| 摘要 |
A portable ventilator apparatus comprises a compressor, a brushless direct current (BLDC) motor, and sensors that provide analog signals representative of an angular position of said BLDC motor so that the angular position or an angular speed of said BLDC motor is computed by a computation circuit. A speed control servo drives said angular speed of the BLDC motor to a command speed provided to said computation circuit. An analog to digital converter is directly coupled with said sensors, directly receives the analog signals provided by said sensors, converts the analog signals to digital signals, and outputs the digital signals. A processor receives the digital signals, generates control signals based on the digital signals, and provides the control signals to a three phase inverter that generates drive signals to control said BLDC motor. |
