WO2022016693A1 - 一种用于变频调速一体机的电磁信号测试平台 - Google Patents

一种用于变频调速一体机的电磁信号测试平台 Download PDF

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Publication number
WO2022016693A1
WO2022016693A1 PCT/CN2020/115039 CN2020115039W WO2022016693A1 WO 2022016693 A1 WO2022016693 A1 WO 2022016693A1 CN 2020115039 W CN2020115039 W CN 2020115039W WO 2022016693 A1 WO2022016693 A1 WO 2022016693A1
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Prior art keywords
speed regulation
integrated machine
frequency conversion
electromagnetic signal
regulation integrated
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PCT/CN2020/115039
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English (en)
French (fr)
Inventor
马英
张强
田莹
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山东科技大学
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Publication of WO2022016693A1 publication Critical patent/WO2022016693A1/zh

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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
    • G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass

Definitions

  • the invention relates to the technical field of coal mines and mine production, in particular to an electromagnetic signal testing platform for a frequency conversion and speed regulation integrated machine.
  • the large-scale mine equipment mainly adopts the "high-voltage inverter + motor" transmission mode.
  • the inverter is bulky, the protection level is low, and the output cable from the inverter to the motor is long, which interferes with other equipment along the line and cannot meet the requirements of coal mines and other mines. Equipped with working space and harsh environment requirements. If the high-voltage inverter and the motor are integrated, the length of the output cable can be reduced. However, the working conditions of the mining equipment are harsh, and the temperature between the inverter and the motor affects each other, and the electromagnetic signals are compatible with mutual interference and anti-interference.
  • the multi-source information sensing system and comprehensive protection device of the frequency conversion and speed control integrated machine are urgently needed to realize real-time monitoring of temperature, voltage, stall and other faults. Protection and operational trend analysis for safe, reliable, long-life operation of equipment under extremely high power density conditions.
  • the present invention provides an electromagnetic signal test platform for the frequency conversion and speed regulation integrated machine, which can test the electromagnetic compatibility of the frequency conversion integrated machine, and can collect the working process of the frequency conversion and speed regulation integrated machine.
  • the voltage, speed, temperature and torque signals in the device are used to judge the reliability of the variable frequency speed control integrated machine, and at the same time to ensure that the current magnetic field strength will not affect the personal safety of the staff.
  • An electromagnetic signal test platform for an all-in-one variable frequency speed regulation machine comprising a control room, an anechoic room, a shielding room 1 and a shielding room 2 separated by a shielding wall;
  • the control room is provided with a host computer, a D/A converter, a display screen and a field strength meter, and the host computer is respectively connected with the D/A converter and the display screen;
  • the anechoic chamber is provided with a frequency conversion and speed regulation integrated machine, an EMC antenna and a current probe, and the motor of the frequency conversion and speed regulation integrated machine is connected to the motor controller and the impedance stabilization network in sequence;
  • the transmission is connected with the dynamometer;
  • the outer wall of the frequency conversion and speed regulation integrated machine is provided with a temperature sensor,
  • the motor shaft is provided with a speed measurement sensor, and the temperature sensor and the speed measurement sensor are respectively connected with the D/A converter;
  • the shielding room 1 is provided with an EMI test receiver, the input end of the EMI test receiver is respectively connected with the field strength meter, the EMC antenna and the current probe, and the output end of the EMI test receiver is connected with the host computer;
  • a dynamometer and a power supply network are arranged in the second shielding room, and the power supply network is sequentially connected with a power supply filter and an impedance stabilization network; the output shaft of the dynamometer is provided with a torque sensor, and the power supply network is provided with a voltage The sensor, the torque sensor and the voltage sensor are respectively connected with the D/A converter.
  • the input shaft of the transmission is connected with the output shaft of the dynamometer through the coupling 1 provided with the ground ring 1, and the output shaft of the transmission is connected with the frequency conversion speed regulation through the coupling 2 provided with the ground ring 2.
  • first coupling and the second coupling are both made of insulating materials, so as to avoid the influence of the shaft current on the test results.
  • the input shaft of the transmission is enveloped by a panel switch cover.
  • the electromagnetic signal test platform for the frequency conversion and speed regulation integrated machine is further provided with a base 1 for supporting the input shaft of the transmission and a base 2 for supporting the output shaft of the transmission.
  • a polymer wave absorbing material such as a plasma material, is arranged around the inside of the anechoic chamber to prevent the radiation frequency and excitation method generated during the test operation from causing the shielding chamber to resonate, thereby greatly reducing the measurement error.
  • the frequency conversion and speed regulation integrated machine includes a casing, a frequency converter arranged on the top of the casing, a motor and an industrial control computer arranged inside the casing, and the frequency converter is electrically connected to the motor and the industrial control computer, respectively.
  • the casing is located on one side of the motor and has a double-layer structure, and the double-layer structure is provided with a folded water channel, one end of the folded water channel is connected to the water pump, and the other end of the folded water channel is connected to the water tank.
