-
公开(公告)号：US20170093278A1
公开(公告)日：2017-03-30
申请号：US14870133
申请日：2015-09-30
Applicant: Dialog Semiconductor (UK) Limited
Inventor： Naoyuki Unno , Kemal Ozanoglu , Pier Cavallini , Louis de Marco
IPC: H02M3/156
CPC classification number: H02M3/156 , H02M1/32 , H02M3/137 , H02M3/142 , H02M3/155 , H02M3/158 , H02M3/1582
Abstract: An adaptive duty cycle limiting circuit is used with a switching DC-to-DC converter for preventing the duty cycle entering a region of operation having negative gain. The adaptive duty cycle limiting circuit includes a duty cycle ramp signal generator, a voltage source for providing a voltage having a fractional value of an input voltage source, and a comparator that compares the duty cycle ramp signal with the fractional value of the input voltage source. When the voltage level of the duty cycle ramp signal is less than the fractional value of the voltage source, a cycle limit signal is activated and communicated to a switching control circuit to adjust the duty cycle of the switching DC-to-DC converter to prevent the duty cycle entering the region of operation where the gain of the switching DC-to-DC converter becomes negative.
-
公开(公告)号：US4684859A
公开(公告)日：1987-08-04
申请号：US692114
申请日：1985-01-17
Applicant: Makoto Nohmi , Shoji Miyamoto , Tadashi Takaoka , Hiroyasu Oshima
Inventor： Makoto Nohmi , Shoji Miyamoto , Tadashi Takaoka , Hiroyasu Oshima
CPC classification number: H02M3/137 , Y10S388/90 , Y10S388/915 , Y10S388/92
Abstract: A novel control system for the motor or the like is disclosed which operates basically on principle that the power flowing in during the conduction of a chopper gate of a chopper device is integrated, and when the integrated value reaches a target, the gate is turned off, thereby realizing the control of an instantaneous value and high response and stability without the conventional feedback control. The target value is also reduced against the excess of the source voltage under variations in load for the regenerated power. Further, a constant-voltage control limiter is added to improve the ability to prevent a slip and race.
Abstract translation: 公开了一种用于电动机等的新型控制系统，其基本上基于在斩波装置的斩波栅极的导通期间流入的功率被积分的原理，并且当积分值达到目标时，门被关闭 从而实现瞬时值的控制和高响应和稳定性，而不需要传统的反馈控制。 在再生功率的负载变化下，目标值也相对于源极电压的过剩而减小。 此外，添加恒压控制限制器以提高防止滑动和竞赛的能力。
-
公开(公告)号：US4284938A
公开(公告)日：1981-08-18
申请号：US973973
申请日：1978-12-28
Applicant: Ronald B. Bailey
Inventor： Ronald B. Bailey
CPC classification number: H02M3/137 , H02P7/29 , Y10S388/919 , Y10S388/92
Abstract: Apparatus for controlling the voltage on a commutating capacitor in a thyristor time ratio control power circuit whereby the energy stored in the capacitor may be continuously adjusted to a magnitude required for commutation so that the size of the commutating circuit can be significantly reduced. An inductive circuit is provided in a charging current path for the capacitor so that the capacitor can be charged above available source voltage by capacitive/inductive action. A controllable switch connected in parallel with the inductive circuit provides a short-circuit path for terminating charging of the capacitor. A logic circuit monitors capacitor voltage, source voltage and load current and closes the controllable switch when the capacitor voltage reaches a magnitude established by the logic circuit as sufficient to commutate the measured magnitude of load current.
Abstract translation: 用于控制晶闸管时间比率控制电源电路中的换向电容器上的电压的装置，由此存储在电容器中的能量可以被连续地调节到换向所需的大小，从而可以显着地减少换向电路的尺寸。 在用于电容器的充电电流路径中提供感应电路，使得电容器可以通过电容/电感作用被充电到可用的源极电压以上。 与感应电路并联连接的可控开关提供用于终止电容器充电的短路路径。 逻辑电路监视电容器电压，源电压和负载电流，并且当电容器电压达到由逻辑电路建立的大小足以使测量的负载电流的大小变化时，闭合可控开关。
-
公开(公告)号：US4079270A
公开(公告)日：1978-03-14
申请号：US681248
申请日：1976-04-28
Applicant: Masahiko Ibamoto , Masato Suzuki , Sigeru Kuriyama
Inventor： Masahiko Ibamoto , Masato Suzuki , Sigeru Kuriyama
CPC classification number: H02M3/137
Abstract: In a semiconductor device which includes a main thyristor and an auxiliary thyristor for turning off the main thyristor and controls conduction period of the main thyristor according to a given duty factor, a gate control apparatus comprising a phase shifter for producing a square wave output corresponding to the duty factor, an integrator for integrating the output of the phase shifter, a relay circuit having two level settings and receiving the output from the integrator to produce an output which exhibits a hysterisis characteristic corresponding to the two level settings, and an amplifier for turning on the main thyristor in response to the output from the relay circuit and turning on the auxiliary thyristor upon the termination of the output from the relay circuit.
Abstract translation: 在包括用于关断主晶闸管的主晶闸管和辅助晶闸管的半导体器件中，根据给定的占空因数控制主晶闸管的导通周期，门控制装置包括用于产生对应于 占空因数，用于积分移相器的输出的积分器，具有两个电平设置的继电器电路并且接收来自积分器的输出以产生表现出与两个电平设置相对应的滞后特性的输出，以及用于转动的放大器 在主晶闸管上响应于继电器电路的输出并在继电器电路的输出终止时接通辅助晶闸管。
-
公开(公告)号：US4054817A
公开(公告)日：1977-10-18
申请号：US674129
申请日：1976-04-06
Applicant: David Gurwicz , Albert Everett Sloan
Inventor： David Gurwicz , Albert Everett Sloan
IPC: H02M3/137 , H03K17/735 , H03K3/00
CPC classification number: H03K17/735 , H02M3/137
Abstract: A thyristor pulse controller in which current supply to each of a plurality of d.c. loads is controlled by respective main thyristors and a single commutating capacitor common to all the main thyristors is provided, the capacitor being connected across the main thyristors to commutate them one at a time at intervals not less than the time required to forward charge the commutating capacitor from the d.c. source and to reverse the charge on the capacitor.
Abstract translation: 一种晶闸管脉冲控制器，其中电流供应到多个直流电 负载由相应的主晶闸管控制，并且提供了所有主晶闸管公共的单个换向电容器，电容器连接在主晶闸管两端，以不小于向整流电容器转发电荷所需的时间的间隔一次一个地交换 从直流 源并且反转电容器上的电荷。
-
Patent Agency Ranking
公开(公告)号：US3825817A
公开(公告)日：1974-07-23
申请号：US37615773
申请日：1973-07-03
Applicant: CAV LTD
Inventor： REVAL H
CPC classification number: H02M3/137
Abstract: A thyristor chopper circuit has a main thyristor for supplying current to a load and a commutating capacitor for turning the main thyristor off. The capacitor is charged by a saturating transformer when the main thyristor conducts, the primary winding of the saturating transformer being connected in series with the main thyristor, and current limiting means being provided for restricting the maximum mean current flow through the main thyristor, the current limiting means being responsive to the time taken for the transformer to saturate.
Abstract translation: 晶闸管斩波电路具有用于向负载提供电流的主晶闸管和用于使主晶闸管转向的换向电容器。 当主晶闸管导通时，电容器由饱和变压器充电，饱和变压器的初级绕组与主晶闸管串联连接，并且限流装置用于限制通过主晶闸管的最大平均电流，电流 限制装置响应于变压器饱和所花费的时间。
-
7.发明授权
公开(公告)号：US3761796A
公开(公告)日：1973-09-25
申请号：US25656472
申请日：1972-05-24
Applicant: DANFOSS AS
Inventor： JENSEN A
CPC classification number: H02M3/137
Abstract: An inverter arrangement including controlled rectifiers, the inverter being supplied by a regulatable direct voltage supply which includes an on-off switchable element and a filter. A control circuit connected to the output of the supply generates and directs first control pulses to the switchable element, and a pulse generator also connected to the output of the supply generates and directs second control pulses to control the rectifiers in the inverter. The control circuit includes a step regulator having an amplifier, a feedback path and apparatus for producing an oscillation, the step regulator having the effect of altering both the frequency and the width of the first control pulses when the voltage at the output of the supply changes.
