VARIABLE SPEED DRIVE PROVIDED WITH A SUPERCAPACITOR MODULE
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Abstract
A variable-speed drive including: 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 supplied with power by the DC power supply bus and controlled to provide a variable voltage to an electrical load; a first switching branch connected between the positive line and the negative line of the bus and including at least one first electronic switch; and a first module including a braking resistor, or a second module including a mechanism 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.
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Citations
16 Claims
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1-8. -8. (canceled)
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9. A variable-speed drive comprising:
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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. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification