Servo Motor Brakes
Servo motor brakes are a type of Armature Actuated Brake (AAB). Stearns armature actuated brakes are spring-set, electrically released, friction devices, which develop holding and braking torque in the absence of electrical power. This type of brake can
decelerate and hold a rotational load or can be ordered to provide a holding function only, where the motor is used as the dynamic brake.
Servo motor brakes are available to meet a wide range of braking requirements with the option of custom design and modifications.
How to Choose a Servo Motor Brake
Stearns provides servo motor brakes for holding-only applications.
To determine, the right type of servo motor brake, consider:
- System safety requirements
- Power source
- Space available
- The frequency in which the brake will need to start and stop
- Longevity
- Maximum speed
- Maximum load weight
Types of Servo Motor Brakes
There are three different types of servo motor brakes depending on application requirements:
- Holding Servo Motor Brakes
- Dynamic Servo Motor Brakes
- Safety Servo Motor Brakes
How Servo Motor Brakes Work
Stearns offers power-off, spring-set brakes for servo motor applications for system requirements that demand low inertia and high speed operations. Here’s how servo motor brakes function:
- (State #1) Resting Motion: A hub which is attached to the shaft supports the rotatable friction disc. Brake torque is developed when springs apply a clamping force between the brake armature, friction disc and pressure plate.
- (State #2) Electrical Power-On: When electrical power is applied, the armature is pulled by the electromagnetic force in the magnet body assembly which overcomes spring action allowing the friction disc to rotate freely.
- (State #3) Electrical Power-Off:When electrical power is interrupted, the electromagnetic force is removed and the pressure spring will mechanically force the armature plate to clamp the friction disc between itself and the pressure plate, thereby torque is developed.
Use Cases for Servo Motor Brakes
Servo motor brakes are often used in vertical-axis applications and are used in various marine, mining brakes, & encoder brake applications including spring-set electrically released armature actuated brake series 310 & 311.
Benefits of Stearns Servomotor Brakes
Stearns servomotor brakes offer a compact spring set, power-off brake, designed to hold the driven load or to provide dynamic braking. Servo motor brakes from Stearns deliver high torque in a compact package for servo and stepper motor applications.
- Low backlash
- Class H insulation
- Corrosion resistant finishes
- Low inertia rotating parts
- Splined hub for quiet dependable operation
Features
- Flexible Torque Sizing: Sizes ranging from 8 to 400 lb-in, (.9 to 45.2 Nm) of torque
- Dynamic Mounting Options: including face mounting through a short hub for maximum efficiency
- Class H Insulation: designed with materials available in: silicone elastomer, mica, glass fibre, asbestos, and more
Easy Maintenance
Servo motor brake cleaning, realignment, and load testing is easy with Stearns servo motor brakes due to quick disassembly and seamless wire disconnection.
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