The Main Performance Characteristics of Motors

The main performance characteristics of motors

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Types of motors

The main performance characteristics of motors

DC motor

Shunt dynamo, Separate excitation

Mechanical properties-hard,starting torque-strong,performance of speed adjustment-good

Series excitation

Mechanical properties-soft,starting torque-strong, speed adjustment-convenient

Compound excitation

Mechanical properties-moderate,starting torque-strong, speed adjustment-convenient

Three phase asynchronous motor

The common squirrel cage

Mechanical properties-moderate,starting torque-not too strong, speed-can be regulated

High starting torque

Starting torque-strong

Multi-speed

Multi（2-4）speed

Wound rotor

Starting current-small , starting torque-strong, performance of speed adjustment-good,speed-can be regulated in many ways

Three phase synchronous motor

Speed-cannot be changed by the load, power factor-adjustable

Single phase asynchronous motor

Power-small, mechanical properties-hard