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1. 发明专利

JPH06190180A DEVICE AND METHOD FOR CONTROLLING SEWING MACHINE 失效
公开(公告)号：JPH06190180A
公开(公告)日：1994-07-12
申请号：JP23024693
申请日：1993-09-16
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAUCHI SATOMI , YAMADA HIROSHI , TSUKAHARA HISAAKI , GODA TOKI
IPC分类号： D05B69/18 , D05B69/22 , H02P3/26
摘要： PURPOSE:To facilitate piercing into cloth at the time of the next sewing by rotating a sewing machine by an inching angle by a motor, stopping immediately before the cloth, adjusting a position where a needle is pierced into the cloth, and subsequently, rotating backward the motor. CONSTITUTION:The device is provided with a motor 2 for driving a sewing machine 1, a sewing machine control circuit 520 for controlling the motor 2, a needle position detector 3 for detecting a needle position of the sewing machine 1, an inching angle setting circuit 30 for setting an inching angle of the sewing machine 1, and an inching angle rotating means for rotating forward the sewing machine 1 at an inching angle set by the inching angle circuit 30 by inputting an inching signal S4 to the sewing machine control circuit 520.

2. 发明专利

JPS6458294A DRIVING UNIT IN SEWING MACHINE 失效
公开(公告)号：JPS6458294A
公开(公告)日：1989-03-06
申请号：JP21546587
申请日：1987-08-31
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAUCHI SATOMI
IPC分类号： D05B69/26 , D05B69/20 , D05B69/36
摘要： PURPOSE: To provide a sewing machine driving device for not shifting a position even after stopping a sewing machine by turning the signal of a speed setting means to zero during the stoppage of the sewing machine. CONSTITUTION: When operation signals are turned on at the time t1 , for a speed setting means 33, by a speed command selection means 34, speed command signals 31 are selected and the sewing machine is rotated. Then, when the operation signals are turned off at the time t2 , the speed command signals 31 are switched to a positioning speed, position deviation output 32 is added to the speed setting means 33 by the speed command selection means 34 and positioning is performed at the time of reaching a target position to stop at the time t3 . After the time t4 , a speed zero command is added to the speed setting means 33 by the speed command selection means 34 and control is performed so as to turn the speed at the time of sewing machine stoppage to zero. Also, by a current command selection means 41, by switching to a second speed amplifier 39 after the time t4 , sound generated by a motor 2 at the time of the stoppage is reduced. On the other hand, in the case of manually rotating a sewing machine pulley 12, turning is made possible and also smooth turning is made possible.

3. 发明专利

JPS63171586A TWO-NEEDLE STITCH APPARATUS 失效
公开(公告)号：JPS63171586A
公开(公告)日：1988-07-15
申请号：JP282487
申请日：1987-01-09
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAUCHI SATOMI
IPC分类号： D05B55/16 , D05B69/20

4. 发明专利

JPS62272866A POWER CIRCUIT 失效
公开(公告)号：JPS62272866A
公开(公告)日：1987-11-27
申请号：JP11265586
申请日：1986-05-19
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAMOTO SHOKO , KUMAGAI HIROSHI , YAMAUCHI SATOMI , OKAJI HIROAKI
IPC分类号： H02M3/28
摘要： PURPOSE:To miniaturize and lighten a transformer by supplying an electric power from an auxiliary power transformer, only when a power supply is inputted, so as to start a switching action. CONSTITUTION:A switching control power circuit is composed of a rectifier circuit 2 and a smoothing capacitor 3 of an AC power 1, a switching circuit 4, a spike voltage absorbing circuit 5, a transformer 6, a pulse transformer 7, a rectification smoothing circuit 8, a control circuit 9, an auxiliary power transformer 10 and others. In the rectification smoothing circuit 15 connected with an auxiliary power transformer 10 output side, a diode element 16 connected between the rectifier circuit and the smoothing capacitor 18 and a diode element 17 connected between the capacitor 18 and output terminals 12-13 are connected in series with polarities reverse to each other to form an OR circuit and their common junction (a capacitor 18 voltage) is connected with the control circuit 9. In this manner, electricity is supplied from the auxiliary power transformer 10 only when a power supply is inputted and once the power supply is driven, said transformer 10 discontinues its participation.

