JP2000131468A - Electronically controlled mechanical watch and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronically controlled mechanical watch whose speed control responsivity is fast, whose costs can be reduced, and which can restrain a drop in a generated output. SOLUTION: In this electronically controlled mechanical watch, a generator 20 by which mechanical energy transmitted from a power spring via a wheel train is converted into electrical energy is provided, a pointer which is coupled to the wheel train is provided, and a rotation control means 50 which is driven by the electric energy and which controls the rotation cycle of the generator 20 is provided. A switch 23B which can short-circuit both ends of the generator 20 is installed, and a comparison circuit 54 by which the electromotive voltage waveform of the generator 20 is compared with the phase of a reference signal waveform is installed. A chopper signal in a duty ratio which is set according to the phase difference of every waveform is applied to the switch over one cycle of a reference signal, and the generator 20 is chopped and controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for converting the mechanical energy of a mechanical energy source such as a mainspring into electric energy by a generator, operating a rotation control device by the electric energy, and rotating the generator in a cycle. The present invention relates to an electronically controlled mechanical timepiece that accurately drives a pointer fixed to a wheel train by controlling the time, and a control method therefor.

[0002]

2. Description of the Related Art A mechanical energy generated when a mainspring is opened is converted into electric energy by a generator, and a rotation control device is operated by the electric energy to control a current value flowing through a coil of the generator. An electronically controlled mechanical timepiece that accurately drives the hands fixed to a row and displays the time accurately is disclosed in Japanese Patent Publication No. Hei 7-119812 and Japanese Unexamined Patent Application Publication No.
What is described in 50186 gazette is known.

[0003] Japanese Patent Publication No. Hei 7-119812 discloses an angle range in which the brake is turned off and the rotation speed of the rotor is increased to increase the power generation amount during one rotation of the rotor, that is, every period of the reference signal. An angle range in which the brake is applied and turned at a low speed is provided, and the speed is adjusted so as to compensate for a decrease in the generated power during braking while improving the generated power while the rotation speed is high.

[0004] Japanese Patent Application Laid-Open No. 8-50186 discloses a technique in which a reference pulse and a measurement pulse detected with the rotation of a rotor are counted, and the number of reference pulses is compared with the number of measurement pulses. In the first state in which the number of reference pulses is smaller than the number of measurement pulses, the control means generates a brake signal having a pulse width set in response to the measurement pulse to perform brake control.

[0005]

However, the motor described in Japanese Patent Publication No. Hei 7-119812 has one rotor.
During the rotation, it is necessary to switch between a high rotation speed state and a low speed state that is close to the stopped state with the brake applied, and such a rapid change in speed is difficult to realize in practice. There is. In particular, since the rotor is usually provided with a flywheel to improve rotational stability,
There is a problem that it is difficult to make a rapid change in speed.

In addition, since the brake ON control and the brake OFF control are always performed during one rotation of the rotor, that is, for each reference signal, each reference is used especially when the generator starts up or when the control is greatly deviated. There is a problem in that the rotation control amount of the rotor for each signal cannot be so large, it takes time to shift to a normal control state, and the response is low.

[0007] Also, the brake signal generated in response to the measurement pulse has a constant pulse width, so that the reference signal is used even when the control is greatly deviated. However, there is a problem that the brake amount remains constant, it takes time to shift to the normal control state, and the responsiveness is low.

In addition to the circuit for detecting the first and second states by counting and comparing the reference pulse and the measurement pulse, a control for generating a brake signal having a pulse width set in response to the measurement pulse It is necessary to separately provide means, and there is a problem that the configuration is complicated and the cost is high.

Further, since the generated power decreases at the portion where the brake is applied, there is a limit in suppressing the decrease in the generated power while increasing the brake torque.

It is an object of the present invention to provide an electronically controlled mechanical timepiece that has a fast response to speed control, can reduce cost, and can suppress a decrease in generated power.

[0011]

According to a first aspect of the present invention, an electric energy is generated by generating an induced power by being driven by a mechanical energy source and the mechanical energy source connected via a train wheel. An electronically controlled mechanical timepiece comprising: a generator for supplying a power supply; a pointer coupled to the wheel train; and a rotation control device driven by the electric energy to control a rotation cycle of the generator. The control device is
A switch that can short-circuit both ends of the generator, a comparison circuit that compares the phase of the electromotive voltage waveform of the generator with a reference signal waveform that is a time standard, and can generate two or more types of chopper signals having different duty ratios And among these chopper signals, a chopper signal having a duty ratio set based on a signal from the comparison circuit is set to one of the reference signals.
And a braking control circuit capable of choppering the generator in addition to the switch over a period of a cycle.

In the electronically controlled mechanical timepiece of the present invention, the hands and the generator are driven by a mainspring, and the rotation of the generator, ie, the hands, is regulated by applying a brake to the generator by a rotation control device.

At this time, the rotation control (brake control) of the generator is performed by turning on and off a switch capable of short-circuiting both ends of the coil of the generator and choppering. By choppering, when the switch is turned on,
A short brake is applied to the generator, and energy is accumulated in the generator coil. On the other hand, when the switch is turned off, the generator operates, and the energy accumulated in the coil is included, so that the electromotive voltage increases. For this reason, if the generator is controlled by choppering, the decrease in power generated during braking can be compensated for by the increase in the electromotive force when the switch is turned off. The torque can be increased and an electronically controlled mechanical timepiece having a long duration can be constructed.

In the present invention, a chopper signal having a duty ratio set based on a signal from a comparison circuit is applied from two or more types of chopper signals having different duty ratios, that is, an electromotive voltage waveform is generated. If the phase is ahead of the phase of the reference signal waveform, one of the reference signals
A braking amount is increased over a period of a cycle (a duty ratio is large and a switch is on for a long time). A chopper signal is applied to the switch to increase the braking torque of the generator. On the other hand, when the phase of the electromotive voltage waveform lags behind the phase of the reference signal waveform, the brake amount decreases over a period of one cycle of the reference signal (when the duty ratio is small and the switch is on). (Short) chopper signal is applied to the switch to reduce the braking torque of the generator. In this manner, even when a chopper signal having a duty ratio set based on the phase difference between the waveforms immediately before the reference signal is applied to the switch over one period of each reference signal, the rotor of the generator remains in the inertia plate. (Flywheel) or by giving the rotor its own mass, rotation stability is ensured.
The speed does not become low (or stop), and the rotational speed of the rotor can be adjusted without any problem.

For this reason, when the rotation speed continues to be higher than the reference signal, that is, when the torque of the mechanical energy source such as the mainspring is large and the generator is rotating, the rotation speed is increased. The brake is continuously applied until there is no difference between the control signal and the reference signal. Therefore, the speed can be quickly adjusted to a normal rotation speed, and control with high responsiveness can be performed.

Further, since the brake control is performed only by comparing the phases of the electromotive voltage waveform and the reference signal waveform, the configuration of the rotation control device is simplified and the cost can be reduced. In addition, in the brake control, the brake control is performed using the chopper signal having the same duty ratio over one cycle of the reference signal, and the control for applying the brake during one cycle of the reference cycle as in the related art is released. Stable control can be performed and the configuration of the rotation control device can be further simplified as compared with the case where both controls are performed.

