CN111650439A - Rotor winding alternating current impedance detection circuit and device - Google Patents
Rotor winding alternating current impedance detection circuit and device Download PDFInfo
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- CN111650439A CN111650439A CN202010485778.1A CN202010485778A CN111650439A CN 111650439 A CN111650439 A CN 111650439A CN 202010485778 A CN202010485778 A CN 202010485778A CN 111650439 A CN111650439 A CN 111650439A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a rotor winding alternating current impedance detection circuit, which comprises: the device comprises a current sampling circuit, a voltage sampling circuit, an analog-to-digital conversion circuit, a rotating speed sampling circuit and a microprocessor. The embodiment of the invention can solve the problem that the conventional rotor winding alternating current impedance testing device does not have continuous impedance continuous detection capability through the circuit, meets related requirements, can realize miniaturized design and is convenient for field use of testers.
Description
Technical Field
The invention relates to the field of power generation and correlation, in particular to a rotor winding alternating current impedance detection circuit and device.
Background
A non-salient pole type rotor synchronous generator, referred to as a non-salient pole generator for short, is the most common generator type in the power industry. However, due to the manufacturing process, transportation and storage, operation and maintenance and other reasons of the non-salient pole generator, the rotor winding may have turn-to-turn short circuit in the operation process, and further other faults such as unit vibration, rotor body magnetization and the like occur.
Turn-to-turn short circuits, not permanent, metallic, of the rotor windings of partial non-salient pole generators occur only under certain operating conditions, such as within a certain speed range. And the conventional testing means is difficult to detect the dynamic turn-to-turn short circuit of the rotor winding of the non-salient pole generator, when the non-salient pole generator breaks down, the non-salient pole generator can only be transported back to a manufacturing plant for detection, the period is long, the cost is high, and the requirement of a user field test cannot be met.
Disclosure of Invention
The embodiment of the invention provides an interface circuit, which aims to solve the problem that the short circuit of the number of dynamic turns of a rotor winding of a non-salient pole generator is difficult to detect in the prior art.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, the present invention provides a rotor winding ac impedance detection circuit, including: the device comprises a current sampling circuit, a voltage sampling circuit, an analog-to-digital conversion circuit, a rotating speed sampling circuit and a microprocessor;
the input end of the current sampling circuit is connected with the rotor winding in series, and the current sampling circuit collects the current of the rotor winding;
the input end of the voltage sampling circuit is connected with the rotor winding in parallel, and the voltage sampling circuit collects the voltage of the rotor winding;
the input end of the analog-to-digital conversion circuit is respectively connected with the output end of the current sampling circuit and the output end of the voltage sampling circuit, and the analog-to-digital conversion circuit converts the current analog quantity acquired by the current sampling circuit and the voltage analog quantity acquired by the voltage sampling circuit into digital signals;
the rotating speed sampling circuit is used for acquiring a rotating speed pulse signal of a speed measuring gear of the rotor;
the input end of the microprocessor is respectively connected with the output end of the analog-to-digital conversion circuit and the output end of the rotating speed sampling circuit, the output end of the microprocessor is connected with the output terminal of the detection circuit, and the microprocessor respectively processes the current signal and the voltage signal output by the analog-to-digital conversion circuit and the rotating speed signal output by the rotating speed sampling circuit and outputs data through the output terminal.
In a second aspect, the present invention also provides a rotor winding ac impedance detection apparatus, including: the accommodating box is provided with a handle, a circuit board is arranged in the accommodating box, and the circuit board is provided with the detection circuit.
In the embodiment of the invention, firstly, the analog-to-digital conversion circuit converts the current of the rotor winding acquired by the current sampling circuit and the voltage of the rotor winding acquired by the voltage acquisition circuit into digital signals, then the digital signals and the rotating speed pulse signals of the speed measuring gear of the rotor acquired by the rotating speed sampling circuit are processed and output by the microprocessor, and the change state of the alternating current impedance of the rotor winding can be detected through the change of the data, so that the problem of the existence of the dynamic turn-to-turn short circuit can be detected. The embodiment of the invention can solve the problem that the conventional rotor winding alternating current impedance testing device does not have continuous impedance continuous detection capability through the circuit, meets related requirements, can realize miniaturized design and is convenient for field use of testers.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a block diagram of a rotor winding ac impedance detection circuit according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a current sampling circuit according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a voltage sampling circuit according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of a rotational speed sampling circuit according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a rotor winding ac impedance detection circuit according to an embodiment of the present invention.
