Systems and methods for operating a fluid supply system. The methods comprise: using a micro-turbine and an Energy Harvesting Circuit (EHC) to harvest energy from a fluid flowing through a pipeline; operating a switch to disconnect the EHC from the micro-turbine when an amount of energy harvested reaches a threshold value; detecting by a sensor device an amount of natural fluid flow through the pipeline while the EHC is disconnected from the micro-turbine; and operating the switch to reconnect the EHC to the micro-turbine after the amount of natural fluid flow has been detected.

Systems and methods for operating a fluid supply system. The methods comprise: using a micro-turbine and an Energy Harvesting Circuit (EHC) to harvest energy from a fluid flowing through a pipeline; operating a switch to disconnect the EHC from the micro-turbine when an amount of energy harvested reaches a threshold value; detecting by a sensor device an amount of natural fluid flow through the pipeline while the EHC is disconnected from the micro-turbine; and operating the switch to reconnect the EHC to the micro-turbine after the amount of natural fluid flow has been detected.

In one an exemplary aspect of the present disclosure, an engine includes a drive shaft; an electric machine including a stator assembly and a rotor assembly, the rotor assembly rotatable relative to the stator assembly; and an electrical break, the drive shaft coupled to the rotor assembly through the electrical break.

In one an exemplary aspect of the present disclosure, an engine includes a drive shaft; an electric machine including a stator assembly and a rotor assembly, the rotor assembly rotatable relative to the stator assembly; and an electrical break, the drive shaft coupled to the rotor assembly through the electrical break.

A vehicle comprises an electric motor, an electric motor control device which controls electric power to be supplied to the electric motor, an atmospheric pressure detection part which detects atmospheric pressure, and a storage part which stores the number of times that a voltage exceeding a partial discharge inception voltage set according to the atmospheric pressure detected by the atmospheric pressure detection part is input to the electric motor.

A vehicle comprises an electric motor, an electric motor control device which controls electric power to be supplied to the electric motor, an atmospheric pressure detection part which detects atmospheric pressure, and a storage part which stores the number of times that a voltage exceeding a partial discharge inception voltage set according to the atmospheric pressure detected by the atmospheric pressure detection part is input to the electric motor.

A motor driving apparatus includes a first module on which an inverter circuit configured to supply a driving current to a motor is mounted, a second module on which a control circuit configured to control the inverter circuit is mounted, and a third module on which a power circuit configured to supply direct-current (DC) power to at least one of the inverter circuit and the control circuit. The first module and the second module are attachable to and detachable from the third module.

A motor driving apparatus includes a first module on which an inverter circuit configured to supply a driving current to a motor is mounted, a second module on which a control circuit configured to control the inverter circuit is mounted, and a third module on which a power circuit configured to supply direct-current (DC) power to at least one of the inverter circuit and the control circuit. The first module and the second module are attachable to and detachable from the third module.

A motor drive control device causes a single phase motor including a coil of a first system and a coil of a second system to be driven. The motor drive control device has a first driving circuit configured to perform control to energize the coil of the first system, a second driving circuit configured to perform control to energize the coil of the second system, and a driving control unit configured to control an operation of the first driving circuit and an operation of the second driving circuit. The driving control unit has a driving voltage detecting unit configured to detect a driving voltage applied to the first driving circuit and a driving voltage applied to the second driving circuit, and a compensation control unit configured to cause one driving circuit between the first driving circuit and the second driving circuit to execute a maintenance operation for maintaining rotation of the single phase motor, based on a detection result of the driving voltage detecting unit.

A motor drive control device causes a single phase motor including a coil of a first system and a coil of a second system to be driven. The motor drive control device has a first driving circuit configured to perform control to energize the coil of the first system, a second driving circuit configured to perform control to energize the coil of the second system, and a driving control unit configured to control an operation of the first driving circuit and an operation of the second driving circuit. The driving control unit has a driving voltage detecting unit configured to detect a driving voltage applied to the first driving circuit and a driving voltage applied to the second driving circuit, and a compensation control unit configured to cause one driving circuit between the first driving circuit and the second driving circuit to execute a maintenance operation for maintaining rotation of the single phase motor, based on a detection result of the driving voltage detecting unit.