JPH0812567B2 - Rotating body control device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a controller for a rotating body.

Structure of conventional example and its problems Generally, in the case of a device for controlling the rotation phase of a rotating body, for example, a magnetic recording / reproducing device (VTR), a rotary head servo device for controlling the rotation phase of a rotary head and a magnetic tape are transferred and controlled. In a capstan servo device or the like that compares the reference signal and the rotation phase signal of the rotating body in phase and controls the rotating body by the obtained phase error output, in the two different signals, the reference inclination signal is compared with the comparison slope portion. A method is employed in which a trapezoidal wave having the following is formed, and the trapezoidal wave is sampled with a rotation phase signal to obtain a phase error output.

FIG. 1 is a waveform diagram showing a phase comparison operation of the conventional device. FIG. 1A shows a state in which the reference signal and the rotation phase signal are synchronized and locked in a predetermined phase relationship,
(B) shows the case where the frequency of the rotation phase signal is lower than that of the reference signal, and (C) shows the case where it is high. S2 is a trapezoidal wave formed from the reference signal S1, and one period thereof is T _i . This trapezoidal wave S2 is a reference signal S1 for phase comparison.
It is a phase comparison reference signal created from. S3 is a rotation phase signal, and S4 is a phase error output obtained by sampling and holding the trapezoidal wave S2 with the rotation phase signal S3.

A of FIG. 1 shows a state in which the rotation phase signal S3 samples the operation center (center of the inclined portion) of the trapezoidal wave S2 and is in phase synchronization. That is, this indicates that the rotating body has reached the target rotation speed (target speed). Level of the phase error output S4 in this case is a central value E _o, is the rotation period T _o is equal to the reference period _{T i (T i = T o} ).

Next, the rotation period T _o to a reference period T _i in the case of (B)
Is large, which means that the number of rotations of the rotating body is low, and it is necessary to sample the “L” level of the trapezoidal wave S2, generate an acceleration command, and quickly perform synchronous pull-in.
However, if the "L" level is sampled to generate an acceleration command and there are two reference signals S1 within one cycle of the rotation phase signal S3 during acceleration of the rotating body (i), the next sampling Suddenly sample the "H" level, generate a deceleration command to switch the rotating body from acceleration to deceleration, continue decelerating until the next "L" level is sampled, and accelerate again. The synchronization pull-in will be performed many times.

On the other hand, the rotation period T _o to a reference period T _i in the case of (C)
Is small, which means that the number of rotations of the rotating body is high, and it is necessary to sample the “H” level of the trapezoidal wave S2, generate a deceleration command, and quickly perform synchronous pull-in.
However, if the deceleration command is generated by sampling the "H" level, and there are two rotation phase signals S3 within one cycle of the reference signal S1 during deceleration of the rotating body (b), the next sampling The "L" level is suddenly sampled with, the acceleration command is generated conversely, the rotating body is switched from deceleration to acceleration, the acceleration is continued until the next "H" level is sampled, and the cycle is decelerated again. The synchronization pull-in will be performed many times.

 Here, a general description will be given.

The speed control means looks at the frequency (cycle) of one signal, and the output obtained by frequency discrimination simply indicates whether the frequency is high or low. Here, the property of the output that shows only one of the polarities is called "unidirectional".

However, in the phase control means that compares the phases of two signals, only the phase relationship between the two signals can be seen, and the difference in frequency cannot be seen. For this reason, the output obtained by the phase comparison simply shows the phase difference regardless of the frequency relationship between the two signals (regardless of which signal has a high frequency or low frequency). Therefore, when the frequency of the rotation phase signal is low with respect to the reference signal, it is not possible to obtain an output such as only acceleration for advancing the phase and conversely, when the frequency is high, only deceleration for delaying the phase. After all, it outputs the output of both "acceleration" and "deceleration" regardless of the frequency. Here, the property of the output that exhibits both polarities is "bidirectional".
I will call it.

As is clear from the above description, when the frequency of the rotation phase signal S3 is lower than the reference signal S1 (the cycle is long), that is, when T _i <T _o , the rotation speed of the rotating body is accelerated to reach the target. Even though it is necessary to perform phase pull-in close to the speed, it not only accelerates but also decelerates (because it has "bidirectionality" for both acceleration and deceleration. .) Was working.