Wherein, R1 is a first resistor; r2 is a second resistor; r3 is a third resistor; r4 is a fourth resistor; r5 is a fifth resistor; r6 is a sixth resistor; r7 is a seventh resistor; r8 is an eighth resistor; r9 is a ninth resistor; c1 is a first capacitor; c2 is a second capacitor; c3 is a third capacitor; c4 is a fourth capacitor; c5 is a fifth capacitor; c6 is a sixth capacitor; c7 is a seventh capacitor; TA is a current transformer; u1 is a first amplifier; the TV is a voltage transformer; u2 is a second amplifier; u3 is a trigger; and S is a magnetoelectric rotation speed sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a rotor winding alternating current impedance detection circuit and a rotor winding alternating current impedance detection device, which realize dynamic continuous detection of rotor winding alternating current impedance in the process of increasing/decreasing the rotating speed of a generator, have the functions of real-time display and storage (such as an industrial grade SD card) and output (such as a USB2.0 interface), allow for consulting and deriving test historical data, such as impedance curves continuously measured at different rotating speeds and voltage, current and impedance values corresponding to each rotating speed point on the curves, solve the problem that a conventional rotor winding alternating current impedance testing device does not have continuous impedance continuous detection capability, meet the existing related requirements, simultaneously realize miniaturization design and facilitate field use of testers.
Fig. 1 is a block diagram of a rotor winding ac impedance detection circuit according to an embodiment of the present invention. As shown, the rotor winding ac impedance detection circuit may include: the device comprises a current sampling circuit, a voltage sampling circuit, an analog-to-digital conversion circuit, a rotating speed sampling circuit and a microprocessor.
The input end of the current sampling circuit is connected with the rotor winding in series, and the current sampling circuit collects the current of the rotor winding. The input end of the voltage sampling circuit is connected with the rotor winding in parallel, and the voltage sampling circuit collects the voltage of the rotor winding. The input end of the analog-to-digital conversion circuit is respectively connected with the output end of the current sampling circuit and the output end of the voltage sampling circuit, and the analog-to-digital conversion circuit converts the current analog quantity acquired by the current sampling circuit and the voltage analog quantity acquired by the voltage sampling circuit into digital signals. The rotating speed sampling circuit is used for acquiring a rotating speed pulse signal of a speed measuring gear of the rotor. The input end of the microprocessor is respectively connected with the output end of the analog-to-digital conversion circuit and the output end of the rotating speed sampling circuit, the output end of the microprocessor is connected with the output terminal of the detection circuit, and the microprocessor respectively processes the current signal and the voltage signal output by the analog-to-digital conversion circuit and the rotating speed signal output by the rotating speed sampling circuit and outputs all data through the output terminal.
In the embodiment of the invention, firstly, the analog-to-digital conversion circuit converts the current of the rotor winding acquired by the current sampling circuit and the voltage of the rotor winding acquired by the voltage acquisition circuit into digital signals, then the digital signals and the rotating speed pulse signals of the speed measuring gear of the rotor acquired by the rotating speed sampling circuit are processed and output by the microprocessor, and the change state of the alternating current impedance of the rotor winding can be detected through the change of the data, so that the problem of the existence of the dynamic turn-to-turn short circuit can be detected. The embodiment of the invention can solve the problem that the conventional rotor winding alternating current impedance testing device does not have continuous impedance continuous detection capability through the circuit, meets related requirements, can realize miniaturized design and is convenient for field use of testers.
In one possible implementation manner of the present invention, as shown in fig. 2, a circuit diagram of a current sampling circuit is provided in an embodiment of the present invention. As shown, the current sampling circuit may include: the circuit comprises a current transformer TA, a filter circuit, a first amplifier U1, a third resistor R3, a second capacitor C2, a third capacitor C3 and a fourth resistor R4.
Specifically, the input end of a current transformer TA is connected with the rotor winding, and the output end of the current transformer TA is connected with the filter circuit; the specific connection relationship between the current transformer TA and the rotor winding is that an excitation loop conductor of the rotor winding passes through a hole in the middle of the current transformer TA.
