What is a regen motor?
What is a regen motor?
As soon as the motor overcomes the battery it inverts the current direction and starts feeding current into the battery, while developing a counter torque that acts as a brake. This phase is called regeneration (recharging of the battery).
What is IC in motor nameplate?
Electric motors are designed for different types of cooling. Normally the cooling method is stated in accordance with international standard IEC Publication 34-6. Figure 5 shows the designations of this standard and IC stands for International Cooling.
What is the most common cause of motor failure HVAC?
Winding insulation breakdown and bearing wear are the two most common causes of motor failure, but those conditions arise for many different reasons.
What are the cooling method of motor?
In general, water-cooled motors can be divided by two types of cooling – jacket cooling and cooling by heat exchanger (air/water). When using a heat exchanger the airflow is either arranged by a fan on the motor shaft or by an independent motor.
What causes motor regeneration?
An issue arises when an application has regenerative energy present. Regenerative energy is present when a motor is braking or overhauling due to the load. This causes the motor to act as a generator with the energy flowing back into the VFD.
How does motor regeneration work?
Regenerative braking recovers some of the kinetic energy that would otherwise turn into heat and instead converts it into electricity. In this system, the motor drives the wheels during acceleration or cruising, but the wheels drive the motor while decelerating.
What is IP55 in motor?
Standard industrial motors having a rating of IP55, normally considered ‘weatherproof’, are suitable for dry areas. The term ‘IP55’ is worth explaining. In simplified terms, the first number ‘5’ means ‘protection against dust’, and the second number ‘5’ means ‘protection against water’.
Can you fix a burnt out motor?
If an electric motor operates at too high a voltage, excess current flowing through the windings can cause them to become hot and burn out. While it is normally not practical to repair small, direct current (DC) motors that have burned out, other motors can be repaired by rewinding.
What causes an AC motor to go bad?
The most common cause of motor failure, and arguably the most difficult to overcome, is low resistance. Low resistance is caused by the degradation of the insulation of the windings due to conditions such as overheating, corrosion, or physical damage.
How cooling is achieved in motor enclosure?
The totally enclosed unit cooled (TEUC) type of enclosure uses an air-toair heat exchanger and receives its cooling through an external blower. The blower draws air into the heat exchanger through the air inlet. An internal blower circulates the internal cooled air throughout the inside of the motor.
What is IC 411 cooling?
1. Cooling systems. Standard construction electric motors are closed and self-ventilated with a fan mounted to the motor shaft which operates in both directions of rotation. This cooling system, per IEC 60034-6, is designated IC411.
What is cooling and ventilation of electric motors (IC)?
Home / Technical Articles / Cooling and Ventilation of Electric Motors (IC) The surface cooling using flat ribs combined with a defined inner cooling circuit with shaft-mounted fan inside the motor ensure optimum motor utilization. All rotating electrical machines generate heat as a result of the electrical and mechanical losses inside the machine.
What is the best cooling method for motors?
Air-air cooling is a common cooling method for motors. There are usually three ways of IC611.IC616 IC666. Because the rotation of the rotor drives the air to blow all parts of the motor, the natural cooling is enough for the motor with small capacity. However, in most motors, internal or external ventilation must be used to enhance cooling.
What is ic611 ic616 ic666 motor?
There are usually three ways of IC611.IC616 IC666. Because the rotation of the rotor drives the air to blow all parts of the motor, the natural cooling is enough for the motor with small capacity. However, in most motors, internal or external ventilation must be used to enhance cooling.
What is the IEC designation system for cooling?
The system used to describe the method of cooling is currently being changed by IEC, but the designation system currently in use is as follows: A prefix comprising the letters IC (index of cooling) A letter designating the cooling medium, this is omitted if only air is used Two numerals which represent: