A magnetic rotor system comprising: a magnetic rotor comprising a rotor body rotatable about an axis and at least one magnet supported on the rotor body, the rotor body defining a chamber having an inlet and an outlet, wherein the rotor body defines a coolant flow path within the chamber from the inlet to the outlet, and wherein the rotor body is configured to receive a coolant within the chamber; the system further comprising: a coolant supply in fluid communication with the magnetic rotor such that a coolant is providable into the chamber of the rotor body; a sensor configured to detect at least one characteristic of the magnetic rotor system; and a controller communicatively coupled to the sensor, wherein the controller is configured to control the magnetic rotor system based on the at least one detected characteristic; characterized in that the at least one characteristic comprises at least one of a temperature gradient of the magnetic rotor, a temperature gradient of the coolant within the chamber, a temperature of the coolant exiting the magnetic rotor, a temperature of the coolant entering the magnetic rotor, a pressure of the coolant exiting the magnetic rotor, a pressure of the coolant entering the magnetic rotor, or a flow rate of the coolant, and that the controller is configured to control at least one of the pressure of the coolant exiting the magnetic rotor, the pressure of the coolant entering the magnetic rotor, the temperature of the coolant entering the magnetic rotor, the temperature of the coolant exiting the magnetic rotor, or the flow rate of the coolant. a magnetic rotor comprising a rotor body rotatable about an axis and at least one magnet supported on the rotor body, the rotor body defining a chamber having an inlet and an outlet, wherein the rotor body defines a coolant flow path within the chamber from the inlet to the outlet, and wherein the rotor body is configured to receive a coolant within the chamber; the system further comprising: a coolant supply in fluid communication with the magnetic rotor such that a coolant is providable into the chamber of the rotor body; a sensor configured to detect at least one characteristic of the magnetic rotor system; and a controller communicatively coupled to the sensor, wherein the controller is configured to control the magnetic rotor system based on the at least one detected characteristic; characterized in that the at least one characteristic comprises at least one of a temperature gradient of the magnetic rotor, a temperature gradient of the coolant within the chamber, a temperature of the coolant exiting the magnetic rotor, a temperature of the coolant entering the magnetic rotor, a pressure of the coolant exiting the magnetic rotor, a pressure of the coolant entering the magnetic rotor, or a flow rate of the coolant, and that the controller is configured to control at least one of the pressure of the coolant exiting the magnetic rotor, the pressure of the coolant entering the magnetic rotor, the temperature of the coolant entering the magnetic rotor, the temperature of the coolant exiting the magnetic rotor, or the flow rate of the coolant. a coolant supply in fluid communication with the magnetic rotor such that a coolant is providable into the chamber of the rotor body; a sensor configured to detect at least one characteristic of the magnetic rotor system; and a controller communicatively coupled to the sensor, wherein the controller is configured to control the magnetic rotor system based on the at least one detected characteristic; characterized in that the at least one characteristic comprises at least one of a temperature gradient of the magnetic rotor, a temperature gradient of the coolant within the chamber, a temperature of the coolant exiting the magnetic rotor, a temperature of the coolant entering the magnetic rotor, a pressure of the coolant exiting the magnetic rotor, a pressure of the coolant entering the magnetic rotor, or a flow rate of the coolant, and that the controller is configured to control at least one of the pressure of the coolant exiting the magnetic rotor, the pressure of the coolant entering the magnetic rotor, the temperature of the coolant entering the magnetic rotor, the temperature of the coolant exiting the magnetic rotor, or the flow rate of the coolant.