-
公开(公告)号：US4291265A
公开(公告)日：1981-09-22
申请号：US89735
申请日：1979-10-31
申请人： Shigeki Kawada , Hiroshi Ishida , Keiji Sakamoto
发明人： Shigeki Kawada , Hiroshi Ishida , Keiji Sakamoto
IPC分类号： H02H7/08 , H02H7/10 , H02H7/122 , H02H9/02 , H02M7/48 , H02M7/537 , H02P27/06 , H02P27/16 , H02P5/40
CPC分类号： H02M7/53875 , H02H7/0833 , H02H9/02
摘要： The invention relates to a speed control system which includes an inverter circuit for converting a direct current into a polyphase alternating current in the form of a rectangular wave by the switching action of transistors, and an inverter drive circuit adapted to apply control signals to the inverter circuit to bring its output frequency to a desired value, an AC motor being rotated by the alternating current supplied by the inverter circuit. The system features current detection means for detecting the current that flows thrugh the input side of the inverter circuit, and a circuit adapted to terminate the operation of the inverter circuit when the value detected by the current means approaches a value large enough to damage the inverter circuit transistors as at such time that a large momentary current is subjected thereto. Also provided is protective circuitry with a current-limiting function adapted to suppress an increase in the output current of the inverter circuit and limit this current to a stable value without terminating the operation of the inverter circuit at such time that the current continuously flowing into the transistors of the inverter circuit is about to flow to its output side at an increased magnitude that could damage the transistors.
摘要翻译： 本发明涉及一种速度控制系统，其包括用于通过晶体管的开关动作将直流转换为矩形波形式的多相交流电的逆变器电路，以及适用于向逆变器施加控制信号的逆变器驱动电路 电路使其输出频率达到期望值，交流电动机由逆变器电路提供的交流电转动。 该系统具有用于检测逆变器电路的输入侧流动的电流的电流检测装置，以及当由当前装置检测到的值接近到足以损坏逆变器的值时适于终止逆变器电路的操作的电路 在这样的时刻，大的瞬时电流被施加到电路晶体管。 还提供了具有限流功能的保护电路，其适于抑制逆变器电路的输出电流的增加，并将该电流限制在稳定的值，而不会在不停止逆变器电路的操作的情况下将电流连续流入 逆变器电路的晶体管将以可能损坏晶体管的增加的幅度流到其输出侧。
-
公开(公告)号：US4482854A
公开(公告)日：1984-11-13
申请号：US433103
申请日：1982-10-06
申请人： Shigeki Kawada , Hiroshi Ishida , Shinichi Kouno
发明人： Shigeki Kawada , Hiroshi Ishida , Shinichi Kouno
摘要： An inverter circuit having a bridge circuit comprising a plurality of switching elements connected in the form of a bridge for converting, into alternating current, a DC voltage produced by a DC voltage generating unit and which is received through a first switching circuit. The inverter circuit includes a pair of diodes and a spike absorbing capacitor which constitute a series network wherein the diodes are connected so as to be forward biased with respect to the DC voltage and the spike absorbing capacitor is connected between the diodes. The series network is connected in parallel with the bridge circuit and is connected to the DC voltage generating unit through the first switching circuit. The spike absorbing capacitor is connected in parallel with a smoothing capacitor of the DC voltage generating unit.
摘要翻译： 一种逆变器电路，具有桥式电路，该桥式电路包括以桥形式连接的多个开关元件，用于将由直流电压产生单元产生的直流电压转换为交流电流，并通过第一开关电路接收。 逆变器电路包括构成串联网络的一对二极管和尖峰吸收电容器，其中二极管相对于直流电压被正向偏置，并且尖峰吸收电容器连接在二极管之间。 串联网络与桥式电路并联连接，并通过第一开关电路连接到直流电压产生单元。 尖峰吸收电容器与直流电压产生单元的平滑电容器并联连接。
-
公开(公告)号：US4327315A
公开(公告)日：1982-04-27
申请号：US89739
申请日：1979-10-31
申请人： Shigeki Kawada , Hiroshi Ishida , Yutaka Koiwai
发明人： Shigeki Kawada , Hiroshi Ishida , Yutaka Koiwai
CPC分类号： H02P27/045 , H02P27/048 , H02P2207/01 , H02P27/047
摘要： Disclosed is an induction motor drive apparatus which brings the actual speed of an induction motor into coincidence with a command speed by varying the frequency and effective value of a three-phase AC voltage applied to the induction motor. The apparatus includes an inverter for generating three-phase AC voltage, a speed deviation signal generator, an amplitude controller for controlling the amplitude of the speed deviation signal, an adder for adding together a voltage signal which conforms to the actual speed and the speed deviation signal which has been controlled, a rectangular waveform signal generator, and a pulse width modulator. The rectangular waveform signal generator is adapted to produce a three-phase rectangular signal whose frequency is proportional to the output voltage value of the adder. The rectangular signal of each phase is modulated in pulse width on the basis of the speed deviation, the inverter being controlled by each resulting pulse-width modulated rectangular signal to thereby vary the effective value of the three-phase AC voltage.
摘要翻译： 公开了一种感应电动机驱动装置，其通过改变施加到感应电动机的三相交流电压的频率和有效值来使感应电动机的实际速度与指令速度一致。 该装置包括用于产生三相AC电压的逆变器，速度偏差信号发生器，用于控制速度偏差信号幅度的振幅控制器，用于将符合实际速度和速度偏差的电压信号相加的加法器 已被控制的信号，矩形波形信号发生器和脉冲宽度调制器。 矩形波形信号发生器适于产生频率与加法器的输出电压值成比例的三相矩形信号。 每个相位的矩形信号基于速度偏差以脉冲宽度调制，逆变器由每个得到的脉宽调制矩形信号控制，从而改变三相交流电压的有效值。
-
公开(公告)号：US4314191A
公开(公告)日：1982-02-02
申请号：US89741
申请日：1979-10-31
申请人： Shigeki Kawada , Hiroshi Ishida
发明人： Shigeki Kawada , Hiroshi Ishida
CPC分类号： H02M7/53875 , H02H7/0833 , H02H9/02
摘要： The invention relates to a speed control system which includes an inverter circuit for converting a direct current into a polyphase alternating current in the form of a rectangular wave by the switching action of transistors, and an inverter drive circuit adapted to apply control signals to the inverter circuit to bring its output frequency to a desired value, an induction motor being rotated by the alternating current supplied by the inverter circuit. The system features current detection means for detecting current that flows through the output side of the inverter circuit, and decision means for examining the output of the current detection means for a fixed period at a frequency higher than that at which the induction motor is driven. The decision means interrupts the operation of the inverter circuit when it has been judged that the current flowing through the outside thereof is greater than a prescribed value, and actuates the inverter circuit when the current flowing through the output side thereof is less than the prescribed value. The result is that the inverter circuit is allowed to operate intermittently at a current which does not exceed a prescribed value, whereby the induction motor runs continuously without any observable halt in operation.
摘要翻译： 本发明涉及一种速度控制系统，其包括用于通过晶体管的开关动作将直流转换为矩形波形式的多相交流电的逆变器电路，以及适用于向逆变器施加控制信号的逆变器驱动电路 电路使其输出频率达到期望值，感应电动机由逆变器电路提供的交流电转动。 该系统具有用于检测流过逆变器电路的输出侧的电流的电流检测装置，以及用于以高于感应电动机驱动频率的固定周期检查电流检测装置的输出的判定装置。 当判断出流经其外部的电流大于规定值时，决定装置中断逆变器电路的动作，并且在流过其输出侧的电流小于规定值时使逆变器电路动作 。 结果是允许逆变器电路以不超过规定值的电流间歇地运行，由此感应电动机连续运行而没有任何可观察到的停止运行。
-
公开(公告)号：US4370614A
公开(公告)日：1983-01-25
申请号：US172651
申请日：1980-07-28
申请人： Shigeki Kawada , Hiroshi Ishida
发明人： Shigeki Kawada , Hiroshi Ishida
CPC分类号： G01P13/045 , G01P3/488
摘要： A speed detector including a circular rotational member having a plurality of equally spaced-apart teeth on the outer circumference thereof, and first and second magnetic sensors. The first and second magnetic sensors each comprise a permanent magnet, a magnetic pole which permits the passage therethrough of a magnetic flux generated by the permanent magnet, and a detection coil wound on a portion of the magnetic pole. The magnetic poles of the first and second magnetic sensors are disposed in close proximity to, and arranged to face, the teeth on the rotational member, whereby each magnetic sensor produces an alternating output signal as the rotational member rotates, the frequency of each output signal being proportional to the speed of the rotational member. The direction in which the rotational member rotates can be detected by disposing the magnetic poles of the first and second magnetic detectors such that one of them is displaced circumferentially with respect to the other by an angular distance which is equivalent to 1/4 of the pitch of the teeth arrayed on the rotational member.
