POWER CONVERSION APPARATUS WITH LOW COMMON MODE NOISE AND APPLICATION SYSTEMS THEREOF
First Claim
1. A power conversion apparatus with low common mode noise, comprising:
- a power conversion circuit, the power conversion circuit comprising;
an AC source;
a power conversion unit with DC terminals and AC terminals; and
a filter inductor unit, the filter inductor unit including first terminals and second terminals, the first terminals of the filter inductor unit being connected to the AC source, and the second terminals of the filter inductor unit being connected to the AC terminals of the power conversion unit; and
a common mode noise suppression circuit, the common mode noise suppression circuit comprising;
a capacitive impedance network, including first terminals and second terminals;
an impedance balancing network, including first terminals and second terminals;
wherein the second terminals of the capacitive impedance network are connected to the first terminals of the impedance balancing network, the first terminals of the capacitive impedance network are connected to the first terminals of the filter inductor unit, and the second terminals of the impedance balancing network are connected to the DC terminals of the power conversion unit;
the impedance balancing network and the filter inductor unit are configured to have the same impedance characteristics in a preset frequency band of electromagnetic interference.
1 Assignment
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Accused Products
Abstract
A power conversion apparatus, comprising: a power conversion circuit comprising an AC source; a power conversion unit with DC terminals and AC terminals; a filter inductor unit including first and second terminals, the first terminals of the filter inductor unit being connected to the AC source, the second terminals of the filter inductor unit being connected to the AC terminals of the power conversion unit; a common mode noise suppression circuit comprising a capacitive impedance network including first and second terminals; an impedance balancing network including first and second terminals; the second terminals of the capacitive impedance network are connected to the first terminals of the impedance balancing network, the first terminals of the capacitive impedance network are connected to the first terminals of the filter inductor unit, and the second terminals of the impedance balancing network are connected to the DC terminals of the power conversion unit.
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Citations
19 Claims
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1. A power conversion apparatus with low common mode noise, comprising:
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a power conversion circuit, the power conversion circuit comprising; an AC source; a power conversion unit with DC terminals and AC terminals; and a filter inductor unit, the filter inductor unit including first terminals and second terminals, the first terminals of the filter inductor unit being connected to the AC source, and the second terminals of the filter inductor unit being connected to the AC terminals of the power conversion unit; and a common mode noise suppression circuit, the common mode noise suppression circuit comprising; a capacitive impedance network, including first terminals and second terminals; an impedance balancing network, including first terminals and second terminals; wherein the second terminals of the capacitive impedance network are connected to the first terminals of the impedance balancing network, the first terminals of the capacitive impedance network are connected to the first terminals of the filter inductor unit, and the second terminals of the impedance balancing network are connected to the DC terminals of the power conversion unit; the impedance balancing network and the filter inductor unit are configured to have the same impedance characteristics in a preset frequency band of electromagnetic interference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An energy conversion system, comprising:
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an AC source; a first power conversion unit with DC terminals and AC terminals; a second power conversion unit with DC terminals and AC terminals; a motor; and a common mode noise suppression circuit; wherein the AC source is coupled to the AC terminals of the first power conversion unit, the DC terminals of the first power conversion unit are coupled to the DC terminals of the second power conversion unit, the AC terminals of the second power conversion unit are electrically coupled to the motor, and the common mode noise suppression circuit is coupled to the first power conversion unit; the first power conversion unit comprising; a first power conversion circuit with DC terminals and AC terminals; and a filter inductor unit, the filter inductor unit including first terminals and second terminals, the first terminals of the filter inductor unit being connected to the AC source, and the second terminals of the filter inductor unit being connected to the AC terminals of the first power conversion unit; and the common mode noise suppression circuit comprising; a capacitive impedance network, including first terminals and second terminals; an impedance balancing network, including first terminals and second terminals; wherein the second terminals of the capacitive impedance network are connected to the first terminals of the impedance balancing network, the first terminals of the capacitive impedance network are connected to the first terminals of the filter inductor unit, and the second terminals of the impedance balancing network are connected to the DC terminals of the first power conversion unit; the impedance balancing network and the filter inductor unit are configured to have the same impedance characteristics in a preset frequency band of electromagnetic interference. - View Dependent Claims (17)
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18. A power quality device, comprising:
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an inverter circuit unit connected to an AC source, for compensating the reactive power and/or harmonics generated by a nonlinear load that is electrically connected to the AC source, the inverter circuit unit comprising; an inverter circuit, with DC terminals and AC terminals; and a filter inductor unit, the filter inductor unit including first terminals and second terminals, the first terminals of the filter inductor unit being connected to the AC source, and the second terminals of the filter inductor unit being connected to the AC terminals of the inverter circuit; and a common mode noise suppression circuit, comprising; a capacitive impedance network, including first terminals and second terminals; an impedance balancing network, including first terminals and second terminals; wherein the second terminals of the capacitive impedance network are connected to the first terminals of the impedance balancing network, the first terminals of the capacitive impedance network are connected to the first terminals of the filter inductor unit, and the second terminals of the impedance balancing network are connected to the DC terminals of the inverter circuit; the impedance balancing network and the filter inductor unit are configured to have the same impedance characteristics in a preset frequency band of electromagnetic interference.
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19. An energy control system, comprising:
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a DC source; an AC source; an inverter circuit unit, comprising; an inverter circuit, with DC terminals and AC terminals; and a filter inductor unit, the filter inductor unit including first terminals and second terminals, the first terminals of the filter inductor unit being connected to the AC source, and the second terminals of the filter inductor unit being connected to the AC terminals of the inverter circuit; and a common mode noise suppression circuit, comprising; a capacitive impedance network, including first terminals and second terminals; an impedance balancing network, including first terminals and second terminals; wherein the second terminals of the capacitive impedance network are connected to the first terminals of the impedance balancing network, the first terminals of the capacitive impedance network are connected to the first terminals of the filter inductor unit, the second terminals of the impedance balancing network are connected to the DC terminals of the inverter circuit, and the DC terminals of the inverter circuit are connected to the DC source; the impedance balancing network and the filter inductor unit are configured to have the same impedance characteristics in a preset frequency band of electromagnetic interference band.
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Specification