Patent ID: 9722527
Date: 2017-08-01
CPC Classifications: H02P

Claim:
1. A power supply system for an electric motor comprising: a power circuit, the input terminals of which are connected to a DC voltage source; an electronic circuit for controlling the electric motor depending on a control signal representing a set speed of the motor; a MOSFET transistor forming a safety switch which, in a closed position, allows connection of the power circuit to said DC voltage source; and a controller that controls a gate of the MOSFET transistor able to set said transistor in the closed position in a saturated operation mode for a set speed higher than said threshold speed, or in a closed position in a linear operation mode for a set speed less than a threshold speed, wherein the MOSFET transistor is able to reduce the value of the DC voltage received by the power circuit during starting of the electric motor and/or during the operating phases where the set speed of the electric motor is less than the threshold speed.