Test structure for measuring temperature of motor rotor winding in real time

Abstract

The invention discloses a test structure for measuring the temperature of a motor rotor winding in real time, relates to the technical field of wind driven generator manufacturing, and provides the following scheme for solving the problem that a traditional measurement method is difficult to be directly applied to rotor winding temperature measurement in the prior art. Comprising a motor body, a temperature sensor, a signal transmission slip ring, a data acquisition device and a data processing device, the motor body comprises a stator and a rotor winding, the temperature sensor is installed on the outer wall of the rotor winding, and the temperature sensor is connected with the data acquisition device through the signal transmission slip ring. According to the invention, the wired temperature sensor is adopted, the wired signal is stably transmitted to the data acquisition device through the signal transmission slip ring and is connected to the signal processing device, so that the temperature of the motor rotor winding is measured in real time, and the problem that a traditional measurement method is difficult to be directly applied to the temperature measurement of the rotor winding is solved.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine manufacturing, and in particular to a test structure for measuring the temperature of a motor rotor winding in real time. Background Art

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives the rotor to rotate and ultimately outputs alternating current. A wind turbine generally consists of a wind rotor, a generator (including a device), a stabiliser (tail wing), a tower, a speed limit safety mechanism and an energy storage device. The working principle of a wind turbine is relatively simple. The wind rotor rotates under the action of wind force, and it converts the kinetic energy of the wind into the mechanical energy of the wind rotor shaft. The generator rotates and generates electricity driven by the wind rotor shaft. Broadly speaking, wind energy is also solar energy, so it can also be said that a wind turbine is a heat energy generator that uses the sun as a heat source and the atmosphere as a working medium.

[0003] During the operation of the motor, the temperature of the rotor winding is an important parameter. Accurately measuring the temperature of the rotor winding is of great significance for the safe operation, performance evaluation and life prediction of the motor. However, since the motor rotor is in a rotating state, traditional temperature measurement methods are difficult to directly apply to the temperature measurement of the rotor winding.

[0004] At present, the commonly used method is to obtain the temperature of the rotor winding by indirect measurement or estimation, but these methods have the problems of low accuracy and poor real-time performance. Therefore, traditional measurement methods are difficult to directly apply to rotor winding temperature measurement. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a test structure for real-time measurement of the temperature of a motor rotor winding, which overcomes the deficiencies of the prior art and effectively solves the problem that the traditional measurement method of the prior art is difficult to directly apply to the rotor winding temperature measurement.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A test structure for real-time measurement of the temperature of a motor rotor winding comprises a motor body, a temperature sensor, a signal transmission slip ring, a data acquisition device and a data processing device, wherein the motor body comprises a stator and a rotor winding, the temperature sensor is mounted on the outer wall of the rotor winding, the temperature sensor is connected to the data acquisition device via a signal transmission slip ring, and the data acquisition device is connected to the data processing device;

[0008] The temperature sensor is a wired temperature sensor, the measuring point is placed inside the rotor winding, and can measure the temperature parameters of the measuring point position inside the rotor winding in real time, and transmit the temperature signal to the signal transmission slip ring through the data line;

[0009] The signal transmission slip ring comprises a rotating shaft, a signal collecting ring, a transmission carbon brush and a fixed brush holder. The rotating shaft cooperates with the signal collecting ring to rotate synchronously with the motor. The signal collecting ring is used to receive the temperature signal sent by the temperature sensor. The transmission carbon brush transmits the temperature signal to the fixed brush holder in a rotating manner. The fixed brush holder transmits the temperature signal to the data acquisition device.

[0010] The data acquisition device acquires the temperature signal and transmits it to the data processing device in a wired manner. The data processing device displays and stores the temperature data of the rotor winding in real time.

[0011] By using a wired temperature sensor, the wired signal is stably transmitted to the data acquisition device through a signal transmission slip ring and connected to a signal processing device to achieve real-time measurement of the temperature of the motor rotor winding, solving the problem that traditional measurement methods are difficult to directly apply to rotor winding temperature measurement.

[0012] Furthermore, the temperature sensor adopts a patch structure and is pasted on the surface of the motor body without affecting the normal operation of the motor body.

[0013] Since the temperature sensor adopts a patch structure, it is easy to install and does not affect the normal operation of the motor.

[0014] Furthermore, the signal transmission slip ring is installed on the rotor of the motor body to facilitate receiving the signal from the temperature sensor when the rotor rotates.

[0015] The signal transmission device converts the rotating wired signal into a fixed wired signal, and the transmission is stable and reliable, which improves the accuracy and real-time performance of temperature measurement.

[0016] Furthermore, the data acquisition device is a multi-channel signal acquisition port.

[0017] The data processing device can process and analyze the temperature signal.

[0018] Furthermore, the data processing device is a computer, a tablet computer or a dedicated data processing device.

[0019] The data processing device displays the real-time temperature and stores the temperature data, providing strong support for the design, operation and maintenance of the motor.

