Tic
Motor tics are movement-based tics affecting discrete muscle groups.
Power band
Electric motors are unique in many ways, especially when it comes to the power band. The exact characteristics vary greatly with the type of electric motor. The maximum torque of a universal motor (vacuum cleaner, small machines, drills, starter motors) occurs at zero rotation rate (when stalled) and falls for higher RPM. For induction motors connected to a fixed frequency AC source (most common in large applications), the maximum torque is usually just below the synchronous RPM, sinks to zero for this RPM and becomes negative above it (induction generator); at low RPM the torque is usually slightly lower. Synchronous motors can be used only at one to the AC source synchronous velocity. In modern applications, synchronous and induction motors with electronic control of the frequency are used, e.g., Brushless DC electric motors. In this case, unless external limitations are applied, the maximum torque is achieved at low RPM.