A system includes a grid coupled to an electrical bus; an electrical power modulation device coupled to the electrical bus that can output modified electrical power received from the electrical bus; a blower motor coupled to the electrical power modulation device that can receive the modified electrical power output and can provide a stream of air to affect a temperature of the grid, and a controller. A speed of the blower motor may be based at least in part on an amount of the modified electrical power. The controller can receive an operating parameter, and is responsive to that parameter by causing the electrical power modulation device to vary the amount of the modified electrical power. A blower motor speed may be controlled based at least in part on the operating parameter. GRID CONTROLLER 112 GRID GBM 12 BLOWER118 120 AUX Y- - -ELECTRICAL AUXILIARY AUXILIARY ABM POWER CONVERTER ENGINE BLOWER 122 126 MODULATION 104 102 DEVICE(S) TM BLOWER TMBM 108 TRACTION 114 116 /202 DC BUS R1 R206 208 DC VOLTS 1 GRID