摘要翻译： 一种速度检测器，包括在其外圆周上具有多个等距间隔的齿的圆形旋转构件，以及第一和第二磁性传感器。 第一和第二磁传感器各自包括永磁体，磁极，其允许由永磁体产生的磁通的通过，以及卷绕在磁极的一部分上的检测线圈。 第一和第二磁性传感器的磁极设置在旋转构件上的齿附近并且面对面，由此每个磁性传感器在旋转构件旋转时产生交替的输出信号，每个输出信号的频率 与旋转构件的速度成比例。 旋转构件旋转的方向可以通过将第一和第二磁性检测器的磁极设置为使得它们中的一个相对于另一个相对于另一个相对于间距的1/4的角距离而周向地移位来检测 排列在旋转构件上的齿。
-
公开(公告)号：US4333042A
公开(公告)日：1982-06-01
申请号：US79500
申请日：1979-09-27
申请人： Shigeki Kawada , Hiroshi Ishida
发明人： Shigeki Kawada , Hiroshi Ishida
CPC分类号： H02P27/08 , H02P23/0027
摘要： A system for driving an alternate current motor including a pulse width modulation inverter having the two-range driving characteristics, wherein the motor is driven by the pulse width modulation output having a simulated sine wave form at the speed lower than the base speed of the motor and by the pulse width modulation output having a rectangular wave form at the speed higher than the base speed of the motor.
摘要翻译： 一种用于驱动交流电动机的系统，其包括具有双范围驱动特性的脉宽调制逆变器，其中电动机由具有模拟正弦波形式的脉冲宽度调制输出以低于电动机的基本速度的速度驱动 并且以比电动机的基本速度高的速度通过具有矩形波形的脉宽调制输出。
-
公开(公告)号：US4322671A
公开(公告)日：1982-03-30
申请号：US107088
申请日：1979-12-26
申请人： Shigeki Kawada , Hiroshi Ishida , Yutaka Koiwai
发明人： Shigeki Kawada , Hiroshi Ishida , Yutaka Koiwai
CPC分类号： H02P27/026
摘要： An induction motor drive apparatus brings the actual speed of an induction motor into coincidence with a command speed by varying the frequency and effective value of a three-phase AC voltage applied to the induction motor and limits the torque of the induction motor in the low speed region by controlling an amplitude of a speed deviation signal below a prescribed value. The apparatus includes an inverter for generating three-phase AC voltage, a speed deviation signal generator, a torque limit signal generator, an amplitude controller for controlling the amplitude of the speed deviation signal based on the presence of the torque limit signal, a slip signal generator which generates a slip signal having a positive or negative constant voltage conforming to the rotational direction of the induction motor, an adder for adding together a voltage signal which conforms to the actual speed and the slip signal, a rectangular waveform signal generator, a multiplier for multiplying an output of the amplitude controller by an output of the adder and a pulse width modulator. The rectangular waveform signal generator is adapted to produce a three-phase rectangular signal whose frequency is proportional to the output voltage value of the adder. The rectangular signal of each phase is modulated in pulse width on the basis of the speed deviation, the inverter being controlled by each resulting pulse-width modulated rectangular signal to thereby vary the effective value of the three-phase AC voltage and to make the speed of the induction motor constant.
