First of all, there must be a power supply: if you buy someone else's switching power supply, there are several electrolytic capacitor filters on the line, or their own design of the switching power supply board; The second is the three-phase bridge MOS tube or IGBT; Then you may have to add L or LC filters; These are the main circuit parts; Control circuit:
1, control power supply, 5V, 3.3V and so on;
2, sampling circuit: the Hall sensor of the motor samples 3 Hall signals you want to take him over, you can choose the optical coupling isolation or magnetic coupling isolation or use the op amp conversion or other ways, connected to the cap pin of the DSP; Voltage, current signals you need to have AD op-amp circuit, including proportional amplification, low-pass filtering and the like;
4, DSP and communication: DSP choice is the same, the peripheral circuit components and parameters of its design. Including crystal oscillator, JTAG, decoupling capacitor, AD part of the external components. Need to find these information PDF, there are official official documents on the official website very authoritative. Communication choose 232 on the line, if there are requirements can get some USB what to choose.
5, protection: the main road may have to add a fuse or something, optional. Then the MOS tube on the three-phase bridge might need to add some absorption capacitance. These are all optional. If you're doing it for the first time, and you're just experimenting on your own rather than making a product to sell to someone else, you can skip this.