How to increase the deceleration time of a brushless motor controller?

There are many types of motors, but their working principles are all based on the laws of electromagnetic induction and electromagnetic force. Therefore, the general principle of their construction is to use appropriate magnetic and conductive materials to form magnetic circuits and electrical circuits that mutually induce electromagnetic forces, thereby generating electromagnetic power and achieving energy conversion. Based on their starting and running methods, motors can be classified into capacitor-start single-phase asynchronous motors, capacitor-run single-phase asynchronous motors, capacitor-start-run single-phase asynchronous motors, split-phase single-phase asynchronous motors, and three-phase motors.

Based on the rotor structure, motors can be classified into squirrel-cage induction motors (the type you are using, formerly called squirrel-cage asynchronous motors) and wound-rotor induction motors (formerly called wound-rotor asynchronous motors). The squirrel cage is simply a closed coil.

(1) When a three-phase asynchronous motor is connected to a three-phase AC power supply (each phase differing by 120 electrical degrees), the three-phase stator windings generate a three-phase magnetomotive force (stator rotating magnetomotive force) through which three-phase symmetrical currents flow, producing a rotating magnetic field. This magnetic field rotates clockwise at synchronous speed along the inner circle of the stator and rotor.

(2) This rotating magnetic field has relative cutting motion with the rotor conductors. According to the principle of electromagnetic induction, the rotor conductors (the rotor windings are a closed circuit) generate an induced electromotive force and an induced current (the direction of the induced electromotive force is determined by the right-hand rule).

(3) According to the law of electromagnetic force, under the action of the induced electromotive force, an induced current will be generated in the rotor conductors, with the direction being basically the same as the induced electromotive force. The current-carrying rotor conductors are subjected to an electromagnetic force in the magnetic field generated by the stator (the direction of the force is determined by the left-hand rule). The electromagnetic force forms an electromagnetic torque on the motor rotor shaft, driving the motor rotor to rotate along the direction of the rotating magnetic field. When the motor shaft carries a mechanical load, it outputs mechanical energy. Since the magnetic flux without the short-circuit ring leads the magnetic flux with the short-circuit ring, the direction of motor rotation is the same as the direction of the rotating magnetic field.