[0020] The beneficial effects of the present invention are:

[0021] The present invention adopts a wired temperature sensor, stably transmits the wired signal to the data acquisition device through the signal transmission slip ring, and connects it to the signal processing device to achieve real-time measurement of the temperature of the motor rotor winding, solving the problem that the traditional measurement method is difficult to directly apply to the rotor winding temperature measurement;

[0022] The temperature sensor adopts a patch structure, which is easy to install and does not affect the normal operation of the motor. The signal transmission device converts the rotating wired signal into a fixed wired signal. The transmission is stable and reliable, which improves the accuracy and real-time performance of temperature measurement. The data processing device can process and analyze the temperature signal, display the real-time temperature and store the temperature data, providing strong support for the design, operation and maintenance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic diagram of the overall structure of a test structure for real-time measurement of the temperature of a motor rotor winding.

[0024] In the figure: 1. Electronic body; 2. Temperature sensor; 3. Signal transmission slip ring; 4. Data acquisition device; 5. Data processing device. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Example:

[0027] Reference Figure 1 , a test structure for real-time measurement of the temperature of a motor rotor winding, comprising a motor body 1, a temperature sensor 2, a signal transmission slip ring 3, a data acquisition device 4 and a data processing device 5, wherein the motor body 1 comprises a stator and a rotor winding, the temperature sensor 2 is mounted on the rotor winding, the temperature sensor 2 is connected to the data acquisition device 4 via the signal transmission slip ring 3, and the data acquisition device 4 and the data processing device 5 are electrically connected to each other;

[0028] The temperature sensor 2 is a wireless temperature sensor, which adopts a patch structure and is pasted on the surface of the rotor winding. The wireless temperature sensor can measure the temperature of the rotor winding in real time and transmit the temperature signal to the data acquisition device 4 by wireless means;

[0029] The signal transmission slip ring 3 is installed on the rotor winding of the motor body 1. The rotor winding includes a rotating shaft, a signal collecting ring, a transmission carbon brush and a fixed brush holder. The rotating shaft is used to drive the signal transmission ring 3 to rotate synchronously with the rotor. The signal transmission ring 3 is used to receive the temperature signal sent by the temperature sensor 2. The signal conversion module in the data acquisition device 4 transmits the temperature signal to the fixed brush holder through the transmission carbon brush. The fixed brush holder transmits the signal stably to the data acquisition device 4, and the data acquisition device 4 then transmits the signal to the data processing device 5;

[0030] The data processing device 5 is a computer, a tablet computer or a dedicated data processing device. The data processing device 5 processes and analyzes the received temperature signal, displays the real-time temperature of the rotor winding, and stores the temperature data;

[0031] In practical applications, the test structure of the present invention can be installed on a motor to analyze temperature data to understand the temperature change of the motor rotor winding, thereby providing a reference for the design, operation and maintenance of the motor.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A test structure for real-time measurement of the temperature of a motor rotor winding, comprising a motor body (1), a temperature sensor (2), a signal transmission slip ring (3), a data acquisition device (4) and a data processing device (5), characterized in that: The motor body (1) comprises a stator and a rotor winding, the temperature sensor (2) is mounted on the outer wall of the rotor winding, the temperature sensor (2) is connected to a data acquisition device (4) via a signal transmission slip ring (3), and the data acquisition device (4) is connected to a data processing device (5); The temperature sensor (2) is a wired temperature sensor, the measuring point of which is placed inside the rotor winding, and is capable of measuring the temperature parameters of the measuring point inside the rotor winding in real time, and transmitting the temperature signal to the signal transmission slip ring (3) via a data line; The signal transmission slip ring (3) comprises a rotating shaft, a signal collecting ring, a transmission carbon brush and a fixed brush holder, the rotating shaft cooperates with the signal collecting ring to rotate synchronously with the motor, the signal collecting ring is used to receive the temperature signal sent by the temperature sensor (2), the transmission carbon brush transmits the temperature signal to the fixed brush holder in a rotating manner, and the fixed brush holder transmits the temperature signal to the data acquisition device (5); The data acquisition device (4) acquires the temperature signal and transmits it to the data processing device (5) in a wired manner. The data processing device (5) displays and stores the temperature data of the rotor winding in real time.

2. A test structure for real-time measurement of motor rotor winding temperature according to claim 1, characterized in that: The temperature sensor (2) adopts a patch structure and is pasted on the surface of the motor body (1), without affecting the normal operation of the motor body (1).

3. A test structure for real-time measurement of motor rotor winding temperature according to claim 1, characterized in that: The signal transmission slip ring (3) is mounted on the rotor of the motor body (1) to facilitate receiving the signal from the temperature sensor (2) when the rotor rotates.

4. A test structure for real-time measurement of motor rotor winding temperature according to claim 1, characterized in that: The data acquisition device (4) is a multi-channel signal acquisition port.

5. A test structure for real-time measurement of motor rotor winding temperature according to claim 1, characterized in that: The data processing device (5) is a computer, a tablet computer and a dedicated data processing device.

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