CN105974247B - Test system and method for conductive slip ring - Google Patents

Abstract

The invention provides a testing system and method for a conductive slip ring. The stator of the first conductive slip ring and the stator of the second conductive slip ring are both connected to the platform. The rotors of the two conductive slip rings are arranged oppositely and connected through a connector; The rotor of one conductive slip ring is driven to rotate by a driving motor, and the rotor of the other conductive slip ring follows and rotates synchronously; the driving motor is located on the platform; the input end of the converter is connected to the power grid, and the output end of the converter is connected to the first conductive slip ring The stator of the second conductive slip ring, the rotors of the two conductive slip rings are connected through electrical connections, and the stator of the second conductive slip ring is connected to the power grid; the converter controller outputs a pulse width modulation signal to control the converter to output different test currents to the second conductive slip ring. The first conductive slip ring and the second conductive slip ring are loaded; the test equipment tests the temperature rise data and communication quality data of the first conductive slip ring and the second conductive slip ring when loaded with different test currents. The entire system consumes very little power and can perform performance testing for high-power conductive slip rings.

Description

Test system and method for conductive slip ring

technical field

The invention relates to the technical field of equipment testing, in particular to a testing system and method for a conductive slip ring.

Background technique

The conductive slip ring on the wind turbine is the key component of the pitch control mechanism and the generator in the wind turbine. It plays the role of control signal and power transmission under the rotating state of the wind turbine. It is to realize the control signal and current transmission of two relative rotating mechanisms. The power transmission device can provide control signals for the wind turbine, and can also output the electric energy of the wind turbine, which is the core component of the entire wind turbine.

With the development of wind power generation technology, the power of wind turbines is also increasing, and the power of wind power pitch system is also increasing. The electric energy used in the impeller needs to be transmitted through the conductive slip ring, therefore, the capacity of the conductive slip ring is also increasing. In order to ensure the safety of wind turbine operation, it is necessary to carry out load verification on the conductive slip ring during the design or selection process of the conductive slip ring.

In the prior art, energy consumption is generally used for loading small-sized conductive slip rings. However, continuing to use the energy-consuming loading method for high-power conductive slip rings will consume huge energy, and the load volume and heat generation will be huge.

Therefore, those skilled in the art need to provide a test system and method for conductive slip rings, which can perform performance tests on high-power conductive slip rings without consuming huge energy.

Contents of the invention

In order to solve the above technical problems in the prior art, the present invention provides a test system for conductive slip rings, which can realize the performance test of low-power and high-power conductive slip rings without consuming huge energy and save energy.

An embodiment of the present invention provides a test system for a conductive slip ring, which is used to test two conductive slip rings at the same time; the system includes: a converter, a converter controller, a platform and testing equipment;

The two conductive slip rings are respectively: a first conductive slip ring and a second conductive slip ring;

The stator of the first conductive slip ring and the stator of the second conductive slip ring are all connected to the platform, and the rotor of the first conductive slip ring and the rotor of the second conductive slip ring are arranged oppositely and connected on the platform through a connector. Together;

The rotor of one of the conductive slip rings is driven to rotate by a drive motor, and the rotor of the other conductive slip ring rotates synchronously; the drive motor is located on the platform;

The input end of the converter is connected to the power grid, the output end of the converter is connected to the stator of the first conductive slip ring, and the rotor of the first conductive slip ring and the rotor of the second conductive slip ring pass through The electrical connection is connected, and the stator of the second conductive slip ring is connected to the grid, so that electric energy can be fed back to the grid;

The converter controller is used to output a pulse width modulation signal to control the converter to output different test currents to load the first conductive slip ring and the second conductive slip ring;

The test device is used to test the temperature rise data and communication quality data of the first conductive slip ring and the second conductive slip ring when the different test currents are loaded.

Preferably, the test equipment includes: a processor, a first group of temperature sensors arranged inside the first conductive slip ring, and a second group of temperature sensors arranged inside the second conductive slip ring;

The processor is configured to collect the temperature of the first group of temperature sensors to obtain the temperature rise data of the first conductive slip ring; and collect the temperature of the second group of temperature sensors to obtain the temperature of the second conductive slip ring temperature rise data.

