POWER CONVERSION APPARATUS
First Claim
1. A power conversion apparatus, comprising:
- a plurality of semiconductor switching elements;
a reactor;
a low voltage-side capacitor;
a high voltage-side capacitor;
a charging-discharging capacitor; and
a control unit configured to control driving of the plurality of semiconductor switching elements at a set driving frequency,the plurality of semiconductor switching elements comprising;
a first semiconductor switching element including a first terminal connected to a negative electrode of the low voltage-side capacitor;
a second semiconductor switching element including a first terminal connected to a second terminal of the first semiconductor switching element and a second terminal connected to a positive electrode of the low voltage-side capacitor via the reactor;
a third semiconductor switching element including a first terminal connected to the second terminal of the second semiconductor switching element; and
a fourth semiconductor switching element including a first terminal connected to a second terminal of the third semiconductor switching element and a second terminal connected to a positive electrode of the high voltage-side capacitor,the charging-discharging capacitor being connected between a junction point of the first semiconductor switching element with the second semiconductor switching element and a junction point of the third semiconductor switching element with the fourth semiconductor switching element,the charging-discharging capacitor having a plurality of capacitor elements connected in parallel via a first wiring and a second wiring,at least one of inductance components and capacitance components of the plurality of capacitor elements at the time when viewed from outflow-inflow portions of the first wiring and the second wiring being different from each other such that the charging-discharging capacitor has no parallel resonance point in a driving frequency band but has a parallel resonance point in a noise frequency band.
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Accused Products
Abstract
In a power conversion apparatus including first to fourth semiconductor switching elements connected in series across both terminals of a high voltage-side capacitor, the third and fourth semiconductor switching elements are connected across both terminals of a low voltage-side capacitor via a reactor, and both terminals of the second and third semiconductor switching elements are connected across a charging-discharging capacitor. This charging-discharging capacitor includes a plurality of capacitor elements connected in parallel via a first wiring and a second wiring. Inductance components or capacitance components of the plurality of capacitor elements when viewed from an outflow-inflow portion of the first wiring and an outflow-inflow portion of the second wiring are different from each other such that the charging-discharging capacitor does not have a parallel resonance point in a driving frequency band but has a parallel resonance point in a noise frequency band.
8 Citations
14 Claims
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1. A power conversion apparatus, comprising:
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a plurality of semiconductor switching elements; a reactor; a low voltage-side capacitor; a high voltage-side capacitor; a charging-discharging capacitor; and a control unit configured to control driving of the plurality of semiconductor switching elements at a set driving frequency, the plurality of semiconductor switching elements comprising; a first semiconductor switching element including a first terminal connected to a negative electrode of the low voltage-side capacitor; a second semiconductor switching element including a first terminal connected to a second terminal of the first semiconductor switching element and a second terminal connected to a positive electrode of the low voltage-side capacitor via the reactor; a third semiconductor switching element including a first terminal connected to the second terminal of the second semiconductor switching element; and a fourth semiconductor switching element including a first terminal connected to a second terminal of the third semiconductor switching element and a second terminal connected to a positive electrode of the high voltage-side capacitor, the charging-discharging capacitor being connected between a junction point of the first semiconductor switching element with the second semiconductor switching element and a junction point of the third semiconductor switching element with the fourth semiconductor switching element, the charging-discharging capacitor having a plurality of capacitor elements connected in parallel via a first wiring and a second wiring, at least one of inductance components and capacitance components of the plurality of capacitor elements at the time when viewed from outflow-inflow portions of the first wiring and the second wiring being different from each other such that the charging-discharging capacitor has no parallel resonance point in a driving frequency band but has a parallel resonance point in a noise frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification