Synchronous Motors for Mining Applications

Large-scale synchronous motor ventilation for mines is open-type natural
ventilation or can be made into fully enclosed pipeline ventilation.
High-voltage synchronous motor base for mine: welded by steel plate, the lower
part of the base is the outlet end of the motor.
The stator core of the synchronous synchronous motor is made up of fan-shaped
sheets punched by 0.5 mm thick low-loss silicon steel sheets, and the core
segments are separated by radial ducts; the windings are formed by double-stack
windings with short spans, using B Class insulation or Class F insulation,
temperature rise according to Class B assessment to facilitate extended service
life; winding ends are reliably fixed and ligated, and vacuum pressure
impregnated solventless lacquer process (VIP) is used, which is repeated
several times during the manufacturing process. The inter-turn pulse withstand
voltage and the ground pressure test, the motor insulation performance is
excellent and reliable, the mechanical strength is good, and the moisture
resistance is strong.
Rotor of mine synchronous motor: The magnetic pole is made of steel plate and
is mounted on the rotor yoke together with the magnetic pole coil. The magnetic
pole coil is B-class or F-class insulation. When the user adopts pneumatic
clutch, it can be designed according to user requirements. Or shaft punching.
（The center is long through hole, the shaft end is blocked, the air head is
installed on the shaft head, and the other end is processed as required, and
the bolt hole is connected to the rotary joint of the air clutch.)
The high-voltage mine synchronous motor is suitable for working in an indoor
environment where the altitude does not exceed 1000 m, the temperature of the
cooling medium does not exceed 40 degrees, there is little dust, and there is
no corrosive gas such as steam, acid or alkali. This series of motors is rated
at 6000V and can also be supplied with 3000V and 10000V according to user
requirements. The allowable voltage has a deviation range of +5%, the rated
power supply frequency is 50 Hz, and the rated power factor is 0.9 (leading).

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