JPH031699U

JPH031699U -

Info

Publication number: JPH031699U
Application number: JP5744989U
Authority: JP
Priority date: 1989-05-18
Filing date: 1989-05-18
Publication date: 1991-01-09
Anticipated expiration: 2004-05-18
Also published as: JPH0733598Y2

Description

[Brief explanation of drawings]

第１図は本考案の第１の実施例に係わるステツ
ピングモータ装置の回路図、第２図はステツピン
グモータの固定子と回転子を示す第３図の−
線に相当する部分の断面図、第３図は第２図の
−線に相当する部分の断面図、第４図は第１図
の制御回路を詳しく示す回路図、第５図は第１図
の各部の電圧波形図、第６図は第４図の第１〜第
３のコンデンサを省いた状態における第４図の各
部の波形図、第７図は基準電圧の変化を示す波形
図、第８図は第２の実施例のステツピングモータ
装置を示す回路図である。１…電源、２ａ，２ｂ，２ｃ，２ｄ…巻線、３
ａ，３ｂ，３ｃ，３ｄ…スイツチング素子、４ａ
，４ｂ…電流検出抵抗、６ａ，６ｂ…制御回路、
７…励磁信号発生回路、１０…基準電圧回路、Ｃ
１，Ｃ２，Ｃ３…第１、第２及び第３のコンデン
サ、Ｓ１，Ｓ２…電流制御用スイツチング素子。 FIG. 1 is a circuit diagram of a stepping motor device according to a first embodiment of the present invention, and FIG. 2 is a diagram showing the stator and rotor of the stepping motor.
3 is a sectional view of a portion corresponding to the line in FIG. 2, FIG. 4 is a circuit diagram showing the control circuit in FIG. 1 in detail, and FIG. Figure 6 is a waveform diagram of each part in Figure 4 with the first to third capacitors in Figure 4 omitted; Figure 7 is a waveform diagram showing changes in the reference voltage; FIG. 8 is a circuit diagram showing the stepping motor device of the second embodiment. 1... Power supply, 2a, 2b, 2c, 2d... Winding wire, 3
a, 3b, 3c, 3d... switching element, 4a
, 4b... current detection resistor, 6a, 6b... control circuit,
7... Excitation signal generation circuit, 10... Reference voltage circuit, C
1, C2, C3...first, second and third capacitors, S1, S2...switching element for current control.

Claims

[Claims for Utility Model Registration] (1) First and second windings connected between one end and the other end of a direct current source, respectively, and connected in series to the first and second windings, respectively. the first and second switching elements, and a first switch indicating the excitation period of the first and second windings.
and a second excitation signal generating circuit that generates a second excitation signal having temporally overlapping periods, and a first and second excitation signal generating circuit for detecting the current flowing through the first and second windings, respectively. a current detector; a reference voltage circuit having first and second reference voltage terminals; and a reference voltage circuit having one input terminal connected to the first reference voltage terminal and connected to the first current detector. the other input terminal, and compares a first reference voltage applied from the first reference voltage terminal with a first detection voltage applied from the first current detector, and a first comparator that outputs a signal indicating the point in time when the current flowing through the winding reaches the first reference voltage; and on/off control of the first switching element based on the output of the first comparator. a first control pulse generation circuit that generates a first control pulse to generate the first control pulse at a cycle shorter than the first excitation signal; and a first control pulse generation circuit that generates the first control pulse obtained from the first control pulse generation circuit. a first gate circuit that applies a signal to the first switching element during a period determined by the first excitation signal; and one input terminal connected to the second reference voltage terminal; It has the other input terminal connected to a current detector, and has a second reference voltage given from the second reference voltage terminal and a second detection voltage given from the second current detector. a second comparator that compares and outputs a signal indicating a point in time when the current flowing through the second winding reaches the second reference voltage; and a second switching circuit based on the output of the second comparator. a second control pulse generation circuit that generates a second control pulse for controlling on/off of the element at a shorter period than the second excitation signal; a second gate circuit that applies a second control pulse to the second switching element during a period determined by the second excitation signal; and one input terminal and the other input terminal of the first comparator. A stepping motor device comprising: a first capacitor connected between the first and second capacitors; and a second capacitor connected between one input terminal and the other input terminal of the second comparator. (2) The stepping motor device according to claim 1, further comprising a third capacitor connected between one input terminal of the first and second coparators. (3) first and second windings connected between one end and the other end of the DC power supply, respectively, and first and second windings connected in series with the first and second windings, respectively; a switching element for determining an excitation period; a first switching element indicating an excitation period of the first and second windings;
and an excitation signal generation circuit that generates a second excitation signal with temporally overlapping periods and supplies the first and second excitation signals to the first and second excitation period determining switching elements, respectively. and first and second current control switching elements connected in series to the first and second windings, respectively, for detecting the current flowing through the first and second windings, respectively. a reference voltage circuit having first and second current detectors; a reference voltage circuit having one input terminal connected to the first reference voltage terminal; the other input terminal connected to the first current detector, a first reference voltage given from the first reference voltage terminal and a first detection voltage given from the first current detector; a first comparator that outputs a signal indicating a point in time when the current flowing through the first winding reaches the first reference voltage by comparing the current with the first reference voltage; a first control pulse generation circuit that generates a first control pulse for on/off control of a current control switching element at a cycle shorter than the first excitation signal; has one input terminal connected to the second current detector, and has the other input terminal connected to the second current detector, and has a second reference voltage applied from the second reference voltage terminal and the second current detector. a second comparator that outputs a signal indicating the point in time when the current flowing through the second winding reaches the second reference voltage by comparing the voltage with a second detection voltage given from the current detector; a second control that generates a second control pulse for controlling on/off of the second current control switching element based on the output of the second comparator at a cycle shorter than the first excitation signal; a pulse generation circuit; a first capacitor connected between one input terminal and the other input terminal of the first comparator; and one input terminal and the other input terminal of the second comparator. and a second capacitor connected between. (4) The stepping motor device according to claim 3, further comprising a third capacitor connected between one input terminal of the first and second comparators.