System for controlling the speed of a motor of an electric...

Details System for controlling the speed of a motor of an electric... System for controlling the speed of a motor of an electric...

2006-06-13

2006-06-13

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

C363S026000, C363S041000

Reexamination Certificate

active

07061201

ABSTRACT:
The invention relates to a system for controlling the speed of a motor (1) of an electric fan unit comprising a field-effect transistor (3) that controls the motor (1) using pulse-width modulation, the field-effect transistor (3) being connected to a circuit (5) comprising a voltage source (7) and a resistive element (9) in series, the circuit (5) is connected between the gate (G) of the field-effect transistor (3) and a second source (S2) that is connected to a first source (S1) of the field-effect transistor (3), via an inductor (11) in order to allow a reduction in the slope of the current as the field-effect transistor (3) switches.

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