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US 11,909,256 B2Granted
Switching module and power supply system
AssigneeMurata Manufacturing Co., Ltd.
InventorKazuo Hattori
Life of this patent
Estimating the term…
Abstract
A switching module includes mechanical relays, semiconductor switches, voltage detectors to detect an input voltage to a power converter, and a controller. When the controller determines that the waveform of the input voltage is abnormal during a first determination period, the controller outputs an open command signal to mechanical relays corresponding to a power source electrically coupled to the power converter. When the controller subsequently determines that the waveform of the input voltage is normal during a second determination period, the controller outputs a close command signal to the mechanical relays.
Claims18
A switching module to output to a subsequent circuit electric power supplied from one of a plurality of power sources, the switching module comprising:
- a plurality of mechanical relays coupled between the plurality of power sources and the subsequent circuit;
- a plurality of semiconductor switches respectively coupled in parallel with the plurality of mechanical relays;
- a voltage detector to detect an input voltage to the subsequent circuit;
- and
- a controller configured or programmed to control connection and disconnection of the plurality of mechanical relays to electrically couple one of the plurality of power sources to the subsequent circuit;
- wherein
- the controller is configured or programmed to:
- when determining that the input voltage is abnormal during a preset first determination period, output an open command signal to open a closed mechanical relay of the plurality of mechanical relays to the closed mechanical relay, and to control, of the plurality of semiconductor switches, a semiconductor switch coupled in parallel with the mechanical relay receiving the open command signal to drive the semiconductor switch into an ON state, after the first determination period elapses;
- when determining that the input voltage is normal during a preset second determination period longer than the first determination period, output a close command signal to close the mechanical relay receiving the open command signal to the mechanical relay receiving the open command signal, and to control the semiconductor switch coupled in parallel with the mechanical relay receiving the open command signal to drive the semiconductor switch into an ON state;
- and
- when determining that the input voltage is abnormal during the second determination period, control the semiconductor switch coupled in parallel with the mechanical relay receiving the open command signal to drive the semiconductor switch into an OFF state, and subsequently output the close command signal to an open mechanical relay different from the mechanical relay receiving the open command signal of the plurality of mechanical relays.
8 more elements
A power supply system comprising:
- a power converter to convert inputted electric power and supply the electric power to a load;
- and
- a switching module to output to the power converter electric power supplied from one of a plurality of power sources;
- wherein
- the switching module includes:
- a plurality of mechanical relays coupled between the plurality of power sources and the power converter;
- a plurality of semiconductor switches respectively coupled in parallel with the plurality of mechanical relays;
- a voltage detector configured to detect an input voltage to the power converter;
- and
- a controller configured to control connection and disconnection of the plurality of mechanical relays to electrically couple one of the plurality of power sources to the power converter,
- the controller is configured or programmed to:
- when determining that the input voltage is abnormal during a preset first determination period, output an open command signal to opening a closed mechanical relay of the plurality of mechanical relays to the closed mechanical relay, and to control, of the plurality of semiconductor switches, a semiconductor switch coupled in parallel with the mechanical relay receiving the open command signal to drive the semiconductor switch into an ON state;
- after the first determination period elapses, when determining that the input voltage is normal during a preset second determination period longer than the first determination period, output a close command signal to close the mechanical relay receiving the open command signal to the mechanical relay receiving the open command signal, and to control the semiconductor switch coupled in parallel with the mechanical relay receiving the open command signal to drive the semiconductor switch into an ON state;
- and
- when determining that the input voltage is abnormal during the second determination period, control the semiconductor switch coupled in parallel with the mechanical relay receiving the open command signal to drive the semiconductor switch into an OFF state, and subsequently output the close command signal to an open mechanical relay different from the mechanical relay receiving the open command signal of the plurality of mechanical relays.
12 more elements
Dependencies are inferred from the claim text.