käivitusmoment

Käivitusmoment, often translated as starting torque or breakaway torque, refers to the initial rotational force required to set an object in motion from rest. In mechanical systems, it is the peak torque a motor or engine produces at the moment it begins to turn. This initial force must overcome static friction, inertia, and any other resistances that hold the object stationary.

The magnitude of käivitusmoment is crucial for applications where a load needs to be started from a standstill. For example, electric motors need sufficient käivitusmoment to overcome the inertia of the rotor and any connected machinery, as well as the frictional forces within the motor and the load. Similarly, internal combustion engines must generate enough torque to rotate the crankshaft and initiate the combustion cycle.

Factors influencing käivitusmoment include the design of the motor or engine, the type of lubrication present, and the operating temperature. A higher käivitusmoment generally indicates a greater ability to start under load. In contrast to running torque, which is the torque produced during continuous operation, käivitusmoment is a transient value specifically associated with the initiation of movement. Understanding and managing käivitusmoment is essential for proper system design and operation, ensuring that a device can reliably start and perform its intended function.