Power supply apparatus with selective rectifier harmonic input current suppression and methods of operation thereof
First Claim
1. A power supply apparatus, comprising:
- an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a DC voltage at a rectifier circuit output from an AC input voltage at the AC input port; and
a selective harmonic current inducting circuit, coupled to the rectifier circuit output, that induces a harmonic component in a current delivered to a load from the rectifier circuit output to suppress a harmonic current at the AC input port without requiring a current bypass between the AC input port and the rectifier circuit output.
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Accused Products
Abstract
A power supply apparatus includes an AC input port and a rectifier circuit, coupled to the AC input port, that produces a DC voltage at a rectifier circuit output from an AC input voltage at the AC input port. The apparatus further includes a selective harmonic current inducing circuit, coupled to the rectifier circuit output, that induces a harmonic component in a current delivered to a load from the rectifier circuit output. The selective harmonic current inducing circuit may control a phase and a magnitude of the induced harmonic current component in order to achieve selective suppression of a harmonic input current at the AC input port. The power supply apparatus may further include a filter circuit, coupled to the AC input port, that selectively suppresses a first harmonic current at the AC input port. The selective harmonic current inducing circuit may control the phase and magnitude of the induced harmonic current component such that a second harmonic current at the AC input port is suppressed. For example, for a three-phase passive rectifier circuit, the filter circuit may suppress a fifth harmonic input current, and the selective harmonic current inducing circuit may control the phase and magnitude of an induced sixth harmonic current component such that a seventh harmonic input current at the AC input port is suppressed. Related methods are also discussed.
48 Citations
61 Claims
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1. A power supply apparatus, comprising:
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an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a DC voltage at a rectifier circuit output from an AC input voltage at the AC input port; and
a selective harmonic current inducting circuit, coupled to the rectifier circuit output, that induces a harmonic component in a current delivered to a load from the rectifier circuit output to suppress a harmonic current at the AC input port without requiring a current bypass between the AC input port and the rectifier circuit output. - View Dependent Claims (2, 3)
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4. A power supply apparatus, comprising:
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an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a DC voltage at a rectifier circuit output from an AC input voltage at the AC input port;
a selective harmonic current inducting circuit, coupled to the rectifier circuit output, that induces a harmonic component in a current delivered to a load from the rectifier circuit output; and
a filter circuit, coupled to the AC input port, that selectively suppresses a first harmonic current at the AC input port, and wherein the selective harmonic current inducing circuit controls the phase and magnitude of the induced harmonic current component such that a second harmonic current at the AC input port is suppressed. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A power supply apparatus, comprising:
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an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a DC voltage at a rectifier circuit output from an AC input voltage at the AC input port; and
a selective harmonic inducing current regulator circuit, coupled to the rectifier output, that regulates a DC component of a current delivered to a load coupled to the rectifier circuit output and selectively induces a harmonic component in the current delivered to the load to suppress a harmonic current at the AC input port without requiring a current bypass between the AC input port and the rectifier circuit output. - View Dependent Claims (12, 13, 14)
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15. A power supply apparatus, comprising:
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an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a DC voltage at a rectifier circuit output from an AC input voltage at the AC input port;
a selective harmonic inducing current regulator circuit, coupled to the rectifier output, that regulates a DC component of a current delivered to a load coupled to the rectifier circuit output and selectively induces a harmonic component in the current delivered to the load; and
a filter circuit, coupled to the AC input port, that selectively suppresses a first harmonic current at the AC input port, and wherein the selective harmonic inducing current regulator circuit controls the phase and magnitude of the induced harmonic current component such that a second harmonic current at the AC input port is suppressed. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A power supply apparatus, comprising:
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an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a DC voltage at a rectifier circuit output from an AC input voltage at the AC input port; and
a selective harmonic inducing current delivered to a load coupled to the rectifier circuit output and selectively induces a harmonic component in the current delivered to the load, wherein the selective harmonic inducing current regulator circuit comprises a current control circuit that controls the current delivered to the load responsive to a current reference signal, and wherein the selective harmonic inducing current regulator circuit further comprises;
a first current reference signal generating circuit that generates a first current reference signal that commands a DC current component for the current delivered to the load;
a second current reference signal generating circuit that generates a second current reference signal that commands a harmonic current component for the current delivered to the load; and
a combining circuit that combines the first and second reference current signals to generate a third current reference signal; and
wherein the current control circuit is responsive to the third reference current signal.- View Dependent Claims (26, 27)
a reference signal generating circuit, coupled to the AC input port, that generates a reference signal that is synchronized to the AC input voltage; and
a phase and magnitude control circuit that generates the second current reference signal from the reference signal.
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27. An apparatus according to claim 26, wherein the reference signal generator comprises:
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a phase locked loop, coupled to the AC input port, that generates a first reference signal that is phase locked to the AC input voltage;
a frequency multiplier that generates a second reference signal from the first reference signal;
a phase shifter circuit that produces a third reference signal from the second reference signal, the third reference signal phase shifted with respect to the second reference signal; and
a variable gain circuit that produces the current reference signal from the third reference signal such that the magnitude of the current reference signal varies responsive to a control signal applied to the variable gain circuit.
