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DC brushless motor constant power speed regulation mode
Apr 15,2021
DC brushless motor constant power speed regulation mode Is the so-called weak magnetic speed regulation, this mode of speed regulation, the essence is a constant torque speed regulation mode of a supplement, mainly is some occasions, the need for a wide range of speed regulation, such as some gantry bed, the need for DC brushless motor processing when feeding is very slow, torque to be very high;A...
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The number of magnetizing poles required for different types of motors
Apr 07,2021
The number of magnetizing poles required for different types of motors First， we talk about the types of magnetization: A.The outer charging of the magnetic ring -- that is, the outer surface of the magnetic ring is filled with magnetic poles, which are generally used for the rotor of the motor; B.The inner filling of the magnetic ring -- that is, the inner surface of the magnetic ring is filled w...
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The requirements of micro DC motors and small brushless DC motors for magnetic materials
Mar 29,2021
The requirements of micro DC motors and small brushless DC motors for magnetic materials Both micro DC motors and small brushless DC motors use magnetic tiles or magnetic rings, but the main difference between them is the different magnetization requirements.In the magnetization waveform, we can judge the magnetization quality mainly by observing several parameters in the waveform: average extreme...
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Current status of brushless DC motor application
Mar 22,2021
Current status of brushless DC motor application Brushless DC motor (BLDCM) is developed on the basis of brushless DC motor, but its drive current is exactly AC;Brushless DC motor can be divided into brushless rate motor and brushless moment motor.In general, brushless motor drive current has two kinds, one is a trapezoidal wave (generally "square wave"), the other is a sine wave.Sometimes th...
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Why does a motor produce axial current?
Mar 08,2021
Why does a motor produce axial current? The current in the circuit of the shaft - bearing - base of the motor is called shaft current. Causes of axial current generation: Magnetic field asymmetry; There are harmonics in the power supply current; Manufacture, installation is not good, due to the rotor eccentricity caused by uneven air gap; There is a gap between the two semicircles of the detachabl...
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The influence of electromagnetism on motor vibration
Mar 01,2021
The influence of electromagnetism on motor vibration There are three main situations for motor vibration: Electromagnetic reasons;Mechanical reasons;Mechanical and electrical mixing. Today, we talk about electromagnetic reasons: 1, power supply: three-phase voltage imbalance, three-phase motor phase lack of operation. 2, stator: stator core ellipse, eccentric, loose;The stator winding has broken l...
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vibration is harmful for brushless DC motor/brushed motor/sychronous motor
Feb 26,2021
Vibration is harmful for brushless DC motor/brushed motor/synchronous motor The vibration of the motor will shorten the life of the winding insulation and bearing, and affect the normal lubrication of the sliding bearing. The vibration force will promote the expansion of the insulation gap, so that the external dust and water will invade it, resulting in the reduction of insulation resistance and ...
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Cause analysis for abnormal starting of brushless DC motor with external force
Jan 28,2021
Cause analysis for abnormal starting of brushless DC motor with external force After the brushless DC motor was applicated for a period of time, customer find that the motor starts abnormal, sometimes must rely on external force to start? There are three main reasons： 1. Hall abnormal, check whether the Hall line 2. Check whether the hall plate is filled with water, because the environment has wat...
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Position feedback for brushless DC motor
Jan 11,2021
Position feedback for brushless DC motor Since the birth of brushless DC motor, Hall effect sensor has been the main force of realizing commutation feedback.Since three-phase control requires only three sensors and has a low unit cost, they are often the most economical choice for reversing from a purely BOM cost perspective. Hall effect sensors embedded in the stator detect the position of the ro...
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Reverse direction of BLDC motor
Jan 06,2021
Reverse direction of BLDC motor Before diving into the BLDC motor feedback options, it's important to understand why you need them. BLDC motors can be configured for single phase, two phase and three phase;The most common configuration is three-phase.The number of phases matches the number of stator windings, while the number of rotor magnetic poles can be any number depending on the application r...
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