käynnistysväännön

Käynnistysvääntö refers to the torque required to start an electric motor from a standstill. This torque is crucial for overcoming the initial inertia of the rotor and any frictional forces present in the system. For many motor applications, particularly those involving heavy loads or the need for rapid acceleration, a sufficient starting torque is essential.

The magnitude of käynnistysvääntö is influenced by several factors related to the motor's design and operating conditions. These include the motor's construction, the type of winding used, the voltage applied, and the frequency of the AC power supply if it's an AC motor. For direct current (DC) motors, the starting torque is primarily proportional to the armature current and the magnetic flux.

Different types of electric motors exhibit varying characteristics of starting torque. For instance, series-wound DC motors are known for their very high starting torque, making them suitable for traction applications like electric vehicles or cranes. Induction motors, commonly used in industrial settings, have a starting torque that depends on their rotor design and the slip. Some motors are designed with specific starting mechanisms or external components, such as soft starters or variable frequency drives (VFDs), to control and optimize the starting torque, thereby reducing mechanical stress and electrical surges. Understanding and managing käynnistysvääntö is a key aspect of motor selection and control.