CN203606479U - Detector for Hall current sensors of drilling frequency converter - Google Patents
Detector for Hall current sensors of drilling frequency converter Download PDFInfo
- Publication number
- CN203606479U CN203606479U CN201320817497.7U CN201320817497U CN203606479U CN 203606479 U CN203606479 U CN 203606479U CN 201320817497 U CN201320817497 U CN 201320817497U CN 203606479 U CN203606479 U CN 203606479U
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- CN
- China
- Prior art keywords
- hall current
- current sensor
- frequency converter
- milliammeter
- transformer
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- Expired - Fee Related
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Abstract
The utility model provides a detector for Hall current sensors of a drilling frequency converter. The detector comprises a single-phase adjustable transformer, a single-phase transformer, an AC ammeter, bulbs, an AC milliammeter, a dc power source and a primary-side coil; and is characterized in that the output end of the single-phase adjustable transformer is connected with the input end of the single-phase transformer, the two output ends of the single-phase transformer are connected with the primary-side coil respectively via the AC ammeter and the bulbs, the primary-side coil is wound around the primary side of the detected Hall current sensor, the dc power source supplies power to the detected Hall current sensor, and the AC milliammeter is connected in series between the output of the detected Hall current sensor and the ground. The detector can measure the transformation ratio of the Hall current sensors to provide parameter basis for replacement of the Hall current sensor, can judge the Hall current sensors, is characterized by simple structure, convenient application and accurate determination, and can be widely applied to detection for the Hall current sensors.
Description
Technical field
The utility model relates to pick-up unit, is specifically related to drilling well frequency converter detection device for Hall current sensor.
Background technology
Hall current sensor has that precision is high, good linearity, bandwidth, response are fast, overload capacity is lost by force and not the advantages such as metering circuit energy, thereby is widely used in RHVC.In frequency converter, be equiped with three Hall current sensors.The Hall current sensor using in frequency converter for drilling well, its Main Function is the expensive high power transistor of protection.Because the response time of Hall current sensor is fast, therefore, while there is overload short circuit, before not reaching capacity temperature, transistor can cut off the electricity supply, and IGBT is protected reliably.
The specific works process of Hall current sensor is: in the time that major loop has an electric current to pass through, the magnetic field producing on wire is assembled by magnetism gathering rings and is sensed on hall device, the signal producing is exported for driving corresponding power tube and making its conducting, thereby obtains an offset current.This electric current produces magnetic field by multicircuit winding again, and this magnetic field is just in time contrary with the magnetic field that tested electric current produces, thereby has compensated original magnetic field, and the output of hall device is reduced gradually.In the time that produced magnetic field equates, secondary current no longer increases, the proportional relation of secondary current at this moment and primary current.
In the frequency converter maintenance maintenance that drive on top and electric drive turntable uses, while judging Hall current sensor quality, there is defect in prior art judgement, the one, can not detect Hall current sensor linearity, the 2nd, taking DC detection method may cause Hall current sensor after detection, to produce remanent magnetism affects service precision.
Utility model content
Technical problem to be solved in the utility model is to provide drilling well frequency converter detection device for Hall current sensor.
In order to address the above problem, according to the technical solution of the utility model, drilling well frequency converter detection device for Hall current sensor, comprises monophase type adjustable transformer, single transformer, AC reometer, bulb, AC milliammeter, direct supply and primary coil; It is characterized in that: monophase type adjustable transformer output terminal is connected with single transformer input end, two output terminals of single transformer are connected primary coil by AC reometer with bulb respectively, primary coil is wound in the former limit of tested Hall current sensor, direct supply is tested Hall current sensor power supply, and AC milliammeter is connected between the output and ground of tested Hall current sensor.
The utility model is because described primary coil connects monophase type adjustable transformer by single transformer, make this device can pass through to regulate easily the output voltage of AC power, change the current value that flows through primary coil, connect the AC reometer and the AC milliammeter that is connected output terminal on former limit by observation, determine no-load voltage ratio, to judge the linear feature of frequency converter Hall current sensor, identify thus the quality of frequency converter Hall current sensor;
Drilling well described in the utility model with the beneficial effect of frequency converter detection device for Hall current sensor is: the utility model takes to exchange detection mode, and avoiding direct current detection may cause Hall current sensor after detection, to produce remanent magnetism affects precision; This device not only can be measured the no-load voltage ratio of Hall current sensor, for the replacement of Hall current sensor provides parameter foundation, can also judge Hall current sensor quality, and the accuracy of judgement reaches 100%; The utlity model has simple in structurely, apply feature easy, accuracy of judgement; Can be widely used in Hall current sensor detects.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the utility model drilling well frequency converter detection device for Hall current sensor.
Embodiment
Referring to Fig. 1, frequency converter detection device for Hall current sensor, comprises monophase type adjustable transformer 2, single transformer 3, AC reometer 4, bulb 5, AC milliammeter 7, direct supply 8 and primary coil 9; Wherein: monophase type adjustable transformer 2 output terminals are connected with single transformer 3 input ends, 3 two output terminals of single transformer are connected primary coil 9 by AC reometer 4 with bulb 5 respectively, primary coil 9 is wound in the former limit of tested Hall current sensor 6, direct supply 8 is powered for tested Hall current sensor 6, and AC milliammeter 7 is connected between the output and ground of tested Hall current sensor 6.
