Features | Electromagnetic Brake Motors

This is a mechanical brake motor with a power off activated type electromagnetic brake. The motor shaft can be stopped as soon as the power is turned OFF, such as during a power failure.
Ideal for applications that require load holding, such as vertical operation.

Suitable for applications to reduce the overrun and provide instantaneous stop of electromagnetic brake motors. The brake pack SB50W is equipped with a function that can output an alarm signal when the thermal protector built into the motor is activated.

By combining the motor and gearhead, it is possible to reduce the speed to the desired speed or increase the torque.

The electromagnetic brake motor is equipped with a power off activated type electromagnetic brake for braking. An example of the structure is shown in the figure on the right. When voltage is applied to the exciting coil (①), the armature (③) is attracted to the electromagnet in resistance to the coil spring (②) and the brake is released, allowing the motor shaft to rotate freely. When no voltage is applied, the armature (③) is released and the coil spring (②) causes the brake lining (⑤) to press against the brake hub (④), holding the motor shaft in place.

This chart shows the relationship between the inertia and braking characteristics of the electromagnetic brake motor (braking time and overrun). Braking time and overrun represent the time and overspeed (overrun) from the moment the power is turned off until the motor stops. In the case of 25 W, when operating with an inertia converted to the motor shaft of 0.3 [×10^-4kgm²], the braking time will be 140 msec and the overrun will be 2.4 revolutions.