Inverter for a driving a motor
AssigneeTrigence Semiconductor, Inc.
InventorsAkira Yasuda, Jun-ichi Okamura
Life of this patent
Estimating the term…
Abstract
An inverter for generating a plurality of alternating signals to be supplied to a motor, the motor having a plurality of phases and a plurality of coils arranged at each of the plurality of phases is provided. The inverter is a motor driving inverter characterized in including a multi-level pulse-density modulator configured to modulate a signal that fluctuates periodically and controls rotation of the motor; and a plurality of switching elements configured to generate each of the plurality of alternating signals by controlling an ON/OFF of a direct current according to selection by an output signal of the pulse-density modulator.
Claims6
An operating method of an inverter generating a plurality of alternating signals to be supplied to a motor, the motor including a plurality of phases and a plurality of coils arranged at each of the plurality of phases, the method comprising:
- modulating a signal that fluctuates periodically and controls rotation of the motor by a pulse-density modulator and generating an output signal;
- and
- selecting each of a plurality of switching elements so as to uniform a selected frequency of each of the plurality of switching elements according to the output signal and generating each of the plurality of alternating signals and controlling an ON/OFF of a direct current.
An inverter for generating a plurality of alternating signals to be supplied to a motor, the motor having a plurality of phases and a plurality of coils arranged at each of the plurality of phases, the inverter comprising:
- a multi-level pulse-density modulator configured to modulate a signal that fluctuates periodically and controls rotation of the motor;
- a plurality of switching elements configured to generate each of the plurality of alternating signals by controlling an ON/OFF of a direct current according to selection by an output signal of the pulse-density modulator;
- and
- a filter circuit configured to uniform the selection frequency of each of the plurality of switching elements, the filter circuit being input with the output signal of the pulse-density modulator, each of the plurality of switching elements generating each alternating signal supplied to each coil at each of the plurality of phases, each of the plurality of switching elements being selected by the output signal of the pulse-density modulator.
Dependencies are inferred from the claim text.