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21. 发明授权

US06775468B2 Dishwasher pump drive 失效
标题翻译：洗碗机泵驱动
公开(公告)号：US06775468B2
公开(公告)日：2004-08-10
申请号：US10216937
申请日：2002-08-12
申请人： Michael Zinke , Werner Kaps , Thomas Schlosser , Pietro Navarra , Bruno Greco
发明人： Michael Zinke , Werner Kaps , Thomas Schlosser , Pietro Navarra , Bruno Greco
IPC分类号： H02P506
CPC分类号： H02P6/14
摘要： For their pump drive dishwashers are usually equipped for reasons of cost only with an unregulated asynchronous motor which however is temperamental in terms of the sealing requirements involved, and a simple controller operating circuit (13) for executing the functional program because a rotary speed-controllable drive could not comply with the price limit which is preset by the market. However rotary speed control would be highly desirable in terms of the level of efficiency, energy demand and the generation of noise. In order to embody a dishwasher with a pump drive which involves a low level of wear and which is controllable in respect of its rotary speed without a substantial increase in cost, the use of a dc motor (11) with field windings (19) which can be alternately supplied with current by way of sensor-controlled switching sections (34) is an optimum. In that case a commutator (18) which is responsive to the polarity of the multi-pole permanent-magnetic rotor (17) which is supported in the form of a wet rotor member in the air gap predetermines which of the field windings (19) is to be actuated at the time. Hum phenomena by virtue of the residual ripple of the dc field voltage can be compensated by superimposition of pulse width modulation, in opposite relationship to the variation in amplitude. Such compensation is unnecessary however if pure rotary speed regulation is not effected by way of the controller (14), but infraposed current regulation is afforded for operation at a constant torque at the predetermined rotary speed. This additional circuit (20) for actuation of the field windings (19) is advantageously fitted directly to the motor (11) and in turn actuates it substantially by way of the previous interfaces from the operating circuit (13) which has remained practically unchanged.
摘要翻译：对于他们的泵驱动来说，洗碗机通常是配备成本的原因，只是因为不稳定的异步电动机在所涉及的密封要求方面是气质的，而简单的控制器操作电路（13）用于执行功能程序，因为旋转速度可控制驱动器不符合市场预设的价格限制。然而，在效率水平，能量需求和噪声的产生方面，旋转速度控制是非常需要的。为了体现具有泵驱动器的洗碗机，其涉及低水平的磨损并且相对于其转速可以控制，而不会显着增加成本，使用具有励磁绕组（19）的直流电动机（11）可以通过传感器控制的切换部分（34）交替地提供电流是最佳的。在这种情况下，响应于在气隙中以湿转子构件的形式被支撑的多极永磁转子（17）的极性的换向器（18）预先确定了哪个励磁绕组（19）当时被启动。可以通过叠加脉冲宽度调制来补偿由于直流场电压的残余纹波引起的谐波现象，与振幅的变化相反。这样的补偿是不必要的，但是如果没有通过控制器（14）实现纯粹的旋转速度调节，而是以预定转速在恒定转矩下进行下降的电流调节。用于致动励磁绕组（19）的该附加电路（20）有利地直接安装到电动机（11），并且基本上通过已经保持几乎不变的操作电路（13）的先前接口来致动它们。

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