Stepping motor steering circuit and analog electronic timer
A stepping motor and control circuit technology, applied in the direction of motor generator control, control system, electromechanical clock, etc., can solve the problems of difficult induction signal drive pulse control, peak voltage increase, etc., to achieve design flexibility, restraint Excessive pulse boost control to achieve the effect of current consumption
Active Publication Date: 2010-06-30
SEIKO INSTR INC
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Problems solved by technology
[0005] However, there is a problem that the time of the day when the peak of the induced signal appears due to the free vibration of the rotor is affected by gear train load fluctuations, and the change in the peak voltage increases in proportion to the elapsed time
[0006] Since the variation of the load exists in the individual movement, there arises a problem that it is difficult to perform stable drive pulse control based on the peak occurrence time of the induced signal
Method used
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[0032] figure 1 is a block diagram of an analog electronic timepiece using a motor control circuit showing an example of an analog electronic wrist timepiece according to an embodiment of the present invention.
[0033] This embodiment of the present invention is briefly described. The induced signal generated by the rotation of the stepping motor is generated due to the vibration of the rotor after stopping the driving pulse. The timing at which the induced signal is generated in the rotation detection intervals T1a and T1b of the initial vibration immediately after the drive pulse is stopped is characterized by being limited from a state of being driven to rotate without any retention capability (almost stopped) to having retention capability A range of states that are driven to a degree that does not occur when there is sufficient remaining rotational capacity.
[0034] In consideration of this characteristic, by performing pulse control based on the induced signals gener...
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The invention relates to a stepping motor steering circuit and an analog electronic timer. When the main drive pulse is used to drive the stepping motor to rotate, if the inducing signal exceeding the benchmark threshold voltage is only detected in the third region, the pulse reduction operation is executed, when the inducing signals exceeding the benchmark threshold voltage are detected in both the first and the third regions, the main drive pulse should not been changed. When the inducing signals exceeding the benchmark threshold voltage are detected in both the second and the third regions, the gradation hoisting operation is executed without correcting the drive pulse to execute the drive, when the signals exceeding the benchmark threshold voltage are at least detected in the e third region, the gradation hoisting operation is executed after correcting the drive of the drive pulse.
Description
technical field [0001] The present invention relates to a stepping motor control circuit and an analog electronic timepiece utilizing the stepping motor control circuit. Background technique [0002] In the prior art, in analog electronic timing devices, etc., a stepping motor is used, which includes a stator having a rotor storage hole and a positioning portion for determining the stop position of the rotor, and is arranged on the rotor storage hole. A rotor in the hole, and a coil, wherein the stator generates magnetic flux by supplying an alternating signal to the coil to rotate and stop the rotor at a position corresponding to the positioning portion. [0003] A method employed as a method of controlling a stepping motor is a correction drive system in which, when the stepping motor is driven by the main drive pulse, it is detected by detecting an induced signal corresponding to an induced voltage generated in the stepping motor Whether the stepping motor is rotating, a...
Claims
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Inventor 间中三郎高仓昭小笠原健治佐久本和实加藤一雄本村京志长谷川贵则山本幸祐清水洋
Owner SEIKO INSTR INC