5. 发明专利

JPS62133994A CONTROLLER OF SEWING MACHINE 失效
公开(公告)号：JPS62133994A
公开(公告)日：1987-06-17
申请号：JP27200585
申请日：1985-12-03
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAUCHI SATOMI
IPC分类号： D05B69/20 , D05B69/10 , D05B69/36

6. 发明专利

JPS6253698A TWIN NEEDLE STITCH APPARATUS 失效
公开(公告)号：JPS6253698A
公开(公告)日：1987-03-09
申请号：JP19420985
申请日：1985-09-03
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMAUCHI SATOMI
IPC分类号： D05B55/16 , D05B69/20

7. 发明专利

JPS61124295A Inverter 失效
标题翻译：逆变器
公开(公告)号：JPS61124295A
公开(公告)日：1986-06-12
申请号：JP24486484
申请日：1984-11-20
申请人： Mitsubishi Electric Corp
发明人： NAKAMURA TAKASHI , GODA TOKI , KUMAGAI HIROSHI , YAMAUCHI SATOMI
IPC分类号： H02P27/06
CPC分类号： H02P27/06 , H02P27/047
摘要： PURPOSE:To prevent a rotary load from reducing its acceleration force at rising time by setting rated voltage and frequency characteristic lower than the voltage of V/f pattern in a frequency corresponding to the normal rotating speed. CONSTITUTION:In an inverter 1 of a motor 2 for driving a load such as a sewing machine 3, a motor 7 is driven by the output of the inverter 1 at constant V/f ratio the frequency corresponding to the normal speed of the machine 3, and the rated voltage/frequency characteristic of the motor is set to the voltage lower than the V/f pattern in the frequency corresponding to the normal speed. Thus, since the magnetic flux density increases in the amount corresponding to the voltage difference between the V/f pattern (solid line C) and the motor characteristic (broken line D), the output torque rises as the frequency increases. Accordingly, the rising characteristics of the machine 3 becomes efficient without reduction in the acceleration force.
摘要翻译：目的：通过将额定电压和频率特性设置为低于对应于正常转速的频率的V / f图形的电压来防止旋转负载在上升时间减小其加速力。构成：在用于驱动缝纫机3等负载的电动机2的逆变器1中，马达7由变频器1的输出以恒定的V / f比驱动，与机器3的正常速度对应的频率，并且电机的额定电压/频率特性设定为低于对应于正常速度的频率的V / f图案的电压。因此，由于磁通密度以对应于V / f图案（实线C）和电动机特性（虚线D）之间的电压差的量增加），所以输出转矩随频率增加而上升。因此，不会降低加速力，机器3的上升特性变得有效。

8. 发明专利

JPS61122894A Sewing apparatus 失效
公开(公告)号：JPS61122894A
公开(公告)日：1986-06-10
申请号：JP24486584
申请日：1984-11-20
申请人： Mitsubishi Electric Corp
发明人： NAKAMURA TAKASHI , GODA TOKI , KUMAGAI HIROSHI , YAMAUCHI SATOMI
IPC分类号： D05B65/02 , D05B69/26

