The new sensorless drives feature a PWM frequency of 56 k for cool motor operation.

Koford Engineering LLC (Winchester, OH) has introduced a new line of compact high efficiency sensorless drives for operation for 12 to 60 volt applications, with current up to 5 amps. Features include:

• An efficiency up to 99 percent.
• A PWM frequency of 56 k for cool motor operation. 
• Can operate low inductance slotless motors without requiring any external inductance.  Open loop, and digital closed loop versions are available. 
• Tach and phase current output signals are also available. 
• Can be operated in stand alone mode, or controlled by a 0-5 V voltage or 5 V pwm input. 

For more information visit www.koford.com