CN211979176U - Detection circuit for homonymous terminals of three-phase alternating current motor winding - Google Patents
Detection circuit for homonymous terminals of three-phase alternating current motor winding Download PDFInfo
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- CN211979176U CN211979176U CN202020286497.9U CN202020286497U CN211979176U CN 211979176 U CN211979176 U CN 211979176U CN 202020286497 U CN202020286497 U CN 202020286497U CN 211979176 U CN211979176 U CN 211979176U
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Abstract
The utility model provides a detection circuitry of three-phase alternating current motor winding dotted terminal, including power G1, air switch QF, trigger button SB1, change over switch SS, emitting diode H1, emitting diode H2, integrated amplifier, power G1 anodal is connected with air switch QF one end, the air switch QF other end is connected with integrated amplifier, power G1 negative pole is connected with integrated amplifier, trigger button SB1 one end, change over switch SS one end is connected with three-phase alternating current motor winding one end respectively, the circuit can be through carrying out the pulse pressurization respectively to two-phase winding with change over switch, the induced voltage (microvolt-millivolt) generated in the two-phase winding is amplified by an adjustable amplifier (1-1000 times) and then directly drives two light-emitting diodes with opposite polarities to obtain different light-emitting states (red first and green second or green first and red second) with reversed polarities, and then the dotted end of the winding is judged according to the same light-emitting state.
Description
Technical Field
The utility model relates to a detection circuitry of three-phase alternating current motor winding dotted terminal.
Background
When the three-phase alternating current motor is overhauled, the homonymous ends of the motor windings are generally required to be checked, or the homonymous ends are required to be found again under the conditions of motor burning, rewinding, checking and accepting, motor running lead burning, motor disconnection without marking, wire number head loss and the like, random connection cannot be realized, and if the connection is incorrect, a short circuit accident is easily caused. At present, the main method for the new motor is mainly to use a pointer type universal meter (the meter is not used in many units and fields) and a battery to measure induced potential to determine the same-name end of a three-phase asynchronous motor, the problems that the judgment of the existing digital universal meter and a dry battery method is just opposite to the judgment standard of the pointer type universal meter are easily caused by misjudgment, and a universal meter short circuit method (so called a remanence method) can be used for the old motor.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a detection circuitry of three-phase alternating current motor winding dotted terminal.
The utility model discloses a following technical scheme can realize.
The utility model provides a pair of detection circuitry of three-phase alternating current motor winding dotted terminal, including power G1, air switch QF, trigger button SB1, change over switch SS, emitting diode H1, emitting diode H2, integrated amplifier, power G1 is anodal to be connected with air switch QF one end, the air switch QF other end is connected with integrated amplifier, power G1 negative pole is connected with integrated amplifier, trigger button SB1 one end, change over switch SS one end is connected with three-phase alternating current motor winding one end respectively, the trigger button SB1 other end, the change over switch SS other end, the three-phase alternating current motor winding other end is connected with integrated amplifier respectively, emitting diode H1 both ends are connected with integrated amplifier, emitting diode H2 is parallelly connected with emitting diode H1 both ends.
And the pin 2 and the pin 7 of the integrated amplifier are in short circuit.
One end of the trigger button SB1 is connected with one end of a U-phase of the three-phase alternating current motor, and the other end of the trigger button SB1 is connected with an 8-pin of the integrated amplifier.
One end of the change-over switch SS is connected with one end of a V phase and one end of a W phase of the three-phase alternating current motor respectively, and the other end of the change-over switch SS is connected with a pin 1 of the integrated amplifier.
And the cathode and the anode of the light-emitting diode H1 are respectively connected with the pins 5 and 6 of the integrated amplifier.
And the anode and the cathode of the light-emitting diode H2 are respectively connected with the pins 5 and 6 of the integrated amplifier.
The light emitting diode H1 is red; the light emitting diode H2 is green.
The integrated amplifier model is AD 620.
The beneficial effects of the utility model reside in that: the state of the two-phase winding can be obtained once by using one power supply and a change-over switch for triggering a motor loop, so that the test steps are simplified, the loop is optimized, and the amplifier and the motor trigger to share one power supply, so that the loop is simplified; the integrated amplifier module has adjustable multiple, and is provided with output overvoltage locking protection and stable output direct current voltage. The integrated amplifier module and the LED are low in price and cost, and the polarity of the LED lamp is judged according to the flashing state of the LED lamp, so that the LED lamp is more visual and accurate.
The circuit can use the change-over switch to respectively carry out pulse pressurization on the two-phase windings, and the induced voltage (microvolt-millivolt) generated in the two-phase windings is amplified by an adjustable amplifier (1-1000 times) and then directly drives two light-emitting diodes with opposite polarities to obtain different light-emitting states (red first and green second or green first and red second) with reversed polarities. And judging the homonymous terminal of the winding according to the same luminous state.
Drawings
Fig. 1 is a schematic diagram of the junction circuit of the present invention.
Fig. 2 is a schematic diagram of the connection terminal of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
A detection circuit for the homonymous ends of three-phase alternating current motor windings comprises a power supply G1, an air switch QF, a trigger button SB1, a change-over switch SS, a light emitting diode H1, a light emitting diode H2 and an integrated amplifier, wherein the positive electrode of the power supply G1 is connected with one end of the air switch QF, the other end of the air switch QF is connected with the integrated amplifier, the negative electrode of the power supply G1 is connected with the integrated amplifier, one end of the trigger button SB1 and one end of the change-over switch SS are respectively connected with one end of the three-phase alternating current motor windings, the other end of the trigger button SB1, the other end of the change-over switch SS and the other end of the three-phase alternating current motor windings are respectively connected with the integrated amplifier, two ends of a light.
The pin 2 of the integrated amplifier is short-circuited with the pin 7.
One end of a trigger button SB1 is connected with one end of a U-phase of the three-phase alternating current motor, and the other end of the trigger button SB1 is connected with a pin 8 of the integrated amplifier; one end of a change-over switch SS is respectively connected with one end of a V phase and one end of a W phase of the three-phase alternating current motor, and the other end of the change-over switch SS is connected with a pin 1 of the integrated amplifier.
The cathode and the anode of the light-emitting diode H1 are respectively connected with the pins 5 and 6 of the integrated amplifier; the anode and the cathode of the light-emitting diode H2 are respectively connected with the pins 5 and 6 of the integrated amplifier, and the light-emitting diode H1 is red; led H2 is green and the integrated amplifier model is AD 620.
The working process of the circuit is as follows:
1.1, judging 6 end heads of a winding of the motor by using a resistance gear of a universal meter (the resistance is displayed as two ends of a same-phase winding, and the resistance is infinite and is not in phase), and respectively finding out a U phase, a V phase and a W phase of the motor, wherein the temporary serial numbers are U1, U2, V1, V2, W1 and W2 ends;
1.2, rotating the multiple of the amplifier to the minimum multiple in the anticlockwise direction to protect the amplifier;
1.3, wiring is performed according to the circuit diagram of the figure 1.
2. Test steps and principles:
2.1, verify circuit correct, confirm the change-over switch is in the V phase, close the power switch QF, and then adjust the amplification knob of the amplifier to maximum (the amplifier is protected and will remain when the amplification factor is exceeded).
2.2, when the switch of SB1 is pressed to turn on, the battery charges the U-phase winding, and when a magnetic field is generated, a voltage is induced in the V-phase winding (this voltage varies according to the motor capacity, a small-capacity motor is tens of mV, a large-capacity motor is hundreds of mV), at this time, an induced voltage signal is sent to the amplifier through the S + and S-signal input end in the V-phase winding, the amplifier amplifies the mV voltage and outputs it at Vout, and the GND terminal has an output (for example, when the amplifier operates, the input voltage is multiplied by a multiple of 30mV 1000=30V, and when the voltage is higher than 9V, the voltage of 9V is locked out), at this time, a single red or green diode connected to the output terminal is turned on and flickers to light, when the switch is turned off, according to the electromagnetic induction principle, the voltage at this time cannot be maintained, because the voltage induced by the motor winding immediately generates a reverse magnetic flux, the voltage at Vin end will have reversed polarity, and the voltage amplified by amplifier will make the non-lighted diode light up for several seconds (the length is related to the coil capacity). The operating state of the LED lamp observed by pressing the button has two types:
a. firstly, flashing a green light, and then continuously flashing a red light for a plurality of seconds;
b. the red light flashes first and then green etc. for a few seconds.
