CN212905171U - Detection tool for phase sequence of stator winding of three-phase motor - Google Patents
Detection tool for phase sequence of stator winding of three-phase motor Download PDFInfo
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- CN212905171U CN212905171U CN202021445082.8U CN202021445082U CN212905171U CN 212905171 U CN212905171 U CN 212905171U CN 202021445082 U CN202021445082 U CN 202021445082U CN 212905171 U CN212905171 U CN 212905171U
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Abstract
The utility model discloses a detection tool for the phase sequence of a three-phase motor stator winding, which comprises three wiring terminals, a power supply, a self-reset button and a pointer type direct current ammeter; the first connecting terminal is connected with the power supply and the self-resetting button in series; the second connecting terminal is connected with the pointer type DC ammeter in series; whether the phase sequence of the stator winding outgoing lines of the three-phase motor is a positive phase sequence or not is judged by observing the deflection condition of a pointer type direct current ammeter of the detection tool. The utility model discloses simple structure only adopts a pointer DC ammeter, and the pointer that convenience of customers observed the ampere meter more deflects the condition, simultaneously, the utility model discloses a from reset button for it is more convenient to detect the instrument operation.
Description
Technical Field
The utility model relates to an urban rail transit vehicle overhauls the field, especially relates to a detection instrument of three phase motor stator winding phase sequence.
Background
In an auxiliary power supply system of a passenger train, a fan type three-phase small-sized motor (7.5KW or below) controlled by three-phase alternating current (3 phases 380V) is adopted in many devices. In daily maintenance and replacement, the steering of newly installed three-phase motor equipment during working is required to be ensured to be the same as the design requirement.
The three-phase motor type equipment is most in the train air conditioner system, and a ventilation fan and a condensation fan of the air conditioner system are driven by three-phase asynchronous motors, so that the air conditioner system works abnormally and the comfort level of passengers is influenced if the rotation direction of the motor is not consistent with the design requirement. When a daily vehicle maintainer overhauls and replaces a fan motor, the old motor with a fault is firstly detached, and then a new motor (or a repair part) with the same model is replaced. After the new motor is installed, in order to ensure that the steering of the newly installed three-phase motor is consistent with the steering of the original replaced old motor, a maintainer needs to lift the train to the pantograph, obtain a DC1500V power supply from a contact network, supply an AC400V power supply after the train auxiliary inverter is started, start an air conditioner control system to enable a fan to work, and then climb onto the roof to confirm the steering of the fan. However, this behavior violates the safety regulations of the related maintenance work of the vehicle company, and also brings inconvenience to the actual operation and the observation and steering.
According to the motor principle, the motor output direction of the three-phase motor not only depends on the phase sequence of the three-phase outgoing lines of the three-phase stator winding of the motor, but also depends on the phase sequence of the motor connected with a power supply, and any two phases can be reversed by interchanging.
The three-phase power supply of the three-phase motor is supplied to the input end of an electric protection device in a vehicle passenger room equipment cabinet by a train auxiliary inverter and then is connected into a fan junction box in a roof air-conditioning assembly through a related multi-stage middle terminal. Even if the new motor (or the repaired part) is subjected to power-on test in the overhaul warehouse for confirmation steering before loading, the phase sequence of the test power supply cannot be completely the same as that of the related overhaul positions on the train, so that the phase sequence of the three-phase outgoing line of the stator winding of the new motor cannot be ensured to be the same as that of the old motor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a detection instrument of three phase motor stator winding phase sequence through the pointer direction of deflection process of observation detection instrument's pointer DC ammeter to judge that the stator winding lead-out wire phase sequence of new three phase motor is positive phase sequence or phase reversal order, make the phase sequence of the stator winding lead-out wire of new motor satisfy the requirement that turns to that former motor needs.
In order to achieve the purpose, the utility model provides a detection tool for the phase sequence of a three-phase motor stator winding, which comprises three wiring terminals, a power supply, a self-reset button and a pointer type direct current ammeter; the first connecting terminal is connected with the power supply and the self-resetting button in series; and the second connecting terminal is connected with the pointer type DC ammeter in series.
