CN211426715U - Three-phase alternating voltage value and current value measuring device - Google Patents
Three-phase alternating voltage value and current value measuring device Download PDFInfo
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- CN211426715U CN211426715U CN201921697682.0U CN201921697682U CN211426715U CN 211426715 U CN211426715 U CN 211426715U CN 201921697682 U CN201921697682 U CN 201921697682U CN 211426715 U CN211426715 U CN 211426715U
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Abstract
The utility model discloses a three-phase alternating voltage value and current value measuring device, the device includes: the three-phase power supply comprises a main box body, and a three-phase power input module, a three-phase power output module, a power switching bar, a current sensor and a three-phase current contactor which are arranged in the main box body; the three-phase power input module is connected with the motor controller, the three-phase power output module is connected with the motor, the three-phase current contactor comprises an input end and an output end, the input end is provided with three connecting terminals, the three-phase power input module is connected with the input end of the three-phase current contactor, the output end of the three-phase current contactor is connected with the three-phase power output module, the current sensor is sleeved on the connecting line of one or more connecting terminals of the output end and the three-phase power output module, and the current sensor and the three-phase power output module are connected with the external power analyzer respectively. The utility model provides a measuring device easy operation has improved work efficiency, can effectively prevent electromagnetic interference, effective protection personnel safety.
Description
Technical Field
The utility model relates to a motor test measurement technical field, in particular to three-phase alternating voltage value and current value measuring device.
Background
The motor is an important part of a new energy automobile and mainly used for receiving the current and the control signal which are controlled and output by the motor controller, so that corresponding torque and the number of revolutions are output to drive the automobile. The conversion efficiency of the motor is an important parameter for measuring the quality of the motor, and the conversion efficiency is measured by a test bed. The output power P1 of the motor controller is measured by the power analyzer, the output power P0 of the motor is measured by the dynamometer, and the conversion efficiency of the motor is calculated
The power analyzer is used for measuring the output power of the motor controller, and a three-phase alternating current voltage value and a three-phase alternating current value output by the motor controller are required to be collected.
In the prior art, a three-phase alternating current voltage value is measured by directly fixing a voltage measuring terminal of a power analyzer on a three-phase wiring terminal output by a motor controller in a contact manner; the three-phase alternating current value is measured in a non-contact way that three phase lines output by the motor controller respectively penetrate through the current sensors, and the measured value is sent to the power analyzer. However, the method provided by the prior art has the following disadvantages:
1. in the preparation process of three-phase alternating voltage value measurement, the output plug connector of the motor controller needs to be detached, and even the plug connector of the motor controller needs to be damaged, so that the measurement terminal of the power analyzer can be connected, the working efficiency is low, and potential electric shock risks are left due to the damage of the plug connector. In the preparation process of measuring the three-phase alternating current value, a three-phase alternating current output line of the motor controller needs to be stripped of a surface insulating layer and an intermediate metal shielding layer, then the three-phase alternating current output line passes through a current sensor, and the current sensor is fixed on a test bench through a support. Therefore, the operation is long in time consumption and low in working efficiency. In addition, care needs to be taken in the process of stripping the shielding layer, and the inner insulating layer of the three-phase alternating current output line can be easily damaged without worry, so that potential electric shock risks are left.
2. The three-phase alternating current value can be interfered by an external magnetic field in the measuring process, and the measuring result is unreliable; in the measuring process, the high current causes the insulating layer at the connecting terminal of the three-phase line to age and even ablate; the three-phase alternating current output line causes the ageing of inlayer insulating layer at the measurement in-process heavy current, and insulation resistance value descends, has the risk of electrocution.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of the prior art, the embodiment of the utility model provides a three-phase alternating voltage value and current value measuring device is provided. The technical scheme is as follows:
a three-phase ac voltage and current value measuring device, the device comprising: the three-phase power supply comprises a main box body, and a three-phase power input module, a three-phase power output module, a power switching bar, a current sensor and a three-phase current contactor which are arranged in the main box body; the three-phase power input module is connected with a motor controller, the three-phase power output module is connected with a motor, the three-phase current contactor comprises an input end and an output end which are respectively provided with three connecting terminals, the three-phase power input module is connected with the input end of the three-phase current contactor, the output end of the three-phase current contactor is connected with the three-phase power output module, the current sensor is sleeved on a connecting line of one or more connecting terminals of the output end and the three-phase power output module, and the current sensor and the three-phase power output module are respectively connected with an external power analyzer and used for measuring a voltage value and a current value; the input end of the power supply switching row is connected with an external power supply, and the output end of the power supply switching row is connected with the current sensor.
Further, the apparatus further comprises: and the current sensor power supply is connected between the power switching row and the current sensor and supplies power to the current sensor.
