| 摘要 |
<p>The present invention provides a device and method for protecting the motor of a hermetic refrigeration compressor. The device comprises a motor (22), input power lines (26), and a motor protector (24) connected to the input power lines to control the power to the motor. The motor protector includes a microprocessor (34), an input power measurement device (30, 32), and a switch means (38) for controlling the connection of the power lines to the motor. The microprocessor includes memory (36) having instructions for storing an operating input power limit range based on the torque limits of the motor and for comparing the power input signal to the operating input power limit range of the motor. The microprocessor (34) controls the switch means (38) to open when the input power signal is outside of the operating input power limit range of the motor. <IMAGE></p> |