The non-inverting input end of a first amplifier U1 is connected with the filter circuit, the inverting input end of the first amplifier U1 is connected with the first end of a third resistor R3, the positive power supply input end of the first amplifier U1 is respectively connected with a positive power supply terminal and the first end of a second capacitor C2, the negative power supply input end of a first amplifier U1 is respectively connected with a negative power supply terminal and the first end of a third capacitor C3, and the output end of the first amplifier U1 is respectively connected with the second end of the third resistor R3, the first end of a fourth resistor R4 and the input end of the analog-to-digital conversion circuit;
the second terminal of the second capacitor C2, the second terminal of the third capacitor C3 and the second terminal of the fourth resistor R4 are all grounded.
The positive power supply terminal and the negative terminal can be externally connected with a power supply, and can also be connected with a power supply circuit in the detection circuit to supply power for the current sampling circuit. The value of the external power source may be determined according to the actual condition of the circuit, for example, 15V, 12V, and the like, and is not limited herein.
In the embodiment of the present invention, the current sampling circuit is used to collect the current of the rotor winding, and in other embodiments, other current sampling circuits may be used as long as they can collect the current of the rotor winding.
In the embodiment of the invention, the current transformer TA outputs a current signal, converts the current signal into a voltage signal through a resistor, and then is subjected to isolation following by the first amplifier U1 and input into the analog-to-digital conversion circuit.
In one possible embodiment of the present invention, the filter circuit may include: a first resistor R1, a second resistor R2 and a first capacitor C1.
Specifically, a first end of the first resistor R1 is connected to a first end of the current transformer TA and a first end of the second resistor R2, respectively, and a second end of the first resistor R1 is connected to a second end of the current transformer TA and a first end of the first capacitor C1, respectively. A second terminal of the second resistor R2 is connected to a second terminal of the first capacitor C1 and a non-inverting input terminal of the first amplifier U1, respectively. A first terminal of the first resistor R1 is connected to ground.
In the embodiment of the present invention, the filtering circuit is used for filtering, and in other embodiments, other filtering circuits may be used as long as they can perform the function of filtering for the current transformer TA.
In one possible implementation manner of the present invention, as shown in fig. 3, a circuit diagram of a voltage sampling circuit is provided in an embodiment of the present invention. As shown, the voltage sampling circuit may include: the circuit comprises a voltage transformer TV, a second amplifier U2, an eighth resistor R8, a fourth capacitor C4, a fifth resistor R5, a sixth resistor R6, a fifth capacitor C5, a seventh resistor R7, a sixth capacitor C6, a seventh capacitor C7 and a ninth resistor R9.
Specifically, an input end of the voltage transformer TV is connected to the rotor winding through an eighth resistor R8, a first output end of the voltage transformer TV is connected to a first end of a fourth capacitor C4, a first end of a sixth resistor R6, a first end of a fifth capacitor C5, and an inverting input end of a second amplifier U2, respectively, and a second output end of the voltage transformer TV is grounded. A second terminal of the sixth resistor R6 is connected to a first terminal of the fifth resistor R5. A second terminal of the fifth capacitor C5 is connected to a first terminal of a seventh resistor R7. The non-inverting input end of the second amplifier U2 is grounded, the positive power input end of the second amplifier U2 is connected to the positive power terminal and the first end of the sixth capacitor C6, the negative power input end of the second amplifier U2 is connected to the negative power terminal and the first end of the seventh capacitor C7, and the output end of the second amplifier U2 is connected to the second end of the fourth capacitor C4, the second end of the fifth resistor R5, the second end of the seventh resistor R7, and the first end of the ninth resistor R9. The second terminal of the sixth capacitor C6 and the second terminal of the seventh capacitor C7 are both grounded. A second terminal of the ninth resistor R9 is connected to an input terminal of the analog-to-digital conversion circuit.
The positive power supply terminal and the negative terminal can be externally connected with a power supply, and can also be connected with a power supply circuit in the detection circuit to supply power for the current sampling circuit. The value of the external power source may be determined according to the actual condition of the circuit, for example, 15V, 12V, and the like, and is not limited herein.
In the embodiment of the present invention, the voltage sampling circuit is used to collect the voltage of the rotor winding, and in other embodiments, other voltage sampling circuits may be used as long as they can collect the voltage of the rotor winding.
