Mining Electric Dump Truck Brushless Synchronous Generator and Mine Electric Dump Truck

Abstract

Disclosed are a brushless synchronous generator for an electric dump truck for a mine, and an electric dump truck for a mine. The generator comprises at least a generator rotor, a generator stator, an exciter stator (15), an exciter rotor (8) and a rotary rectifier (10), wherein the generator stator comprises a stator iron core (13) and a stator winding, and the stator winding comprises a main generator winding (11) and an auxiliary generator winding (12); the generator rotor comprises a rotating shaft (110), a rotor iron core (14) and a magnetic pole winding; the rotor iron core (14), the exciter rotor (8) and the rotary rectifier (10) are all fixed to the rotating shaft (110); and the main generator winding (11) comprises a first main generator winding and a second main generator winding which are arranged side by side, the first main generator winding and the second main generator winding are both in a star connection, and the electric angle between the first main generator winding and the second main generator winding is 30 degrees. A slip ring and an electric brush are cancelled, thereby solving the problem of periodic replacement of an electric brush of a generator, and only periodic inspection is needed, thereby reducing the maintenance costs. Three windings of the whole generator are mutually independent and have no influence on each other, thereby reducing the number of power supply devices, reducing power loss and improving the efficiency of the whole truck.

Description

technical field [0001] The invention relates to generator technology, in particular to a brushless synchronous generator for an electric mine dump truck and an electric mine dump truck, especially suitable for a large mine electric dump truck driven by an internal combustion engine with an electric transmission system. Background technique [0002] At present, the transmission system of large mining electric dump trucks mostly adopts the internal combustion engine to drive the electric transmission system. The internal combustion engine drives the synchronous generator to generate three-phase alternating current, which is supplied to the traction motor to drive the vehicle after rectification or inversion. With the continuous development of AC frequency conversion technology, the AC drive system has been widely used in dump trucks due to its high transmission efficiency and simple and convenient maintenance. [0003] At present, the synchronous generator on the large mining ...

AI Technical Summary

Problems solved by technology

[0012] The mine-used electric dump truck brushless synchronous generator provided by the present invention adopts a brushless excitation synchronous generator instead of a harmonic excitation synchronous generator, cancels slip rings and brushes in structure, and solves the problem of regular replacement of generator brushes , and after adopting the brushless excitation synchronous generator, the generator is maintenance-free and only needs regular inspection, which greatly reduces the maintenance cost of dump truck customers; the main generator winding outputs two sets of independent three-phase alternating current, and the entire motor The three sets of windings are independent of each other and do not affect each other. The outputs of the two sets of windings of the main generator respectively control one traction motor. The output voltage is rectified and inverted to supply power to the auxiliary system of the vehicle, driving the main fan, brake fan and other auxiliary systems, reducing the auxiliary power supply equipment of the mining electric dump truck. The electromagnetic parameters of the generator are relatively high, and high power density is adopted. Design, small size and light weight, effectively reducing the difficulty of vehicle layout, generator high-voltage and high-efficiency design, reducing power loss and improving vehicle efficiency

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