US Patent No. 10,924,030

MODULAR POWER SUPPLY SYSTEM


Patent No. 10,924,030
Issue Date February 16, 2021
Title Modular Power Supply System
Inventorship Jianping Ying, Shanghai (CN)
Ming Wang, Shanghai (CN)
Xiaobo Huang, Shanghai (CN)
Jun Liu, Shanghai (CN)
Zhiming Hu, Shanghai (CN)
Assignee Delta Electronics (Shanghai) CO., LTD, Shanghai (CN)

Claim of US Patent No. 10,924,030

1. A modular power supply system, configured to comprise:a main controller, configured to output a main control signal;
N local controllers, wherein each of the local controllers is configured to receive the main control signal to output at least one local control signal; and
N power units, in one-to-one correspondence with the N local controllers, wherein each of the power units comprises a first end and a second end, the second end of each of the power units is connected to the first end of an adjacent one of the power units, and each of the power units is configured to comprise M power converters, wherein each of the power converters comprises a third end and a fourth end, the fourth end of each of the power converters is connected to the third end of an adjacent one of the power converters, and the third end of the first one of the power converters is connected to the first end of the power unit, the fourth end of the M-th one of the power converters is connected to the second end of the power unit, and each of the power converters is configured to operate according to the local control signal output by a corresponding local controller, wherein both N and M are natural numbers greater than one,
wherein at least one of the M power converters is a master power converter, at least one of the M power converters is a slave power converter, and the local control signals for controlling power semiconductor switches at the same position of the slave power converters to be turned on and off are the same,
each of the power units further comprises:
a master sampling circuit, configured to sample a positive DC bus voltage and a negative DC bus voltage of the master power converter respectively, or a sum of positive DC bus voltages and a sum of negative bus voltages of the master power converters; and
a slave sampling circuit, configured to sample a sum of positive DC bus voltages and a sum of negative bus voltages of the slave power converters respectively, and
the local controller corresponding to the power unit is configured to comprise: a sampling conditioning circuit, configured to convert the sampled positive DC bus voltage and negative DC bus voltage of the master power converter, or the sum of positive DC bus voltages and the sum of negative bus voltages of the master power converters, and the sum of positive DC bus voltages and the sum of negative bus voltages of the slave power converters into digital signals.