The invention provides an intelligent controller used for a
direct current (DC) frequency-conversion air conditioner compressor and a technical proposal of the control method thereof; the hardware proposal comprises a
rectifier filter circuit and a
power module which are electrically connected sequentially; the
rectifier filter circuit (220) is also electrically connected with a single
DSP controller used as a core
processing unit by a switch power supply (240); the single
DSP controller is also respectively and electrically connected with the
power module, a communication isolation circuit which is used for communicating with the indoor
machine of the air conditioner, a fan
driving circuit (280), and a temperature sampling circuit (270); the control method comprises the steps as follows:the
control software is embedded in the
DSP controller; by a control type of dual close-ring FOC no-sensor
magnetic field vector, the current ring at the internal ring realizes the decoupling controlto the
driving current of the permanent magnetic
synchronous motor of a compressor and indirectly controls the output torque of the motor; the speed ring at the external ring is used for controlling the working frequency of the compressor, thus not only meeting the stable requirement during
fixed frequency but also meeting the dynamic response during the
frequency conversion; and the
control software comprises a primitive recursive function and a main interrupt function.