Preferably, the first connection terminal is connected to the positive pole of the power supply.
Preferably, the second connection terminal is connected with the positive pole of the pointer type direct current ammeter.
Preferably, the third connection terminal is connected with the negative pole of the pointer type direct current ammeter.
Preferably, one end of the self-reset button is connected with the negative electrode of the power supply, and the other end of the self-reset button is connected with the negative electrode of the pointer type direct current ammeter.
The self-reset button is used for connecting the detection tool and ensuring that the detection tool can be timely disconnected after the pointer type DC ammeter deflects.
The utility model has the advantages of it is following:
the utility model provides a three-phase motor stator winding phase sequence's detection instrument, through observing the pointer deflection condition of pointer type direct current ampere meter of detection instrument to judge whether three-phase motor's stator winding lead-out wire phase sequence order is positive phase sequence; the utility model provides a detection instrument only adopts a pointer DC ammeter, and convenience of customers observes the pointer condition of deflecting of ampere meter more, simultaneously, the utility model discloses a from reset button for it is more convenient to detect the instrument operation. The utility model discloses simple structure, convenient operation, the phase sequence of the stator winding of the three-phase motor of judgement that can be quick, accurate.
Drawings
Fig. 1 is a circuit diagram of a detection tool for phase sequence of stator windings of a three-phase motor according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of the detection tool for the phase sequence of the stator winding of the three-phase motor provided by the embodiment of the utility model and the outgoing line of the stator winding of the three-phase motor.
Detailed Description
The following describes the detection tool for the phase sequence of the stator winding of the three-phase motor in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It is to be noted that the drawings are in a very simplified form and are not to be construed as precise ratios as are merely intended to facilitate and distinctly illustrate the embodiments of the present invention.
Fig. 1 shows a tool for detecting a phase sequence of a stator winding of a three-phase motor, which comprises three connecting terminals, a power supply 2, a self-reset button 3 and a pointer type dc current meter 4; the first connecting terminal 11 is connected with the power supply 2 and the self-reset button 3 in series; the second connecting terminal 12 is connected in series with the pointer dc current meter 4.
The first connecting terminal 11 is connected with the positive pole of the power supply 2; the second connecting terminal 12 is connected with the anode of the pointer type DC ammeter 4; the third connecting terminal 13 is connected with the negative electrode of the pointer type DC ammeter 4; one end of the self-reset button 3 is connected with the negative electrode of the power supply 2, and the other end of the self-reset button is connected with the negative electrode of the pointer type DC ammeter 4.
The lead-out wire of the first connecting terminal 11 is yellow, the lead-out wire of the second connecting terminal 12 is green, and the lead-out wire of the third connecting terminal 13 is red.
The power supply 2 is a dry battery. The self-reset button 3 is a switch capable of automatically resetting, when the button is manually pressed, the initial state of the contact position in the self-reset button 3 is instantaneously changed, and a detection tool is switched on; when the button is manually loosened, the contact position is automatically reset, and the detection tool is disconnected, so that the detection tool is more convenient to operate.
The pointer type DC ammeter 4 is provided with a pointer deflection original position, the detection tool is connected after three terminals of the detection tool are connected with each other, and the pointer deflection position of the pointer type DC ammeter 4 is the pointer deflection original position of the pointer type DC ammeter 4. The pointer deflection home bit of the pointer dc current meter 4 is related to the resistance value of the motor stator winding and the magnitude of the power supply voltage.
The three-phase motor stator winding phase sequence detection tool is connected with a stator winding outgoing line in a motor junction box of the motor, and the three wiring terminals are respectively connected with three stator winding outgoing lines in the motor junction box. The detection tool and the stator winding of the motor form a closed loop, the current condition in the stator winding can be visually displayed by observing the deflection condition of a pointer type direct current ammeter in the detection tool, and therefore the phase sequence of the stator winding of the motor can be known according to the electromagnetism principle.
