What is the impact of the number of poles on the motor?

What is the impact of the number of poles on the motor?

The motor currently has 2/4/6/8 class motors and the number of motors for special applications may be higher. The more pole pairs of the motor, the lower the speed of the motor, but the greater the torque. When choosing a motor, you should consider how much the starting torque needs to be loaded, such as loading with a load than with no load. The starting torque needs to be large. If it is a high-power and large-load starting, it is also necessary to consider the step-down start (or the star-delta start). As for the problem of matching the speed of the load after determining the number of poles of the motor, you can consider different Diameter pulleys are used for transmission or with gears (gearboxes) for matching.

If the power requirement of the load cannot be reached after passing the belt or gear transmission after determining the number of poles of the motor, then the power consumption of the motor should be considered.

How do you know that the motor is a star/delta connection?

The star connection method is that one end of the three-phase winding is connected, and the other end is connected to a three-phase power supply, and the shape is like the letter "Y"; the triangle connection method is that the three-phase windings are connected end to end to form a "△" shape, and the top end of the triangle is connected to the three-phase. power supply.

Their phase voltages are different. Generally, the rated voltage of the star-connected motor is 220V, and the rated voltage of the delta connection is 380V. The connection method is generally indicated on the inside and outside of the cover of the junction box, and different connections correspond to different power supply voltages.