Further, when the frequency of the rotation phase signal S3 is higher than the reference signal S1 (the cycle is short), that is, when T _i > T _o , the rotation speed of the rotating body is decelerated to bring it closer to the target speed to pull in the phase. Although it had to be done, it was not only decelerating but also accelerating (this is due to "bidirectionality").

In this way, in the phase comparison in which two different signals (reference signal S1 and rotation phase signal S3) are compared with each other, when the frequency of the rotation phase signal S3 is lower than that of the reference signal S1, only the acceleration command, and conversely the frequency When is high, only the deceleration command could not be output. That is, it was not possible to issue a command indicating "unidirectionality" of "acceleration only" or a command indicating "unidirectionality" of "deceleration only". After all, no matter which state the phase synchronization is out of, the only way to perform the phase acquisition is to repeat the acceleration and deceleration in exactly the same way, which causes a problem that the phase synchronization acquisition time becomes long. It was

An object of the present invention is to solve the problems of the prior art, and by providing "unidirectionality" to the phase control means for comparing two signals to obtain a phase error output, the phase of the phase control loop is An object of the present invention is to provide a control device for a rotating body that can reduce the synchronization pull-in time.

According to the present invention, the rotation of the rotating body is detected by a phase detecting means for detecting a rotating phase signal from the rotating body and a reference signal, and an output obtained by comparing the phase of the reference signal with the rotating phase signal. Phase control means for controlling the phase, and a first phase control signal having two or more rotation phase signals in one cycle of the reference signal.
And a second state in which two or more of the reference signals exist within one cycle of the rotation phase signal, the phase comparison and detection means detects the first state. When detected, the phase control means is set to the operation center value of the phase comparison by the second and subsequent rotation phase signals, and when the phase comparison detection means detects the second state, the rotation phase signal after detection. Is a controller for a rotating body configured to set the phase control means to the operation center value for phase comparison. With this configuration, the phase control means can have "unidirectionality" of "acceleration only" or "deceleration only", and the phase pull-in can be shortened.

The present invention also relates to frequency detecting means for detecting the number of revolutions of the rotating body, speed control means for controlling the number of revolutions of the rotating body by an output obtained by frequency-discriminating the output of the frequency detecting means, and the rotating body. The rotation of the rotating body is controlled by controlling the speed control means by the phase detection means for detecting the rotation phase signal and the reference signal, and the output obtained by comparing the phase of the reference signal with the rotation phase signal. Phase control means for controlling the phase, and a first state in which two or more rotation phase signals exist within one cycle of the reference signal,
Phase comparison and detection means for detecting a second state in which two or more reference signals exist within one cycle of the rotation phase signal, and when the phase comparison and detection means detects the first state, The phase control means is set to the operation center value of the phase comparison by the second and subsequent rotation phase signals, and when the phase comparison detection means detects the second state, the phase control is performed by the rotation phase signal after the detection. It is a control device for a rotating body configured to set the means to the operation center value of phase comparison.
With this configuration, the phase control means can have "unidirectionality" of "acceleration only" or "deceleration only", and the phase pull-in can be shortened.

The present invention also relates to frequency detecting means for detecting the number of revolutions of the rotating body, speed control means for controlling the number of revolutions of the rotating body by an output obtained by frequency-discriminating the output of the frequency detecting means, and the rotating body. The rotation of the rotating body is controlled by controlling the speed control means by the phase detection means for detecting the rotation phase signal and the reference signal, and the output obtained by comparing the phase of the reference signal with the rotation phase signal. A phase control means for controlling the phase, a frequency discrimination detection means for detecting that the speed control means is out of the frequency discrimination range, and two or more rotation phase signals in one cycle of the reference signal 1 and a second state in which two or more of the reference signals are present in one cycle of the rotation phase signal, the phase comparison and detection means are provided, and the frequency discrimination detection means determines the frequency discrimination. When detecting that there in 囲外 sets the phase control unit by the rotational phase signal in operation center value of the phase comparator, said phase comparator detecting means said first
When the state is detected, the phase control means is set to the operation center value of the phase comparison by the second and subsequent rotation phase signals,
When the phase comparison detection means detects the second state, the phase control means sets the phase control means to the operation center value of the phase comparison by the detected rotation phase signal. With this configuration, the phase control means can have "unidirectionality" of "acceleration only" or "deceleration only", and the phase pull-in can be shortened.

Further, the phase detecting means is a rotating body control device configured to step down the output of the frequency detecting means. With this configuration, it is not necessary to specially provide a phase detector for detecting the rotation phase signal in the capstan servo device.

The phase comparison / detection means is a control device for a rotating body having a counting means for stopping counting when the reference signal has been counted by two and resetting the counting means by a rotation phase signal. With this configuration, it is possible to detect the presence of two or more of the other signals in one cycle of one of the two signals to be phase-compared, and the detected output provides "one-way" to the phase control means. You can have it.

Description of Embodiments FIG. 2 is a waveform diagram for explaining the phase comparison operation of the present invention. Operations (A) and (B) corresponding to the conventional examples (B) and (C) shown in FIG. Indicates. Incidentally, the present invention, the reference signal S1 is generated, the reference signal S1 and the rotation phase signal (the output of the phase detection means for detecting the rotation phase of the rotating body) S3 is used for the phase control means of the structure It is suitable.

First, when T _i <T _o (A) is explained, “L”
The level is sampled to generate an acceleration command, and the reference signal S1 becomes 2 within one cycle of the rotation phase signal S3 during the acceleration of the rotating body.
If there is one existing condition (a), it is detected and the trapezoidal wave of the phase control means is generated by the rotation phase signal S3 immediately before the next sampling (this trapezoidal wave is used as a reference for phase comparison by the phase control means). It is a phase comparison reference signal created from the signal.) S2 is forcibly set to the operation center value (hereinafter, forced operation center is applied), and then the operation center voltage E _o can be output by sampling. Configure. As a result, the timing at which the reference signal S1 is generated is set to the rotation phase signal.
The tilt position of the trapezoidal wave S2 can be adjusted in phase with the timing of the rotation phase signal S3 by correcting with S3, and the operation center voltage E _o when the forced operation center is applied is given as the neutral command value. This neutral command value gives the center speed, and the center speed is high when viewed from a speed lower than the center speed. As a result, a weak acceleration command is given. It is possible to have a "property", and the synchronization pull-in can be performed extremely smoothly.

On the other hand, when T _i > T _o (B), the "H" level is sampled to generate a deceleration command, and two rotational phase signals S3 exist within one cycle of the reference signal S1 during deceleration of the rotating body. When the state (b) occurs, it is detected, the forced operation center is applied to the phase control means by the rotation phase signal S3 immediately before the next sampling, and then sampling is performed to output the operation center value voltage E _o . Configure so that you can. This allows
The same phase matching as in (A) is possible, and the operation center voltage E _o when the forced operation center is applied is given as the neutral command value. This neutral command value gives the center speed, and the center speed is low when viewed from a speed higher than the center speed. As a result, a weak deceleration command is given. It is possible to have a "property", and the synchronization pull-in can be performed extremely smoothly.

The above is two signals (reference signal S1 and rotation phase signal S3)
One of the signals S1 (or S3) is one of the two signals S3 (or S1), but the present invention is applicable to the case where three or more of them are present. Is.

The specific configuration of the present invention will be exemplified below, and its operation will be described in detail.

FIG. 3 is a block diagram showing a specific configuration example of the present invention.

In FIG. 3, reference numeral 1 denotes a rotating body or a motor for driving the rotating body. The frequency of the rotating body 1 is detected by the frequency detecting means 2 and the rotational phase thereof is detected by the phase detecting means 3. The output (FG signal) (a) of the frequency detection means 2 is the clock input terminal 4
It is input to the digital frequency discriminating circuit 6 of the speed control means 5 together with the clock pulse (a) input from the FG signal (a) to digitally discriminate the frequency, and the DA converted velocity error (c) is obtained and mixed. It is supplied to the drive circuit 8 via the circuit 7 to form a speed control loop for controlling the drive of the rotating body 1.

