Charged EVs | Hillcrest’s gentle switching know-how reduces ripple present in EV traction inverters
Hillcrest Power Applied sciences, an inverter and management system firm, has launched a white paper describing the benefits of its gentle switching know-how. Hillcrest’s gentle switching know-how makes use of excessive switching frequency and is designed for EV traction inverters.
Within the white paper, authors from Hillcrest and Systematec write: “Simulation and experimental outcomes have proven that greater switching frequencies certainly cut back DC-link capacitor ripple present.”
“Ripple present discount may lead to quantity, weight and price reductions, as fewer parallel capacitors are wanted to satisfy producer ripple limits,” the authors write. “Furthermore, the DC-link capacitor measurement is inversely proportional to switching frequency. As switching frequency will increase, the required capacitance decreases. Capacitor quantity is proportional to capacitance; subsequently, with elevated switching frequency, greater energy density and decrease value may be achieved.”
“Capacitance for a typical EV traction inverter as we speak is between 600 micro farads and 1 millifarad, whereas the business prototype design of the Hillcrest traction inverter contemplates one-fifth to one-tenth of the capacitance,” says Hillcrest CTO Ari Berger. “Such a major discount in capacitor and inverter measurement and enhance in energy density, coupled with improved energy high quality and system reliability, has the potential to disrupt energy inverter designs throughout the automotive house.”
“The corporate continues validating its know-how,” says Hillcrest. “That is the primary in a sequence of anticipated studies demonstrating the worth of Hillcrest’s high-efficiency inverter know-how from numerous technical and sub-system features.”