Customized coffee machine need to pay attention to the original star connection of the motor can not be connected to the triangle, if connected to the triangle, then the phase voltage rises to about 1.73 times, long time operation will inevitably burn the motor. 4. Similarly, the motor with triangular connection can not be connected into star shape. If it is connected into star shape, the phase voltage will be reduced to about 1.73 times, which can not reach the normal power. 5. In China, generally smaller motors below 3-4kW are required to be connected to star, and larger motors above are required to be connected to triangle. 6. Why are high power motors connected to the triangle, the advantage is light load start, in order to facilitate the buck start (start into a star, run into a triangle, motor start time is very short into a star.
The advantage is that the starting current can be reduced to 1/3, etc. Star connection phase current is equal to line current, line voltage is the square root of phase voltage 3 times, triangle connection, line voltage is equal to phase voltage, line current is the square root of phase current 3 times, for three-phase symmetric load connected into some connection can improve the working voltage of each phase, improve the power. An induction motor is a kind of important parameters of the motor, it is directly related to the performance of the motor, coffee in mechanical and electrical machine motor trial slip measurement directly affects the accuracy of test results, the measurement of slip method including digital slip, induction coil method, speed measurement instrument, digital frequency meter, frequency flash meter test method, etc. A digital slip measuring instrument to measure the slip of the motor in the rotating shaft to place a photoelectric reflection mark or induction device when the motor rotates without obvious load.
