JPS5831839B2 - Pulse motor phase control circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a phase control circuit for a pulse motor.

Excitation methods for the windings of a pulse motor for rotating the pulse motor include a 1-phase excitation force type, a 2-phase excitation force type, and a 1-phase excitation force type.
-There are three types of two-phase excitation force type.

FIG. 1 is a diagram for explaining this, in which (1) is a 1-phase excitation force type, (2) is a 2-phase excitation force type, and (3) is a 1-2 phase excitation force type.

That is, the one-phase excitation force formula is φA, φB. By sequentially exciting the windings φλ and φB, the permanent magnets in the pulse motor are sequentially attracted to each winding and rotated.

The 2-phase excitation force method sequentially excites the windings of φA, φB, φA, and φB in pairs.
This method provides smoother rotation compared to the phase excitation magnetic force method.

The 1-2 phase excitation force formula is φA, φR9φA. Each winding of φB is changed from φA only → φA and φB → φB only → φB and φ
This is a method that obtains smoother rotation than two-phase excitation by sequentially excitation as shown in A.

By the way, the conventional pulse motor phase control circuit mainly consists of a counter and a decoder, and has the disadvantage that the circuit configuration needs to be changed depending on the excitation method of the pulse motor.

Here, as an example, FIG. 2 shows a conventional phase control circuit for controlling a four-phase winding pulse motor using a 1-2 phase excitation force type.

In the same figure, CNT is an up/down counter, DE
C is a binary coded decimal input/decimal output decoder,
G1 is an inverter, G2 is a two-man NAND gate, G
3 is a three-person NAND gate.

The operation of this circuit is as follows: First, a pulse is input to the signal line 3, and the data on the signal line 8 is initialized to the counter CNT.

In this example, this initial setting data is (0)16.

Next, the L (low) level and the UH (high) level are applied to the signal line 1 to cause the counter CNT to count up and down.
Specify the counting direction and input the timing signal with a period proportional to the rotational speed of the motor to the signal line 2 to be controlled in this state.

When the counter CNT is counted up, the excitation phase control signal φA of the 1-2 phase excitation method as shown in FIG.
'tφB' sφA, φB are obtained on the signal lines 4-7.

Note that the signals OA', φB'sφA, φB are shown in FIG.
This corresponds to φA, φB, φλ, and φ100 in 3).

The conventional circuit is as described above, and has the disadvantage that it is necessary to change the circuit configuration depending on the excitation method of the pulse motor.

Therefore, an object of the present invention is to provide a versatile pulse motor phase control circuit that can control a pulse motor with the same circuit configuration for different excitation methods.

The main feature of the pulse motor phase control circuit according to the present invention is that data corresponding to the excitation method of the pulse motor to be controlled is preset in a presettable bidirectional shift register, and the shift register is set in the rotation direction of the pulse motor. The objective is to cause the shift register to output a desired excitation phase control signal by shifting it to the right or left accordingly.

FIG. 4 is a circuit diagram showing an embodiment of the pulse motor phase control circuit according to the present invention.

This embodiment can control a 4-phase winding pulse motor, and includes 4-bit bidirectional shift registers SR1 and SR2 with parallel input and output, and a two-man power NAND gate G4. G5 and inverter G6, and shift registers SR1 and S
R2 forms an 8-bit ring shift register.

Each shift register SR1, SR2 performs the operation shown in FIG. 5 by a combination of its SO and 81 manual power in synchronization with the pulse CK inputted through the signal line 19.

Data to be preset in the shift registers SR1 and SR2 is given to the signal controllers 9 to 16, and these preset data are determined according to the excitation method of the pulse motor according to the diagram.

Signal lines 17 and 18 are used to control the operating modes of the shift registers SR1 and SR2, as well as shift SO and 81 manual operation.

FIG. 7 is a diagram showing the connection relationship between the pulse motor phase control circuit of FIG. 4 and the pulse motor, where the block indicated by 100 is the pulse motor phase control circuit of FIG. 4, and 200 is the pulse motor, φA, φB.

φA and φB are windings of the pulse motor.

Next, the operation of the pulse motor phase control circuit shown in FIG. 4 will be explained.

For example, when controlling the pulse motor 200 using the 1-2 phase excitation method, first give the preset data shown in item number 1 in FIG. (It may be at H level or L level) and at the same time, a pulse is applied to signal line 19.

As a result, the preset data shown in item number '1 in FIG. 6 is loaded (preset) into the shift registers SR1 and SR2.

Next, depending on the rotation direction of the pulse motor 200, the signal line 17
．． 18 to set the shift direction of shift registers SR1 and SR2 (see FIG. 5), and by applying a timing signal with a period proportional to the rotational speed of the pulse motor 200 to the signal line 19, the shifts of shift registers SR1 and SR2 are set. The operation starts and the shift register SR
The output signal lines 20 to 23 of 1°SR2 are supplied with the excitation phase control signal 〆Al~ of the 1-2 phase excitation method corresponding to Fig. 1 (3).
φB' is obtained.

If shift register SRI. If SR2 is shifted to the right, the excitation phase control signals φA' to φB will have waveforms similar to those shown in FIG.

Similarly, when controlling the pulse motor 200 using the one-phase excitation method, item No. 2 in FIG. By loading the preset data shown in the shift registers SR1 and SR2, the output signal lines 20 to 23 of the shift registers SRI and SR2 are
is the excitation phase control signal φA/~ corresponding to Fig. 1 (1).
φB is obtained.

In addition, when controlling the pulse motor 200 using the two-phase excitation method, by loading the preset data shown in item number 3 in FIG. To 23, excitation phase side image signals φA' to φB corresponding to FIG. 1(2) are provided.
is obtained.

As described above, according to the present invention, it is possible to realize a general-purpose pulse motor phase control circuit that can be commonly applied to different types of excitation methods, and the circuit configuration is simple.
You can get many effects.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the 1-phase excitation method, 2-phase excitation method, and 1-2 phase excitation method, Fig. 2 is a circuit diagram showing a conventional phase control circuit for a 4-phase winding pulse motor, and Fig. 3 4 is a timing diagram of the excitation phase control signal of the 1-2 phase excitation method obtained by the above circuit, FIG. 4 is a circuit diagram showing an embodiment of the phase control circuit for a four-phase winding pulse motor according to the present invention, and FIG. The figure is a diagram explaining the relationship between the operation mode of the shift register in Figure 4 and its control input, and Figure 6 is a diagram showing the correspondence between the preset data to be loaded into the shift register in Figure 4 and the excitation method of the pulse motor. FIG. 7 is a diagram showing the connection relationship between the phase control circuit of FIG. 4 and the pulse motor. SRI, SR2... Bidirectional shift register, G5...
・NAND gate, G6... Inverter, 16...
Preset data input signal line, 17°...Shift register operation mode control signal-1,...Timing signal input signal line. G4゜9〜8 9

Claims (1)

[Claims] 1 Equipped with a presettable bidirectional shift register and a gate circuit that controls the operation of the shift register, and presets data in accordance with the excitation method of the pulse motor to be controlled in the shift register under the control of the gate circuit. , a pulse that obtains an excitation phase control signal for the pulse motor from the shift register by shifting the contents of the shift register in a direction controlled by the gate circuit at a period corresponding to the rotational speed of the pulse motor. Motor phase control circuit.