  • the water tank and the water pump are connected in series, and the water pump is connected with the industrial computer.
  • the arrangement of the turn-back water channel is as follows: a plurality of straight water channels parallel to the motor shaft are arranged inside the double-layer structure, and the plurality of straight water channels are sequentially connected by curved water channels to form a turn-back water channel.
  • the test platform of the present invention can carry out the EMC test on the frequency conversion and speed regulation integrated machine.
  • the EMC test tests the magnitude of the electromagnetic field interference and the anti-interference ability of the frequency conversion and speed regulation integrated machine, and judges the reliability of the current frequency conversion and speed regulation integrated machine. It also collects the strength of the current magnetic field to ensure that the current strength of the magnetic field will not affect the personal safety of the staff;
  • the test platform of the present invention can perform protection and display function tests on the frequency conversion and speed regulation integrated machine. By collecting the voltage, speed and temperature signals, and through the computer program in the host computer, it is judged whether the currently collected signal is the same as the signal required for normal operation.
  • the display module should be tested to ensure that the frequency conversion and speed control integrated machine can timely feedback the current situation to the outside world, so as to avoid potential safety hazards during the operation of the frequency conversion speed control integrated machine;
  • the frequency conversion and speed regulation integrated machine of the present invention realizes the integration of mechanics and electricity, and the length of the frequency conversion output cable is approximately zero, which minimizes the interference to other equipment, greatly improves the efficiency of electric transmission of large equipment, and subverts traditional electric drive.
  • FIG. 1 is a schematic structural diagram of an electromagnetic signal test platform for an all-in-one variable frequency speed regulation machine provided by an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a frequency conversion and speed regulation integrated machine provided by an embodiment of the present invention
  • FIG. 3 is a block diagram of a control program of torque, temperature, voltage and rotational speed provided by an embodiment of the present invention.
  • the present invention provides an electromagnetic signal testing platform for the frequency conversion and speed regulation integrated machine 22 , which includes a control room 4 separated by a shielding wall, Darkroom 1, shielding room 1 2 and shielding room 2 3;
  • the control room 4 is provided with a host computer 36, a D/A converter 35, a display screen 37 and a field strength meter 33, and the host computer 36 is respectively connected with the D/A converter 35 and the display screen 37;
  • a frequency conversion and speed regulation integrated machine 22, an EMC antenna 31 and a current probe 32 are arranged in the darkroom 1.
  • the motor 39 of the frequency conversion and speed regulation integrated machine 22 is sequentially connected to the motor controller 25 and the impedance stabilization network 26;
  • the 39 shaft is connected with the transmission 16 and the dynamometer 8 in turn;
  • the outer wall of the frequency conversion and speed regulation integrated machine 22 is provided with a temperature sensor, the motor 39 shaft is provided with a speed measuring sensor, and the temperature sensor and the speed measuring sensor are respectively connected with the D/A converter 35;
  • An EMI test receiver 34 is arranged in the shielding room 1 2.
  • the input end of the EMI test receiver 34 is respectively connected with the field strength meter 33, the EMC antenna 31 and the current probe 32, and the output end of the EMI test receiver 34 is connected with the host computer 36. ;
  • a dynamometer 8 and a power supply network 30 are arranged in the shielded room 23, and the power supply network 30 is sequentially connected with the power supply filter 28 and the impedance stabilization network 26; the output shaft of the dynamometer 8 is provided with a torque sensor 9, and the power supply network 30 is provided with a The voltage sensor, the torque sensor 9 and the voltage sensor are all connected to the D/A converter 35, respectively.
  • darkroom 1, shielding room 1 2, shielding room 2 3 and control room 4 are separated by shielding walls, wherein darkroom 1 and shielding room 1 are separated by shielding wall 1 5, and shielding
  • the second room 3 and the control room 4 are separated by a shielding wall 3 7
  • the darkroom 1 and the shielding room 1 2 and the shielding room 2 3 and the control room 4 are separated by a shielding wall 2 6 .
  • the darkroom 1 is provided with a second test bench 19 on which the frequency conversion and speed regulation integrated machine 22 is placed.
  • the frequency conversion speed regulation integrated machine 22 is equipped with a pulse speed measuring sensor 21 on the motor 39 shaft, which is used to measure the frequency conversion speed regulation integrated machine 22
  • Motor 39 shaft speed connect the data with the D/A converter 35 through the wire 23, and transmit it to the host computer 36, put the data on the display screen 37 through the host computer 36, and monitor the rotational speed of the motor 39 shaft in real time. Set the speed within a reasonable range of the speed.
  • the display 37 shows that the speed data is normal; when the speed is not within a reasonable range or a stall occurs (the speed of the motor 39 is 0 but still outputs torque), the display shows The screen 37 shows that the speed data is abnormal.
