WO1994016365A1 - Electronic timepiece - Google Patents
Electronic timepiece Download PDFInfo
- Publication number
- WO1994016365A1 WO1994016365A1 PCT/JP1994/000030 JP9400030W WO9416365A1 WO 1994016365 A1 WO1994016365 A1 WO 1994016365A1 JP 9400030 W JP9400030 W JP 9400030W WO 9416365 A1 WO9416365 A1 WO 9416365A1
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- detection
- circuit
- signal
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- 238000001514 detection method Methods 0.000 claims abstract description 354
- 230000002194 synthesizing effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 61
- 238000013016 damping Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 230000004907 flux Effects 0.000 description 8
- 101150001999 ITPA gene Proteins 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 6
- 238000005381 potential energy Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 101100518987 Mus musculus Pax1 gene Proteins 0.000 description 1
- 101100518992 Mus musculus Pax2 gene Proteins 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
- G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step
Definitions
- the present invention relates to an electronic timepiece that outputs a plurality of detection auxiliary pulses to a step motor after a main drive pulse is interrupted and detects the rotation of the step motor in a stable manner.
- step watches for electronic watches output a main drive pulse with small effective power to the step motor to reduce current consumption.
- stepping motor driving means for detecting the rotational state of the rotor by some means and outputting a corrected driving pulse to the step motor according to the detection result have been put into practical use.
- practical examples are disclosed in Japanese Patent Publication No. Sho 61-83392 and Japanese Patent Publication No. Sho 63-181.
- Fig. 2 shows an example of a drive voltage waveform diagram of the correction drive system
- Fig. 3 shows an example of a practical application known in Japanese Patent Publication No. 6-83392.
- 7 shows an example of a voltage waveform after a main drive pulse is cut off.
- the outline of the drive voltage waveform diagram shown in Fig. 2 consists of a main drive pulse P1 (hereinafter referred to as P1) that is output to the step motor every second, and a section DT that detects the rotation of the step motor after P1 is cut off. And a correction drive pulse P 2 (hereinafter referred to as P 2) output when the step motor stops rotating at P 1.
- P1 automatically changes its pulse width according to the load applied to the step motor.
- P2 is a step drive where the rotor is normal in P1. The pulse width is large enough to output sufficient torque to output when the movement cannot be executed.
- Fig. 3 shows the voltage waveform induced in the detection resistor by forming a closed loop in the coil after the pulse is cut off by controlling the stepping motor drive MOS gate and the like.
- the rotor rotation detecting means utilizes the fact that the induced voltage in section DT is different between rotation (solid line in Fig. 3) and non-rotation (dotted line in Fig. 3). An identification method that electrically detects whether a certain voltage has been reached is used.
- this detection means is that the rotor rotated by the main drive pulse makes a free rotation motion by the magnetic potential energy of the rotor after the main drive pulse is cut off, and the induced voltage change generated in the coil during the damping motion. Is used for the rotation detecting means.
- Fig. 4 shows an example of a driving voltage waveform diagram of the correction driving method in a practical example known in Japanese Patent Publication No. 63-181418
- Fig. 5 shows an example of driving a motor with a detection pulse. 5 shows an example of a current waveform that sometimes occurs.
- the outline of the drive voltage waveform diagram shown in Fig. 4 is that the main drive pulse P1 that is output to the step motor every 1 second and the detection pulses Px and Py that detect the rotation of the step motor after P1 is shut off And a correction drive pulse P2 output when the step motor stops rotating at P1.
- P1 and P2 are the same as the outlines of P1 and P2 described in FIG.
- the pulse widths of the detection pulses Px and Py are short enough that the step motor cannot rotate.
- Fig. 5 shows the current waveform when the contactor is driven by the detection pulse.
- the current waveform is the line a or b in Fig. 5 depending on the direction of the magnetic pole of the contactor.
- the reason why the current waveform is different is that the magnetic pole formed over time by the detection pulse is in a repulsive state with respect to the direction of the magnetic pole of the rotor magnet or is attracted. It is because it is determined by the state.
- the rotation detection means of the rotor is
- the rotor is driven by the detection pulse, and the direction of the magnetic pole of the rotor is identified by the shape difference of the current waveform flowing through the coil at that time, and the rotation of the rotor is detected.
- the feature of this detection means is to detect the rising voltage of the current waveform (rising shape of the voltage waveform) using the detection pulse that becomes the effective power accompanied by the current consumption, and to detect the position of the magnetic pole of the rotor magnet. Judge the rotation of the rotor.
- the conventional rotation detection method has the following problems to accurately determine the rotation of the rotor.
- the induced voltage generated by the free rotation of the rotor within a predetermined time includes the induced voltage as shown in Fig. 6, the pulse width of the main drive pulse, and There is a relationship between the induced voltage and the moment of inertia of the rotor.
- the induced voltage is sufficiently high from the shortest pulse width T1 that enables normal step drive to a somewhat longer pulse width T2.
- the pulse width becomes longer than T2
- the induced voltage decreases rapidly. This phenomenon is caused by the fact that the rotor has low magnetic potential energy after blocking a pulse with a long pulse width, and the amplitude of the rotor damping motion decreases, so that the induced voltage decreases in proportion to the amplitude of the rotor damping motion. by.
- a step motor consisting of a rotor with a small inertia moment can not only reduce power consumption but also easily realize rotation and stop.
- a rotor with small moment of inertia can rotate with a small amount of effective power. This is a damping motion that can rotate and has a small amplitude, and stops shortly after the pulse is cut off.
- the amplitude is small in this way, the absolute number of magnetic fluxes crossing the coil is small, and the induced voltage due to the damping motion of the rotor is also low.
- the rotation-decay movement of the mouth decreases rapidly, if the method of detecting the induced voltage at a predetermined time is used, the rotor is almost in a stopped state, and the change in magnetic flux per unit time The induced voltage generated by the rotation is small, and the rotation of the rotor is determined to be non-rotation.
- the power consumption increases because the pulse width of the main drive pulse needs to be increased in order to increase the driving torque. If the inertia moment of the rotor is reduced in order to reduce power consumption, the amplitude of the free rotation and decay motion of the rotor after the pulse is cut off becomes smaller, resulting in a lower induced voltage and erroneous determination of the rotation of the rotor.
- the pulse width of the detection pulse needs to be increased to some extent in order to accurately determine the rotor magnetic pole, and the problem that the current consumption of the step motor increases. there were. Further, if the detection pulse is not output from the stationary state of the rotor, the rotation of the rotor is determined erroneously, so that the output timing of the detection pulse must be delayed, and the output timing of the correction drive pulse output when the rotor is not rotating. The mining slows down, and as a result, the movement of the hands appears unnatural due to the delay.
- An object of the present invention is to solve the above-mentioned conventional problems by providing an electronic timepiece capable of realizing a small size and low power consumption by increasing the accuracy of detecting the rotation of a mouth. Disclosure of the invention
- the present invention has a step motor and a train wheel.
- at least one auxiliary pulse signal which is an effective power pulse that does not cause the step motor 7 to rotate one step, is generated based on the clock signal input from the frequency dividing circuit 8. Then, based on the detection auxiliary pulse generation circuit 1 output to the driving pulse selection circuit 4 and the clock signal input from the frequency dividing circuit 8, at least one or more types of main driving pulse signals are generated to generate driving pulses.
- a corrected drive pulse signal longer than the main drive pulse is output to the drive pulse selection circuit 4
- the correction drive pulse generation circuit 2 and the main drive pulse signal, the detection auxiliary pulse signal, and the presence or absence of the output of the correction drive pulse signal corresponding to the detection signal from the detection circuit 6 are selected.
- a drive pulse selection circuit 4 that outputs a main drive pulse signal, a detection auxiliary pulse signal, and a correction driving pulse signal to the drive circuit 5; a main drive pulse signal and a detection auxiliary pulse signal input from the drive pulse selection circuit 4; A drive circuit 5 that converts the corrected drive pulse signal into an effective power pulse and outputs it to the step motor 7, and a circuit switch based on the clock signal input from the frequency divider 8 to detect the rotation of the step motor 7 Then, a detection signal corresponding to the rotation detection result is generated, and the detection auxiliary pulse is applied to the step motor 7 as a circuit configuration having the detection circuit 6 which outputs the detection signal to the drive pulse selection circuit 4. A configuration that ensures rotation detection and improves detection accuracy was adopted.
- the electronic timepiece configured as described above applies the detection auxiliary pulse to the step motor after a certain time has elapsed after the main drive pulse applied to the step motor is cut off every second.
- the rotation angular velocity of the rotor that rotates and attenuates freely after the main drive pulse is cut off becomes faster than before the detection auxiliary pulse is applied, because the rotation speed is amplified by the detection auxiliary pulse. Then, the potential of the induced voltage generated in the coil increases in proportion to the rotational angular velocity of the rotor.
- FIGS. 7 (a) to 7 (e) and FIG. 8 a description will be given of a point where the rotation speed of the rotor is increased and the amplitude of the rotational damping motion is increased by the application of the detection auxiliary pulse as described above.
- FIG. 7A is a diagram showing that the rotor 70 is stationary at a magnetically stable angle or. This is because a magnetic potential energy difference occurs between the notches 72, 73 provided on the stator 71 and the magnet of the rotor 70, and the angle or at which the energy difference is the smallest is generated. This is because the rotor stops.
- the rotor 70 stops rotating at a magnetically stable angle or 1 so that the rotor 70 performs a free rotation damping motion. Start. At this time, the rotor 70 has the magnetic potential energy and the rotational energy due to the inertial force generated by the main drive pulse.
- the rotor 70 performs a free rotation damping motion as shown by a solid line waveform in FIG. 8 and stops at a magnetically stable angle or l shown in FIG. 7 (e).
- the detection auxiliary pulse Pa applied to the stepping motor to induce the rotation of the rotor during the free rotation of the rotor after the main drive pulse P1 is cut off, the amplitude of the above-mentioned decay movement is also reduced. It has the effect of increasing the amount of change in the magnetic flux interlocking with the coil necessary for detecting the rotation of the rotor and increasing the induced voltage.
- the rotation of the step motor can be easily detected by increasing the potential of the induced voltage with a detection assist pulse. And accurate.
- FIG. 1 is an explanatory diagram showing a block diagram of a first embodiment of the present invention.
- FIG. 2 is a drive voltage waveform diagram showing an example of a conventional correction drive method.
- FIG. 3 is a diagram showing an example of a voltage waveform due to the rotational free-falling motion of the step motor after the main drive pulse is cut off.
- FIG. 4 is a drive voltage waveform diagram showing another example of the conventional correction drive method.
- FIG. 5 is a diagram illustrating an example of a drive current waveform during detection pulse driving.
- FIG. 6 is an explanatory diagram showing the relationship between the pulse width and the induced voltage.
- FIG. 7 are explanatory diagrams showing the operation principle of the rotor of the embodiment of the present invention.
- FIG. 8 is a diagram showing the relationship between the drive pulse and the rotation angle of the rotor according to the embodiment of the present invention.
- FIG. 9 is a diagram showing the drive voltage waveform of the first embodiment of the present invention.
- FIG. 10 is a circuit diagram showing an example of the main drive pulse generating circuit 3 of the present invention.
- FIG. 11 is a circuit diagram showing an example of the correction driving pulse generation circuit 2 according to the present invention.
- FIG. 12 is a circuit diagram showing an example of the detection auxiliary pulse generation circuit 1 according to the present invention.
- FIG. 13 is a circuit diagram showing an example of the drive pulse selection circuit 4 according to the present invention.
- FIG. 14 is a timing chart showing input / output signals of the drive pulse selection circuit 4 according to the present invention.
- FIG. 15 is a circuit diagram showing an example of the driving circuit 5 according to the present invention.
- FIG. 16 is a diagram illustrating a path of a current flowing through the coil according to the embodiment of the present invention.
- FIG. 17 is a circuit diagram showing an example of the detection circuit 6 according to the present invention.
- FIG. 18 is a timing chart showing the electrical operation of the drive circuit 5 and the detection circuit 6 in the present invention.
- FIG. 19 is a flowchart showing the operation of the circuit configured in the first embodiment of the present invention.
- FIG. 20 is an explanatory diagram showing a block diagram of the second embodiment of the present invention.
- FIG. 21 is a diagram showing a drive voltage waveform according to the second embodiment of the present invention.
- FIG. 22 is a circuit diagram showing an example of the detection auxiliary pulse output selection circuit 10 shown in the second embodiment of the present invention.
- FIG. 23 shows the detection auxiliary pulse output selection shown in the second embodiment of the present invention.
- 7 is a timing chart showing the electrical operation of the selection circuit 10.
- FIG. 24 is a flowchart showing the operation of the circuit configured in the second embodiment of the present invention.
- FIG. 25 is an explanatory diagram showing a block diagram of the third embodiment of the present invention.
- FIG. 26 is a diagram showing a drive voltage waveform according to the third embodiment of the present invention.
- FIG. 27 is a circuit diagram showing an example of the detection / capture pulse width variable circuit 11 shown in the third embodiment of the present invention.
- FIG. 28 is a timing chart showing the electrical operation of the auxiliary detection pulse width variable circuit 11 shown in the third embodiment of the present invention.
- FIG. 29 is a flowchart showing the operation of the circuit according to the third embodiment of the present invention.
- FIG. 30 is an explanatory diagram showing a block diagram of the fourth embodiment of the present invention.
- FIG. 31 is a circuit diagram showing an example of the detection auxiliary pulse output counter circuit 12 shown in the fourth embodiment of the present invention.
- FIG. 32 is a timing chart showing the electrical operation of the detection auxiliary pulse output power circuit 12 and the detection auxiliary pulse output selection circuit 10 shown in the fourth embodiment of the present invention.
- FIG. 33 is a flowchart showing the operation of the circuit configured in the fourth embodiment of the present invention.
- FIG. 34 is an explanatory diagram showing a block diagram of the fifth embodiment of the present invention.
