SU1252757A1 - Electric drive with servo control - Google Patents

Abstract

The invention relates to the field of automated electric drive and solves the problem of reliability. To do this, in addition to the motor, power converter, phase discriminator, synchronizer, and reversible counter, a microinterpolator and two frequency converters, voltage, are introduced into the drive. 4 il. g (L KD SP 0 "SP"

Description

The design refers to an automated electric drive and can be used in CNC machines.

The whole purpose of the invention is to increase the reliability of the electric drive.

Figure 1 presents the block diagram of the drive unit; in fig. 2 is a diagram of a crointerpol torus; on fig.Z - diagram of the phase discriminator; On fn.4 - synchronizer circuit.

The device contains a power converter 1, a sensor 2 paths, a phase discriminator 3, a synchronizer 4, a reversible counter 5, the first 6 and second 7 keys, the first 8 and second 9 frequency converters - voltage No. 1 of the interconnect torr 10, counter 11, the elm ml AND-NO 12 and 13, capacitor 14, resistors 15 and 16, counter inputs 17-22, counter output 23, AND-24 elements 24-29, resistor 30, capacitor 31, discriminator inputs 32 and 33, discriminator outputs 34 and 35, the triggers 36 and 37, the element IS-NOT 38, the input 39 of the synchronizer, the output 4P of the clock, the input 41 of the synchronizer.

The drive (phi1 .1) consists of a series-connected power pre- (generator 1, engine with sensor 2, phase / discriminator 3, synchronizer 4 and reversible counter 5, the forward and inverse outputs of the higher bit which are connected to the control inputs respectively of keys 6 and 7, the outputs of which through the converters 8 and 9 frequency - voltage are connected to the corresponding inputs of the converter 1. To the second inputs of the keys 6 and 7, there are connected microcontroller 10, the code inputs of which are connected to the counter 5.

For example, you can use electric motors of the GTS or PT series as the motor, electric motors of the ETZI2 series as a power converter, K155IE7 binary reversible meter as the reversing counter, and K252KT1 current keys as keys.

Microintrix 10 is made on the basis of a counter 11 (Fig. 2) with a variable division factor (for example, K155IE8) and a gash rattor consisting of series-connected elements AND-NOT 12 and 13, in parallel with which PF.IM the condenser 7or 14 and the bottom are turned on pic

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Consequently, connected resistors 15 and 16, the midpoint of which is connected to the middle point of elements 12 and 13. The generator output is connected to the clock input C of the counter 11. The binary code at the inputs 17-22 of the counter 11 determines the frequency of the pulses at its output 23.

The phase discriminator 3 (fig.Z) consists of the elements AND NOT 24-29 and the elements RC 30 and 31 of the delay,

The first input of element 29 is connected to a chain of series-connected elements 27, 30, 31, 28 and 5 of the first input of element 26. To the second input is a chain of elements 24 and 25, to the third input is the middle connection point of element 27 with the second input of element 26 The third input is connected to the midpoint of connection of the elements 24 and 25. The inputs 32 and 33 of the elements 24 and 27 and the outputs 34 and 35 of the elements 26 and 29 are respectively the inputs and outputs of the discriminator 3.

The synchronizer 4 (figure 4) is made on the triggers 36 and 37 and the element EE 38. I

The device works as follows.

From the CNC machine tool, a number is received — a pulse code at the input of the synchronizer 4, to the other inputs of which a feedback signal generated in the discriminator 3 is received. In counter 5, these signals are compared, the result of which (the error) in the form of a binary code goes to the inputs of the microinterpolator 10, the number — the pulse code at the output of which corresponds to the binary code at its inputs. The pulses formed in it through the keys 6 and 7 are transmitted respectively to the transducers 8 and 9. The keys 6 and 7 are controlled from the old, nee bit of the counter 5 and are determined by the sign of the mismatch. Output signal; converters 8 and 9 are supplied as voltage to converter 1.

The inputs 32 and 33 of the discriminator 3 (Fig. 3) receive, respectively, the main and shifted pulse sequences of the feedback signals, CJ, are phased in 90. Depending on the rotation of the nigate / 1 at one of the outputs 34 and

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35, the unitary state is formed; next is the pulse intensity, which is fed to the input 39 of the synchronizer 4 (Fig. A). The clock pulses arrive at the AI input of the synchronizer A, and at its output 5 40 a sequence of pulses is formed, coinciding in phase with the clock pulses.

The “right” drive circuit is simpler, which increases its reliability.

Claims (1)

Invention Formula A follow-adjustable electric drive containing a series-connected power converter, motor, datygik path, phase discriminator, synchronizer and gearbox (U i / five five 7574 A versatile counter that also differs from the fact that, for the purpose of noBi, i- of the reliability of the electric drive, a microinterpolator, a first key connected in series and a first frequency-voltage converter, a second key and a second frequency converter- the voltage, the outputs of the reversible counter are connected to the inputs of the microinterpolar, the output of which is connected to the first inputs of the first and second keys, the second control inputs of which are connected respectively to the direct and inverse outputs of the higher p The meter counter, the outputs of the first and second frequency-voltage converters are connected respectively to the first and second inputs of the power converter. - - g 12 / 3 / 5f6 Generator Fig2 Editor O. Bugir Order 4620/48 Circulation 836 Subscription VNIIPI USSR State Committee for inventions and discoveries, 113035. Moscow, Zh-35, Raushsk nab., D.4 / 5 Production and printing company, Uzhgorod, Projecto st., 4 // .3 IchChstanenitel V.Titov Tehred M. Khodanich Proofreader V. But ha