公开(公告)号：US5023531A

公开(公告)日：1991-06-11

申请号：US195914

申请日：1988-05-19

申请人： George A. Altemose ,  Michael Consi ,  Edwin R. Joscelyn ,  William Wiemann ,  David B. Giguere ,  Wilfred J. Gully ,  Stanley E. Spencer

发明人： George A. Altemose ,  Michael Consi ,  Edwin R. Joscelyn ,  William Wiemann ,  David B. Giguere ,  Wilfred J. Gully ,  Stanley E. Spencer

IPC分类号： F25B49/02 ,  G05D23/20 ,  H02P6/12

CPC分类号： H02P6/12 ,  F25B49/025 ,  G05D23/1913 ,  G05D23/20

摘要： A refrigeration control apparatus especially adapted for use in conjunction with cryogenic coolers includes a brushless variable speed drive motor for powering a mechanical cooler-compressor and electronic control circuitry coupled to the motor allowing motor speed and hence cooling rate to be responsive to changes in the temperature of the volume sought to be cooled. A signal corresponding to sensed temperature is compared to a reference signal derived from motor speed. The difference therebetween used to vary the duty cycle of a high frequency pulse train. The pulse train is used to modulate the drive current applied to the motor through pulse position switching circuitry to vary the speed of the drive motor. High and low motor speed limits are provided along with sensor failure protection circuitry to insure continuous motor operation between chosen limits.

摘要翻译： 特别适合与低温冷却器一起使用的制冷控制装置包括用于给机械冷却器和压缩机供电的无刷变速驱动电机和耦合到电动机的电子控制电路，允许电动机转速并因此响应于温度变化的冷却速度 的体积试图冷却。 将对应于感测温度的信号与从电机速度导出的参考信号进行比较。 它们之间的差异用于改变高频脉冲串的占空比。 脉冲串用于通过脉冲位置切换电路调制施加到电机的驱动电流，以改变驱动电机的速度。 提供高电机和低电机速度限制以及传感器故障保护电路，以确保连续电机在选定极限之间运行。