A transport refrigeration system (200) is provided comprising: a vehicle (102) integrally connected to a transport container (106); an engine (320) configured to power the vehicle; a refrigeration unit (22) configured to provide conditioned air to the transport container; a battery (350) configured to provide electrical power to the refrigeration unit; an electric generation device (340) operably connected to the engine (320) and configured to engage the engine and generate electrical power from the engine to charge the battery when the electric generation device is activated; a sensor system (360) configured to detect at least one of a deceleration of the vehicle (364), a downward pitch of the vehicle (366), and a high-efficiency rotational speed of the engine (362); and a communication interface module (310) configured to activate the electric generation device when the sensor system detects at least one of the deceleration of the vehicle, the downward pitch of the vehicle, and the high-efficiency rotational speed of the engine.

A vehicle thermal management system includes a vehicle heat pump system, a battery system coolant loop, a drive train coolant loop, and control electronics. The vehicle heat pump system includes a compressor, a cabin condenser, a cabin evaporator, a cabin blower, and a chiller. The battery system coolant loop is in thermal communication with a battery system and with the chiller and selectively in thermal communication with the drive train coolant loop. The control electronics control the components of the vehicle thermal management system to heat the cabin, cool the cabin, heat the battery system, cool the battery system, and cool the drive train. The control electronics may control the compressor to operate in an efficient mode or a lossy mode in which the compressor generates heat. The control electronics may also control the components of the vehicle thermal management system to precondition the battery.

Disclosed is a system for managing power in a transport refrigeration unit (TRU) installed on a trailer, having: a TRU controller configured to execute a range extender mode of operation to manage operations of the TRU and TRU components, wherein the TRU controller: selects a power management strategy from a plurality of demand-side power management strategies; determines, from the selected power management strategy, operational parameters for a TRU; and executes the generated operational parameters.

A method for adaptive power engine control of a transport refrigeration unit (TRU) is provided. The method includes determining a current compressor power of a compressor of the TRU. The method also includes determining an adaptive compressor power error of the compressor. Also, the method includes calculating and setting a target compressor power of the compressor based on the current compressor power and the adaptive compressor power error. Further, the method includes determining a suction pressure control point of the compressor based on the target compressor power and a compressor curve map. Moreover, the method includes operating the compressor with the suction pressure control point of the compressor.

A vehicle thermal management system includes a vehicle heat pump system, a battery system coolant loop, a drive train coolant loop, and control electronics. The vehicle heat pump system includes a compressor, a cabin condenser, a cabin evaporator, a cabin blower, and a chiller. The battery system coolant loop is in thermal communication with a battery system and with the chiller and selectively in thermal communication with the drive train coolant loop. The control electronics control the components of the vehicle thermal management system to heat the cabin, cool the cabin, heat the battery system, cool the battery system, and cool the drive train. The control electronics may control the compressor to operate in an efficient mode or a lossy mode in which the compressor generates heat. The control electronics may also control the components of the vehicle thermal management system to precondition the battery.

A system includes a motor-driven component, a motor configured to operate the motor-driven component, and a motor drive circuit configured to power the motor. The motor drive circuit includes at least one complementary stage, where each stage includes a first transistor and a second transistor. During operation of the motor drive circuit, the first transistor is switched on when the second transistor is switched off. The system includes a controller communicatively coupled to the motor drive circuit. A load condition associated with the component is monitored. Based on the load condition, the controller determines whether the component is operating at a light load condition. If the component is operating at the light load condition, a switching frequency of each of stages is changed from a first switching frequency to a second switching frequency, which is less than the first switching frequency.

A method for controlling a climate control system is disclosed. In one example, the climate control system includes adjusting an air mixing valve state and adjusting a displacement of a compressor in response to an energy conversion device load. The method may provide improved climate control in a vehicle cabin during high energy conversion device load conditions.

Provided is a control device that performs protection control of a compressor without malfunction. The control device activates protection control on a compressor included in a refrigerant circuit based on a pressure value detected by a pressure sensor that is installed at a low-pressure side of the refrigerant circuit and a change over time of the pressure value.

A system includes a motor-driven component, a motor configured to operate the motor-driven component, and a motor drive circuit configured to power the motor. The motor drive circuit includes at least one complementary stage, where each stage includes a first transistor and a second transistor. During operation of the motor drive circuit, the first transistor is switched on when the second transistor is switched off. The system includes a controller communicatively coupled to the motor drive circuit. A load condition associated with the component is monitored. Based on the load condition, the controller determines whether the component is operating at a light load condition. If the component is operating at the light load condition, a switching frequency of each of stages is changed from a first switching frequency to a second switching frequency, which is less than the first switching frequency.

A method for directing thermal energy to an evaporator of a transport climate control circuit of a transport climate control system is provided. The method includes a controller determining whether the climate control circuit is operating in a start-stop cooling mode. Also, the method includes the controller determining a thermal energy charge of the thermal storage reservoir when the climate control circuit is operating in the start-stop cooling mode. The method also includes determining whether the thermal energy charge is greater than a charge threshold. Further, the method includes determining whether the climate control circuit is operating in a stop portion of the start-stop cooling mode when the thermal energy charge is greater than the charge threshold. The method further includes transferring thermal energy from the thermal storage reservoir to an evaporator when the climate control circuit is operating in the stop portion of the start-stop cooling mode.