The chopper ring frequency at which the switch is turned on and off by the rotation control device is preferably at least five times the electromotive voltage waveform generated by the rotor of the generator at the set speed. More preferably, it is 100 times to 100 times.

If the choppering frequency is smaller than five times the electromotive voltage waveform, the effect of increasing the electromotive voltage is reduced. Therefore, it is preferable that the chopper ring frequency is five times or more the electromotive voltage waveform.

Further, when the choppering frequency becomes 100 times or more of the electromotive voltage waveform, I choppering is performed.
Since the power consumption of C increases and the amount of generated power increases,
The choppering frequency is preferably 100 times or less of the electromotive voltage waveform. Furthermore, if the choppering frequency is 5 to 100 times the electromotive force waveform, the rate of change in torque with respect to the rate of change in duty cycle is close to constant,
Control becomes easy. However, depending on the application and control method,
Set the chopper ring frequency to 5 times or less,
It may be set to more than twice.

An electronically controlled mechanical timepiece according to claim 2 is
The comparison circuit detects whether the phase of the electromotive voltage waveform is advanced or delayed with respect to the phase of the reference signal waveform, and at least the phase of the electromotive voltage waveform is advanced with respect to the phase of the reference signal waveform. If the phase of the electromotive voltage waveform is advanced at least with respect to the phase of the reference signal waveform, the brake control circuit is configured to detect the advance amount if the advance amount is detected. The invention is characterized in that a chopper signal having a duty ratio is applied to the switch.

The comparator detects not only whether the phase of the electromotive voltage waveform is advanced or delayed with respect to the phase of the reference signal waveform, but also detects the amount of advance, and generates a chopper signal having a duty ratio corresponding to the amount of advance. By adding to the switch, the brake amount according to the advance amount can be set, and the rotation speed of the generator can be effectively controlled.

At this time, the braking control circuit operates the switch during a period of one cycle of the chopper signal having a larger duty ratio as the lead amount of the electromotive voltage waveform with respect to the phase of the reference signal waveform increases, that is, one cycle of the reference signal. A chopper signal having a large ratio of a signal of a connected level (for example, an H-level signal when the switch is an Nch transistor and a gate thereof receives a chopper signal) may be added to the switch.

An electronically controlled mechanical timepiece according to claim 4 is
A mechanical energy source, a generator driven by the mechanical energy source coupled via the train wheel to generate induced power and provide electrical energy, a pointer coupled to the train wheel, A rotation control device driven by electric energy to control a rotation cycle of the generator, wherein the rotation control device includes: a switch capable of short-circuiting both ends of the generator; A comparison circuit for comparing the phase of the electromotive voltage waveform of the machine with the phase of a reference signal waveform serving as a time standard; and two or more types of chopper signals having different frequencies can be generated, and from among these chopper signals, A chopper signal having a frequency set based on the signal is applied to the switch over a period of one cycle of the reference signal, and a braking control circuit capable of choppering the generator is controlled. When, it is characterized in that it has a.

When the frequency of the chopper signal applied to the switch is high, the driving torque (braking torque) decreases, the braking effect decreases, and the charging voltage (generation voltage) increases. On the other hand, when a low-frequency chopper signal is applied, the driving torque increases, the braking effect increases, and the charging voltage decreases as compared with the case where the frequency is high. However, since choppering is performed, the charging voltage is higher than when only brake control is performed.

Therefore, when the phase of the electromotive voltage waveform is ahead of the phase of the reference signal waveform and it is necessary to apply a brake, the braking torque of the generator can be increased by applying a low frequency chopper signal. In addition, a decrease in generated power can be suppressed by choppering.

On the other hand, when the phase of the electromotive voltage waveform lags behind the phase of the reference signal waveform, the braking torque of the generator is greatly reduced by applying a chopper signal having a frequency higher than that of the chopper signal to the switch. It is possible to reduce the size and to obtain sufficient generated power.

By applying a brake using a low-frequency chopper signal or releasing a brake using a high-frequency chopper signal as described above, it is possible to increase the brake torque while suppressing a decrease in generated power, and to increase the duration time. Long electronically controlled mechanical watches can be constructed. In addition, since the chopper signal set for one cycle of the reference cycle is applied to the switch, it is possible to continuously apply a low-frequency chopper signal or a high-frequency chopper signal. The speed can be adjusted to an appropriate rotational speed, and control with high responsiveness can be performed.

Further, since the brake control is performed only by comparing the phases of the electromotive voltage waveform and the reference signal waveform, the configuration of the rotation control device can be simplified and the cost can be reduced. In addition, in the brake control, the brake control is performed using the chopper signal having the same frequency over one cycle of the reference signal, and the control for applying the brake and the control for releasing the brake during one cycle of the reference cycle as in the related art are performed. As compared with the case where both are performed, stable control can be performed, and the configuration of the rotation control device can be further simplified.

An electronically controlled mechanical timepiece according to claim 5 is
The comparison circuit detects whether the phase of the electromotive voltage waveform is advanced or delayed with respect to the phase of the reference signal waveform, and at least the phase of the electromotive voltage waveform is advanced with respect to the phase of the reference signal waveform. If the phase of the electromotive voltage waveform is advanced at least with respect to the phase of the reference signal waveform, the brake control circuit is configured to detect the advance amount if the advance amount is detected. It is characterized in that a chopper signal of a frequency is applied to the switch.

The comparator detects not only whether the phase of the electromotive voltage waveform is advanced or delayed with respect to the phase of the reference signal waveform, but also detects the amount of advance, and outputs a chopper signal having a frequency corresponding to the amount of advance to the switch. In addition, the amount of braking can be set according to the amount of advance, and the rotation speed of the generator can be effectively controlled.

At this time, the braking control circuit may apply a chopper signal having a lower frequency to the switch as the amount of advance of the phase of the electromotive voltage waveform with respect to the phase of the reference signal waveform increases.

Furthermore, choppering control may be performed using chopper signals having different duty ratios as well as frequencies. In particular, when increasing the braking torque, a chopper signal with a low frequency and a high duty ratio is used, and when reducing the braking torque, a chopper signal with a high frequency and a small duty ratio is used to efficiently control the brake. It can be carried out.

The control method of the electronically controlled mechanical timepiece according to the present invention supplies electric energy by generating induced electric power by being driven by a mechanical energy source and the mechanical energy source connected via a wheel train. An electronically controlled mechanical timepiece comprising: a power generator, a pointer coupled to the wheel train, and rotation control means driven by the electric energy to control a rotation cycle of the power generator. Compare the phase of the electromotive voltage waveform of the generator and the phase of the reference signal waveform as a time standard, and switch the terminals of the generator to a switch capable of short-circuiting the phase difference from two or more types of chopper signals having different duty ratios. The switch is turned on and off by adding a chopper signal having a duty ratio set accordingly, and the generator is brake-controlled by chopper ring.