Preferably, the test equipment further includes: a communication master station and at least the following two communication slave stations: a first communication slave station and a second communication slave station

The communication master station is connected to the first communication slave station through the first conductive slip ring through the first communication line;

The communication master station is connected to the second communication slave station through the second communication line through the second conductive slip ring;

The communication master station is configured to send a control instruction to the communication slave station;

The communication slave station is used to respond to the control command;

The processor is used to test the communication signal on the first communication line and the communication signal on the second communication line, and obtain the communication quality data of the first conductive slip ring and the second communication quality data by analyzing the communication signal. Communication quality data for conductive slip rings.

Preferably, the converter includes: a rectifier and an inverter;

The input end of the rectifier is connected to the grid;

The output end of the rectifier is connected to the input end of the inverter;

The output end of the inverter is connected to the stator of the first conductive slip ring.

Preferably, the converter further includes: a Boost circuit, a filter capacitor and a filter;

The input end of the Boost circuit is connected to the output end of the rectifier;

The filter capacitor is connected in parallel to the output end of the Boost voltage boosting circuit;

The output end of the Boost circuit is connected to the input end of the inverter;

The output end of the inverter is connected to the filter;

The output end of the filter is connected to the stator of the first conductive slip ring.

Preferably, it also includes: an isolation transformer;

The isolation transformer is connected between the grid and the converter;

The primary winding and secondary winding of the isolation transformer adopt delta-star connection.

Preferably, it also includes: a main circuit breaker, a circuit breaker on the rectification side of the converter and a circuit breaker on the output side of the converter;

One end of the main circuit breaker is connected to the grid, and the other end of the main circuit breaker is connected to the input end of the isolation transformer;

One end of the circuit breaker on the rectification side of the converter is connected to the output end of the transformer, and the other end of the circuit breaker on the rectification side of the converter is connected to the input end of the converter;

One end of the circuit breaker on the output side of the converter is connected to the output end of the inverter, and the other end of the circuit breaker on the output side of the inverter is connected to the stator of the first conductive slip ring.

The embodiment of the present invention also provides a test method for a conductive slip ring, using the system to test the conductive slip ring, including:

Control the different test currents required by the converter output conductive slip ring through the converter controller;

Utilize the drive motor to drive the rotor of a conductive slip ring to rotate;

Collecting temperature rise data and communication quality data of the first conductive slip ring and the second conductive slip ring when the different test currents are loaded;

The temperature rise data and communication quality data are analyzed to obtain test results of the conductive slip ring.

Preferably, collecting the temperature rise data of the first conductive slip ring when the different test currents are loaded, specifically:

Collect the temperature of the first group of temperature sensors arranged on the first conductive slip ring to obtain the temperature rise data of the first conductive slip ring;

Collect the temperature rise data of the second conductive slip ring when the different test currents are loaded, specifically:

Collecting the temperature of the second group of temperature sensors arranged on the second conductive slip ring to obtain the temperature rise data of the second conductive slip ring.

Preferably, the collecting the communication quality data of the first conductive slip ring when the different test currents are loaded is specifically:

Collect communication signals on the first communication line between the communication master station and the first communication slave station; the first communication line passes through the first conductive slip ring;

Collecting the communication quality data of the second conductive slip ring when the different test currents are loaded, specifically:

Collect communication signals on the second communication line directly between the communication master station and the second communication slave station; the second communication line passes through the second conductive slip ring;

The communication master station is used to send a control instruction to the communication slave station, and the communication slave station is used to respond to the control instruction.

