Käivitusmomendi

Käivitusmomendi, also known as starting torque or breakaway torque, refers to the maximum torque that an electric motor can produce at zero speed. This torque is crucial for initiating the rotation of a load from a stationary position. It is a key parameter used in motor selection to ensure that a motor can overcome the inertia and resistance of the driven equipment.

The käivitusmomendi is influenced by several factors, including the motor's design, winding configuration, and the applied voltage. Different types of motors have varying käivitusmomendi characteristics. For instance, induction motors typically have a lower käivitusmomendi compared to DC motors or synchronous motors, especially when started directly online. However, special starting methods or motor designs can be employed to increase the käivitusmomendi of induction motors.

Understanding the käivitusmomendi requirement of a specific application is vital. If the motor's käivitusmomendi is insufficient, the motor may fail to start the load, stall, or overheat. Conversely, an excessively high käivitusmomendi might be unnecessary and could lead to increased component stress or energy consumption during startup. Manufacturers provide käivitusmomendi specifications for their motors, often expressed as a percentage of the rated torque. Careful consideration of both the motor's capabilities and the load's demands is essential for proper motor sizing and system performance.