SU849406A1 - Device for control of four-phase reversible stepping motor - Google Patents

Description

(54) DEVICE FOR CONTROLLING FOUR-PHASE REVERSE STEP-UP MOTOR The invention relates to electrical engineering, in particular to electric drives, and can be used, for example, in an automatic control system for the settings of high-voltage apparatuses with stepper motors. Devices are known. For controlling a stepper motor, comprising actuating triggers encompassed by two cross-linking systems, channel switching is performed in forward and reverse sequence according to signals sent to two signal lines of switching direction. CO The disadvantage of this device is the presence of two signal channels, device set program of the stepper motor. The closest in technical essence is a device that controls a four-phase reversible motor with two actuating triggers with counting inputs, a distribution trigger connected by a counting input to the control signal bus, and a reverse signal bus 2j. The disadvantage of this device is the complexity due to the presence of three control buses. The purpose of the invention is to simplify the reversal process. The goal is achieved by the fact that the device DP controls a four-phase reversing stepper motor. It is equipped with two AND elements and two OR elements, connected to the outputs of counting inputs of actuating triggers, the first inputs to the outputs of the distribution trigger, and the second to the outputs of the And elements, the first inputs which are connected to the spring signal of the reverse, and the second - with the outputs of the distribution trigger. ,

Such an implementation of the device allows controlling the process of reversing a stepper motor through only one channel, moreover, by means of pulse signals, which simplifies the process of controlling the stepper drive.

FIG. I shows the block diagram of the device; in fig. 2 - time diagrams illustrating his work.

The device contains a bus 1 control signals, a distribution trigger 2, the counting input of which is connected to the bus I, two logical elements OR 3, 4 and two executive flip-flops 5 and 6, the counting inputs of which are connected to the outputs of the said elements 3 and 4, and the outputs connected to the ends of the windings AD of the step-by-step motor 7, two logical elements AND 8, 9 and a reverse bus 10 connected to the first inputs of the elements 8 and 9, the second inputs of which are connected to the forward and inverter outputs of the trigger 2, and the outputs to the first inputs elements 3 and 4, the second inputs are x through capacitors 11 and 12 are connected respectively to the direct and inverse outputs of flip-flop 2..

The device works as follows.

The control pulses (Fig. 2) from the bus 1 arrive at the input of the trigger 2, from the direct output (U) of which through the capacitor 11 and the element OR 3 pass to the counting input of the trigger 5, switching current in the windings A, C of the engine 7. From the inverse output of trigger 2, the pulses through the capacitor 12 and the element OR 4 arrive at the counting input of trigger 6, which switches the current in the windings

8, D. The reverse pulses from the bus 10 are fed to the inputs of the elements And 8 and

9, performing the functions of a lever signal distributor. Elements 8 and 9 are prepared by signals from the direct and inverse outputs of flip-flop 2. For example, an IW element is prepared, if a single signal is present at the direct input of flip-flop 2, the presence of a single signal indicates

that the control pulse passed from this output through the capacitor 11 to the element 3. Thus, the passage of the reverse pulse Up (Fig. 2) to the input of that actuating flip-flop, which was switched by the control pulse before it, is provided.

FIG. Figure 2 shows the time diagrams of the voltages a, b, c, d, respectively, on the windings A, B, C, D of the motor in the forward direction of movement and when signals of the reverse Up are received.

As follows from the diagrams (Fig. 2), each reverse signal leads to the preparation of a device for changing the sequence of alternating windings of a stepper motor, i.e. to change the direction of movement.

Claims (2)

1. Ivobotenko B.A. and others. Unified electronic switches of stepping motors on typical logic elements, GOSINTI, PNTPO, No. 9-68-354 / 140, 1968, p. 17-20 2. USSR author's certificate number 340050, cl. H 02 R 8/00, 1970 (prototype).