Brushless DC Motor Controllers

Our motor controller offerings are staggered, each cost-optimized design is intended to support motors at different power levels and input voltages. All of our controllers are designed with the same functions to operate BLDC motors with precision. Speed control is available with a built-in RV potentiometer for closed loop circumstances, but our controllers are compatible with other micro-controllers and external pulse-width modulation (PWM) in open loop systems to achieve speed, position control. In addition to working with micro-controllers, we have implemented provisions for external components such as potentiometers, for motor speed adjustments.

Our controllers are designed with Digital Signal Processing (DSP) technology, which allows for high switching frequency, low noise, and high precision. Position detection relies on hall-effect signals from the BLDC motor. They are designed in compact packaging, with over-load protection circuitry and aluminum heat-sinks to reduce the chances of damaging your motor/controller.

BLDC Motor Control Fundamentals

A controller can start/stop a motor, change rotation direction and regulate a motors rotational speed to keep it operating at maximum efficiency or at a certain torque output. Brushless motors cannot operate without a driver or controller. Unlike the mechanical system found in brushed DC motors, brushless DC motors rely on electronic commutation to drive and regulate the motors operation. BLDC motors are typically constructed with three hall effect sensors that detect rotor position and relays positioning information to the controller. Electronic commutation is then achieved by the controller enabling the switching of phase currents to motor (stator) windings relative to rotor position. This form of commutation is one of the advantages of brushless motors, allowing them to operate more efficiently and generate lower levels of EMI compared to brushed motors. A quality controller is important for smooth operation and output power.

Three-Phase Power System

Most brushless motors are considered to be three-phase brushless DC motors. This simply means they are configured with a three-phase power systems to achieve synchronous operation. The three phase windings in the stator are wound 120° apart from one another. A motor speed controller will know when to excite each phase winding according to the rotors position. Depending on the manufacturer or design of a particular brushless dc motor controller, the method in which the controller interprets the rotors position may differ. It’s important to understand the type of motor your looking to control. An ISL Products brushless motor controller will rely on Hall-effect sensors for this feedback.

If you are searching for a motor drivers to control stepper motors, please contact us for assistance. We can provide stepper motor drivers for applications as well.

We typically have our controllers and drivers readily available to help our customers with a quicker time to market.