The Hysteresis Dynamometer

Testing Principle

1. Hysteresis dynamometers employ electromagnetic induction to generate braking torque.
2. The torque produced is independent of the shaft speed, which facilitates precise load control.
3. The braking system comprises a pole structure and a steel rotor.
4. The magnetic flux present in the air gap generates a frictionless braking force.
5. Torque can be adjusted by regulating the excitation current.

Testing Content

1. Torque Testing: This procedure measures real-time torque output with high precision.
2. Speed Testing: This evaluation assesses motor performance across various speeds.
3. Power Testing: This process calculates both input and output power for the purpose of efficiency analysis.
4. Efficiency Testing: This testing determines the rates of energy conversion efficiency.
5. Temperature Rise Testing: This monitoring assesses heat generation under load conditions.
6. Vibration Testing: This assessment evaluates the mechanical stability during operation.
7. Noise Testing: This measurement quantifies sound levels during motor operation.
8. Load Characteristics Testing: This analysis examines performance under varying load conditions.
9. Cogging Torque Testing: This evaluation measures torque ripple and operational smoothness.
10. Overload Capacity Testing: This test assesses performance beyond the rated load limits.
11. Starting Performance Testing: This measurement evaluates the motor’s startup characteristics.
12. Transient Response Testing: This evaluation examines the system’s response to sudden changes in load.
13. Harmonic Analysis: This analysis detects distortions in voltage and current during operation.

Advantages

1. This system provides precise measurement of torque that is independent of speed.
2. The frictionless operation contributes to reduced wear and lower maintenance costs.
3. This technology supports testing under conditions ranging from free-run to locked rotor.
4. High accuracy (±0.2%-0.5% full scale) is assured, ensuring reliable results.
5. A variety of cooling options (convection, air, blower) are available to facilitate extended testing periods.

Applications

• Motors:
  
  • Combustion engine (automotive, motorcycle, chainsaw, ETC。)
  • Hybrid
  • Electric
  • Hydraulic (Aerospace, machinery)
• Pumps (hydraulic, oil)
• Propeller (Aerospace, marine, helicopter)
• Automobile industry, torque measurement on labor and/or production (Formula 1, screen wiper, electrical windows, starter, generator, brake)
• Reduction gear, 变速箱
• Clutch, overload clutch
• Motorized valve drill, pneumatic tools
• Other machine tools