Control device, motor driving apparatus, and motor driving system
AssigneeFuji Electric Co., Ltd.
InventorMasaki Hirakata
Life of this patent
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Abstract
A control device includes a control circuit configured to control an inverter circuit that drives a motor by a plurality of switching elements coupled between DC buses, a first power supply system using a voltage source different from the DC buses as a power supply, a second power supply system using the DC buses as a power supply, and a switching circuit configured to switch a power supply system that supplies power to the control circuit from the first power supply system to the second power supply system when an abnormality in the first power supply system is detected. The control circuit continues control of the inverter circuit with a power consumption lower than that before the abnormality is detected in the first power supply system, when the abnormality is detected.
Claims19
A control device comprising:
- a control circuit configured to control an inverter circuit that drives a motor by a plurality of switching elements coupled between DC buses;
- a first power supply system using a voltage source different from the DC buses as a power supply;
- a second power supply system using the DC buses as a power supply;
- and
- a switching circuit configured to switch a power supply system that supplies power to the control circuit from the first power supply system to the second power supply system when an abnormality in the first power supply system is detected, wherein
- the control circuit continues control of the inverter circuit with a power consumption lower than that before the abnormality is detected in the first power supply system, when the abnormality is detected,
- each of the plurality of switching elements is formed by multiple switching elements coupled in parallel, and
- in a state Where one or more switching, elements forming a portion of the multiple switching elements are off in each of the plurality of switching elements, the control circuit switches remaining switching elements of the multiple switching elements in each of the plurality of switching elements, when the abnormality is detected.
A control device comprising:
- a control circuit configured to control an inverter circuit that drives a motor by a plurality of switching elements coupled between DC buses;
- a first power supply system using a voltage source different from the DC buses as a power supply;
- a second power supply system using the DC buses as a power supply;
- and
- a switching circuit configured to switch a power supply system that supplies power to the control circuit from the first power supply system to the second power supply system when an abnormality in the first power supply system is detected, wherein
- the control circuit continues control of the inverter circuit With a power consumption lower than that before the abnormality is detected in the first power supply system, when the abnormality is detected, and
- the control circuit continues gate drive of the plurality of switching elements at a gate power supply voltage lower than that before the abnormality is detected, when the abnormality is detected.
Dependencies are inferred from the claim text.