SU583527A1 - Step motor control arrangement - Google Patents

Description

one

The invention relates to electric drives and can be used to control stepper motors in automatic control systems of mechanisms.

A device for controlling stepper motors with a change in switching mode is known, which makes it possible to regulate the step size of the motor 1.

The closest in technical essence and the achieved result to the invention is a device for controlling a stepper motor with a variable switching mode, comprising a pulse distributor, each channel of which includes a trigger and a switching mode block equipped with a control input connected to two outputs respectively with zero and single inputs of triggers of all channels 2.

A disadvantage of known devices lies in their complexity and, consequently, low reliability, due to the large number of elements and connections, which increase with an increase in the number of states during switching.

The purpose of the invention is to simplify the device and increase its reliability.

The goal is achieved by the fact that the switching mode block contains two AND elements, a clock trigger and a digital drive with an input synchronizer connected by its first input to the control input, the second and third inputs to the clock trigger outputs and the drive output to the first inputs elements And, the second inputs of which are connected to the outputs of the clock trigger, and the outputs - to the zero and single inputs of the triggers of all channels of the distributor.

The drawing shows a block diagram of the device.

The proposed device contains an annular register 1 (pulse distributor) with triggers 2, controlled by a counting input, a unit 3 for setting the initial state and a block 4 for switching mode1.1 mutation consisting of synchronizer 5, digital storage 6, clock trigger 7 and elements I 8. q.

Claims (2)

The device works as follows. When the supply voltage is applied, unit 3 generates a short-term signal on the SE bus, .xiacaHOBKa, to the initial state, providing 11C1 a certain combination of trigger state 2, Each pulse that enters the input T shifts the information recorded in register 1 by one bit . If on. in de and register 1 is a zero signal, then the shift of the register will be provided in the sequence, A .... If there is a single signal at the input R, then the switching will occur in the E sequence, A - A, - A, -. . . . The constant shift of the recorded information, the formation corresponds to the operation mode with a step determined by the engine design, for example, when the sequence of switching channels of type A, - D ..., AJ, A, - A, g if 9 2. ... OR OR , A, A - A. A - A A L D U - 5 A A, A. t 3 + b 3 + 5 This type of switching takes place at a zero signal at the input W of the switching mode block. When a V / single signal is applied to the input, Split Angle mode is provided. In this case, the signal from the control input W is fed to the digital accumulator 6 through the synchronizer 5. From the output of the accumulator, the signal goes through the AND 8 and 9 elements across to the WHUN and WHK buses of the register 1. At the same time, on the WHJ and WHK buses , according to the switching cycles of the trigger 7, alternately zero and single signals appear. If a zero signal appears on the WHHJ bus, then trigger 2 does not have a state change from zero to one, and if a zero signal appears on the MHK bus, then the transition from the NIN to the zero state is prohibited. The successive prohibition of the transfer of triggers 2 from one state to another provides a longer and shorter time for triggers to be in a single state in comparison with the recording mode of information on input 5Е, which ensures a change in the value of engine pitch. The synchronizer 5, which is installed at the input of the accumulator b and controlled by the clock trigger 7, prohibits switching from the Dividing the angle mode to the Constructive angle mode at the time instants not relevant to the register 1. The proposed device allows a reduction in the number of elements in the circuit, especially with an increase in the number of phases of the stepper motor, thereby increasing the reliability of operation, and also provides the possibility of changing the magnitude of the motor pitch during its operation. Claims An apparatus for controlling a variable-mode switching stepper motor, comprising a pulse distributor, each channel of which includes a trigger and a switching mode block provided with a control input connected to two outputs respectively of zero and single inputs of the distributor, differing the fact that, in order to simplify and increase the reliability, the switching mode block contains two AND elements, a clock trigger and a digital drive with an input synchronizer, This nepBiJM has its input with the control input, the second and the third - with the clock trigger outputs and the accumulator output - with the first inputs of the And elements, the second inputs of which are connected to the outputs of the clock trigger, and the outputs to the zero and single inputs of the trigger of all distributor channels . Sources of information taken into account in the examination: 1. Discrete electric drive with stepper motors, under total. ed. M.G. Chilikina, M.-L. Energy, 1911, p. 66-75, 220-226. 2. USSR author's certificate number 377950, cl. H 02 R 7/58, 1970. 5 2 AI 3 A / j A)