Things to Consider When Buying an Industrial BLDC Motor
 China vacuum cleaner motor BLDC motor uses semiconductor switching devices to realize electronic commutation, that is, electronic switching devices are used to replace traditional contact commutators and brushes. It has the advantages of high reliability, no commutation sparks, and low mechanical noise, and is widely used in high-end audio recorders, video recorders, electronic instruments, automated office equipment, etc.

The BLDC motor consists of a permanent magnet rotor, a multi-pole winding stator, and a position sensor. According to the change of the rotor position, the position sensor commutates the current of the stator winding in a certain order (that is, detects the displacement of the rotor magnetic pole relative to the stator winding, and generates a position induction signal at the determined position. After the signal conversion circuit is processed, the power switch is controlled. circuit, switching the winding current according to a certain logical relationship). The work of the stator windings.

What aspects should I start from when buying a brushless DC motor? What should be paid attention to? The following Ye Hao vacuum cleaner motor manufacturers will introduce one or two to you. When choosing a DC BLDC motor, you may wish to compare it to see if it is useful.

1. Pay attention to the voltage of the BLDC motor

The voltage is supplied by an electronic switching circuit controlled by the output of the position sensor. When choosing a brushless DC motor product, the correct voltage should be selected first, and the voltage parameters of the driver should be selected by selecting the rated voltage according to the needs of the customer.​​​ Note that the voltage used during no load and full load cannot exceed the range specified by the driver.

2. Pay attention to the current of the BLDC motor

Let's choose the peak current of the driver. The method of selecting the peak current is the rated input current Ir(A) of the motor, then the peak current Ip(A)=2xIr, otherwise the output current of the driver will not have a certain engineering margin during use. Motor's rated output power (or maximum output power) Pr (W) and drive voltage Vr (V), peak current Ip (A) ≧ 4xPr/Vr.

3. Pay attention to the operating temperature of the BLDC motor

We can also set the motor according to the parameters, but we need to set the appropriate parameters according to different motors. Of course, we also need to consider the operating temperature range. The higher the temperature, the higher the price.

4. Pay attention to the resistance of the BLDC motor

According to the power insulation requirements, in order to ensure the normal operation of the driver, the insulation resistance between the motor Hall wire ground wire and the motor winding wire, the Hall ground wire winding wire, and the casing is greater than 100 megohms 500VDC, and can withstand 600VAC/50Hz/1mA/1 Second withstand voltage without breakdown.

Special attention: DC Brushed Motor Suppliers BLDC motor drive braking adopts motor end short-circuit braking. There is a braking force when the motor is running, and there is no braking force when it is not running. The higher the speed, the greater the braking force. Since the braking current does not pass through the current sense resistor, the braking current cannot be controlled. Therefore, when braking, the speed cannot exceed the safe braking speed, otherwise the power tube may be burned. Please use this feature with caution.