According to a ninth aspect of the present invention, there is provided a method for controlling an electronically controlled mechanical timepiece, wherein the induced time is generated by being driven by a mechanical energy source and the mechanical energy source connected via a train wheel. Control of an electronically controlled mechanical timepiece comprising: a generator for supplying electrical energy; a pointer coupled to the wheel train; and rotation control means driven by the electrical energy to control a rotation cycle of the generator. In the method,
The phase of the generator electromotive voltage waveform is compared with the phase of a reference signal waveform serving as a time standard, and a switch capable of short-circuiting each terminal of the generator is connected to a switch capable of short-circuiting two or more types of chopper signals having different frequencies. The chopper signal of the frequency set according to the above is added and the switch is turned on and off, and the generator is brake-controlled by the chopper ring.

At this time, the two or more types of chopper signals having different frequencies may have different duty ratios.

According to these control methods, since the rotation control (brake control) of the generator is performed by turning on and off a switch capable of short-circuiting both ends of the coil of the generator, choppering is performed. The braking torque can be increased while suppressing the decrease in the time, and an electronically controlled mechanical timepiece having a long duration can be obtained. Also, since the chopper signal set over one cycle of the reference cycle is applied to the switch,
The speed can be quickly adjusted to a normal rotation speed, control can be performed with high responsiveness, and both control for applying a brake and control for releasing during one cycle of a reference cycle can be performed as in the related art. As compared with the case, stable control can be performed, and the configuration of the rotation control device can be simplified. Furthermore, since the brake control is performed only by comparing the phases of the electromotive voltage waveform and the reference signal waveform, the configuration of the rotation control device can be further simplified and the cost can be reduced.

[0037]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a main part of an electronically controlled mechanical timepiece according to a first embodiment of the present invention, and FIGS. 2 and 3 are sectional views thereof.

The electronically controlled mechanical timepiece includes a barrel wheel 1 comprising a mainspring 1a as a mechanical energy source, a barrel gear 1b, a barrel barrel 1c, and a barrel lid 1d. Mainspring 1a
The outer end is fixed to the barrel gear 1b and the inner end is fixed to the barrel barrel 1c. The barrel case 1c is supported by the main plate 2 and the train wheel bridge 3, and is fixed by a square hole screw 5 so as to rotate integrally with the square hole wheel 4.

The square wheel 4 is meshed with the hammer 6 so as to rotate clockwise but not counterclockwise. The method of rotating the hour wheel 4 in the clockwise direction and winding the mainspring 1a is the same as the automatic winding or the manual winding mechanism of the mechanical timepiece, and thus the description is omitted.

The rotation of the barrel gear 1b is increased by a factor of 7 to the second wheel & pinion 7, and is sequentially increased by 6.4 times to the third wheel & pinion 8.
Increased 5 times to 4th car 9 Increased 3 times to 5th car 10
The speed is increased by a factor of 10 to the sixth wheel 11 and to the rotor 12 by a factor of 10 and is increased by a total of 126,000 times via the wheel train.

The second wheel & pinion 7 is fixed with a cannon pinion 7a, the cannon pinion 7a with a minute hand 13 and the fourth wheel 9 with a second hand 14 respectively. Therefore, to rotate the second wheel & pinion 7 at 1 rpm and the fourth wheel & pinion 9 at 1 rpm, the rotor 12 must rotate at 5 rpm.
What is necessary is just to control so that it may rotate. At this time, the barrel gear 1b becomes 1/7 rph.

This electronically controlled mechanical timepiece has a rotor 12,
A generator 20 including a stator 15 and a coil block 16 is provided. The rotor 12 has a rotor magnet 12
a, a rotor pinion 12b, and a rotor inertia disk 12c. The rotor inertia disk 12 c is for reducing the fluctuation of the rotation speed of the rotor 12 with respect to the fluctuation of the driving torque from the barrel car 1. The stator 15 includes a stator body 15a.
Is wound with a 40,000 turn stator coil 15b.

The coil block 16 is provided with
The coil 16b of 10,000 turns is wound. Here, the stator body 15a and the magnetic core 16a are made of PC permalloy or the like. Further, the stator coil 15b and the coil 16b are connected in series so that an output voltage is obtained by adding the respective generated voltages.

Next, a control circuit of the electronically controlled mechanical timepiece will be described with reference to FIGS.

FIG. 4 is a block diagram showing the functions of the present embodiment.

The AC output from the generator 20 is a step-up rectifier,
The voltage is boosted and rectified through a rectifying circuit 21 including full-wave rectification, half-wave rectification, transistor rectification, and the like. The rectifier circuit 21 is connected to a control IC such as a rotation control device and a load 22 such as a crystal oscillator. In FIG. 4, for convenience of explanation,
Each functional circuit configured in the IC is described separately from the load 22.

The generator 20 includes a braking resistor 23A and an Nch or Pch transistor 2 functioning as a switch.
A brake circuit 23 configured by connecting 3B in series is connected. The generator 20 and the brake circuit 2
3 constitutes a VCO (voltage controlled oscillator) 25. Note that a diode may be appropriately inserted into the brake circuit 23 in addition to the braking resistor 23A.

A rotation control device 50 is connected to the VCO 25.

The rotation control device 50 includes an oscillation circuit 51, a frequency dividing circuit 52, a rotation detection circuit 53 of the rotor 12, a phase comparison circuit (PC) 54, a low-pass filter (low-pass filter: L
PF) 55, a brake control circuit 56 which is a brake control circuit
It is constituted by.

The oscillating circuit 51 outputs an oscillating signal from the crystal oscillator 51A, and the oscillating signal is frequency-divided by a frequency dividing circuit 52 up to a certain period. The frequency-divided signal is output to the phase comparison circuit 54 as a time standard signal (reference signal waveform) fs of, for example, 10 Hz. Note that the quartz oscillator 5
A reference signal may be created using various reference standard vibration sources or the like instead of 1A.

The rotation detecting circuit 53 receives the output waveform of the VCO 25 with high impedance so as not to affect the generator 20 side, processes this output into a rectangular pulse fr, and outputs it to the phase comparing circuit 54.

The phase comparison circuit 54 includes a time standard signal (reference signal waveform) fs from the frequency dividing circuit 52 and the rotation detecting circuit 5.
The phase is compared with the rectangular wave pulse (electromotive voltage waveform) fr from No. 3 and a difference signal is output. This difference signal is the LPF 55
After the high-frequency component is removed by the above, the signal is input to the brake control circuit 56.

The brake control circuit 56 inputs a control signal of the brake circuit 23 to the VCO 25 based on this signal. Thereby, phase synchronization control (PLL control) is realized.

Next, a more specific configuration of this embodiment is shown in FIG.

