APPARATUSES, SYSTEMS, AND METHODS OF VARIABLE FREQUENCY DRIVE OPERATION AND CONTROL

摘要

An exemplary system includes a compressor, a condenser, an expander, and an evaporator fluidly coupled to form a vapor-compression circuit, and an electric motor configured to drive the compressor. An inverter having a plurality of switching elements is configured to provide an output voltage to the electric motor through operation of the switching elements. A waste heat recovery circuit is configured to transfer waste heat from the inverter to a load. A controller is configured provide switching commands to the switching elements of the inverter. The controller is further configured to sense a condition of the system, determine a heat production requirement based at least in part upon the system condition, and to vary the number of switching commands per unit time based at least in part upon the heat production requirement.

主权项

1. A system comprising:
a compressor, an expander, a first heat exchanger, and a second heat exchanger, fluidly coupled to form a vapor-compression circuit; an electric motor configured to drive the compressor; an inverter comprising a plurality of switching elements, the inverter configured to provide an output voltage to the electric motor through operation of the switching elements; a waste heat recovery circuit configured to transfer waste heat from the inverter to a selected component of the system; and a controller including a system conditions module structured to sense a condition of the system, a heat production module structured to determine a heat production requirement based at least in part upon the system condition, and an inverter operation module structured to provide switching commands to the switching elements of the inverter, wherein the controller is configured to vary the number of switching commands per unit time based at least in part upon the heat production requirement.