| Quantity: | |
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（1）Pure & Stable Electromagnetic Environment
All loading equipment is arranged outside the anechoic chamber to eliminate stray electromagnetic interference. It maintains ultra-low and stable background noise, fully meeting CISPR 25 Class 5 highest-level test requirements with high repeatable test data.
（2）Dedicated for Split-type Motor Testing
Specially designed for standalone motors and split motor-electric control systems, it adapts to all mainstream vehicle drive motors. It accurately simulates full dynamic driving conditions and complies with national test specifications to ensure authentic and valid test results.
（3）High-precision 4-quadrant Dynamic Loading
Equipped with regenerative 4-quadrant dynamometer units, it features fast torque and speed response, covering full motor test range. It restores real vehicle dynamic working conditions, realizes accurate matching of EMI noise and operating status, and reduces long-term test energy consumption via power regeneration.
（4）Full Global Standard Compliance
Fully compliant with CISPR 25, GB/T 18655, ECE R10 and other mainstream standards, covering complete EMC test items. Standardized installation and wiring ensure traceable and reproducible data, satisfying CNAS, CMA certification and vehicle type approval requirements.
（5）High Reliability & Low Operating Cost
The mature external structure ensures high stability and low failure rate for long-term testing. The streamlined layout simplifies installation and daily maintenance. With independent R&D core components, it features shorter delivery cycle, lower cost and efficient localized after-sales service compared with imported equipment
External fixed e-motor EMC test benches have an excellent dynamometer outside the anechoic chamber, and connect to the test object by the EMC drive shaft.
Type | nmax (rpm) | Trated (N.m) | Prated(kW) | nrtated(rpm) | n2(rpm) | Pmax (kW)@ nmax | Cooling |
EMD-A250-15 | 12000 | 500 | 250 | 4773 | 1200 | 250 | Air |
EMD-B300-12 | 12000 | 1000 | 300 | 2865 | 12000 | 300 | Air |
EMD -C400-10 | 10000 | 2500 | 400 | 1528 | 7000 | 300 | Air |
EMD -C350-08 | 8000 | 3000 | 350 | 1114 | 7000 | 300 | Air |
EMD-D350-07 | 7000 | 2000 | 350 | 1671 | 6000 | 300 | Air |
EMD-E450-06 | 6000 | 4000 | 450 | 1074 | 4000 | 300 | Air |
EMD-F500-06 | 6000 | 5000 | 500 | 955 | 4000 | 300 | Air |
Note. JKT can provide customized EMC test benches to meet special requirements, such as EMC test benches for aerospace generators. By installing a high-speed gearbox inside the anechoic chamber and connecting it to the EMC drive shaft, the maximum speed can reach 30,000 rpm or even higher.
Test benches test electric motor of the electric vehicles (EVs), for example electronic motors, electric suspension drive motors, etc.
Main test contents:
（1）Conducted Emission test
（2）Radiated Emission test
（3）Standard: GB/T 18655 & CISPR25
Example top view
Dynamometer & Mechanical System: A high-dynamic asynchronous or synchronous motor is selected as the dynamometer, equipped with an EMC drive shaft system and precision, reliable mechanical components. The dynamometer installed outside the anechoic chamber.
Frequency Converter: A four-quadrant frequency converter is adopted for dynamic or steady-state control of the dynamometer. It enables control of rotational speed, torque, allowing the dynamometer to operate in either motoring or generating mode.
Battery Simulator or Bidirectional DC Power Supply: Simulates an on-board battery pack to supply power to the inverter and the motor. The DC power connects to HV filter outside the anechoic chamber, and then connect to HV AN by HV lines.
MCU Power Supply: Provides a low-voltage power supply for the motor controller. Customer can also select the battery which put on the test table.
Test Object Cooling System: Supplies cooling medium for the tested E-axle and E-drive. An oil or water-cooling system is available for certain oil-cooled or water-cooled test pieces. Parameters including temperature, pressure and flow rate of the cooling system are fully adjustable. The water-cooling system can also use ethylene glycol as the cooling medium. The cooling system is connected to the fluid waveguides mounted on the wall of the anechoic chamber.
Automated Measurement & Control System: Conducts overall control and condition monitoring of the entire motor test bench.
250kW 12000rpm 500N.m EMC Test bench for EV motor
Q 1: What is the biggest advantage of the external fixed e-motor EMC test bench compared with built-in benches?
A1: Its core advantage is ultra-pure and stable electromagnetic environment. All dynamometer loading equipment is placed outside the anechoic chamber, with only standard specimens and wiring inside. It fundamentally eliminates stray electromagnetic interference from dynamometers and inverters, avoids high background noise and data fluctuation of built-in benches. It stably meets CISPR 25 Class 5 high-grade test standards with superior test repeatability and reliability.
Q 2: How to select between this fixed bench and the mobile e-axle test bench?
A2: The two benches are designed for differentiated test scenarios. This external fixed bench is specially applied to split-type motors, standalone motor monomers and split motor-ECU systems. Its single-axis loading complies with national motor test standards, featuring high accuracy and stability for mass motor R&D and certification tests. The mobile bench is dedicated to integrated e-axles and supports dual-axis differential working conditions. Choose this fixed bench for single motor tests, and the mobile bench for integrated e-axle tests.
Q 3: Can this domestic external test bench support CNAS/CMA accredited certification tests?
A3: Yes, it fully supports accredited tests. The bench is fully compliant with mainstream domestic and international EMC standards including CISPR 25, GB/T 18655 and ECE R10, covering all conducted emission, radiated emission and immunity test items. Standardized specimen installation, grounding and wiring layout, together with high-precision synchronous measurement system, ensure traceable and reproducible test data. It completely meets the accreditation requirements of CNAS and CMA laboratories and vehicle type approval demands, capable of replacing imported equipment for official certification tests.
