CN2666022Y

CN2666022Y - Brushless excitation generator

Info

Publication number: CN2666022Y
Application number: CN 03237461
Authority: CN
Inventors: 谢邦万
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-09-22
Filing date: 2003-09-22
Publication date: 2004-12-22
Anticipated expiration: 2013-09-22

Abstract

The utility model discloses a brushless excitation motor, comprising a three phase electrical energy generating coil arranged on the rotor of the motor, a magnet field coil arranged on the rotor, a constant voltage output transformer and a rectifier thereof. The utility model is characterized in that the utility model further comprises a motor rotor without excitation brush and copper ring, and a rotor excitation motor without brush and copper ring, and the rotor and the motor sharing a same shaft. The stator of the rotor excitation motor is provided with a permanent magnetic field and a coil excitation magnetic field, and the rotor is provided with the three phase excitation coil and the rectifier; wherein the output of the rectifier is connected with the magnetic field of the motor rotor. The motor with the structure avoids the disadvantage factors caused by the original excitation that goes through the copper ring and the brush, decreases the losses and frequent repairing and enhance the working quality. The volume and material of the constant voltage output transformer and the rectifier thereof can be reduced by five times, thus greatly decreasing the volume and saving the cost, and facilitating the use, installation and maintenance, which is applied to all types of excitation motor.

Description

Brushless excitation generator

Technical field

The utility model relates to a kind of generator, especially the generator by brush and copper ring excitation.

Background technology

Present generator generally all provides exciting current by copper ring and brush to being located at epitrochanterian field coil, the generator operating time has been grown, brush and copper ring all can wear and tear, cause be in contact with one another bad, tend to occur arcing, burn out brush and copper ring, even generator windings, influence is produced and life.

Summary of the invention

The purpose of this utility model provides a kind of brushless excitation generator, and it should be able to overcome the weak point of above-mentioned motor, reduces the generation point of generator excitation fault, improves work quality.

The utility model comprises that the three-phase electric energy that is located on the generator unit stator produces coil, is located at epitrochanterian field coil, constant voltage output transformer and rectifier thereof, is characterized in that also comprising:

With the brushless of described generator coaxle and the rotor-exciting generator of no copper ring.

The stator of described rotor-exciting generator is provided with permanent-magnetic field and coil stimulating magnetic field; Rotor is provided with three phase excitation coil and rectifier; Wherein, the field coil on the output sending and receiving rotor of rectifier.

The generator brushless copper ring of said structure, adopt a coaxial rotor-exciting generator to provide exciting current for its field coil, avoided former exciting current to supply with the unfavorable factor that field coil caused, reduced loss and frequent maintenance, improved work quality by copper ring and brush.Thereby achieve the goal, on this basis, the capacity of constant voltage output transformer and rectifier thereof and material can reduce and reduce more than five times, and volume can significantly reduce, and provides cost savings.Help using and installation and maintenance.

Description of drawings

Shown in Figure 1, be the theory structure schematic diagram of existing excitation generator.

Shown in Figure 2, be theory structure schematic diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Existing excitation generator P by Fig. 1 ₀As can be known, chain-dotted line is represented the conducting magnet core H of generator and transformer E in the theory structure schematic diagram ₀, after rotor rotation, magnetic coil A ₁, B ₁And C ₁Produce exciting current, after the rectifier F rectification that six rectifier diodes constitute, by corresponding brush I and J and copper ring G and K, the exciting current supply is located at epitrochanterian field coil D, produce rotating magnetic field, by iron core H, the cutting electric energy produces loop A ₀, B ₀, C ₀, when rotor reaches rated speed, make it to produce rated power.This electric energy is by the primary coil output electric energy of constant voltage transformer E.The electric current that the secondary coil of transformer E induces draws the adjustment electric current through the rectifier M that six rectifier diodes constitute, and is defeated by field coil D, adjusts magnetic field, constitutes the automatic constant-pressure control circuit, and three-phase electric energy A, B, C output are stablized.General exciting current is corresponding bigger, and the electric current of promptly flow through brush I, J and copper ring G, K is bigger, adds running up of upper rotor part, and the contact surface abrasion of copper ring and brush is very fast, causes loose contact, and is very unfavorable to generator.

