SU1432719A1 - Four-cycle reversible pulse distributor for stepping motor control - Google Patents

Abstract

The invention relates to electrical engineering and can be used in switches of stepper drives based on four-stroke stepping motors. The purpose of the invention is to increase reliability. The four-stroke reversing pulse distributor includes a clock and reverse control bus, inverters 3 and 4, a reversible two-digit binary counter 1 and an EXCLUSIVE LOW 1 2 element, and the high-level output of the reverse two-digit binary counter 1 is used as the output of the distributor. the counter increases the reliability of operation of the distributor due to the elimination of the ambiguity of the processing of the reverse mode and thus the elimination of possible emergency and x situations. 1 il. (L with

Description

O9

(N9

H

The invention relates to the control of electric machines and can be used in a discrete electric drive.

The purpose of the invention is to increase reliability.

The drawing shows block diagrams of a four-stroke reversing pulse distributor for controlling the motor.

The distributor contains a reversible binary counter 1, connected to a clock input with a clock bus, an input of the resolution resolution — with a control interface, and an input for asking for counting direction — with a reverse bus. Outputs counter 1 is connected to the inputs of the EXCLUSIVE element tfflH 2 whose output is connected to the input of the first inverter 3, and the input of the second inverter 4 is connected to the output of the high bit of the counter 1. The outputs of the first inverter 3, the EXCLUSIVE OR element 2, the high bit the counter and the second inverter 4 are the outputs of the distributor and are connected to the corresponding; the windings 5-8 of the motor through the power amplifiers 9-12.

The distributor works as follows.

Clock pulses arrive at a clock input from a reversible binary counter 1 and, if a potential counting dissipation signal is applied to the control bus, then counter 1 counts them, ensuring rotation of the engine shaft in one direction or another, and the direction of rotation is determined by the level of the potential signal on the reverse, i.e. at the input for setting the counting direction of the reversible binary counter 1. The TURNING OR 2 element forms at the same time the pulse consistency with the frequency at the output of the higher bit of the reversing binary counter 1, but shifted relative to it by a quarter of the period. Phase switching of windings 5 and 6, as well as 7 and necessary for normal engine operation, is provided by inverting the signals at the output of the EXCLUSIVE OR element 2 and at the output of the higher discharge of counter 1, implemented using the first 3 and second 4 inverters, respectively

. When a potential prohibition signal is sent to the control

the counter 1 stops, preserving previously recorded information on its outputs, thereby providing a fixed station of the stepper motor without loss of information.

When a stepper motor is in operation and the potential changes on the reverse bus, the reversible binary counter 1, starting with the next clock pulse, changes the counting mode (i.e., goes from the pulse addition mode to the subtraction mode or vice versa), thereby providing the reverse mode, in which lost steps or practicing extra steps are excluded.

The proposed pulse distributor for controlling a stepper motor provides higher reliability of operation due to the fact that the two-digit binary counter further comprises an input for setting the counting direction. The use of a reversible counter and the introduction of a new, simpler set of connections between the elements of the proposed distributor ensures preparatory nature of the reverse, which eliminates the loss of steps or the development of extra steps in the forbidden direction and thereby eliminates the causes of emergency or faulty situations. The distributor is implemented on two microcircuits. Pho. rmula and inventions

A four-stroke reversing pulse distributor for controlling a stepper motor, which contains control buses for clock pulses and reverse, a two-digit binary counter, two inverters and an EXCLUSIVE OR element, whose inputs are connected to the counter outputs of the counter, and the clock input of the counter is connected to the clock bus, its input counting is connected to the control bus, the output of the EXCLUSIVE OR element is connected to the input of the first inverter, and the outputs of the inverters and the EXCLUSIVE OR element are output redelitel, otlichayuschiy- the fact that, in order povshzeni reliability of the two-bit counter projectile loader comprises an input for specifying the direction of counting, coupled to bus reverse and output the most significant bit is connected to the input of the second inverter, and is output distributor.

Claims (1)

SUMMARY OF THE INVENTION A four-stroke reversible pulse distributor for controlling a stepper motor, comprising control buses for clock pulses and reverse, a two-digit binary counter, two inverters and an EXCLUSIVE OR element, the inputs of which are connected to the meter outputs, the clock input of the counter connected to the clock bus, its input account authorization is connected to the control bus, the output of the EXCLUSIVE OR element is connected to the input of the first inverter, and the outputs of the inverters and the EXCLUSIVE OR element are They are outputs of the distributor, characterized in that, in order to increase reliability, the two-digit binary counter contains an input for specifying the direction of counting connected to the reverse bus, and the output of the highest level is connected to the input of the second inverter and is the output of the distributor.