Inverter
First Claim
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1. An inverter comprising:
- an inverter circuit formed of an upper-arm switching element and a lower-arm switching element connected to DC power supply, the inverter circuit that provides DC with pulse-width modulation so as to output AC to a load; and
a current sensor for detecting the current of the load,wherein, an average value of DC that flows between the DC power supply and the inverter circuit is obtained by calculation according to a calculated product of an ON-period in which either the upper-arm switching element or the lower-arm switching element turns on and a current value detected by the current sensor.
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Abstract
An inverter has an inverter circuit and a current detector. In the inverter circuit, upper-arm switching elements and lower-arm switching elements, which are connected to DC power supply, provide DC with pulse-width modulation (PWM) so as to output AC to a load. The current detector detects current of the load. With the structure above, the inverter calculates an average value of DC that flows between the DC power supply and the inverter circuit according to a product of an ON-period in which any one of the switching elements maintains ON and a current value detected by the current sensor.
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Citations
31 Claims
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1. An inverter comprising:
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an inverter circuit formed of an upper-arm switching element and a lower-arm switching element connected to DC power supply, the inverter circuit that provides DC with pulse-width modulation so as to output AC to a load; and a current sensor for detecting the current of the load, wherein, an average value of DC that flows between the DC power supply and the inverter circuit is obtained by calculation according to a calculated product of an ON-period in which either the upper-arm switching element or the lower-arm switching element turns on and a current value detected by the current sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification