be ensured, therefore just need to develop the detection technique that makes new advances to adapt to the needs of different occasion.
Summary of the invention
In order to overcome the above-mentioned defect of prior art, the utility model provides a kind of high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system, can facilitate, effectively, the motor speed of service of accurate on-line checkingi motor.
The utility model realizes the technical scheme that above-mentioned purpose adopts:
A kind of high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system, comprise motor, described motor is provided with the signal pickup assembly for obtaining motor voltage signal, described signal pickup assembly is the voltage sensor for gathering electric moter voltage input signal and/or the frequency converter for exporting its voltage output signal, described motor is external rotor low-speed and large-torque permagnetic synchronous motor, described external rotor low-speed and large-torque permagnetic synchronous motor comprises the external rotor of tubular and is positioned at the stator of described external rotor, the two ends of described external rotor are provided with fixed disk, the described fixed disk being positioned at one end connects rotary encoder, the described fixed disk being positioned at the other end is furnished with the brake tongs device of formation disk brake supporting with it, this fixed disk forms the brake disc of described disk brake and the disk body part being extended to the hull outside of described external rotor by its radial direction is coordinated with the brake pad of described brake tongs device.
The beneficial effects of the utility model: the research according to applicant finds, in the reasonable detection range requiring according to permagnetic synchronous motor real work to determine, there is positive correlation in the motor speed of service and electric moter voltage (input voltage of motor), Fig. 2 shows a kind of voltage/speed curves being used as the high-torque low speed permanent magnet synchronous motor of crane gearless lifting mechanism, this curve is the simple curve of a rising, all corresponding to the motor speed of service determined under the voltage determined arbitrarily, therefore the motor speed of service of motor can be calculated according to electric moter voltage, also corresponding supervising device can be sent into by the direct transducing signal being used as gathered voltage signal to embody the motor speed of service according to actual needs, monitor or control the running status of motor, but when needing to limit motor maximum speed, the voltage signal threshold value that can exceed the speed limit according to the relation setting check motor speed of service between the motor speed of service and voltage, when gathered voltage signal meets or exceeds given voltage signal threshold value, start overspeed protection action, thus for the on-line checkingi of the motor speed of service provides one mode easily, particularly considering that the supervising device of motor under prior art is generally all provided with can the voltage sensor (comprising other element/devices with this function) of on-line checkingi electric moter voltage, be very easy to the collection of motor running speed signal and the monitoring and controlling of the motor speed of service thus.Simultaneously relative to the encoder under prior art, contribute to overall structure is more optimized, reduce number of devices, reduce costs, reduce volume and take and requirement to place size, be convenient to installation and maintenance.
Due to the fixed disk of external rotor one end is connected to rotary encoder, position and the motor message of external rotor can be gathered accurately by rotary encoder, these signals are used for the control of motor power/frequency converter, be conducive to the running status improving motor, owing to being provided with the disk brake supporting with the fixed disk of the other end, the braking to external rotor can be realized, particularly when adopting electric braking to realize motor stalling, the maintenance of external rotor position can be realized after motor stops by disk brake, to adapt to the application under the occasions such as crane hoisting mechanism.
The utility model instead of the detection mode of existing encoder according to the required signal of telecommunication of rotating signal generation by the mode of direct-detection voltage signal, easily and fast, accurately, reliably, can meet the testing requirement under some occasions such as crane hoisting mechanism.
Accompanying drawing explanation
Fig. 1 is the system configuration schematic diagram that the utility model relates to;
Fig. 2 is an example of the electric moter voltage that relates to of the utility model and motor speed of service relation curve, low-speed and large-torque permanent-magnetic outer rotor synchronous machine is adopted directly to be used as the gearless lifting mechanism of crane in this example, its external rotor as the cable drum of crane rope reel system, direct Wound steel rope.