9. 发明专利

JPS61106083A Inverter device 失效
标题翻译：逆变器装置
公开(公告)号：JPS61106083A
公开(公告)日：1986-05-24
申请号：JP22720984
申请日：1984-10-29
申请人： Mitsubishi Electric Corp
发明人： NAKAMURA TAKASHI , GODA TOKI , KUMAGAI HIROSHI , YAMAUCHI SATOMI
IPC分类号： H02P27/06 , H02M7/48 , H02P27/04
CPC分类号： H02P27/06
摘要： PURPOSE:To obtain rising characteristic having good response even when a load is desired to be rapidly risen by supplying a high voltage to a motor when the operating speed of an operating member is fast. CONSTITUTION:When a foot pedal 5 is pressed slower than the set value in an inverter 1 for driving a 3-phase induction motor 6 of a sewing machine 3, the output of a comparator 10 becomes L level, the switch of a winding converter 11 is not operated, and the motor windings become Y-connection. When the pedal 5 is, on the contrary, pressed faster than the set value, the output of the comparator 10 changes to H level, the switch of the converter 11 is operated so that the windings become delta-connection. Thus, the voltages applied to the windings increases to 3 times of that of the Y-connection. On the other hand, the output torque of the motor increases proportionally to the square of the voltage applied to the winding. Accordingly, the output torque of three times of that is obtained as compared with the conventional Y-connection, thereby providing good response in the rising characteristic of the machine 3.
摘要翻译：目的：为了获得具有良好响应的上升特性，即使当操作构件的操作速度快时，当通过向电动机提供高电压而希望快速上升负载时。构成：在用于驱动缝纫机3的三相感应电动机6的逆变器1中按压比脚踏板5慢的情况下，比较器10的输出变为L电平，绕组变换器11的开关电机绕组变为Y型连接。相反，当踏板5按压比设定值更快时，比较器10的输出变为H电平，转换器11的开关被操作，使得绕组变为三角形连接。因此，施加到绕组的电压增加到Y形连接的电压的3 1/2倍。另一方面，电动机的输出转矩与施加到绕组的电压的平方成比例地增加。因此，与常规的Y形连接相比，获得三倍的输出转矩，从而在机器3的上升特性中提供良好的响应。

10. 发明专利

JPS61106082A Inverter device 失效
标题翻译：逆变器装置
公开(公告)号：JPS61106082A
公开(公告)日：1986-05-24
申请号：JP22720884
申请日：1984-10-29
申请人： Mitsubishi Electric Corp
发明人： NAKAMURA TAKASHI , GODA TOKI , KUMAGAI HIROSHI , YAMAUCHI SATOMI
IPC分类号： H02P25/04 , H02M7/48 , H02P27/04 , H02P27/06
CPC分类号： H02P27/06
摘要： PURPOSE:To prevent a switching element from damaging due to the stepout of a motor or the overcurrent of an inverter even if the operating speed of an operating member is accelerated by providing suppressing means for suppressing the change rate of the output of operation amount detecting means to the prescribed value or lower. CONSTITUTION:In an inverter 1 for driving the induction motor 2 of a sewing machine 3, suppressing means 7 is provided in the intermediate between a pedal detector 5 and an inverter controller 4. Thus, even if a foot pedal 6 is pressed at any speed, the output V from the detector 5 is input to the controller 4 at the change rate of the prescribed value or lower, and the output frequency from the inverter 1 is not raised more than the prescribed time or earlier. Accordingly, the motor 2 can readily follows the increase of the output frequency, thereby preventing a switching element from damaging due to the stepout of the motor 2 or the overcurrent of the inverter 1.
摘要翻译：目的：为了防止开关元件由于电动机的退出或逆变器的过电流而损坏，即使通过提供用于抑制操作量检测装置的输出的变化率的抑制装置来加速操作构件的操作速度达到规定值以下。构成：在用于驱动缝纫机3的感应电机2的逆变器1中，在踏板检测器5和逆变器控制器4之间的中间设置有抑制单元7.因此，即使以任何速度按压脚踏板6 ，来自检测器5的输出V以规定值以下的变化率输入到控制器4，并且来自逆变器1的输出频率不会超过规定时间以上。因此，马达2可以容易地跟随输出频率的增加，从而防止开关元件由于电动机2的退出或逆变器1的过电流而损坏。

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