Purpose of the development: To replace non-economic traction electrical facilities (aunt) with new ones even in conditions of enterprises operating such types of electric locomotives (mines, mines, metrostroy, etc.).

Recommended application field: Power engineering.

Technical characteristic: Current type of power supply - permanent. Rated power supply voltage of power circuits, V - 250. Minimum supply voltage of power circuits, V - 180. Maximum power supply voltage of power circuits, V - 325. Kind of load current - alternating, three-phase. Type of load - asynchronous squirrel-cage motors. Number of electric motors - 2. Nominal power of one traction electric motor, kW - 50. Scheme of connection of windings of electric motors - Star. The maximum effective value of the first harmonic of the phase current for 100 s, A - 400. Range of regulation of the speed of electric motors, not less than, A - 1:15. The efficiency of the controller in time mode,% - 95. Stabilized supply voltage of auxiliary circuits and lighting circuits of direct current, V - 24 ± 0.7. The power source of the stabilized supply voltage of auxiliary circuits and dc lighting circuits, W - 300.

Advantages over analogues: The complex differs from existing models of contact-resistor systems with traction motors of direct current with an economical impulse (smooth) control system and the speed of traction engines. As the last developed asynchronous traction motors, which have a significant advantage over DC motors in traction variants of industrial electric locomotives.

The development stage readiness: Ready for application

Technical and economic effect: The development allows saving 40-50% of electric energy when moving electric locomotives, reducing material costs for maintenance and repair by 20-30%, increasing the coupling weight of an electric locomotive and its productivity. The first stage (0.5 years - € 12 thousand): Theoretical studies of the conditions for the operation of electric locomotives at a particular enterprise. The second stage (1 year - € 15 thousand): Development of the experimental sample. Conducting tests in the conditions of the enterprise.

Description of the development:
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Traction electric drive consists of a set of power and auxiliary devices, called KTNCH (transistor frequency controller) and two traction asynchronous electric motors with a power of 50 kW each. KTNCH (hereinafter referred to as "controller") is designed to control the traction electric drive based on asynchronous electric motors with a squirrel-cage rotor, and auxiliary electric equipment of mine electric locomotives with a coupling mass of 10-14 tons. The controller provides: - smooth acceleration of an electric locomotive with adjustable acceleration; - speed control in traction mode; - movement of an electric locomotive in coasting mode; - dynamic braking with adjustable deceleration; - reversal of the direction of movement of an electric locomotive; - limitation of motor current; - protection of the system in emergency modes; - measuring the temperature of the components of the controller and engines from sensors installed on them; - monitoring the speed of rotation of the engine from a sensor mounted on one engine; - control of the audible alarm; - blocking traffic in the absence of the driver; - indication of system operability; - current-free disconnection of the linear contactor when the supply voltage drops below the minimum level and its non-current operation when switching the stroke-brake modes; - supply of lighting circuits and auxiliary control circuits of an electric locomotive with a stabilized DC voltage; - switching of lighting circuits. The experimental model of the aunt, manufactured by OAO Electromashina, was tested at the Rodina mine at Krivoy Rog Iron Ore Combine.

corresponds technical description
Ready for implementation

Possibility of transfer abroad:
Combinated reduction to industrial level

Photo

Country Ukraine

For additional information turn to:
E-mail: gal@uintei.kiev.ua