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Stepping motor control circuit and analog electronic timepiece

A stepper motor and control circuit technology, applied in motor generator control, electromechanical clocks, clocks, etc., can solve problems such as the time to reach over-discharge voltage, and the consumption of secondary battery surge, avoid driving, restrain energy, etc. The effect of consumption

Inactive Publication Date: 2012-11-14
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the consumption of the secondary battery increases rapidly and the time to reach the overdischarge voltage is advanced.

Method used

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  • Stepping motor control circuit and analog electronic timepiece
  • Stepping motor control circuit and analog electronic timepiece
  • Stepping motor control circuit and analog electronic timepiece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] figure 1 It is a block diagram of an analog electronic timepiece using a stepping motor control circuit according to an embodiment of the present invention, and is a block diagram common to the first to fifth and eighth to eleventh embodiments, showing an example of the analog electronic timepiece.

[0031] exist figure 1 Among them, the analog electronic timepiece has: an oscillating circuit 101, which generates a signal of a predetermined frequency; a frequency division circuit 102, which divides the frequency of the signal generated by the oscillating circuit 101, and generates a clock signal as a timing reference; and a control circuit 103, which Various controls such as timing operation of the clock signal, control of each electronic circuit element constituting the analog electronic timepiece, and change control of drive pulses are performed.

[0032] In addition, the analog electronic timepiece has: a main drive pulse generation circuit 104 that selects and outp...

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PUM

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Abstract

A voltage detection circuit detects a voltage of a secondary cell (113) that powers a stepping motor (108). A rotation detection circuit detects a rotation state of the stepping motor, and a control unit selects a main driving pulse for driving the stepping motor based on the detected rotation state from plural kinds of driving pulses having different energies. An analog display unit (109) announces that the voltage of the secondary cell becomes a predetermined reference voltage when the voltage detection circuit (112) odetects that the voltage of the secondary cell becomes the predetermined reference voltage. When the control unit selects a predetermined main driving pulse (P1k) before the voltage detection circuit detects that the voltage of the secondary cell becomes a current reference voltage, the control unit sets the reference voltage to the predetermined reference voltage higher than the current reference voltage.

Description

technical field [0001] The invention relates to a step motor control circuit using a secondary battery as a power source and an analog electronic clock using the step motor control circuit. Background technique [0002] Conventionally, an analog electronic timepiece using a secondary battery as a power source and charging the secondary battery by a power generating unit such as a solar cell has been developed. A conventional analog electronic timepiece having a power generating unit prepares multiple types of motor drive pulses with mutually different energies, and switches the motor drive pulses according to the detected voltage of a secondary battery (for example, refer to Patent Document 1). [0003] Also, when the detected voltage of the secondary battery is the over-discharge voltage, the voltage of the secondary battery approaches the lower limit of the driving voltage that can rotate the motor, and if this state continues, the motor may not be able to be driven. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P8/02G04C3/14
CPCH02P8/02H02P8/16G04C3/143G04C10/02
Inventor 小笠原健治福嶋俊隆间中三郎高仓昭清水洋佐久本和实本村京志山本幸祐
Owner SEIKO INSTR INC