SU1586932A1 - Arrangement for controlling excitation of traction generator of diesel-generator unit of diesel locomotive - Google Patents

Abstract

The invention relates to transport, in particular, to devices for controlling the excitation of a traction generator of a diesel generator set of diesel locomotives, and is aimed at improving reliability. The regulator 1 of the excitation current of the traction generator is connected to the output of the dynamic voltage regulator 2 and the driver 3 sets the power. A sensor 4 of the rotational speed of the diesel generator set is connected to the inputs of the imaging unit 3 and through the key element 5 to the inductive sensor 6 of the integrated diesel controller. With a constant position of the controller 7 of the driver or increasing the position number, the signal at the outputs of the code-analog converter 8 and time delay blocks 9-11 is zero. The power reference signal is determined only by signals from sensors 4 and 6. As the position number of the controller 7 decreases, the output of the converter 8 produces a signal proportional to the difference in position numbers. Blocks 9 and 10 of the time delay increase the duration of this signal, which arrives at shaper 3, abruptly changes its transmission coefficient, and turns off sensor 6 by key element 5. The power set by shaper decreases sharply, causing an early discharge of the load taken from diesel engines. generator in relation to reducing the rotational speed of the diesel generator set, thereby creating favorable conditions for avoiding the surge of the diesel turbocharger. 2 Il.

Description

The invention relates to transport, in particular to devices for regulating the excitation of the traction generator of a diesel generator set of diesel locomotives.

The purpose of the invention is to increase reliability.

In FIG. 1 shows a structural diagram of the proposed device: in FIG. 2 is a diagram of a code-to-analog converter forming a code reduction into a pulse duration.

The device (Fig. 1) consists of an excitation current regulator 1, the output of which is connected to the excitation winding (not shown) of the traction generator, one of the inputs is to the output of the dynamic voltage regulator 2, and the other to the output of the power driver 3. One of the inputs of the shaper is connected to the sensor 4 of the rotational speed of the diesel generator set, the other input is through a controlled key element to the inductive sensor 6 of the combined diesel regulator. The controller 7 of the driver through a code-to-analog Converter 8 is connected to the input of one of the blocks 9 of the time delay. The output of block 9 is connected to the control input of the controlled key element, through the second block of time delay 10 to the third input of the driver 3 power settings, and through the third block ¹ 11 time delay to the input of the dynamic voltage regulator 2.

Code-to-analog converter 8, forming a code reduction in the pulse duration (Fig. 2), coming from the driver controller 7 through a digital-to-analog converter 12, is made on operational amplifiers 13-15, capacitor 16, diodes 17-19 and resistors 20-28. Operational amplifiers 13 and 14 perform the function of an intensity adjuster, and amplifier 15 acts as a comparator, at the output of which a signal is generated proportional to the number of reset positions, in the form of a pulse of a certain duration.

The device operates as follows.

In statistical mode, at a constant position of the controller 7 of the driver, the signal at the output of the Converter 8 is equal to zero. The signals at the outputs of delay blocks 9-11 are also equal to zero. In this case, the controlled key element 5 is closed and the reference signal for the power of the traction generator generated by the driver 3 of the power reference is determined only by the signals from the outputs of the frequency sensor 4 and inductive sensor 6.

With an increase in the position number of the controller 7 of the driver at the output of the converter 8, the signal is also equal to zero and the reference signal for power is still determined only by the signal of the sensor 4 according to the engine speed and the signal from the output of the inductive sensor 6.

When translating the controller 7 of the driver in the direction of decreasing positions, a signal in the form of a constant voltage appears at the output of the converter 8, the duration of this signal being determined by the number of reset positions. The signal received at the output of converter 8 is supplied to a time delay unit 9, which increases the duration of this signal due to a trailing edge delay by a fixed amount. The signal from the output of the time delay unit 9 opens the controlled key element 5, while the signal from the output of the inductive sensor 6 does not enter the second input of the power task generator 3, which leads to an abrupt decrease in the power signal by an amount equal to the voltage from the output of the inductive sensor 7 . Simultaneously, the signal from the output of the Converter 8 through the block 10 time delay (which, similarly to block 9 extends the pulse duration due to the delay of the trailing edge) is fed to the third input of the shaper 3 back power, abruptly reducing its transmission coefficient by a fixed amount.

Thus, the power reference signal when decreasing the positions of the driver’s controller sharply decreases, which causes an advanced load shedding; taken from the diesel engine by a traction generator, in relation to a decrease in the speed of the diesel generator set. This creates favorable conditions for eliminating surging turbocharger.

The time during which the generator operates with reduced power (with reduced selective response) depends on. the number of reset positions of the controller of the driver.

Blocks 9 and 10 increase the operating time of the traction generator with reduced power by the required minimum time, which is determined from the condition for eliminating the occurrence of surge of the compressor when the controller of the driver is moved to one position.

When the signals at the outputs of blocks 9 and 10 disappear (the diesel engine speed has a steady value in accordance with the new position of the driver’s controller), the controlled key element 5 closes, the transmission coefficient of the driver 3 of the power reference increases to the minimum value and the power reference signal sharply increases . In this case, the power set of the diesel generator set occurs at a pace determined by the dynamic voltage regulator 2. The voltage growth rate in this case is higher than in normal mode and is set by the signal from the output of the time delay unit 11. Block 11 works similarly to blocks 9 and 10 and delays the trailing edge of the pulse arriving at its input.

Thus, in the proposed device provides with virtually no delay a sharp power drop of the diesel generator while reducing the position of the controller of the driver for a time determined by the number of reset positions. To those. thereby eliminating the possibility of surge of the compressor and increasing the maneuverability of the locomotive.

Claims (1)

Claim A device for controlling the excitation of a traction generator of a diesel generator set of a diesel locomotive, comprising Proofreader A. Obruchar