As shown in the figure, in the present embodiment, a chopper charging circuit 60 is used as the brake circuit 23.
The chopper charging circuit 60 includes, as shown in FIG.
0, the two comparators 61 and 62 connected to the coils 15b and 16b, a power supply 63 for supplying a comparison reference voltage Vref to the comparators 61 and 62, the outputs of the comparators 61 and 62, and the brake control circuit 56 OR circuits 64 and 65 for outputting a logical sum with a clock output (control signal) from the OR and the coils 15b and 16b, and the outputs of the OR circuits 64 and 65 are connected to gates to function as switches. Field effect transistors 66 and 67 (FET) and the coils 15b and 16
b, and diodes 68 and 69 connected to a capacitor 21a provided in the rectifier circuit 21. The FETs 66 and 67 are provided with parasitic diodes 66A and 67A.

The positive side (the first power supply line side) of the capacitor 21a is set to the voltage VDD, and the negative side (the second power supply line side) is VTKN (V / TANK / Negativ:-of the battery).
Side). Similarly, the negative side of the power supply 63 and the source sides of the transistors 66 and 67 are also set to VTKN (second power supply line side). Therefore, this chopper charging circuit 6
0, the generators 20 are once short-circuited to the VTKN side by controlling the transistors 66 and 67, and VDD is
The voltage of the chopper is boosted so as to be equal to or higher than the voltage. For this reason, the comparators 61 and 62 output the boosted electromotive voltage and
An arbitrary set voltage Vref between VDD and VTKN is compared.

In the chopper charging circuit 60, the outputs of the comparators 61 and 62 are also output to the waveform shaping circuit 70. Therefore, the rotation detection circuit 53 is constituted by the chopper charging circuit 60 and the waveform shaping circuit 70.

The waveform shaping circuit 70 is a monostable multivibrator (one-shot type) 71 composed of a capacitor 72 and a resistor 73 as shown in FIG.
Alternatively, a type using a counter 74 and a latch 75 as shown in FIG. 8 can be used.

The phase comparator 54 comprises an analog phase comparator, a digital phase comparator, etc.
A CMOS type phase comparator using OSIC can be used. Then, the 10 Hz time standard signal fs from the frequency dividing circuit 52 and the rectangular wave pulse fr from the waveform shaping circuit 70
Is detected and a difference signal is output.

This difference signal is supplied to a charge pump (CP) 8
It is input to 0 and converted to a voltage level, and a high frequency component is removed by a loop filter 81 including a resistor 82 and a capacitor 83. Therefore, the LPF 55 is constituted by the charge pump 80 and the loop filter 81.

The level signal a output from the loop filter 81 is input to the comparator 90. The signal from the oscillation circuit 51 is supplied to the comparator 90 at 50 Hz to 50 Hz.
A triangular wave signal b converted through a frequency dividing circuit 91 for dividing the frequency to 10 KHz and a triangular wave generating circuit 92 using an integrator and the like is input. The comparator 90 outputs a rectangular wave pulse signal c from the level signal a from the loop filter 81 and the triangular wave signal b. Therefore, the brake control circuit 56 is composed of the comparator 90, the frequency dividing circuit 91, and the triangular wave generating circuit 92.

The rectangular wave pulse signal c output from the comparator 90 is input to the chopper charging circuit 60 as the clock signal CLK as described above.

Next, the operation of this embodiment will be described with reference to FIGS.
This will be described with reference to the waveform chart of FIG. 10 and the flowchart of FIG.

The rotor 1 of the generator 20 is driven by the mainspring 1a.
When 2 rotates, each coil 15b, 16b outputs an AC waveform corresponding to a change in magnetic flux. This waveform is input to each of the comparators 61 and 62. Then, each of the comparators 61 and 62 compares the voltage with the reference voltage Vref from the power supply 63. The timing of the polarity for turning on the transistors 66 and 67 is detected by comparison between the comparators 61 and 62.

That is, in order to perform the step-up charging of the capacitor 21a and the chopper brake operation of the generator 20,
The operation can be performed only by inputting the clock signal CLK to the gates of the transistors 66 and 67. However, in the case of controlling only by the clock signal, when the clock signal becomes Hi, the transistors 66 and 67 are simultaneously turned on and short-circuited, and when the clock signal becomes Lo, the respective parasitic diodes 66A and 67A
And one of the diodes 68 and 69 to charge the capacitor 21a. Specifically, when AG1 is +, charging is performed from the parasitic diode 67A to the diode 68 through the coils 15b and 16b, and when AG2 is +, the parasitic diode 66A is charged to the diode 69 through the coils 15b and 16b. Charge.

In this case, two diodes are connected in series in the charging path, and a voltage drop corresponding to the rise voltage VF of each diode is generated. Therefore, the capacitor 21a cannot be charged unless the charging voltage is higher than the voltage obtained by adding the voltage drop to the potential of the capacitor 21a. This is a major factor in reducing the charging efficiency in the case of a generator with a small generated voltage, such as an electronically controlled mechanical timepiece.

Therefore, in this embodiment, the transistor 6
The charging efficiency is improved by adjusting the timing without turning ON and OFF the switches 6 and 67 at the same time.

That is, when AG1 becomes positive when viewed from VTKN and exceeds the voltage Vref, the comparator 62 outputs a Hi level signal. Therefore, the OR circuit 65 continues to output a Hi level signal regardless of the clock signal CLK. As a result, a voltage is applied to the gate of the transistor 67, and the transistor 67 is turned on.

On the other hand, since the comparator 61 is connected to the AG2 side, since AG2 <voltage Vref, the comparator 61 outputs the Lo level signal, the OR circuit 64 outputs a signal synchronized with the clock signal, and the transistor 66 turns ON / OFF. The OFF operation is repeated, and the AG1 terminal is boosted by the chopper.

At this time, the charging path is the transistor 66
Is once turned on and off, AG1-diode 68-capacitor 21a-VTKN-transistor 67
(From source to drain) -AG2, and the parasitic diode 67A goes off the path, so that the voltage drop is reduced and the charging efficiency is improved.

Note that the level of the voltage Vref is
It is preferable to select an electromotive voltage level at which the capacitor 21a can be charged by boosting the generated voltage by chopper. Usually, VTKN may be set to a level exceeding several hundred mV. If the set level of the voltage Vref is high, the period until the comparators 61 and 62 operate becomes longer. During this period, the above-mentioned two diodes are connected in series, and the power generation efficiency is reduced accordingly.

When the transistor 66 is turned on, since the transistor 67 is also turned on, the generator 20 is short-circuited, the short brake is applied, and the power generation amount is reduced accordingly. With this configuration, when the transistor 66 is opened, the voltage can be boosted to VDD or more. If the cycle of choppering to be turned ON / OFF is set to a predetermined period or more, it is possible to compensate for a decrease in the amount of power generated during short brake, and to reduce the generated power. The braking torque can be increased while maintaining the braking torque at or above a certain level.

When the output from the generator 20 is on the AG2 side, the same operation as described above is performed, except that the operations of the comparators 61 and 62 and the transistors 66 and 67 are switched.

The outputs of the comparators 61 and 62 of the chopper charging circuit 60 are input to the waveform shaping circuit 70 and converted into a rectangular pulse fr. That is, the rotation detection circuit 53 including the chopper charging circuit 60 and the waveform shaping circuit 70 detects the rotation of the rotor 12 and outputs it as a rectangular wave pulse fr (Step 1, hereinafter, step is abbreviated as “S”).

For example, the monostable multivibrator 71 of FIG. 7 shapes the waveform based on only one polarity detection (the output of the comparator 62). Specifically, the comparator 6
2 at the rise of the output, the monostable multivibrator 7
Trigger 1 and output a pulse of the length set by CR. Since the time constant of CR is set to about 1.5 times or more with respect to one cycle of the clock signal CLK, the next rising of the output of the comparator 62 is input within the pulse time set by CR, and The stable multivibrator 71 is retriggered. For this reason, the multivibrator 71 outputs the comparator 6 within 1.5T time set by CR.
The Hi level signal is continuously output until the rising of the output of No. 2 does not occur, whereby the rectangular wave pulse fr corresponding to the output signal of the generator 20 is output. However, the fall time of the pulse fr is delayed by the CR setting time−the Hi-level time of the pole detection pulse, and as shown in FIG.
When the CR is 1.5T, a delay occurs by 1.5T-0.5T = 1T.

On the other hand, the waveform shaping circuit 70 shown in FIG.
The waveform is shaped based on only one polarity detection (one output of the comparator 61 or 62). Specifically, the counter 7 counts and clears the clock signal for 2T time.
4 and latch means 75 for latching with the output of the counter 74.
Is set to be cleared by the output of either the comparator 61 or 62. For example, as shown in FIG. 9, when the output of the comparator 62 is generated, the latch means 75 and the counter 74 are cleared, and the output fr outputs the Lo level signal. When the output of the comparator 62 stops being generated, the counter 7
4, the output fr is latched at the Hi level.

Then, when the output of the comparator 62 is generated again, the latch signal is cleared, the output fr becomes the Lo level, and a rectangular wave pulse can be obtained. If the output of the comparator 62 occurs within the set time of the counter (2T), the latch operation is not performed. However, also in this case, as shown in FIG.
T), the rise of Hi of the rectangular wave pulse fr is delayed.

Each of the waveform shaping circuits 70 in FIGS. 7 and 8 causes a delay in the output of the comparator 62 to convert the output into a rectangular pulse. This is because the output from the comparator 62 is not always obtained as a signal synchronized with the cycle of the clock signal at the time of starting the system or the like, and becomes an output like a so-called pulse omission. This is to prevent pulse cracking by the CR set time or the counter set time. Note that the CR setting time and the counter time may be set according to the degree of missing pulses, and may be set to a period of about 1.5 to 5T. Note that such a delay hardly affects the control.

The rectangular wave pulse f thus shaped
r is compared with the time standard signal fs of the frequency dividing circuit 52 in the phase comparing circuit 54 (S2), and the difference signal is converted into the level signal a through the charge pump 80 and the loop filter 81.

The comparator 90 outputs a rectangular wave pulse signal c based on the level signal a and the triangular wave signal b from the triangular wave generating circuit 92, as shown in FIG. The level signal a is lower than the standard level when the phase of the rectangular wave pulse fr based on the rotation of the rotor 12 is ahead of the phase of the time standard signal fs, and is higher when the phase is delayed. Is set to

For this reason, when the phase of the rectangular wave pulse fr is ahead of the time standard signal fs (S3), the state of the H level of the rectangular wave pulse signal c becomes longer.
The short brake time in each chopper cycle in the chopper charging circuit 60 becomes longer, the braking amount increases, and the rotor 12 of the generator 20 is decelerated (S4). Conversely, when the phase of the rectangular wave pulse fr is behind the time standard signal fs, the state of the rectangular wave pulse signal c at the L level becomes longer, and accordingly, in each chopper cycle in the chopper charging circuit 60, , The braking amount is reduced and the rotor 12 of the generator 20 is accelerated (S5).

That is, the duty ratio, which is the ratio of the H level period in one cycle of the rectangular pulse signal c, is set by the level signal a output based on the signal from the phase comparison circuit 54. The above-described brake control, that is, the rectangular wave pulse signal c whose duty ratio is varied in accordance with the phase difference between the rectangular wave pulse (electromotive voltage waveform) fr and the time standard signal (reference signal waveform) fs is charged by the brake circuit 23 to the chopper. By input to the circuit 60, the rectangular wave pulse fr is controlled to match the time standard signal fs.

The relationship between the reference period signal fs in FIGS. 4 and 5, the rectangular pulse fr from each waveform shaping circuit 70, and the output signal (rectangular pulse signal) c of the comparator 90 is shown in a timing chart. It looks like 12. In other words, the output signal c of the comparator 90 indicates that the short brake period becomes longer and the braking amount increases in accordance with the phase difference between the immediately preceding reference cycle signal fs and the rectangular wave pulse fr, or the short brake period becomes shorter and the brake signal becomes shorter. The amount has been reduced.

That is, as shown in FIG. 12, the phase difference S between the rectangular wave pulse fr and the reference period signal fs in the period immediately before the periods T1, T2 and T3 of the reference period signal fs.
Comparing 1, S2, and S3, the immediately preceding phase difference S1 is relatively large in the cycle T1, and the phase of the rectangular wave pulse fr corresponding to the rotation of the generator 20 is advanced compared to the reference cycle signal fs. The output signal c of the comparator 90 is a chopper signal whose H level period is larger than that of the L level, that is, a chopper signal having a relatively large duty ratio and a relatively large brake amount.

In the period T2, the immediately preceding phase difference S2 is smaller than the phase difference S1, so that the output signal c in the period T2 has a shorter H-level period than the output signal c in the period T1. The chopper signal has a small duty ratio and a small brake amount.

Further, in the cycle T3, the immediately preceding phase difference S3
Is smaller than the phase difference S2, the output signal c in the cycle T3 has a shorter H-level period than the output signal c in the cycle T2, that is, the duty ratio is smaller and the brake amount is smaller. Chopper signal.

These output signals c have waveforms having the same duty ratio over one cycle of the reference cycle signal fs, that is, waveforms having the same short brake period. In the present embodiment, the brake is applied when the output signal c is at the high level, that is, the brake period is at the high level.

According to the present embodiment, the following effects can be obtained.

(1) Over a period of one cycle of the reference signal, a chopper signal c having a duty ratio set based on the phase differences S1 to S3 of the waveforms immediately before the reference signal is applied to the switch, and Since the rotational speed is regulated, if the phase of the electromotive voltage waveform fr based on the rotational speed continues to be ahead of the reference signal waveform fs, that is, the torque of the mechanical energy source such as the mainspring 1a Is large and the generator 20 is rotating, the brake is continuously applied until the phase difference between the waveforms disappears, so that the speed can be quickly adjusted to the normal rotation speed, and the responsiveness can be improved. Fast control can be performed.

(2) Further, the duty ratio of the chopper signal (rectangular wave pulse signal) c is automatically set based on the level signal a, that is, the phase difference between the signal waveforms fr and fs detected by the phase comparator 54. Therefore, the brake can be applied with an appropriate brake amount corresponding to the phase difference, so that control with even faster response can be performed.

(3) The rotor 12 of the generator 20 is provided with an inertial disk (flywheel) 12c or has a mass to the rotor 12 itself to ensure rotational stability. Even if the brake control is performed over one cycle, the rotation speed of the rotor 12 does not instantaneously increase or decrease (or stops), and the rotation speed control of the rotor 12 can be performed without any problem.

In this embodiment, the brake control is performed by using the chopper signal having the same duty ratio over one cycle of the reference signal. As compared with the case of performing both of the control for canceling the control, stable control can be performed, and the configuration of the rotation control device 50 can be simplified.

Further, since the brake control is performed only by comparing the phases of the electromotive voltage waveform and the reference signal waveform, the configuration of the rotation control device 50 can be further simplified, and the cost can be reduced.

(4) Since the VCO 25 including the generator 20 and the brake circuit 23, and the phase comparison circuit 54 and the brake control circuit 56 are provided, the rotation of the generator 20 can be controlled by PLL control. For this reason, since the braking level in the brake circuit 23 can be set by comparing the power generation waveforms for each cycle, once the power generation waveform is once pulled into the lock range, the response is fast and stable unless the power generation waveform fluctuates greatly immediately. Control can be performed.

(5) Since the brake circuit 23 is constituted by the chopper charging circuit 60 and the brake control is realized by using the chopper ring, the braking torque can be increased while keeping the generated power at or above a certain level. Therefore, efficient brake control can be performed while maintaining the stability of the system, and the duration of the electronically controlled mechanical timepiece can be made longer than before.

(6) By using the chopper charging circuit 60, not only the brake control but also the charging of the capacitor 21a of the rectifier circuit 21 (power generation processing) and the detection of the rotation of the rotor 12 of the generator 20 are performed by the chopper charging. The circuit can be realized by the circuit 60, and the circuit configuration can be simplified, the number of parts can be reduced, the cost can be reduced, and the manufacturing efficiency can be improved as compared with the case where each of these functions is realized by a separate circuit. Can be.

(7) In the chopper charging circuit 60, the on / off control timing of each of the transistors 66 and 67 is adjusted, and one of the transistors 66 and 67 is kept on and the other is on and off. Therefore, the voltage drop in the charging path can be reduced, and the power generation efficiency can be improved. For this reason, especially like an electronically controlled mechanical watch,
When a small generator 20 must be used, the power generation efficiency can be improved, which is very effective.

(8) Since the waveform shaping circuit 70 is provided, if the circuit configuration of the chopper charging circuit 60 and the like is changed, the VCO
Even when the output waveforms from 25 are different, the different portion of the output waveform can be absorbed by the waveform shaping circuit 70. For this reason,
Even if the circuit configuration of the chopper charging circuit 60 is different, the rotation control device 50 can be commonly used, and the cost of parts can be reduced.

(9) When a general circuit combining a low-pass filter (LPF) and a comparator is used as the waveform shaping circuit 70, a part of the chopper-boosted electromotive voltage can be removed from a first-order lag CR filter or the like. This causes the LPF to be charged, which causes a reduction in the charging efficiency of the capacitor 21a. However, since each waveform shaping circuit 70 of the present embodiment performs digital processing, current consumption can be suppressed low. The efficiency of charging the capacitor 21a can also be improved.

Next, a second embodiment of the present invention will be described. In the present embodiment, the same or similar components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted or simplified.

FIG. 13 is a block diagram showing an electronically controlled mechanical timepiece according to the second embodiment.

The electronically controlled mechanical timepiece includes a mainspring 1a as a mechanical energy source, a speed increasing train (each of wheels 7 to 11) for transmitting the torque of the mainspring 1a to the generator 20, and a speed increasing train. Hands (minute hand 13, second hand 14) that are connected to display time are provided.

[0104] The generator 20 is driven by the mainspring 1a via the speed increasing wheel train, generates induced electric power, and supplies electric energy. The AC output from the generator 20 is boosted and rectified through a rectification circuit 21 composed of step-up rectification, full-wave rectification, half-wave rectification, transistor rectification, and the like, and is charged and supplied to a power supply circuit 21a composed of a capacitor and the like.

The oscillation circuit 51 includes, as shown in FIG.
An oscillation signal is output using a quartz oscillator 51A, which is a time standard source, and the oscillation signal is frequency-divided by a frequency dividing circuit 52 including 12 flip-flops to a certain fixed period. This frequency-divided signal is output as an 8 Hz reference signal (reference signal waveform) fs.

The rotation detecting circuit 53 includes a waveform shaping circuit 161 connected to the generator 20 and the monomultivibrator 16.
And 2. The waveform shaping circuit 161 includes an amplifier and a comparator, and converts a sine wave into a rectangular wave. The mono-multi vibrator 162 functions as a band-pass filter that passes only pulses of a certain period or less, and a rotation detection signal (electromotive voltage waveform) from which noise has been removed.
FG1 is output.

The rotation detection signal FG 1 of the rotation detection circuit 53 and the reference signal fs from the frequency dividing circuit 52 are
Up / down counter 154 which is a comparison circuit via 0
Are input to the up-count input and the down-count input, respectively.

The synchronization circuit 170 includes four flip-flops 171, an AND gate 172, and a NAND gate 173.
And the output of the fifth stage of the frequency dividing circuit 52 (1024H
z) and the signal of the output of the sixth stage (512 Hz),
The rotation detection signal FG1 is synchronized with the reference signal fs (8 Hz), and an adjustment is made so that these signal pulses are not output overlapping.

The up / down counter 154 is constituted by a 4-bit counter. Up / down counter 1
54, the rotation detection signal FG
1 is input from the synchronization circuit 170, and a signal based on the reference signal fs is input to the down-count input from the synchronization circuit 170. Thereby, the reference signal f
The counting of s and the rotation detection signal FG1 and the calculation of the difference can be performed simultaneously.

The up / down counter 154 is provided with four data input terminals A to D. When an H level signal is input to the terminals A to C, the initial value of the up / down counter 154 is changed. Is set to the counter value 7.

Also, the LO of the up / down counter 154
The start setting circuit 190 is connected to the AD input terminal. The startup setting circuit 190 is connected to the capacitor 21a, and when power is first supplied to the capacitor 21a,
Initialization circuit 191 for outputting system reset signal SR
A frequency dividing circuit 192 that is reset by the system reset signal SR and counts that a predetermined number of rotation detection signals FG1 are input;
2 as a clock input, and a flip-flop 193 reset by the system reset signal SR.
It is comprised including.

The initialization circuit 191 is configured to output a system reset signal SR when, for example, the voltage charged in the capacitor 21a reaches a predetermined value lower than a normal value. Further, the frequency dividing circuit 192 is configured by a four-stage flip-flop, and is configured to output an H level signal when the rotation detection signal FG1 is input for 16 pulses. Therefore, when the flip-flop 193 outputs the system reset signal SR and then inputs the rotation detection signal FG1 for 16 pulses, the H-level signal becomes the LOA of the up / down counter 154.
It is set to be input to the D input.