Compared with the prior art, the present invention has at least the following advantages:

The current is supplied to the conductive slip ring through the converter, and the conductive slip ring feeds back the current to the power grid. The entire system consumes very little power, so that the performance test of the high-power conductive slip ring can be performed. In addition, the converter controller can control the converter to output different test currents, so as to simulate the real working scene of the conductive slip ring, so that the conductive slip ring can realize the performance test under different current loading. And by connecting the rotors of the two conductive slip rings together through the connector, the performance test of the two conductive slip rings can be realized at the same time. According to the results of the performance test, the design and selection of the conductive slip ring can be guided.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in this application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of a test system embodiment 1 of a conductive slip ring provided by the present invention;

Fig. 2 a is the schematic diagram of the second embodiment of the test system of the conductive slip ring provided by the present invention;

Fig. 2b is a schematic diagram of the internal structure of the converter provided by the present invention;

Fig. 3 is a schematic diagram of testing the communication quality of a conductive slip ring provided by the present invention;

Fig. 4 is the flow chart of the conductive slip ring test method provided by the present invention;

Fig. 5 is a schematic diagram of a loading test of a conductive slip ring provided by the present invention.

Explanation of reference numbers:

100-converter; 200-converter controller; 300-platform; 400-test equipment; first conductive slip ring-501; second conductive slip ring-502; 301-connector; 302-drive motor; 303 -Electrical connection; 401-processor; 402-communication master station; 403-first communication slave station; 404-second communication slave station; 405-third communication slave station; 101-rectifier; 102-inverter; 103-filter; 104-Boost boost circuit; 105-discharging resistor; 106-precharging circuit; K1-main circuit breaker; K2-converter rectification side circuit breaker; K3-converter output side circuit breaker.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

System embodiment one:

Referring to FIG. 1 , this figure is a schematic diagram of Embodiment 1 of a test system for a conductive slip ring provided by the present invention.

The test system of the conductive slip ring provided in this embodiment is used to test two conductive slip rings at the same time; the system includes: a converter 100, a converter controller 200, a platform 300 and a testing device 400;

The two conductive slip rings are: the first conductive slip ring 501 and the second conductive slip ring 502;

The stator of the first conductive slip ring 501 and the stator of the second conductive slip ring 502 are all connected on the platform, and the rotor of the first conductive slip ring 501 and the rotor of the second conductive slip ring 502 are arranged oppositely and connected together by a connector;

The rotor of one of the conductive slip rings is driven to rotate by the drive motor 302, and the rotor of the other conductive slip ring follows the synchronous rotation; the drive motor 302 is located on the platform 300;

It should be noted that the driving motor 302 can drive the conductive slip ring to rotate, and the speed can satisfy 0-the rated speed of the conductive slip ring. The performance of the conductive slip ring under dynamic loading under various speed conditions can be simulated by adjusting the speed.

The input end of the converter 100 is connected to the power grid, the output end of the converter 100 is connected to the stator of the first conductive slip ring 501, and the rotor of the first conductive slip ring 501 and the rotor of the second conductive slip ring 502 are connected by electrical wires The stator of the second conductive slip ring 502 is connected to the grid, so that electric energy can be fed back to the grid; the whole system forms a closed-loop circulation.

It can be understood that the test system can test the performance of two conductive slip rings at the same time. For the convenience of testing, the models of the two conductive slip rings tested at the same time should preferably be the same.

It can be seen from Figure 1 that the conductive slip ring is only used as a part of the power supply path and does not consume a lot of energy. The entire power supply path feeds back the electric energy to the power grid. Resistive loads consume a lot of power, so the test system consumes little power and is easy to provide a large test current to the conductive slip ring.

The converter controller 200 is configured to output a pulse width modulation signal to control the converter 100 to output different test currents to load the first conductive slip ring 501 and the second conductive slip ring 502;

It can be understood that the converter controller 200 can accurately control the output current of the converter by adjusting the output pulse width modulation signal PWM, and the current can simulate different test currents and different higher harmonic components, thereby simulating Electrical interference test.

The testing device 400 is used to test the temperature rise data and communication quality data of the first conductive slip ring 501 and the second conductive slip ring 502 when different test currents are applied.