  • the operator takes corresponding emergency measures to control the platform and protect the inverter 22 in real time.
  • the preset speed is within a reasonable range, it can be set between 0 and the maximum speed of the motor 39.
  • the magnetic temperature sensor 20 is adsorbed on the outer wall surface of the frequency conversion and speed regulation integrated machine 22 to measure the temperature of the surface of the integrated machine body.
  • the magnetic temperature sensor 20 is connected with the D/A converter 35 through the wire 23 to transmit the temperature data to the upper position.
  • the computer 36 and the host computer 36 transmit the real-time temperature data to the display screen 37, and the host computer 36 presets a reasonable range of the temperature.
  • the temperature data displayed on the display screen 37 is normal.
  • the display screen 37 shows that the temperature data is abnormal.
  • the manual intervention operation when the preset temperature is within a reasonable range, can be set so that the temperature should not be higher than the current room temperature + 50 degrees Celsius; the output terminal of the impedance stabilization network 26 and the input terminal of the motor controller 25
  • the motor controller 25 is connected to the motor 39 part of the frequency conversion and speed regulation integrated machine 22 to control its stable operation.
  • the impedance stabilization network 26 and the motor controller 25 are both placed on the test table 27 .
  • a test stand one 13 is arranged in the shielding room two 3.
  • the test stand one 13 is grounded by metal material, and a base one 12 is arranged on it.
  • the dynamometer 8 is placed on the test stand one 13.
  • the output shaft of the dynamometer 8 and the torque The sensor 9 is connected, the torque sensor 9 is connected with the D/A converter 35 through the wire 23, and is transmitted to the upper computer 36 after analog-to-digital conversion, and the upper computer 36 transmits the real-time torque data to the display screen 37, so as to facilitate the monitoring of test conditions and control to ensure that the loading torque is within a reasonable range.
  • the host computer 36 presets a reasonable range of torque.
  • the display 37 When the torque is within a reasonable range, the display 37 displays normal torque data; when the torque is not within a reasonable range, The display screen 37 shows that the torque data is abnormal; the torque sensor 9 is connected with the coupling 11, the coupling 11 is connected with the input shaft of the transmission 16, and is supported by the base 12; the coupling 11 is equipped with a grounding ring 1 10.
  • the input shaft of the transmission 16 is enclosed by the wall panel switch cover 14 to avoid the influence of the shaft current on the test results; the output shaft of the transmission 16 is connected to the frequency conversion and speed regulation integrated machine 22 through the coupling two 17 equipped with the grounding ring two 18
  • the motor 39 is connected to the shaft; by adjusting the gears of the transmission 16, the different working conditions of the high torque and high speed of the variable frequency speed regulation integrated machine 22 are simulated respectively.
  • the input shaft of the transmission 16 is connected to the output shaft of the dynamometer 8 through a coupling 11 provided with a ground ring 10, and the output shaft of the transmission 16 is connected to the output shaft of the dynamometer 8 through a coupling 2 17 provided with a ground ring 18.
  • the motor 39 of the frequency conversion and speed regulation integrated machine 22 is connected to the shaft; the first coupling 11 and the second coupling 17 are made of insulating materials to avoid the influence of the shaft current on the test results; the input shaft of the transmission 16 passes through the wall panel switch cover 14 Envelope; the electromagnetic signal test platform for the frequency conversion and speed regulation integrated machine 22 is also provided with a base 12 for supporting the input shaft of the transmission 16 and a base 2 15 for supporting the output shaft of the transmission 16 .
  • a polymer wave absorbing material 24 such as a plasma material, is arranged around the anechoic chamber 1 to prevent the radiation frequency and excitation method generated during the test operation from resonating the shielding chamber, thereby greatly reducing the measurement error.
  • the field strength meter 33 , the EMC antenna 31 and the current probe 32 are all connected to the EMI test receiver 34 through the wire 23 respectively.
  • the transmission signals of different frequencies generated by the motor controller 25 in the test experiment are used to test the electromagnetic compatibility performance of the variable frequency speed control integrated machine 22 and the motor controller 25.
  • the EMC antenna 31 includes an EMI receiving antenna and an EMS transmitting antenna.
  • the EMS transmitting antenna is used to generate a specified electric field or magnetic field in a certain space around the variable frequency speed control integrated machine 22, and the EMI receiving antenna is mainly used to test the RE radiation disturbance field strength value.
  • Disturbance signal; the current probe 32 is used to test the disturbance of the lead 23, which is evaluated by measuring the conducted disturbance current.
  • the EMI test receiver 34 For the signals collected by the EMC antenna 31 and the current probe 32, the EMI test receiver 34 outputs the average spectrum of the disturbance signal to the upper computer 36. , peak spectrum and quasi-peak spectrum; the field strength meter 33 is used to measure the magnetic field strength in the control room 4, and output it to the host computer 36.
