CN111505501A - Motor dynamic loading and transient testing device - Google Patents
Motor dynamic loading and transient testing device Download PDFInfo
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- CN111505501A CN111505501A CN202010413209.6A CN202010413209A CN111505501A CN 111505501 A CN111505501 A CN 111505501A CN 202010413209 A CN202010413209 A CN 202010413209A CN 111505501 A CN111505501 A CN 111505501A
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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
- G01R31/34—Testing dynamo-electric machines
Abstract
The invention relates to a motor dynamic loading and transient testing device, which comprises an MCU module and an FPGA module; the MCU module and the FPGA module are connected through an FSMC bus, so that the MCU can synchronize data information to the FPGA and directly address information stored in the FPGA. The MCU module is in data communication with an external upper computer through the Ethernet; the system is used for processing data from an upper computer and the FPGA; the FPGA module comprises a signal output module, a signal acquisition module and a signal storage module, wherein the signal output module is used for providing a motor control signal for an external motor server; the signal acquisition module is used for acquiring motor working signals fed back by the servo motor in real time; the signal storage module is used for storing motor control signals and motor working signals fed back by the servo motor. Through the device, the loading of any load waveform of the motor can be realized, the requirements of load tests under different working conditions are met, and the requirements of transient tests of the motor are met.
Description
Technical Field
The invention relates to the field of motor performance testing, in particular to a dynamic loading and transient testing device for a motor.
Background
As is well known, a motor is a crystal integrating electrical and mechanical properties, and many results of experimental items are often required to evaluate the performance of a motor, and generally, a motor needs to undergo two stages of a type test (development, pilot test, quality inspection) and a production test (delivery) from development to production, and ten or even dozens of experimental items are included in total according to the type of the motor and the difference of application industries, as shown in fig. 1. In the test items, most of the test items need to be tested in a load state, and the load of the tested motor is loaded to simulate the actual operation condition of the tested motor so as to detect whether the performance parameters of the motor meet the design requirements.
At present, an electric dynamometer system is commonly used in actual production to simulate mechanical load so as to detect whether performance parameters of a motor meet requirements or not. During testing, the dynamometer is coaxially connected with the tested motor, various loads are loaded on the tested motor through the dynamometer control system, parameters such as torque, rotating speed, current, voltage, power and efficiency of the motor in actual operation can be simulated, and other special power test items such as safety tests, dynamic balance tests and NVH (vibration noise and harshness) tests can be performed. For the conventional test items, when a tested motor is loaded, the load is gradually reduced from 150% of rated load to 25% of rated load, at least 6 test points are selected during the process, but the test points must contain 100% of rated load points, and then the voltage, the current, the power, the torque, the rotating speed and other parameters of the test points are tested and calculated, and the point-by-point loading mode can meet the requirements of the conventional test.
In recent years, with the continuous expansion of the application range of the motor, in addition to the above conventional project test, the requirement for the transient performance test of the motor is also increased, and the key technical points for the transient performance test of the motor and the driver mainly include the following two aspects:
1. loading function of arbitrary load curves. I.e. it may provide a step, sine wave, square wave, saw tooth wave, or even arbitrary waveform loading of torque or rotational speed.
2. And measuring transient waveforms of various parameters, including torque, rotating speed, voltage, current, efficiency, rotating speed-torque curve and the like.
Obviously, the traditional dynamometer system can only load one by one, and only measures the motor performance parameters aiming at a certain load point, so that the transient performance test of the motor cannot be met.
Therefore, it is necessary to provide a dynamic loading and transient testing device for a motor, which can test the transient performance of the motor by loading any load curve during the testing process of the motor.
Disclosure of Invention
The invention provides a dynamic motor loading and transient testing device, which aims to solve the problems that the conventional electric dynamometer only can load one by one load point, only measures the performance parameters of a motor by a certain load point and cannot meet the requirement of testing the transient performance of the motor.
