SU855906A1 - Device for position control of drive - Google Patents

Description

(54) DEVICE FOR POSITIONAL DRIVE CONTROL

one

The invention relates to electrical engineering and can be used for positional control of a rotary actuator, such as mechanisms for changing light filters, transparencies, as well as other multi-position devices, such as heads in revolving walls.

Devices for positional control of the actuator are known, which are mainly constructed on the relay-contact elements C and 2.

The disadvantage of these devices is reliability due to the large number of contact elements. In addition, in the device (1 there is no possibility of moving from one extreme position to another along the shortest path, which degrades the dynamic characteristics of the drive.

The closest technical solution to the invention is a device for positional control of the actuator, containing elements for specifying the stop point, sensors for the actual position of the actuator, and an actuator with two locking elements (3.

The disadvantage of this device is that it has low reliability, due to the presence of the elements of the task of the stopping point with two simultaneously activated contact nodes.

The purpose of the invention is to increase the reliability and automatic selection of the direction of the shortest path and place where the drive stops.

The goal is achieved by introducing into the device a matrix consisting of n input buses, at least 2p output buses, no more than n (n + 1) AND gates, no more than 2n OR gates and resistors according to the number of output buses, each input bus is connected to a corresponding sensor of the actual actuator drive, each output of the stop point setting elements is connected to two resistors, the second output of the first resistor is connected to the odd output output, the second output of the second resistor is connected to the even output output co sponding pair of output lines, the odd output buses via the OR gates

connected via one of the blocking elements with the first input of the executive body, and even output buses are similarly connected to the second input; you can get the control unit, the output of the actual actuator sensors are connected to one of the power supply terminals, the other output of which is connected to the stop inputs , each bus of one pair of output buses through a logical element And is connected to the corresponding input bus, at the same time each input bus with number i is connected through a logical element And with an even Noah output bus. of the pair with the number k provided

K- - J - H / Jtc K 1, f nf7U K V,

And With odd output tires in the remaining cases with k i, and with / k - i / | the output bus with number i is connected through the logical element I with any single ishna

pairs with number k.

The drawing shows a diagram with an embodiment of the device.

The device for positional control of the drive contains the element 1 specifying the stopping point, sensors 2-8 of the actual position of the actuator, input buses 9, odd output tires 10 and even output buses 11 are connected in pairs through resistors 12 to all outputs of the element 1 specifying the stop position. All odd output buses 10 through the elements OR 13-19 and the contacts 20 of the relay 21 are connected to the windings of the relay 22. The relay determines the positive direction of the drive turn. All even-numbered output buses 11 through elements 23-29 OR are connected via pin 30 of relay 22 to the relay coil 21, which determines the negative direction of rotation of the drive. Logic elements AND 31-86i are also included in the matrix, which solve the problem of choosing the optimal direction of rotation of the drive and stopping it when the given position is occupied ... a.

The device works as follows. In order to ensure the shortest switching time from the first position to the fifth, it is necessary to rotate the drive through the x position, which corresponds to the negative direction of rotation of the drive. In the initial position, the contacts of the sensor 2 of the actual position are closed. When the element 1 sets the stop point to the position g, the supply voltage through the corresponding resistor 12 and normally closes: The contact 30 is applied to the relay coil 21. At that, the diode 63 through the closed contact of the actual position sensor 2 plunts the winding of the relay 22.

Relay 21 turns the drive in a negative direction. Contact 20 of this relay opens the supply circuit of the winding of the relay 22 n, thus blocking the supply of power to this winding when opening the contacts of the sensor 2 of the actual position, which occurs when the drive rotates. When occupied by the actuator of the fifth / g / position, the contacts of the sensor 6 of the actual position are closed. Wherein

a diode 70 through the contacts of the sensor 6 of the actual position; It shunts the coil of the relay 21, as a result of which the drive stops. In the event that the drive moves to the g position in the positive

In this case, the drive is switched off by shunting the winding of the relay 22 with a diode 64 through the closed contacts of the sensor 6 of the actual position. Similarly, the scheme works in any other variant of switching. By appropriately switching on the AND logic elements (diodes) in the matrix, any algorithm for switching the drive off can be carried out. The number of elements And may be less if the drive is switched to some position in one direction, since in this case only the output bus is used.

The proposed position control device for the drive in n positions allows

increase reliability, reduce drive switching time by introducing circular reversing motion.

Claims (3)

1. USSR author's certificate N 570882, kp. G 05 B 19/08, 1977. 2. USSR author's certificate No. 408441, cl. H 02 P 1/00, 1973. 15 3. USSR author's certificate No. 431611, cl. H 02 P 1/00, 1975.