- FIG. 35 shows a drive voltage waveform according to the fifth embodiment of the present invention.
- FIG. 36 is a circuit diagram showing an example of the detection / capture pulse output timing generation circuit 13 shown in the fifth embodiment of the present invention.
- FIG. 37 shows the output waveform of the auxiliary detection pulse shown in the fifth embodiment of the present invention.
- FIG. 38 is a timing chart showing the electrical operation of the timing generation circuit 13.
- FIG. 38 is a flow chart showing the operation of the circuit configured in the fifth embodiment of the present invention.
- FIG. 39 is an explanatory diagram showing a block diagram of the sixth embodiment of the present invention.
- FIG. 40 is a diagram showing a drive voltage waveform according to the sixth embodiment of the present invention.
- FIG. 41 is a circuit diagram showing an example of the detection auxiliary pulse output selection circuit 10 shown in the sixth embodiment of the present invention.
- FIG. 42 is a timing chart showing the electrical operation of the detection auxiliary pulse output selection circuit 10 shown in the sixth embodiment of the present invention.
- FIG. 43 is a circuit diagram showing an example of the raw drive pulse generation circuit shown in the sixth embodiment of the present invention.
- FIG. 44 is a circuit diagram showing an example of the main drive pulse generation circuit shown in the sixth embodiment of the present invention.
- FIG. 45 is a timing chart showing the electrical operation of the main drive pulse generation circuit shown in the sixth embodiment of the present invention.
- FIG. 46 is a flowchart showing the operation of the circuit according to the sixth embodiment of the present invention.
- FIG. 47 is an explanatory diagram showing a block diagram of the seventh embodiment of the present invention.
- FIG. 48 is a diagram showing a drive voltage waveform according to the seventh embodiment of the present invention.
- FIG. 49 is a circuit diagram showing an example of the detection auxiliary pulse width variable circuit 11 shown in the seventh embodiment of the present invention.
- FIG. 50 is a timing chart showing the electrical operation of the auxiliary detection pulse width variable circuit 11 shown in the seventh embodiment of the present invention.
- FIG. 51 is a flowchart showing the operation of the circuit according to the seventh embodiment of the present invention.
- FIG. 52 is an explanatory diagram showing a block diagram of the eighth embodiment of the present invention.
- FIG. 53 is a diagram showing a drive voltage waveform according to the eighth embodiment of the present invention.
- FIG. 54 is a circuit diagram showing one example of the detection auxiliary pulse output timing generation circuit 13 shown in the eighth embodiment of the present invention.
- FIG. 55 is a timing chart showing the electric operation of the detection auxiliary pulse output timing generation circuit 13 shown in the eighth embodiment of the present invention.
- FIG. 56 is a timing chart showing the eighth embodiment of the present invention.
- 5 is a flowchart showing the operation of the circuit constituted by.
- FIG. 57 are drive voltage waveforms showing a configuration example of the alternating pulse shown in the ninth embodiment of the present invention.
- FIG. 1 is a block diagram of a first embodiment of the present invention.
- the oscillation circuit (0SC) 9 is usually provided with a crystal oscillator, and emits a signal of 32768 Hz, and outputs this signal to the frequency dividing circuit 8.
- the frequency divider 8 divides the frequency of the clock signal up to 1 Hz by the 15-stage flip-flop, and generates the main drive pulse generation circuit 3, the correction drive pulse generation circuit 2, the detection auxiliary pulse generation circuit 1, and the detection A clock signal of each frequency is output to the circuit 6.
- the main drive pulse generation circuit 3 supplies the main drive pulse P 1, which is an effective power pulse, to the step motor ⁇ ⁇ ⁇ every second, so that the main drive pulse signal is generated based on the clock signal from the frequency divider 8. Generate and output the main drive pulse signal to the drive pulse selection circuit 4.
- the correction drive pulse generation circuit 2 supplies the correction drive pulse to the step motor 7 that ensures that the step motor rotates and completes a normal step operation.
- a correction driving pulse signal is generated based on the signal, and a correction driving pulse signal is output to the driving pulse selection circuit 4 at a predetermined timing.
- the detection auxiliary pulse generation circuit 1 generates a detection auxiliary pulse signal with a pulse width that does not rotate the step motor based on the clock signal input from the frequency divider 8 and detects it at a predetermined timing.
- the assist pulse signal is output to the drive pulse selection circuit 4.
- the drive pulse selection circuit 4 selects the presence or absence of the output of the correction drive pulse signal according to the main drive pulse signal and the detection auxiliary pulse signal, and the detection signal output from the detection circuit 6, and drives according to an arbitrary timing. Output to circuit 5.
- the correction drive pulse signal is output to the drive circuit 5 only when the detection circuit 6 determines that the rotation detection result of the rotor 70 is non-rotation.
- the drive II path 5 supplies the main drive pulse signal, the detection auxiliary pulse signal, and the correction drive pulse signal input from the drive pulse selection circuit 4 to the step motor ⁇ as an effective power pulse.
- the detection circuit 6 generates a signal in a detection section for performing the rotation detection of the rotor only for a predetermined time based on the signal input from the frequency dividing circuit 8, and executes the rotation detection operation of the step motor 7 according to the signal. Then, information on rotation or non-rotation is output to the drive pulse selection circuit 4 as a detection signal.
- the output of the step motor 7, that is, the rotational motion is transmitted to a wheel train, hands, and the like.
- the main drive pulse generation circuit 3 is composed of a latch circuit 301 and a NOR gate 302, and synchronizes with the clock signal 1Q from the frequency divider 8 and the rising signal of the 64M, and every second.
- a main drive pulse signal S302 is generated.
- one embodiment of the correction drive pulse generation circuit 2 includes a latch circuit, a NOR gate, a NOT gate, an AND gate, and the like. This correction drive pulse generation circuit 2 operates, and the correction drive pulse signal S202 output 31.25 msec after the fall of 1Q is shown in the timing chart of FIG. is there.
- a pulse is used in which a continuous pulse and an intermittent pulse are combined.
- one embodiment of the detection auxiliary pulse generation circuit 1 is composed of latch circuits 102 and 103 and NOR gates 101 and 104 and the like.
- the detection auxiliary pulse generation circuit 1 starts to output the detection auxiliary pulse signal S101 after 4.9 msec from the fall of 1Q, and performs the detection auxiliary according to the clock signal 5 1 2 Mbar to the latch circuit 103. Cut off the output of pulse signal S101.
- the output timing of the detection auxiliary pulse signal S101 is shown in the timing chart of FIG.
- the drive pulse selection circuit 4 is as shown in FIG. 13.
- the 0 R gate 410 is provided for selecting an output of a pulse signal input from each pulse generation circuit to the drive circuit 5.
- Signals S101, S302, S403 are input to its input terminals Have been.
- the OR gate 402 is provided for synthesizing the polarity inversion signal S 402 to the T FF 404 for controlling the applied voltage polarity of the pulse.
- the signals S101, S302 and S407 are input to the input terminals.
- the AND gate 403 was provided to control the presence or absence of the output of the correction drive pulse.
