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1. 发明授权

US5457364A Bridge motor driver with short-circuit protection and motor-current limiting feature 失效
标题翻译：桥式电机驱动器具有短路保护和电机限流功能
公开(公告)号：US5457364A
公开(公告)日：1995-10-10
申请号：US182327
申请日：1994-01-18
申请人： Alberto Bilotti , Jose L. Tallarico
发明人： Alberto Bilotti , Jose L. Tallarico
IPC分类号： H02H7/085 , H02P7/00 , H02K17/32
CPC分类号： H02H7/0855 , H02P29/027 , H02P7/04
摘要： A full-wave bridge driver has four driver transistors. A motor is connected to the output terminals of the bridge. A fault detector latches off the four driver transistors when the bridge current jumps essentially instantaneously to exceed a predetermined safe-peak value due to a fault occurring in the bridge. A comparator has a predetermined current threshold, that is less than the predetermined safe-peak value of the fault detector, and is connected to a bridge-current sensing resistor for, when the bridge current exceeds the current threshold, producing a signal proportional to the difference between the bridge current and the current threshold. A pulse-width-modulator is connected to the comparator means output, and during periods such as at motor starting when the bridge current gradually exceeds the comparator threshold value, chops the signal at the bases of the four driver transistors, varying the chopped pulse widths to hold the motor current at essentially the threshold current value. For faults that occur across the motor or between the motor and either of the DC-supply terminals, the fault current paths in the bridge do not flow through the inductance of the motor and produce a sharp rising bridge fault current that is essentially transparent to the pulse width modulator which clamps high motor start currents at a level below that at which the fault detector trips the latch and shuts off the driver transistors.
摘要翻译：全波桥驱动器有四个驱动晶体管。电机连接到桥的输出端。当桥电流基本瞬时跳跃时，故障检测器锁存四个驱动晶体管，由于在桥中发生故障而超过预定的安全峰值。比较器具有小于故障检测器的预定安全峰值的预定电流阈值，并且连接到电桥电流检测电阻器，当桥电流超过电流阈值时，产生与桥电流和电流阈值之间的差值。脉冲宽度调制器连接到比较器装置输出端，并且在桥电流逐渐超过比较器阈值的电机启动期间，在四个驱动晶体管的基极处切断信号，改变斩波脉冲宽度以将电动机电流保持在基本上的阈值电流值。对于在电动机或电动机与任何一个直流电源端子之间发生的故障，桥中的故障电流路径不会流过电动机的电感，并产生尖锐的上升桥故障电流，其基本上对于脉冲宽度调制器，其将电动机启动电流高于低于故障检测器跳闸并关闭驱动晶体管的电平。

2. 发明授权

US5075568A Switching bipolar driver circuit for inductive load 失效
标题翻译：开关双极驱动电路用于感性负载
公开(公告)号：US5075568A
公开(公告)日：1991-12-24
申请号：US643311
申请日：1991-01-22
申请人： Alberto Bilotti , Jose L. Tallarico
发明人： Alberto Bilotti , Jose L. Tallarico
IPC分类号： H03K17/0412 , H03K17/66
CPC分类号： H03K17/66 , H03K17/04126
摘要： A bipolar chopping driver circuit has a pair of NPN totem-pole connected driver transistors with a fly-back diode connected across the NPN source transistor and a biasing resistor connected between base and emitter of the source transistor. A fullwave bridge driver may be comprised of two such totem pole circuits with the inductive load connected between them at the junctions between NPN source and sink transistors. A clamp circuit is provided in both cases, for preventing the voltage swings at the bases of the source transistors from exceeding the DC supply voltage that is connected to the collectors of the source transistors, thereby permitting operation at high chopping frequencies without excessive delay in switching load current and excessive power losses.
摘要翻译：双极斩波驱动器电路具有一对NPN图腾柱连接的驱动器晶体管，其具有连接在NPN源晶体管两端的反向二极管和连接在源晶体管的基极和发射极之间的偏置电阻器。全波桥驱动器可以由两个这样的图腾柱电路组成，其中感应负载在它们之间连接在NPN源极和漏极晶体管之间的结处。在两种情况下都提供钳位电路，用于防止源极晶体管基极处的电压摆幅超过连接到源极晶体管的集电极的直流电源电压，从而允许在高斩波频率下工作，而不会导致开关过度延迟负载电流和功率损耗过大。

3. 发明授权

US5471122A DC-motor bridge driver with end-of-braking detector 失效
标题翻译：具有制动结束检测器的直流电机桥式驱动器
公开(公告)号：US5471122A
公开(公告)日：1995-11-28
申请号：US210498
申请日：1993-09-14
申请人： Alberto Bilotti , Jose L. Tallarico
发明人： Alberto Bilotti , Jose L. Tallarico
IPC分类号： H02P7/00 , H02P3/00
CPC分类号： H02P7/04 , Y10S388/921
摘要： A full-bridge driver, and especially an entirely integrated bridge driver, for driving DC motors in either direction is capable of automatically braking the motor when the motor direction is to be reversed. The bridge circuit is of "H" configuration and has four transistor switches connected in bridge configuration and has two bridge output terminals to which a motor may be connected. A differential window comparator has the input connected to the two bridge output terminals, producing a high level binary signal only when the voltage across the two output terminals is within a small voltage range centered at about zero volts. A pulse-width filter circuit having an input connected to the window comparator produces a high binary output signal only when the comparator-produced binary signal remains high for greater than a predetermined time. The effect of the pulse-width filter in combination with the window comparator is to ignore the first occurrence during braking of zero motor voltage, and to recognize the second occurrence of zero motor voltage which indicates the end of the braking period at which time the motor has stopped, after which the motor can be operated in the reverse direction without creating large transient transistor and motor currents during such a transition of motor running direction.
摘要翻译：一个全桥驱动器，特别是一个完全集成的桥式驱动器，用于在任一方向驱动直流电机，能够在电机方向颠倒时自动制动电机。桥式电路为“H”型配置，并具有以桥式结构连接的四个晶体管开关，并具有可连接电动机的两个桥式输出端子。差分窗口比较器具有连接到两个桥式输出端子的输入端，仅当两个输出端子两端的电压处于以零伏特为中心的小电压范围内时才产生高电平二进制信号。具有连接到窗口比较器的输入端的脉冲宽度滤波器电路仅在比较器产生的二进制信号保持高电平大于预定时间时产生高二进制输出信号。脉冲宽度滤波器与窗口比较器组合的效果是忽略零电机电压制动期间的第一次发生，并且识别出零电机电压的第二次出现，其表示制动周期的结束，此时电机已经停止，此后电动机可以在相反方向上操作，而不会在电动机运行方向的这种转变期间产生大的瞬态晶体管和电动机电流。

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