DEVICE FOR MEASURING A CHOPPED CURRENT

摘要

A device for measuring a chopped current capable of flowing in a circuit having an H-bridge structure including a first branch and a second branch is disclosed. The device includes two transformers respectively connected to a branch and each comprising a primary circuit configured for the flow of a chopped current and a secondary circuit, two demagnetizing circuits, and two measuring circuits respectively connected to the terminals of the secondary circuit of an associated transformer, and respectively including at least one unit which comprises two switch connected in reverse, the two switches being respectively implemented by a transistor and being capable of being controlled. The measuring circuits include a common measuring resistor connected via a terminal to the ground, and via another terminal to the source of the first transistor of the first measuring circuit and to the source of the first transistor of the second measuring circuit.

主权项

1. A device for measuring a chopped current capable of flowing in a circuit having an H-bridge structure including a first branch and a second branch, the device comprising:
two transformers respectively connected to a branch of the H-bridge, the transformers respectively comprising a primary circuit configured for the flow of a chopped current, and a secondary circuit; two circuits for demagnetizing the two transformers; and two measuring circuits respectively connected to the terminals of the secondary circuit of an associated transformer, the measuring circuits respectively including at least one unit which comprises a first switch and a second switch connected in reverse, the two switches being respectively implemented by a transistor and being capable of being controlled so as to:
allow the flow of the current induced by the chopped current, in the measuring circuit when the primary circuit of an associated transformer is closed, andprevent the flow of the demagnetizing current in the measuring circuit when the primary circuit of an associated transformer is open; the measuring circuits including a common measuring resistor connected via a first terminal to the ground, and via a second terminal to the source of the first transistor of the first measuring circuit and to the source of the first transistor of the second measuring circuit.