In the embodiment of the invention, the voltage transformer TV collects the voltage of the eighth resistor R8, and the voltage is amplified and filtered by the first amplifier and then input into the analog-to-digital conversion circuit.
In one possible implementation manner of the present invention, as shown in fig. 4, a circuit diagram of a rotation speed sampling circuit is provided in an embodiment of the present invention. As shown, the rotation speed sampling circuit may include: a trigger and a magnetoelectric rotation speed sensor S.
Specifically, the magnetoelectric rotation speed sensor S is used for collecting a rotation speed pulse signal of a speed measuring gear of the rotor, a first output end of the magnetoelectric rotation speed sensor S is connected with an input end of the trigger, and a second output end of the magnetoelectric rotation speed sensor S is grounded. The output end of the trigger is connected with the input end of the microprocessor.
Wherein, magnetoelectric revolution speed sensor S is close to the gear setting that tests the speed of rotor to measured data is more accurate.
In the embodiment of the invention, the trigger can adopt a Schmitt trigger U3. The Schmitt trigger U3 can shape the waveform of the analog signal into a square waveform which can be processed by a digital circuit, and has hysteresis characteristics and strong anti-interference capability.
In the embodiment of the present invention, the above rotation speed sampling circuit is used to collect the voltage of the speed measuring gear of the rotor, and in other embodiments, other speed measuring sampling circuits may be used as long as they can collect the rotation speed pulse signal of the speed measuring gear of the rotor.
In the embodiment of the invention, the rotating speed pulse signal is converted into the pulse signal through the magnetoelectric rotating speed sensor S, the pulse signal is subjected to waveform shaping through the Schmidt trigger U3, and then the pulse signal directly enters the microprocessor for counting and calculating the rotating speed.
In one possible implementation of the present invention, any chip may be used as the analog-to-digital conversion circuit, and in this embodiment, an AD7656 chip is used. The analog-to-digital conversion circuit is responsible for converting the voltage and current analog signals collected by the sampling circuit into high-precision 16-bit digital signals, and the signals are subjected to positive and negative power supply input and matched with the positive and negative power supplies of the amplifier, so that the signals can be captured without damage.
In one possible embodiment of the present invention, the first amplifier U1 and the second amplifier U2 may be of the same type or different types, and the type may be any type. In the embodiment of the invention, the first amplifier U1 and the second amplifier U2 are both OP27GS type amplifiers.
In one possible implementation manner of the present invention, as shown in fig. 5, a circuit diagram of a rotor winding ac impedance detection circuit according to an embodiment of the present invention is provided. As shown, the rotor winding ac impedance detection circuit may further include: a power supply circuit.
Specifically, the output end of the power supply circuit is respectively connected with the current sampling circuit, the voltage sampling circuit, the rotating speed sampling circuit, the analog-to-digital conversion circuit and the microprocessor, and provides electric energy for the current sampling circuit, the voltage sampling circuit, the rotating speed sampling circuit, the analog-to-digital conversion circuit and the microprocessor.
In one possible embodiment of the present invention, the rotor winding ac impedance detection circuit may further include: a voltage stabilizing circuit.
Specifically, a first input end of the voltage stabilizing circuit is connected with an output end of the power supply circuit, a second input end of the voltage stabilizing circuit is grounded, and an output end of the voltage stabilizing circuit is respectively connected with the current sampling circuit, the voltage sampling circuit, the rotating speed sampling circuit, the analog-to-digital conversion circuit and the microprocessor.
In the embodiment of the present invention, the voltage regulator circuit may adopt any circuit structure, and the present invention is not particularly limited.
In one possible embodiment of the present invention, the rotor winding ac impedance detection circuit may further include: display circuit and memory module.
Specifically, the input end of the display circuit is connected with the output end of the microprocessor, and the display circuit displays current data, voltage data and rotating speed data processed by the microprocessor. The input end of the storage module is connected with the output end of the microprocessor, and the storage module stores the current data, the voltage data and the rotating speed data processed by the microprocessor.
In the embodiment of the present invention, the display circuit may be any display circuit, and is not particularly limited in the present invention.
The storage module can adopt an SD card memory, and all the acquired data are stored in the SD card memory so as to facilitate subsequent lookup and derivation of historical data.
In one possible embodiment of the present invention, the rotor winding ac impedance detection circuit may further include: and an external interface. The method is used for interacting with the outside, for example, interaction keys can be connected to realize data query. And a USB interface can be connected to export data.
In the embodiment of the present invention, the power supply circuit may provide electric energy not only for the current sampling circuit, the voltage sampling circuit, the rotation speed sampling circuit, the analog-to-digital conversion circuit, and the microprocessor, but also for a circuit connected to the output terminal of the rotor winding ac impedance detection circuit, such as a storage module, a display circuit, an interactive key, and the like.
In a possible embodiment of the present invention, the type of the microprocessor is not limited, as long as the microprocessor can realize all functions of the present invention.
The microprocessor is used for calculating the acquired rotating speed pulse into a rotating speed, reading digital data in the analog-to-digital conversion circuit and controlling the three to perform synchronous sampling so as to synchronize the acquired data. Through a calculation module in the microprocessor, the ratio of voltage and current, namely impedance, is determined as a vertical coordinate, the rotating speed is determined as a horizontal coordinate, then impedance coordinate points under various rotating speeds are generated and displayed on a display corresponding to a display circuit, and the impedance coordinate points can be transmitted outwards through an external interface, so that an alternating current impedance change condition curve of the whole process piece of the rotor increasing/decreasing rotating speed is generated. The sampling frequency of each sampling circuit is not lower than 10Hz, data can be collected for many times at the same rotating speed during continuous sampling, and the voltage and current data sampled for the first time at the rotating speed and the impedance value calculated by the voltage and current data are taken as display values. The rotation speed display resolution can be 1 revolution per minute (1r/min), namely the rotation speed adopts an integral mode, and an impedance coordinate point is generated every time the rotation speed changes by 1 r/min.
The detection circuit provided by the embodiment of the invention has the functions of real-time display, storage and output, and can be used for looking up and deriving test historical data, namely a voltage value, a current value, an impedance value and a continuous impedance curve during a certain test rotating speed change period at any rotating speed.
The embodiment of the invention also provides a device for detecting the alternating-current impedance of the rotor winding. The apparatus may include: the holding box is provided with a handle, a circuit board is arranged in the holding box, and any one of the detection circuits is arranged on the circuit board.
Further, the apparatus may further include: and the roller is installed on the accommodating box.
When the rollers are installed, the containing box can be provided with a pull rod, and the containing box is convenient to carry.
In one possible embodiment of the invention, the protection grade of the box body of the containing box is not lower than IP65, and the box body has the functions of water resistance, moisture resistance, dust resistance, mechanical impact resistance and electromagnetic shielding. The box body adopts a draw-bar box structure, and is convenient to carry.
The containing box is also provided with a panel, the panel is provided with a display screen, a navigation key, a test power input terminal, a test power output terminal and a rotating speed input terminal, a working power supply socket (AC220V) and a data export USB2.0 socket of the panel are arranged on the panel, and an industrial SD card can be used as a data storage medium.
In one possible real-time mode of the invention, the containing box can be made of alloy materials or engineering plastics, the interior of the box cover is attached with a buffer sponge lining, and the panel is made of insulating materials.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A rotor winding ac impedance detection circuit, comprising: the device comprises a current sampling circuit, a voltage sampling circuit, an analog-to-digital conversion circuit, a rotating speed sampling circuit and a microprocessor;
the input end of the current sampling circuit is connected with the rotor winding in series, and the current sampling circuit collects the current of the rotor winding;
the input end of the voltage sampling circuit is connected with the rotor winding in parallel, and the voltage sampling circuit collects the voltage of the rotor winding;
the input end of the analog-to-digital conversion circuit is respectively connected with the output end of the current sampling circuit and the output end of the voltage sampling circuit, and the analog-to-digital conversion circuit respectively converts the current analog quantity acquired by the current sampling circuit and the voltage analog quantity acquired by the voltage sampling circuit into digital signals;
the rotating speed sampling circuit is used for acquiring a rotating speed pulse signal of a speed measuring gear of the rotor;
the input end of the microprocessor is respectively connected with the output end of the analog-to-digital conversion circuit and the output end of the rotating speed sampling circuit, the output end of the microprocessor is connected with the output terminal of the detection circuit, and the microprocessor respectively processes the current signal and the voltage signal output by the analog-to-digital conversion circuit and the rotating speed signal output by the rotating speed sampling circuit and outputs data through the output terminal.
2. The detection circuit of claim 1, wherein the current sampling circuit comprises: the circuit comprises a current transformer, a filter circuit, a first amplifier, a third resistor, a second capacitor, a third capacitor and a fourth resistor;
the input end of the current transformer is connected with the rotor winding, and the output end of the current transformer is connected with the filter circuit;
the non-inverting input end of the first amplifier is connected with the filter circuit, the inverting input end of the first amplifier is connected with the first end of the third resistor, the positive power supply input end of the first amplifier is respectively connected with a positive power supply terminal and the first end of the second capacitor, the negative power supply input end of the first amplifier is respectively connected with a negative power supply terminal and the first end of the third capacitor, and the output end of the first amplifier is respectively connected with the second end of the third resistor, the first end of the fourth resistor and the input end of the analog-to-digital conversion circuit;
and the second end of the second capacitor, the second end of the third capacitor and the second end of the fourth resistor are all grounded.
3. The detection circuit of claim 2, wherein the filter circuit comprises: the circuit comprises a first resistor, a second resistor and a first capacitor;
the first end of the first resistor is respectively connected with the first end of the current transformer and the first end of the second resistor, and the second end of the first resistor is respectively connected with the second end of the current transformer and the first end of the first capacitor;
the second end of the second resistor is respectively connected with the second end of the first capacitor and the non-inverting input end of the first amplifier;
the first end of the first capacitor is grounded.
4. The detection circuit of claim 1, wherein the voltage sampling circuit comprises: the voltage transformer, the second amplifier, the eighth resistor, the fourth capacitor, the fifth resistor, the sixth resistor, the fifth capacitor, the seventh resistor, the sixth capacitor, the seventh capacitor and the ninth resistor;
the input end of the voltage transformer is connected with the rotor winding through the eighth resistor, the first output end of the voltage transformer is respectively connected with the first end of the fourth capacitor, the first end of the sixth resistor, the first end of the fifth capacitor and the inverting input end of the second amplifier, and the second output end of the voltage transformer is grounded;
the second end of the sixth resistor is connected with the first end of the fifth resistor;
the second end of the fifth capacitor is connected with the first end of the seventh resistor;
the non-inverting input end of the second amplifier is grounded, the positive power supply input end of the second amplifier is respectively connected with a positive power supply terminal and the first end of the sixth capacitor, the negative power supply input end of the second amplifier is respectively connected with a negative power supply terminal and the first end of the seventh capacitor, and the output end of the second amplifier is respectively connected with the second end of the fourth capacitor, the second end of the fifth resistor, the second end of the seventh resistor and the first end of the ninth resistor;
a second end of the sixth capacitor and a second end of the seventh capacitor are both grounded;
and the second end of the ninth resistor is connected with the input end of the analog-to-digital conversion circuit.
5. The detection circuit of claim 1, wherein the speed sampling circuit comprises: a trigger and a magnetoelectric rotation speed sensor;
the magnetoelectric rotation speed sensor is used for acquiring a rotation speed pulse signal of a speed measuring gear of the rotor, a first output end of the magnetoelectric rotation speed sensor is connected with an input end of the trigger, and a second output end of the magnetoelectric rotation speed sensor is grounded;
and the output end of the trigger is connected with the input end of the microprocessor.
6. The detection circuit of claim 1, further comprising: a power supply circuit;
the output end of the power supply circuit is respectively connected with the current sampling circuit, the voltage sampling circuit, the rotating speed sampling circuit, the analog-to-digital conversion circuit and the microprocessor and provides electric energy for the current sampling circuit, the voltage sampling circuit, the rotating speed sampling circuit, the analog-to-digital conversion circuit and the microprocessor.
7. The detection circuit of claim 6, further comprising: a voltage stabilizing circuit;
the first input end of the voltage stabilizing circuit is connected with the output end of the power supply circuit, the second input end of the voltage stabilizing circuit is grounded, and the output end of the voltage stabilizing circuit is respectively connected with the current sampling circuit, the voltage sampling circuit, the rotating speed sampling circuit, the analog-to-digital conversion circuit and the microprocessor.
8. The detection circuit of claim 1, further comprising: a display circuit and a memory module;
the input end of the display circuit is connected with the output end of the microprocessor, and the display circuit displays the current data, the voltage data and the rotating speed data processed by the microprocessor;
the input end of the storage module is connected with the output end of the microprocessor, and the storage module stores the current data, the voltage data and the rotating speed data processed by the microprocessor.