  • the reasonable interval range of the field strength is preset in the host computer 36, and when the field strength is within a reasonable interval, The display screen 37 shows that the field strength data is normal; when the field strength is not within a reasonable range, the display screen 37 shows that the field strength data is abnormal. At this time, manual intervention is performed to monitor the field strength in real time to ensure that it will not affect the personal safety of the staff.
  • the preset field strength is within a reasonable range, it can be set so that the magnetic field strength of the control room 4 cannot exceed 50 microTesla.
  • the power supply network 30 is used for the power line disturbance voltage test.
  • the power supply network 30 is connected to the Hall voltage sensor 29, and is connected to the D/A converter 35 through the wire 23 to transmit the voltage data to the host computer 36.
  • the host computer 36 transmits the real-time voltage data to the display screen 37, the reasonable range of the voltage preset in the host computer 36, when the voltage is within the reasonable range, the display screen 37 displays normal voltage data; when the voltage is not within the reasonable range, the display screen 37 Display abnormal voltage data, manual intervention and control, to protect the variable frequency speed regulation integrated machine 22, when the preset voltage is within a reasonable range, the voltage can be set to no higher than 127V AC; between the power network 30 and the impedance stabilization network 26 There is a The power filter 28 suppresses the electromagnetic noise generated during the operation of the test system.
  • the frequency conversion and speed regulation integrated machine 22 includes a casing 40 , a frequency converter 38 arranged on the top of the casing 40 , a motor 39 and an industrial computer 44 arranged inside the casing 40 , and the frequency converter 38 is respectively connected with the motor 39 and the industrial computer 44 .
  • Electrical connection; the casing 40 is located on one side of the motor 39 and has a double-layer structure.
  • the double-layer structure is provided with a folded water channel 41. One end of the folded water channel 41 is connected to the water pump 42, and the other end of the folded water channel 41 is connected to the water tank 43.
  • the water tank 43 and the water pump 42 are connected in series, and the water pump 42 is connected with the industrial computer 44; the arrangement of the turn-back water channel 41 is as follows: a number of straight water channels parallel to the axis of the motor 39 are arranged inside the double-layer structure, and several straight water channels are sequentially connected through curved channels to form Turn-back water channel 41 .
