Motor control device for achieving safe and efficient braking and motor braking method thereof

A method for braking a motor, the motor being coupled to a motor control device, the motor control device comprising a set of high-side switches, a set of low-side switches, a capacitor and a controller, the set of high-side switches and the set of low-side switches being coupled to the motor, the capacitor being coupled to the set of high-side switches, the controller being coupled to the capacitor, the set of high-side switches and the set of low-side switches, the method comprising:

• after the motor is disconnected from an external power supply, the controller receiving a supply voltage from the capacitor, turning on the set of low-side switches, and turning off the set of high-side switches;
• determining whether the supply voltage is less than a first target voltage;
• and
• if the supply voltage is less than the first voltage, the controller turning off the set of low-side switches and turning off the set of high-side switches.