A three phase motor is more efficient than a single phase motor because of the peculiarities of alternating current ac. I m posting low resolution pics here but can email the high resolution.
Motor Wiring Part 2 Ec Amp M
Y yy motor diagram. Brake motor connection single speed dual voltage yyy connection diagram dt79 example motor voltages. The most common numbers are three six nine or twelve. Note that these numbers are all multiples of three since their combinations must accommodate three incoming phases. Using the above mentioned induction motor with the stator windings in delta one can. Ac 3 phases bax only δy6w δy 6w diagram. I see it on a 3 phase siemens nord gear motor i just got.
This is achieved by altering the wiring connections inside the motorthe motor may have fixed or variable torque depending on the stator windingit is named after its inventor robert dahlander 1870. Like other motors there is a wiring diagram for lv and hv however the terminals are not marked. These lead combinations are designed to accommodate single or dual voltages and wye delta or wyedelta winding. 200 346y volts 60 hz 330 575y volts 60 hz 220 380y volts 50 hz 1 motor wired for. You have probably noticed that three phase motors can have a varying number of leads exiting the junction box. A dahlander motor also known as a pole changing motor dual or two speed motor is a type of multispeed induction motor in which the speed of the motor is varied by altering the number of poles.
230yy460y volts 60 hz 200yy400y volts 50 hz brake motor connection single speed dual voltage y connection diagram dt13 examples motor voltages. When a motors power supply is brought in from three wires instead of just one with the power delivery cycling through each of these in sequence hence the a part of ac it permits an effective power level that is 3 times higher about 1728 times higher than a. I have dealt with lvhv motors before but never seen this yy and y. 3 lead y 3 lead delta 6 lead y 6 lead delta 9 lead high voltage y 9 lead low voltage y 9 lead high voltage delta 9 lead low voltage delta 12 lead high voltage y 12. Motor is in the connection yy u un then for the same motor in the connection u 0866un the corresponding total losses dependence pγpuand efficiency dependence ηpu may be given by curves 5 in fig.
Gallery of Y Yy Motor Diagram
