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发明授权
CN107270599B 变频驱动器的控制与操作 有权

变频驱动器的控制与操作
摘要：
公开了阻止、限制和/或防止不合需要的或不受命令的压缩机旋转的独特的装置、方法和系统。一个典型的实施例是HVACR系统，其包括变频驱动器，变频驱动器配置成驱动电动机，从而使螺杆式压缩机或螺旋压缩机旋转。控制器配置成监测该系统的各个方面并控制驱动器。当识别到指示潜在的不合需要的或不受命令的压缩机旋转的状况时，控制器命令变频驱动器控制电动机，从而限制和优选防止压缩机旋转。一种技术包括使驱动器的开关短路至DC总线轨道上，从而容许电动机绕组中的反电动势感应电流通过绕组阻抗进行耗散，因而提供了阻尼力。另一技术包括控制逆变器，以便使DC电流插入到电动机中，从而造成电动机对准到特定的位置并保持特定的位置。
摘要（英）：

A system includes a refrigerant circuit including a compressor, a condenser, an expander, an electric motor configured to drive the compressor, and a controller configured to control a motor drive to drive the electric motor. The controller is configured to first evaluate whether the compressor is idle based upon a control state of the controller being configured not to operate the motor drive to drive the motor, second, in response to an affirmative evaluation that the compressor is idle, evaluate a risk of undesired or un-commanded compressor rotation based upon a combination of two or more system conditions, each of the two or more system conditions indicating the risk of undesired or un-commanded compressor rotation, and third, in response to an affirmative evaluation of the risk of undesired or un-commanded compressor rotation, control the motor drive to oppose rotation of the compressor.

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