US 12,142,912 B2
Motor controller and motor control method for an electronic vehicle
Nan-Hsiung Tseng, Hsinchu (TW); Bing-Ren Chen, New Taipei (TW); Shin-Hung Chang, Taoyuan (TW); and Chin-Hone Lin, Puli Township (TW)
Assigned to INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu (TW)
Filed by INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE, Hsinchu (TW)
Filed on Dec. 27, 2022, as Appl. No. 18/089,136.
Claims priority of application No. 111144820 (TW), filed on Nov. 23, 2022.
Prior Publication US 2024/0170954 A1, May 23, 2024
Int. Cl. H02H 9/02 (2006.01); B60L 7/10 (2006.01)
CPC H02H 9/02 (2013.01) [B60L 7/10 (2013.01); B60L 2240/421 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A motor controller for controlling a motor of an electronic vehicle, the motor controller being powered by a battery, the motor controller comprising:
a power distribution unit coupled to the battery; and
a control unit coupled to the power distribution unit, wherein the control unit has a power hold function,
wherein,
the power distribution unit comprises a main relay, a first protecting circuit and a second protecting circuit;
a first terminal of the main relay is coupled to a positive electrode terminal of the battery; a second terminal of the main relay is coupled to a positive terminal of a direct-current (DC) bus;
the first protecting circuit coupled in parallel with the main relay, the first protecting circuit is coupled to the battery, the first protecting circuit comprises a diode and a first current limit resistor, wherein, the diode is connected in series with the first current limit resistor;
the second protecting circuit comprises a discharge switch and a second current limit resistor, wherein the discharge switch is coupled in series with the second current limit resistor, the second protecting circuit is coupled in parallel between the positive terminal of the DC bus and a negative terminal of the DC bus and is interposed between the second terminal of the main relay and the positive terminal of the DC bus; and
when the main relay suddenly breaks contact, in a first phase, the diode and the first current limit resistor of the first protecting circuit feed back a surge current into the battery to suppress the surge current; and in a second phase, the control unit conducts the discharge switch, and the discharge switch and the second current limit resistor of the second protecting circuit release the surge current to a reference voltage range.