Patent ID: 9270192
Filing Date: 2016-02-23
CPC Classification: H02M,H02P

Claim Text:
1. A variable-speed drive comprising: a DC power supply bus including a positive line and a negative line; a bus capacitor connected between the positive line and the negative line of the DC power supply bus; an inverter module powered by the DC power supply bus and controlled to deliver a variable voltage to an electrical load; a first switching leg connected between the positive line and the negative line of the bus and comprising at least one first electronic switch; a first module comprising a braking resistor or a second module comprising means for storing and regenerating electrical energy generated during braking of the electrical load; wherein the first module and the second module are removable and interchangeable; wherein the first module and the second module take a form of a cassette that connects to the DC power supply bus and to the first switching leg.