Atherectomy motor control system with tactile feedback

An atherectomy system, comprising:

• a drive motor adapted to rotate a drive cable, the drive motor operably coupled to an atherectomy burr;
• a control system adapted to regulate operation of the drive motor, the control system further adapted to:
• provide the drive motor with a high frequency pulse width modulation (PWM) drive signal in order to operate the drive motor;
• monitor a torque exerted by the drive motor;
• monitor a speed of the drive motor;
• add a low frequency PWM signal to the high frequency PWM drive signal when the torque approaches a torque threshold and/or when the speed approaches a speed threshold, thereby causing the drive motor to produce a tactile signal that signals to the user that the torque is approaching the torque threshold and/or the motor speed is approaching the speed threshold.

A control system for an atherectomy system including a drive motor adapted to rotate a drive cable, the drive motor operably coupled to an atherectomy burr, the control system comprising:

• an input adapted to receive an indication of a motor performance parameter;
• an output adapted to output a high frequency pulse width modulation (PWM) drive motor signal to the drive motor;
• a controller operably coupled to the input and to the output, the controller adapted to provide to the output the high frequency PWM signal for operating the drive motor;
• the controller further adapted, when the motor performance parameter approaches a limit of a performance range, to add a low frequency PWM signal to the high frequency PWM drive signal that is provided to the drive motor via the output, thereby causing the drive motor to produce a tactile signal that signals to the user that the motor performance parameter is approaching the limit of the performance range.