In the system provided in this embodiment, the current is supplied to the conductive slip ring through the converter, and the conductive slip ring feeds back the current to the power grid. The entire system consumes very little electric energy. In addition, the converter controller can control the converter to output different test currents, so as to simulate the real working scene of the conductive slip ring, so that the conductive slip ring can realize the performance test under different current loading. And by connecting the rotors of the two conductive slip rings together through the connector, the performance test of the two conductive slip rings can be realized at the same time. According to the results of the performance test, the design and selection of the conductive slip ring can be guided.

System embodiment two:

Referring to Fig. 2a, this figure is a schematic diagram of Embodiment 2 of a test system for a conductive slip ring provided by the present invention.

In the test system provided by this embodiment, the test equipment includes: a processor 401, a first group of temperature sensors (not shown in the figure) arranged inside the first conductive slip ring, and a first group of temperature sensors arranged inside the second conductive slip ring. Two groups of temperature sensors (not shown in the figure);

It can be seen from FIG. 2 a that the rotor of the first conductive slip ring 501 and the rotor of the second conductive slip ring 502 are connected together through a connector 301 , and a driving motor 302 is provided on the platform 300 .

The processor 401 is used to collect the temperature of the first group of temperature sensors to obtain the temperature rise data of the first conductive slip ring; it is also used to collect the temperature of the second group of temperature sensors to obtain the temperature rise data of the second conductive slip ring.

It can be understood that the conductive slip ring includes multiple channels, and the temperature resistance performance of different channels can be measured. Specifically, temperature sensors can be set at key positions for measurement according to needs. A conductive slip ring can be equipped with multiple temperature sensors. In this embodiment The number of temperature sensors is not specifically limited.

It should be noted that the test data of the first conductive slip ring and the second conductive slip ring are processed separately, for example, the temperature measured by the first group of temperature sensors can characterize the temperature resistance of the first conductive slip ring, and the temperature of the second group of The temperature measured by the sensor can characterize the temperature resistance performance of the second conductive slip ring.

When measuring the temperature, it can specifically measure the temperature of the conductive slip ring at different speeds and different loading currents.

In addition, the test of the conductive slip ring not only needs to test its temperature resistance performance, but also needs to test its communication quality. Therefore, the test equipment provided in this embodiment also includes: a communication master station 402 and at least the following two communication slave stations: the first a communication slave station and a second communication slave station;

It can be understood that each conductive slip ring needs to correspond to a communication master station and at least one communication slave station in order to test the communication quality of the conductive slip ring.

The communication master station 402 is connected to the first communication slave station through the first conductive slip ring 501 through the first communication line;

The communication master station 402 is connected to the second communication slave station through the second conductive slip ring 502 through the second communication line;

The communication master station 402 is used to send control instructions to each communication slave station;

Communication slave station, used to respond to control commands;

The processor 401 is used to test the communication signal on the first communication line and the communication signal on the second communication line, and obtain the communication quality data of the first conductive slip ring and the communication of the second conductive slip ring by analyzing the communication signal quality data.

It can be understood that the first conductive slip ring and the second conductive slip ring may share one communication master station, or may correspond to independent communication master stations respectively.

The schematic diagram of the communication master station and the communication slave station can be referred to FIG. 3 , which is a schematic diagram of the communication test circuit of the conductive slip ring provided by the present invention.

Since the test of each conductive slip ring is the same, FIG. 3 only introduces the first conductive slip ring 501 as an example, and the test of the second conductive slip ring is the same, so details are not repeated here.

The communication lines in one conductive slip ring in this embodiment are the communication lines between one communication master station and three communication slave stations. It can be understood that the conductive slip ring has many channels. If the communication quality of each channel is to be measured, each channel must pass through a communication line. Therefore, a corresponding communication slave station is required. That is, the number of communication channels that a conductive slip ring needs to measure is the same as the number of corresponding communication slave stations.

FIG. 3 includes a communication master station 402 and three communication slave stations, namely a first communication slave station 403 , a second communication slave station 404 and a third communication slave station 405 .