In the theory structure schematic diagram of the present utility model of Fig. 2, as can be known,, removed generator P in the left side of dotted line Q ₀Epitrochanterian copper ring G, K and brush I, J; Generator P ₀Stator coil A ₀, B ₀And C ₀And field coil D is constant; Constant voltage becomes device E ₁And rectifier M ₁Theory structure and Fig. 1 in generator P ₀Transformer E and rectifier M thereof compare theory structure and not become, but its capacity, smaller volume.Through application in practice and calculating, its capacity has reduced more than five times, is 25KVA as the capacity of depressor E, and the diode of its rectifier F is with 50A's.After the improvement, constant voltage transformer E ₁Capacity be 5KVA, rectifier F ₁Diode only use 10A's.In Fig. 2, the right side of dotted line Q is to improve the rotor-exciting generator P that the back adds ₁, its rotor has also been removed exciting brush and copper ring, and with generator P ₀Rotor coaxial, this rotor is provided with three magnet exciting coil A ₂, B ₂And C ₂, with generator P ₀Former magnet exciting coil A ₁, B ₁And C ₁Corresponding, magnetic field and stator are synchronous, also are provided with field rectifier F ₁This rectifier F ₁With magnet exciting coil A ₂, B ₂And C ₂The electric current of producing is defeated by field coil D after rectification.At rotor-exciting generator P ₁Stator be provided with a pair of permanent magnet poles S ₀And N ₀, and a pair of coil magnetic field magnetic pole S ₁And N ₁Coil magnetic field magnetic pole S ₁And N ₁Two exits and constant voltage transformer E ₁Rectifier M ₁Output connects.

The operation principle of this brushless excitation generator is:

Rotor-exciting generator P ₁Rotor and generator P ₀Rotor coaxial.As generator P ₀Rotor when drive being rotated by external force, generator P ₁Rotor rotate thereupon, at this epitrochanterian three-phase coil A ₂, B ₂And C ₂With the permanent magnetic field S that is located on the stator ₀And N ₀Produce cutting, generate electric current, through rectifier F ₁Be defeated by field coil D after the rectification.Coil D produces magnetic field, through iron core H again with stator coil A ₀, B ₀And C ₀Produce cutting, produce A ₀B ₀C ₀Three electrode current voltages become device E by constant voltage ₁Output, the power consumption of load is big more, at transformer E ₁The electric current that goes out of secondary induction big more, through rectifier M ₁And coil magnetic field S ₁And N ₁Electric current just big, otherwise, as the same, play the effect of regulating excitation.Adjust they and loop A with an iron core between these two pairs of magnetic poles ₂B ₂C ₂Cutting magnetic force strong, a little less than, make voltage, the frequency of output meet the requirements.Thereby constituted automatic constant-pressure output.

Rotor-exciting generator P ₁Capacity generally be generator P ₀6～10%, by contrast, cost is lower.If generator P ₀Power below 3KW, advance, also can save the transformer E among Fig. 2 ₁With rectifier M ₁, with coil magnetic field S ₁And N ₁Change permanent magnetic field into.Improvement cost is lower.

Claims

1, a kind of brushless excitation generator, it comprises and is located at generator (P ₀) three-phase electric energy on the stator produces coil (A ₀, B ₀And C ₀), be located at epitrochanterian field coil (D), constant voltage output transformer and rectifier thereof, it is characterized in that also comprising:

Generator (the P of no exciter bruss and copper ring ₀) rotor;

Rotor and described generator (P ₀) the no exciter bruss of rotor coaxial and the rotor-exciting generator (P of copper ring ₁).

2, brushless excitation generator according to claim 1 is characterized in that:

Described rotor-exciting generator (P ₁) stator be provided with permanent-magnetic field (S ₀And N ₀) and coil stimulating magnetic field (S ₁And N ₁); Rotor is provided with three phase excitation coil (A ₂, B ₂And C ₂) and rectifier (F ₁); Wherein, rectifier (F ₁) output sending and receiving motor (P ₀) epitrochanterian field coil (D).