Abstract: A system and method for powered surgical handpiece capable of powering various micro-cutting instruments is described. The system is comprised of a controller adapted for controlling/interfacing with a powered surgical handpiece based upon user-defined procedural information. A data entry device is used for entering the user-defined procedural information used by the controller for configuring and operating the motor control system.

Abstract: An electrical hand-tool device and start-up safety routine protecting against start-up blockages, in which an electrical motor is connected, for a short time span (T0), with the current supply at a determinable resistance. At least one of a limit value (&agr;G) and a shut-off point in time (tA) is determined, for the safety routine in the event of tool blockage, using a measurement of the angle of rotation (&phgr;) of the rotor taken over the time span (T0) dependent on the start-up behavior of a rotor in the time span (T0).

Abstract: An inverter-fed three-phase electrical motor (1) for a household appliance is grounded through a protective conductor (8), with the motor being particularly provided for the direct drive of washing machines. The motor includes a pick-up for high-frequency currents originating from an actuation of the inverter (7) and conducts the currents to one pole of a D.C. voltage supply (13) for the inverter (7) through an ohmic or capacitive shunt path (18-19), with the shunt path leading from a stator (3) of the motor which is installed electrically insulated into the household appliance and is not connected to the protective conductor (8).

Abstract: A solar system for a motor vehicle, which is provided with a solar generator and a DC/DC converter unit, the solar system being switchable for supplying a power consuming device in the motor vehicle or for recharging of the motor vehicle battery. The DC/DC converter unit is made with two poles on the output side and functionally comprises a first and a second DC/DC converter which are respectively optimized with respect to the supply function of the power consuming device and the recharging function, there being a changeover unit which acquires the voltage at the output of the DC/DC converter unit and switches the output depending on the acquired voltage to either the first DC/DC converter or the second DC/DC converter.

Abstract: A speed control device for d-c motors includes an IC control circuit having such a construction that a reference voltage is generated across two of its terminals C and D. Additionally, a current proportional to the armature current of the d-c motor is kept flowing in the terminal D at all times. A transistor is connected across the terminals C and D of the control circuit so that motor revolution can be changed linearly by means of a variable resistor connected in parallel across the base and collector of the transistor. With this arrangement, the revolution of d-c motors can be accurately controlled.