On the other hand, the output of the phase detection means 3 (rotational phase signal) (d)
Is the latch pulse generation circuit 11 of the phase control means 10 together with the clock pulse (e) input from the clock input terminal 9.
To the rotation phase signal (d) by first using the clock pulse (e)
A pulse having a width of 1 clock) and a second pulse (for example, a pulse having a delay of 1 clock from the first pulse) delayed in timing from the first pulse are created. Then, the second pulse is directly used as the latch pulse (K). Next, the first pulse is the output (S) of the frequency discrimination detection circuit 16.
Alternatively, the forced operation center pulse (K) that precedes the latch pulse (K) in timing is created by gated by the output (SO) of the phase comparison detection circuit 17 and extracting. Further, a clock pulse (F) is applied with an inhibit during a predetermined period during the latch operation. Further, the clock pulse (e) is input to the preset pulse generation circuit 12 together with the internal reference signal (k) to create a preset pulse (ko). The preset pulse (K) and the forced operation center pulse (K) are ORed in the logic circuit 13, and the OR output (SA) is used as the clock pulse (F), the latch pulse (K), and the forced operation center pulse (K). ) Is input to the digital phase comparison circuit 14 and the equivalent trapezoidal wave (sigma) formed by the internal reference signal (k) is latched (sampled and held) by the latch pulse (ki) to perform digital phase comparison. , DA comparison phase error (s) is obtained and input to the mixing circuit 7 to control the speed control means 5 to form a phase control loop. The phase comparison circuit 14 is mainly composed of a binary counter, and a predetermined count value NF of the count output is decoded by a reference signal generation circuit 15 to generate an internal reference signal (X). Since the trapezoidal wave is a signal waveform created inside the phase comparison circuit 14, it is not shown in FIG.

Then, apply (set) the above-mentioned forced motion center
The operation can be realized by, for example, a configuration in which the binary counter is preset to a count value corresponding to the operation center value by the forced operation center pulse (K).

Reference numeral 16 is a frequency discrimination detection circuit, which outputs “H” (or “L”) when the frequency discrimination circuit 5 is in the range of frequency discrimination, and outputs “L” (or “H”) when it is out of the range. . Also, 17
Is a phase comparison detection circuit, which inputs a latch pulse (K) and an internal reference signal (K), and when there are two or more other signals in one cycle of one signal, that is, the latch pulse (K) When there are two or more internal reference signals (K) in one cycle of), or conversely, when there are two or more latch pulses (K) in one cycle of the internal reference signal (K), "L" (or “H”), when one, “H” (or “L”) output (SO) is obtained. Then, both the outputs (SE) and (SO) are input to the latch pulse generation circuit 11, and the output is forced only when either or both of them are "L" (or "H"). The operation center pulse (K) is output, and the forced operation center pulse (K) is not output when it is “H” (or “L”). Choices are possible, leading to the achievement of the objects of the invention.

FIG. 4 is an operation waveform diagram of the digital phase comparison circuit 14. FIG. 4 shows that the relationship between the period T _i of the internal reference signal (K) and the period T _o of the rotation phase signal (D) is T _i = T _o , T _i <T _o , T _i >.
It is those exemplified for the case of T _o. Here, it is assumed that the frequency discriminating circuit 6 is within the discriminating range and the output (C) is "H" (or "L").

First, when T _i = T _o , the normal phase comparison operation is performed, and when the count output of the binary counter constituting the phase comparison circuit 14 reaches the predetermined count value NF, the internal reference signal (X) is output. The binary counter is generated and preset by the preset pulse (CO) delayed by one clock to the initial count value NP and counting is performed. A ramp period is provided to detect a phase error (s) by phase comparison until the next predetermined count value NF is reached. Before and after that, "H", "L" (or "L", "H") ) Level and form an equivalent trapezoidal wave. Then, the operation center position of the inclined portion is latched by the latch pulse (K). This latch output allows the phase control means 10 to hold the phase locked state. At this time, the phase control means 10 is in a state in which the phase control is normally applied.
The output (SO) of 17 is "H" (or "L"), and the forced operation center pulse (K) is not generated.

Next, when T _i <T _o , the output (SO) becomes “L” (or “H”), and the first pulse is gated by the output (SO) in the latch pulse generation circuit 11 and the forced operation center pulse ( Is output. Thus, although the preset operation is also performed by the preset pulses (co), presets the count NP _o corresponding to the operation center value by forced operation center pulse generated (h), applying a forced operation center. Therefore, as shown in the figure, when T _i <T _o , the internal reference signal (K) is generated and the forced operation center pulse (K) is generated at the timing after the preset operation by the preset pulse (K) is performed. , You can put a forced action center. However, the phase error (s) obtained by latching becomes the operation center voltage. Here, the selection of NP ₀ is the forced operation center pulse (K).
It is possible to switch from NP to NP _o , and the same switching is possible by using the inverted output (SO).