- the drive pulse signal S401 which is the output signal of the OR gate 401, is input to the gate circuit 405.
- the polarity inversion signal S 402, which is the output signal of the OR gate 402 is input to the T terminal of the TFF 404.
- the output signals S404Q and S404QX of the TFF404 are set to "High (hereinafter referred to as" H ")" or O
- the TFF output signals S404Q and S404QX are input to the gate circuit 405 and the NAND gate 406.
- the gate circuit 405 and the NAMD gate circuit 406 are composed of the drive pulse signal S401, the TFF output signal S404Q and 404QX, and the MOSFET input from the detection circuit 6.
- the drive MOS FET control signals S405A to D for controlling the ONZOFF of the step MOSFET overnight drive MOS FETs are shown in Figs. b)
- the detection MOS FET control signals S406A and S406B for controlling the ONZOFF of the detection MOS FET are shown in Figs. 15 (a) and (b). Output to one terminal.
- the drive circuit 5 is composed of motor drive MOSFETs 501 to 504, detection MOSFETs 505 and 506, and resistance elements 507 and 508. Then, according to the input signal to the gate terminal of each MOSFET: The MOS FETs 501 to 506 perform 0N / 0FF operation. And By applying drive pulses P 511 and P 5 12 to the step motor 7 from the output terminals 5 11 and 5 12 connected to the coil 7, the rotation of the step motor 7 is realized.
- FIG. 14 is a timing chart showing control signals S 405 A to S 405 D, S 406 A, and S 406 B of the respective MOS FETs input to the drive circuit 5.
- FIG. 16 is a diagram showing a current path flowing through the coil. Paths (1) and (2) are the current paths of the drive pulse for applying the reverse current to the coil. Paths 3 and 5 are high-impedance closed loops that include a detection resistor 507 or 508 (a resistance element of several hundred ⁇ ). Path 4 is a state where both ends of coil 74 are short-circuited.When MOSFET 505 or 506 is ON, there are two paths through which current flows, but the path is 4 due to the effect of the detection resistor. It will be.
- the detection circuit 6 is composed of an AND gate 601 and a gate circuit 602 and an OR gate 603 It consists of a latch circuit 605 and a reference voltage generating resistor element 604.
- the detection operation of the detection circuit 6 is as follows.o
- the signal S 604 is a reference voltage VTH for rotation determination (hereinafter referred to as VTH), and is a potential generated by the resistance element 604.
- Signals S507 and S508 are detection voltages VRS (hereinafter referred to as VRS) obtained by amplifying the induced voltage generated in the coil by detection resistors 507 and 508. It is also a transient voltage caused by switch switching over a period of 4 and 5.
- the comparator 605 becomes “L” in the state of "VTH VRS" and “H” in the state of "VTH> VRS".
- the comparator output signal S605 is output to the SET terminal of the latch circuit 606.
- Figure 18 shows the above detection operation in a timing chart.
- Fig. 18 shows the motor drive pulses P511 and P512 output from the drive circuit 5 to the step motor 7, and the rotation detection voltage S500 input from the step motor 7 to the detection circuit 6. 7, S508, a signal S605 that is obtained by electrically comparing the VTH and the rotation detection voltage with the detection circuit 6, and a detection signal S606 that is an output signal of the detection circuit 6 are shown.
- the main drive pulse was applied to the stepper motor from the 511 terminal side in Fig. 18 and the detection auxiliary pulse was applied from the 512 terminal side.
- the rotor was not rotating, the comparator output signal S605 and the detection signal S606 remained "L", and the correction drive pulse was applied in the step mode.
- the main drive pulse was applied to the step motor from the 5 12 terminal side in Fig. 18 and the detection auxiliary pulse was applied from the 5 1 1 terminal side. So As a result, the signal S605 becomes "H” of one shot, and the detection signal S606 becomes “H”. Since the correction drive pulse is not applied to the stepping motor when the detection signal S 606 is “H”, there is no voltage waveform of the correction drive pulse in the drive pulse P 512. When the master signal of 1 Hz is "H”, the latch circuit 606 is in the reset state, and the detection signal S606 is also "L".
- the gate circuit and the like are initialized (2002). Then, the main drive pulse P1 is output to the step motor (2003), and after the main drive pulse is cut off, the detection auxiliary pulse Pa is output (2004) in the step mode. Further, after the detection auxiliary pulse is cut off, the operation proceeds to the next rotation detection operation.
- rotation detection (2005) rotation or non-rotation of the rotor is determined.
- the detection method compares VTH and VRS. If VRS
- the circuit of this embodiment is characterized in that a detection auxiliary pulse is applied to the motor. The purpose is to increase the accuracy of rotation detection by applying the detection auxiliary pulse.
- the circuit configuration of the second embodiment of the present invention is different from the circuit configuration of the first embodiment described in the previous section in that a detection auxiliary pulse output selection circuit 10 is added (see the block diagram shown in FIG. 20). Detection auxiliary pattern according to the detection signal input from the It is characterized by selecting the output of the pulse signal (see Fig. 21).
- one embodiment of the detection auxiliary pulse output selection circuit 10 is composed of an RS latch circuit 1001, an OR gate 1002, AND gates 1003 and 1005, and a NOR gate 1004.
- FIG. 23 is a timing chart showing a series of operations of the detection auxiliary pulse output selection circuit 10.
- the signals input to the detection auxiliary pulse output selection circuit 10 are a detection auxiliary pulse signal S101, a detection signal S606 from the detection circuit 6, an output signal S201 from the correction driving pulse generation circuit, and a reset signal.
- the NOR gate 1004 is connected to the SET terminal of the RS latch circuit 1001.
- the correction drive pulse signal S201 falls to "L” while the signal S606 remains at “L”
- the output signal S1004 becomes “H” is output to the RS latch circuit 1001
- the RS latch circuit 1001 enters a SET state (outputs "H” from the output terminal Q).
- the output of the AND gate 1003 turns high, and when the RS latch circuit 1001 is in the SET state, the output signal S 1003 becomes "H" and is input to the OR gate 1002.
- the OR gate 1002 is connected to the RESET terminal of the RS latch circuit 1001, and when the reset signal or the signal S 1003 rises to “H”, the RS latch circuit 1001 is in the reset state (from the output terminal Q "L is output).
- the RS latch circuit 1001 enters the SET state when the rotor is detected to be non-rotating, and enters the REST state when the rotor is detected to rotate when the signal S1001 is H "(SET state). Even if the rotor is detected in the RESET state (signal S1001 is "L"), signal S1001 does not change.
- the AND gate 1005 outputs the detection auxiliary pulse signal S 1005 to the OR gate 401 of the drive pulse selection circuit 4 when the RS latch circuit 1001 is in the SET state.
- rotation detection (2005) rotation or non-rotation of the mouth is determined.
- the circuit configuration of the third embodiment of the present invention is different from that of the first embodiment described in the previous section in that a detection auxiliary pulse width variable circuit 11 is added (see the block diagram shown in FIG. 25). It is characterized in that the pulse width of the detection auxiliary pulse signal is varied according to the detection signal input from the controller (see Fig. 26).
