Abstract: A switching control board includes an outdoor unit communication module configured to establish a communication connection between the switching control board and an outdoor unit of an air conditioning system, a detection module configured to detect a type of an indoor device of the air conditioning system that is connected to the switching control board, and a control module connected to the outdoor unit communication module and the detection module. The control module is configured to obtain a control parameter based on the type of the indoor device and send the control parameter to the outdoor unit via the communication connection between the switching control board and the outdoor unit to control the outdoor unit.

Abstract: A motor control system includes a plurality of inverters each configured to be connected to a corresponding one of a plurality of motors, a plurality of current samplers coupled to the plurality of inverters, respectively, and each configured to sample a phase current of a corresponding one of the plurality of motors to generate a phase current signal for the corresponding one of the plurality of motors, and an operation controller including an analog-digital (AD) sampling circuit. The operation controller is configured to synchronously generate a plurality of triangular carrier signals each corresponding to one of the plurality of motors, and sample the phase current signals of the plurality of motors in a time sharing manner through the AD sampling circuit in rising half cycles or falling half cycles of the plurality of triangular carrier signals, respectively.

Abstract: A motor control system includes a plurality of inverters each configured to be connected to a corresponding one of a plurality of motors, a plurality of current samplers coupled to the plurality of inverters, respectively, and each configured to sample a phase current of a corresponding one of the plurality of motors to generate a phase current signal for the corresponding one of the plurality of motors, and an operation controller including an analog-digital (AD) sampling circuit. The operation controller is configured to synchronously generate a plurality of triangular carrier signals each corresponding to one of the plurality of motors, and sample the phase current signals of the plurality of motors in a time sharing manner through the AD sampling circuit in rising half cycles or falling half cycles of the plurality of triangular carrier signals, respectively.