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    • 61. 发明公开
    • Rectifier circuit
    • 整流器电路
    • EP1643627A2
    • 2006-04-05
    • EP05250772.0
    • 2005-02-10
    • FUJITSU LIMITED
    • Gotoh, Kunihiko, c/o Fujitsu LimitedYamazaki, Daisuke c/o Fujitsu Limited
    • H02M7/217
    • H02M7/1555
    • A rectifier circuit is provided which is capable of improving linearity of a current flowing between its drain and source and of increasing reliability of a transistor. In a diode-connected NMOS (N-type Metal Oxide Semiconductor) transistor (M1), a voltage (Va) fed from a power source is rectified and output as a voltage (Vb). A capacitor (C1) applies a voltage (Vbg) to make a current flow less easily through a parasitic diode (D2) occurring in the transistor (M1). By supplying the voltage (Va) made to be small by a capacitor (C1) to a backgate, an operating point of the parasitic diode (D2) is deviated to cause the current to flow less easily. This causes a current to flow mainly through the transistor (M1), which improves linearity of a voltage to be rectified. Decreased current in the backgate increases reliability of the transistor (M1).
    • 提供了一种整流器电路,其能够改善在其漏极和源极之间流动的电流的线性并且提高晶体管的可靠性。 在二极管连接的NMOS(N型金属氧化物半导体)晶体管(M1)中,从电源馈送的电压(Va)被整流并作为电压(Vb)输出。 电容器(C1)施加电压(Vbg)以使电流不易通过晶体管(M1)中出现的寄生二极管(D2)流动。 通过将由电容器(C1)做得很小的电压(Va)提供给背栅,寄生二极管(D2)的工作点发生偏移而使得电流不易流动。 这导致电流主要流过晶体管(M1),这改善了要整流的电压的线性度。 背栅中的电流减小增加了晶体管(M1)的可靠性。
    • 65. 发明申请
    • METHOD, SYSTEM, AND APPARATUS FOR CONTROLLING AN ELECTRIC MOTOR
    • 用于控制电动机的方法,系统和装置
    • US20070290645A1
    • 2007-12-20
    • US11755627
    • 2007-05-30
    • George BoyadjieffJohn Hurst
    • George BoyadjieffJohn Hurst
    • H02K23/00
    • H02M7/1555H02J3/1892H02M1/082H02M1/4208H02P23/26H02P31/00Y02B70/126
    • The present invention provides systems and methods for power factor control of a motor. A phase detector uses a line voltage of a power supply and a motor terminal voltage of a motor. The output of the phase detector is synchronized to a zero crossing of the motor current of the motor and a zero crossing of the line voltage. A digital microprocessor connected between the output of the phase detector and a rectifier driver senses a first time at which a phase of the motor voltage is crossing zero volts and a second time at which a phase of the motor current is crossing zero current. The digital microprocessor calculates the difference in time between the first and second times and uses the difference in time to calculate a phase lag of the motor. The digital microprocessor uses the phase lag to calculate a firing time of a rectifier to command power efficiently to the motor.
    • 本发明提供了一种用于电机的功率因数控制的系统和方法。 相位检测器使用电源的线路电压和电动机的电动机端子电压。 相位检测器的输出与电动机的电动机电流的过零点和线路电压的过零点同步。 连接在相位检测器的输出端和整流器驱动器之间的数字微处理器检测电动机电压的相位与零电压相交的第一次,以及电动机电流的相位与零电流相交的第二时间。 数字微处理器计算第一次和第二次之间的时间差,并使用时间差来计算电动机的相位滞后。 数字微处理器使用相位滞后来计算整流器的点火时间以有效地向电动机指示功率。
    • 67. 发明授权
    • Electric power supply device for a monitor
    • 监视器用电源装置
    • US5650924A
    • 1997-07-22
    • US624220
    • 1996-03-29
    • Dong-Young Huh
    • Dong-Young Huh
    • H04N3/18G09G1/00H02M3/28H02M7/155H02M7/217
    • H02M7/1555G09G2330/021H02M1/36
    • Disclosed is an electric power supply device having mininized power consumption during an off-mode of a monitor. The present invention has an electric power input unit including a bridge diode for outputting an output signal by rectifying an alternate electric signal supplied from the external, a switch for switching to pass the first signal, and a capacitor for rectifying the first signal of the bridge diode and supplying the rectified first signal to a primary winding of a transformer; an electric power economizer for generating a switching signal in order to control the switch according to presence or non-presence of a synchronizing signal inputted from the external, and for preventing the transformer from being operated by switching the switch to a turn-off state during an off-mode of the monitor; and an electric power supplier for rectifying induced signals of one or more secondary windings of the transformer, and for stabilizing the rectified induced signals to supply the stabilized and rectified induced signals to one or more loads. With the present invention, consumption of electric power can be minimized since during an off-mode of a monitor a transformer is disabled.
