JP3569586B2 - Encoder signal generation method and device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an encoder signal output method and apparatus, and more particularly, to a novel improvement for reducing the number of phases of an output signal and reducing an output line.
[0002]
[Prior art]
Conventionally, as this kind of encoder signal output method, a lead signal A, a delay signal B, a Z point signal Z indicating a Z point, and magnetic pole position signals U, V, W to the motor in FIG. 2 are used. As the number of phases, six phases are used, and when used as a line driver output, the number of lines is 12, and when the power supply line is added, the total number of lines is 14.
[0003]
[Problems to be solved by the invention]
Since the conventional encoder signal output method and apparatus are configured as described above, the following problems exist.
That is, since the number of signal lines alone is 12, the diameter of the line connecting the encoder and the driver of the motor is large, the connection work is complicated, and the bending radius is large, which is an obstacle to miniaturization, and It was difficult to reduce the cost.
[0004]
The present invention has been made in order to solve the above problems, and in particular, has an object to provide an encoder signal output method and apparatus which reduce the number of output signal phases and reduce the number of output lines. And
[0005]
[Means for Solving the Problems]
The encoder signal output method according to the present invention includes a lead signal (A), a delay signal (B), a direction signal (D), a Z point signal (Z), and a magnetic pole position signal (U, V, W) from an encoder provided in a motor. ), A quadruple signal obtained by quadrupling the lead signal and the lag signal is obtained, and the direction signal, the Z-point signal and the magnetic pole position signal are time-divided into position and direction signals. Is a method of outputting a two-phase signal of the quadruple signal and the position direction signal.
[0006]
An output device for an encoder signal according to the present invention includes a lead signal (A), a delay signal (B), a direction signal (D), a Z point signal (Z), and a magnetic pole position signal (U, V, A quadruple circuit for inputting the advance and delay signals and outputting a quadruple signal and the direction signal; and inputting the direction signal, the Z point signal, and the magnetic pole position signal, A time division circuit for outputting a direction signal, wherein the time division circuit outputs the direction signal, the Z point signal, and the magnetic pole position signal in a time division manner.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of an encoder signal generating method and apparatus according to the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 1 designates an encoder connected to a motor comprising a well-known three-phase type brushless motor (not shown). The advance signal A and the delay signal B output from the encoder 1 It is input to a quadruple circuit 2 composed of a peripheral circuit and the like.
The quadruple circuit 2 outputs a quadruple signal C, and a direction signal D for discriminating between the CW direction and the CCW direction is output from the quadruple circuit 2 and then input to a well-known time division circuit 3. .
[0008]
The time division circuit 3 receives a Z point signal Z indicating the Z point (zero point) from the encoder 1 and magnetic pole position signals U, V and W indicating the magnetic pole positions of the motor. A direction signal 10 is output. The signals A, B, C, D, Z, U, V, and W described above are output as shown in FIG. 2, but in the state of FIG. 3, the signals C, D, and Z at the position (1). , U, V, and W, the direction signal D, the Z-point signal Z, and the magnetic pole position signals U, V, and W are output in the order of position and direction signals 10 by time division.
[0009]
Therefore, when the motor is actually driven, the magnetic pole position signals U, V, and W of the position direction signal 10 are used at the time of starting the motor. As shown in FIG. 4, the magnetic pole position is assigned to the quadruple signal C, and the rotation of the motor can be controlled by the quadruple signal C and the direction signal D of the position / direction signal 10 with respect to the command pulse number and direction of the motor command.
[0010]
As described above, the signal output from the encoder 1 has only two phases, that is, the quadruple signal C and the position direction signal 10, as shown in FIG. In comparison with, the number of lines can be reduced to less than half.
[0011]
【The invention's effect】
The encoder signal generation method and apparatus according to the present invention are configured as described above, and can provide the following effects. That is, the advance signal and the delay signal are quadrupled, and the other signals are time-divisionally fed into a single signal, so that the signal line from the encoder only needs to be two-phase, which is less than half of the conventional one, and the cable diameter is reduced. The size is reduced, the assembling becomes easy, and a significant cost reduction can be achieved.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an encoder signal generation method according to the present invention.
FIG. 2 is a waveform chart of FIG. 1;
FIG. 3 is a waveform chart showing the processing of FIG. 2;
FIG. 4 is a waveform chart showing the time division processing of FIG.
[Explanation of symbols]
A advance signal B delay signal C quadruple signal D direction signal Z Z point signal U, V, W magnetic pole position signal 1 encoder 2 quadruple circuit 3 time division circuit 10 position direction signal

Claims (2)

Encoder signal that outputs advance signal (A), delay signal (B), direction signal (D), Z point signal (Z), and magnetic pole position signal (U, V, W) from encoder (1) provided in the motor. In the generation method, a quadruple signal (C) obtained by quadrupling the advance and delay signals is obtained, and the direction signal (D), the Z point signal (Z), and the magnetic pole position signal (U, V, W) are time-divided. A position direction signal (10), and a two-phase signal of the quadrupled signal (C) and the position direction signal (10) is output from the encoder (1). Encoder signal that outputs advance signal (A), delay signal (B), direction signal (D), Z point signal (Z), and magnetic pole position signal (U, V, W) from encoder (1) provided in the motor. In the generator, a quadruple circuit (2) that inputs the advance and delay signals (A, B) and outputs a quadruple signal (C) and the direction signal (D); A time division circuit (3) for receiving a signal (Z) and a magnetic pole position signal (U, V, W) and outputting a position direction signal (10), wherein the time division circuit (3) (D), a Z-point signal (Z) and a magnetic pole position signal (U, V, W) are output in a time-sharing manner.

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