A motor control system, comprising: a plurality of motor control devices (2a-c), wherein each motor control device (2a, 2b, 2c) comprises: a DC voltage unit (24a, 24b, 24c) configured to input a DC voltage; a regenerative circuit (26a, 26b, 26c) included in the DC voltage unit, wherein the regenerative circuit comprises a regenerative resistor (260a, 260b, 260c) and an analog switch (261a, 261b, 261c); an inverter (23a, 23b, 23c) configured to convert the DC voltage in the DC voltage unit into an AC voltage that is output to a motor (3a, 3b, 3c); a voltage detector (27a, 27b, 27c) configured to detect the DC voltage in the DC voltage unit; and a regenerative controller (28a, 28b, 28c) configured to control whether or not to actuate the analog switch of the regenerative circuit based on the DC voltage detected by the voltage detector, wherein the regenerative controller is further configured to wait until a predetermined waiting time period has elapsed, and then actuate the regenerative circuit, characterized in that the regenerative controller of each motor control device is further configured to actuate the analog switch of the regenerative circuit independently of operation of another regenerative controller of another motor control device of the plurality of motor control devices after it is detected that the DC voltage exceeds a predetermined threshold voltage; wherein each motor control device further comprises: a connector (22a, 22b, 22c) configured to connect the DC voltage unit to another DC voltage unit of another motor control device of the plurality of motor control devices; and a waiting time period setting unit (280a, 280b, 280c) configured to determine the predetermined waiting time period based on at least one of the regenerative resistor of the regenerative circuit, a capacity of the motor, and a load of the motor; and wherein the connectors (22a-c) of the plurality of the motor control devices are connected to each other. a plurality of motor control devices (2a-c), wherein each motor control device (2a, 2b, 2c) comprises: a DC voltage unit (24a, 24b, 24c) configured to input a DC voltage; a regenerative circuit (26a, 26b, 26c) included in the DC voltage unit, wherein the regenerative circuit comprises a regenerative resistor (260a, 260b, 260c) and an analog switch (261a, 261b, 261c); an inverter (23a, 23b, 23c) configured to convert the DC voltage in the DC voltage unit into an AC voltage that is output to a motor (3a, 3b, 3c); a voltage detector (27a, 27b, 27c) configured to detect the DC voltage in the DC voltage unit; and a regenerative controller (28a, 28b, 28c) configured to control whether or not to actuate the analog switch of the regenerative circuit based on the DC voltage detected by the voltage detector, wherein the regenerative controller is further configured to wait until a predetermined waiting time period has elapsed, and then actuate the regenerative circuit, a DC voltage unit (24a, 24b, 24c) configured to input a DC voltage; a regenerative circuit (26a, 26b, 26c) included in the DC voltage unit, wherein the regenerative circuit comprises a regenerative resistor (260a, 260b, 260c) and an analog switch (261a, 261b, 261c); an inverter (23a, 23b, 23c) configured to convert the DC voltage in the DC voltage unit into an AC voltage that is output to a motor (3a, 3b, 3c); a voltage detector (27a, 27b, 27c) configured to detect the DC voltage in the DC voltage unit; and a regenerative controller (28a, 28b, 28c) configured to control whether or not to actuate the analog switch of the regenerative circuit based on the DC voltage detected by the voltage detector, wherein the regenerative controller is further configured to wait until a predetermined waiting time period has elapsed, and then actuate the regenerative circuit, characterized in that the regenerative controller of each motor control device is further configured to actuate the analog switch of the regenerative circuit independently of operation of another regenerative controller of another motor control device of the plurality of motor control devices after it is detected that the DC voltage exceeds a predetermined threshold voltage; wherein each motor control device further comprises: a connector (22a, 22b, 22c) configured to connect the DC voltage unit to another DC voltage unit of another motor control device of the plurality of motor control devices; and a waiting time period setting unit (280a, 280b, 280c) configured to determine the predetermined waiting time period based on at least one of the regenerative resistor of the regenerative circuit, a capacity of the motor, and a load of the motor; a connector (22a, 22b, 22c) configured to connect the DC voltage unit to another DC voltage unit of another motor control device of the plurality of motor control devices; and a waiting time period setting unit (280a, 280b, 280c) configured to determine the predetermined waiting time period based on at least one of the regenerative resistor of the regenerative circuit, a capacity of the motor, and a load of the motor; and wherein the connectors (22a-c) of the plurality of the motor control devices are connected to each other.