INVERTER CONTROL APPARATUS AND AIR CONDITIONER
First Claim
1. An inverter control apparatus comprising:
- inverter circuits configured to convert direct current power into three-phase alternating current power, and to supply three-phase alternating current power to synchronous motors;
current detection units configured to detect currents flowing through the inverter circuits; and
an inverter control unit configured to determine and output voltage command values supplied to the synchronous motors based on the detected currents,wherein the inverter control unit includesan A/D conversion unit that converts the detected currents into digital data;
a first inverter control unit that generates a first trigger which starts conversion in the A/D conversion unit, based on start timing information of the A/D conversion unit and a first carrier signal;
a second inverter control unit that generates a second trigger which starts conversion of the A/D conversion unit, based on start timing information of the A/D conversion unit and a second carrier signal; and
an A/D start factor selection unit that receives either the first trigger or the second trigger, and selects an A/D start factor in a predetermined period of an operation periods of the first carrier signal and the second carrier signal.
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Accused Products
Abstract
A controller of an inverter control apparatus includes an A/D conversion unit that performs digital conversion of an input signal when a signal for either an A/D converter start trigger or an A/D converter start trigger is input thereinto; a first inverter control unit that generates the A/D converter start trigger which starts the A/D conversion unit, based on A/D converter start timing information and a first carrier signal; a second inverter control unit that generates the A/D converter start trigger which starts the A/D conversion unit, based on A/D converter start timing information and a second carrier signal; and an A/D start factor selection unit that receives either the A/D converter start trigger or the A/D converter start trigger and selects an A/D start factor at a predetermined period timing of an operation period of the first carrier signal and the second carrier signal.
10 Citations
10 Claims
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1. An inverter control apparatus comprising:
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inverter circuits configured to convert direct current power into three-phase alternating current power, and to supply three-phase alternating current power to synchronous motors; current detection units configured to detect currents flowing through the inverter circuits; and an inverter control unit configured to determine and output voltage command values supplied to the synchronous motors based on the detected currents, wherein the inverter control unit includes an A/D conversion unit that converts the detected currents into digital data; a first inverter control unit that generates a first trigger which starts conversion in the A/D conversion unit, based on start timing information of the A/D conversion unit and a first carrier signal; a second inverter control unit that generates a second trigger which starts conversion of the A/D conversion unit, based on start timing information of the A/D conversion unit and a second carrier signal; and an A/D start factor selection unit that receives either the first trigger or the second trigger, and selects an A/D start factor in a predetermined period of an operation periods of the first carrier signal and the second carrier signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification