公开(公告)号：US5111373A

公开(公告)日：1992-05-05

申请号：US647026

申请日：1991-01-29

申请人： Shigetoshi Higaki

发明人： Shigetoshi Higaki

IPC分类号： H02M1/12 ,  H02M5/458 ,  H02M7/48

CPC分类号： H02M5/458 ,  H02M1/12

摘要： In a PWM control type power supply apparatus, a modulation (high frequency) signal component is eliminated not only from AC input, but also AC output. The PWM control type power supply apparatus includes: an AC-to-DC converting unit capable of supplying a first AC voltage having a source frequency from a pair of output terminals, for converting the first AC voltage to obtain a positive DC (direct current) voltage from a positive half cycle and a negative DC voltage from a negative half cycle of the first AC voltage appearing at one output terminal with a common voltage appearing at another output terminal; a DC-to-AC inverter unit including a pair of first and second switching elements, and a PWM (pulse width modulation) controller for controlling switching operations of the first and second switching elements in a PWM control mode so as to invert the positive and negative DC voltage into a second AC voltage having a modulation frequency higher than the source frequency the second AC voltage being applied to a load; and a choke coil having a single core and first, second and third coil windings wound on the single core for magnetically coupling the coil windings with each other, the first and second coil windings being interposed between the AC power source and the AC-to-DC converting means, and also the third coil winding being interposed between the DC-to-AC inverter unit and the load.

公开(公告)号：US4934822A

公开(公告)日：1990-06-19

申请号：US349099

申请日：1989-05-09

申请人： Shigetoshi Higaki

发明人： Shigetoshi Higaki

IPC分类号： H02M5/458 ,  H02M7/48 ,  H02M7/5388

CPC分类号： H02M5/4585

摘要： In a PWM control type power supply apparatus, there are provided a single-phase full-wave rectifier coupled to a power source having a low frequency, for rectifying a first AC (alternating current) voltage to produce a DC (direct current) voltage; a DC-to-AC inverter including a first pair of switching elements connected to an input terminal thereof, and a second pair of switching elements connected to an output terminal thereof and to the first pair of switching elements to constitute a bridge inverter circuit, for inverting the DC voltage into a second AC voltage to be applied to a load; and a switching controller connected to the DC/AC inverter for alternately turning ON/OFF the second pair of switching elements in response to a sync signal (SYC) in synchronism with the first AC voltage at the low frequency of the power source, and for alternately turning ON/OFF the first pair of switching elements in response to a PWM (pulse-width modulation) control signal obtained from the first AC voltage and the second AC voltage, in a PWM control mode at a high-frequency higher than the low frequency of the power source, whereby a phase of the second AC voltage is opposite to that of the first AC voltage.

摘要翻译： 在PWM控制型电源装置中，提供了耦合到具有低频率的电源的单相全波整流器，用于整流第一AC（交流）电压以产生DC（直流）电压; DC-AC逆变器，包括连接到其输入端的第一对开关元件和连接到其输出端的第二对开关元件和第一对开关元件，以构成桥式逆变器电路，用于 将所述直流电压转换为施加到负载的第二交流电压; 以及连接到DC / AC逆变器的开关控制器，用于响应于与电源的低频下的第一AC电压同步的同步信号（SYC）交替地接通/断开第二对开关元件，并且为了 在PWM控制模式下，以高于低频的高频，响应于从第一AC电压和第二AC电压获得的PWM（脉冲宽度调制）控制信号交替地接通/断开第一对开关元件 电源的频率，由此第二AC电压的相位与第一AC电压的相位相反。

公开(公告)号：US4819121A

公开(公告)日：1989-04-04

申请号：US124387

申请日：1987-11-19

申请人： Suzuo Saito ,  Shigetoshi Higaki

发明人： Suzuo Saito ,  Shigetoshi Higaki

IPC分类号： G05F1/10 ,  H02H7/122 ,  H02J3/06 ,  H02J3/38 ,  H02H3/26

CPC分类号： H02H7/1227 ,  H02M7/48 ,  Y10T307/735

摘要： A security apparatus adapted to a power converter, including a power converting circuit connected between a DC power source and an AC system; a phase detector circuit for detecting the voltage phase of the AC system to provide a phase detection signal; a reference signal generator circuit for generating a voltage reference in accordance with the phase detection signal; a control circuit for controlling an output voltage of the power converting circuit in accordance with the voltage reference. The security apparatus is characterized by a disturbance generator circuit for applying a disturbance to the phase detector circuit; and a detector circuit for detecting an abnormal state in which the phase or frequency of the output voltage of the power converting circuit deviates from a normal one.

摘要翻译： 一种适用于功率转换器的安全装置，包括连接在DC电源和AC系统之间的电力转换电路; 相位检测器电路，用于检测AC系统的电压相位以提供相位检测信号; 参考信号发生器电路，用于根据相位检测信号产生电压基准; 控制电路，用于根据电压基准控制功率转换电路的输出电压。 该安全装置的特征在于用于对相位检测器电路施加干扰的扰动发生器电路; 以及检测电路，用于检测电力转换电路的输出电压的相位或频率偏离正常状态的异常状态。

公开(公告)号：US5045989A

公开(公告)日：1991-09-03

申请号：US403467

申请日：1989-09-06

申请人： Shigetoshi Higaki ,  Yoshitaka Hata

发明人： Shigetoshi Higaki ,  Yoshitaka Hata

IPC分类号： H02J9/06 ,  H02M1/00 ,  H02M1/42 ,  H02M5/458 ,  H02M7/538 ,  H02M7/5387

CPC分类号： H02M1/4208 ,  H02J9/062 ,  H02M5/458 ,  H02M7/538 ,  H02M7/53871 ,  H02M1/44 ,  Y02B70/126

摘要： In a PWM control type power supply apparatus, a modulation (high frequency) signal component is eliminated from an AC output. The PWM control type power supply apparatus includes: AC-to-DC converting means coupled to an AC (alternating current) power source capable of supplying a first AC voltage having a low frequency from a pair of output terminals, for converting the first AC voltage to obtain a positive DC (direct current) voltage from a positive half cycle of the first AC voltage appearing at one output terminal and a negative DC voltage from a negative half cycle of the first AC voltage appearing at one output terminal with a common voltage appearing at the other output terminal; and, DC-to-AC inverter means including a pair of first and second switching elements, and a PWM (pulse width modulation) controller for controlling switching operations of the first and second switching elements in a PWM control mode so as to invert the positive and negative DC voltage into a second AC voltage having a modulation frequency higher than the low frequency with respect to the common voltage output terminal, whereby the second AC voltage contains no modulation frequency component.