The torque of the hydraulic oil pump motor is the power of the motor rotation. The main sources of torque fluctuations are: torque current fluctuations, cogging torque, processing technology and so on. The following editor of Dalan Motor will explain to you the harm of torque fluctuation and how to improve this phenomenon.
1. The harm of torque fluctuation:
(1) Large noise
The harmfulness of noise mainly depends on the frequency, intensity and exposure time of the noise. Noise not only interferes with people's lives and work, it also causes hearing damage, and even induces a variety of cancer-causing and fatal diseases. Electric motors are used in many products in daily life, such as fans, air conditioners, ceiling fans, etc. The fan noise and air conditioner noise will directly affect the quality of sleep.
(2) It is easy to cause system resonance
At the beginning of the 19th century, a group of Napoleon soldiers passed the bridge of Angers, France, under the command of the commander, with a mighty and uniform pace. When approaching the middle of the bridge, the bridge suddenly violently vibrated and eventually broke and collapsed, causing many officers and soldiers and citizens to fall into the water and die. After investigation, the culprit responsible for this tragedy was resonance! Because when the soldiers of the brigade walked together, the frequency generated was exactly the same as the natural frequency of the bridge, which strengthened the vibration of the bridge. When its amplitude reached the maximum until it exceeded the resistance of the bridge, the bridge broke.
Torque periodic fluctuations, if the generated frequency is consistent with the natural frequency of the system, it will cause resonance, especially some products with plastic shells, torque fluctuations are very prone to resonance phenomena, such as fan resonance, air conditioning resonance, etc.
(3) Large electromagnetic interference
One of the sources of torque fluctuations is current fluctuations. The changing current produces a changing magnetic field. The large current fluctuations cause large radiation, so that the conduction and space radiation exceed the standard.
Poor processing accuracy: Torque fluctuations lead to uneven processing, and even lead to fracture and damage of processed parts.
Accelerate system aging: Torque fluctuations cause mechanical components to wear periodically on one side.
2. Improvement of torque fluctuation:
The motor body is improved: the back-EMF waveform is designed as a sine, the motor chute design, and the minimum cogging torque.
Using FOC technology, the torque is always stable, the control accuracy is high, and the current sinusoidal changes, to minimize torque current fluctuations.
----- Responsible Editor: Dalan Oil Pump Motor 02-Procurement Consultant
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