BLDC motor test dynamometer
BLDC motor test dynamometers (dynos) are specialized systems used to measure torque, speed, power output, and efficiency by applying a controlled load. They are essential for analyzing motor performance in electric vehicles, robotics, and industrial automation, usually featuring eddy-current or powder brakes, torque sensors, speed encoders, and automated data acquisition software.
Key Components and Features
- Load Type:Â Eddy-current brakes are common for high-speed, while powder brakes are preferred for high-torque applications.
- Measurement Sensors:Â Include reaction torque transducers, optical encoders for RPM, and temperature sensors (Pt100) to monitor winding and bearing heat.
- Data Acquisition & Control:Â Often use PC-based systems (e.g., LabView) to capture data, calculate efficiency, and control load, enabling automatic or manual testing.
- Power Ranges:Â Systems can range from small fractional HP motors up to 1000 kW and 5000 Nm for large industrial or EV applications
Common Test Types
- Performance Curves:Â Mapping torque, speed, and efficiency under various loads.
- Efficiency Analysis:Â Measuring input electrical power vs. output mechanical power.
- Thermal Testing:Â Monitoring temperature rise during continuous, high-load operation.
DIY and Specialized Solutions
- Eddy Current Brake:Â A DIY-friendly approach involving a copper/aluminum disc and adjustable magnets to generate variable load.
- Electronic Load:Â Using 3-phase rectifiers and power MOSFETs to create a load for smaller BLDC motors.
- Test Bench:Â Application Systems offers specialized test beds for hub motors.
Typical Data Captured
- Voltage and Current (Input)
- Torque and RPM (Output)
- Mechanical Power & Efficiency
- Temperature (Controller/Motor)
Roltamax Engineering Pvt. Ltd. is an electronics company based in Navi Mumbai, India, that manufactures dynamometers and other precision testing and measuring equipment. The company was incorporated on February 28, 2019. Dynamometers: Used for testing motors, chassis, engines, transmissions, drones, EVs, wind turbines, and brakes. Load cells and sensors: This includes load cells, torque transducers, pressure sensors, and other force and tension measurement devices & Radar level sensors. Weighing systems:
B-306 Silver Sprig MIDC Taloja Navi Mumbai-410210
info@roltamax.com
+918080809588
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