Workings of Motor Controllers

Autoclavable controllers for BLDC

Autoclavable controllers for BLDC Slotted and Slotless sterilizable motors

Electronic commutation is needed to run BLDC motors. To drive a BLDC motor the mandatory requirement is the rotor position. This information is normally extracted from the Hall sensors or the encoders in the sensored controllerss. In the sensorless controllers, the rotor position is estimated by specific algorithms based on current and voltage feedback.There are 2 types of major commutations methods are used to run the BLDC motor - Six step commutation and sinusoidal commutation.

Autoclavability for controllers is a requirement in certain surgical handtool applications identfied by Portescap and hence Portescap's has designed autoclavable controllers that can withstand up to 1,000 sterilization cycles and are fully compatible with Portescap's SMS BLDC slotted and BLDC slotless range of sterilizable motors. These autoclavable controllers are perfectly suited to drive battery-powered surgical hand tools.


Drive Motors Characteristics Advantages
CNT 1530 SMS BLDC Slotted Sensored
9-15 VDC,
20A Continous current
18khz PWM frequency
1000 Autoclave cycles
Small size
Speed and direction control
CNT 2440 SMS BLDC Slotted and Slotless Sensored
5-24 VDC,
40A Continous current
60khz PWM frequency
1000 Autoclave cycles
Ease of installation
Boost capability/fast and low decay mode
Small size
Speed and direction control
EDM-453 Steppers and DLA Peak current 3A
Peak Voltage 45V
Number of microsteps:
1, 2, 4, 8, 16, 32, 64
PWM 35Khz
Easy to drive stepper motors
Easy to select current and number of steps
Boost capability/fast and low decay mode
Small package
Robust design
Dynamic torque available with PCAP motors
Short circuit protection


Custom Design Drivers