Single Station Rotor Testing Machine For Aluminum Casting Rotor Broken Bar

Rotor Testing Machine For Broken Bar Of Aluminum Casting Rotor

1. Effect of on motor performance

• Start torque: broken bar leads to the increasing of the rotor resistance; therefore, the start torque is small.
• The low efficiency, high temperature rise and high slip ratio will be caused by the increasing of rotor resistance and consumption.

2. Technical specification

3. Features

3.1 The rotor testing machine is applied to be used at both laboratory and production line.

3.2 Rotor testing range: 50mm＜ rotor iron diameter＜200mm ；50mm＜ rotor iron thickness＜400mm

3.3 Conducting bar test include: short circuit, broken, fullness and comprehensive value and so on.

3.4 The rotor fixture and the movement of sensor are driven by cylinder, which improves the stability of the rotor.

3.5 Automatically display the test result, record the testing data, display the quantity of conducting bar, broken bar and thin bar.

4. The reason of broken bar

4.1 The core of the rotor is pressed too tight to expand after die-casting aluminum, and there is too much tension on the aluminum bar to pull the aluminum bar apart.

4.2 After casting aluminum, the mold is too early to be removed, and the aluminum is not solidified well, then the aluminum bar is broken because of the expansion force on the iron core.

4.3 Before casting aluminum, there are inclusions in the slot of the rotor.

4.4 Slotted holes are forgotten to be punched when punching the silicon steel sheet.

4.5 Porosity is in the aluminum strip, or the slot cleaning is not good, and there are inclusions in the aluminum liquid.

4.6 There was time gap when pouring the aluminum. The poured aluminum water cannot be combined since the aluminum water is easy to be oxidized, and "cold partition" appears.

5. Machine detail picture