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公开(公告)号：US06577037B2
公开(公告)日：2003-06-10
申请号：US09898912
申请日：2001-07-03
IPC分类号： H02K1600
CPC分类号： H02K49/046
摘要： In a magnetic coupler, a pair of magnet rotors is slidably mounted on rods. Ferrous material on the conductor rotors attracts the permanent magnets in the magnet rotors. Under static or relative static conditions, the attractive force urges the magnet rotors toward the conductor rotors to create a minimum, operational air gap therebetween. When there is a significant relative rotational velocity between the magnet rotors and the conductor rotors, a repulsion force urges the rotors apart. During start-up, latch arms retain the magnet rotors apart from the conductor rotors by a larger, soft-start air gap. During operation, centrifugal force moves the latch arms out of their active position. If the rotational speed of the load shaft decreases rapidly during operation, the magnet rotors move apart from the conductor rotors by a still larger, fully disengaged air gap.
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公开(公告)号：US5489250A
公开(公告)日：1996-02-06
申请号：US201870
申请日：1994-02-25
CPC分类号： A63B22/0257 , A63B22/025 , A63B2225/30 , Y10S482/901 , Y10S482/903
摘要： A high speed deceleration device and method is disclosed that operates on a D.C. speed-change motor used to change the transmission configurations on the transmission of a treadmill powered by a constant speed drive motor. In ordinary use, normal transmission acceleration and deceleration rates are used to speed up or slow down the treadmill belt. A deceleration control signal causes a high voltage to be provided to the D.C. speed-change motor. The high voltage causes the D.C. speed-change motor to rapidly change the transmission configurations on the treadmill which causes a rapid deceleration of the treadmill belt. The deceleration control signal is produced in response to a user direction or in response to the condition of the treadmill. Once the belt has been slowed below a threshold speed, the machine shuts itself off. During the deceleration process, the drive motor of the treadmill continues to provide power to the treadmill belt through the transmission so that the transmission continues to move during the deceleration process.
摘要翻译： 公开了一种高速减速装置和方法，其在用于改变由恒速驱动电动机驱动的跑步机的变速器上的变速器构造的直流变速电动机上运行。 在普通使用中，正常的传动加速和减速速率用于加速或减慢跑步机带的速度。 减速控制信号使直流变速马达提供高电压。 高电压使直流变速电动机迅速地改变跑步机上的传动装置，导致跑步机皮带的快速减速。 减速控制信号响应于使用者方向或响应于跑步机的状况产生。 一旦皮带减速到低于阈值速度，机器自动关闭。 在减速过程中，跑步机的驱动马达继续通过变速器向跑步机皮带提供动力，使得变速器在减速过程中继续移动。
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公开(公告)号：US5290205A
公开(公告)日：1994-03-01
申请号：US790750
申请日：1991-11-08
CPC分类号： A63B22/0257 , A63B22/025 , A63B2225/30 , Y10S482/901 , Y10S482/903
摘要： A control system controls a D.C. speed-change motor to change the transmission configurations on a treadmill transmission powered by an A.C. drive motor. The control system may be either microprocessor based or a system of discrete logical pieces. The control system responds to both the current speed of the treadmill belt and the electrical current drawn by the speed-change motor. The control system uses this information to modulate the duty cycle of voltage pulses sent to the D.C. speed-change motor to power the speed-change motor in response to a determination by the control system that the speed-change motor needs to rotate faster or slower to produce a constant rate of speed change for the treadmill belt. The control system also includes a rapid deceleration system. In response to the user's direction or in response to the condition of the treadmill, the control system sends a high voltage to the D.C. speed change motor to cause it to rapidly change the configuration of the transmission to decelerate the belt.
