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    • 3. 发明申请
    • SAFE CONTROL OF A BRAKE USING LOW POWER CONTROL DEVICES
    • 使用低功率控制装置制动器的安全控制
    • US20110094837A1
    • 2011-04-28
    • US12999239
    • 2008-06-17
    • Juergen GewinnerMarvin Dehmlow
    • Juergen GewinnerMarvin Dehmlow
    • B66B1/38H02M3/335F16D65/16
    • B66B1/32H02M3/33523
    • A control circuit selectively energizes a load, such as an elevator or escalator brake (28). The circuit includes a transformer (12) with a primary-winding connected to a series with a semiconductor switch (40) that is driven by a pulse width modulation (PWM) controller. Power to the PWM controller is supplied through safety relay contacts (52A, 52B). When the load is to be energized, the safety relay contacts are closed and the PWM controller drives the semiconductor switch to supply energy through the transformer to the secondary circuit. A command signal to secondary circuitry (64) causes power in the secondary to be applied to the load (12). If the safety relay contacts open, the PWM controller turns off and power is no longer delivered to the secondary circuit and the load.
    • 控制电路选择性地给负载(例如电梯或自动扶梯制动器(28))通电。 该电路包括一个变压器(12),其初级绕组连接到由脉冲宽度调制(PWM)控制器驱动的半导体开关(40)的串联。 PWM控制器的电源通过安全继电器触点(52A,52B)提供。 当负载通电时,安全继电器触点闭合,PWM控制器驱动半导体开关,通过变压器向次级电路供电。 对次级电路(64)的命令信号使二次侧的电力施加到负载(12)。 如果安全继电器触点断开,PWM控制器关闭,电源不再传送到次级电路和负载。
    • 6. 发明授权
    • Safe control of a brake using low power control devices
    • 使用低功率控制装置安全控制制动器
    • US08585158B2
    • 2013-11-19
    • US12999239
    • 2008-06-17
    • Juergen GewinnerMarvin Dehmlow
    • Juergen GewinnerMarvin Dehmlow
    • B60T8/78
    • B66B1/32H02M3/33523
    • A control circuit selectively energizes a load, such as an elevator or escalator brake (12). The circuit includes a transformer (28) with a primary-winding connected to a series with a semiconductor switch (40) that is driven by a pulse width modulation (PWM) controller. Power to the PWM controller is supplied through safety relay contacts (52A, 52B). When the load is to be energized, the safety relay contacts are closed and the PWM controller drives the semiconductor switch to supply energy through the transformer to the secondary circuit. A command signal to secondary circuitry (64) causes power in the secondary to be applied to the load (12). If the safety relay contacts open, the PWM controller turns off and power is no longer delivered to the secondary circuit and the load.
    • 控制电路选择性地给负载(例如电梯或自动扶梯制动器(12))通电。 该电路包括一个变压器(28),一个初级绕组与一个由脉冲宽度调制(PWM)控制器驱动的半导体开关(40)串联连接。 PWM控制器的电源通过安全继电器触点(52A,52B)提供。 当负载通电时,安全继电器触点闭合,PWM控制器驱动半导体开关,通过变压器向次级电路供电。 对次级电路(64)的命令信号使二次侧的电力施加到负载(12)。 如果安全继电器触点断开,PWM控制器关闭,电源不再传送到次级电路和负载。