The invention provides a motor dynamic loading and transient testing device which comprises an MCU module and an FPGA module, wherein the MCU module is connected with the FPGA module through an FSMC bus, so that the MCU can synchronize data information to the FPGA and directly address information stored in the FPGA, wherein the MCU module is used for synchronizing data information to the FPGA and directly addressing the information stored in the FPGA
The MCU module comprises a data communication module and a data processing module, and the data communication module is in data communication with an external upper computer through the Ethernet; the data processing module is used for processing data from the upper computer and the FPGA;
the FPGA module comprises a signal output module, a signal acquisition module and a signal storage module, wherein the signal output module is used for providing a motor control signal for a server of an external motor; the signal acquisition module is used for acquiring motor working signals fed back by the servo motor in real time; the signal storage module comprises a control signal register and a result signal register; the control signal register is used for storing the motor control signal; the result signal register is used for storing the motor working signal,
when data goes down, the MCU module receives and analyzes Ethernet protocol data sent by the upper computer to obtain the motor control signal and synchronizes the motor control signal to a control signal register of the FPGA through the FSMC bus, and the FPGA module sends the motor control signal to the server to drive the external motor to work;
when data go upward, the FPGA module collects and stores motor working signals of the server, and the MCU module reads the motor control signals, processes the motor control signals into Ethernet protocol data and sends the Ethernet protocol data to the upper computer, so that the upper computer can process and display the real-time working state of the motor.
Preferably, the signal output module outputs a signal with a time stamp to the external motor server, and the signal is counted as a first time value; the motor working signal acquired by the signal acquisition module is provided with a timestamp and is counted as a second time value.
Preferably, the FPGA module further includes a time processing module, and the time processing module is configured to calculate a difference between the first time value and the second time value, and record the difference as a transient response time of the servo motor.
Preferably, the signal output module comprises a first signal output module and a second signal output module; the first signal output module outputs waveform pulses, and the waveform pulses are used for controlling the rotating speed and the torque of an external servo motor; and the second signal output module outputs counting pulses, and the counting pulses are used for controlling the position of the external servo motor.
Preferably, the waveform pulse includes a step pulse, a sine wave pulse, a triangular wave pulse, and a square wave pulse.
Preferably, the signal acquisition module comprises a first signal acquisition module and a second signal acquisition module; the first signal acquisition module is used for acquiring analog signals fed back by the peripheral servo motor, and the second signal acquisition module is used for acquiring pulse digital signals fed back by the peripheral servo motor.
Preferably, the signal processing module is further included, and is configured to perform signal conditioning on the output signal and the input signal of the FPGA module.
Preferably, the signal processing module includes: a D/A module and an A/D module; the D/A module is used for converting the motor control signal output by the FPGA module from digital quantity to analog quantity and transmitting the analog quantity to a server of an external motor; the A/D module is used for converting signals fed back by an external servo motor into digital quantity from analog quantity and transmitting the digital quantity to the FPGA module.
Preferably, the signal acquisition module further comprises a signal adjustment module, and the signal adjustment module is used for adjusting the motor control signal output by the signal output module in real time according to the signal acquired by the first acquisition module.
The invention has the beneficial effects that:
1. the MCU module receives and analyzes Ethernet protocol data sent by an upper computer to obtain a motor control signal, and the motor control signal is sent to a control signal register of an FPGA by a synchronous FPGA module through an FSMC bus to a server to drive an external motor to work; then, the FPGA module collects and stores working signals of the servo motor, and the MCU module reads the motor control signals, processes the motor control signals into Ethernet protocol data and sends the Ethernet protocol data to the upper computer, so that the upper computer can process and display the real-time working state of the motor; any load waveform can be loaded through the device, and the motor is controlled to rotate; the signal acquisition module can carry out real-time collection to servo motor signal of working, and then realizes the measurement to motor transient state parameter, realizes the test to motor transient state performance.
2. The testing device is provided with the time processing module, so that the transient response time of the tested motor can be obtained.
3. The testing device is provided with the signal adjusting module, so that the control signal of the tested motor can be adjusted in real time, and the precise control of the tested motor is realized.
Drawings
FIG. 1 is a schematic diagram of a motor test project;
FIG. 2 is a schematic structural diagram of a control device for testing a motor;
in the figure: 1: an upper computer; 2: an MCU module; 21: a data communication module; 22: a data processing module; 3: an FPGA module; 31, a signal output module; 32, a signal acquisition module; 33, a signal storage module; 4: servo motor
Detailed Description
The present invention will be described in detail with reference to the specific embodiments shown in the drawings, which are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to the specific embodiments are included in the scope of the present invention.
