The wiring diagram and method of high efficiency motor are different from those of individual motors, so it is necessary to know something in advance when wiring high efficiency motors. High efficiency motor adopts star connection and triangle connection. Let's take a brief look.
1、 High efficiency motor star connection method: the goal is to reduce the voltage of the phase line of the electric motor. Explosion proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries. In addition, it is also widely used in textile, metallurgy, urban gas, transportation, grain and oil processing, paper making, medicine and other sectors. As the main power equipment, explosion-proof motor is usually used to drive drive machinery such as pumps, fans and compressors. The end of the three windings,10. Y and Z are connected together to form a common point O, and three end lines are led out from the starting end A, B and C, which is called "star connection" or "Y connection". Features: I line=I phase, U line=√ 3 × U phase, P phase=U phase × Phase I, P=3P=√ 3 × U line × Phase I=√ 3 × U line × Line I.
2、 Triangular connection method of permanent magnet synchronous motor: connect each phase power supply or load, lead out each connection point, and connect three-phase power supply. Explosion proof motor is a motor that can be used in flammable and explosive places, and does not produce electric sparks during operation. Explosion proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries. In addition, it is also widely used in textile, metallurgy, urban gas, transportation, grain and oil processing, paper making, medicine and other sectors.
Star connection of permanent magnet motor can reduce speed, reduce winding turns, simplify process and reduce cost. Because it is an efficient motor equipment, it is very easy to malfunction. After star connection, the first end and the end of the three-phase coil of the motor are led out, which is conducive to inspection and measurement. At the same time (if possible), the connection mode can also be changed to reduce the pressure and start.
The star connection method and triangle connection method of high efficiency motor refer to the winding connection method of the motor itself. The star connection method refers to connecting the three-phase ends of the motor winding together, and the three-phase end is the power supply end; Triangular connection means that the head end and tail end of three-phase winding are connected with each other, and the three end points are the power supply end. Explosion proof motor is a motor that can be used in flammable and explosive places, and does not produce electric sparks during operation. Explosion proof motors are mainly used in coal mine, oil and gas, petrochemical industry and chemical industry. In addition, it is also widely used in textile, metallurgy, urban gas, transportation, grain and oil processing, paper making, medicine and other sectors. Due to the small output power, the star connection method of high efficiency motor is commonly used for starting small power, large torque motors or high-power motors, with small machine loss. After abnormal operation, the triangle connection method is used. The phase voltage output by star connection method and triangle connection method of high efficiency motor is divided into 220V and 380V.