As can be seen from Fig. 3, the communication line between the communication master station 402 and the first communication slave station 403, the second communication slave station 404 and the third communication slave station 405 passes through the first conductive slip ring 501, and the first conductive slip ring The ring 501 functions as a wire. When the first conductive slip ring 501 generates signal interference when the current is applied, it will inevitably affect the communication signal between the communication master station and the communication slave station. Therefore, the communication of each channel of the first conductive slip ring 501 can be judged by detecting the communication signal quality.

The communication master station has the right to control the bus, periodically reads the input information of the communication slave station and periodically sends output information to the communication slave station, and the communication slave station only makes relevant responses or responses to the communication master station, and the collected data, status, etc. Send to the communication master station and execute the instruction sent by the communication master station.

It should be noted that, the processor 401 can detect the communication quality by capturing the waveform of the communication signal, and analyzing the communication faults in the communication line through communication protocol analysis and data packet analysis.

It should be noted that, as shown in FIG. 2a, the converter 100 includes: a rectifier 101 and an inverter 102;

The input end of the rectifier 101 is connected to the power grid; the power grid is a three-phase AC power grid, such as a 380V power grid. The three phases are L1, L2 and L3 respectively.

The output end of the rectifier 101 is connected to the input end of the inverter 102;

The output end of the inverter 102 is connected to the stator of the first conductive slip ring 501 .

The converter controller 200 can control the inverter 102 to output different currents, including harmonic currents, to the conductive slip ring. It can be understood that the converter controller 200 outputs different PWMs to control the on-off of each switch tube in the inverter 102 , so as to control the output current of the inverter 102 .

The converter provided in this embodiment adopts the conversion method of AC-DC-DC-AC, and rectifies the AC power provided by the power grid into DC through the three-phase bridge rectifier, and then passes through the inverter of the three-phase inverter bridge after filtering. Inverted into alternating current that matches the voltage and frequency of the grid and fed back to the grid.

In addition, the converter also includes: a filter capacitor C and a filter 103;

The filter capacitor C is used to filter out the interference signal in the output signal of the rectifier 101 .

The filter 103 is used to filter out the interference signal in the output signal of the inverter 102 .

Wherein, as shown in FIG. 2a, the filter 103 may be a filter composed of a capacitor and an inductor.

Continuing to refer to FIG. 2a, in addition, the system may further include: an isolation transformer T1;

The isolation transformer T1 is connected between the grid and the converter 100;

The primary winding and the secondary winding of the isolation transformer T1 adopt a delta-star connection.

It can be understood that the isolation transformer T1 can isolate the converter from the grid, and the delta-star connection can suppress the influence of higher harmonics. The capacity of T1 can be selected according to the capacity of the converter, and should meet the requirement of the maximum output power of the converter.

Continue referring to Fig. 2a, the test system provided by the present embodiment also includes: main circuit breaker K1, converter rectification side circuit breaker K2 and converter output side circuit breaker K3; K1 is the power switch of the whole test circuit, K1's The capacity should meet the energy consumption of the entire test circuit, and a certain capacity should be left to cut off the fault current when the test circuit fails to protect equipment and personal safety. The capacity of K2 and K3 should preferably meet the maximum current carrying capacity of the slip ring to be tested. In the case of overcurrent in the test circuit, the circuit can be cut off to protect the safety of the slip ring and the test equipment.

One end of the main circuit breaker K1 is connected to the power grid, and the other end of the main circuit breaker K1 is connected to the input end of the isolation transformer T1;

One end of the circuit breaker K2 on the rectification side of the converter is connected to the output end of the transformer T1, and the other end of the circuit breaker K2 on the rectification side of the converter is connected to the input end of the converter 100;

One end of the circuit breaker K3 on the output side of the converter is connected to the output end of the inverter, and the other end of the circuit breaker K3 on the output side of the converter is connected to the stator of the first conductive slip ring 501 .

In the actual test, the specific operation process is as follows:

1. Close K1.

2. Close K3, and the converter control circuit is energized.

3. Close K2 after the self-test of the converter is completed.

4. Set parameters such as the output current of the converter and the harmonic components emitted by the converter according to the requirements of the slip ring loading test, and start the converter.

