White PaperElectronics & Computers

Testing Electric Vehicle Motor and Controller with a Bidirectional Power Supply


Each year ,vehicle electrification continues to increase, with all signs pointing to this trend accelerating in the future. Some of the factors contributing to this development are the increasing use of hybrid and fully electric vehicles to meet “green energy” goals, the desire for the greater reliability that electronic components generally provide, and the need to reduce automotive recalls.

Electric Motor and Drive-train (Electric Mobility) Testing is a critical part of bringing any electric drive-train into production. In this paper, the requirements for an electric drive-train test cell are discussed. The implementations of such test cells are described, and examples of test results are provided. The energy and power requirements for three-phase motor and controller, Unit Under Test (UUT) connected through a common dc bus are described. The data used represents various steady state load conditions during durability test cycles. This “Smart Green Technology” concept not only reduces the energy requirement from the grid but also eliminates the inefficiencies by putting energy back on the grid.

This application note provides an example of testing an E-Motor and Controller for electric vehicles. Traditional test setups require a dedicated DC source and Load in parallel to deal with bi-directional energy flow. This can require a complex test setup to coordinate energy flow and to avoid damaging expensive test equipment. A bidirectional DC source with a built-in regenerative electronic load greatly simplifies the test setup, avoids catastrophic damage, and decreases test times. This electronic load being regenerative also has the unique option of back-feeding converted energy into the grid, providing energy recover and reducing HVAC costs of operation by more than 90%. Read the full application note to learn more.

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