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1. 发明授权

US4499531A Power converter 失效
标题翻译：电源转换器
公开(公告)号：US4499531A
公开(公告)日：1985-02-12
申请号：US438794
申请日：1982-11-03
申请人： William E. Bray
发明人： William E. Bray
IPC分类号： H02M3/338 , H02M3/335
CPC分类号： H02M3/3385
摘要： A self-referencing self-oscillating power converter is disclosed. The power converter operates in the flyback switch mode to convert a high voltage DC power source to low voltage regulated power supply voltages applied to a load. Energy is stored in a primary winding of a power transformer during energy store cycles by causing a current to flow in the primary winding. This current is interrupted and the stored energy is delivered across the transformer to the load during an energy transfer cycle. The converter includes means for sensing the current in the primary winding at low voltage potentials, and for controlling the duration of each energy store cycle in response to the level of current in the primary winding to deliver the power required to drive the load at the regulated voltages.
摘要翻译：公开了一种自参考自振动功率转换器。电源转换器以反激开关模式工作，将高压直流电源转换为施加到负载的低压稳压电源电压。通过使电流在初级绕组中流动，在能量存储循环期间，能量被存储在电力变压器的初级绕组中。该电流被中断，并且在能量转移循环期间，存储的能量在变压器上传送到负载。转换器包括用于以低电压电位感测初级绕组中的电流的装置，并且用于响应于初级绕组中的电流水平来控制每个能量存储周期的持续时间，以传递在调节的驱动负载下所需的功率电压。

2. 发明授权

US4227230A Switch mode driver 失效
标题翻译：开关模式驱动
公开(公告)号：US4227230A
公开(公告)日：1980-10-07
申请号：US943822
申请日：1978-09-19
申请人： William E. Bray
发明人： William E. Bray
IPC分类号： H01H47/32 , H03K17/62
CPC分类号： H03K17/6285 , H01H47/325
摘要： A switch mode driver for a wire matrix printer employs a single power switch circuit to connect one or more solenoids across a DC source or power and to disconnect those solenoids from that source. Enable signals are provided to select any one or all of the solenoids, such enable signals remaining for a predetermined time during which a slewing period, followed by a chopping period, occur and after which energy remaining in the selected solenoids is returned to the DC power source. The initial ramping of current through the selected solenoids occurs when the power switch circuit is closed for a time period determined by an RC circuit, such time period defining the slewing period. Then the power switch opens and the chopping period begins. The charge on the capacitor of the RC circuit is discharged and at a certain voltage point, the power switch is again closed until the charge on the capacitor of the RC circuit again reaches a predetermined voltage at which time the power switch opens. This chopping action continues until the enabling signals are disabled. In this preferred embodiment, the time when the power switch is turned on is approximately 1/10 of the chopping period.
摘要翻译：用于有线矩阵打印机的开关模式驱动器采用单个功率开关电路来连接跨越DC源或功率的一个或多个螺线管，并且从该源断开那些螺线管。提供启用信号以选择任何一个或所有螺线管，这样的使能信号在其中发生回转周期（接着是斩波周期）的预定时间内保持，并且在所选螺线管中剩余的能量返回到DC功率资源。当电源开关电路在由RC电路确定的时间段内关闭时，限制回转周期的时间段，电流的初始斜坡发生。然后电源开关打开，斩波期开始。 RC电路的电容器上的电荷被放电，在某一电压点，电源开关再次闭合，直到RC电路的电容器上的电荷再次达到预定的电压，此时电源开关打开。这种斩波动作持续到使能信号被禁止。在本实施方式中，电源开关接通的时间约为斩波期间的1/10。

3. 发明授权

US4225913A Self-referencing power converter 失效
标题翻译：自参考功率转换器
公开(公告)号：US4225913A
公开(公告)日：1980-09-30
申请号：US944036
申请日：1978-09-19
申请人： William E. Bray
发明人： William E. Bray
IPC分类号： H02M1/10 , H02M3/338 , H02P13/20
CPC分类号： H02M3/3385 , H02M1/10
摘要： A self-referencing power converter operates at a high frequency with a low loss, light weight ferrite core transformer. The transformer primary is selectively connected across a DC source of rectified AC power to provide energy storage followed by a predetermined time period of disconnect to provide energy transfer by way of transformer flyback. The energy storage cycle begins when the voltage across the primary winding of the transformer does not exceed a predetermined value and the predetermined time period of disconnect has ended. A current sensing circuit senses the current flowing through the primary winding, permitting such current to flow until a power reference is reached. A comparison circuit in the transformer secondary compares a reference voltage with an operating voltage and returns any error voltage to the primary circuit, the error voltage then being used to set the power reference.
摘要翻译：自参考功率转换器以低损耗，重量轻的铁氧体磁芯变压器在高频下工作。变压器初级选择性地连接在整流AC电源的直流电源上，以提供能量存储，随后是预定的断开时间段，以通过变压器反激提供能量传递。当变压器的初级绕组两端的电压不超过预定值并且断开的预定时间段已经结束时，能量存储循环开始。电流感测电路感测流过初级绕组的电流，允许这种电流流动直到达到功率基准。变压器二次比较电路将参考电压与工作电压进行比较，并向主电路返回任何误差电压，然后将误差电压用于设置功率基准。

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