5. Set the speed of the driving motor according to the requirements of the slip ring loading test, and start the driving motor.

6. Start the test equipment to collect test data such as the internal temperature of the slip ring and the communication quality of the communication line after passing through the slip ring.

7. Test data processing and analysis, through the processing and analysis of the slip ring temperature data collected under different load conditions and the communication quality of the communication signal passing through the slip ring after the power channel is injected with different harmonic conditions, the performance of the slip ring is evaluated.

The test system provided in this embodiment adopts a current transformer and a conductive slip ring to form a loop, which is different from the traditional test method in which resistive load consumes energy. This system can provide a large test current for the conductive slip ring with low consumption. Meet the test requirements for high-power conductive slip rings. Moreover, the converter controller can precisely adjust the loading current, and the whole test circuit is simple and reliable.

In addition, 303 in FIG. 2 a is an electrical connection between the rotor of the first conductive slip ring 501 and the rotor of the second conductive slip ring 502 . One line in 303 is a power line, used to transmit the current of the loop; the other line is a signal line, used for communication quality testing; connect the rotor of the first conductive slip ring and the second conductive slip ring through these two electrical lines the rotor. It can be seen from Fig. 2a that the power supply from the power grid passes through the transformer T1, the converter 100, the first conductive slip ring 501, and the second conductive slip ring 502, and then feeds back to the power grid to form a closed-loop circulation. That is, the test loop provided in this embodiment is connected to the power grid, and the test current generated by the test loop returns to the input terminal of the converter. Therefore, the power supply of the test loop only needs to provide the power consumed by each device in the test loop. The energy is less, and it is easy to generate a large test current, which is suitable for loading tests on high-power conductive slip rings. The test loop solves the technical problem of large energy consumption in the prior art.

In addition, as shown in FIG. 2b, in addition to the above rectifier 101, inverter 102, filter 103 and filter capacitor C, the converter may also include: Boost voltage boosting circuit 104;

The input end of the Boost voltage boosting circuit 104 is connected to the output end of the rectifier 101;

The filter capacitor C is connected in parallel to the output end of the Boost voltage boosting circuit 104;

The output end of the Boost voltage boosting circuit 104 is connected to the input end of the inverter 102;

It should be noted that the converter provided in this embodiment has functions such as soft start, overvoltage/undervoltage protection, overcurrent protection, over/underfrequency protection, overload protection, operating parameter display (voltage, current, output power), etc. .

In addition, the converter 100 may also include a discharge resistor 105 and a pre-charging circuit 106 used in the starting process.

The converter 100 may also include a liquid crystal control panel (not shown in the figure), through which parameters such as the output current value, active power, and reactive power of the converter are adjusted.

Based on the test system for the conductive slip ring provided in the above embodiments, the embodiment of the present invention also provides a test method for the conductive slip ring, which will be described in detail below with reference to the accompanying drawings.

Referring to Fig. 4, this figure is a flow chart of the testing method of the conductive slip ring provided by the present invention.

The test method of the conductive slip ring provided in this embodiment uses the system of the above embodiment to test the conductive slip ring, including:

S401: Control the different test currents required by the converter to output the conductive slip ring through the converter controller;

It can be understood that the current output by the converter can be controlled by PWM output from the converter controller. This can accurately simulate the current in the real working scene of the conductive slip ring.

S402: Use the driving motor to drive the rotor of a conductive slip ring to rotate, and the speed of the rotor is 0-the rated speed of the conductive slip ring;

Since the rotors of the two conductive slip rings are connected together, the two conductive slip rings can rotate synchronously. And the speed can be adjusted to simulate the rotation conditions of the conductive slip ring in the real working scene.