Further, the apparatus further comprises: a three-phase current measurement output interface and a three-phase voltage measurement output interface; the three-phase current measurement output interface is connected with the current sensor, the three-phase voltage output interface is connected with the three-phase power output module, and the power analyzer is connected with the three-phase current measurement output interface and the three-phase voltage measurement output interface.
Further, the apparatus further comprises: the temperature controller is connected with the air exhaust device to control the air exhaust device to operate, and the temperature controller and the air exhaust device are both connected with the power supply switching row.
Further, the apparatus further comprises: and one end of the contact switch is connected with an external power supply, and the other end of the contact switch is connected with the power supply switching bar.
Further, the main case includes: the box body side face is provided with a three-phase voltage measuring output port, a three-phase current measuring output port, a power supply interface and a ventilation opening, and the bottom of the box body is provided with a three-phase power input port and a three-phase power output port.
Further, the apparatus further comprises: the walking adjustment mechanism, walking adjustment mechanism includes: the height adjusting mechanism and the base are arranged on the lower side of the height adjusting mechanism; be equipped with the universal wheel on the base, height adjusting mechanism includes: the height adjusting device comprises a fixing plate and a height adjusting rod, wherein the fixing plate is connected with the main box body.
Further, the height adjustment lever includes: the inner column is arranged in the outer column, the outer column and the inner column are respectively provided with an iron pin hole, and the iron pin simultaneously penetrates through the outer column and the iron pin hole of the inner column to be fixed at the position of the inner column. The embodiment of the utility model provides a beneficial effect that technical scheme brought is:
the embodiment of the utility model provides a beneficial effect that technical scheme brought is:
1. the measuring device provided by the utility model is simple to operate, improves the working efficiency and reduces the labor intensity of operators;
2. the measuring device provided by the utility model is arranged in the box body, can effectively prevent electromagnetic interference, and has high accuracy of measured data;
3. the utility model provides a measuring device, the box door is provided with a contact switch, the box door is opened, the power is automatically cut off, and the safety of personnel is effectively protected;
4. the utility model provides a measuring device, wherein a temperature controller is arranged in a box body, the temperature in the box body is adjustable, and the measuring environment temperature is ensured to meet the measuring requirement;
5. the utility model provides a three-phase current contactor that sets up in the measuring device box can provide overcurrent protection, avoids machine controller and motor circuit to damage.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic overall structure diagram of a measurement apparatus provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a measuring mechanism of a measuring device according to an embodiment of the present invention;
fig. 3 is a structural view of a safety protection mechanism of a measuring device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a main box of the measuring device provided by the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a walking adjustment mechanism of a measuring device according to an embodiment of the present invention.
In the figure: 10. a travel adjustment mechanism; 20. a main box body; 30. a measuring mechanism; 40. a safety protection mechanism; 50. a three-phase power input module; 60. a three-phase power output module; 11. a universal wheel; 12. a base; 13. a height adjustment mechanism; 131. an iron pin; 132. an iron pin hole; 133. an outer column; 134. an inner upright post; 135. a fixing plate; 21. a box door; 22. a box body; 211. a door lock; 221. a three-phase voltage measurement output port; 222. a three-phase current measurement output port; 223. an air inlet; 224. an air outlet; 225. a power interface; 226. a three-phase power input port; 227. a three-phase power outlet; 31. a three-phase voltage measuring mechanism; 32. a three-phase current measuring mechanism; 311. a three-phase voltage measurement output interface; 321. a current sensor; 322. a three-phase current measurement output interface; 323. a current sensor power supply; 324. a power supply switching row; 325. connecting the copper bars; 326. Measuring a copper bar; 41. a three-phase current contactor; 42. a temperature controller; 43. an air exhaust device; 44. a contact switch.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model provides a three-phase alternating voltage value and current value measuring device, it is shown with reference to figure 1, this three-phase alternating voltage value and current value measuring device includes: the device comprises a walking adjusting mechanism 10, a main box body 20, a measuring mechanism 30, a safety protection mechanism 40, a three-phase power input module 50 and a three-phase power output module 60, wherein the walking adjusting mechanism is arranged below the main box body, and the measuring mechanism, the safety protection mechanism, the three-phase power input module and the three-phase power output module are all arranged in the main box body. The three-phase power input module and the three-phase power output module respectively comprise an upper part and a lower part which are provided with three binding posts, and the upper part and the lower part are separated by an insulating layer.
Referring to fig. 2, the measurement mechanism 30 includes: a three-phase voltage measuring mechanism 31 and a three-phase current measuring mechanism 32. The three-phase voltage measuring mechanism 31 includes: a three-phase voltage measurement output interface 311. The three-phase current measuring mechanism 32 includes: a current sensor 321, a three-phase current measurement output interface 322, a current sensor power supply 323 and a power supply switching row 324.
