公开(公告)号：US4562393A

公开(公告)日：1985-12-31

申请号：US537028

申请日：1983-09-29

申请人： Robert J. Loyzim ,  Michael P. Blythe

发明人： Robert J. Loyzim ,  Michael P. Blythe

IPC分类号： H02P7/00 ,  G05B11/28

CPC分类号： H02P7/04 ,  Y10S388/902 ,  Y10S388/915

摘要： In a motor control system for a DC motor, a modulation circuit provides a plurality of pulse width modulated signals to control the current applied to the motor. The motor is coupled to a current sensing resistor and a plurality of switches responsive to the pulse width modulated control signals. The output of the current sensing resistor is summed with an input current command to provide an error signal. A modulation circuit which includes a waveform generator generates a plurality of interposed triangular waves adjustably offset by a predetermined amount. The triangular waves are compared to the error signal to provide pulse width modulated control signals which cause a "dither" current to be applied to the motor when there is substantially no input command and currents having substantially decreasing form factors to be applied as the input command increases.

摘要翻译： 在用于DC电动机的电动机控制系统中，调制电路提供多个脉冲宽度调制信号以控制施加到电动机的电流。 电动机耦合到电流感测电阻器和响应于脉宽调制控制信号的多个开关。 电流检测电阻的输出与输入电流指令相加以提供误差信号。 包括波形发生器的调制电路产生可调整偏移预定量的多个插入三角波。 将三角波与误差信号进行比较，以提供脉冲宽度调制控制信号，当基本上没有输入命令和电流具有基本上减小的形状因子作为输入指令时，会产生“抖动”电流施加到电动机 增加

公开(公告)号：US4336858A

公开(公告)日：1982-06-29

申请号：US957533

申请日：1978-11-03

申请人： Robert J. Loyzim

发明人： Robert J. Loyzim

IPC分类号： A61B6/00 ,  A61B6/10 ,  A61B19/02 ,  B60K31/00 ,  B60T7/12 ,  B60T13/74

CPC分类号： B60W30/1819 ,  A61B50/10 ,  A61B6/00 ,  A61B6/105 ,  B60K31/0075 ,  B60T13/74 ,  B60T7/12 ,  B60W10/10 ,  B60W10/18

摘要： A braking system for a mobile medical diagnostic device having forward support wheels operatively associated with proportional electromechanical brakes and a single central steerable wheel assembly at the rear of the device. Means are provided for generating throttle command signals and actual velocity signals and for comparing the two and for applying current to the proportional brakes to a degree which is proportional to the difference in those two signals. When this difference exceeds a predetermined level, a motor brake is further actuated to augment the proportional braking system. Also included is a means for automatically reducing the throttle command signal in proportion to the degree that the steerable wheel assembly is turned from the straight-ahead position.

摘要翻译： 一种用于移动医疗诊断装置的制动系统，其具有与比例机电制动器可操作地相关联的前支撑轮和在装置后部的单个中央可转向轮组件。 提供了用于产生节气门指令信号和实际速度信号的装置，并用于比较两者并将电流与比例制动器相加到与两个信号的差成比例的程度。 当该差异超过预定水平时，进一步致动电动机制动器以增大比例制动系统。 还包括与可转向轮组件从直线前进位置转动的程度成比例地自动降低节气门指令信号的装置。

公开(公告)号：US4392096A

公开(公告)日：1983-07-05

申请号：US311687

申请日：1981-10-15

申请人： John P. Grajewski ,  Robert J. Loyzim

发明人： John P. Grajewski ,  Robert J. Loyzim

IPC分类号： A61B6/03 ,  A61B6/04 ,  G05B19/23 ,  G05B11/32

CPC分类号： A61B6/0457 ,  A61B6/0442 ,  G05B19/232 ,  G05B2219/34215 ,  G05B2219/43144 ,  G05B2219/45221

摘要： An X-ray table base, an intermediate support mounted on the base for moving bidirectionally, and a carriage with a patient cradle on it mounted for moving bidirectionally on the support. There are individual servomotors for driving the support and cradle, respectively. Each servomotor drives an analog tachometer. The tachometer signals are compared with ramp signals. When, for example, the intermediate support nears the limit of its forward travel, its servo amplifier receives a decreasing ramp signal and the servo amplifier for the cradle motor receives a concurrent increasing ramp signal such that the support decelerates to zero velocity at a predetermined rate and the cradle accelerates to the previous constant velocity of the support at a rate that results in the cradle moving at a constant rate relative to the base.

摘要翻译： X射线台底座，安装在基座上的双向移动的中间支架，以及安装有用于在支撑件上双向移动的患者托架的滑架。 有各自的伺服电机分别用于驱动支架和支架。 每个伺服电机驱动一个模拟转速表。 将转速计信号与斜坡信号进行比较。 当例如中间支架接近其向前行程的极限时，其伺服放大器接收减小的斜坡信号，并且用于托架电动机的伺服放大器接收同时增加的斜坡信号，使得支架以预定速率减速到零速度 并且托架以使得支架相对于基座以恒定速率移动的速率加速到支撑件的先前恒定速度。

公开(公告)号：US3967179A

公开(公告)日：1976-06-29

申请号：US474671

申请日：1974-05-30

申请人： Robert J. Loyzim

发明人： Robert J. Loyzim

IPC分类号： H02P8/00 ,  H02K37/00

CPC分类号： H02P8/00

摘要： A stepping motor is energized by a power supply that supplies charges of power with the number and duration of the charges being controlled according to the current operating conditions of the motor. The charges are supplied to a capacitor across which the motor is connected for energization with the voltage developed across the capacitor being the voltage supplied the motor.

摘要翻译： 步进电机由电源供电，该电源根据电动机的当前工作条件向控制电荷的数量和持续时间提供电力。 电荷被提供给电容器，电动机连接到电容器上以供电，电容器两端产生的电压是电机的电压。