SU1166057A1 - Device for controlling piezoelectric motor - Google Patents

Abstract

CONTROL DEVICE PLEZO-. A motor containing a series-connected adder and an amplifier, the first input of the adder is an input of the device, and the second through the first divider is connected to the inputs of a piezoelectric motor, a generator, the first source of constant voltage, the positive terminal of which is connected through the first, second, and third keys connected to the negative output, which is the fact that, in order to expand the functionality, the second and third sources of constant voltage are added, the first and Second emitter followers, inverter, second divider, first and second rectifier; the first and second transformers, the first and second storage elements, the generator output being connected to the second inputs of the first and third keys and through an inverter to the second input of the second key, the first input of which is connected to the output of the first emitter follower and to the first The first primary winding is transformed, and the output is to the first input of the second emitter follower and through the second storage element to the first output of the primary winding of the second transformer, W swarm output of which is connected to the output of the second emitter-follower, a second terminal of the primary winding of the first transformers. ra, negative output of the first source of constant voltage and; the first input of the second divider, the output of which is connected by the third input of the adder, and the second input (A with the positive output of the first source, constant voltage voltage source and the first input of the first emitter follower, the second input of which is connected to the output of the amplifier and the second input of the second emitter repetition; the secondary secondary windings of the first and 9 0) second transformers are connected respectively to the inputs of the first and second rectifiers, the positive one of the first rectifier is connected to the positive output of the second and a constant voltage, and from: a negative — with the first input of a piezomotor and a positive output of the second rectifier, the negative output of which is connected to the negative output of the third constant voltage source, the positive output of which is connected to the negative outputs of the first and second sources of constant voltage voltage and the second input of the piezomotor.

Description

The invention relates to automation and can be used in the development and creation of control devices for piezoelectric motors.

The aim of the invention is to extend the functionality of a piezomotor control device.

FIG. 1 shows a block diagram of the device in FIG. 2, timing diagrams, due to the operation of the device.

The control unit of the piezomotor contains a source of 1 volt voltage, keys 2–4, generator 5, inverter 6, emitter followers 7 and 8, amplifier 9, storage elements Yu and 11, transformers 12 and 13, rectifiers 14 and 15, divider 16 , sources 17 and constant voltage, adder 1, divider 20, and piezomotor 21. The device operates as follows. The generator 5 produces control pulses (Fig. 2c () with a constant frequency, the duration of which is equal to half the follow-up period. These pulses go to the control inputs of keys 2 and 4, causing them to open simultaneously, and through the inverter 6 to the control the input of the key 3, causing it to open in the opposite phase relative to the keys 2 and 4. The inputs of the first and second emitter repeaters 7 and 8 receive the output signal and (Fig.2 S) amplifier 9, the input of which provides the output signal Uc ; adder 19. At the first input of the adder 19 post sets the signal U, to the second input - the output signal supplied to the piezomotor and the displacement controller passing through the first motor 16 with the transfer coefficient Kp to the third input - voltage E of the voltage source 1 passing through the second divider 20 with the division factor K. Blocks 2 and 4, at the time when they are open, shunt the first and second repeaters 7 and 8, respectively. The signal U at the output of the emitter follower 7 is equal to the voltage E at the output of the first voltage source 1. Voltage

Uj at the output of the emitter follower 8 at this moment is zero. At the moment when the keys 2 and 4 are closed and the key 3 is open, the voltage at the outputs of the emitter followers is equal to the output voltage AND of the amplifier 9. Thus, during the course of the emitter follower 7, pulses are generated and (Fig. 2c) c amplitude ,,. These pulses, passed through the first element 10, are fed to the primary winding of the first upstream transformer 12. On the output of the emitter follower 8, U2 pulses are formed (Fig. 2 g) with amplitude and which, after passing through the second element 11, are fed to the primary winding of the second step-up transformer 13. The impulses allocated on the secondary windings of the first. and the second transformer 12 and 13, respectively, are fed to the inputs of the first and second rectifiers 14 and 15. The voltages of sources 17 and 18 are equal in magnitude, the transformer ratio of 12 and 13 2E is chosen to be equal. Such a choice is caused by the absence of through currents within the circuit formed by the first and second directors 14 and 15 and the second and third sources 17 and 18 of constant voltage. To obtain a symmetrical output characteristic of the regulator, the division factor Kl is chosen to be equal K-; yy: -. Kj The change in voltage at the outputs of rectifiers 14 and 15 causes a proportional Up change in voltage on the piezoelectric motor. In this case, the charge current, piezoelectric motor is proportional to the deviated voltage on it from the specified one. As the voltage on the piezomotor approaches the specified value, the charge current tends to zero. The output voltage of the regulator is shown in Fig. 2 e. At a constant predetermined voltage at the output of the regulator, there is no through current through the regulator load and the through current through the circuit formed by the first and second rectifiers 14 and 15, second and third sources 17 and 18 constant voltages.

The maximum output voltage is 1b (the devices are determined by the transformation ratios of step-up transformers 12 and 13, the type of terminals 14 and 15, and the sources of sources 1, 17 and 18, and can reach 3-20 kV. Compared to the known output The voltage of the proposed controller increases by 4.3 times, and the energy transferred to the piezomotor increases by 18 times, i.e., the load on the ability of the piezomotor displacement controller to increase, which expands the functional capabilities of the piezodigital control device.

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Claims (1)

PIEZO- CONTROL DEVICE. ENGINE containing serially connected adder and amplifier, the first input of the adder is the input of the device, and the second through the first divider is connected to the inputs of the engine, generator, the first source of constant voltage, the positive output of which is through. . therefore, the connected first, second and third switches are connected to a negative output, which requires that, in order to expand the functionality, the second and third DC voltage sources, the first and second emitter repeaters, an inverter, and the second divider are additionally introduced into it , the first and second rectifiers, the first and second transformers, the first and second storage elements, and the output of the generator is connected to the second inputs of the first and third keys and through the inverter to the second input of the second key, the first the input of which is connected to the output of the first emitter follower and through the first storage element to the first output of the primary winding of the first transformer, and the output to the first input of the second emitter follower and through the second storage element to the first output of the primary winding of the second transformer, the second output of which is connected to the output of the second emitter follower, the second output of the primary winding of the first transformer, the negative output of the first · constant voltage source and the first input of the second a divider, which output _L soedinen's third input of the adder 3, and the second input to the positive terminal of the first IC. constant i voltage point and the first input of the first emitter follower, the second input of which is connected to the amplifier output and the second input of the second emitter follower, the secondary windings of the first and second transformers are connected respectively to the inputs of the first and second rectifiers, the positive output of the first rectifier is connected to the positive the output of the second source, constant voltage, and negative - with the first input of the piezoelectric motor and a positive output [second rectifier, negative output to orogo connected to the negative terminal of the third DC voltage source, the positive terminal of which is connected with negative terminals of the first and second DC voltage source and a second input piezomotor. SU.,., 1166057 1 1166057