摘要翻译： 感应电机驱动装置通过改变施加到感应电动机的三相AC电压的频率和有效值，使感应电动机的实际速度与指令速度一致，并将感应电动机的转矩限制在低速 通过将速度偏差信号的幅度控制在规定值以下。 该装置包括用于产生三相AC电压的逆变器，速度偏差信号发生器，转矩限制信号发生器，用于根据扭矩限制信号的存在来控制速度偏差信号的振幅的幅度控制器，滑移信号 发生器，其产生具有与感应电动机的旋转方向一致的正或负恒定电压的滑差信号，用于将符合实际速度的电压信号和滑差信号相加的加法器，矩形波形信号发生器，乘法器 用于将幅度控制器的输出乘以加法器的输出和脉冲宽度调制器。 矩形波形信号发生器适于产生频率与加法器的输出电压值成比例的三相矩形信号。 基于速度偏差，每相的矩形信号以脉冲宽度调制，逆变器由所得到的脉冲宽度调制矩形信号控制，从而改变三相交流电压的有效值，并使速度 的感应电动机常数。
-
公开(公告)号：US4319177A
公开(公告)日：1982-03-09
申请号：US176337
申请日：1980-08-08
申请人： Shigeki Kawada , Hiroshi Ishida
发明人： Shigeki Kawada , Hiroshi Ishida
摘要： An apparatus for controlling the operation of an AC motor wherein braking energy at the time of a reduction in motor speed is disposed of by regenerative braking. The apparatus includes a rectifier which is connected to the AC power source, a DC link which includes smoothing capacitors and a regenerative transistor bridge circuit, a variable voltage-variable frequency inverter. Further provided are a diode which is connected between the rectifier and the transistor bridge circuit and which is biased in the reverse direction at the time of regenerative braking, and a firing control circuit for detecting the reverse bias voltage of the diode to control the firing of each transistor in the transistor bridge circuit, the braking energy being fed back to the AC power source when the AC motor undergoes a reduction in speed. The apparatus, which provides stable regenerative operation, can be constructed simply and inexpensively, and reduced in size.
摘要翻译： 一种用于控制AC电动机的操作的装置，其中通过再生制动来排除电动机速度降低时的制动能量。 该装置包括连接到AC电源的整流器，包括平滑电容器的DC链路和再生晶体管桥接电路，可变电压变频逆变器。 还提供了二极管，其连接在整流器和晶体管桥接电路之间，并且在再生制动时被反向偏置，并且用于检测二极管的反向偏置电压以控制烧制的触发控制电路 晶体管桥接电路中的每个晶体管，当AC电动机经历速度降低时，制动能量被反馈到AC电源。 提供稳定的再生操作的装置可以简单且廉价地构造并减小尺寸。
-
公开(公告)号：US4088933A
公开(公告)日：1978-05-09
申请号：US711156
申请日：1976-08-03
摘要： A DC motor phase control system is provided in a system having a first controlled rectifier connected to an AC power supply and providing a positive rectified output and a second controlled rectifier providing a negative rectified output. A DC motor is controlled for forward and reverse rotation and is controlled in speed by the firing control of the rectifiers. The pulse indicating the zero point of the AC power supply voltage is delayed according to the actual speed of the motor and the delayed pulse is used as a reference pulse of the controlled firing pulses applied to the controlled rectifiers.
摘要翻译： 在具有连接到AC电源并提供正整流输出的第一受控整流器和提供负整流输出的第二可控整流器的系统中提供DC电动机相位控制系统。 控制直流电机正向和反向旋转，并通过整流器的点火控制控制速度。 指示交流电源电压的零点的脉冲根据电动机的实际速度而延迟，并且延迟的脉冲用作施加到受控整流器的受控点火脉冲的参考脉冲。
-
公开(公告)号：US5334924A
公开(公告)日：1994-08-02
申请号：US316763
申请日：1981-10-30
申请人： Shigeki Kawada , Hiroshi Ishida
发明人： Shigeki Kawada , Hiroshi Ishida
CPC分类号： H02P23/0077
摘要： Speed control of an induction motor is effected in digital fashion through use of a computer but without complex processing, and with a computer that need not be large in scale. This is accomplished by processing at least a speed command signal, actual speed signal and torque signal in analog fashion, enabling simplification of an induction motor speed control digital processing section which performs all other control operations in a digital manner. In a speed control network having a closed loop, a frequency-to-voltage converter, adder-subtractor, proportional integrator, polarity determining circuit absolute value circuit and voltage-to-frequency converter are constructed of circuitry operable on the basis of analog values, with all other circuits being constructed of circuitry operable on the basis of digital values.
摘要翻译： 感应电动机的速度控制通过使用计算机以数字方式实现，但不需要复杂的处理，并且与不需要大规模的计算机进行。 这通过以模拟方式处理至少一个速度指令信号，实际速度信号和扭矩信号来实现，从而能够简化以数字方式执行所有其它控制操作的感应电动机速度控制数字处理部分。 在具有闭环的速度控制网络中，基于模拟值可操作的电路构成了电压 - 电压转换器，加法器 - 减法器，比例积分器，极性确定电路绝对值电路和电压 - 频率转换器， 所有其他电路由基于数字值操作的电路构成。
-
-
-
-
-
-
-
-
-
搜索结果
39 条记录 (耗时 0.022 秒)