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28. A power supply apparatus, comprising:
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an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a DC voltage at a rectifier circuit output from an AC input voltage at the AC input port;
a filter circuit, coupled to the AC input port, that suppresses a first harmonic current at the AC input port; and
a selective harmonic inducing current regulator circuit, coupled to the rectifier output, that regulates a DC component of a current delivered to a load coupled to the rectifier circuit output and that selectively induces a harmonic component in the current delivered to the load to thereby suppress a second harmonic current at the AC input port. - View Dependent Claims (29, 30, 31, 32, 33)
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34. An uninterruptible power supply apparatus, comprising:
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an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a rectified DC voltage at a rectifier circuit output from an AC input voltage at the AC input port;
a selective harmonic current inducing voltage regulator circuit, coupled to the rectifier output, that regulates the rectified DC voltage to produce a regulated DC voltage, that regulates a DC component of a current delivered by the rectifier circuit and that selectively induces a harmonic component in the delivered current; and
an inverter circuit, coupled to the selective harmonic current inducing voltage regulator circuit, that produces an AC output voltage from the regulated DC voltage;
wherein the selective harmonic current inducing voltage regulator circuit suppresses a harmonic input current at the AC input port without requiring a current bypass between the AC input port and the rectifier circuit output. - View Dependent Claims (35, 36, 37, 38)
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39. An uninterruptible power supply apparatus, comprising:
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an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a rectified DC voltage at a rectifier circuit output form an AC input voltage at the AC input port;
a selective harmonic current inducting voltage regulator circuit, coupled to the rectifier output, that regulates the rectified DC voltage to produce a regulated DC voltage, that regulates a DC component of a current delivered by the rectifier circuit and that selectively induces a harmonic component in the delivered current;
an inverter circuit, coupled to the to selective harmonic current inducing voltage regulator circuit, that produces an AC output voltage from the regulated DC voltage; and
a filter circuit, coupled to the AC input port, that selectively suppresses a first harmonic current at the AC input port, and wherein the selective harmonic current inducing voltage regulator circuit controls the phase and magnitude of the induced harmonic current component such that a second harmonic current at the AC input port is suppressed. - View Dependent Claims (40, 41, 42, 43, 44)
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45. An uninterruptible power supply apparatus, comprising:
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an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a rectified DC voltage at a rectifier circuit output form an AC input voltage at a AC input port;
a selective harmonic current inducing voltage regulator circuit, coupled to the rectifier output, that regulates the rectified DC voltage to produce a regulated DC voltage, that regulated a DC component of a current delivered by the rectifier circuit and that selectively induces a harmonic component in the delivered current; and
an inverter circuit, coupled to the to selective harmonic current inducing voltage regulator circuit, that produces an AC output voltage from the regulated C voltage;
wherein the selective harmonic current inducing voltage regulator circuit controls a phase and a magnitude of the induced harmonic current component;
wherein the selective harmonic current inducing voltage regulator circuit comprises a current control circuit that controls the current delivered by the rectifier circuit responsive to a current reference signal; and
wherein the selective harmonic current inducing voltage regulator circuit further comprises;
a first current reference signal generating circuit that generates a first current reference signal that commands a DC current component for the current delivered by the rectifier circuit;
a second current reference signal generating circuit that generates a second current reference signal that commands a harmonic current component for the current delivered by the rectifier circuit; and
a combining circuit that combines the first and second reference current signals to generate a third current reference signal; and
wherein the current control circuit is responsive to the third reference current signal. - View Dependent Claims (46, 47)
a reference signal generating circuit, coupled to the AC input port, that generates a reference signal that is synchronized to the AC input voltage; and
a phase and magnitude control circuit that generates the second current reference signal from the reference signal.
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47. An apparatus according to claim 46, wherein the reference signal generator comprises:
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a phase locked loop, coupled to the AC input port, that generates a first reference signal that is phase locked to the AC input voltage;
a frequency multiplier that generates a second reference signal from the first reference signal;
a phase shifter circuit that produces a third reference signal from the second reference signal, the third reference signal phase shifted with respect to the second reference signal; and
a variable gain circuit that produces the current reference signal from the third reference signal such that the magnitude of the current reference signal varies responsive to a control signal applied to the variable gain circuit.
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48. A method of operating a rectifier circuit that produces a DC voltage at a rectifier circuit output from an AC voltage applied to an input of the rectifier circuit, the method comprising:
selectively inducing a harmonic component in a current delivered to a load from the rectifier circuit output to suppress a selected harmonic input current at the input of the rectifier without requiring a current bypass between a source of the AC voltage applied to the input of the rectifier circuit and the rectifier circuit output. - View Dependent Claims (49)
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50. A method of operating a rectifier circuit that produces a DC voltage at a rectifier circuit output from an AC voltage applied to an input of the rectifier circuit, the method comprising:
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selectively inducing a harmonic component in a current delivered to a load from the rectifier circuit output to suppress a selected harmonic input current at the input of the rectifier; and
filtering a first harmonic current at the rectifier circuit input, wherein selectively inducing a harmonic component comprises the step of controlling at lease one of th magnitude and phase of the induced harmonic component to suppress a second harmonic current at the rectifier circuit input. - View Dependent Claims (51, 52, 53, 54)
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55. A power supply apparatus, comprising:
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an AC input port;
a rectifier circuit, coupled to the AC input port, that produces a DC voltage at a rectifier circuit output from an AC input voltage at the AC input port; and
a selective harmonic current inducing circuit, coupled to the rectifier circuit output, that induces a sixth order harmonic component in a current delivered to a load from the rectifier circuit output such that a harmonic current at the AC input port is suppressed. - View Dependent Claims (56, 57, 58, 59, 60, 61)
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Specification