  • the frequency conversion and speed regulation integrated machine 22 integrates the frequency converter 38 and the motor 39 into one, the motor 39 and the frequency converter 38 are reasonably matched, the upper part is the frequency converter 38, and the lower part is the motor 39 nested in the casing 40, Internal cable connections, eliminating the need for exposed connecting cables.
  • the frequency converter 38 is controlled by the industrial computer 44 , and controls the frequency converter 38 to perform soft start and stepless speed regulation on the motor 39 .
  • the assembled shell 40 is a double-layered shell, with a water tank processed inside, and a turn-back water channel 41 is formed.
  • the structure of the turn-back water channel 41 is that the straight water channels are arranged in parallel along the axis direction of the housing 40, and one of the two ends of each straight water channel is turned and folded back.
  • the folded water channel 41 is connected in series with the water tank 43 and the water pump 42 respectively through water pipes.
  • the water pump 42 extracts the cooling liquid in the water tank 43 and circulates through the folded water channel 41.
  • the working principle of the electromagnetic signal test platform for the frequency conversion and speed regulation integrated machine 22 of the present invention is as follows:
  • the dynamometer 8-transmission 16-variable frequency speed regulation integrated machine 22 is running. By simulating two different actual working conditions of the variable frequency speed regulation integrated machine 22, test them respectively. Among them, the dynamometer 8-transmission 16 When set to low gear, the speed range of motor 39 of the test parameters of the inverter integrated machine is a small range, and the range of torque variation is a large range, that is, low gear, small speed and high torque; dynamometer 8-transmission 16 high gear When the motor 39 has a large range of rotation speed and a small range of torque variation, that is, under high-speed, high-speed, and low-torque conditions;
  • the voltage is given by the power supply network 30, the Hall voltage sensor 29, the power supply filter 28, the impedance stabilization network 26 and the motor controller 25, and the power supply network 30 and the impedance stabilization network 26 are adjusted to the motor 39.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

