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In most cases, an electronic controller is needed to operate a micromotor. It allows the drive power to be precisely controlled, as it is required by the application. DC motor controllers from FAULHABER ensure especially efficient operation as well as high precision when implementing the specified values, such as speed and position. They are available as speed controllers, motion controllers and stepper controllers. Their function is optimized for combination with FAULHABER motors.
The electronic controller enables the precise control of speed and torque. A feedback channel supplies signals from the application for this purpose, thereby allowing the current behavior of the application to be incorporated in addition to the set-points. The DC motor controller also protects the motor and the electronics from excessive loading and reaching temperatures that are too high. Brushless DC motors (BLDC motors) can, in any case, only be operated with a controller as this is needed for generating the rotating field. Here, it controls the sequence of the phase-shifted alternating fields that put the rotor into motion.
DC motors can, in principle, also be operated without a controller. Their speed can be controlled simply by changing the voltage – the higher the voltage, the faster the speed. In partial-load operation, this type of control is, however, very inefficient and causes high losses. Such losses can be eliminated by a DC motor controller with pulse width modulation (PWM): The supply voltage that reaches the motor is switched on and off in rapid alternation by the control electronics. The motor power is changed by the variation in the pulse length: the longer the pulse is switched on, the higher the power. Through the PWM actuation of the motor, low-loss and effective operation is achieved.
Speed controllers can precisely control the motor speed of DC motors and brushless motors from FAULHABER. They are used primarily in applications with speed-controlled operation. With these devices, the type and scaling of the set-point specification, the operating mode as well as the controller parameters can be adjusted.
With DC motors, brushless motors and linear motors from FAULHABER, motion controllers can control not only the speed and torque but also the axis position. They work in 4-quadrant operation and can perform precise positioning tasks. Thanks to their built-in interfaces, they can be integrated in networks and connected to a PC as well as to all typical industrial controllers.
The stepper motor controller enables the actuation of most of the stepper motors from FAULHABER. It can work in micro-stepping operation with up to 256 micro-steps per full step and control multiple axes with connected cards. It is intended to be used as an evaluation PCB for development tasks and for simple commissioning.
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Dr. Fritz Faulhaber GmbH & Co. KG
Faulhaberstraße 1
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