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Method and controller for model predictive control of multi-phase dc/dc converter

A technology of model predictive control and DC converter, applied in general control system, adaptive control, control/regulation system, etc., can solve the problem that the prediction time domain can no longer be realized, etc.

Active Publication Date: 2016-11-23
AVL LIST GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even with the very fast processors available today, this is no longer possible from a certain prediction horizon onwards

Method used

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  • Method and controller for model predictive control of multi-phase dc/dc converter
  • Method and controller for model predictive control of multi-phase dc/dc converter
  • Method and controller for model predictive control of multi-phase dc/dc converter

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Embodiment Construction

[0028] The starting point for the method according to the invention is the known model of the current simulator 1 as shown in FIG. 2 or the known model of the current tester 7 as shown in FIG. 2a. Assuming smoothing capacitor C 0 is large enough so that the dynamics of the rectifier 11 can be ignored and the DC voltage V can be considered 0 is constant. Leakage inductance of wires and coils, non-linearity and parasitic capacitance of semiconductor switches of the half-bridge are also neglected, which is allowed for normal operating conditions. The switches S1 and S2, S3 and S4, S5 and S6 of the individual bridge branches are always not switched on at the same time, i.e. S1 is closed and S2 is open or vice versa, etc., in order to avoid the smoothing capacitor C 0 short circuit on. Forward and reverse current flow, ie bidirectional DC / DC converter 12 , can be realized by switching switches S1 to S6 accordingly. Of course, the following explanations also apply to unidirectio...

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Abstract

For an easily implementable method for model predictive control of a DC / DC converter, and a corresponding controller, with which the optimization problem of the model predictive control can also be solved sufficiently quickly with large prediction horizons, the optimization problem is divided into two optimization problems by a model predictive output variable control and a model predictive choke current control being implemented in the control unit (10), wherein the strands of the multi-phase DC / DC converter (12) for the output variable control are combined into a single strand and a time-discrete state space model is produced therefrom and the output variable control predicts the input voltage (uv,k+1) of the next sampling step (k+1) for this single strand on the basis of a first cost function (Jv) of the optimization problem of the output variable control, said input voltage being given to the choke current control as a setpoint and the choke current control therefrom determining the necessary switch positions of the switches (S1, S2, S3, S4, S5, S6) of the strands of the multi-phase DC / DC converter (12) for the next sampling step (k+1) on the basis of a second cost function (Ji) of the optimization problem of the choke current control.

Description

technical field [0001] The invention relates to a method for model predictive control and a model predictive controller for a multiphase DC / DC converter with a half bridge for multiphase DC / DC Each branch of the DC converter has two switches, wherein the switches are controlled by the control unit to generate the desired output. Background technique [0002] Battery emulators are known for simulating the characteristics of electrical batteries. Such a battery simulator 1 is required, for example, in the development or testing of a powertrain of an electric vehicle or a hybrid vehicle or in the development of an electrical energy store for such a vehicle, as shown in FIG. 1 . The battery emulator 1 is usually related to the load current i 2 The ground generates a DC output voltage v 2 . For this, measure the load current i 2 and feed it to the battery model 4, which is determined by the load current i 2 Calculate the reference output voltage v 2R , the reference output...

Claims

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Application Information

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IPC IPC(8): G01R31/36G05B13/02H02M3/157H02M3/158
CPCG01R31/382G05B17/02G05F1/10G06F17/10H02M1/0845G05B13/04H02M3/1584G01R31/367H02M3/1586G05B13/048H02M3/158
Inventor M·巴特林纳O·柯尼希S·亚库贝克G·普罗克阿特
Owner AVL LIST GMBH
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