Method and circuit arrangement for the control of a motor

Details Method and circuit arrangement for the control of a motor Method and circuit arrangement for the control of a motor

1998-03-13

2000-01-11

Martin, David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318808, H02P 534

Patent

active

060140054

ABSTRACT:
A circuit arrangement is provided for controlling an electric motor (2), in particular a three-phase, three-strand motor, which is coupled to an intermediate circuit voltage (4) via a DC/AC converter (3) having three DC/AC converter branches (7,8,9). A measuring signal (i.sub.b1,i.sub.b2,i.sub.b3) which is proportional to the branch current is derived from each of the DC/AC converter branches (7,8,9), and a control signal (I.sub.pn), which is substantially proportional to the total value of the strand currents (i.sub.1,i.sub.2,i.sub.3) of the motor, is derived from these measuring signals (i.sub.b1,i.sub.b2,i.sub.b3).

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