RU186338U1 - Cabinet of electric motor control station - Google Patents

Abstract

The utility model relates to the field of electrical engineering, in particular to cabinets of electric motor control stations containing structural elements that provide protection of electric motors.

The cabinet contains a compartment for installing an active filter-compensating device, which may include at least a reactor, a tubular electric heater unit, an electronics panel, one fan unit, a power unit, a capacitor unit, an independent circuit breaker, an overvoltage limiter unit, a current transformer unit, the cabinet of the motor control station is designed in such a way as to provide all the connections between the motor control station and the active filter-compensating device roystvom within said enclosure, and connecting a motor control station to the network to carry out through this filter-active device.

The utility model is technological, provides increased reliability and efficiency of electrical equipment.

Description

The utility model relates to the field of electrical engineering, in particular to cabinets of control stations containing structural elements that provide protection for electric motors.

Motor control stations containing active filter-compensating devices at the input and sinus filters at the output are quite widespread.

The use of an active filter-compensating device and a power active filter helps prevent emergency shutdowns, equipment shutdowns and turbine rotation.

The design with a stand-alone filter installed next to the station does not provide sufficient reliability of the station when the active filter-compensating device fails. Also in this case, it is necessary to separately configure this equipment, ensure its compatibility with the control station and provide additional space for a separate active filter-compensating device, as well as create external connections, which leads to additional cable consumption and increases the likelihood of damage to such connections by external mechanical influences.

The use of sinus filters at the output as mechanisms that improve the operating conditions of electric motors is a fairly common constructive solution. Various variations of such solutions are known.

A known utility model comprising a cabinet and an electrical system with a sine filter, characterized in that the sine filter is located in a separate insulated compartment of the cabinet, made with an individual microclimate system [Pat.RU 89782, IPC Н02Н 7/08. Electric motor control station / O. A. Bychkov, A.V. Prozorov, A.N. Berry; applicant, LLC NPO Etalon. ” - 3. No. 2009129471/22; declared 07/30/2009; publ. 12/10/2009]. However, in this utility model, mechanisms are not sufficiently provided for preventing emergency shutdowns and equipment stops, which negatively affects the efficiency of the equipment.

Also known is a motor control station [3. No. 2003125022/09, IPC H02H 7/08. Submersible electric motor control station / M. A. Taranov et al .; applicant FGOU VPO AChGAA. - Declared. 08/11/2003; publ. 02/27/2005], comprising a converter consisting of a rectifier and an inverter with a control system, characterized in that the principle of converting alternating sinusoidal currents to alternating sinusoidal currents using an intermediate rectifying link and an inverting link with pulse-width modulation, which allows to maintain the efficiency of the submersible motor in case of asymmetry of the supply voltage, a four-phase power bridge rectifier is used for this, the input of which is connected it is connected to the supply phases of the electric network and the neutral wire, and the output is connected to the input of the smoothing capacitive filter, the output of the smoothing capacitive filter is connected to the power input of the power three-phase transistor voltage inverter, the power output of which is connected to the supply terminals of the submersible motor, the control inputs of the power three-phase transistor inverter connected to the outputs of the microcontroller control unit, also an indicator unit is connected to the outputs of the microcontroller control unit uu output frequency and mode control operation submersible electric sensors, capacitive smoothing to the output filter input connected to the pulsed power supply whose output is connected to the supply terminals of the control unit MCU.

The use of an active rectifier in the invention also does not provide a sufficient level of reliability of the equipment, the prevention of emergency shutdowns and equipment shutdown, which negatively affects the efficiency of the equipment.

The closest analogue to the claimed utility model is the cabinet of the control station [Pat.RU 36576, IPC H02B 1/00. Cabinet of electric motor control station / V.I. Lepekhin, V.A. Savinov, V.V. Sekirin; Applicant ZAO Elekton. - 3. No. 2003125995/20; declared 08/26/2003; publ. 03/10/2004], in which control and indication means, power equipment, a throttle compartment, a temperature control device, including a ventilation unit installed on the rear wall of the cabinet and connected to the air duct located between the side walls of the cabinet in which the air outlet openings are located, are placed, fans installed inside the cabinet, as well as a radiator built into the duct with a surface with heat dissipating elements, on the surface of the radiator facing the internal volume of the cabinet, there are force elements equipment, characterized in that the throttle compartment is a closed cavity covering the inlet part of the duct connecting the ventilation unit to the duct in its central part, and the fans supplying air to the throttle compartment are located in the upper part of the throttle compartment. In this invention, as in previous analogues, mechanisms are not sufficiently provided that prevent emergency shutdowns and equipment stops, which negatively affects the efficiency of the equipment.

The objective of the claimed utility model is to increase the reliability and efficiency of electrical equipment.

A utility model is characterized by the following set of essential features. The cabinet of the electric motor control station, which is a three-way service case, made in the form of a vertically oriented rectangular parallelepiped, which provides the ability to place controls, indicators, power equipment elements and their connections, also containing an automatic motor control station switch and a sinus filter located in a separate compartment, an electric door locking mechanism, as well as end sensors that prevent the station from starting. The cabinet contains a compartment for installing an active filter-compensating device, which may include at least a reactor, a tubular electric heater unit, an electronics panel, one fan unit, a power unit, a capacitor unit, an independent circuit breaker, an overvoltage limiter unit, a current transformer unit, the cabinet of the motor control station is designed in such a way as to provide all the connections between the motor control station and the active filter-compensating device roystvom within said enclosure, and connecting a motor control station to the network to carry out through this filter-active device.

The utility model is explained, but not limited to the drawing, which shows a general view of the cabinet of a motor control station (Fig.).

In FIG. The following items are presented: motor control station, 1, active filter-compensating device, 2.

Thus, the design is technological, provides increased reliability and efficiency of electrical equipment.

This compact and ergonomic design allows for quick component replacement, minimizing downtime. The design makes it possible to fully use the generator power, to reduce losses from higher harmonics and reactive currents. The use of a built-in active filter-compensating device and a power active filter helps prevent emergency shutdowns, equipment shutdowns and turbine rotation. In addition, the staff is not forced to install a separate active filter-compensating device and configure it for the used control station, which may be accompanied by incorrect settings, which increases work efficiency.

The utility model also reduces the length of power cables and places them inside the enclosure that protects against damage, which, in turn, increases the reliability and, accordingly, the efficiency of electrical equipment.

When the active filter-compensating device fails, the station continues to work, only the inside of the built-in active filter-compensating device is turned off.

The design is also characterized by the ability to independently disable the active filter-compensating device.

This cabinet can be used in the desert, tropics, on offshore platforms, etc.

Claims (1)

The cabinet of the electric motor control station, which is a three-way service case, made in the form of a vertically oriented rectangular parallelepiped, which provides the ability to place controls, indicators, power equipment elements and their connections, also containing an automatic motor control station switch and a sinus filter located in a separate compartment, the mechanism of electric door lock, as well as end sensors that prevent the station from starting, from characterized in that the cabinet contains a compartment for installing an active filter-compensating device, which may include at least a reactor, a tubular electric heater unit, an electronics panel, one fan unit, a power unit, a capacitor unit, an independent circuit breaker, an overvoltage limiter unit, a current transformer unit, while the cabinet of the electric motor control station is designed in such a way as to provide all the connections between the electric motor control station and the active filter compensating device inside the specified cabinet, and connect the motor control station to the network through this active filter compensating device.

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