SU1309234A1 - D.c.electric drive - Google Patents

Abstract

The invention relates to electrical engineering and can be applied in installations requiring their high dynamic properties with small adjustment errors. Improving the accuracy of regulation is provided by introducing a voltage sensor 12 at the additional poles 13 and a compensation winding 14, the output of which is connected to the input of the adder 8. In the dashym device, the accuracy of the measurement of the actual value of the voltage drop across the active resistance of the motor 1 increases temperature instability of this resistance. 1 il. t CO of CD OO 4

Description

The invention relates to electrical engineering, in particular, to automated electric drives, and can be applied in installations requiring high dynamic properties with small control errors.

The purpose of the invention is to improve the accuracy of regulation.

The drawing shows a diagram of the drive.

The DC motor contains a signal from the output of the adder 8. The last dryness, there is an algebraic summation of the instantaneous values of the voltage on the core of the electric motor I and the signal coming from the output of the sensor 12, the voltage on the additional poles 13 and the compensation winding 14 of the electric motor 1 This signal at times the time corresponding to the arrival of the pulse signal Ut from sensor 11 is proportional to

the electric motor 1 is live, the root winding S is the instantaneous value of the voltage drop of which is connected to the thyristor transducer in the active resistance of the winding to the heat sink 2, series-connected task unit 3, speed regulator 4, current regulator 5, pulse-phase system 6 poles 13 and the compensation winding 14 of the electric motor 1, and, therefore, it is also proportional to the instantaneous control, the output of which is connected to the thyristor converter 2, the sensor 7 to the current value of the voltage drop in the active resistance lenii armature winding. The bag of the motor 1, the output of which the signal Uoc from the output of the adder 8, is connected to the second input of the controller 5 measured at the moment of arrival of the pulse current, the adder 8, one input of which is the Ut signal, is recorded in analog with the sensor 9 the voltage, the output memory 10 and the storage adder 8 is connected to one input 20 its value until the next instant analog storage device 10, to the second input of which the sensor 11 is connected to the time when the current reaches the maximum value, output an analog trunk memory 10 is connected to the second input of the speed regulator 4. In addition, the electric drive contains a voltage sensor 12 at the additional poles 13 and the compensation winding 14 of the electric motor 1, the output of which is connected to the second input of the adder 8.

Electric drive way.

works as follows

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This measurement corresponds to the maximum current value of the core in the next conduction interval of the converter 2.

The resistance of the winding of the additional poles 13 and the compensation winding 14, from which the voltage is applied to the input of the voltage sensor 12, during operation of the electric motor changes in almost the same way as the resistance of the core of the electric motor RH

Thus, the proposed device provides an increase in the control accuracy by reliably measuring the rotation speed control of the motor is made by changing the current of the electric motor 1 in accordance with the magnitude of the current value of the matching voltage between the real and the active resistance of the core of the electrified current. Actually, the generator, taking into account the current occurring in the process, is measured with the help of current sensor 7 and the signal from the last output to the information input of the regulator is supplied

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All operating temperature instabilities of this resistance.

5 current. The setpoint of the track at the installation input of current regulator 5 is determined by the magnitude of the mismatch between the real and setpoint values of the electromotive force (proportional to the engine rotational speed) obtained at the output of speed controller 4. The signal Uj from block 3, proportional to the specified EMF value, is fed to the installation input of speed controller 4, to the information input of which the signal Uoc is proportional to the actual value of the EMF of the electric motor and, consequently, to its frequency of rotation. To determine the signal Uoc using sensor 11, the times when the core current reaches the maximum value in the conductivity interval of converter 2 is determined, and at these moments a pulse signal Ut is fed to the input of the analog storage device 10, to the second input of which

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Claims (1)

Invention Formula A DC electric drive containing an electric motor, the root winding of which is connected to a thyristor converter, serially connected reference block, speed controller, current regulator, a Pulse-phase control system whose output is connected to a thyristor converter, a current core motor, the output of which is connected to the second input of the current regulator, the adder, one input of which is connected to the motor voltage sensor, the output of the adder is connected to one input of the analogue igniter a device that is connected to the second input of a time sensor to reach the maximum value of the current, the output of the analog storage device is connected to the second input of the controller, and the signal from the output of the adder 8 accumulates. coming from the output of the sensor 12 voltage at the additional poles 13 and the compensation winding 14 of the electric motor 1 This signal at times corresponding to the arrival mpulsnogo Ut signal from the sensor 11 is proportional to  the instantaneous value of the voltage drop in the active resistances of the winding of the additional poles 13 and the compensation winding 14 of the electric motor 1, and, therefore, it is also proportional to the instantaneous This measurement corresponds to the maximum current value of the core in the next conduction interval of the converter 2. The resistance of the winding of the additional poles 13 and the compensation winding 14, from which the voltage is applied to the input of the voltage sensor 12, during operation of the electric motor changes in almost the same way as the resistance of the core of the electric motor RH Thus, the proposed device provides an increase in the control accuracy by reliably measuring the actual value of the voltage drop in the active resistance of the electric motor core, taking into account the temperature instability of this resistance that occurs during operation. Invention Formula A DC electric drive containing an electric motor, the root winding of which is connected to a thyristor converter, serially connected reference block, speed controller, current regulator, a Pulse-phase control system whose output is connected to a thyristor converter, a current core motor, the output of which is connected to the second input of the current regulator, the adder, one input of which is connected to the motor voltage sensor, the output of the adder is connected to one input of the analogue igniter inayuschego device to the second input of which is connected timer armature current reaches the maximum value, the output of the analog memory device connected to the second input of the regulator torus sko313092344 growth, characterized in that, for the target poles and compensation winding increase the accuracy of regulation, in it the electric motor, the output of which is connected A voltage sensor is added to the additional to the second input of the adder.