一种用于变频调速一体机的电磁信号测试平台，属于煤矿及矿山生产技术领域。所述用于变频调速一体机的电磁信号测试平台包括通过屏蔽墙隔开的操控室、暗室、屏蔽室一和屏蔽室二，操控室内设置有上位机、D/A转换器、显示屏和场强计，上位机分别与D/A转换器和显示屏连接；暗室内设置有变频调速一体机、EMC天线和电流探头；屏蔽室一内设置有EMI测试接收机，EMI测试接收机的输入端分别与场强计、EMC天线和电流探头连接，EMI测试接收机的输出端与上位机连接；屏蔽室二内设置有测功机和电源网络。所述用于变频调速一体机的电磁信号测试平台能够对变频调速一体机的电磁兼容性进行测试，能够判断变频调速一体机的可靠性，确保当前磁场强度不会影响工作人员的安全。

Description

一种用于变频调速一体机的电磁信号测试平台 技术领域
本发明涉及煤矿及矿山生产技术领域，特别涉及一种用于变频调速一体机的电磁信号测试平台。
 背景技术
目前，矿山大型设备主要采用“高压变频器+电机”的传动方式，存在变频器体积大，防护等级低，变频器到电动机输出电缆长，对沿线其它设备存在一些干扰，无法满足煤矿与其他矿山装备作业空间和恶劣环境的要求。如果将高压变频器与电机结合为一体，可以减小输出电缆长度，但是，矿山装备现场工况恶劣，且变频器和电动机之间温度相互影响，电磁信号之间存在相互干扰与抗干扰的兼容性问题，直接影响到变频调速一体机的工作可靠性与稳定性，因此，急需变频调速一体机多源信息感知系统和综合保护装置，实现对其温度、电压、堵转等故障的实时保护和运行趋势分析，以实现极高功率密度条件下设备的安全、可靠、长寿命运行。
 技术解决方案
为了解决现有技术存在的技术问题，本发明提供了一种用于变频调速一体机的电磁信号测试平台，对变频一体机的电磁兼容性进行测试，且能够采集变频调速一体机工作过程中的电压、转速、温度和扭矩信号，用以判断变频调速一体机的可靠性，同时确保当前磁场强度不会对工作人员的人身安全带来影响。
为了实现上述目的，本发明的技术方案是：
一种用于变频调速一体机的电磁信号测试平台，包括通过屏蔽墙分隔开的操控室、暗室、屏蔽室一和屏蔽室二；
所述操控室内设置有上位机、D/A转换器、显示屏和场强计，所述上位机分别与D/A转换器和显示屏连接；
所述暗室内设置有变频调速一体机、EMC天线和电流探头，所述变频调速一体机的电机依次与电机控制器和阻抗稳定网络连接；所述变频调速一体机的电机轴依次与变速器和测功机连接；所述变频调速一体机的外壁设置有温度传感器，所述电机轴设置有测速传感器，所述温度传感器和测速传感器均分别与D/A转换器连接；
所述屏蔽室一内设置有EMI测试接收机，所述EMI测试接收机的输入端分别与场强计、EMC天线和电流探头连接，所述EMI测试接收机的输出端与上位机连接；
所述屏蔽室二内设置有测功机和电源网络，所述电源网络依次与电源滤波器和阻抗稳定网络连接；所述测功机的输出轴设置有扭矩传感器，所述电源网络设置有电压传感器，所述扭矩传感器和电压传感器均分别与D/A转换器连接。
进一步的，所述变速器的输入轴通过设置有接地圈一的联轴器一与测功机的输出轴连接，所述变速器的输出轴通过设置有接地圈二的联轴器二与变频调速一体机的电机轴连接。
进一步的，所述联轴器一和联轴器二均由绝缘材料制成，避免轴电流对测试结果产生影响。
进一步的，所述变速器的输入轴通过壁板开关罩包络。
进一步的，所述用于变频调速一体机的电磁信号测试平台还设置有用于支撑变速器输入轴的基座一和用于支撑变速器输出轴的基座二。
进一步的，所述暗室内部四周设置高分子吸波材料，比如等离子材料，用于避免测试运行过程中产生的辐射频率和激励方式使屏蔽室产生谐振，大大减小测量误差。
进一步的，所述变频调速一体机包括外壳、设置于外壳顶部的变频器以及设置于外壳内部的电机和工控机，所述变频器分别与电机和工控机电连接。
进一步的，所述外壳位于电机的一侧为双层结构，所述双层结构内设置有折返式水道，所述折返式水道的一端与水泵连接，所述折返式水道的另一端与水箱连接，所述水箱和水泵串联，所述水泵与工控机连接。
进一步的，所述折返式水道的布置方式为：双层结构内部设置若干个与电机轴平行的直水道，若干个直水道通过弯水道依次连接形成折返式水道。
 有益效果
本发明的有益效果：
1）本发明的测试平台能够对变频调速一体机进行EMC测试，EMC测试对变频调速一体机电磁场干扰的大小与抗干扰能力进行测试，判断当前变频调速一体机工作的可靠性，同时也采集当前磁场的强度，确保当前磁场强度不会对工作人员的人身安全带来影响；
2）本发明的测试平台能够对变频调速一体机进行保护及显示功能测试，通过采集电压、转速和温度信号，并通过上位机内的计算机程序判断当前采集的信号是否与正常工作所需信号相符，并且要对显示模块进行检测保证变频调速一体机能够将当前情况及时向外界反馈，避免变频调速一体机运行过程中存在安全隐患；
3）本发明的变频调速一体机实现了机、电一体化，变频输出电缆长度近似为零，最大限度地减小了对其它设备的干扰，大幅度提高了大型装备电力传动的效率，颠覆了传统的电力传动方式。
本发明的其他特征和优点将在下面的具体实施方式中部分予以详细说明。
 附图说明
图1是本发明实施例提供的一种用于变频调速一体机的电磁信号测试平台的结构示意图；
图2是本发明实施例提供的变频调速一体机的结构示意图；
图3是本发明实施例提供的扭矩、温度、电压和转速的控制程序框图。
说明书附图中的附图标记包括：
1-暗室；2-屏蔽室一；3-屏蔽室二；4-操控室；5-屏蔽墙一；6-屏蔽墙二；7-屏蔽墙三；8-测功机；9-扭矩传感器；10-接地圈一；11-联轴器一；12-基座一；13-测试台一；14-壁板开关罩；15-基座二；16-变速器；17-联轴器二；18-接地圈二；19-测试台二；20-磁吸式温度传感器；21-脉冲式测速传感器；22-变频调速一体机；23-导线；24-高分子吸波材料；25-电机控制器；26-阻抗稳定网络；27-测试桌；28-电源滤波器；29-霍尔电压传感器；30-电源网络；31-EMC天线；32-电流探头；33-场强计；34-EMI测试接收机；35-D/A转换器；36-上位机；37-显示屏；38-变频器；39-电机；40-外壳；41-折返式水道；42-水泵；43-水箱；44-工控机。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。
在本发明的描述中，需要理解的是，术语“纵向”、“横向”、“竖向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“一”、“二”仅用于描述目的，而不能理解为指示或暗示相对重要性。