The up / down counter 154 has a LOAD
Up-down input is not accepted until the input goes to the H level, that is, for a certain period after the system reset signal SR is output, so that the counter value of the up-down counter 154 is maintained at “7”.

The up / down counter 154 has 4-bit outputs QA to QD. Therefore, each output QA ~
The QD outputs an L-level signal and an H-level signal as appropriate according to the counter value.

The outputs QA to QD are input to the chopper signal generation circuit 200. Then, the chopper signal generation circuit 200 converts the counter value and the change timing thereof, that is, the chopper signal having a duty ratio set in advance corresponding to the phase difference between the signals, into the reference signal fs as shown in FIG. Is output in synchronization with one cycle of

The output Q of the chopper signal generation circuit 200 is connected to the gate of the Nch transistor 23B of the brake circuit 23 connected in parallel with the generator 20, as shown in FIG. Therefore, when an H level signal is output from the output Q, the Nch transistor 2
A voltage is applied to the gate of 3B, and the transistor 23B becomes O
The N state is maintained, the generator 20 is short-circuited and the brake is applied.

On the other hand, when an L level signal is output from output Q, the gate voltage of transistor 23B decreases,
The transistor 23B is kept in the OFF state, and the
No brake is applied to 0. Therefore, the brake circuit 2
When the ratio of the H level signal is large, that is, a chopper signal having a large duty ratio is added to 3, the braking torque of the generator 20 is increased. The braking torque of the machine 20 is reduced, and the speed of the generator 20 is controlled in the same manner as in the first embodiment.

According to this embodiment, the first
The same effects as (1) to (3), (5) of the embodiment can be obtained,
The following effects are obtained.

(10) As a comparison circuit of the rotation control device 50,
Since the up / down counter 154 is used, each up count signal (UP) and down count signal (DOW
Since the comparison (difference) of each count value can be automatically calculated simultaneously with the count of N), for example, using two counters for counting each signal and a comparator for comparing the output of each counter Compared with the case where the comparison circuit is configured, the configuration can be simplified and the difference between the respective count values can be easily obtained.

(11) 4-bit up / down counter 15
Since 4 is used, 16 count values can be counted. Therefore, the up-count signal (UP)
When the value is continuously input, the input value can be accumulated and counted, and the set value, that is, the up-count signal (UP) and the down-count signal (DOWN) are continuously input and the counter value In the range up to "15" or "0", the accumulated error can be corrected. For this reason, even if the rotation speed of the generator 20 deviates greatly from the reference speed, for example, by appropriately setting the duty ratio of the output Q from the chopper signal generation circuit 200 according to each counter value, the accumulated The rotation speed of the generator 20 can be returned to the reference speed by reliably and efficiently correcting the error, and accurate hand movement can be maintained in the long term.

(12) The generator 2 is provided with the initialization circuit 191.
Since the brake control is not performed and the generator 20 is not braked until the power supply circuit 21a at the time of the start-up of 0 is charged to a predetermined voltage, it is possible to give priority to charging the power supply circuit 21a. As a result, the rotation control device 50 driven by the power supply circuit 21a can be driven quickly and stably, and the stability of the subsequent rotation control can be enhanced.

The present invention is not limited to the above embodiments, but includes modifications and improvements as long as the object of the present invention can be achieved.

For example, in each of the above embodiments, a chopper signal having a different duty ratio according to the phase difference between the waveforms is output to the switch to control the chopper ring of the generator, but as shown in FIG. May be controlled by outputting different chopper signals.

That is, as shown in FIGS. 17 and 18, when the chopper ring frequency is low, the driving torque (braking torque) is reduced.
And the braking amount can be increased.
At this time, as the choppering frequency decreases, the charging voltage also decreases. However, even when the choppering frequency is as low as 25 Hz, the voltage can be maintained at a constant value (0.8 V) or more.
Accordingly, the phase differences S1 to S3 become small, and the reference signal fs
As the amount of phase advance of the rotation detection signal FG1 with respect to the signal c decreases, a chopper signal having a lower frequency may be output. As described above, even when the frequency of the chopper signal is adjusted according to the phase difference between the respective waveforms, the same operation and effect as when the duty ratio of each of the above embodiments is adjusted can be obtained.

Furthermore, if both the frequency and the duty ratio of the chopper signal are adjusted according to the phase difference between the waveforms, the braking torque and the charging voltage can be adjusted more effectively.

Further, the duty ratio and frequency of the chopper signal may be set in advance by selecting several types as in the second embodiment, or may be selected and set as in the first embodiment. May be automatically set in accordance with a signal based on the phase difference from the signal.

In the second embodiment, the 4-bit up / down counter 154 is used as a counter. However, an up / down counter of 3 bits or less may be used, or an up / down counter of 5 bits or more may be used. Is also good. If an up / down counter with a large number of bits is used, the countable value is increased, so that the range in which the accumulated error can be stored can be increased. In particular, control in an unlocked state such as immediately after starting the generator 20 is advantageous. On the other hand, if a counter with a small number of bits is used, the range in which the accumulated error can be stored becomes small. However, in the locked state, up and down are repeated. There is an advantage that can be reduced.

The counter is not limited to the up-down counter, but may be the reference signal fs and the rotation detection signal FG.
The first and second counters may be separately provided for each of them. However, in this case, a comparison circuit for comparing the count values of the respective counters must be separately provided, and using the up / down counter 154 has an advantage that the circuit configuration is simplified.

Although the start setting circuit 190 is not necessarily provided, it is preferable that the start setting circuit 190 be provided since the power generation can be prioritized when the generator 20 is started and the rotation control device 50 can be driven quickly.

Further, it is preferable that two or more types of duty ratios and frequencies of the chopper signal are used when the rotation detection signal is advanced with respect to the reference signal. In the electronically controlled mechanical timepiece, the mainspring 1a is basically set so that the phase of the rotation detection signal advances with respect to the reference signal.
It is preferable that the duty ratio and the frequency of the chopper signal can be set so that the brake amount can be adjusted according to the advance amount.

Therefore, even when the phase of the rotation detection signal lags behind the reference signal, two or more types of duty ratios and frequencies of the chopper signal may be set, but usually the brake amount is the smallest. A chopper signal having such a duty ratio and frequency may be set.

[0132]

As described above, according to the electronically controlled mechanical timepiece of the present invention, the responsiveness of the speed control can be reduced, the cost can be reduced, and the decrease in the generated power can be suppressed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of an electronically controlled mechanical timepiece according to a first embodiment of the invention.

FIG. 2 is a sectional view showing a main part of FIG.

FIG. 3 is a sectional view showing a main part of FIG. 1;

FIG. 4 is a block diagram illustrating functions of the first embodiment.

FIG. 5 is a block diagram showing a configuration of the first embodiment.

FIG. 6 is a circuit diagram illustrating a chopper charging circuit according to the first embodiment.

FIG. 7 is a diagram illustrating an example of a waveform shaping circuit according to the first embodiment.

FIG. 8 is a diagram illustrating another example of the waveform shaping circuit according to the first embodiment.

