Voltage-converting circuit for the power supply of an electrical consumer of high output, particularly a bobbin winding machine
First Claim
1. An electrical circuit for the conversion of a multiplicity of commercial power voltages into a supply voltage for use with a device with high electrical power requirements, such as a textile bobbin winding machine, said supply voltage being independent of the respective commercial power voltage, said electrical circuit comprising:
- a rectifier assembly for generating a primary intermediate circuit DC voltage in a range of approximately 300 V to approximately 1000 V by rectifying and filtering the commercial power voltage having a range of values between approximately 180 V and approximately 600 V;
a converter assembly having a plurality of triggerable power switches for converting said primary intermediate circuit DC voltage into an AC voltage having a rectangular waveform;
a high-power transformer having an intermediate circuit connected thereto for transforming said AC voltage having a rectangular waveform into said supply voltage; and
a control assembly for switching said power switches at zero voltage responsive to the primary intermediate circuit DC voltage, the current in the primary winding of said high-power transformer, and the voltage and the current in the secondary intermediate circuit, said control assembly switching said power switches using a variable pulse width of the AC voltage having a rectangular waveform required for achieving a predetermined supply voltage.
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Accused Products
Abstract
An electric circuit for the conversion of a multiplicity of commercial power voltages to a predetermined supply voltage which is independent of the respective commercial power voltage, for a device with high electrical power requirements of high output, in the range up to 40 kW, such as a bobbin winding machine. The circuit contains a rectifier stage for generating a primary intermediate circuit DC voltage, a converter stage with power switches for generating a rectangular AC voltage, a high-power transformer with a connected secondary control circuit and a control stage which triggers the power switches at zero voltage in a phase-shift mode with a variable frequency and pulse width of the rectangular AC voltage as a function of the input voltage of the rectifier stage, the transformer primary winding current and both the voltage and the current in the secondary intermediate circuit.
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Citations
5 Claims
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1. An electrical circuit for the conversion of a multiplicity of commercial power voltages into a supply voltage for use with a device with high electrical power requirements, such as a textile bobbin winding machine, said supply voltage being independent of the respective commercial power voltage, said electrical circuit comprising:
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a rectifier assembly for generating a primary intermediate circuit DC voltage in a range of approximately 300 V to approximately 1000 V by rectifying and filtering the commercial power voltage having a range of values between approximately 180 V and approximately 600 V; a converter assembly having a plurality of triggerable power switches for converting said primary intermediate circuit DC voltage into an AC voltage having a rectangular waveform; a high-power transformer having an intermediate circuit connected thereto for transforming said AC voltage having a rectangular waveform into said supply voltage; and a control assembly for switching said power switches at zero voltage responsive to the primary intermediate circuit DC voltage, the current in the primary winding of said high-power transformer, and the voltage and the current in the secondary intermediate circuit, said control assembly switching said power switches using a variable pulse width of the AC voltage having a rectangular waveform required for achieving a predetermined supply voltage. - View Dependent Claims (2, 3, 4, 5)
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Specification