SU1367127A1 - Four-cycle reversible pulse distributor for stepping motor control - Google Patents

Abstract

The invention relates to electrical engineering, to the control of electrical machines and can be used to control a four-phase stepper motor. The purpose is to simplify and increase reliability. The distributor contains four elements TARGET OR 2-5, connected by outputs through power amplifiers 10-13 to motor windings 6-9. The first element EXCLUSIVE OR 2 is connected by inputs to the outputs of binary counter 1, which is connected to the clock pulse bus by input, and the account resolution input - to the control bus. Elements EXCLUSIVE OR 2-5 form pulses in such a way that on each adjacent winding they are shifted by a quarter of the period, thereby ensuring the rotation of the rotor of the stepper motor. 2 Il. with S (/) cfjue.1

Description

one

The invention relates to electrical engineering, control, electrical machines and can be used to control four-phase stepper motors.

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

Figure 1 shows the functional diagram of the distributor; FIG. 2 shows timing charts of its operation.

Distributor (FIGURE 1 contains a binary counter 1 connected to a clock input (G) with a clock bus, and a counting resolution input to a control bus. Outputs counter 1 is connected to the inputs of the first element EXCLUSIVE OR 2. The last output is connected to the first input of the third element EXCLUSIVE OR 3 connected to the second input to the bus (E) power supply (high potential) and to the first input of the fourth element EXCLUSIVE OR 4 o The second input of the latter is connected to the output of the second element EXCLUSIVE OR 5 connected to the second input from the bus oh Reverse, and the first input - with the highest output of binary counter 1 and the second input of the first element EXCLUSIVE OR 2, in addition, the outputs of the elements EXCLUSIVE OR 2-5 are connected to the corresponding windings 6-9 of the engine through amplifiers 10-13 of power

The device works as follows.

The clock pulses arrive at the clock input from binary counter 1 and, if the count resolution signal is present at the input C, counter 1 counts them, ensuring the rotation of the motor shaft in one direction or the other. If a count inhibit signal appears at the input Ce of counter 1, then counter 1 stops and stops the engine. The EXCLUSIVE OR 2 element generates a pulse train with the output frequency of the higher bit of binary counter 1, but shifted with respect to it in phase by a quarter of the period (Fig.2, plots b, c, d). The EXCLUSIVE OR 5 element specifies the direction of rotation of the motor. If the Reverse signal (plot h) is 1, then the EXCLUSIVE OR 5 element works like an inverter and on the winding 7 of the motor

T. 0 5 0

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five

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the inverted signal from the output of the high bit of the binary counter 1 stumbles. If the Reverse signal is O (rotation in the opposite direction), the EXCLUSIVE OR 5 element works as a repeater, TB, the output signal is equal to the signal at its first input. In this case, the winding 7 the motor receives a signal from the output of the higher bit of the binary counter I already without inversion. The elements EXCLUSIVE OR 3 and 4 work as inverters, since each of them has 1 on one of the inputs. Therefore, the signal at the output of the element EXCLUSIVE OR 3 is the inversion of the signal at the output of the element EXCLUSIVE1CEE OR 2, and the signal at the output of the element EXCLUSIVE OR 4 is an inversion of the output signal of the EXCLUSIVE OR 5 o element. Thanks to this, windings 6 and 8, as well as 7 and 9, work in antiphase, which is required for normal engine operation.

The advantage of the distributor is its simplicity. It can be implemented on two widely used chips (not counting power amplifiers), nagfimer 564IE10 (in which there are two binary counters with reset and count resolution input) and 564LP2 (in which there are four elements EXCLUSIVE OR) Reducing the number of chips and communication lines leads to increased reliability.

Claims (1)

Invention Formula A four-stroke reversing pulse distributor for controlling a stepper motor, which contains control buses for clock pulses and reverse and two elements EXCLUSIVE SHW, one of which is connected to the input of the reverse bus, and the outputs of the elements EXCLUSIVE OR are outputs, the distributor that differs from In order to simplify and improve reliability, a two-bit binary counter and two elements EXCLUSIVE OR are additionally introduced, and the inputs of the first element EXCLUSIVE OR are connected to the bit outputs of the counter, the first input of which is connected to the bus clock, the input authorization account - to the control bus, one input of second OR ISKLYUCHAYUOSCHE connected 31367127 with the output of the senior bit of the counter, the second elements EXCLUSIVE OR co-another with the reverse bus, the first, respectively, and the outputs of the third and fourth elements of the distributor used are the outputs EXCLUSIVE OR connected to the bus of the third and fourth elements of the CLI- the tani, the second - with the exits of the first and the LOVING OR, fi & .2