Application of regenerative braking motors

The AC brake motor is a totally enclosed, self-ventilated, squirrel-cage, three-phase asynchronous motor with an additional disc DC brake. It consists of a DC disc electromagnetic AC brake motor between the rear cover and fan of the Y-series motor and is a derivative product of the Y-series.

        AC brake motor is a totally enclosed self-fan cooled squirrel cage three-phase asynchronous motor with an additional disc DC brake. It is composed of a DC disc electromagnetic AC brake motor between the rear end cover and the fan of a Y series motor, and is a derivative product of the Y series.

 　　

  The DC disc brake used for AC brake motors is installed on the end cover of the motor's non-shaft extension end. When the AC brake motor is connected to the power supply, the AC brake motor also operates simultaneously. Due to electromagnetic attraction, the electromagnet attracts the armature and compresses the spring, the brake disc separates from the armature end cover, and the AC brake motor starts to run. When the power is cut off, the electromagnet of the AC brake motor loses its magnetic attraction, and the spring pushes the armature to press the brake disc. Under the action of friction torque, the AC brake motor stops running immediately; at the same time, corresponding YDEJ dual-speed (multi-speed, remote pole ratio) motors are also produced. The power supply for the AC brake motor is provided by the rectifier inside the motor's terminal box, which is AC220V-DC99V for 3kW and below, and AC380V-DC170V for 4kW and above (in special cases, such as (DC24V) designed according to manufacturer's requirements) → Yej series electromagnetic brake motors can achieve rapid braking after the motor is powered off. The fast braking time for YEJ2-63-90 motors is less than 0.15 seconds, and for YEJ-100-160 motors is less than 0.20 seconds. AC brake motors can achieve slow braking by changing the wiring of the terminal box according to user requirements. This series of motors has low noise and reliable braking performance. Its working principle is: when the AC brake motor is energized, the AC brake motor rectifies 220V AC to 198V DC, and then the armature is electromagnetically attracted, making the brake disc in a rotatable state, and the brake motor rotates freely. When the brake motor is powered off, the electromagnet is de-energized, and the armature immediately receives resistance from the spring, causing the brake disc to press against the motor's rear end cover, stopping rotation.

        

  Applications of AC brake motors

  AC brake motors comply with the JB/T6456-1992 standard and are widely used in various mechanical equipment and transmission devices that require rapid stopping and positioning. They are widely used in woodworking machinery, chemical machinery, packaging machinery, metal processing machine tools, food machinery, textile machinery, construction machinery, and gear reducers.

  AC brake motors are widely used in industrial control, primarily generating rotation and torque to drive load rotation. When the motor is disconnected from the power supply, the motor will be affected by rotor inertia and load inertia.

  Now, AC brake motor will continue to rotate for a period of time, and this excess rotational torque caused by inertia is not allowed in some applications.