9. A rotor winding ac impedance detection apparatus, said apparatus comprising: a container provided with a handle, a circuit board provided with a detection circuit according to any one of claims 1 to 8.
10. The detection apparatus of claim 9, further comprising: the gyro wheel, the gyro wheel is installed on holding the case.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0274691A1 (en) * | 1986-12-15 | 1988-07-20 | Hitachi, Ltd. | Fault diagnosis system for rotor winding of rotary electric machine |
| CN201035110Y (en) * | 2007-04-06 | 2008-03-12 | 哈尔滨国力电气有限公司 | Distributed generator rotor windings turn-to-turn short circuit functional failure on-line monitoring device |
| CN101988945A (en) * | 2009-08-07 | 2011-03-23 | 华东电力试验研究院有限公司 | Method for diagnosing interturn short circuit of rotor winding |
| CN202351325U (en) * | 2011-11-03 | 2012-07-25 | 杭州高电科技有限公司 | AC impedance tester of generator rotor |
| CN103513211A (en) * | 2013-10-25 | 2014-01-15 | 国家电网公司 | Detecting device for alternating-current impedance tester |
| CN206975182U (en) * | 2017-07-07 | 2018-02-06 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of generator amature experiment carbon-point |
| WO2018072969A1 (en) * | 2016-10-18 | 2018-04-26 | Abb Schweiz Ag | A method for detecting a fault in an electrical machine |
| CN108279362A (en) * | 2017-12-15 | 2018-07-13 | 上海电力学院 | Marine double fed electric machine rotor winding interturn short-circuit fault identification method |
| CN109450301A (en) * | 2018-10-17 | 2019-03-08 | 迪瑞医疗科技股份有限公司 | A kind of motor speed adjusts circuit and device |
| CN110146777A (en) * | 2019-05-13 | 2019-08-20 | 国网浙江省电力有限公司电力科学研究院 | A kind of generator/phase modifier rotor inter-turn short circuit fault detection method |
-
2020
- 2020-06-01 CN CN202010485778.1A patent/CN111650439A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0274691A1 (en) * | 1986-12-15 | 1988-07-20 | Hitachi, Ltd. | Fault diagnosis system for rotor winding of rotary electric machine |
| CN201035110Y (en) * | 2007-04-06 | 2008-03-12 | 哈尔滨国力电气有限公司 | Distributed generator rotor windings turn-to-turn short circuit functional failure on-line monitoring device |
| CN101988945A (en) * | 2009-08-07 | 2011-03-23 | 华东电力试验研究院有限公司 | Method for diagnosing interturn short circuit of rotor winding |
| CN202351325U (en) * | 2011-11-03 | 2012-07-25 | 杭州高电科技有限公司 | AC impedance tester of generator rotor |
| CN103513211A (en) * | 2013-10-25 | 2014-01-15 | 国家电网公司 | Detecting device for alternating-current impedance tester |
| WO2018072969A1 (en) * | 2016-10-18 | 2018-04-26 | Abb Schweiz Ag | A method for detecting a fault in an electrical machine |
| CN206975182U (en) * | 2017-07-07 | 2018-02-06 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of generator amature experiment carbon-point |
| CN108279362A (en) * | 2017-12-15 | 2018-07-13 | 上海电力学院 | Marine double fed electric machine rotor winding interturn short-circuit fault identification method |
| CN109450301A (en) * | 2018-10-17 | 2019-03-08 | 迪瑞医疗科技股份有限公司 | A kind of motor speed adjusts circuit and device |
| CN110146777A (en) * | 2019-05-13 | 2019-08-20 | 国网浙江省电力有限公司电力科学研究院 | A kind of generator/phase modifier rotor inter-turn short circuit fault detection method |
Non-Patent Citations (3)
| Title |
|---|
| 李论: "1000MW汽轮发电机转子线圈匝间短路动态分析", 《2018年江西省电机工程学会年会论文集》 * |
| 李鹏等: "汽轮发电机转子匝间短路的分析及处理", 《汽轮发电机转子匝间短路的分析及处理》 * |
| 黎文安等: "《泵站计算机综合自动化技术》", 30 September 2015, 武汉大学出版社 * |
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Application publication date: 20200911 |