RU192529U1 - ZERO BREAKER CONTROL DEVICE FOR THE COMPLETE COMBINE COMBINE CONTROL DEVICE - Google Patents

Abstract

Field of technology: electrical engineering. Direct use: in switching devices of controllers for roadheaders containing a zero trip. The essence of the utility model: an AC / DC converter is electrically connected to a coil of a zero trip via a high-frequency converter unit, to which a manual switching element is connected via an electronic control unit Zero-release coils. Technical result: increased reliability of the circuit breaker of the complete device to control and increase the life of the circuit breaker by eliminating the overheating of the coil of the zero trip due to automatic diagnostics and monitoring the amount of current consumed by the coil of the zero trip, as well as eliminating the constant current flow of the coil of the zero trip.

Description

Technical field

The technical solution relates to electrical engineering and can be used in the switching apparatus of control stations for roadheaders containing a zero release.

State of the art

It is known that the device for controlling the zero release of the AB-DO circuit breakers, which contains a TV1 power source, an AC to DC converter connected to it (presented in the form of a rectifier bridge VD1-VD4), which is connected as through a current-limiting element, is known (presented in the form of resistor R), and directly, the coil of the zero trip KV, while the current-limiting element is shunted when turned on by the manual switching element SB3 (protection cock ). [one]

The disadvantages of the analogue are:

- the coil of the zero release is constantly surrounded by current, which leads to its additional heating and loss of electrical energy;

- upon sticking of the cocking button of the manual switching element, the zero release fails due to overheating of the coil;

- the time for pressing the cocking button of the manual switching element is not regulated and is not limited by anything, which can lead to overheating of the release coil;

- the current in the trip circuit varies depending on the voltage drops, as a result of which the overload coil of the zero trip and the failure of the circuit breaker as a whole are possible.

A task

Provide automatic stabilization of the current consumption value in the zero release and exclude the possibility of overheating.

Technical result

Improving the reliability of the control station circuit breaker and increasing its service life by eliminating the overheating of the coil of the zero trip due to automatic diagnostics and monitoring the current consumption by the coil of the zero trip, as well as eliminating the constant current flow of the coil of the zero trip.

Utility Model Disclosure

In the control device for the zero release of the complete control device for the tunneling machine, which contains a power source, an ac-to-dc converter connected to it, a coil of a zero release connected to it, a manual switching element of the zero-trip coil, it is proposed that the ac-to-dc converter is electrically connected to the coil of the zero release through the high-frequency converter unit, to which it is connected via electronic nth control unit is a manual switching element of the zero-release coil.

The above essential features of a technical solution, different from the closest analogue, are necessary and sufficient in all cases to which the scope of legal protection of a utility model applies.

In addition, it is proposed that the electronic control unit be connected through an electronic key to an adjustable high-frequency converter of the high-frequency converter unit and executed in the form of a microprocessor and, connected to it, an indicator display unit, a signal conditioner of a switching element of a coil of a zero release, a signal conditioner of a magnitude of the consumed current, electrically connected with a power key of a high-frequency converter unit, a signal conditioner of a consumed voltage value, electric nical associated with the high-frequency transformer of the converter unit, which is connected to the trip coil is zero.

The technical solution is illustrated by an example, the implementation of which is not the only possible, but clearly demonstrates the possibility of achieving the technical result of the proposed new set of essential features.

The essence of the utility model is presented in the drawings, where:

- in FIG. 1 shows a diagram of the interaction of the blocks of the zero trip control device;

- in FIG. 2 is a diagram of the interaction of elements of an electronic control unit with elements of a frequency converter unit.

Industrial applicability

The technical solution is presented on the example of the interaction scheme of the blocks of the control circuit of the zero release of the complete control device for the tunneling machine, in which the power source (1) is connected in series through the AC to DC converter (2) and the high-frequency converter block (5) with the coil of the zero release ( 3) the protection cocking of which is carried out by the switching element (4) connected in series with the zero-release coil (3) through the electronic control unit (6) and the co-frequency Converter (5) (Fig. 1).

The electronic control unit (6) is presented in the form of a microprocessor (7) and connected to it (Fig. 2):

- through the input (10a) the driver of the signal of the magnitude of the consumed current (10);

- through the input (11a) the driver of the signal magnitude of the consumed voltage (11);

- through the input (9a), the signal conditioner (9) of the switching element (4) of the zero release coil (3);

- through the output (8a) the indicator display unit (8) of the control device.

The high-frequency converter unit (5) is presented in the form of an adjustable high-frequency converter (15) and connected to it (Fig. 2):

- control key (12);

- through a power switch (13) a transformer (14).

The microprocessor (7) is connected to an adjustable high-frequency converter (15) through its control key (12).

The generator of the signal of the magnitude of the consumed current (10) is connected to the power switch (13), and the generator of the signal of the magnitude of the consumed voltage (11) is connected to a transformer (14) to which the coil of the zero release (3) is connected.

The operation of the device.

In the initial state, after supplying the supply voltage to the control device, a logical “0” is set at the input (9a) of the microprocessor (7). At the output (15a), there are no control pulses for the high-frequency converter unit (5). The output voltage at the output of the adjustable high-frequency converter (15) is zero. In this mode, the coil of the zero release (5) is not surrounded by current. This ensures energy savings and eliminates additional heat. When the switching element (4) is closed, a logical “1” signal is generated at the input (9a) of the microprocessor (7). At the output (15a), a control signal of the high-frequency converter unit (5) is generated. In this case, the microprocessor (7) controls: the value of the output voltage, the time spent by the switching element in the closed state, and the current consumed by the adjustable high-frequency converter (15). The voltage value is kept at the level necessary for the forced inclusion of the zero release. The current flow time of the forced inclusion of the zero release is limited to a predetermined value. The time spent by the switching element (4) in the closed state is limited and should not exceed a predetermined value. The current consumed by the adjustable high-frequency converter (15) must not exceed the specified parameters. This ensures the stability of the forced current, the absence of overheating of the zero release and the operation of the control device as a whole is controlled.

After the forced switching process is completed, the microprocessor (7) puts the high-frequency converter in the mode of holding the zero release in the on state. In this case, the output voltage by the adjustable high-frequency converter (15) is reduced to the level necessary to ensure that the zero release is kept in the on state without overheating. This ensures a reduction in energy consumption, ensures stable operation of the device when voltage changes in the supply network, eliminates overheating of the zero release.

In the event of emergency conditions associated with sticking of the switching element, protection against exceeding the permissible time spent by the switching element (4) in the closed state is activated. The microprocessor (7) turns off the high-frequency converter and gives a signal to the indicator display unit (8). This ensures that the switching element (4) is in good condition, which increases reliability and eliminates overheating of the zero release.

If the set parameters of the consumed current deviate due to malfunction of the elements of the high-frequency converter unit (5) or the zero-release coil (3), the microprocessor (7) turns off the adjustable high-frequency converter (15) and gives a light signal on the panel of the indicator display unit (8) ) This increases the level of service and simplifies the algorithm for identifying a fault in the circuit breaker as a whole.

Information sources:

1. AUTOMATIC AV-DO SWITCH, Operation manual PIZhTS.641452.005RE, p. 22

Claims (2)

1. The control device for the zero release of the complete control device for the tunneling machine, which contains a power source (1), an AC / DC converter connected to it (2), an electrically connected coil of a zero release (3), a manual switching element (4) of the coil zero trip (3), characterized in that the AC / DC converter (2) is electrically connected to the coil of the zero trip (3) through the high-frequency converter unit (5), to which the manual switching element (4) of the zero release coil (3) is connected via the electronic control unit (6). 2. The zero release control device according to claim 1, characterized in that the electronic control unit (6) is connected via an electronic key (12) to an adjustable high-frequency converter (15) of the high-frequency converter unit (5) and is made in the form of a microprocessor (7) and the indicators display unit (8) connected to it, the signal conditioner (9) of the switching element (4) of the zero release coil (5), the current conditioner of the current consumption (10), electrically connected to the power switch (13) of the high-frequency conversion unit STUDIO (5), the magnitude of signal shaper consumed voltage (11), electrically connected to the transformer (14) the high-frequency inverter unit (5) to which zero shunt release (3) connected to the coil.

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