DC chopper and method for operating a DC chopper
First Claim
1. A DC chopper for converting an input voltage into an output voltage, comprising:
- two input terminals for receiving the input voltage;
an output capacitor providing the output voltage and the DC chopper supplying a current for charging said output capacitor;
an input capacitor;
an input filter device coupled between said input terminals and said input capacitor, said input filter device filtering the input voltage resulting in a filtered input voltage being supplied to said input capacitor;
a setting device setting a required current value signal being dependent on the filtered input voltage, such that an oscillation of said input filter device and an oscillation of the current are phase-opposed;
a controllable power switch coupled to said input capacitor; and
a controller connected to and switching said controllable power switch for controlling a current discharge from said input capacitor in dependence on the required current value signal.
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Accused Products
Abstract
A DC chopper features a setting device, which sets a required current value signal being dependent on a filtered input voltage such that an oscillation of the input filter device and an oscillation of the current are phase-opposed. The DC chopper may further have a control device, which, depending on the input voltage, supplies a control signal and adds the control signal to the actual current value signal supplied to form a controlled actual current value signal. The DC chopper may optionally have a disconnection device, which receives a switch-off signal on the input side and, depending on the switch-off signal received, supplies a ramp disconnection signal, and an adding node which adds the actual current value signal to the ramp disconnection signal to form an elevated actual current value signal.
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Citations
18 Claims
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1. A DC chopper for converting an input voltage into an output voltage, comprising:
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two input terminals for receiving the input voltage; an output capacitor providing the output voltage and the DC chopper supplying a current for charging said output capacitor; an input capacitor; an input filter device coupled between said input terminals and said input capacitor, said input filter device filtering the input voltage resulting in a filtered input voltage being supplied to said input capacitor; a setting device setting a required current value signal being dependent on the filtered input voltage, such that an oscillation of said input filter device and an oscillation of the current are phase-opposed; a controllable power switch coupled to said input capacitor; and a controller connected to and switching said controllable power switch for controlling a current discharge from said input capacitor in dependence on the required current value signal. - View Dependent Claims (2)
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3. A multiphase DC chopper for converting an input voltage into an output voltage, comprising:
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two input terminals for receiving the input voltage; an output capacitor providing the output voltage; an input capacitor; an input filter device coupled between said input terminals and said input capacitor, said input filter device filtering the input voltage resulting in a filtered input voltage being supplied to said input capacitor; a plurality of N DC choppers connected in parallel between said input capacitor and said output capacitor, an nth one of said DC choppers supplying an nth current for charging said output capacitor, with nε
[1, . . . , N], each of said DC choppers including;a setting device setting a required current value signal being dependent on the filtered input voltage, such that an oscillation of said input filter device and an oscillation of the nth current are phase-opposed; a controllable power switch coupled to said input capacitor; and a first controller connected to and switching said controllable power switch for controlling a current discharge from said input capacitor in dependence on the required current value signal. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. A method for operating a DC chopper for converting an input voltage present between two input terminals into an a output voltage of an output capacitor, which comprises the steps of:
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coupling an input filter device between the input terminals and an input capacitor, the input filter device filtering the input voltage resulting in a filtered input voltage being supplied to the input capacitor; providing a DC chopper connected in parallel between the input capacitor and the output capacitor, the DC chopper supplying a current for charging the output capacitor; setting a required current value signal being dependent on the filtered input voltage such that an oscillation of the input filter device and an oscillation of the current are phase-opposed; and controlling a controllable power switch for controlling a current discharge from the input capacitor in dependence on the required current value signal.
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11. A DC chopper for converting an input voltage of an input capacitor into an output voltage of an output capacitor, the DC chopper supplying a current for charging the output capacitor, the DC chopper comprising:
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an inductive actuator having an output side supplying the current; a first resistor, which, depending on the current supplied on said output side by said inductive actuator, supplies an actual current value signal; a second controller receiving the input voltage and depending on the input voltage supplying a control signal and adds the control signal to the actual current value signal supplied to form a controlled actual current value signal; a controllable power switch; and a first controller connected to and switching off said controllable power switch for controlling a current discharge from the input capacitor in each case if the controlled actual current value signal is greater than a required current value signal predetermined for the DC chopper. - View Dependent Claims (12, 13)
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14. A method of operating a DC chopper configuration for converting an input voltage of an input capacitor into an output voltage of an output capacitor, which comprises the steps of:
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providing a DC chopper connected in parallel between the input capacitor and the output capacitor, the DC chopper supplying a current for charging the output capacitor; providing an actual current value signal being dependent on the current supplied on an output side of an inductive actuator of the DC chopper; providing a control signal being dependent on the input voltage; adding the control signal to the actual current value signal for forming a controlled actual current value signal; and controlling a controllable power switch for controlling a current discharge from the input capacitor such that the power switch is switched off in each case if the controlled actual current value signal is greater than a required current value signal predetermined for the DC chopper.
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15. A DC chopper for converting an input voltage of an input capacitor into an output voltage of an output capacitor, and supplying a current for charging the output capacitor, the DC chopper comprising:
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an inductive actuator having an output side supplying the current for charging the output capacitor; a first resistor, which depending on the current supplied on said output side by said inductive actuator, supplies an actual current value signal; a disconnection device having an input side receiving a switch-off signal and, depending on the switch-off signal received, supplies a ramp disconnection signal; an add node for adding the actual current value signal to the ramp disconnection signal for forming an elevated actual current value signal; a controllable power switch; and a first controller connected to and switching off said controllable power switch for controlling a current discharge from the input capacitor in each case if the elevated actual current value signal is greater than a required current value signal predetermined for the DC chopper. - View Dependent Claims (16, 17)
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18. A method of operating a DC chopper configuration for converting an input voltage of an input capacitor into an output voltage of an output capacitor, which comprises the steps of:
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providing a DC chopper connected in parallel between the input capacitor and the output capacitor, the DC chopper supplying a current for charging the output capacitor; supplying an actual current value signal being dependent on the current supplied on an output side of an inductive actuator of the DC chopper; generating a ramp disconnection signal being dependent on a received switch-off signal; adding the actual current value signal to the ramp disconnection signal for forming an elevated actual current value signal; and controlling a controllable power switch for controlling a current discharge from the input capacitor such that the power switch will be switched off in each case if the elevated actual current value signal is greater than a required current value signal predetermined for the DC chopper.
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Specification