Further, when T _i > T _o, the output (so) becomes “L” (or “H”), and the first pulse is gated by the output (so) in the latch pulse generation circuit 11 and the forced operation center pulse (black) is generated. ) Is output. Then, it is also performed preset operation according to the preset pulses (co), presets the count NP _o corresponding to the operation center value by forced operation center pulse generated (h), applying a forced operation center. Therefore, as shown in the figure, during T _i > T _o , the compulsory operation center pulse (K) is generated at the timing before the internal reference signal (K) is generated, and the compulsion is the same as when T _i <T _o. You can apply motion center. It should be noted that the period T _i ′ from the operation center position to the generation of the next internal reference signal (K) (or presetting) is constant, and after the forced operation center is released, normal operation of T _i cycle is performed. Return to.

In the above description, the method of switching the preset value from NP to NP _o is illustrated as the method of applying the forced operation center, but the configuration is not limited to this. For example, by removing the logic circuit 13, the forced operation center pulse (H) and the preset pulse (K) are separately input to the phase comparison circuit 14, and the preset pulse (CO) of the binary counter constituting the phase comparison circuit 14 is It is also possible to directly control the set / reset input with the forced operation center pulse (K) to give priority to the forced operation center by prioritizing the preset operation by).

FIGS. 5, 6, 7, and 8 are first and second concrete circuit examples of the phase comparison / detection circuit 17 which is the main part of the present invention and their operation waveform diagrams.

FIG. 5 is an example of a detection circuit when two or more signals of the other exist within one cycle of one signal, and FIG. 6 (A),
(B) is an operation waveform diagram. In FIG. 5, reference numerals 18 and 19 are flip-flops (FF) with reset, and 20 is 2 inputs.
AND and 21 are two-input NAND. The internal reference signal (X) is input to the input terminal 22 and the latch pulse (X) is input to the input terminal 23, and the Q output of the first-stage FF 18 connected to the output terminal 24 is obtained as the detection output (SO).

First, when T _i <T _{o in} FIG. 6A, the FFs 18 and 19 are reset by the latch pulse (K) in the period (A), and the reference signal (K) is counted. If FF18,19 counts 2 times, FF1
Q of 8 and Q of FF19 both become "H", and the output of NAND21 is "L".
Then, AND20 is closed, the input of the reference signal (K) is stopped, and it is held in this state until reset by the next latch pulse (K). At this time, the Q output of FF18 becomes "H" at the first count and becomes "L" at the second count, and this state is maintained and remains "L" even if the next reset is performed.
The same operation is performed in the following periods (b) and (c). Here, the case where there are four reference signals (K) in one period of the latch pulse (K) in the period (A), three in the period (B), and two in the period (C) is shown. The detection output (SO) is always "L" immediately before the latch pulse (K) is generated, and the forced operation center pulse (K) that precedes the latch pulse (K) is output and the forced operation center can be applied. I understand.

Next, in the case of T _i > T _{o in} FIG. 6 (b), the reference signal (K) is counted by 1 in the period (A), the latch pulse (K) is reset, and the next reference signal (K) is reset. ) Holds this state until counting by. The same operation is performed in the following periods (b) and (c). Here, in the periods (a) and (b), there are three latch pulses (ki) in one cycle of the reference signal (k), and in (c), there are two. The detection output (SO) is always "L" immediately before the second latch pulse (K) is generated from the reference signal (K).
Therefore, it can be seen that the forced operation center pulse (K) preceding the latch pulse (K) is output and the forced operation center can be applied.

As is clear from the operation waveform diagram of FIG. 6, this circuit has a configuration in which the counter composed of FFs 18 and 19 stops counting after counting two internal reference signals (K). If there are two or more (i), the same output (so) can be obtained. Therefore, when this circuit is used as the phase comparison detection circuit 17 in FIG. 3, the frequency discrimination detection circuit 16 may or may not be used. That is, this circuit also includes the function of the frequency discrimination detection circuit 16.

FIG. 7 shows a configuration obtained by simplifying the configuration of FIG. 5 and using one flip-flop 25 with reset. First,
In the case of T _i <T _{o in} FIG. 8 (A), after resetting by the latch pulse (K) in the period (B), the reference signal (K) is counted and the Q output is “H” → “L” → “ It becomes H "and is reset by the next latch pulse (K). In this case, the signal immediately before the latch pulse (K) is "H", and an erroneous detection is made. Next period (b)
Since 4 counts, the status changes from "H" to "L" to "H" to "L", and normal detection can be performed. Further, during the period (c), since the count is 2, "H" → "L", and normal detection can be performed. From the above, normal detection can be performed when the even number is counted, but false detection is performed when the odd number is counted. Therefore, in this circuit configuration, the output (s) of the frequency discrimination detection circuit 16 described above prevents malfunctions when three or more are present in one cycle. That is, in the configuration of FIG. 7, normal detection is possible (when there are two) within the range of T _i <T _o <2 · T _i , so both detection outputs (SE), (SO) As a whole, malfunction does not occur. Further, in the case of T _i > T _{o in} FIG. 8 (b), the same operation as in the case of FIG. 6 (B) is performed and normal detection can be performed.

Incidentally, in the capstan servo device, in general, instead of providing the dedicated phase detecting means 3, a configuration is adopted in which a step-down means (or frequency dividing means) for stepping down the output of the frequency detecting means 2 is used instead. This is because the structure of the device is simplified. The present invention is also applicable to such a simplified capstan servo device,
By using the above-described step-down means instead of the phase detection means 3 in the figure, the same effect can be obtained.

EFFECTS OF THE INVENTION As is apparent from the above description, in the present invention, it is detected whether or not two or more signals of the reference signal and the rotation phase signal are present in one cycle of the other signal, By applying the forced operation center when there are two or more, the phase control means can be given "unidirectionality" of "acceleration only" or "deceleration only", and phase synchronization pull-in can be performed very smoothly and , The pull-in time can be shortened.

[Brief description of drawings]

FIG. 1 is a waveform diagram showing a conventional phase comparison operation, FIG. 2 is an operation waveform diagram in a rotating body control device of the present invention, and FIG. 3 is a block diagram of a rotating body control device according to an embodiment of the present invention. 4 is an operation waveform diagram in the same embodiment, FIG. 5 is a circuit diagram showing a specific example of the phase comparison detection circuit in the same embodiment, FIG. 6 is an operation waveform diagram thereof, and FIG. 7 is a phase comparison detection circuit. FIG. 8 is a circuit diagram showing another specific example of the above, and FIG. 8 is an operation waveform diagram thereof. 1 ... Rotating body, 5 ... Speed control means, 10 ... Phase control means, 16 ... Frequency discrimination detection circuit, 17 ... Phase comparison detection circuit.

Claims (14)

