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ACD-400KW/110KW AC power dynamometer
Host introduction: Test the power performance, efficiency characteristics, and safety protection functions of the electric drive system to evaluate th
Product details
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ACD-400KW/110KWalternating current electrodynamometer
Comprehensive Performance Testing System for Electric Vehicle Motors and Controllers |
1、 Project Description
1. Including from the power input switch cabinet incoming terminal to the test motor junction box (excluding the test motor on the test bench from the junction box).
2. Including the design, construction, installation, commissioning, acceptance, personnel training, and other follow-up services of the power system, power supply and distribution system, control system, measurement system, and grounding system (excluding the design and construction of the civil engineering specialty of the testing system, but should provide design drawings of the civil engineering technical conditions required for the civil engineering specialty design, excluding individual instruments, equipment, and mechanical components specifically indicated).
3. The design of the test-bed should first ensure maturity and reliability, select mature technology and mature equipment, follow the principles of standardization, generalization, componentization, progressiveness, and security, so it is easy to install, debug, train, and maintain the equipment later.
2、 Environmental conditions
1. Environmental temperature: -10 to+45 ℃
2. Relative humidity: ≤ 90%
3. Altitude: ≤ 1000m
4. Location of use: Indoor
5. Power supply voltage: 380V ± 10%,
6. Grounding requirement: There must be an independent grounding wire (impedance ≤ 4 Ω)
7. Power supply system connection: manually operated disconnect device
8. Stay away from electromagnetic interference and mechanical vibration sources on site
9. There shall be no excessive dust, acid, alkali, salt, corrosive or explosive gases in the air
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3、 System Overview
This AC electric dynamometer test bench is suitable for performance research and assessment testing of electric vehicle motors and controllers, providing accurate and reliable test charts and data as a basis for testing the power performance, efficiency characteristics, and safety protection functions of electric drive systems. It evaluates the performance of electric drive system products and conducts research on vehicle motor control strategies by simulating actual vehicle operating conditions. This system is mainly used for testing the performance, medium temperature and temperature rise, motor torque characteristics and efficiency of electric vehicle motors and controllers. Main test contents: motor no-load test, load efficiency test, locked rotor test, motor temperature, motor temperature rise, overload capacity test, maximum working speed, overspeed test, motor controller protection test, etc.
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4、 Main features
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Constant torque loading below the rated speed of the dynamometer; Load at a constant power above the rated speed, and display the torque speed curve and efficiency speed curve on an industrial computer.
◆ Testing of motor power generation performance: The testing system can set the load motor power generation efficiency for controller testing.
The rated working voltage of the frequency converter is 380V, and it is air-cooled.
The frequency converter has good input harmonic suppression function, and the harmonics within the entire speed range do not affect other electrical equipment or control and communication systems.
The frequency converter is designed and manufactured in accordance with national standards, international standards, and industry standards such as GB, ISO, IEO, IEEE, etc.
The frequency converter adopts IGBT power components, and the power components are selected from ABB products.
The frequency converter has good speed regulation and low-speed operation performance, with a frequency regulation accuracy of 0.1HZ and a stability of 0.5%, and has good loading characteristics.
◆ Has anti drag performance.
◆ It has protection functions such as overcurrent, overvoltage, undervoltage, phase loss, short circuit, overclocking, stall, overheating of power components, and instantaneous power outage.
The data measurement system adopts two display modes: computer automatic acquisition and instrument display.
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Automatically collect input and output three-phase voltage, three-phase current, phase power, power factor, total power, total power factor, frequency, speed, torque and other test data; Automatically save and process data; Draw curves and automatically generate printed test reports; Establish a test database and product quality statistics table, and the query method should be convenient and fast.
The test report can be automatically generated during the testing process or manually inputted, and its format is agreed upon by both parties. The report should be prepared using the most convenient computer language currently available, which is easy for manual operation, including manual participation functions such as adjusting certain data.
The accuracy of the measuring instrument should meet the standard requirements for testing the power of the driving motor.
The system uncertainty shall not be less than 0.5%.
The accuracy of the torque speed sensor should not be lower than level 0.2, and it is required to have high dynamic stability.
The measurement of input power (voltage, current, power, etc.) and output power (three-phase voltage, current, power, etc.) is carried out using a high-precision power analyzer, Yokogawa WT3000 from Japan, with an accuracy of 0.01 level.
The measurement system and control system must be equipped with backup software CDs.
Sampling time: Set the sampling time arbitrarily (20ms~1000ms) to meet the high-speed measurement needs of users.
◆ Range and number of teeth setting: Users set the range based on the torque range and speed of the dynamometer itself, as well as the number of teeth on the gear plate or photoelectric encoder.
