EC Motors – or electrically commutated motors – are a specific version of the brushless DC motor but differ because they are low horsepower with integrated drives. These motors are great for HVAC applications and those with lower budgets for controllers.EC Motors motors differ from PSC blower motors because PSC motors use a single-phase design (driven by one AC current, not three), and while they are primarily used in HVAC applications, they offer great benefits.
When it comes down to your application, needs, and budget, EC Motors motors provide a more powerful output than PSC motors and can be better controlled for speed and torque, with efficiency and noise reduction.
PSC (permanent-split capacitor) motors rely on two starter windings that create a rotating magnetic field (RMF), producing torque that turns the motor shaft. Once the capacitor starts, a centrifugal switch opens, disconnecting it and allowing the motor to run using the run winding.
There are some advantages to using a permanent-split capacitor AC motor, including its efficient design. These high-efficiency gearmotors don’t require a centrifugal switch, and the pullout torque is higher. Additionally, the capacitor is permanently connected to the circuit, giving it a higher power output.
EC Motors motors are often about 20% more efficient than typical PSC motor designs. Their efficiency output tends to be around 80%, whereas most PSC designs have an efficiency rating of 60%.