Embodiment
See Fig. 1, the utility model provides a kind of high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system, comprise motor, described motor is provided with for the signal pickup assembly for obtaining motor voltage signal, described signal pickup assembly be voltage sensor for gathering electric moter voltage input signal (being preferably voltage transformer) and/or for can export its voltage output signal for the frequency converter to described feeding electric motors, described motor is external rotor low-speed and large-torque permagnetic synchronous motor, described external rotor low-speed and large-torque permagnetic synchronous motor comprises the external rotor of tubular and is positioned at the stator of described external rotor, the two ends of described external rotor are provided with fixed disk, the described fixed disk being positioned at one end connects rotary encoder, the described fixed disk being positioned at the other end is furnished with the brake tongs device of formation disk brake supporting with it, this fixed disk forms the brake disc of described disk brake and the disk body part being extended to the hull outside of described external rotor by its radial direction is coordinated with the brake pad of described brake tongs device.The voltage signal of described motor is the stator voltage sig of described high-torque low speed permanent magnet synchronous motor.The voltage signal output end of described signal pickup assembly connects the motor running speed signal input of detection control apparatus by holding wire, so that supporting with corresponding control device, corresponding induced signal is sent into described control device.
According to the experiment of applicant, described motor is in
the vector control state of=0, under this state, the motor speed of service and stator voltage are in the positive correlation determined, its concrete numerical relation is determined by experiment, usually be determined by experiment the magnitude of voltage of permagnetic synchronous motor under the different speed of service, show that the relation V=KU(K of voltage U and motor speed of service V is voltage and length velocity relation coefficient).The real-time speed of service of motor is calculated according to voltage and motor speed of service relation again by control device.In addition, for making drawn motor speed of service V more accurate, some special circumstances related to when other influences factor can be taken into account in the lump or run for motor when testing and/or calculate process.
Thus, pass through the speed of service data that obtained voltage signal just can calculate motor, or the motor running speed signal incoming end directly voltage signal being accessed corresponding detection control apparatus directly controls accordingly, and does not need to convert or calculate motor speed of service data to.
The speed of service of carrying out owing to adopting encoder under prior art detects, the signal exported is identical with the signal properties that above-mentioned voltage sensor exports, all that positively related electricity exports (electric current and/or voltage) with the motor speed of service, therefore the detection control apparatus that voltage sensor of the present utility model can be corresponding under prior art is supporting, for described detection control apparatus provides the transducing signal that can embody the motor speed of service, described voltage sensor and set-up mode can adopt prior art, described detection control apparatus also can adopt the detection control apparatus of any suitable under prior art.Described detection control apparatus can be simple only carry out the Displaying Meter that shows and/or report to the police or warning device according to the size of the electric analoging signal obtained, such as, adopt the control device be made up of electronic circuit.When adopt need the control device relying on certain software work time, hardware structure of the present utility model allows to work under the support of corresponding software, and namely the utility model is that the operation of corresponding software provides suitable hardware structure.
Usually, described detection control apparatus is rotating speed display/alarm for being described detection control apparatus, also can for the motor controlling cabinet for controlling described machine operation, can also show for rotating speed/alarm and the combination for the motor controlling cabinet that controls described machine operation, to meet corresponding various instructions for use.
As one of above-mentioned each technical scheme important application, described motor can be external rotor electric machine, and as the gearless lifting mechanism of crane, the external rotor of described motor is used as the reel of lifting mechanism, connects and the steel wire rope of the crane that reels.
The utility model can also adopt following method to carry out the on-line checkingi of the motor speed of service, by reading the voltage signal of frequency converter or being gathered the voltage signal of motor by voltage sensor, be used as embody the transducing signal of the motor speed of service or calculate the motor speed of service data of acquisition motor according to described voltage signal with described voltage signal, described motor can be permagnetic synchronous motor, particularly high-torque low speed permanent magnet synchronous motor.
