How to choose a quality magnetic powder dynamometer?

　　Usually marked onDynamometerThe power marked on the dynamometer refers to the power that the dynamometer can absorb. The selection of the dynamometer must not only meet the three main technical indicators of speed, torque, and power, but also consider whether it meets the specific testing requirements. Generally, the dynamometer motor needs to test parameters such as no-load speed, no-load loss, and stall torque.

　　If used at high speeds for a long time, the lifespan of the dynamometer will be greatly shortened, especially due to mechanical wear. Eddy current dynamometers and asynchronous dynamometers cannot stop the motor or power tools, but their speed limits are very high, usually between 20,000 to 30,000 RPM, and the torque can also be quite large.

　　In addition, consideration is also very important, because general dynamometers measure the output power of AC/DC motors or power tools. When selecting a dynamometer, it is best for all test data of the motor to be between 30%-90% of the dynamometer's performance parameters. Typically, asynchronous dynamometers do not require water cooling, only air cooling.

　　However, eddy current dynamometers, hysteresis dynamometers, and magnetic powder dynamometers require both water cooling and air cooling. Some low-power hysteresis dynamometers can meet testing requirements without water cooling. When using a dynamometer, the cooling function must be turned on, as the testing accuracy of the dynamometer is most guaranteed within this range.

　　Strictly speaking, this indicator of the dynamometer should not be exceeded; otherwise, the measured torque of the dynamometer usually cannot exceed the maximum torque. If all tests are completed in a short time, additionally, the speed of the dynamometer usually cannot exceed the maximum speed, but it can be locked, though the power should not be too high. The torque is generally less than 20 Newton meters.

　　Currently, magnetic powder dynamometers are widely used in the country, but in terms of performance! The technology from magnetic powder and hysteresis! The hysteresis of the comprehensive electrical testing instrument is better than the magnetic powder technology! First of all, in principle, magnetic powder is filled with magnetic powder, and after electrification, the magnetic powder hardens (the degree of hardening depends on the strength of the electromagnetic field), and then it rubs against the rotating shaft to generate torque. Hysteresis is a special metal rotor containing rare earth materials, which moves in the electromagnetic field inside the brake after electrification, thus generating torque! It belongs to the non-friction type!