	US 11,807,133 B2
	Bus breaker control circuit for railway vehicle
Li Yang, Nanjing (CN); Caixia Shi, Nanjing (CN); Wei Xie, Nanjing (CN); Lian Ge, Nanjing (CN); Hemin Ding, Nanjing (CN); and Jianglong Chang, Nanjing (CN)
Assigned to CRRC Nanjing Puzhen Co., Ltd., Nanjing (CN)
Appl. No. 17/436,659
Filed by CRRC Nanjing Puzhen Co., Ltd., Nanjing (CN)
PCT Filed Nov. 11, 2020, PCT No. PCT/CN2020/128071 § 371(c)(1), (2) Date Sep. 7, 2021, PCT Pub. No. WO2022/088260, PCT Pub. Date May 5, 2022.
Claims priority of application No. 202011156778.3 (CN), filed on Oct. 26, 2020.
Prior Publication US 2022/0324352 A1, Oct. 13, 2022
Int. Cl. B60M 3/00 (2006.01); H02H 7/22 (2006.01)

CPC B60M 3/00 (2013.01) [H02H 7/22 (2013.01)]

17 Claims

1. A bus breaker control circuit for a railway vehicle, comprising

a close relay (BHB_CLOSE) for receiving a bus breaker closing instruction,

an open relay (BHB_OPEN) for receiving a bus breaker opening instruction,

a power supply circuit for a bus breaker (BHB),

a power supply circuit for a hold relay (BHB_HOLD), and

a delay module (RS);

wherein a main contact (BHB-1) of the bus breaker (BHB) is connected to a circuit of a high-voltage bus and used for controlling a connection/disconnection of the high-voltage bus;

the power supply circuit for the hold relay (BHB_HOLD) comprises

a normally-closed contact (BHB_OPEN-1) of the open relay (BHB_OPEN),

a first auxiliary normally-open contact (BHB-2) of the bus breaker (BHB), and

the hold relay (BHB_HOLD);

wherein the normally-closed contact (BHB_OPEN-1) of the open relay (BHB_OPEN), the first auxiliary normally-open contact (BHB-2) of the bus breaker (BHB), and the hold relay (BHB_HOLD) are sequentially connected in series to a train power supply;

the power supply circuit for the bus breaker (BHB) comprises

a first normally-open contact (BHB_HOLD-1) of the hold relay (BHB_HOLD) and

the bus breaker (BHB);

wherein the first normally-open contact (BHB_HOLD-1) of the hold relay (BHB_HOLD) and the bus breaker (BHB) are sequentially connected in series to the train power supply; and

the delay module (RS) is connected in parallel with the hold relay (BHB_HOLD),

normally-closed contacts (RS-1, RS-2) of the delay module (RS) are connected in series to a power supply circuit for the close relay (BHB_CLOSE), and

a high-potential terminal of the close relay (BHB_CLOSE) is connected to a high-potential terminal of the delay module (RS) through a first normally-open contact (BHB_CLOSE-1) of the close relay (BHB_CLOSE).