S403: Collect temperature rise data and communication quality data of the first conductive slip ring and the second conductive slip ring when they are loaded with different test currents;

Collect the temperature rise data of the first conductive slip ring when loaded with different test currents, specifically:

Collect the temperature of the first group of temperature sensors arranged on the first conductive slip ring to obtain the temperature rise data of the first conductive slip ring;

Collect the temperature rise data of the second conductive slip ring when loaded with different test currents, specifically:

The temperature of the second group of temperature sensors arranged on the second conductive slip ring is collected to obtain temperature rise data of the second conductive slip ring.

Collect the communication quality data of the first conductive slip ring when loaded with different test currents, specifically:

Collect communication signals on the first communication line between the communication master station and the first communication slave station; the first communication line passes through the first conductive slip ring;

Collect the communication quality data of the second conductive slip ring when loaded with different test currents, specifically:

Collect communication signals on the second communication line between the communication master station and the second communication slave station; the second communication line passes through the second conductive slip ring;

The communication master is used to send control commands to the communication slaves, and the communication slaves are used to respond to the control commands.

S404: Analyze the temperature rise data and the communication quality data, and obtain the test results of the conductive slip ring.

In the method provided in this embodiment, the current is provided to the conductive slip ring through the converter, and the conductive slip ring feeds back the current to the power grid, so that the entire system consumes very little electric energy. In addition, the converter controller can control the converter to output different test currents, so as to simulate the real working scene of the conductive slip ring, so that the conductive slip ring can realize the performance test under different current loading. And by connecting the rotors of the two conductive slip rings together through the connector, the performance test of the two conductive slip rings can be realized at the same time. According to the results of the performance test, the design and selection of the conductive slip ring can be guided.

Based on the above test method for loading slip rings, the slip ring loading test can perform temperature rise tests on conductive slip rings under different load conditions, communication quality tests under different load conditions, and communication quality tests under different power harmonic conditions. , Slip ring overload test, etc. The temperature rise and communication quality of the slip ring under various test conditions are monitored through the temperature acquisition module and communication test equipment, and the performance of the slip ring is evaluated to provide data support for the selection and optimization of the slip ring.

In addition, refer to FIG. 5 , which is a schematic diagram of a loading test of a conductive slip ring provided by the present invention.

As can be seen from Fig. 5, the test system provided by the present invention can realize the temperature rise test of the conductive slip ring under different load conditions, the communication quality test under different load conditions, and the communication quality under various harmonic content of the power supply Test and overload test of conductive slip ring. Through the analysis of the above test data of the conductive slip ring, the design of the conductive slip ring can be optimized, which has good guiding significance.

The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the methods and technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent of equivalent change Example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention, which do not deviate from the technical solution of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. a kind of test system of conducting slip ring, which is characterized in that be used for while testing two conducting slip rings；The system includes： Current transformer, inverter controller, platform and test equipment；

Described two conducting slip rings are respectively：First conducting slip ring and the second conducting slip ring；

The stator of first conducting slip ring and the stator of the second conducting slip ring are all connected on the platform, and described first is conductive The rotor of the rotor of slip ring and the second conducting slip ring is oppositely arranged and is linked together by connector；

The rotor of one of conducting slip ring is driven by driving motor to be rotated, and the rotor of another conducting slip ring follows synchronous rotation Turn；The driving motor is located on the platform；

The input terminal of the current transformer connects power grid, and the output end of the current transformer connects the stator of the first conducting slip ring, described It is connected by electrical connecting wires between the rotor of first conducting slip ring and the rotor of second conducting slip ring, described second is conductive sliding The stator of ring connects the power grid, so that electric energy feedback gives the power grid；

The inverter controller controls the current transformer for output pulse width modulated signal and exports different test electric currents respectively It is loaded to first conducting slip ring and the second conducting slip ring；

The test equipment adds for testing first conducting slip ring and the second conducting slip ring in the different test electric current Temperature when load rises data and communication quality data.

2. the test system of conducting slip ring according to claim 1, which is characterized in that the test equipment includes：Processing Device, first group of temperature sensor being arranged inside the first conducting slip ring and second group of temperature being arranged inside the second conducting slip ring Spend sensor；

The processor, the temperature that the temperature for acquiring first group of temperature sensor obtains first conducting slip ring rise number According to；And the temperature of acquisition second group of temperature sensor obtains the temperature liter data of second conducting slip ring.