As shown in fig. 2, the dynamic loading and transient testing device for the motor comprises an MCU module 2 and an FPGA module 3; the MCU module 2 and the FPGA module 3 are connected through an FSMC bus, so that the MCU can synchronize data information with the FPGA and directly address information stored in the FPGA, wherein
The MCU module 2 comprises a data communication module 21 and a data processing module 22, and the data communication module 21 is in data communication with an external upper computer 1 through Ethernet; the data processing module 22 is used for processing data from an upper computer and the FPGA;
the FPGA module 3 comprises a signal output module 31, a signal acquisition module 32 and a signal storage module 33, wherein the signal output module 31 is used for providing a motor control signal for a server of an external motor; the signal acquisition module 32 is used for acquiring a motor working signal fed back by the servo motor in real time; the signal storage module 33 includes a control signal register and a result signal register; the control signal register is used for storing motor control signals; the result signal register is used for storing motor working signals,
when data goes down, the MCU module 2 receives and analyzes Ethernet protocol data sent by an upper computer to obtain a motor control signal and synchronizes the motor control signal to a control signal register of the FPGA module 3 through the FSMC bus, and the FPGA module 3 sends the motor control signal to a server to drive the external motor to work;
when data go upward, the FPGA module 3 collects and stores a motor working signal of the server, and the MCU module 2 reads the motor control signal and processes the motor control signal into Ethernet protocol data to be sent to an upper computer, so that the upper computer can process and display the real-time working state of the motor.
In order to obtain the transient response time of the servo motor, the FPGA module further comprises a time processing module, and the signal output module 31 has a timestamp on a signal output by the server of the external motor and is counted as a first time value; the motor working signal collected by the signal collecting module 32 has a timestamp and is counted as a second time value, and the time processing module is used for calculating a difference value between the first time value and the second time value and recording the difference value as the transient response time of the servo motor.
In order to control the servo motor in different manners, the signal output module 31 includes a first signal output module and a second signal output module; the first signal output module outputs any waveform pulse for controlling the rotating speed and the torque of the external servo motor; the second signal output module outputs counting pulses for controlling the rotation angle position of the peripheral servo motor.
Preferably, the waveform pulse includes a step pulse, a sine wave pulse, a triangular wave pulse and a square wave pulse.
When the rotating speed and the torque of the servo motor need to be controlled, any load waveform information loaded on the upper computer is sent to a data processing module in the MCU module 2 through the Ethernet to be subjected to data analysis processing, analog control signals of the rotating speed and the torque are converted into digital quantity control signals, the digital quantity control signals are transmitted to a first signal output module of the FPGA module 3 through an FSMC data bus, the digital quantity control signals output by the first signal output module need to be converted into analog quantity voltage signals through a D/A module in the signal processing module to be output, and the analog quantity voltage signals serve as control signals of a servo of the motor to drive the motor to rotate.
When the rotation angle position of the servo motor needs to be controlled, the pulse number is set on the upper computer, the pulse number is sent to the data processing module in the MCU module 2 through the Ethernet to carry out data analysis processing, a pulse signal is transmitted to the second signal output module of the FPGA module 3 through the FSMC data bus, and the pulse quantity output by the second signal output module is used as a control signal of a servo of the motor to control the rotation angle of the motor.
The rotating speed and torque signals of the motor fed back by the rotating speed and torque sensors after the servo motor rotates are in two forms, one is an analog quantity voltage signal, and the other is a TT L pulse signal, so a first signal acquisition module and a second signal acquisition module are correspondingly designed for the signal acquisition modules, the first signal acquisition module is used for acquiring analog voltage signals fed back by an external servo motor, and the second signal acquisition module is used for acquiring pulse signals fed back by the external servo motor.
If the sensor feedback signal is a TT L pulse signal, the analog voltage signal is directly input to a second signal acquisition module;
in order to accurately control the servo motor, a signal processing module is further designed in the control device, and signals output by the signal output module are subjected to D/A conversion, voltage following, filtering and functional amplification in the signal processing module and then output control signals to drive the motor to rotate;
the signals fed back by the sensor also comprise a plurality of interference signals which can also influence the precision of the control device, so the signals fed back by the sensor enter the signal acquisition module after being subjected to signal voltage division, filtering, functional amplification and A/D conversion by the signal processing module.
According to an optimal scheme, for more accurate control of the motor, the signal acquisition module further comprises a signal adjusting module, the signal adjusting module is used for adjusting a motor control signal in real time, and adjusting a control signal output by the signal output module to the motor server according to a signal fed back by the servo motor received by the signal acquisition module, so that accurate control of the motor is realized.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (9)
1. The device is characterized by comprising an MCU module and an FPGA module, wherein the MCU module is connected with the FPGA module through an FSMC bus, so that the MCU can synchronize data information with the FPGA and directly address information stored in the FPGA, wherein the MCU module is used for synchronizing data information with the FPGA and directly addressing the information stored in the FPGA
The MCU module comprises a data communication module and a data processing module, and the data communication module is in data communication with an external upper computer through the Ethernet; the data processing module is used for processing data from the upper computer and the FPGA;
the FPGA module comprises a signal output module, a signal acquisition module and a signal storage module, wherein the signal output module is used for providing a motor control signal for a server of an external motor; the signal acquisition module is used for acquiring motor working signals fed back by the servo motor in real time; the signal storage module comprises a control signal register and a result signal register; the control signal register is used for storing the motor control signal; the result signal register is used for storing the motor working signal,
when data goes down, the MCU module receives and analyzes Ethernet protocol data sent by the upper computer to obtain the motor control signal and synchronizes the motor control signal to a control signal register of the FPGA through the FSMC bus, and the FPGA module sends the motor control signal to the server to drive the external motor to work;
when data go upward, the FPGA module collects and stores motor working signals of the server, and the MCU module reads the motor control signals, processes the motor control signals into Ethernet protocol data and sends the Ethernet protocol data to the upper computer, so that the upper computer can process and display the real-time working state of the motor.
2. The dynamic loading and transient testing apparatus of an electric machine of claim 1, wherein: the signal output module is used for outputting a signal with a time stamp to an external motor server and counting the time stamp as a first time value; the motor working signal acquired by the signal acquisition module is provided with a timestamp and is counted as a second time value.
3. The dynamic loading and transient testing apparatus of an electric machine of claim 2, wherein: the FPGA module further comprises a time processing module, and the time processing module is used for calculating the difference value between the first time value and the second time value and recording the difference value as the transient response time of the servo motor.
4. The dynamic loading and transient testing apparatus of an electric machine of claim 1, wherein: the signal output module comprises a first signal output module and a second signal output module; the first signal output module outputs waveform pulses, and the waveform pulses are used for controlling the rotating speed and the torque of an external servo motor; and the second signal output module outputs counting pulses, and the counting pulses are used for controlling the position of the external servo motor.
5. The dynamic loading and transient testing apparatus of an electric machine of claim 4, wherein: the waveform pulses include step pulses, sine wave pulses, triangular wave pulses, and square wave pulses.
6. The dynamic loading and transient testing apparatus of an electric machine of claim 1, wherein: the signal acquisition module comprises a first signal acquisition module and a second signal acquisition module; the first signal acquisition module is used for acquiring analog signals fed back by the peripheral servo motor, and the second signal acquisition module is used for acquiring pulse digital signals fed back by the peripheral servo motor.
7. The dynamic loading and transient testing apparatus of an electric machine of claim 1, wherein: the signal processing module is used for conditioning the output signals and the input signals of the FPGA module.
8. The dynamic loading and transient testing apparatus of an electric machine of claim 7, wherein: the signal processing module comprises: a D/A module and an A/D module; the D/A module is used for converting the motor control signal output by the FPGA module from digital quantity to analog quantity and transmitting the analog quantity to a server of an external motor; the A/D module is used for converting signals fed back by an external servo motor into digital quantity from analog quantity and transmitting the digital quantity to the FPGA module.
9. The dynamic loading and transient testing apparatus of an electric machine of claim 1, wherein: the signal acquisition module further comprises a signal adjusting module, and the signal adjusting module is used for adjusting the motor control signal output by the signal output module in real time according to the signal acquired by the first acquisition module.
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| CN202010413209.6A CN111505501A (en) | 2020-05-15 | 2020-05-15 | Motor dynamic loading and transient testing device |
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Cited By (2)
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| CN111880096A (en) * | 2020-08-21 | 2020-11-03 | 北京机械设备研究所 | Multi-axis electric drive system loading test system and test method |
| CN112763910A (en) * | 2020-12-30 | 2021-05-07 | 广东电网有限责任公司清远供电局 | Device and method for monitoring load of electric equipment |
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