US 2022/0045637 A1 · METHOD FOR CONTROLLING AN ELECTRIC ROTARY MACHINE OPERATING AS A GENERATOR AND CORRESPONDING CONTROL SYSTEM FOR REDUCING THE VOLTAGE IN THE NETWORK IN THE EVENT OF A CUTOFF

Abstract

A method for controlling a multi-phase rotary electric machine is disclosed. The stator of the machine is controlled by a control bridge having a plurality of parallel mounted switching arms, with each arm comprising a high-side switch and a low-side switch connected at a center tap connected to a phase of said rotary electric machine. The machine operates as a generator and is connected to an electrical network on board a motor vehicle. The method involves short-circuiting a phase winding of the stator when a measurement of the voltage of said network exceeds a first predetermined value, and after this, activating a switching arm, the center tap of which is connected to said at least one short-circuited phase winding, during which the intensity in the short-circuited winding is measured, if the measured intensity is positive, the high-side switch of said activated switching arm is moved to the closed position, otherwise, it is moved to the open position.

Claims9

Dependent claims

A method for controlling a multi-phase rotary electric machine, the stator of which is controlled by a control bridge comprising a plurality of parallel mounted switching arms, with each arm comprising a high-side switch and a low-side switch connected together at a center tap, which is connected to a phase of said rotary electric machine, said rotary electric machine operating as a generator and being connected to an electrical network on board a motor vehicle, said method comprising:

short-circuiting at least one phase winding of the stator when measurement of the voltage of said network exceeds a first predetermined value;
and
following the short-circuiting, activating a switching arm, the center tap of which is connected to said at least one short-circuited phase winding, during which:
the intensity in the short-circuited winding is measured;
if the measured intensity is positive, the high-side switch of said activated switching arm is moved to the closed position;
otherwise, the high-side switch of said activated switching arm is moved to the open position.

3 more elements

A control system for a multi-phase rotary electric machine operating as a generator and connected to an electrical network on board a motor vehicle by a first and a second power supply terminal, said control system comprising:

a control bridge comprising a plurality of parallel mounted switching arms, with each arm comprising a high-side switch and a low-side switch connected together at a center tap, which is connected to a phase winding of said rotary electric machine, said control bridge being capable of supplying said electrical network with voltage;
a control circuit for opening or closing the switches of the control bridge;
a device for measuring the voltage between the first and the second power supply terminal;
wherein for at least one predetermined phase winding that is also connected to a predetermined switching arm, the control system further comprises a device for measuring the current passing through the predetermined phase winding and, when the voltage measured by the voltage measurement device exceeds a first value:
the control circuit closes the low-side switch of the predetermined switching arm;
the current measurement device measures the current passing through the predetermined phase;
if the intensity of the measured current is positive, the control circuit closes the high-side switch of the predetermined switching arm
otherwise, the control circuit opens the high-side switch of the predetermined switching arm.

5 more elements

Dependencies are inferred from the claim text.

Method for controlling an electric rotary machine operating as a generator and corresponding control system for reducing the voltage in the network in the event of a cutoff

Life of this patent

Method for controlling an electric rotary machine operating as a generator and corresponding control system for reducing the voltage in the network in the event of a cutoff

Life of this patent

Abstract

Claims9