advantage of forward and reverse motor starting

Such construction is called a squirrel cage rotor. Two end side of these bars are permanently short-circuited with the help of end rings. The rotors are made up of aluminum or copper bars. Hence the 0th slot winding and 9th slot winding will be the same coil. Here, the number 9 is called the pole pitch. Pole pitch is nothing but a difference between 0 th winding to the next winding of the same coil.įor example: Now you are winding a motor at 0th slot after completion of the 0 th slot, the one end of the winding lead goes to the 9th slot. While winding the motor, we need to calculate pole pitch of the motor. It always lesser than the synchronous speed. Remember that, motor speed never catches the synchronous speed.

It picks the synchronous speed of the motor. Learn More: Motor Power Calculation Calculator & DC, 1 Phase & 3 Phase Power Fromula Synchronous speed The motor pole is directly proportional to the speed of the motor. In the construction part, the motor poles are playing a major role

The coils are wound in the motor to form a certain number of poles. The coils are insulated in order to avoid the physical contact between the motor and the earth.Īlso, there are 4 types are there such as Class A, B, F and H and they are having different temperature ranges such as 105 deg, 130 deg, 155 deg, and 180 deg. In the winding part, aluminum or copper coils are used to wound the motor, but efficiency concerns mostly copper coils are preferred. The stampings are slotted in the motor to carry the main winding of the motor (coil). The stator is made up of silicon stamping since the silicon has a property of reducing the hysteresis losses of the motor Also, all stampings are in laminated format for reducing the iron loss (constant losses). Learn More: Switched Reluctance Motor (SRM) Construction, Working, Types, Advantages Single-phase induction Motor Stator

Advantage of forward and reverse motor starting