Multiphase current supplying circuit, driving apparatus, compressor and air conditioner
AssigneeDaikin Industries, Ltd.
InventorsHiroyuki Yamai, Morimitsu Sekimoto
Life of this patent
Estimating the term…
Abstract
A multiphase current supplying circuit includes a converter, an intervening circuit, an inverter, a control circuit and a lightning arrester. A power supply system is connected to the converter with the lightning arrester interposed therebetween, and the ac voltage is rectified. The intervening circuit includes a capacitor and a bypass connected in parallel thereto. In the bypass, a diode, a resistor and a capacitor are connected in series, and the direction from an anode to a cathode of the diode corresponds to the direction from a high potential side to a low potential side of the smoothing capacitor.
Claims18
A multiphase current supplying circuit comprising:
- a peak-value suppressor connected to an ac power supply outputting an ac voltage, the peak-value suppressing device suppressing a surge voltage superimposed on said ac voltage;
- a converter receiving said ac voltage from said ac power supply via said peak-value suppressing device and rectifying said ac voltage;
- a capacitor receiving an output of said converter;
- a first bypass connected in parallel to said capacitor, said first bypass including a series connection of a resistive element and a capacitive element;
- and
- an inverter receiving a both-end voltage of said capacitor and outputting multiphase ac currents.
A multiphase current supplying circuit comprising:
- a peak-value suppressor connected to an ac power supply outputting an ac voltage, the peak-value suppressing device suppressing a surge voltage superimposed on said ac voltage;
- a converter receiving said ac voltage from said ac power supply via said peak-value suppressing device and rectifying said ac voltage;
- a capacitor receiving an output of said converter;
- a first bypass connected in parallel to said capacitor, said first bypass including a series connection of a diode and a capacitive element, and a direction from an anode to a cathode of said diode coinciding with a direction from a high potential side to a low potential side of said capacitor;
- and
- an inverter receiving a both-end voltage of said capacitor and outputting multiphase ac currents.
A multiphase current supplying circuit comprising:
- a peak-value suppressor connected to an ac power supply outputting an ac voltage, the peak-value suppressing device suppressing a surge voltage superimposed on said ac voltage;
- a converter receiving said ac voltage from said ac power supply via said peak-value suppressing device and rectifying said ac voltage;
- a capacitor receiving an output of said converter;
- a first bypass connected in parallel to said capacitor, said first bypass conducting when a both-end voltage exceeds a first predetermined value and non-conducting when said both-end voltage falls below a second predetermined value not higher than said first predetermined value;
- and
- an inverter receiving a both-end voltage of said capacitor and outputting multiphase ac currents.
Dependencies are inferred from the claim text.