Abstract: A DC motor assembly (10) with soft starting capability is provided. The assembly (10) comprises a DC motor (12) including an armature (14) and a field winding (16) adapted to be excited separately from the armature; and circuitry configured to controllably increase current flow through the field winding of the DC motor as a function of time during starting of the DC motor.

Abstract: An optical system driving device is provided. This optical system driving device includes a driving unit for driving an optical system, and a controller for controlling the driving unit so as to create an easement interval for temporarily easing the acceleration during an acceleration period. The optical system reaches a predetermined running velocity at the end of the acceleration period.

Abstract: The present invention regards an electronic device for controlling the electromagnetic self-braking current in reversible rotating electric commutator machines, fitted with an inductor winding and an armature winding, in which there are reversing means to control the functioning of the electric machine as a generator by mutual inversion of the polarity of said inductor winding and said armature winding. The device includes a switchable current control circuit and an excitation circuit distinct from each other. The control circuit includes an electric load, a power device for connecting and disconnecting said electric load in series in the input circuit of said inductor winding to dissipate the power produced by said electric machine when it functions as a generator, and a variable duration pulse generator for controlling the switching of said power device.