VARIABLE SPEED DRIVE INPUT CURRENT CONTROL

A chiller assembly is provided. The chiller assembly includes a compressor (102), a condenser (106), an expansion device and an evaporator (108) connected in a closed refrigerant circuit. The chillerassembly further includes a motor (104) connected to the compressor to power the compressor, and a variable speed drive (110) connected to the motor to power the motor. The variable speed drive is operable to provide a variable voltage to the motor and a variable frequency to power the motor. The variable speed drive includes multiple sensors and an input current estimator that determines an estimated RMS input current based on sensor data received from the sensors. The chiller assembly further includes a control panel to control operation of the variable speed drive. 提供了一种冷却器组件。所述冷却器组件包括连接在封闭的制冷剂回路中的压缩机(102)、冷凝器(106)、膨胀装置和蒸发器(108)。所述冷却器组件进一步包括连接至所述压缩机以便为所述压缩机供电的电机(104)、以及连接至所述电机以便为所述电机供电的变速驱动装置(110)。所述变速驱动装置可操作以向所述电机提供可变电压和可变频率来为所述电机供电。所述变速驱动装置包括输入电流估计器和多个传感器，所述输入电流估计器基于从所述传感器接收到的传感器数据来确定估计的RMS输入电流。所述冷却器组件进一步包括控制