US 12,441,393 B2
Vehicle steering device and driving method thereof
Su-Min Lee, Siheung (KR); and Kyuyeong Je, Yongin (KR)
Assigned to HL Mando Corporation, Pyeongtaek (KR)
Filed by HL MANDO CORPORATION, Pyeongtaek (KR)
Filed on Mar. 22, 2023, as Appl. No. 18/187,930.
Claims priority of application No. 10-2022-0036681 (KR), filed on Mar. 24, 2022.
Prior Publication US 2023/0303156 A1, Sep. 28, 2023
Int. Cl. B62D 5/04 (2006.01)
CPC B62D 5/046 (2013.01) [B62D 5/0484 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A vehicle steering device comprising:
an inverter;
a motor having a plurality of phases and connected to the inverter through terminals, each terminal corresponding to one of the plurality of phases; and
a short-circuit controller configured to control a short-circuit state of the terminals of the motor based on whether a vehicle operated by the vehicle steering device is turned on,
wherein the short-circuit controller comprises:
a plurality of short-circuit switches each connected between a corresponding terminal of the terminals of the motor and a ground, and each including a first gate electrode to which an external power is input; and
a plurality of control switches each connected between the ground and a corresponding first gate electrode of the short-circuit switches, respectively, and each including a second gate electrode configured to receive a short-circuit control signal,
wherein the short-circuit control signal having an off level is supplied to the control switches in a state where the vehicle is turned off, such that the control switches are turned off, the short-circuit switches are turned on and the terminals of the motor are short-circuited, and
the short-circuit control signal having an on level is supplied to the control switches in a state where the vehicle is started, such that the control switches are turned on, the short-circuit switches are turned off and a short-circuit of the terminals of the motor is released.