- An embodiment of the detection auxiliary pulse output selection circuit 11 according to the present invention is as shown in FIG. 27.
- a plurality of clock signals input from the frequency divider 8 are output.
- One clock signal S 1101 is selected and output to the detection auxiliary pulse generation circuit 1.
- FIG. 28 shows a timing chart of the output timings of these signals.
- the detection auxiliary pulse width variable circuit 11 includes a NAND gate 1101, a gate circuit 1102, a latch circuit 1103, a gate circuit 1104, an OR gate 1105, and the like.
- the input signals of the gate circuit 1104 are S201 and S606, and the output signals S1104a and S1104b are combined into a rising signal synchronized with S201 according to the rotation and non-rotation of the rotor, and the output signal S 1104a is output to the SET terminal of the latch circuit 1103, and the output signal S1104b is output to the input terminal of the OR gate 1105.
- the input signals of the OR gate 1105 are the aforementioned S 1104 b and the RESET signal, and the output terminal is connected to the RESET terminal of the latch circuit 1103.
- the latch circuit 1103 changes the output signal S 1103 a of the output terminal Q to “in the SET state (the electrical state after the input signal S 1104 a becomes“ H ”).
- the output signal S 1103 b of the output terminal QX is set to “H” in the reset state (the electrical state after the input signal S 1 105 has changed to “H”) as “H”.
- the input signals of the gate circuit 1102 are a signal (2 KMb ar signal) obtained by inverting the signals 1103a and 1103b and a master signal of 2 KHz and a master signal of IK Hz (1KM signal).
- the output signal S1102a is a falling clock signal synchronized with the 2KMbar signal (the signal S1102b remains at the "H” level).
- the output signal S 1102 b becomes a clock signal synchronized with the 1 KM signal (the signal S 1102 a remains “H”).
- the NAND gate 1 101 is a gate element provided to output the input signals S 1102 a and S 1102 b as one clock signal, and the output signal S 1101 is a 2 KM bar signal or 1 It becomes the rising clock signal of either of the KM signals.
- the output terminal is connected to the gate terminal of the latch circuit 103.
- Clock signal in detection auxiliary pulse width variable circuit 11 in third embodiment The selection of two types of clock signals is selected.
- the detection circuit determines that the circuit is rotating 6 times, the circuit is in the SET state, and when it is determined that the circuit is not rotating, the circuit is in the RESET state.
- the input signal may be controlled using a counter or the like.
- rotation detection (2005) rotation or non-rotation of the rotor is determined.
- the detection method is to compare VTH and VRS. If
- VTH I, the correction drive pulse P2 is output (2006) throughout the step mode. After that, rewrite the control signal m 2 to "m2 1" (2 0 17) o
- the pulse width of the detection auxiliary pulse can be variably controlled according to the detection result of the rotation of the rotor. By performing the pulse width variable operation of the detection auxiliary pulse, the accuracy of rotation detection is increased. By the way, since Pa0 and Pa1 can be easily determined on an electric circuit, it is not necessary to specify each of the above pulse widths.
- the circuit configuration of the fourth embodiment of the present invention is different from the circuit configuration of the second embodiment described in the previous section in that a detection auxiliary pulse output counter 12 is added (see the block diagram shown in FIG. 30) to output a detection auxiliary pulse signal. It is characterized by counting the number of times and selecting whether to output a detection auxiliary pulse signal according to the detection signal input from the detection circuit 6 and the measurement result.
- FIG. 31 One embodiment of the detection auxiliary pulse output selection circuit 10 and the detection auxiliary pulse output counter 12 according to the embodiment of the present invention is a circuit shown in FIG. 31, and FIG. 32 is a timing chart. With reference to FIG. 31 and FIG. 32, the configuration and operation of the circuit which is one embodiment of the fourth embodiment of the present invention will be described below.
- the detection auxiliary pulse output counter 12 is a circuit including a NOR gate 1201, a NAND gate 1202, a counter 1203, and an OR gate 1204.
- the counter 1203 is a 2-bit binary counter, and switches the output signals S 1203 a and S 1203 b of the counter 1203 to “H” or “L” in synchronization with the fall of the signal S 1005.
- a combination signal (for example, “H” for S 1203 a and “L” for S 1203 b) is output to the NAND gate 1202.
- NAND gate 1202 is powered by signals S 1203a and S 1203b "H Only when the signal is "1", the signal S1222 is set to "L". The signal S12203a and S12203b become “H” only after the counter 1220 after reset. Only when the signal is input to 3 three times.
- NOR gate 1 201 is synchronized with the master signal of 1 Hz. Then, when all the input signals are "L”, the output signal S1221 is set to "H".
- the OR gate 1204 receives the RESET signal and the signal S104, and the output signal S1204 is output to the reset terminal of the counter 123.
- the detection auxiliary pulse output selection circuit 10 is AND gated with the latch circuit 1001.
- the latch circuit 1 0 1 outputs the output signal S in synchronization with the rise of the input signal.
- the output terminal of the AND gate 105 is connected to the OR gate 401 of the drive pulse output selection circuit 4 and the T terminal of the TFF 1203, respectively.
- the input signals are the detection and capture pulse signal S101 and the signal S1001, and only when the signal S1001 is "H", the input signal S101 is used as the output signal S1005. Output.
- the input signals of the AND gate 1003 are the detection signal S606 from the detection circuit 6, the output signal S12201 of the detection auxiliary pulse output counter 12 and the signal S1001.
- the output terminal is connected to the OR gate 1002, and the signal S1003 becomes "H” when all the input signals are "H”.
- the output terminal of OR gate 1002 is connected to the RESET terminal of the latch circuit.
- the input signals are a RESET signal and a signal S 1003, and when either signal becomes “H”, the signal S 1002 becomes “H”.
- the output terminal of the NOR gate 1004 is connected to the SET terminal of the latch circuit and the OR gate 1204.
- the input signals are the inverted signal of the signal S606 and the signal S201.
- the output signal S 1002 is “L” when the rotor is rotating, and is “H” when the rotor is not rotating.
- Rotation detection (2005) determines whether the rotor is rotating or not.
- the circuit configuration in the fifth embodiment of the present invention is obtained by adding a detection auxiliary pulse output timing generation circuit 13 to the circuit configuration of the first embodiment described in the previous section (see the block diagram shown in FIG. 34). It is characterized in that the output start timing of the detection auxiliary pulse signal is varied according to the input detection signal (see FIG. 35).
- FIG. 36 An embodiment of the detection auxiliary pulse output timing generation circuit 13 according to the embodiment of the present invention is a circuit shown in FIG. 36, and FIG. 37 is a timing chart. With reference to FIG. 36 and FIG. 37, the configuration and operation of a circuit which is one embodiment of the fifth embodiment of the present invention will be described below.
- Detection auxiliary palace output timing generation circuit 13 consists of OR gates 1301, 1305, 1306, NOR gate circuit 1302, and RS latch circuit 1. 303 and a gate circuit 1304.