2.3, turning the change-over switch to perform the same test operation on the W phase of the winding, and pressing the SB1 button can also obtain the state that the LED lamp is flashing. If the flashing state is the same as V (V, W are both red first then green or green first then red), it is proved that the assumed V1, W1 of the wiring is the end of the same name, and the loop is not replaced. If the flashing states are opposite (V is green first and then red, W is red first and then green), the assumed V1 and W1 of the connection wire are non-homonymous terminals, and any one of the V phase and the W phase is connected in a reverse mode, namely the homonymous terminals are connected, so that the homonymous terminals of the third phase winding can be conveniently judged.
And 2.4, after the same-name end marks are made, exchanging the windings U and V again, using the V phase as a circuit trigger winding, using the windings of the U phase and the W phase as induction windings, accessing a wiring terminal, turning on a change-over switch at the position of the U phase as shown in a wiring diagram of fig. 2, triggering a button again, recording the display state of the LED lamp, and when the display is the same as the flashing state of the previous V phase and the W phase (if the states are different, connecting the windings of the U phase in a reverse mode), taking the upper end of the winding of U, V, W as the same-name end.
Claims (8)
1. The utility model provides a detection circuitry of three-phase alternating current motor winding dotted terminal, includes power G1, air switch QF, trigger button SB1, change over switch SS, emitting diode H1, emitting diode H2, integrated amplifier which characterized in that: the positive electrode of a power supply G1 is connected with one end of an air switch QF, the other end of the air switch QF is connected with an integrated amplifier, the negative electrode of the power supply G1 is connected with the integrated amplifier, one end of a trigger button SB1 and one end of a change-over switch SS are respectively connected with one end of a three-phase alternating current motor winding, the other end of a trigger button SB1, the other end of the change-over switch SS and the other end of the three-phase alternating current motor winding are respectively connected with the integrated amplifier, two ends of a light-emitting diode H1 are connected with the integrated amplifier, and two ends of.
2. The detection circuit for the dotted terminals of a three-phase alternating current motor winding of claim 1, wherein: and the pin 2 and the pin 7 of the integrated amplifier are in short circuit.
3. The detection circuit for the dotted terminals of a three-phase alternating current motor winding of claim 1, wherein: one end of the trigger button SB1 is connected with one end of a U-phase of the three-phase alternating current motor, and the other end of the trigger button SB1 is connected with an 8-pin of the integrated amplifier.
4. The detection circuit for the dotted terminals of a three-phase alternating current motor winding of claim 1, wherein: one end of the change-over switch SS is connected with one end of a V phase and one end of a W phase of the three-phase alternating current motor respectively, and the other end of the change-over switch SS is connected with a pin 1 of the integrated amplifier.
5. The detection circuit for the dotted terminals of a three-phase alternating current motor winding of claim 1, wherein: and the cathode and the anode of the light-emitting diode H1 are respectively connected with the pins 5 and 6 of the integrated amplifier.
6. The detection circuit for the dotted terminals of a three-phase alternating current motor winding of claim 1, wherein: and the anode and the cathode of the light-emitting diode H2 are respectively connected with the pins 5 and 6 of the integrated amplifier.
7. The detection circuit for the dotted terminals of a three-phase alternating current motor winding of claim 1, wherein: the light emitting diode H1 is red; the light emitting diode H2 is green.
8. A circuit for detecting the dotted terminals of a three-phase ac motor winding as claimed in claim 2, wherein: the integrated amplifier model is AD 620.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020286497.9U CN211979176U (en) | 2020-03-10 | 2020-03-10 | Detection circuit for homonymous terminals of three-phase alternating current motor winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020286497.9U CN211979176U (en) | 2020-03-10 | 2020-03-10 | Detection circuit for homonymous terminals of three-phase alternating current motor winding |
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| CN211979176U true CN211979176U (en) | 2020-11-20 |
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| CN202020286497.9U Active CN211979176U (en) | 2020-03-10 | 2020-03-10 | Detection circuit for homonymous terminals of three-phase alternating current motor winding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848526A (en) * | 2021-09-18 | 2021-12-28 | 深圳供电局有限公司 | Voltage transformer loop detection method, system, equipment and storage medium |
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2020
- 2020-03-10 CN CN202020286497.9U patent/CN211979176U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848526A (en) * | 2021-09-18 | 2021-12-28 | 深圳供电局有限公司 | Voltage transformer loop detection method, system, equipment and storage medium |
| CN113848526B (en) * | 2021-09-18 | 2024-03-12 | 深圳供电局有限公司 | Voltage transformer loop detection method, system, equipment and storage medium |
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