Dongguan Langyi Electromechanical Technology Co., Ltd.

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Influence of working mode and current type on motor structure

【Guide】Synchronous steam turbine generator (hidden pole motor) with excitation winding embedded in slots distributed along the circumference of the rotor. It is almost all 2 poles, there are also special 4 poles, as well as individual hydro generators or multi-pole variable pole motors with very high flying speed.



At a technical exchange meeting with foreign businessmen, a female colleague of the same surname who participated in the docking at the same time. When the translator introduced the staff, the foreign businessmen felt some surprises that were not understood. It seems to have given it a reasonable explanation by way of classification. Indeed, for the same thing, there will always be some differences in results or feelings from different angles of analysis, induction, and understanding. Recently, Ms. referred to an English version of the motor book. From the perspective of logical induction, there are still some differences from the expression and description of our local version. Today, we talk about the structural design of motors from the perspective of motor performance. There are many factors that affect the structure of the motor. Today we will talk about the structure of the motor from the working mode of the motor and the type of current.



How the motor structure works


●Generator (current generating device)-is a machine that converts mechanical energy into electrical energy.


●The motor is a machine that converts electrical energy into mechanical energy.


There is no difference in structure between the generator and the motor. However, some are only used as generators, while others are only used as motors.


●Converter is a single machine or unit that converts electrical energy into other types of current, voltage, frequency or number of phases. (1) The single-armed inverter is a converter, and its conversion is performed in an armature. (2) The motor-generator set is also a converter, which is often composed of one or more directly connected motors and generators. Only mechanical conversion of energy is performed between the motor and the generator.


●Reactive generators or tuning cameras (also known as phase compensators) are machines that do not perform energy conversion, but regulate the apparent power and stabilize the grid voltage through the output or input of reactive power. Its structure and mechanical design are completely different from other synchronous motors.



Types of current affecting motor structure


●DC motor. A generator that generates DC current or a motor that rotates with DC current.


(1) The commutator motor is the general structure of the DC motor, that is, the current conversion is a DC motor that is completed on the commutator (current converter, commutator).


(2) A unipolar (same polarity) motor is a motor whose magnetic field lines do not change direction in the rotor, so the direct current in the armature bar does not cause current commutation, and the current is drawn from the rotor surface through the slip ring.


● AC motor (multi-phase or single-phase AC motor of any frequency). A generator that generates alternating current or a motor that rotates with alternating current.


● Synchronous motor. Divided into saliency synchronous motor (salient pole motor) (hereinafter referred to as salient pole motor). Usually the armature (stator or stator) is stationary, while the poles and field windings rotate together; only small low-voltage synchronous motors sometimes the armature is rotating and outputs or inputs current through the slip ring. This type of motor is also important for rotating rectifier synchronous motors.



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