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Free-standing e-axes EMC test benches enable testing of the e-axes the anechoic chamber, and have excellent EMC performance.
（1）Free-standing mobile architecture
No embedded foundation or wall penetration for the semi anechoic chamber. The whole unit can be moved in/out of the chamber to maximize chamber utilization for multi specimen testing.
（2）Independent dual axle 4 quadrant loading
Separate speed/torque control for left & right output shafts; simulates straight driving, cornering, slip and regenerative braking, avoiding inaccurate results caused by locking one axle.
（3）Low EMI leakage integrated design
Shielded dynamometer assembly and proprietary EMC drive shafts prevent external noise contamination, maintaining low background noise for Class 5 CISPR 25 testing.
（4）Synchronized EMC & dynamometer measurement
Time aligned power operating data and EMI acquisition, supporting root cause analysis of noise under specific working points.
（5）Turn key & cost effective domestic solution
Self developed control system and mechanical components. Shorter lead time, competitive investment and local after sales service versus imported alternatives.
（6）Full standard compliance
Supports CISPR 25, GB/T 18655, ISO 11452, ECE R10 for conducted & radiated emission, immunity tests of passenger/commercial vehicle e axles.
Trated(N.m) | Prated(kW) | nrated(rpm) | nmax(rpm) | Pmax(kW)@ nmax |
1200N.m | 100 | 795 | 2000 | 100 |
Test benches test e-axes of the electric vehicles (EVs).
Main test contents:
（1）Conducted Emission test
（2）Radiated Emission test
（3）Standard: GB/T 18655 & CISPR25
Basic configurations:
Dynamometer & Mechanical System: There are two dynamometer units, each unit can be move in or out the anechoic chamber. The tested e-axes is mounted on the plate, and connect to the dynamometer units by CV shaft.
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.
100kW 2000rpm 1200N.m EMC Test bench for E-drive
Q 1: What are the core differences between this free-standing e-axle EMC test bench and traditional wall-penetrating & fixed test benches?
A1: The core advantages are no civil engineering modification, flexible mobility and higher test accuracy. Adopting a free-standing integrated structure, the equipment requires no chamber wall penetration or embedded foundation, and will not damage the shielding performance of the anechoic chamber. The whole unit can be moved freely in and out of the chamber, greatly improving chamber utilization. Meanwhile, it supports independent dual-axis four-quadrant loading to truly simulate dynamic vehicle conditions such as turning, differential speed and regenerative braking, completely solving the industry pain points of traditional equipment including distorted test data, excessive interference and fixed-site limitations.
Q2: Can this test bench meet the EMC compliance test requirements of mainstream new energy vehicles? Are the test data authoritative?
A2: This product fully complies with mainstream domestic and foreign test standards, including CISPR 25, GB/T 18655, ISO 11452 and ECE R10, covering conducted emission, radiated emission and immunity tests for integrated e-axles of passenger and commercial vehicles. Equipped with an integrated low-EMI-leakage design and self-developed shielded drive shafts, it isolates external interference and maintains a low background noise environment of the chamber. It realizes precise time synchronization of EMC data and dynamometer working condition data, with reproducible and traceable test results, fully meeting the requirements of OEM R&D tests and CMA/CNAS accredited compliance tests for third-party laboratories.
Q3: Compared with imported similar equipment, what are the core advantages of this domestic test bench?
A3: While achieving performance comparable to imported equipment, this product has three core advantages: high cost performance, short delivery cycle and rapid localized after-sales service. The core control system, mechanical shielding assembly and dedicated EMC drive shafts are independently developed and manufactured, fully compatible with the test scenarios of domestic 800V high-voltage platform e-axles and capable of replacing imported products. Compared with imported equipment, it has lower procurement cost and shorter delivery cycle. It provides one-on-one localized technical support, on-site commissioning and operation & maintenance services, with no overseas spare part supply barriers, effectively reducing customers' later operation costs and equipment downtime risks.