在本发明的描述中，除非另有规定和限定，需要说明的是，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是机械连接或电连接，也可以是两个元件内部的连通，可以是直接相连，也可以通过中间媒介间接相连，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。
为了解决现有技术存在的问题，如图1至图3所示，本发明提供了一种用于变频调速一体机22的电磁信号测试平台，包括通过屏蔽墙分隔开的操控室4、暗室1、屏蔽室一2和屏蔽室二3；
操控室4内设置有上位机36、D/A转换器35、显示屏37和场强计33，上位机36分别与D/A转换器35和显示屏37连接；
暗室1内设置有变频调速一体机22、EMC天线31和电流探头32，变频调速一体机22的电机39依次与电机控制器25和阻抗稳定网络26连接；变频调速一体机22的电机39轴依次与变速器16和测功机8连接；变频调速一体机22的外壁设置有温度传感器，电机39轴设置有测速传感器，温度传感器和测速传感器均分别与D/A转换器35连接；
屏蔽室一2内设置有EMI测试接收机34，EMI测试接收机34的输入端分别与场强计33、EMC天线31和电流探头32连接，EMI测试接收机34的输出端与上位机36连接；
屏蔽室二3内设置有测功机8和电源网络30，电源网络30依次与电源滤波器28和阻抗稳定网络26连接；测功机8的输出轴设置有扭矩传感器9，电源网络30设置有电压传感器，扭矩传感器9和电压传感器均分别与D/A转换器35连接。
如图1所示，暗室1、屏蔽室一2、屏蔽室二3和操控室4之间通过屏蔽墙隔开，其中，暗室1和屏蔽室一2之间通过屏蔽墙一5隔开，屏蔽室二3和操控室4之间通过屏蔽墙三7隔开，暗室1和屏蔽室一2与屏蔽室二3和操控室4之间通过屏蔽墙二6隔开。暗室1中设置有测试台二19，变频调速一体机22放置在测试台二19上，测试台二19采用金属材料并且接地，将干扰电流导向大地。测试台二19上有基座二15，用于支撑变速器16输出轴；变频调速一体机22电机39轴上装有脉冲式测速传感器21，用以测量变频调速一体机22电机39轴的转速，将数据通过导线23与D/A转换器35连接，并传输至上位机36，通过上位机36将数据投放至显示屏37，实时监测电机39轴的转速，具体的，上位机36内预置转速的合理区间范围，当转速位于合理区间内，显示屏37上显示转速数据正常；当转速不在合理区间范围内或发生堵转（电机39转速为0但仍然输出扭矩）等故障时，显示屏37显示转速数据异常，操作人员采取相应的紧急措施，对平台进行操控，对变频调速一体机22实时保护，预置转速的合理区间范围时，可设置为0-电机39最大转速之间。磁吸式温度传感器20吸附在变频调速一体机22的外壁表面，测量一体机机体表面的温度，磁吸式温度传感器20通过导线23与D/A转换器35连接，将温度数据传输至上位机36，上位机36将实时温度数据传输至显示屏37，上位机36内预置温度的合理区间范围，当温度位于合理区间内，显示屏37上显示温度数据正常，当温度不在合理区间范围内，显示屏37显示温度数据异常，此时人工干预操作，预置温度的合理区间范围时，可设置为温度不得高于当前室温＋50摄氏度；阻抗稳定网络26输出端与电机控制器25输入端连接，电机控制器25与变频调速一体机22的电机39部分连接，控制其稳定运行，阻抗稳定网络26与电机控制器25均放置在测试桌27上。屏蔽室二3中设置有测试台一13，测试台一13采用金属材料接地，其上设有基座一12，测功机8放置在测试台一13上，测功机8输出轴与扭矩传感器9连接，扭矩传感器9通过导线23与D/A转换器35连接，经模数转换后传输至上位机36，上位机36将实时扭矩数据传输至显示屏37，以便于测试工况的监测和控制，保证加载扭矩在合理区间内，具体的，上位机36内预置扭矩的合理区间范围，当扭矩位于合理区间内，显示屏37上显示扭矩数据正常；当扭矩不在合理区间范围内，显示屏37显示扭矩数据异常；扭矩传感器9与联轴器一11连接，联轴器一11与变速器16输入轴连接，并通过基座一12进行支撑；联轴器一11上装有接地圈一10，变速器16输入轴通过壁板开关罩14包络，均为避免轴电流对测试结果产生影响；变速器16输出轴通过装有接地圈二18的联轴器二17与变频调速一体机22的电机39轴连接；通过对变速器16档位进行调节，分别模拟变频调速一体机22的大扭矩和高转速的不同工况。
作为优选，变速器16的输入轴通过设置有接地圈一10的联轴器一11与测功机8的输出轴连接，变速器16的输出轴通过设置有接地圈二18的联轴器二17与变频调速一体机22的电机39轴连接；联轴器一11和联轴器二17均由绝缘材料制成，避免轴电流对测试结果产生影响；变速器16的输入轴通过壁板开关罩14包络；用于变频调速一体机22的电磁信号测试平台还设置有用于支撑变速器16输入轴的基座一12和用于支撑变速器16输出轴的基座二15。
作为优选，暗室1内部四周设置高分子吸波材料24，比如等离子材料，用于避免测试运行过程中产生的辐射频率和激励方式使屏蔽室产生谐振，大大减小测量误差。
本实施例中，场强计33、EMC天线31和电流探头32均分别通过导线23与EMI测试接收机34连接，具体的，EMI测试接收机34通过EMC天线31接收由变频调速一体机22和电机控制器25在测试实验中产生的不同频率的发射信号，用于对变频调速一体机22和电机控制器25的电磁兼容性能进行测试，EMC天线31包括EMI接收天线和EMS发射天线，EMS发射天线用于在变频调速一体机22周围一定空间内产生规定的电场或磁场，EMI接收天线主要用于测试 RE 辐射骚扰场强值，接收变频调速一体机22通过空间辐射发射出的骚扰信号；电流探头32用于测试导线23的骚扰，通过测量传导骚扰电流来评估，针对EMC天线31和电流探头32采集的信号，EMI测试接收机34向上位机36输出干扰信号的平均值频谱、峰值频谱和准峰值频谱；场强计33用于测量操控室4内的磁场强度，并输出至上位机36，上位机36内预置场强的合理区间范围，当场强位于合理区间内，显示屏37上显示场强数据正常；当场强不在合理区间范围内，显示屏37显示场强数据异常，此时人工干预操作，实时监测场强强度，确保不会对工作人员造成人身安全影响，预置场强的合理区间范围时，可设置为操控室4磁场强度不能超过50微特斯拉。
本实施例中，电源网络30用于电源线骚扰电压测试，电源网络30与霍尔电压传感器29连接，通过导线23与D/A转换器35连接，将电压数据传输至上位机36，上位机36将实时电压数据传输至显示屏37，上位机36内预置电压的合理区间范围，当电压位于合理区间内，显示屏37上显示电压数据正常；当电压不在合理区间范围内，显示屏37显示电压数据异常，人工干预操控，对变频调速一体机22进行保护，预置电压的合理区间范围时，可设置为电压不得高于127V交流电；电源网络30与阻抗稳定网络26之间设有电源滤波器28，抑制测试系统运行中产生的电磁噪声。
如图2所示，变频调速一体机22包括外壳40、设置于外壳40顶部的变频器38以及设置于外壳40内部的电机39和工控机44，变频器38分别与电机39和工控机44电连接；外壳40位于电机39的一侧为双层结构，双层结构内设置有折返式水道41，折返式水道41的一端与水泵42连接，折返式水道41的另一端与水箱43连接，水箱43和水泵42串联，水泵42与工控机44连接；折返式水道41的布置方式为：双层结构内部设置若干个与电机39轴平行的直水道，若干个直水道通过弯水道依次连接形成折返式水道41。
本实施例中，变频调速一体机22集成变频器38和电机39于一体，电机39和变频器38是合理匹配的，上部是变频器38，下部是嵌套于外壳40内的电机39，内部电缆连接，省去了暴露在外的连接电缆。变频器38由工控机44控制，控制变频器38对电机39进行软启动和无极调速。装配的外壳40为双层壳体，内部加工水槽，并形成折返式水道41，折返式水道41的结构是直水道沿外壳40轴线方向平行排列，每条直水道两端中的一端拐弯折回，往复多条，一直覆盖电机39外壳40。折返式水道41通过水管分别与水箱43和水泵42串联，水泵42抽取水箱43内冷却液，通过折返式水道41循环，由工控机44控制水泵42进行水冷散热工作。
本发明一种用于变频调速一体机22的电磁信号测试平台的工作原理如下：
（1）测功机8-变速器16-变频调速一体机22运转，通过模拟变频调速一体机22的两种不同的实际工况，分别对其测试，其中，测功机8-变速器16设置在低挡位时，变频一体机的测试参数的电机39转速范围是小范围，扭矩变化量的范围是大范围，即低档位小转速大扭矩工况；测功机8-变速器16高档位时，电机39转速范围是大范围，扭矩变化量范围是小范围，即高档位大转速低扭矩工况下；
（2）在运转过程中，通过电源网络30、霍尔电压传感器29、电源滤波器28、阻抗稳定网络26和电机控制器25给定电压，调节电源网络30和阻抗稳定网络26，向电机39发送信号给定相应的高压或低压电压；通过EMC天线31给定磁场信号干扰，并通过EMC天线31、电流探头32和EMI测试接收机34测试电磁兼容性；
（3）如图3所示，在测试的过程中，扭矩、温度、电压、场强和转速各传感器数据传输至上位机36后，上位机36分别与对应的预置合理区间比对，当其中之一数据不在合理区间范围，显示屏37显示对应的数据异常，进而进行人工干预，对变频调速一体机22进行实时保护。
尽管已经示出和描述了本发明的实施例，本领域的普通技术人员可以理解：在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。

Claims (9)

  1. 一种用于变频调速一体机的电磁信号测试平台，其特征在于，包括通过屏蔽墙分隔开的操控室、暗室、屏蔽室一和屏蔽室二；
    所述操控室内设置有上位机、D/A转换器、显示屏和场强计，所述上位机分别与D/A转换器和显示屏连接；
    所述暗室内设置有变频调速一体机、EMC天线和电流探头，所述变频调速一体机的电机依次与电机控制器和阻抗稳定网络连接；所述变频调速一体机的电机轴依次与变速器和测功机连接；所述变频调速一体机的外壁设置有温度传感器，所述电机轴设置有测速传感器，所述温度传感器和测速传感器均分别与D/A转换器连接；
    所述屏蔽室一内设置有EMI测试接收机，所述EMI测试接收机的输入端分别与场强计、EMC天线和电流探头连接，所述EMI测试接收机的输出端与上位机连接；
    所述屏蔽室二内设置有测功机和电源网络，所述电源网络依次与电源滤波器和阻抗稳定网络连接；所述测功机的输出轴设置有扭矩传感器，所述电源网络设置有电压传感器，所述扭矩传感器和电压传感器均分别与D/A转换器连接。
  2. 根据权利要求1所述的用于变频调速一体机的电磁信号测试平台，其特征在于，所述变速器的输入轴通过设置有接地圈一的联轴器一与测功机的输出轴连接，所述变速器的输出轴通过设置有接地圈二的联轴器二与变频调速一体机的电机轴连接。
  3. 根据权利要求2所述的用于变频调速一体机的电磁信号测试平台，其特征在于，所述联轴器一和联轴器二均由绝缘材料制成。
  4. 根据权利要求2或3所述的用于变频调速一体机的电磁信号测试平台，其特征在于，所述变速器的输入轴通过壁板开关罩包络。
  5. 根据权利要求2或3所述的用于变频调速一体机的电磁信号测试平台，其特征在于，还设置有用于支撑变速器输入轴的基座一和用于支撑变速器输出轴的基座二。
  6. 根据权利要求1所述的用于变频调速一体机的电磁信号测试平台，其特征在于，所述暗室内部四周设置高分子吸波材料。
  7. 根据权利要求1所述的用于变频调速一体机的电磁信号测试平台，其特征在于，所述变频调速一体机包括外壳、设置于外壳顶部的变频器以及设置于外壳内部的电机和工控机，所述变频器分别与电机和工控机电连接。
  8. 根据权利要求7所述的用于变频调速一体机的电磁信号测试平台，其特征在于，所述外壳位于电机的一侧为双层结构，所述双层结构内设置有折返式水道，所述折返式水道的一端与水泵连接，所述折返式水道的另一端与水箱连接，所述水箱和水泵串联，所述水泵与工控机连接。
  9. 根据权利要求8所述的用于变频调速一体机的电磁信号测试平台，其特征在于，所述折返式水道的布置方式为：双层结构内部设置若干个与电机轴平行的直水道，若干个直水道通过弯水道依次连接形成折返式水道。
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