- the gate circuit 1304 outputs a signal S1304a to the SET terminal of the latch circuit 1303 according to two kinds of signals, the detection signal S606 from the detection circuit 6 and the output signal S201 from the correction driving pulse. And outputs the signal S 1304 b to the OR gate 1305.
- the OR gate 1305 outputs an “H” signal to the RESET terminal of the latch circuit 1303 when either the RESET signal or the signal S 1304 b becomes “H”.
- the latch circuit 1303 sets the signal S 1303 a to “L” in the RESET state, and sets the signal S 1303 b to “L” in the SET state.
- the NOR gate circuit 1302 is a signal obtained by synthesizing the inverted master signal (64 Mb ar and 256 Mb ar) from the frequency divider circuit 8 with the OR gate 1306 S 1306 and the 1024 Mb ar master signal and the signal S 1303 a And S 1303 b as input signals.
- "H" is output at the timing of the combination in which the input signal becomes "L”.
- the respective output signals S 1302 a and S 1302 b are input to the OR gate 1301. Incidentally, the output signal S1302a rises 4.88 ms after the fall of the 1Q signal, and the output signal S1302b rises 5.13ms after the fall of the 1Q signal.
- the OR gate 1301 is provided to convert the two output signals S 1302 a and S 1302 b into one detection auxiliary pulse output timing variable signal S 1301.
- Variable detection auxiliary pulse output timing shown in Fig. 36 described above The circuit 13 operates in response to the detection signal S606, thereby making it possible to vary the output timing of the detection and capture pulse signal.
- rotation detection (2005) rotation or non-rotation of the mouth is determined.
- the circuit configuration according to the sixth embodiment of the present invention includes a detection auxiliary pulse output selection circuit 10 added to the circuit configuration of the first embodiment described in the previous section (see the block diagram shown in FIG. 39), and a main drive pulse. It is characterized in that the presence or absence of the output of the detection auxiliary pulse signal is selected according to the gate output signal of the generation circuit 3 (see FIG. 40).
- the main drive pulse generation circuit 3 converts an output signal (S303 to S308) of the up counter 303 composed of a TFF, a NAND gate, and the like into eight types of gate output signals (S303 to S308).
- a gate circuit 304 that divides the signal into S 309 to S 316), and a gate output signal S 309 to S 316 of the gate circuit 304 that is a master from the frequency dividing circuit 8
- a gate circuit 305 that generates a main drive pulse cutoff timing signal S3 17 in synchronization with one signal and a latch circuit that generates a main drive pulse signal S3 18 every second. It consists of a single circuit, such as 106.
- the output signal S606 of the detection circuit 6 and the output signal S201 from the correction drive pulse generation circuit are input to the input gate of the up counter 303.
- the timing chart shown in FIG. 45 is composed of the input signal S319 and output signal S303 to S308 of the up counter 303, and the gate output signal S309 of the gate circuit 304. S 316 and the main drive pulse signal S 318 are shown. The main drive pulse In order to clarify the operation of the generation circuit 3, FIG. 45 always shows the operation when the rotor is not rotating.
- FIG. 41 An embodiment of the detection auxiliary pulse output selection circuit 10 according to the embodiment of the present invention is a circuit shown in FIG. 41, and FIG. 42 is a timing chart. With reference to FIGS. 41 and 42, the configuration and operation of a circuit according to a sixth embodiment of the present invention will be described below.
- An embodiment of the detection auxiliary pulse output selection circuit 10 is also as shown in FIG. 41, and has an AND gate 1006, an OR gate 1007, a NOR gate 1008, and the like.
- the OR gate 10007 outputs an “H” signal to the AND gate 1006 when either of the gate output signals S 3 15 and S 3 16 is “H”.
- the NOR gate 1008 outputs an "H” signal to the AND gate 10006 when all of the gate output signals S309 to S314 are "L".
- the AND gate 1006 uses the detection auxiliary pulse signal S101 as the signal S1006 as the OR gate 4 only when the input signal S1007, S1008 is "H". 0 Output to 1.
- FIG. 42 shows the above circuit operation in a timing chart.
- the input signals S 3 18 and S 3 14 to S 316 from the main drive pulse generation circuit 3 and the detection auxiliary pulse signal S 101 and signals S401 and S403 of the drive pulse selection circuit 4 are shown.
- n 0" in the initial setting (2034).
- the main drive pulse P1 After the main drive pulse P1 is set, the main drive pulse P1 is output in the motor mode (2036), and the presence or absence of the output of the next detection auxiliary pulse Pa is determined (2037).
- the counter variable n is used to determine the presence or absence of output. If “n ⁇ 6", the detection auxiliary pulse Pa is output (2004). If “n ⁇ 5", the detection auxiliary pulse Pa is sent to the motor. Do not output.
- the next operation, rotation detection (2005) determines whether the rotor is rotating or not.
- the circuit configuration of the seventh embodiment of the present invention is different from the circuit configuration of the first embodiment described in the previous section in that a detection auxiliary pulse width variable circuit 11 is added (see the block diagram shown in FIG. 47) and the main drive pulse It is characterized in that the presence or absence of the output of the detection auxiliary pulse signal is selected according to the gate output signal of the circuit 3 (see FIG. 48).
- FIG. 49 One embodiment of the detection auxiliary pulse width variable circuit 11 according to the embodiment of the present invention is a circuit shown in FIG. 49, and FIG. 50 is a timing chart. Using FIG. 49 and FIG. 50, the configuration and operation of a circuit which is one embodiment of the seventh embodiment of the present invention will be described below.
- the detection auxiliary pulse width variable circuit 11 includes an OR gate 1108 and gate circuits 1106 and 1107.
- the gate circuit 1 106 is used when the gate output signal S 3 15 or S 3 16 of the main drive pulse generation circuit 1 is “H”, the signal S 1 106 a or S 1 106 b is output to the OR gate 1108.
- the gate circuit 1107 is used as a frequency dividing circuit as an output signal S1107 when any of the gate output signals S309 to S314 of the main drive pulse generation circuit 1 is "H". Output the master signal 2048M from 8 to OR gate 1108.
- the OR gate 1108 receives one of the input signals S1106a, S1106b and SI107 from the latch circuit 103 in the auxiliary detection pulse generation circuit 1. Output to the gate terminal as output signal S111.
- the signal S 103 in the detection auxiliary pulse generation circuit 1 is synthesized according to the output signal S 110, and the timing at which the detection assist pulse signal S 101 is cut off is controlled.
- the pulse width of the detection auxiliary pulse signal S101 was made variable.
- the main drive pulse P1 is set (20035) by P1-P0 + ⁇ P1.
- n is 0 to 7
- ⁇ 1 is 0.244 msec.
- the pulse width of the next detection auxiliary pulse Pa is selected (20339).
- rotation detection (2005) it is determined whether the rotor is rotating or not.
- the circuit configuration according to the eighth embodiment of the present invention is different from the circuit configuration of the first embodiment described in the previous section in that a detection auxiliary pulse output timing generation circuit 13 is added (see the block diagram shown in FIG. 52). It is characterized in that the output start timing of the detection auxiliary pulse signal is varied according to the gate output signal of the drive pulse generation circuit 3 (see FIG. 53).
- FIG. 54 An embodiment of the detection auxiliary pulse output timing generation circuit 13 according to the embodiment of the present invention is a circuit shown in FIG. 54, and FIG. 55 is a timing chart. With reference to FIGS. 54 and 55, the configuration and operation of a circuit according to an eighth embodiment of the present invention will be described below.
- the detection auxiliary pulse output timing generation circuit 13 is an OR gate 13 07 , 1311, a gate circuit 1308, a NOR gate 1309, a NOT gate 1310, and the like.
- the NOR gate 1309 becomes low when any of the gate output signals S309 to S315 of the main drive pulse generation circuit is "H", and the output signal S13009 becomes “L”. Output to the gate circuit 1308.
- the NOT gate 1310 inverts the gate output signal S3 16 of the drive pulse generation circuit and outputs the signal S 13 10 to the gate circuit 13 08.
- the OR gate 1311 outputs to the gate circuit 13 08 a composite signal S1311 based on the inverted master one signal 64Mbar and the 256Mbar of the frequency divider 8.
- the gate circuit 13 08 receives the signals S 13 09, S 13 10 and S 13 11 and the inverted master signal 10 24 Mbar of the frequency divider 8 as input signals, and outputs the gate. Only when the signal S3 16 becomes H ", an output signal S1308a based on the signal S1311 is output to the OR gate 1307. The gate output signal S When any of 309 to S315 is "H", the inverted master one signal 1024 Mbar is output to the OR gate 13007 as the output signal S13008b.
- the OR gate 1307 is connected to the gate of the latch circuit 102 in the detection auxiliary pulse generation circuit 1 when either the input signal S130a or S1308 is "H". Output the rising signal S1307 to the terminal.
- the output start time of the detection auxiliary pulse signal is determined by the signal S1307, and the output start time of the detection auxiliary pulse signal is also variable by changing S1307. .
- n 0
- P1 P0 + ⁇ P1.
- n is 0 to 7
- ⁇ 1 is 0.244 ms ec.
- the main drive pulse P1 is output to the motor (2036), and the pulse width of the next detection auxiliary pulse Pa is selected (2043).
- rotation detection (2005) it is determined whether the rotor is rotating or not.
- the ninth embodiment of the present invention is an embodiment in which the auxiliary detection pulse is changed to an alternating pulse and output to the motor.
- FIGS. 57 (a) to 57 (d) are drive voltage waveform diagrams of the ninth embodiment.
- the alternating pulse shown in Fig. 57 (a) is an alternating pulse formed by a detection auxiliary pulse PaX applied in the opposite direction to the main drive pulse and a detection auxiliary pulse PaY applied in the same direction as the main drive pulse. It is an example of a pulse.
- the alternation pulse shown in FIG. 57 (b) is an example of the alternation / ° pulse in which the detection auxiliary pulses P aX and P aY are intermittently applied.
- the alternating pulse shown in Fig. 57 (c) is an example of an alternating pulse in which the application order of the detection auxiliary pulses PaX and PaY is reversed from that of the alternating pulse shown in (a).
- the alternating pulse shown in Fig. 57 (d) is obtained by applying a plurality of detection auxiliary pulses PaX, for example, PaX1 and PaX2 to the step motor, and then applying the detection auxiliary pulse PaY to the step motor.
- a plurality of detection auxiliary pulses PaX for example, PaX1 and PaX2
- the detection auxiliary pulse PaY to the step motor.
- the same effect can be obtained even when the number of detection auxiliary pulses PaY is plural.
- the effects of the invention will be described for each embodiment.
- the voltage induced in the coil of step mode 7 is converted into a transient voltage by the detection circuit 6, and the rotation of the step motor is electrically detected and determined.
- a detection auxiliary pulse generation circuit 1 that generates a detection auxiliary pulse signal is provided on the circuit, and as an effective power pulse from the drive circuit 5, after the main drive pulse is cut off and before rotation detection.
- the stepping motor driving means applies a detection auxiliary pulse to the stepping motor 7.
- a pulse is applied to the stepping motor, it is possible to avoid output of a correction driving pulse due to erroneous determination operation of the detection circuit due to a decrease in the induced voltage, and it is possible to supply the necessary minimum effective power to the stepping motor.
- a detection auxiliary pulse output selection circuit 10 for selecting whether or not to output a detection auxiliary pulse is provided on the circuit of Embodiment 1 according to the output result of the detection circuit 6 obtained in the previous step operation.
- An electronic timepiece configured to output the detection / capture pulse before detecting the rotation of the rotor and to control the presence or absence of the output has the following effects.
- a detection auxiliary pulse width variable circuit 11 for varying the pulse width of the detection auxiliary pulse is provided.
- An electronic timepiece configured to output a detection assisting pulse before detecting the rotation of the rotor and to vary the pulse width thereof has the following effects.
- the detection auxiliary pulse output counter 12 for counting the output of the detection auxiliary pulse was provided on the circuit of the second embodiment.
- An electronic timepiece having such a configuration is provided with a wheel train mechanism that periodically generates a load torque to a motor, for example, a calendar having a jump control spring that elastically controls and adjusts a tooth tip of a date indicator as a date display plate. It is effective for clocks.
- a detection auxiliary pulse output timing generation circuit 13 that varies the output start timing of the detection auxiliary pulse according to the output result of the detection circuit 6 obtained in the previous step operation is provided.
- An electronic timepiece configured to output a detection auxiliary pulse before performing such rotation detection of the rotor and to further vary the pulse width is provided by:
- the output of the detection auxiliary pulse can be adjusted to a timing that easily amplifies the rotational motion of the rotor, which is effective in maintaining a stable rotation detection result at all times.
- a main drive pulse generation circuit 3 for generating a plurality of main drive pulse signals is provided on the circuit of the first embodiment, and (a) a detection auxiliary pulse output selection circuit 1 for selecting whether or not to output a detection auxiliary pulse 0, (b) the detection auxiliary pulse width variable circuit 11 that changes the pulse width of the detection auxiliary pulse, and (c) the detection auxiliary pulse output timing generation circuit 13 that changes the output start timing of the detection auxiliary pulse As a method of responding, by corresponding to the signal of the main drive pulse generation circuit 3,
- the alternating pulse has the effect of increasing the induced voltage necessary for detecting the rotation of the rotor (depending on the pulse P aX), and the turbulence of the rotor (the rotor rotates to the next stationary angle after the normal stationary angle is overrun). (Pulse P a Y). Rotor upset occurs when the drive voltage of the motor is high (power supply holding a high voltage such as a lithium battery). Availability of industrial articles
- the detection and assisting pulse of the present invention exerts a great effect on the step motor requiring low current consumption and high detection accuracy in the current step motor parts which are becoming smaller and thinner. .