摘要翻译： 控制系统控制直流变速马达来改变由交流驱动马达驱动的跑步机传动装置上的传动装置。 控制系统可以是基于微处理器的或离散逻辑件的系统。 控制系统响应跑步机皮带的当前速度和由变速马达牵引的电流。 控制系统使用该信息来调制发送到直流变速电动机的电压脉冲的占空比，以响应于控制系统确定变速电动机需要更快或更慢地旋转的速度来为变速电动机供电 以便为跑步机带产生恒定的速度变化率。 控制系统还包括快速减速系统。 响应于用户的方向或响应于跑步机的状况，控制系统向直流变速马达发送高电压，使其快速地改变变速器的构造以使皮带减速。
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公开(公告)号：US5545112A
公开(公告)日：1996-08-13
申请号：US203219
申请日：1994-02-28
CPC分类号： A63B22/0257 , A63B22/025 , A63B2225/30 , Y10S482/901 , Y10S482/903
摘要： A control system controls a D.C. speed-change motor to change the transmission configurations on a treadmill transmission powered by an A.C. drive motor. The control system may be either microprocessor based or a system of discrete logical pieces. The control system responds to both the current speed of the treadmill belt and the electrical current drawn by the speed-change motor. The control system uses this information to modulate the duty cycle of voltage pulses sent to the D.C. speed-change motor to power the speed-change motor in response to a determination by the control system that the speed-change motor needs to rotate faster or slower to produce a controlled rate of speed change for the treadmill belt. The control system also includes a rapid deceleration system. In response to the user's direction or in response to the condition of the treadmill, the control system sends a high voltage to the D.C. speed change motor to cause it to rapidly change the configuration of the transmission to decelerate the belt.
摘要翻译： 控制系统控制直流变速马达来改变由交流驱动马达驱动的跑步机传动装置上的传动装置。 控制系统可以是基于微处理器的或离散逻辑件的系统。 控制系统响应跑步机皮带的当前速度和由变速马达牵引的电流。 控制系统使用该信息来调制发送到直流变速电动机的电压脉冲的占空比，以响应于控制系统确定变速电动机需要更快或更慢地旋转的速度来为变速电动机供电 以便为跑步机带产生控制的速度变化率。 控制系统还包括快速减速系统。 响应于用户的方向或响应于跑步机的状况，控制系统向直流变速马达发送高电压，使其快速地改变变速器的构造以使皮带减速。
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公开(公告)号：US4255646A
公开(公告)日：1981-03-10
申请号：US882974
申请日：1978-03-03
申请人： Jens T. Dragoy , Bruce D. Densmore
发明人： Jens T. Dragoy , Bruce D. Densmore
CPC分类号： F17C7/04 , F17C2201/0109 , F17C2201/035 , F17C2205/018 , F17C2205/0332 , F17C2221/035 , F17C2223/0153 , F17C2223/033 , F17C2225/0123 , F17C2227/0304 , F17C2227/0393 , Y10T137/6606
摘要： A compact, economical electrically heated vaporizer having a fast response time and capable of vaporizing liquified petroleum gas at a rate of ten to forty gallons or more per hour with safety and without excessive superheating and/or cracking of the liquified petroleum gas utilizes a metal casting having a closed internal cavity separated into two chambers by an integral barrier. The casting serves as a pressure vessel and heat sink as well as providing a heated interface between electric resistance heaters received in passageways in the barrier and the liquified petroleum gas. The heat generated by the heaters is disseminated uniformly throughout the casting surrounding the chambers. The liquified petroleum gas inlet at one end of the casing connects with the end of one chamber. Multiple small passageways in the barrier at the other end of the casting connect the other end of the one chamber to the adjacent end of the other chamber. The passageways are configured to create a turbulent flow which improves heat transfer. An outlet connects with the other end of the other chamber for discharge of the vaporized gas. The electrical and temperature controls for controlling the operation of the heaters and the flow of liquified petroleum gas through the chambers are housed within an enclosed chamber formed by an end cover on the other end of the casting. The temperature sensors for the temperature controls are received in passageways in the barrier.
摘要翻译： 一种紧凑，经济的电加热蒸发器，具有快速的响应时间，并且能够以每小时十至四十加仑或更多的速度蒸发液化石油气，安全且没有液化石油气的过度过热和/或裂化。 具有通过整体屏障分离成两个室的封闭内部空腔。 该铸件用作压力容器和散热器，以及在屏障通道和液化石油气中接收的电阻加热器之间提供加热界面。 由加热器产生的热量均匀地散布在围绕室的铸件中。 壳体一端的液化石油气入口与一个室的一端连接。 在铸件另一端处的阻挡物中的多个小通道将一个室的另一端连接到另一个室的相邻端。 通道构造成产生改善热传递的湍流。 出口与另一个室的另一端连接，用于排放汽化气体。 用于控制加热器操作的电气和温度控制以及通过室的液化石油气的流动被容纳在由铸件另一端上的端盖形成的封闭室内。 用于温度控制的温度传感器接收在屏障中的通道中。
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