Mando Corporation

Hl Mando Corporation

Lucas Ritter

Tomy Sebastian

Shakil Hossain

Awab Ali

Kade Hudson

A motor control system shorts motor windings of a motor by using enhancement metal-oxide-semiconductor field-effect transistors (MOSFETs) so that the motor generates braking torque when all or some electric control units of the motor are disabled or failed. The motor control system comprises: a motor comprising a plurality of motor phase terminals; a plurality of electric control units electrically connected to the motor and configured to control the motor, wherein the electric control units configured to output control signals, respectively; a plurality of power sources, each of the power sources electrically connected to a respective one of the electric control units; and a shorting circuit connected between the power sources and the motor, the shorting circuit configured to selectively short the motor phase terminals in response to one or more of the control signals of the electric control units.

Motor control system and method for selectively shorting motor windings

A motor control system shorts motor windings of a motor by using junction gate field-effect transistors (JFETs) controlled bipolar junction transistors (BJTs), solid state relays (SSRs) controlled BJTs, and depletion mode metal-oxide-semiconductor field-effect transistors (MOSFETs) so that the motor generates braking torque when all or some electric control units of the motor are disabled or failed. The motor control system comprises: a motor comprising a plurality of motor phase terminals; a plurality of electric control units electrically connected with the motor and configured to control the motor, wherein the electric control units are configured to output control signals, respectively; and a shorting circuit connected to between the motor and the electric control units, the shorting circuit configured to short the motor phase terminals in response to receiving none of the control signals from the electric control units. The shorting circuit is configured not to short the motor phase terminals when receiving at least one of the control signals from at least one of the electric control units.

A motor control system comprises: a motor comprising motor windings; and electric control units connected with the motor, each of the electric control units comprising an inverter. One of the electric control units comprises: a direct current (DC) bus; first switches, each of the first switches connected with a respective one of the motor windings; second switches, each of the second switches connected with the DC bus and a respective one of the motor windings; a first switch driver generating drive signals to drive the first and second switches; pull up resistors, each of the pull up resistors connected between the DC bus and a respective one of the second switches. The voltage pulled up by the pull up resistors can force the second switches to be turned on to short the motor windings in a state that the first switch driver does not generate the drive signals.

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Saginaw, MI, United States of America

Lucas Ritter