SU1254188A1 - System for phase regulation of rotational speed of motor-generator - Google Patents

Description

The invention relates to mechanical engineering, in particular to engine-building, namely to systems for automatically controlling the speed of rotation of primary engines of generating sets.

The purpose of the invention is to increase the efficiency of the system by improving the quality of transients with changes in engine-generator load.

FIG. 1 is a block diagram of a system; in fig. 2 - timing charts of signals at the outputs of individual elements of the system.

Phase frequency control system Vrach contains a frequency meter 1, a master device 2, an adder 3, a control signal former 4, a power amplifier 5 and an energy carrier supply device 6 forming the control loop but open ;; frequency tuning. The resistive-load sensor 7 and the load-boosting pulse shaper 8 form a control channel for vozmusheniyu. The phase discriminator 9, the inputs of which are connected to the adjustable frequency source 10 and the reference frequency source 1.1, is connected to the input of the multiplication unit 12, the output of which is connected to the input of the adder 3. The setpoint 13 of the rate of change of the phase channel transfer coefficient, the integrator 14 and the nonlinear link 15 of the type The saturation is connected in series, and the output of the nonlinear link 15 is. The drying is connected to the second input of the multiplication unit 12. The input of the rectifier 16 is connected to the output ({The distributor 8 of the load shedding impulse, and the output B1 of the rectifier 16 is connected to the input of the bias generator;) 17, the output of which is connected to the reset input of the integrator 14 to the zero state where the 11r sensor output 11 is also connected (; start press.

In the implementation of the system, it is possible to use both analogue and chi (|:) dual techniques. So, as a multiplier of 12, you can use a 10-bit digital-to-analog converter on the R-2R matrix based on a two-quadrant1 0 multiplier, as an integrator 1-1 - a 10-bit counter, as a speed setting knob 13 The measurement of the transmission channel's phase-ratio is a frequency generator, and as a nonlinear link 15, a logical device, setting the limit value 1; Inu fill 10-bit., pogo counter.

The phase control system operates as follows.

In the steady state operation of the motor-generator, the integrator 14 is in the saturation state and a single signal is fed to the input of the multiplication unit 12 from the output of the nonlinear link 15. At the same time, the accuracy of stabilization of the rotation frequency is determined by the operation of the phase control channel.

At the time of the active load reset (discharge), the one-shot 17 is triggered and the integrator 14 is set to the zero state for the time t, and the zero signal is output to the input of the multiplication unit 12

nonlinear link 15. In this case, the transmission coefficient of the control channel in phase by time T, commensurate with the time of the transient control of the frequency control, becomes equal to zero and the process of controlling the rotational speed is determined

only the operation of the control loop for the frequency deviation and the control channel for the disturbance. At the end of the time interval With the signal at the output of the integrator 14 begins to increase in some

the law determined by the unit for setting the speed 13 changes the transmission coefficient of the phase channel. At this, the signal at the output of the nonlinear link 15 and, respectively, at the input of the multiplication unit 12 increases, the signal at the output of the integrator 14,

until i ex until it is equal to one, and the phase control system does not come to its original state.

By changing the setting T of the one-shot 17 and the rate of change of the phase channel gain, you can adjust

Transient Parameters by Frequency Frequency.

During start-up of the motor-generator, the integrator 14 is kept in zero state by the output signal of the start sensor 18. A, until the generator is energized. After excitation of the generator, an increase in the transmission coefficient of the phase channel from noo1 to nominal s: Thus, the introduction of the phase discriminator into operation at any phase shift between the generator and the source of the 11 reference frequency 1, does not lead to any significant changes in the regulating system. frequencies.

12

t

FIG. 2

Claims (2)

1. THE PHASE CONTROL SYSTEM OF THE ROTATION OF THE ENGINE-GENERATOR, comprising a rotational speed meter, a master device, an active load sensor connected in series, and a load shedding surge generator, connected to its inputs to the adder inputs, a control law generator, a power amplifier and the executive body of the energy carrier and sources of adjustable and reference frequency, Fig.1 connected with their outputs to the inputs of the phase discriminator characterized in that, in order to increase efficiency by improving the quality of transients during changes in the load of the engine generator, it additionally contains a rectifier, a single vibrator, an integrator with two inputs connected in series, a saturation non-linear link and a multiplication unit with two inputs and one output, and a speed change factor of the phase channel gain, connected by its output to the second input of the integrator, and the phase discriminator is connected to the second input of the multiplication unit And the last way - to one of the inputs of the adder. § 2. The system by π. 1, characterized in that it further comprises a trigger mode sensor, the output of which is connected to the input of the integrator. SU ,,, 1254188