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Regenerative braking system

  • US 10,374,527 B2
  • Filed: 12/29/2014
  • Issued: 08/06/2019
  • Est. Priority Date: 01/09/2014
  • Status: Active Grant
First Claim
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1. A circuit to deliver electrical energy between a load and an AC mains, the circuit comprising:

  • a switchable device coupling the load to the AC mains; and

    a controller including a synthesizer, a voltage control loop, and a current control loop,wherein the circuit is configured to transfer current from the AC mains to the load in a first operating mode and to transfer current from the load to the AC mains in a second operating mode, the load in the second operating mode producing a load voltage, andwherein the synthesizer synthesizes a rectified sine signal synchronized with the AC mains,wherein the voltage control loop generates a voltage signal as the difference between the load voltage and a reference voltage, andwherein the current control loop drives the switchable device in proportion to the product of the voltage signal and the rectified sine signal.

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