Question
Download Solution PDFOverheating of DC motors is mainly due to:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThere are typically five main reasons for overheating are given below
- Overload
- Poor power condition
- High effective service factor
- Frequent stops and starts
- Environmental reasons
- Over Heating in motors can cause a number of performance problems.
- Overheating causes the motor winding insulation to deteriorate quickly.
- For every ten centigrade rise in temperature, the insulation life is cut in half. It has been concluded that more than 55% of the insulating failures are caused by over-heating.
- Every electric motor has a design temperature. If a motor is started off at a bad current value, it starts operating in a much warmer condition than the design temperature.
- It is very important that the motors should be matched with their ideal current values.
- Overheating also occurs when an electric motor is forced to operate in a high temperature environment. This causes the rate at which heat can be conducted to reduce at an alarming rate.
- The area where electric motors are operating must have a proper cooling system and a ventilation system should be there in case the cooling system stops working.
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