Control facility for a DC link converter and DC link converter
AssigneeSiemens Aktiengesellschaft
InventorsBernd Dietz, Gerald Reichl, Elmar Schäfers
Life of this patent
Estimating the term…
Abstract
A control facility for a DC link converter includes a power regulator, which determines, based on an actual power determined at least partially at the feed converter, a power-based desired moment component for a kinetic energy store. The invention also relates to a DC link converter controlled by the control facility and to a forming machine, such as a press, with a DC link converter controlled by the control facility.
Claims18
A control facility for controlling a DC link converter, the DC link converter comprising a DC link with a DC link capacitor and receiving electrical energy from a feed converter connected to a supply network and supplying electrical energy to a useful bad via a bad converter, the DC link converter further comprising a buffer converter coupled to a DC link of the DC link converter and connected to a kinetic energy store for bidirectional energy exchange, said control facility comprising:
- a first voltage regulator determining, based on a desired voltage and an actual voltage that drops across the DC link capacitor, a desired current for the feed converter and controlling the feed converter based on the determined desired current,
- a speed regulator determining, based on a desired speed and an actual speed of the kinetic energy store, a first desired moment component for the kinetic energy store,
- a power regulator determining, based on an actual power that is at least partially determined at the feed converter, a power-based desired moment component for the kinetic energy store, and
- a node adding the first desired moment component and the power-based desired moment component to form a desired moment and controlling the buffer converter using the formed desired moment.
A DC link converter, comprising:
- a DC link with a DC link capacitor,
- a feed converter supplying electrical energy from a supply network to the DC link,
- a load converter supplying electrical energy from the DC link to a useful load,
- a buffer converter which couples a kinetic energy store to the DC link for bidirectional energy exchange, and
- a control facility, which controls the feed converter, the load converter and the buffer converter, the control facility comprising a first voltage regulator determining, based on a desired voltage and an actual voltage that drops across the DC link capacitor, a desired current for the feed converter and controlling the feed converter based on the determined desired current, a speed regulator determining, based on a desired speed and an actual speed of the kinetic energy store, a first desired moment component for the kinetic energy store, a power regulator determining, based on an actual power that is at least partially determined at the feed converter, a power-based desired moment component for the kinetic energy store, and a node adding the first desired moment component and the power-based desired moment component to form a desired moment and controlling the buffer converter using the formed desired moment.
A forming machine, comprising:
- a DC link converter having a DC link with a DC link capacitor,
- a feed converter supplying electrical energy from a supply network to the DC link,
- a load converter supplying electrical energy from the DC link to a useful load,
- a buffer converter which couples a kinetic energy store to the DC link for bidirectional energy exchange, and
- a control facility, which controls the feed converter, the load converter and the buffer converter, the control facility comprising a first voltage regulator determining, based on a desired voltage and an actual voltage that drops across the DC link capacitor, a desired current for the feed converter and controlling the feed converter based on the determined desired current, a speed regulator determining, based on a desired speed and an actual speed of the kinetic energy store, a first desired moment component for the kinetic energy store, a power regulator determining, based on an actual power that is at least partially determined at the feed converter, a power-based desired moment component for the kinetic energy store, and a node adding the first desired moment component and the power-based desired moment component to form a desired moment and controlling the buffer converter using the formed desired moment.
Dependencies are inferred from the claim text.