Brushless generator rotor

Brushless generator rotor

Brushless Excitation System of Turbo Generator

The brushless excitation system works in the absence of commutator, slip rings and brushes. Instead of these components we are using Permanent Magnet Exciter and three phase main Exciter with silicon diode rectifier the system has generated. With this system we can avoid dust particles which cause a great maintenance cost. The complete structure of this excitation system is explained clearly in this review. Drawback of this system is presence of considerable exciter time constant which affects the rate of change of voltage.


**The primary difference between brushless and brush generators lies in their method for transferring DC power from the exciting current to the generator’s magnetic fields.** Generators produce current by moving an exciter, or mobile electromagnet, against the field generated by a stator, or stationary, electromagnet. This distorts the field and generates an electric current.

Brushless generator rotor


Conventional brushless alternators, such as shown in U.S. Pat. No. 3,676,764, utilize a portion of the generated output current to produce a magnetic field in the alternator. This current is rectified and fed through an excitation coil on the alternator stator. Typically, such coupling includes a potentiometer for varying the voltage across the excitation coil to adjust the field of the alternator and, thereby, the output voltage. If the excitation voltage fluctuates a voltage regulator may be added in the excitation circuit.

Brushless generator rotor

About this product

This invention relates generally to brushless generator systems and more particularly to a brushless generator system combining a permanent magnet separator with the system exciter, with the permanent magnet generator and exciter functioning independently of each other to provide output voltage self build-up characteristics without increasing the size of the machine.

Equivalent circuit and characteristic simulation of a brushless electrically excited synchronous wind power generator

Unlike the stator, where virtually all of the windings are buried under many layers of mica and epoxy insulation, the rotor windings are open to the environment, and have minimal insulation.  For this reason, rotors are particularly vulnerable to ground faults and inter-turn shorts (“shorted turns”).

Feasibility for Utilizing IEEE 802.15.4 Compliant Radios Inside Rotating Electrical Machines for Wireless Condition Monitoring Applications

Rotating equipment is so common, yet so misunderstood, that even highly experienced electricians and engineers are often plagued with questions about their operation. This article will answer seven of the most commonly asked questions. The explanations are brief and practical due to space limitations; however, they will enable you to have a better understanding of this equipment.

Fuji GTLR Brushless Exciter – Will it Survive?

The test, inspect and rewind effort included verifying diode leakage  current, the forward and reverse resistance of the diodes, capacitance of the capacitors and the diode wheel insulation resistance.  The mounting hub and rotating components were dye-penetrant tested to verify acceptability for re-use as well as the Parallel ring assembly which was re-silver plated.  The rotor core was loop tested to verify no interlamination shorts existed and following rewind and re-banding with stainless steel, the assembly was rebalanced.

Customer reviews

Silicon Steel Sheet Stamping Part, Motor Stator, Core Lamination manufacturer – supplier in China, offering Brushless DC Motor Stator Rotor Motor Pump Generator Rotor and Stator, Servo Motor Stator, Customized Silicone Steel Sheet Size, OEM Services Are Provided, Brushless Motor Stator, Customized Silicone Steel Sheet Size of 5-100mm, OEM Services Are Provided and so on.