Device and method for control of an electric power converter and converter comprising such a device

Device and method for control of an electric power converter and converter comprising such a device

  • CN 1,819,432 B
  • Filed: 12/23/2005
  • Issued: 01/02/2013
  • Est. Priority Date: 12/23/2004
  • Status: Active Grant
First Claim
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1. control appliance that is used for the control electric power converter comprises that described electric power converter comprises for the control device (6) of the connection of at least three semiconductor arms of control (2A, 2B, 2C):

  • Dc voltage pipeline (L1 and L2),Switching device (2), it has at least three the semiconductor arms (2A, 2B, 2C) between the output that is connected to described dc voltage pipeline (L1 and L2) and switching device (2), be used for converting described dc voltage to output AC voltage (VO), andControl device (6) is used for the connection of described at least three semiconductor arms (2A, 2B, 2C) of control switching device (2),Described control device comprises;

    Processing apparatus (7), for first and second modulation signals (MC1, MC1A, MC1B, MC1C, MC2) of the control signal that described at least three semiconductor arms are provided,Be used for determining the device (9) of general control component (OM),Described control device is characterised in that, described device (9) for determining general control component (OM) comprises detection means (22,22A, 22B), described detection means detects the electric current (I123) of the output of at least three semiconductor arms that flow into described switching device (2), and output detection signal (23,23A, 23B), to be used to from the first modulation signal (MC1, MC1A, MC1B, MC1C) select to be used for applying at least one modulation signal of ovennodulation in, described device for determining general control component (OM) is according to the first modulation signal (MC1, MC1A, MC1B, MC1C) and described detection signal (23,23A, 23B) determine described general control component (OM), described general control component (OM) is used for the second modulation signal (MC2A to the control signal of at least three semiconductor arms of switching device, MC2B, MC2C) apply ovennodulation, described detection signal represents the line that line that line that the highest electric current of absolute value flows through or the highest electric current of absolute value flow through and absolute value the second high electric current flow through.

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