SU1361701A1 - Oscillatory motion electric drive - Google Patents

Abstract

The invention relates to electrical engineering and can be used in power drives to create alternating forces. The goal is to extend the functionality by working with a passive load. The drive contains a speed sensor 3 shaft two-phase asynchronous motor and control system. It contains two signal conditioning units on the falling edge of the speed sensor pulses, trigger 4 and two keys 5 and 6. The first unit is formed. No signals are connected between the sensor plus output and the first input of the trigger 4, the second signal conditioning unit is connected between the output of the speed sensor 3 minus and the second trigger input 4. The direct output of the trigger 4 is connected to the key 5 to one winding 1 of the induction motor, and the inverse output of the trigger is connected via key 6 to the other winding 2 of the induction motor. Switching the motor windings occurs after the shaft stops. This ensures the oscillatory mode of operation of the engine, even in the absence of elastic forces of resistance, which makes it possible to use it as a vibration, an ion converter, and vibrato electromotive oscillations. 2 hp f-ly, 3 ill. (R (L 00 G1. 2

Description

one

The invention relates to electrical engineering and can be used in sources of alternating forces.

The purpose of the invention is to expand the functionality by operating under passive loading.

FIG. 1 shows a block diagram of an electric drive with signal conditioning units that do not include elements 2I; in fig. 2 is the same, with signal conditioning units including elements 2I; in fig. 3 - timeline of the drive.

The electric drive contains a two-phase motor with windings 1 and 2, a motor shaft speed sensor 3, for example an inductive motor, and a control system connected to the motor windings 1 and 2. The control system contains two signal forming units on the falling edge of the speed sensor 3 pulses. The control system also contains an RS-flip-flop 4 and two keys 5 and 6. Keys 5 and 6 can be thyristor or transistor. The speed sensor has two outputs. Output Plus corresponds, for example, to the direction of rotation clockwise, and output Minus to the direction of rotation and counter-clockwise.

The signal conditioning units of the fi rst variant (Fig. 1) contain two single vibrators 7 and 8, two HE elements 9 and 10, and four capacitors 11-14. The signal conditioning blocks according to the second variant (Fig. 2), contain. Two elements are NOT 15 and 16, two elements are 2I 17 and 18, and two are integrated with the 1st circuit of RC circuit 19 and 20.

The first signal conditioning unit is connected between the Plus output of the speed sensor 3 and the first trigger input 4, and the second signal generation unit is between the Minus output of the speed sensor 3 and the second trigger input 4. The forward trigger 4 output is connected via key 5 to one winding 1 of the asynchronous motor and the inverse output of the trigger 4 through the key 6 to the other winding 2 of the induction motor.

In the first variant, the Plus output of the speed sensor 3 is connected via a one-shot 7 to the input of the element HE 9 and through a capacitor 11 to the first input of the trigger 4, the output of the first element NO 9 is connected via a capacitor 12 to the second input of the trigger 4,

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Output Minus of speed sensor 3 is connected through an one-shot 8 to the input of the element HE 10 and through a condensate. torus 13 with the second input of the trigger 4, - the output of the second element NOT 10 is connected through a capacitor 14 to the first input of the trigger 4.

In the second version, the output is Plus

10 speed sensor 3 is connected through the first element 15 to the first input of the element 2I 17 and through the integrating circuit 19 to the second input of the element 2I 17, the output of which is connected to

15 to the first input of the trigger 4; output Minus of speed sensor 3 is connected through the element NOT 16c with the first input of the element 2I 18 and through the integrating circuit 20 with the second input of the element 2I

20 18, the output of which is connected to the second input of the trigger 4.

The drive works as follows.

When applying voltage to the system

25 control from one-shot 7 or 8 signal is not received. However, the elements 9 and 10 pass the signal, which causes the switching of the trigger 4 and the signal from one of its outputs through the key 5 or 6 energizes the winding 1 or 2 of the electric motor. This causes the formation of torque and rotation of the engine shaft. When the engine shaft rotates, a signal is received from the sensor, for example, from the Plus output. FIG. 3, this signal corresponds to the X coordinate.

This signal triggers the one-shot 7 and the pulse arrives at the first input of the trigger 4. This does not trigger the switching of the trigger and the motor winding 2 remains under voltage. The voltage on winding 2 is shown on

FIG. 3 coordinate B. I,,.

At the end of the stroke of the motor shaft, the output signal from the Plus speed sensor 3 disappears. This causes the one-shot 7 to return to its original state. However, from the element 9, the signal goes through the capacitor to the second input of the trigger 4 and, switching it, energizes the winding 1 via the key .5 The motor shaft starts rotating in the opposite direction. The voltage across winding 1 is depicted by the coordinate A in FIG. 3. When the shaft picks up speed, from the output 3 of the sensor, the Minus signal will go to the α-single-axis 8 and start it. This signal is corresponding to 30

35

40

45

50

55

The coordinate Y is detected. From the one-shot 8, the signal through the capacitor 13 is fed to the second input of the trigger 4, which does not cause its switching. At the end of the shaft movement, the output signal Minus of the speed sensor 3 disappears. In this case, the one-shot 8 returns to the initial state, the ac of the element NE 10, the signal through the capacitor 14 arrives at the first input of the trigger 4 and switches it. Through the key 5, winding 1 is energized and the shaft starts rotating in the opposite direction. Then the cycle of operation of the control system repeats and the engine shaft thus makes torsional vibrations.

The actuator shown in FIG. works as follows.

When the power is turned on due to the absence of a signal from sensor 3, one of the windings 1 or 2 is turned on. The shaft of the days - gatel starts rotation. When a signal appears at the Plus output of speed sensor 3, a signal appears at the output of integrator 19. At the end of the movement of the motor shaft, the signal from the output Plus of sensor 3 stops flowing. Signals arrive at both inputs of element 2 and 17. The signal from the output of element 2 and 17 switches the trigger 4 and the latter through the key 5 powers the winding G. The shaft starts rotating in the opposite direction. At the same time, at the output of Minus sensor 3, a signal appears, which through the integrator 20 enters the input of element 2 and 18. At the end of the shaft movement, the signal from the output Minus of sensor 3 disappears. In this case, signals are received at both inputs of element 2I 18 and the latter switches trigger 4. Motor winding 2 is energized and the shaft starts rotating in the opposite direction. Further, the drive is operated in a similar manner.

In the proposed drive switching windings occurs after stopping the shaft. This allows

to provide an oscillating mode of operation of the electric motor even in the absence of elastic resistance forces, which expands the area of use of the proposed technical solution,

allows it to be used as a source of energy for the vibration pre-. Former movement and as a vibrator torsional vibrations.

Claims (3)

1. An oscillating electric drive comprising an electric motor, two keys connecting the motor windings with a power source, and a speed sensor with two biases associated with the control inputs of the keys, which in order to enhance the functionality by working with a passive load, two signal conditioning units were added on the falling edge of the pulse and an RS flip-flop, the outputs of which are connected to the control inputs of the keys, and the inputs - on the outputs of the signal conditioning blocks, to the inputs of which Keys speed sensor outputs. 2. The electric actuator according to claim 1, characterized in that the block "forming the signal contains a series-connected single vibrator and the element NOT, as well as two capacitors connected to the outputs of the one-oscillator and the element NOT. 3. The electric drive according to claim 1, characterized in that the block - forming the signal contains element 2I, element NOT and an integrating RC-circuit connected by an output to the first input of element 2I, an input to the input of the element NOT, an output connected to the second input of the element 2I.