Synchronization motor and its speed adjustment of DC armature three-phase AC excitation

Abstract

The invention is concerned with the three phase direct armature altermating current exciting synchronous machine and its timing, belongs to the electric machine manufacturing and the power electronic technology technique field. The three phase altermating current group 1 is designed as the excitation winding with its power taking the smaller part of the machine capacity, which locating in the circle groove of the stator core 2, and the current winding 3 is designed as the armature winding with its power taking large part of the machine capacity, which locating within the rotor core ex-circle groove 4 in distributed winding state. The invention uses the simply large power current variable voltage control device instead of the more expensive or complicated one, especially, the high current transducer to achieve the timing of the synchronous machine.

Description

technical field [0001] The invention relates to a novel synchronous motor and its speed regulation, in particular to a DC motor with an excitation magnetic field rotating, belonging to the technical fields of motor manufacturing and power electronics. Background technique [0002] Now the traditional synchronous motor, the excitation winding is a DC winding, which is connected to a DC power, and its power is relatively small, generally accounting for about 20% of the output power of the motor. It generally accounts for about 80% of the output power of the motor. [0003] Most of the electric energy required by the synchronous motor can be directly supplied to the armature winding of the motor in the form of three-phase alternating current without conversion, while the DC electric energy converted from alternating current required by the field winding only accounts for a small part of the output power of the motor. It is reasonable for occasions that do not require speed reg...

AI Technical Summary

Problems solved by technology

[0004] But it is unreasonable for synchronous motors that require speed regulation. Now the speed regulation of synchronous motors mainly depends on power electronic devices to convert the three-phase AC power supplied to the motor, such as frequency conversion and variable voltage speed regulators. These speed regulators are very expensive. , no matter the low-voltage or high-voltage ones are more expensive than the motor itself, even several times, resulting in a high overall price of the synchronous motor and speed control system, and complicated technology

[0005] In contrast, the DC voltage regulation and speed regulation system is much simpler and cheaper, but it is not applicable to ordinary synchronous motors

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