Abstract translation: 一种包括受控整流器的逆变器装置，逆变器由可调节的直流电源提供，其包括开 - 关可切换元件和滤波器。 连接到电源的输出的控制电路产生并将第一控制脉冲引导到可切换元件，并且还连接到电源的输出的脉冲发生器产生并引导第二控制脉冲以控制逆变器中的整流器。 控制电路包括具有放大器，反馈路径和用于产生振荡的装置的阶跃调节器，该阶跃调节器具有当电源输出端的电压变化时改变第一控制脉冲的频率和宽度的效果 。
-
公开(公告)号：US3749976A
公开(公告)日：1973-07-31
申请号：US3749976D
申请日：1972-04-13
Applicant: CO GENERALE D ELECTRICITE
Inventor： COLYN R
Abstract: A first thyristor switch is turned on to supply charging current to the storage member until it is charged to a high predetermined or regulated voltage. When this voltage is reached, the first switch is turned off, and a second thyristor switch, connected across the storage member, is turned on to short-circuit the supply system. A voltage-limiting circuit keeps the voltage across the second switch to a value well below the high regulated voltage of the storage member.
Abstract translation: 第一晶闸管开关导通以向存储构件提供充电电流，直到它被充电到高的预定或调节电压。 当达到该电压时，第一开关断开，并且连接在存储构件上的第二晶闸管开关导通以使供电系统短路。 电压限制电路将第二开关两端的电压保持在远低于存储构件的高调节电压的值。
-
公开(公告)号：US3643149A
公开(公告)日：1972-02-15
申请号：US3643149D
申请日：1969-08-28
Applicant: MITSUBISHI ELECTRIC CORP
Inventor： SHIRASHOJI AKIRA
CPC classification number: H02M3/137 , B60L9/00 , H02P7/29 , Y10S388/903 , Y10S388/904 , Y10S388/92
Abstract: The disclosed DC power control system comprises n choppers connected in parallel to control vehicle motors and a comparison circuit for comparing a pattern current for the motors with the actual motor current to produce an error signal between them. The output from the circuit is clamped at such a predetermined magnitude that the choppers are each controlled to have a conduction time equal to any multiple of the chopping period divided by n at a given period at which the motor is operated in a predetermined control mode. The given period corresponds to the period during which a control handle is disposed at a given control notch of a conventional controller.
Abstract translation: 所公开的直流电力控制系统包括并联连接的n个斩波器以控制车辆电动机，以及用于将电动机的模式电流与实际电动机电流进行比较以在它们之间产生误差信号的比较电路。 来自电路的输出被钳位在预定的幅度，使得斩波器被控制为具有导通时间，该导通时间等于在预定控制模式下电动机操作的给定周期的斩波周期除以n的任何倍数。 给定期间对应于在常规控制器的给定控制槽口处设置控制手柄的期间。
-
公开(公告)号：US3585491A
公开(公告)日：1971-06-15
申请号：US3585491D
申请日：1969-01-21
Applicant: DANFOSS AS
Inventor： PETERSEN TOM KASTRUP
CPC classification number: H02M3/137
Abstract: A DC supply system which is suitable as a DC voltage source for a DC to AC inverter. Two stage regulator means are provided for intermittently actuating a semiconductor switch. The first stage is at constant frequency with the switch being made conductive at the beginning of periods and nonconductive at varying points in the periods to providing conducting intervals of varying length between minimum and maximum lengths. The second stage is at variable frequency with the switch being made conductive for time intervals of constant length. The system is operable to maintain a predetermined voltage subject to the prevention of the load current exceeding a maximum predetermined value.
-
-
-
-
-
-
-
-
-
Search Results
119
records
(took 0.015 seconds)