Such as, usually the display being carried out motor speed by display or Displaying Meter is needed, if need to set alarm velocity, voltage threshold corresponding under then can setting alarm velocity, when the voltage obtained according to described transducer meets or exceeds the voltage threshold of setting, starter motor overspeed alarming and/or hypervelocity control action, particularly for external rotor low-speed and large-torque outer rotor permagnetic synchronous motor or the crane hoisting mechanism based on this motor, corresponding frequency converter needs the rotating speed of foundation external rotor and position to control usually, the induced signal (comprising amplitude and phase place) that can be obtained by transducer is as controlling foundation.
For the facility in statement, motor alleged by the utility model is motor.
In order to the facility stated, unless otherwise indicated, high-torque low speed permanent magnet synchronous motor alleged by the utility model makes a general reference this motor and the various embody rule forms based on this motor, such as, based on the crane gearless lifting mechanism of low-speed and large-torque outer rotor permagnetic synchronous motor.
The alleged crane gearless lifting mechanism based on low-speed and large-torque outer rotor permagnetic synchronous motor of the utility model refers to that being directly wound around and pining down steel wire rope with the reel external rotor of this motor being used as lifting mechanism carries out hoisting the crane hoisting mechanism of operation, this lifting mechanism does not need to arrange gear box, greatly simplifie structure thus, reduce volume, reduce energy consumption, decrease fault, facilitate operation and maintenance.
Claims (6)
1. a high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system, comprise motor, it is characterized in that described motor is provided with the signal pickup assembly for obtaining motor voltage signal, described signal pickup assembly is the voltage sensor for gathering electric moter voltage input signal and/or the frequency converter for exporting its voltage output signal, described motor is external rotor low-speed and large-torque permagnetic synchronous motor, described external rotor low-speed and large-torque permagnetic synchronous motor comprises the external rotor of tubular and is positioned at the stator of described external rotor, the two ends of described external rotor are provided with fixed disk, the described fixed disk being positioned at one end connects rotary encoder, the described fixed disk being positioned at the other end is furnished with the brake tongs device of formation disk brake supporting with it, this fixed disk forms the brake disc of described disk brake and the disk body part being extended to the hull outside of described external rotor by its radial direction is coordinated with the brake pad of described brake tongs device.
2. high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system as claimed in claim 1, is characterized in that described motor voltage signal is the stator voltage sig of described high-torque low speed permanent magnet synchronous motor.
3. high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system as claimed in claim 2, is characterized in that the voltage signal output end of described signal pickup assembly connects the motor running speed signal input of detection control apparatus by holding wire.
4. high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system as claimed in claim 3, is characterized in that described voltage sensor is voltage transformer.
5. high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system as claimed in claim 4, it is characterized in that described detection control apparatus is rotating speed display/alarm, and/or described detection control apparatus is the motor controlling cabinet for controlling described machine operation.
6. the high-torque low speed permanent magnet synchronous motor speed of service on-line detecting system as described in claim 1,2,3,4 or 5, it is characterized in that described motor is external rotor electric machine, as the gearless lifting mechanism of crane, the external rotor of described motor is used as the reel of lifting mechanism, connects and the steel wire rope of the crane that reels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420473818.0U CN204089668U (en) | 2014-08-21 | 2014-08-21 | High-torque low speed permanent magnet synchronous motor speed of service on-line detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420473818.0U CN204089668U (en) | 2014-08-21 | 2014-08-21 | High-torque low speed permanent magnet synchronous motor speed of service on-line detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204089668U true CN204089668U (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420473818.0U Expired - Lifetime CN204089668U (en) | 2014-08-21 | 2014-08-21 | High-torque low speed permanent magnet synchronous motor speed of service on-line detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204089668U (en) |
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2014
- 2014-08-21 CN CN201420473818.0U patent/CN204089668U/en not_active Expired - Lifetime
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| C14 | Grant of patent or utility model | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20150107 |
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| CX01 | Expiry of patent term |