Bldc Motor Driver Circuit Design

Figure 2 shows actual size single side pcb design for the bldc motor driver circuit.

Bldc motor driver circuit design.

As shown in the bldc motor driver circuit place all the components in the assigned order and avoid any possible errors which may degrade the implementation process. The second circuit which forms the main driver configuration for the proposed 3 phase brushless bldc motor driver circuit could be also seen having a current sensing stage across its lower left section. Construction of bldc motor driver circuit. The main design difference between a brushed and brushless motors is the replacement of mechanical commutator with an electric switch circuit.

A simplified drive circuit is shown in figure 3. Therefore this chapter will focus on the design and implementation of a motor drive as well as its realization of control algorithm. Keeping that in mind a bldc motor is a type of synchronous motor in the sense that the magnetic field generated by the stator and the rotor revolve at the same frequency. Individual drive controls for the high and low drivers permit high drive low drive and floating drive at each motor terminal.

A brushless dc electric motor bldc motor or bl motor also known as electronically commutated motor ecm or ec motor and synchronous dc motors are synchronous motors powered by direct current dc electricity via an inverter or switching power supply which produces electricity in the form of alternating current ac to drive each phase of the motor via a closed loop controller. Brushless dc motor bldc and permanent magnet ac synchronous motors drives have many advantages such as high efficiency small size less rotor losses and fast torque response over the induction motor drives. Figure 3 depicts component layout for the same. One precaution that must be taken with this type of driver circuit is that both high side and low side drivers must never be activated at the same time.