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Control Of Stepping Motors (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51587294A JP3299756B2 (ja) | 1993-01-18 | 1994-01-12 | 電子時計 |
DE69413668T DE69413668T2 (de) | 1993-01-18 | 1994-01-12 | Zeitgeber |
US08/302,923 US5550795A (en) | 1993-01-18 | 1994-01-12 | Electronic timepiece and a method of driving a stepping motor of electronic timepiece |
EP94904307A EP0679967B1 (en) | 1993-01-18 | 1994-01-12 | Electronic timepiece |
Applications Claiming Priority (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5/6163 | 1993-01-18 | ||
JP616393 | 1993-01-18 | ||
JP2431193 | 1993-02-12 | ||
JP5/24311 | 1993-02-12 | ||
JP5/44182 | 1993-03-04 | ||
JP4418293 | 1993-03-04 | ||
JP5/51111 | 1993-03-11 | ||
JP5111193 | 1993-03-11 | ||
JP6712793 | 1993-03-25 | ||
JP5/67127 | 1993-03-25 | ||
JP5/87660 | 1993-04-14 | ||
JP8766093 | 1993-04-14 | ||
JP24820493 | 1993-10-04 | ||
JP5/248204 | 1993-10-04 |
Publications (1)
Publication Number | Publication Date |
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WO1994016365A1 true WO1994016365A1 (en) | 1994-07-21 |
Family
ID=27563345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/000030 WO1994016365A1 (en) | 1993-01-18 | 1994-01-12 | Electronic timepiece |
Country Status (6)
Country | Link |
---|---|
US (1) | US5550795A (ja) |
EP (1) | EP0679967B1 (ja) |
JP (1) | JP3299756B2 (ja) |
CN (1) | CN1056243C (ja) |
DE (1) | DE69413668T2 (ja) |
WO (1) | WO1994016365A1 (ja) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3508444B2 (ja) * | 1997-02-07 | 2004-03-22 | セイコーエプソン株式会社 | ステッピングモーターの制御装置、その制御方法および計時装置 |
DE10314426B4 (de) * | 2003-03-31 | 2006-09-14 | Junghans Uhren Gmbh | Verfahren zur Dreherkennung eines wenigstens einen Zeiger einer Uhr antreibenden Schrittmotors |
WO2005119377A1 (ja) * | 2004-06-04 | 2005-12-15 | Seiko Instruments Inc. | アナログ電子時計及びモータ制御回路 |
JP2006226927A (ja) * | 2005-02-21 | 2006-08-31 | Seiko Instruments Inc | ステップモータ駆動装置及びアナログ電子時計 |
JP5363167B2 (ja) * | 2008-05-29 | 2013-12-11 | セイコーインスツル株式会社 | ステッピングモータ制御回路及びアナログ電子時計 |
US8111033B2 (en) * | 2008-06-17 | 2012-02-07 | Seiko Instruments Inc. | Stepping motor control circuit and analog electronic timepiece |
JP2010145106A (ja) * | 2008-12-16 | 2010-07-01 | Seiko Instruments Inc | ステッピングモータ制御回路及びアナログ電子時計 |
JP5363269B2 (ja) * | 2008-12-25 | 2013-12-11 | セイコーインスツル株式会社 | ステッピングモータ制御回路及びアナログ電子時計 |
JP2010151641A (ja) * | 2008-12-25 | 2010-07-08 | Seiko Instruments Inc | ステッピングモータ制御回路及びアナログ電子時計 |
JP2011075463A (ja) * | 2009-09-30 | 2011-04-14 | Seiko Instruments Inc | ステッピングモータ制御回路及びアナログ電子時計 |
JP2011101576A (ja) * | 2009-10-06 | 2011-05-19 | Seiko Instruments Inc | ステッピングモータ制御回路及びアナログ電子時計 |
JP2011169650A (ja) * | 2010-02-16 | 2011-09-01 | Seiko Instruments Inc | ステッピングモータ制御回路及びアナログ電子時計 |
CN108027585B (zh) * | 2015-09-09 | 2020-10-23 | 西铁城时计株式会社 | 双线圈步进电机用驱动电路 |
JP2017163766A (ja) | 2016-03-11 | 2017-09-14 | カシオ計算機株式会社 | ステッピングモータ駆動装置、ステッピングモータの駆動方法、ステッピングモータ駆動プログラム、及び電子時計 |
JP7242306B2 (ja) * | 2019-01-11 | 2023-03-20 | セイコーインスツル株式会社 | 時計及び時計用モータ制御方法 |
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JPS5866089A (ja) * | 1981-10-15 | 1983-04-20 | Seikosha Co Ltd | 電子時計 |
JPS6128317B2 (ja) * | 1978-10-04 | 1986-06-30 | Seiko Denshi Kogyo Kk | |
JPH0222098U (ja) * | 1988-07-26 | 1990-02-14 | ||
JPH0326355B2 (ja) * | 1982-02-08 | 1991-04-10 | Seiko Epson Corp |
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JPS5319944B2 (ja) * | 1971-09-25 | 1978-06-23 | ||
JPS5345575A (en) * | 1976-10-06 | 1978-04-24 | Seiko Epson Corp | Electronic wristwatch |
CH644983GA3 (ja) * | 1981-03-31 | 1984-09-14 | ||
DE3214543A1 (de) * | 1981-04-23 | 1982-11-11 | Kabushiki Kaisha Suwa Seikosha, Tokyo | Elektronische analoguhr |
US4477196A (en) * | 1981-05-07 | 1984-10-16 | Kabushiki Kaisha Suwa Seikosha | Analog electronic timepiece |
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1994
- 1994-01-12 EP EP94904307A patent/EP0679967B1/en not_active Expired - Lifetime
- 1994-01-12 DE DE69413668T patent/DE69413668T2/de not_active Expired - Fee Related
- 1994-01-12 WO PCT/JP1994/000030 patent/WO1994016365A1/ja active IP Right Grant
- 1994-01-12 JP JP51587294A patent/JP3299756B2/ja not_active Expired - Lifetime
- 1994-01-12 US US08/302,923 patent/US5550795A/en not_active Expired - Lifetime
- 1994-01-12 CN CN94191390.2A patent/CN1056243C/zh not_active Expired - Fee Related
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JPS6128317B2 (ja) * | 1978-10-04 | 1986-06-30 | Seiko Denshi Kogyo Kk | |
JPS5866089A (ja) * | 1981-10-15 | 1983-04-20 | Seikosha Co Ltd | 電子時計 |
JPH0326355B2 (ja) * | 1982-02-08 | 1991-04-10 | Seiko Epson Corp | |
JPH0222098U (ja) * | 1988-07-26 | 1990-02-14 |
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Also Published As
Publication number | Publication date |
---|---|
DE69413668D1 (de) | 1998-11-05 |
CN1119043A (zh) | 1996-03-20 |
EP0679967A4 (en) | 1997-02-26 |
DE69413668T2 (de) | 1999-04-15 |
EP0679967B1 (en) | 1998-09-30 |
JP3299756B2 (ja) | 2002-07-08 |
EP0679967A1 (en) | 1995-11-02 |
US5550795A (en) | 1996-08-27 |
CN1056243C (zh) | 2000-09-06 |
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