FIG. 9 is a waveform chart in the circuit of the first embodiment.

FIG. 10 is a diagram illustrating a process of a comparator of the brake control circuit according to the first embodiment.

FIG. 11 is a flowchart illustrating a control method according to the first embodiment.

FIG. 12 is a timing chart in the first embodiment.

FIG. 13 is a block diagram showing a configuration of a main part of an electronically controlled mechanical timepiece according to a second embodiment of the invention.

FIG. 14 is a circuit diagram showing a configuration of an electronically controlled mechanical timepiece according to a second embodiment.

FIG. 15 is a timing chart of a chopper signal in the second embodiment.

FIG. 16 is a timing chart of a chopper signal according to a modification of the present invention.

FIG. 17 is a graph showing the relationship between choppering frequency and charging voltage in the present invention.

FIG. 18 is a graph showing a relationship between a chopper ring frequency and a braking torque in the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 barrel wheel 1a mainspring serving as a mechanical energy source 1b barrel wheel 2 main plate 3 wheel train receiver 7 second wheel 8 third wheel 9 fourth wheel 10 fifth wheel 11 sixth wheel 12 rotor 12a rotor magnet 12c rotor inertia disk 13 minute hand 14 second hand 20 Generator 21 Rectifier circuit 21a Capacitor (power supply circuit) 23 Brake circuit 23B Transistor which is a switch 50 Rotation control device 51 Oscillation circuit 51A Crystal oscillator 52 Frequency divider circuit 53 Rotation detection circuit 54 Phase comparison circuit 56 Brake control Brake control circuit as a circuit 60 Chopper charging circuit 66, 67 Field effect transistor 70 Waveform shaping circuit 80 Charge pump 90 Comparator 91 Divider circuit 92 Triangular wave generation circuit 120 Brake circuit 126 Field effect transistor 127 Field effect transistor 154 Up Down counter 170 synchronization circuit 190 starts setting circuit 191 initializes the circuit 200 is a brake control circuit chopper signal generating circuit

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hidenori Nakamura 3-5-5 Yamato, Suwa-shi, Nagano F-term in Seiko Epson Corporation (reference) 2F082 AA00 CC01 DD01 DD07 DD10 HH00 HH01 JJ01 2F084 AA00 BB09 CC03 GG02 GG04 JJ05 LL00 LL03

Claims (10)

[Claims] 1. A mechanical energy source, a generator driven by the mechanical energy source coupled via a train wheel to generate induced power and provide electrical energy, and coupled to the train wheel. An electronically controlled mechanical timepiece comprising: a pointer, and a rotation control device driven by the electric energy to control a rotation cycle of the generator, wherein the rotation control device can short-circuit both ends of the generator. A switch, a comparison circuit for comparing the phase of an electromotive voltage waveform of the generator with a reference signal waveform serving as a time standard, and capable of generating two or more types of chopper signals having different duty ratios, and From inside, a chopper signal having a duty ratio set based on a signal from the comparison circuit is applied to the switch over a period of one cycle of the reference signal, so that the generator is controlled. Electronically controlled mechanical timepiece and having a Paringu controllable brake control circuit. 2. The electronically controlled mechanical timepiece according to claim 1, wherein the comparison circuit detects whether the phase of the electromotive voltage waveform is advanced or delayed with respect to the phase of the reference signal waveform. When the phase of the electromotive voltage waveform advances at least with respect to the phase of the reference signal waveform, the amount of advance is detected, and the braking control circuit generates at least the phase of the reference signal waveform. An electronically controlled mechanical timepiece configured to apply a chopper signal having a duty ratio corresponding to the amount of advance to the switch when the phase of the voltage waveform is advanced. 3. The electronically controlled mechanical timepiece according to claim 2, wherein the braking control circuit generates a chopper signal having a duty ratio that increases as the amount of advance of the phase of the electromotive voltage waveform with respect to the phase of the reference signal waveform increases. An electronically controlled mechanical timepiece which is added to the switch. 4. A mechanical energy source, a generator driven by the mechanical energy source coupled through the wheel train to generate induced power and provide electrical energy, and coupled to the wheel train. An electronically controlled mechanical timepiece comprising: a pointer, and a rotation control device driven by the electric energy to control a rotation cycle of the generator, wherein the rotation control device can short-circuit both ends of the generator. A switch, a comparison circuit for comparing the phase of an electromotive voltage waveform of the generator with a reference signal waveform serving as a time standard, and capable of generating two or more types of chopper signals having different frequencies. A chopper signal of a frequency set based on a signal from the comparison circuit is applied to the switch over a period of one cycle of the reference signal to control the generator by chopper ring control. Electronically controlled mechanical timepiece and having a brake control circuit as possible, a. 5. The electronically controlled mechanical timepiece according to claim 4, wherein the comparison circuit detects whether the phase of the electromotive voltage waveform is advanced or delayed with respect to the phase of the reference signal waveform, When the phase of the electromotive voltage waveform advances at least with respect to the phase of the reference signal waveform, the amount of advance is detected, and the braking control circuit generates at least the phase of the reference signal waveform. An electronically controlled mechanical timepiece, wherein when the phase of the voltage waveform is advanced, a chopper signal having a frequency corresponding to the amount of advance is applied to the switch. 6. The electronically controlled mechanical timepiece according to claim 5, wherein the braking control circuit outputs the chopper signal having a lower frequency as the amount of advance of the phase of the electromotive voltage waveform with respect to the phase of the reference signal waveform increases. An electronically controlled mechanical clock characterized by being added to a switch. 7. The electronically controlled mechanical timepiece according to claim 4, wherein the chopper signals having different frequencies have different duty ratios. 8. A mechanical energy source, a generator driven by the mechanical energy source coupled through the wheel train to generate induced power and provide electrical energy, and coupled to the wheel train. A control method of an electronically controlled mechanical timepiece, comprising: a pointer, and a rotation control means driven by the electric energy to control a rotation cycle of the generator. By comparing the phase with the signal waveform, a switch capable of short-circuiting each terminal of the generator is provided with a chopper signal having a duty ratio set according to the phase difference from two or more types of chopper signals having different duty ratios. In addition, a method for controlling an electronically controlled mechanical timepiece, characterized in that a switch is turned on and off and a generator is brake-controlled by chopper ring. 9. A mechanical energy source, a generator driven by the mechanical energy source coupled through the wheel train to generate induced power and provide electrical energy, and coupled to the wheel train. A control method of an electronically controlled mechanical timepiece, comprising: a pointer, and a rotation control means driven by the electric energy to control a rotation cycle of the generator. Compare the phase with the signal waveform, and add a chopper signal of a frequency set according to the phase difference from two or more types of chopper signals having different frequencies to a switch capable of short-circuiting each terminal of the generator. A method for controlling an electronically controlled mechanical timepiece, wherein a switch is turned on and off, and a generator is brake-controlled by choppering. 10. The control method for an electronically controlled mechanical timepiece according to claim 9, wherein the two or more types of chopper signals having different frequencies have different duty ratios. .