In the time of concrete application, primary coil 9 is got 10 to 30 circles and is wound in the former limit of tested Hall current sensor 6, and bulb 5 adopts 3 to 10 12V50W bulb parallel connections; Described AC reometer 4 can be selected the AC2A current gear of 4 Semi-digital multimeters; Described AC milliammeter 7 can be selected the AC200mA current gear of 4 Semi-digital multimeters; Described direct supply 8 can adopt the power supply of the positive and negative 15V of output.
Determination methods:
Tentatively judge: for tested Hall current sensor 6 connects the power supply of positive and negative 15V, former limit power supply 1 is disconnected, under the state that is zero at primary current, observe the reading of AC milliammeter 7, the reading of normal frequency converter Hall current sensor is close to 0mA, in the time that the reading of AC milliammeter 7 is greater than 0.1mA, tested Hall current sensor 7 performance depreciations are described, need to change;
Measure no-load voltage ratio: according to frequency converter Hall current sensor primary current ip and output current is relational expression, can measure no-load voltage ratio and the linearity of tested frequency converter Hall current sensor:
Is×ns=ip×np。
Wherein, is-output current; Ip-primary current; Np-primary coil number of turn; Ns-output winding number of turn; Np/ns-turn ratio.
Take LEM LF1005-S as example, primary coil 9 numbers of turn are 30 circles, and it is 1A, i.e. ip=1000mA × 30 that adjustment monophase type adjustable transformer makes AC reometer 4 readings; The reading of observing AC milliammeter 7 is 6mA, just can calculate no-load voltage ratio:
ns/np=ip/is
ns/np=1000×30/6=5000/1
Calculate: the no-load voltage ratio of LF1005-S Hall current sensor is 5000:1
Measure linear: slowly adjust monophase type adjustable transformer AC reometer 4 readings are strengthened gradually from zero, observe the reading of AC reometer 4 and AC milliammeter 7, whether according to the linear change that is related to of is × ns=ip × np.For example: LF1005-S Hall current sensor, when primary coil 9 numbers of turn are 10 circle, while observing AC reometer 4 for 0A, the reading of AC milliammeter 7 is 0.021mA, in the time that AC reometer 4 is 1A, be that tested Hall current sensor 6 primary currents are 1A × 10, the reading of observing AC milliammeter 7 is 2.004mA, in the time that AC reometer 4 is 5A, the reading of observing AC milliammeter 7 is 10.047mA, in the time that AC reometer 4 electric currents are 10A, be that tested Hall current sensor 6 primary currents are 10A × 10, the reading of observing AC milliammeter 7 is 20.112mA, illustrate that tested Hall current sensor is functional.According to the relation of is × ns=ip × np, if it is too large to observe the deviation of reading of AC milliammeter 7, illustrate that tested Hall current sensor 6 is linear bad, need to change.
This device takes to exchange detection mode, and avoiding direct current detection may cause Hall current sensor after detection, to produce remanent magnetism affects precision.The step-less adjustment of starting from scratch input current, judges by manner of comparison whether its performance exists defect, and the accuracy of judgement reaches 100%.This device not only can be measured the no-load voltage ratio of Hall current sensor, for the replacement of Hall current sensor provides parameter foundation, can also judge Hall current sensor quality, and simple to operate, and accuracy of judgement is quick, can reduce and stop boring the repair time.
Claims (1)
1. drilling well frequency converter detection device for Hall current sensor, comprises monophase type adjustable transformer (2), single transformer (3), AC reometer (4), bulb (5), AC milliammeter (7), direct supply (8) and primary coil (9); It is characterized in that: monophase type adjustable transformer (2) output terminal is connected with single transformer (3) input end, (3) two output terminals of single transformer are connected primary coil (9) by AC reometer (4) with bulb (5) respectively, primary coil (9) is wound in the former limit of tested Hall current sensor (6), direct supply (8) is tested Hall current sensor (6) power supply, and AC milliammeter (7) is connected between the output and ground of tested Hall current sensor (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320817497.7U CN203606479U (en) | 2013-12-12 | 2013-12-12 | Detector for Hall current sensors of drilling frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320817497.7U CN203606479U (en) | 2013-12-12 | 2013-12-12 | Detector for Hall current sensors of drilling frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203606479U true CN203606479U (en) | 2014-05-21 |
Family
ID=50719144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320817497.7U Expired - Fee Related CN203606479U (en) | 2013-12-12 | 2013-12-12 | Detector for Hall current sensors of drilling frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203606479U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283478A (en) * | 2018-09-11 | 2019-01-29 | 宁波北仑国际集装箱码头有限公司 | Port machinery equipment Hall transformer test device and method |
-
2013
- 2013-12-12 CN CN201320817497.7U patent/CN203606479U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283478A (en) * | 2018-09-11 | 2019-01-29 | 宁波北仑国际集装箱码头有限公司 | Port machinery equipment Hall transformer test device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20161212 |