    • 公开了一种在监视器的关闭模式期间具有最小功耗的电力供应装置。 本发明具有电力输入单元,该电力输入单元包括:桥式二极管,用于通过对从外部提供的交替电信号进行整流来输出输出信号;开关,用于切换以通过第一信号;以及电容器,用于整流桥的第一信号 并将整流的第一信号提供给变压器的初级绕组; 电力节能器,用于产生开关信号,以便根据从外部输入的同步信号的存在或不存在来控制开关,并且用于通过将开关切换到关断状态来防止变压器的操作 监视器的关闭模式; 以及用于整流变压器的一个或多个次级绕组的感应信号的电力供应器,并且用于稳定整流的感应信号,以将稳定和整流的感应信号提供给一个或多个负载。 利用本发明,由于在监视器的关闭模式期间,变压器被禁用,所以可以使电力消耗最小化。
    • 68. 发明授权
    • AC to DC conversion system with current spreading circuit
    • 具有电流扩展电路的交直流转换系统
    • US4523266A
    • 1985-06-11
    • US466331
    • 1983-02-14
    • Dale H. Nelson
    • Dale H. Nelson
    • H02M3/28H02M3/337H02M7/155H02P13/24
    • H02M3/337H02M3/28H02M7/1555
    • A power supply circuit having a higher power factor and decreased current crest factor. The circuit preferably comprises an input circuit for receiving an input AC voltage and rectifying this voltage and an output circuit for providing a DC output voltage. A pulse-width-modulation circuit intercouples between the input and output circuits and includes a controlled circuit adapted to pass input AC current in pulse-wide increments with the pulse-width varying in inverse proportion to the AC voltage. In this manner, when the instantaneous AC voltage is low, the pulse widths are wider and conversely when the voltage is high, the pulse widths are narrower. In one version of the invention, the pulse width modulation is carried out by a programmed variable ratio transformer. In one preferred embodiment of the present invention, the current spreading circuit is of a quasi cosecant type while in another preferred embodiment of the invention, there is a combination of pulse-width-modulation with a typical input filter circuit including an OR circuit at the output to provide the necessary combining.
    • 具有较高功率因数和降低的电流波峰因数的电源电路。 该电路优选地包括用于接收输入AC电压并整流该电压的输入电路和用于提供DC输出电压的输出电路。 脉冲宽度调制电路在输入和输出电路之间相互耦合,并且包括受控电路,其适于以脉冲宽度增量传递输入AC电流,脉冲宽度与AC电压成反比变化。 以这种方式,当瞬时AC电压低时,脉冲宽度较宽,相反,当电压高时,脉冲宽度变窄。 在本发明的一个版本中,脉冲宽度调制由编程的可变比变压器来执行。 在本发明的一个优选实施例中,电流扩展电路是准辅助型,而在本发明的另一个优选实施例中,存在脉冲宽度调制与典型的输入滤波电路的组合,该电路包括在 输出提供必要的组合。
    • 69. 发明授权
    • Power supply for electronic control system
    • 电子控制系统电源
    • US4456871A
    • 1984-06-26
    • US365861
    • 1982-04-05
    • Frederick A. Stich
    • Frederick A. Stich
    • H02H1/06H02M7/155G05F5/00
    • H02H1/06H02M7/1555
    • An inexpensive power supply for an electconic control system or the like which is capable of converting a wide range of applied AC voltages into a regulated output voltage. A thyristor is coupled in series with an input terminal and a threshold device, such as a Zener diode, placed across the input terminals and paralleled by an RC circuit coupled to the thyrisor gate. Another capacitor is coupled to the thyristor cathode. A ramp-like voltage impressed on the thyristor gate effects triggering at a phase angle which varies in accordance with output voltage. The electronic control system outputs a uniform train of pulses which serve to disable a circuit interrupter. Termination or disruption of the pulse train causes the interrupter to open the protected circuit.
    • 用于电子控制系统等的便宜的电源,其能够将宽范围的施加的AC电压转换成稳定的输出电压。 晶闸管与输入端子和诸如齐纳二极管的阈值器件串联耦合,该器件放置在输入端子两端并且由耦合到甲苯门的RC电路并联。 另一个电容器耦合到晶闸管阴极。 施加在晶闸管栅极上的斜坡电压以相位角发生触发,该相角根据输出电压而变化。 电子控制系统输出统一的脉冲串,用于禁用电路断路器。 脉冲串的终止或中断使断路器打开受保护的电路。