SU811478A1 - Six-phase stepping motor control device - Google Patents

Description

one

The invention relates to automatic control systems with stepper motors, namely, devices with six-phase motors operating in a step-by-step control mode over a twelve-cycle switching system in open and closed systems.

A device for controlling a six-phase stepper motor according to a twelve-cycle switching circuit is known, comprising its twelve-channel switch connected to the power amplifier via a decoder 1.

A disadvantage of this device is its complexity and its low reliability.

The closest to the invention to the technical essence is a device for controlling a six-phase stepper motor, comprising a six-channel ring switch, each channel of which includes a D-flip-flop and a logical element 2I-OR-NOT connected to the engine direction tires by the second and fourth inputs, and the output is with the information input of the trigger connected by the synchronization input to the clock bus, and the power amplifier

2

The disadvantage of this device is the need to establish its original state and the lack of ability to restore normal switching after a failure. The aim of the invention is to simplify

and increase device reliability.

The goal is achieved by the fact that the device is equipped with an AND-NOT element connected to two inputs with inverse outputs of the adjacent channel flip-flops, and

output with one installation input of the trigger adjacent to the two previous ones, and the other installation inputs of the trigger of each channel are connected to the inverse outputs of the triggers taken through two channels, the direct outputs of the triggers connected to the first and third inputs of the 2I-OR-HE elements taken through three channels. Such an embodiment of the device ensures the self-installation of the initial state and the automatic restoration of normal commutation at failure.

The drawing shows a diagram of the device.

The device contains a bus 1 clock, bus 2 and 3 of the direction of movement of the engine, six channels, which include triggers 4-9, logic elements 2I-OR-NE 10-15 and power amplifiers 16-21,

and also; e logical element AND-NOT 22.

The device works as follows. When 1 pulse cycle is applied to the bus, the logical unit to bus 2, and logical zero to bus 3, the following order of alternation of the trigger conditions 4-9 is provided: 110000-111000-011000-011100 - 001100-001110-000110-000111 - 000011 - 100011 - 100001-110001-110000, etc., corresponding to direct twelve-cycle switching. Before triggering the first pulse on the 1 clock bus, let the triggers 4 and 5 be in the state of one, and the triggers in the zero state. After the first pulse is applied, the trigger 6 goes to the state of unity, because at its R R D inputs there was the potential of the logical unit, the triggers 4–9 do not change their state, because before entering the pulse, it corresponds to the potential at the D input. The trigger 7 remains in the zero state, although at its D input there was a potential of a logical unit, but at the R input there was a potential of a logical zero, prohibiting the transition of the trigger to a state of one. After the second pulse is applied, the trigger 4 goes to the zero state in accordance with the potential at the D input, the triggers 5, 6, 8 and 9 do not change their state, since it corresponds to the potential at the D input; the trigger 7 does not go into the state of unity, because before the arrival of the second pulse at its R input there was a potential of logic zero. When the third and subsequent pulses are applied, the switching of the flip-flops occurs in a similar way in accordance with direct twelve-cycle switching.

If a potential of logical zero is applied to bus 2 and a logical unit to bus 3, then, when 1 clock pulse is applied to the bus, a sequence of states of the flip-flops 4-9 is provided, which corresponds to reverse twelve-cycle switching: 110000-110001 - 100001 - 100011- 000011 -000111 -000110-001110-001100-011100-011000-111000-10000, etc. When the power is turned on or as a result of a failure, a combination of states of triggers 4-9 that do not correspond to twelve-switch switching is possible. However, the analysis shows that in all cases the first impulse automatically sets one of the states of twelve-cycle switching.

The introduction of new connections ensures the formation of the required control algorithm directly at the outputs of the distributor triggers with an arbitrary initial setting, which, in addition to simplifying the device by eliminating the output decoder, eliminates the preset mode. In addition, the power supply requirements are reduced and the need for shielding the device is eliminated, since any failure will automatically restore normal operation.

Claims (2)

1. Airy V.V. and Nerses A.G. G. Reverse twelve-cycle commuting stepper motor control device. - In Sat. “Electronic technology in automation. M., “Owls. radio, 1975, vol. 7, s. 103-106. 2.Zemskov G. G. and others. The use of integrated circuits in the control system of stepper motors, - In coll., “Electronic equipment in automation M., Sov. radio, 1978, vol. 10, s. 203-206 (prototype).