3. the test system of conducting slip ring according to claim 2, which is characterized in that the test equipment further includes：It is logical Believe main website and at least following two communication slave stations：First communication slave station and the second communication slave station；

The communication main station communicates slave station with described first by first conducting slip ring by the first communication line and is connected It connects；

The communication main station communicates slave station with described second by second conducting slip ring by the second communication line and is connected It connects；

The communication main station, for sending control instruction to the communication slave station；

The communication slave station, for being responded to the control instruction；

The processor, for testing the letter of the communication on the signal of communication and the second communication line on first communication line Number, and by obtaining the communication quality data of the first conducting slip ring and leading to for the second conducting slip ring to the analysis of the signal of communication Believe qualitative data.

4. according to the test system of claim 1-3 any one of them conducting slip rings, which is characterized in that the current transformer packet It includes：Rectifier and inverter；

The input terminal of the rectifier connects the power grid；

The output end of the rectifier connects the input terminal of the inverter；

The output end of the inverter connects the stator of first conducting slip ring.

5. the test system of conducting slip ring according to claim 4, which is characterized in that the current transformer further includes：Boost Booster circuit, filter capacitor and filter；

The input terminal of the Boost circuit connects the output end of the rectifier；

The filter capacitor is connected in parallel on the output end of the Boost circuit；

The output end of the Boost circuit connects the input terminal of the inverter；

The output end of the inverter connects the filter；

The output end of the filter connects the stator of first conducting slip ring.

6. the test system of conducting slip ring according to claim 4, which is characterized in that further include：Isolating transformer；

The isolating transformer is connected between the power grid and current transformer；

The armature winding and secondary windings of the isolating transformer use angle-star connection type.

7. the test system of conducting slip ring according to claim 6, which is characterized in that further include：Main breaker, current transformer Rectification side breaker and current transformer outlet side breaker；

One end of the main breaker connects the power grid, and the other end of the main breaker connects the defeated of the isolating transformer Enter end；

One end of the current transformer rectification side breaker connects the output end of the transformer, the current transformer rectification side breaker The other end connect the input terminal of the current transformer；

One end of the current transformer outlet side breaker connects the output end of the inverter, the inverter outlet side breaker The other end connect the stator of first conducting slip ring.

8. a kind of test method of conducting slip ring, which is characterized in that using claim 1-7 any one of them systems to conduction Slip ring is tested, including：

Current transformer, which is controlled, by inverter controller exports the different test electric currents that conducting slip ring needs；

The rotor of a conducting slip ring is driven to rotate using the driving motor；

Acquire the temperature of first conducting slip ring and the second conducting slip ring in the different test current load rise data and Communication quality data；

Data are risen to the temperature and communication quality data is analyzed, obtain the test result of conducting slip ring.

9. the test method of conducting slip ring according to claim 8, which is characterized in that acquisition first conducting slip ring exists Different temperature when testing current load rises data, specially：

Capture setting obtains the Wen Sheng of the first conducting slip ring in the temperature of first group of temperature sensor of first conducting slip ring Data；

It acquires second conducting slip ring and rises data in different temperature when testing current load, specially：

Capture setting obtains the Wen Sheng of the second conducting slip ring in the temperature of second group of temperature sensor of second conducting slip ring Data.

10. the test method of conducting slip ring according to claim 8, which is characterized in that the acquisition described first is conductive Slip ring is in different communication quality data when testing current load, specially：

Acquisition communication main station communicates the signal of communication on the first communication line between slave station with first；First communication line Pass through first conducting slip ring；

Acquire second conducting slip ring in different communication quality data when testing current load, specially：

Acquisition communication main station communicates the signal of communication on direct second communication line of slave station with second；Second communication line Pass through second conducting slip ring；

The communication main station is used to send control instruction to the communication slave station, and the communication slave station is used for the control instruction It responds.