Referring to fig. 3, the safety protection mechanism 40 includes: three-phase current contactor 41, temperature controller 42, exhaust device 43, contact switch 44, wherein three-phase current contactor is including the input and the output that are equipped with three connecting terminal, and it can be when measuring current surpasss the upper limit in time the circuit plays the guard action.
The connection relationship among the measuring mechanism 30, the safety protection mechanism 40, the three-phase power input module 50 and the three-phase power output module 60 is as follows: the lower part binding post of the three-phase electric input module 50 is respectively connected with the U, V and W three-phase binding posts of the motor controller, the upper part tapping binding post of the three-phase electric input module 50 is connected with the input end of the three-phase current contactor 41 through a connecting copper bar 325, the output end of the three-phase current contactor 41 is connected with the upper part of the three-phase electric output module 60 through a measuring copper bar 326, the lower part of the three-phase electric output module 60 is connected with the U, V and W three-phase binding posts of the motor, three current sensors 321 are arranged, the three current sensors are respectively sleeved on the three measuring copper bars in a stepped mode, an external power supply is connected with the contact switch 44, the external power supply is respectively connected with the current sensor power supply 323, the temperature controller 42 and the exhaust device 43 through a power supply, and the current sensor power supply 323 is respectively connected with the. The three-phase voltage measurement output interface 311 is connected with the three-phase power output module 60. And the three-phase current measurement output interface and the three-phase voltage measurement output interface are respectively connected with the current sensor and the three-phase power output module. The temperature controller 42 is used for sensing the temperature in the box body and is connected with the air exhaust device 43 to control the operation of the air exhaust device.
Referring to fig. 4, the main casing 20 includes: the three-phase voltage measuring device comprises a box body door 21 and a box body 22, wherein a three-phase voltage measuring output port 221, a three-phase current measuring output port 222, a ventilation port and a power supply interface 225 are arranged on the side surface of the box body, and a three-phase power input port 226 and a three-phase power output port 227 are arranged on the bottom surface of the box body. Wherein, the vent includes: air intake 223 and air outlet 224, three-phase voltage measurement delivery outlet, three-phase current measurement delivery outlet and air intake are located the same side of box, and air outlet, power source are located another side of box, and external power source passes through power source and gets into in the box, and power source can be equipped with switch at the power source kneck, and the air outlet is close to exhaust device and sets up. The door lock 211 is arranged on the box body door, the contact switch 44 is arranged at the position where the box body contacts with the box body door, when the box body door is closed, the power supply is switched on, the box body door is opened, and the power supply is switched off. The three-phase voltage measurement output interface and the three-phase current measurement output interface are respectively arranged at the three-phase voltage measurement output port and the three-phase current measurement output port.
Referring to fig. 5, the travel adjustment mechanism 10 includes: a height adjusting mechanism 13, and a base 12 disposed at a lower side of the height adjusting mechanism. The base is provided with universal wheels 11. The height adjustment mechanism includes: a fixing plate 135 and a height adjusting rod, wherein the fixing plate is connected with the main box body. The altitude mixture control pole includes: the inner upright column 134, the outer upright column 133 and the iron pin 131 are arranged in the outer upright column, the iron pin holes 132 are formed in the outer upright column and the inner upright column, the iron pin penetrates through the iron pin holes of the outer upright column and the inner upright column to fix the position of the inner upright column, and the height of the main box body is adjusted by moving the relative position of the inner upright column and the outer upright column.
The embodiment of the utility model provides a measuring device only needs an operator to accomplish at measurement preparation process, and is exemplary, and the operation process who uses this three-phase alternating voltage value and current value measuring device can be as follows:
the three-phase alternating current voltage value and current value measuring device is pushed to one side of the motor test bed, the ground position of the three-phase alternating current voltage value and current value measuring device and the height of the main box body 20 are adjusted according to the positions of the motor controller and the motor, 4 universal wheels are locked, and the position is fixed.
And connecting and fastening U, V and W three-phase alternating current output lines of the motor controller to three binding posts on the lower part of the three-phase electric input module 50 through a three-phase electric input port 226 of the box body 22.
And a U, V and W three-phase alternating current input line of the motor passes through a three-phase power output 227 of the box body 22 to be connected to three binding posts on the lower part of the three-phase power output module 60 and is fastened.
The voltage acquisition interface and the current acquisition interface at the input end of the power analyzer are connected to the three-phase voltage measurement output interface 312 and the three-phase current measurement output interface 322 at the upper left portion of the box 22, respectively.
The cabinet door 21 is closed, the cabinet door lock 211 is locked, the power cord is connected to the 220V power outlet through the power interface 225, and the power switch is turned on. By this, the three-phase alternating voltage value and current value measurement preparation operation is ended.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is:
1. the measuring device provided by the utility model is simple to operate, improves the working efficiency and reduces the labor intensity of operators;
2. the measuring device provided by the utility model is arranged in the box body, can effectively prevent electromagnetic interference, and has high accuracy of measured data;
3. the utility model provides a measuring device, the box door is provided with a contact switch, the box door is opened, the power is automatically cut off, and the safety of personnel is effectively protected;
4. the utility model provides a measuring device, wherein a temperature controller is arranged in a box body, the temperature in the box body is adjustable, and the measuring environment temperature is ensured to meet the measuring requirement;
5. the utility model provides a three-phase current contactor that sets up in the measuring device box can provide overcurrent protection, avoids machine controller and motor circuit to damage.
Above-mentioned all optional technical scheme can adopt arbitrary combination to form the optional embodiment of this utility model, and the repeated description is no longer given here.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. A three-phase ac voltage and current value measuring apparatus, comprising: the three-phase power supply comprises a main box body, and a three-phase power input module, a three-phase power output module, a power switching bar, a current sensor and a three-phase current contactor which are arranged in the main box body; the three-phase power input module is connected with a motor controller, the three-phase power output module is connected with a motor, the three-phase current contactor comprises an input end and an output end which are respectively provided with three connecting terminals, the three-phase power input module is connected with the input end of the three-phase current contactor, the output end of the three-phase current contactor is connected with the three-phase power output module, the current sensor is sleeved on a connecting line of one or more connecting terminals of the output end and the three-phase power output module, and the current sensor and the three-phase power output module are respectively connected with an external power analyzer and used for measuring a voltage value and a current value; the input end of the power supply switching row is connected with an external power supply, and the output end of the power supply switching row is connected with the current sensor.
2. A three-phase ac voltage and current value measuring device according to claim 1, further comprising: and the current sensor power supply is connected between the power switching row and the current sensor and supplies power to the current sensor.
3. A three-phase ac voltage and current value measuring device according to claim 1, further comprising: a three-phase current measurement output interface and a three-phase voltage measurement output interface; the three-phase current measurement output interface is connected with the current sensor, the three-phase voltage output interface is connected with the three-phase power output module, and the power analyzer is connected with the three-phase current measurement output interface and the three-phase voltage measurement output interface.
4. A three-phase ac voltage and current measuring device according to any one of claims 1 to 3, further comprising: the temperature controller is connected with the air exhaust device to control the air exhaust device to operate, and the temperature controller and the air exhaust device are both connected with the power supply switching row.
5. A three-phase ac voltage and current measuring device according to any one of claims 1 to 3, further comprising: and one end of the contact switch is connected with an external power supply, and the other end of the contact switch is connected with the power supply switching bar.
6. A three-phase ac voltage and current measuring apparatus according to any one of claims 1 to 3, wherein the main casing includes: the box body side face is provided with a three-phase voltage measuring output port, a three-phase current measuring output port, a power supply interface and a ventilation opening, and the bottom of the box body is provided with a three-phase power input port and a three-phase power output port.
7. A three-phase ac voltage and current measuring device according to any one of claims 1 to 3, further comprising: the walking adjustment mechanism, walking adjustment mechanism includes: the height adjusting mechanism and the base are arranged on the lower side of the height adjusting mechanism; be equipped with the universal wheel on the base, height adjusting mechanism includes: the height adjusting device comprises a fixing plate and a height adjusting rod, wherein the fixing plate is connected with the main box body.
8. The apparatus for measuring voltage and current values of three-phase ac of claim 7, wherein the height adjusting lever comprises: the inner column is arranged in the outer column, the outer column and the inner column are respectively provided with an iron pin hole, and the iron pin simultaneously penetrates through the outer column and the iron pin hole of the inner column to be fixed at the position of the inner column.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921697682.0U CN211426715U (en) | 2019-10-11 | 2019-10-11 | Three-phase alternating voltage value and current value measuring device |
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| CN201921697682.0U CN211426715U (en) | 2019-10-11 | 2019-10-11 | Three-phase alternating voltage value and current value measuring device |
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| CN211426715U true CN211426715U (en) | 2020-09-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180144A (en) * | 2020-09-25 | 2021-01-05 | 东风汽车集团有限公司 | Motor three-phase current waveform acquisition device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180144A (en) * | 2020-09-25 | 2021-01-05 | 东风汽车集团有限公司 | Motor three-phase current waveform acquisition device |
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