CN2268337Y

CN2268337Y - high-power ac. arc-welding generator

Info

Publication number: CN2268337Y
Application number: CN 96202568
Authority: CN
Inventors: 吴文达
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-17
Filing date: 1996-02-17
Publication date: 1997-11-19
Anticipated expiration: 2006-02-17

Abstract

The utility model relates to a high-power AC arc-welding generator driven by a prime mover (a motor or a gasoline engine). The high-power AC arc-welding generator is composed of a stator (4) and a distributed polar rotor (7); the stator (4) is formed by that 60 grooves are punched on an inner ring of a stator iron core (1), and a no-magnetic-leakage AC welding winding (2) with mutually crossed three-phase and single-phase, and an auxiliary power supply winding (3) are embedded and manufactured on the stator iron core (1). A welding-current sampling module (8) is adopted to complete the excitation of the rotor and the soft start of welding process, and a brushless excitation device (9) is adopted to realize the brushless excitation of the rotor. The utility model mainly solves the problems of low efficiency, low material using ratio, and unreliable exciting mode of a carbon brush and slip rings in similar products. The utility model has the advantages of small volume, light weight and high reliability of the entire machine, the efficiency can reach more than 60%, and the material using ratio reaches 90%; the high-power AC arc-welding generator is more suitable for welding under the condition of no electrical source and supplying electrical power for other electric appliances.

Description

The high power AC arc generator

The utility model relates to a kind of high power AC arc generator that is driven by prime mover (motor, gasoline engine etc.).

Existing the type welding machine, a class belongs to power frequency 50HZ, so machine volume is big, heaviness, very inconvenient for the user of field work; And the another kind of intermediate frequency DC welder that belongs to, though it has overcome the former shortcoming, development to some extent technically, but,, only be about 40% so overall efficiency is lower because its rotor is a Lundell disk multisegmented rotor, the generator caloric value is bigger, temperature rise is higher, and stock utilization is low, only is about 20%; Its excitation system is carbon brush, sliding ring type excitation system simultaneously, so reliability is lower in the course of the work for complete machine, and easily is worn, uses very inconvenience.

The purpose of this utility model provides a kind of stator does not have excitation winding, and is wound with the stator of magnetic leakage free welding winding; Adopt distributed polar rotor; Brushless mode is excitatory; Provide rotor excitatory high power AC arc generator with current sampling module.

The utility model is achieved in that dashing the ring-shaped silicon steel sheet that 60 grooves are arranged with interior ring makes stator core (1) after folded riveting, be embedded with the magnetic leakage free three-phase of the mutual hinge of magnetic pole and the interchange welding winding (2) of single-phase intersection at stator core (1) groove, auxiliary winding (3) constitutes generator unit stator (4), and is satisfied with in the generator housing.Make rotor core (5) with cylindrical after the folded riveting of the circular silicon steel sheet that 20 grooves are arranged, the field winding (6) that is embedded with the mutual hinge of magnetic pole at rotor core (5) groove constitutes generator distributed polar rotor (7), and is installed on the generator shaft.

Generator is delivered to electronic switch (11) current sampling module (8) in by transient changing amount that weldingvoltage comparator (10) takes out welding current is housed in the current sampling module (8) that is installed on the control board after amplifying, to making electronics and pass (11) that the part of welding current is carried out adjusting excitatory and generator decline external characteristic by brushless excitation device (9) distributed polar rotor (7) of feeding.The A point of current sampling module (8) is coupled to the positive pole of generator welding output, and the B point is attached to soldering turret, and the C point is attached to rotor (7), and the D point is attached to the negative pole of generator welding output.Generator is installed on the external insulation ring (13) on the rear end of shield by the interior dead ring (12) that is installed on the generator shaft, and the rotating rectifier (14) that is installed in the external insulation ring (13) constitutes brushless excitation device (9), carries out brushless excitatory to rotor (7).

The utility model is owing to adopt above structure, so have the following advantages: because generator unit stator welding winding (2) adopts the coiling of magnetic leakage free mode, rotor (7) adopts distributed polar rotor, so overall efficiency can rise to more than 60%, stock utilization rises to more than 90%.Because generator adopts current sampling module (8), need not embedding system excitation winding in the stator core (1) and make manufacturing easy so make, make magnetic leakage free generator acquisition falling characteristic simultaneously.Because generator adopted brushless excitation device (9), thus overcome carbon brush, the excitatory method of sliding ring type is unreliable, and is easy to wear, need the shortcoming changed.

The utility model is illustrated by following pattern and instantiation: Fig. 1 is a structural representation of the present utility model.Fig. 2 is the stator core schematic diagram.Fig. 3 is the rotor core schematic diagram.Fig. 4 is the current sampling module schematic diagram.

Example: dash the ring-shaped silicon steel sheet that 60 grooves are arranged with interior ring and after folded riveting, make stator core (1), be embedded with the 10 pairs of magnetic leakage free three-phases of the mutual hinge of magnetic pole and the interchange welding winding (2) of single-phase intersection at stator core (1) groove, the auxiliary winding (3) of 10 pairs of magnetic leakage frees of the mutual hinge of magnetic pole constitutes generator unit stator (4), and is satisfied with in the generator housing.Make rotor core (5) with cylindrical after the folded riveting of the circular silicon steel sheet that 20 grooves are arranged, the field winding (6) that is embedded with the mutual hinge of magnetic pole at rotor core (5) groove constitutes the generator distributed polar rotor (7) of 10 pairs of magnetic poles, and installs on the sub-generator shaft.The A point of current sampling module (8) is coupled to the positive pole of generator welding output, the B point is attached to soldering turret, the C point is attached to rotor (7), the D point is attached to the negative pole of generator welding output, finish part sampling to welding current, the diode that weldingvoltage comparator (10) wherein is 1N4007 by three models is unified into common cathode, promptly constitute " or " logical relation, weldingvoltage is relatively detected synchronously; Electronic switch wherein (11) is connected into common cathode " three-phase half control " rectification circuit by three 3CT5A controllable silicons, its triggering signal by weldingvoltage comparator (10) " or " logic output supplies with, thereby with the part of welding current by electronic switch (11), the feed adjusting of the excitatory and falling characteristic of generator amature (7) of brushless excitation device (9).With fastening being installed on the generator shaft of interior dead ring (12) of brushless excitation device (9), the rotating rectifier of packing into (14) is anchored on the rear end of shield in external insulation ring (13) back integral body, finishes brushless excitatory to generator.Because generator amature (7) rotating speed is designed to 3200 rev/mins-3600 rev/mins,, realize one so the whole generating machine can be coaxially installed on prime mover by its casing.By the generator that said method is made, when original machine power was 10KW, its welding current was output as 40-250A.

Claims

1, a kind of high power AC arc generator that is used to weld, it is characterized in that the stator core (1) that constitutes after the folded riveting of ring-shaped silicon steel sheet of 60 grooves being arranged by interior ring upper punch, be embedded with the interchange welding winding (2) of magnetic leakage free three-phase and single-phase intersection at stator core (1) groove, the generator unit stator (4) that accessory power supply winding (3) constitutes, cylindrical dashes the rotor core (5) that constitutes after the folded riveting of the circular silicon steel sheet that 20 grooves are arranged, be embedded with the distributed polar rotor (7) that field winding (6) constitutes at rotor core (5) groove, be installed on and directly take out partly the welding current excitatory current sampling module (8) of rotor (7) of feeding on the control board, be installed on the generator shaft and constitute with the brushless excitation device (9) of axle and generator housing insulation.

2, high power AC arc generator according to claim 1, it is characterized in that constituting by weldingvoltage comparator (10) and electronic switch (11) in the current sampling module (8), and the A point of current sampling module (8) is coupled to the positive pole of generator welding output, the B point is attached to soldering turret, the C point is attached to rotor (7), and the D point is attached to the negative pole of generator welding output.

3, high power AC arc generator according to claim 1, it is characterized in that brushless excitation device (9) is by the interior dead ring (12) that is installed on the generator shaft, be installed on the external insulation ring (13) on the rear end of shield, the rotating rectifier (14) that is installed in the external insulation ring (13) constitutes.