JPS63234899A - Control circuit for pulse stepping motor - Google Patents

Abstract

PURPOSE:To control a plurality of stepping motors through the minimum number of microcomputer ports by connecting the same phase stepping motors out of said plurality of stepping motors with each other and by controlling power supply with transistors. CONSTITUTION:Each reverse-current prevention diode 5 is connected with each of four one-phase-four-phase coils of a four-phase two-excitation type pulse stepping motor 4, the same phase motors of said stepping motor 4 are connected with each other, and four signal conductors are connected with a microcomputer 1 via drivers 2, to perform two phase excitation. When transistors 3 connected with power lines of said four-phase pulse stepping motor 4 are turned ON/OFF by the microcomputer 1, it is possible to drive said transistors 3 and the pulse stepping motor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to control using a 4-phase dual-excitation type pulse stepping motor, and the present invention relates to control using a VC 4-phase dual-excitation type pulse stepping motor. related to circuits.

[Conventional technology]

Fuji a, pulse (stepping) motor controller M
The manufactured circuit described in the B8613 catalog is a single control circuit, as shown in the attached document, and the circuit is different from the original version.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, even if there are a plurality of pulse stepping motors, each motor is controlled individually, and even if the motor is controlled by a microcomputer, there is a problem in that the number of microcomputer ports increases.

An object of the present invention is to control a plurality of pulse stepping motors with a minimum number of microcomputer ports.

[Means for solving problems]

The above object is achieved by connecting a plurality of four-phase two-excitation type pulse stepping motors to the same phase one and controlling the power supply to each four-phase two-excitation type pulse stepping motor with a transistor.

[Effect]

Connect the same phase of the 4-phase 2-excitation pulse stepping motor, connect the 9 signal line and the microcomputer, perform 2 excitation, and connect the transistor connected to the power supply line of the 4-phase 2-excitation pulse stepping motor to the microcomputer Vc. te ON
, the desired pulse stepping motor can be driven by turning it off.

〔Example〕

Hereinafter, one embodiment of the present invention will be explained with reference to a circuit diagram of FIG. 1 and a sequence chart of FIG. 2 in which four four-phase, two-excitation type pulse stepping motors are connected.

In Figure 1, 1 is a microcomputer, 2 is a driver IA, I
B, fc, IL), IE, IF, IG, IHl 3 is transistor QA-QB-Q C-Q Ds4 is 4-phase 2
Excitation type pulse stepping motor gx-A, Hz
-B, Mx-C, Ex-D, 5 is a backflow prevention diode and a 6.7ri resistor.

It is connected to a 4-phase 2-excitation pulse stepping motor 4 via a Vcci transistor 3 which is a power source for the 4-phase 2-excitation pulse stepping motor 4, and the transistor 3 is connected via a driver 2 in a micro-ylic manner. Same mouth'N
Connect 1 to each 4-phase 2-excitation pulse stepping motor, microcontroller IVc, υ, transistor 3 QA, QB.
, QC, and QD, and control the ON and OFF of 4-phase 2-excitation pulse stepping motors Ex-A, Bx-
B, gx-C.

Supply and stop power to FSx-D.

On the other hand, the four coils VC from phase 1 to phase 4 of the 4-phase 2-excitation pulse stepping motor 4 are each connected to a backflow prevention diode 5, and the Frx-A, hx of the 4-phase 2wJ magnetic pulse stepping motor 4 is Bx b x-C*
Ex.

In this circuit, when the Ex-A of the four-phase 211iIJ magnetic pulse stepping motor 4 is operated, an output "H" is output to the port of the microcomputer 1 as shown in FIG. With this output, nine transistors 3 are turned on, and Hx-Ar (Vcc) is supplied to the pulse stepping motor 4. At the same time, the ports g, F, G, and H of the microcomputer 1 are
It outputs pulses shown as E, F, G, and HVc in FIG. This pulse output performs four-phase two-phase excitation of Ex-A of the pulse stepping motor 4, and drives Bx-A of the pulse stepping motor 4. By performing the same control a1r for the other pulse stepping motors, each pulse stepping motor can be driven.

According to this embodiment, the number of 4-phase, 2-excitation pulse stepping motors is 41 in number, 111! Even if there are n+4 microcomputer ports, multiple pulse stepping motors can be controlled, and the number of microcomputer ports can be reduced.

〔Effect of the invention〕

According to the invention, when n 4-phase dual-excitation pulse stepping motors are controlled by one icon, n+a pulse stepping motors can be controlled by 1m+4 microcomputer ports.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a sequence chart diagram of FIG. 1. 1... Microcomputer 2... Driver 3... Transistor 4... 4-phase dual excitation pulse stepping motor 5... Diode 6... Tikoku.

Claims (1)

[Claims] In a device that performs various controls using multiple four-phase dual-excitation pulse stepping motors, such as a multi-room air conditioner, there is a circuit that controls the power supply to each pulse stepping motor, and a circuit that controls the power supply to each pulse stepping motor. A 4-phase motor that is characterized by connecting the same phase to each other, providing a signal line circuit consisting of a minimum of four lines, and controlling these with a microcomputer to control multiple pulse stepping motors with a minimum number of microcomputer ports. Control circuit for a dual-excitation pulse stepping motor.