There are generally three ways to brake a speed reducer in an emergency stop: mechanical braking, generator braking, and reverse braking. Among them, reverse braking is the fastest. Let's take a look at the requirements for this braking method.
1. To effectively solve the problem, it is necessary to understand the characteristics of the reducer load and the specific requirements for its use.
2. The motor drive circuit controlled by the microcontroller needs to have a power reverse function, such as a bridge circuit composed of 4 transistors, or a forward and reverse circuit composed of relays.
3. When braking is required, the control circuit will short-circuit and switch to motor reverse mode. When the motor speed drops to 0, power supply will be stopped to reverse the circuit, and the motor will stop. It should be noted that due to load variations, the time required for the motor speed to drop to 0 after reversing the circuit is not constant.
In addition, the speed reducer needs to be equipped with a speed sensor; otherwise, more complex control technology, such as adaptive control, is required. You need to master this technology to operate the gear reducer professionally.