Patent ID: 8692398

Claim:
A mobile environment-controlled unit comprising: a chassis; a compartment supported by the chassis; an environmental-control system in environmental communication with the compartment, the environmental-control system being configured to control an environmental parameter of the compartment, the environmental-control system including a multiphase alternator powered by an internal combustion engine and to supply electrical power for the environmental-control system, the alternator having a first phase winding to generate a first high-voltage alternating phase current and a second phase winding to generate a second high-voltage alternating phase current; a magnetic sensor including a core, a magnetic sensing device interconnected to the core and providing an output based on a sensed electromagnetic parameter, wherein a first conductor leading from the first phase winding is wound around the core in a first direction for a first number of turns, and wherein a second conductor leading from the second phase winding is wound around the core in the first direction for a second number of turns, the second number of turns being different from the first number of turns; and a controller coupled to the magnetic sensing device and configured to control the environmental-control system based on the output of the magnetic sensing device.