AC-to-AC converter and method for converting a first frequency AC-voltage to a second frequency AC-voltage
First Claim
1. An AC-to-AC-converter for converting a first frequency AC-voltage to a second frequency AC-voltage, the converter comprising:
- a first converter section including at least a first input terminal and a second input terminal and including a first DC-output node and a second DC-output node, the first converter section being adapted for converting the first frequency AC-voltage applied between the first input terminal and the second input terminal to a DC-voltage between the first DC-output node and the second DC-output node;
a second converter section including a first DC-input node connected to the first DC-output node and including a second DC-input node connected to the second DC-output node and including at least two second output terminals, the second converter section being adapted for converting the DC-voltage between the first DC-input node and the second DC-input node to the second frequency AC-voltage between the at least two second output terminals;
a DC-link overvoltage clamp coupled between the first DC-output node and the second DC-output node; and
a capacitor system coupled between the first DC-output node and the second DC-output node,wherein the first converter section, the second converter section, the DC-link overvoltage clamp, and the capacitor system are integrated into one assembly.
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Accused Products
Abstract
An AC-to-AC-converter for converting a first frequency AC-voltage to a second frequency AC-voltage is disclosed. The converter includes: a first converter section which includes a first input terminal, a second input terminal, a first DC-output node, and a second DC-output node; a second converter section which includes a first DC-input node connected to the first DC-output node, a second DC-input node connected to the second DC-output node, and at least two second output terminals; a DC-link overvoltage clamp which is coupled between the first DC-output node and the second DC-output node; and a capacitor system. The first converter section, the second converter section, the DC-link overvoltage clamp, and the capacitor system are integrated into one assembly.
27 Citations
16 Claims
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1. An AC-to-AC-converter for converting a first frequency AC-voltage to a second frequency AC-voltage, the converter comprising:
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a first converter section including at least a first input terminal and a second input terminal and including a first DC-output node and a second DC-output node, the first converter section being adapted for converting the first frequency AC-voltage applied between the first input terminal and the second input terminal to a DC-voltage between the first DC-output node and the second DC-output node; a second converter section including a first DC-input node connected to the first DC-output node and including a second DC-input node connected to the second DC-output node and including at least two second output terminals, the second converter section being adapted for converting the DC-voltage between the first DC-input node and the second DC-input node to the second frequency AC-voltage between the at least two second output terminals; a DC-link overvoltage clamp coupled between the first DC-output node and the second DC-output node; and a capacitor system coupled between the first DC-output node and the second DC-output node, wherein the first converter section, the second converter section, the DC-link overvoltage clamp, and the capacitor system are integrated into one assembly. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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3. The AC-to-AC-converter according to claim 3, wherein the heat dissipater is integrally formed.
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16. A method for converting a first frequency AC-voltage to a second frequency AC-voltage, the method comprising:
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converting the first frequency AC-voltage applied between a first input terminal of a first converter section and a second input terminal of the first converter section to a DC-voltage between a first DC-output node and a second DC-output node; converting the DC-voltage between a first DC-input node of a second converter section and a second DC-input node of the second converter section to a second frequency AC-voltage between at least two second output terminals of the second converter section; clamping the DC-voltage to be below a threshold voltage by using a DC-link overvoltage clamp coupled between the first DC-output node and the second DC-output node; and rectifying the DC-voltage by using a capacitor system coupled between the first DC-output node and the second DC-output node, wherein the first converter section, the second converter section, the DC-link overvoltage clamp, and the capacitor system are integrated into one assembly.
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Specification