Hub function (station number selection): When configuring multiple (≥ 2) dynamometer machines, users can choose the VG2218C-JXQ type 8-way hub. The designated dynamometer (or station) can be selected by computer software or VG2218C operation, and the hub automatically switches the corresponding signal to avoid operational errors and safety caused by frequent plugging and unplugging of signal ports during dynamometer station replacement.
◆ Automatic calibration and calibration function: In addition to retaining manual calibration (including positive full-scale, negative full-scale, and zero adjustment) functions, users can automatically calibrate the entire process of the dynamometer on the computer. The calibration process is clear, and calibration data can be stored on the computer. Calibration data tables can be automatically generated and printed out.
◆ Synchronous sampling of motor operation input and output parameters: input voltage, current, power, power factor, frequency and output torque, speed, input power, efficiency. Having synchronous sampling during measurement ensures data consistency.
◆ Dynamometer loading method: In addition to the traditional manual excitation loading method, this system has multiple automatic loading methods: fixed excitation incremental loading method, fixed torque incremental loading method, fixed speed incremental loading method, fixed torque loading method, fixed speed loading method, and fixed slope loading method.
The powerful system function self check and rapid on-site fault diagnosis capability are important indicators that the new generation of high-performance dynamometer systems must possess. By using the Wig portable dynamometer signal detection tool, it is possible to quickly determine the source (point) of the fault by detecting the input and output signal size of each module unit (such as sensors, acquisition boards, dynamometer controllers, etc.) of the dynamometer system on site, which can greatly improve the system's service capability and efficiency.
The application of multi-level electromagnetic compatibility (EMC) technology (such as grounding, shielding, isolation, filtering, etc.) and the guarantee of good manufacturing processes. Ensure the reliability and anti-interference ability of the system, and the system can operate stably and reliably in environments with interference, sparks, high frequency, high voltage, and strong electrical shocks. Especially in most current environments, there is radiation from high-frequency power electronic devices, making it particularly necessary to resist electromagnetic interference.
The electric dynamometer system focuses on the current motor energy efficiency certification and high-precision testing, therefore the system needs to have consistency in overall accuracy and excellent measurement repeatability. According to the characteristics of the usage scenario of the dynamometer system (the workplace is not equipped with air conditioning, and the ambient temperature cannot be guaranteed), it is necessary to improve the working temperature range of all module units and instruments in the dynamometer system under measurement accuracy (considering 0 ℃~50 ℃), and solve the problem that is easily overlooked by users in terms of ambient temperature (i.e. poor efficiency measurement repeatability in summer and winter).
5、 According to the standard
1. GB/T18488.1-2015 "Technical Conditions for Test Methods of Electric Motors and Controllers for Electric Vehicles"
2. GB/T18488.2-2015 "Test Methods for Motors and Controllers for Electric Vehicles"
3. GB/T18488.1-2006 "Technical Conditions for Test Methods of Electric Motors and Controllers for Electric Vehicles"
4. GB/T18488.2-2006 "Test Methods for Motors and Controllers for Electric Vehicles"
5. GB/T755-2008 "Rating and Performance Test Methods for Rotating Electrical Machines"
6. GB/T1029-2006 Test Methods for Three phase Synchronous Motors
7. GB/T1032-2005 "Test Methods for Three phase Asynchronous Motors"
8. GB/T 18385-2005 "Test Methods for Power Performance of Electric Vehicles"
9. GB/T 19752-2005 "Test Method for Power Performance of Hybrid Electric Vehicles"
10. GB/T 18384.1-2001 "Safety Requirements for Electric Vehicles - Part 1: On Board Energy Storage Devices"
11. GB/T 18384.2-2001 "Safety Requirements for Electric Vehicles Part 2: Functional Safety and Fault Protection"
12. GB/T 18386-2005 "Test Method for Energy Consumption Rate and Range of Electric Vehicles"
13. GB/T 50054-95 "Code for Design of Low Voltage Distribution"
14. GB/T 50055-93 "Design Specification for Distribution of General Electrical Equipment"
15. GB/T 29307-2012 "Reliability Test Methods for Drive Motor Systems of Electric Vehicles"
6、 Test project
Motor no-load characteristic test
ü Motor load characteristic test
Working characteristics of motor A
Mechanical characteristics of B motor (torque speed curve)
C motor efficiency, controller efficiency, and electrical control system efficiency
Motor stalling characteristic test
A stalling torque and stalling current
Maximum operating speed test
Overspeed test
Motor and its controller protection testing
ü Feed test
Durability test
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