The utility model is used for detect three phase motor stator winding phase sequence's theory of operation does:
three wiring terminals of the detection tool are respectively connected with three stator winding outgoing lines in a motor wiring box, as shown in fig. 2, a first wiring terminal 11 is connected with a first stator winding outgoing line of a three-phase motor stator winding, a second wiring terminal 12 is connected with a second stator winding outgoing line of the three-phase motor stator winding, and a third wiring terminal 13 is connected with a third stator winding outgoing line of the three-phase motor stator winding; after the stator windings of the three-phase motor are connected with the detection tool, the stator windings of the three-phase motor are equivalent to a closed-loop coil, the self-reset button 3 is pressed down, the circuit is switched on, at the moment, currents are all arranged in the three stator windings of the three-phase motor, the three stator windings respectively generate magnetic fields with different angles and are fully distributed in the space of the stator; because the rotor is arranged in the cavity of the stator, when the motor is used, the magnetic field intensity generated by the rotor winding is enhanced, the magnetic flux in the stator winding is reduced, an induced electromotive force for preventing the magnetic flux from being reduced is generated in the stator winding, and the pointer type DC current meter 4 connected to the head end of the stator winding is deflected at the original position; along with the speed that the motor rotated slows down until stopping, the pointer dc ammeter 4 takes place to deflect to the opposite direction after deflecting to a certain degree, and return to original position again after deflecting to a certain degree, and pointer dc ammeter 4's deflection condition promptly divides into two kinds: 1. deflecting reversely from an original position, deflecting to a certain position, deflecting forwards, and finally returning to the original position; 2. deflecting from the original position in the forward direction, deflecting to a certain position, deflecting in the reverse direction, and finally returning to the original position; when the motor rotates clockwise, and the deflection condition of the pointer type DC ammeter 4 is the first, the three stator winding leading-out wires of the three-phase motor are corresponding to the U1, V1 and W1 ends of the stator windings of the three-phase motor respectively, namely the phase sequence of the stator windings of the three-phase motor is positive phase sequence; when the pointer deflection of the pointer dc current meter 4 is the second type, the phase sequence of the stator winding of the three-phase motor is the reverse phase sequence.
The utility model provides a three-phase motor stator winding phase sequence's detection instrument, through observing the pointer deflection condition of pointer type direct current ampere meter of detection instrument to judge whether three-phase motor's stator winding lead-out wire phase sequence order is positive phase sequence; the utility model provides a detection instrument only adopts a pointer DC ammeter, and convenience of customers observes the pointer condition of deflecting of ampere meter more, simultaneously, the utility model discloses a from reset button for it is more convenient to detect the instrument operation. The utility model discloses simple structure, convenient operation, the phase sequence of the stator winding of the three-phase motor of judgement that can be quick, accurate.
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (2)
1. A tool for detecting the phase sequence of the stator winding of a three-phase motor, comprising: the three-phase alternating current power supply comprises three wiring terminals, a power supply (2), a self-reset button (3) and a pointer type direct current ammeter (4); the three connecting terminals comprise a first connecting terminal (11), a second connecting terminal (12) and a third connecting terminal (13); the first connecting terminal (11) is connected with the power supply (2) and the self-reset button (3) in series; the second connecting terminal (12) is connected with the pointer type direct current ammeter (4) in series; the first connecting terminal (11) is connected with the positive pole of the power supply (2); the second connecting terminal (12) is connected with the anode of the pointer type direct current ammeter (4); and the third connecting terminal (13) is connected with the negative electrode of the pointer type direct current ammeter (4).
2. The tool for detecting the phase sequence of the stator windings of a three-phase motor as claimed in claim 1, characterized in that the self-reset button (3) is connected with the negative pole of the power supply (2) at one end and with the negative pole of the pointer type DC ammeter (4) at the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021445082.8U CN212905171U (en) | 2020-07-21 | 2020-07-21 | Detection tool for phase sequence of stator winding of three-phase motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021445082.8U CN212905171U (en) | 2020-07-21 | 2020-07-21 | Detection tool for phase sequence of stator winding of three-phase motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212905171U true CN212905171U (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021445082.8U Active CN212905171U (en) | 2020-07-21 | 2020-07-21 | Detection tool for phase sequence of stator winding of three-phase motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212905171U (en) |
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2020
- 2020-07-21 CN CN202021445082.8U patent/CN212905171U/en active Active
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