[Claims] 1. A phase detecting means for detecting a rotation phase signal from a rotating body, a reference signal, and an output obtained by latching a phase comparison reference signal generated from the reference signal with the rotation phase signal. Phase control means for controlling the rotation phase of the rotating body, a first state in which two or more of the rotation phase signals exist within one cycle of the reference signal, and the reference signal within one cycle of the rotation phase signal Phase comparison and detection means for detecting two or more second states, wherein the phase control means includes the first and second phase comparison and detection means.
When the state is detected, the phase comparison reference signal is preset to the operation center value of the phase comparison by the rotation phase signal after the second detection, and when the phase comparison detection means detects the second state. A control device of a rotating body configured to preset the phase comparison reference signal to the operation center value by a detected rotation phase signal, and to perform the latch immediately after the presetting of the operation center value. . 2. A phase control detecting means for forming a preset pulse from a reference signal, a preset pulse generating means for generating a preset pulse from the reference signal, a latch pulse from the rotation phase signal, and a pulse preceding the latch pulse in timing. Latch pulse generating means for generating the forced operation center pulse extracted by the output of the above, and a binary counter for counting the clock pulse, the initial value (N
P) is preset to generate a trapezoidal wave for phase comparison, the trapezoidal wave is latched by the latch pulse to obtain a phase error output, and a predetermined value of the output of the binary counter is decoded to A reference signal generating means for generating a reference signal, and a configuration in which the operation center value (NPo) for phase comparison is preset in the phase comparison means by the forced operation center pulse. 1
The control device of the rotating body according to the item. 3. The rotation according to claim 1, wherein the phase comparison and detection means has a counting means for stopping counting when the reference signal is counted two times, and the counting means is reset by a rotation phase signal. Body control device. 4. A frequency detecting means for detecting the number of revolutions of the rotating body, a speed control means for controlling the number of revolutions of the rotating body by an output obtained by frequency-discriminating the output of the frequency detecting means; By controlling the speed control means by the phase detection means for detecting the rotation phase signal and the reference signal generated and latching the phase comparison reference signal created from this reference signal with the rotation phase signal. Phase control means for controlling the rotation phase of the rotating body, a first state in which two or more rotation phase signals exist within one cycle of the reference signal, and the reference signal within one cycle of the rotation phase signal And a second state in which there are two or more states, the phase comparison and detection means includes the phase comparison and detection means.
When the state is detected, the phase comparison reference signal is preset to the operation center value by the rotation phase signal after the second detection, and when the phase comparison detection means detects the second state, the rotation after the detection is performed. A controller for a rotating body configured to preset the phase comparison reference signal to the operation center value by a phase signal, and to perform the latch immediately after the presetting of the operation center value. 5. The rotating body control device according to claim 4, wherein the phase detecting means is configured to step down the output of the frequency detecting means. 6. The rotation according to claim 4, wherein the phase comparison / detection means has a counting means for stopping counting when the reference signal is counted two times, and the counting means is reset by a rotation phase signal. Body control device. 7. A phase comparison detecting means for forming a preset pulse from a reference signal, a preset pulse generating means for generating a preset pulse from a reference signal, a latch pulse from a rotation phase signal, and a pulse preceding the latch pulse in timing. Latch pulse generating means for generating the forced operation center pulse extracted by the output of the above, and a binary counter for counting the clock pulse, the initial value (N
P) is preset to generate a trapezoidal wave for phase comparison, the trapezoidal wave is latched by the latch pulse to obtain a phase error output, and a predetermined value of the output of the binary counter is decoded to A reference signal generating means for generating a reference signal, and a configuration in which the operation center value (NPo) for phase comparison is preset in the phase comparison means by the forced operation center pulse. Four
The control device of the rotating body according to the item. 8. The rotation according to claim 7, wherein the phase comparison and detection means has a counting means for stopping counting when the reference signal is counted two times, and the counting means is reset by a rotation phase signal. Body control device. 9. A frequency detecting means for detecting the number of revolutions of the rotating body, a speed control means for controlling the number of revolutions of the rotating body by an output obtained by frequency-discriminating the output of the frequency detecting means; By controlling the speed control means by the phase detection means for detecting the rotation phase signal and the reference signal generated and latching the phase comparison reference signal created from this reference signal with the rotation phase signal. Phase control means for controlling the rotation phase of the rotating body, frequency discrimination detection means for detecting that the speed control means is out of the frequency discrimination range, and the rotation phase signal is 2 in one cycle of the reference signal. And a phase comparison detection unit that detects a second state in which one or more reference signals exist in one cycle of the rotation phase signal. The means presets the phase comparison reference signal to the operation center value of the phase comparison by the rotation phase signal when the frequency discrimination detection means detects that the frequency discrimination is outside the range of the frequency discrimination, and the phase comparison detection means When the first state is detected, the phase comparison reference signal is preset to the operation center value by the rotation phase signal after the second detection, and when the phase comparison detection means detects the second state, the phase comparison reference signal is detected. A controller for a rotating body configured to preset the phase comparison reference signal to the operation center value by a subsequent rotation phase signal, and to perform the latch immediately after the presetting of the operation center value. 10. The control device for a rotating body according to claim 9, wherein the phase detecting means is configured to step down the output of the frequency detecting means. 11. The rotation according to claim 9, wherein the phase comparison and detection means has a counting means for stopping counting when the reference signal is counted two times, and the counting means is reset by a rotation phase signal. Body control device. 12. The phase control means forms a preset pulse generation means for generating a preset pulse from a reference signal, a latch pulse from a rotation phase signal, and a pulse preceding the latch pulse in timing to form a phase comparison and detection means. Of the latched pulse generating means for creating the forced operation center pulse extracted by the output of the frequency discriminating means or the output of the frequency discrimination detecting means, and the binary counter for counting the clock pulse, preset the initial value (NP) by the preset pulse and compare the phases. Phase comparator for generating a trapezoidal wave and latching the trapezoidal wave with the latch pulse to obtain a phase error output, and a reference signal generator for decoding a predetermined value of the output of the binary counter to generate the reference signal. And a phase comparison operation center value (NPo) for the phase comparison means by the forced operation center pulse. Rotation of the control device according to paragraph 9 claims, characterized in that a configuration in which preset. 13. The rotating body control device according to claim 12, wherein the phase detecting means is configured to step down the output of the frequency detecting means. 14. The phase comparison / detection means has a counting means for stopping counting when the reference signal is counted two times, and the counting means is reset by a rotation phase signal. The control device for the rotating body according to 1.